diff --git a/BTCPayServer/Views/Invoice/Checkout.cshtml b/BTCPayServer/Views/Invoice/Checkout.cshtml
index 38e7c0ae2..cd2c82e0d 100644
--- a/BTCPayServer/Views/Invoice/Checkout.cshtml
+++ b/BTCPayServer/Views/Invoice/Checkout.cshtml
@@ -21,7 +21,7 @@
 		@Model.ToJSVariableModel("srvModel")
     </script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
-    <script src="~/js/vue.js" type="text/javascript" defer="defer"></script>
+    <script src="~/js/vue.min.js" type="text/javascript" defer="defer"></script>
     <script src="~/js/vue-qrcode.js" type="text/javascript" defer="defer"></script>
     <script src="~/js/core.js" type="text/javascript" defer="defer"></script>
     <!-- <script src="img/Intl.js" type="text/javascript" defer="defer"></script>
diff --git a/BTCPayServer/wwwroot/js/core.js b/BTCPayServer/wwwroot/js/core.js
index 22b37b7b9..5de0cf34e 100644
--- a/BTCPayServer/wwwroot/js/core.js
+++ b/BTCPayServer/wwwroot/js/core.js
@@ -14,6 +14,12 @@
 */
 
 // TODO: Vue controller... complete migrate to it for binding, animations can stay in jQuery
+Vue.config.ignoredElements = [
+    'line-items',
+    'low-fee-timeline',
+    // Ignoring custom HTML5 elements, eg: bp-spinner
+    /^bp-/
+]
 var checkoutCtrl = new Vue({
     el: '#checkoutCtrl',
     components: {
diff --git a/BTCPayServer/wwwroot/js/vue.js b/BTCPayServer/wwwroot/js/vue.js
index a53e3f8ed..9d84c53b4 100644
--- a/BTCPayServer/wwwroot/js/vue.js
+++ b/BTCPayServer/wwwroot/js/vue.js
@@ -1,10522 +1,10798 @@
 /*!
- * Vue.js v2.5.1
+ * Vue.js v2.5.13
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
 (function (global, factory) {
-    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-        typeof define === 'function' && define.amd ? define(factory) :
-            (global.Vue = factory());
-}(this, (function () {
-    'use strict';
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.Vue = factory());
+}(this, (function () { 'use strict';
 
-    /*  */
+/*  */
 
-    // these helpers produces better vm code in JS engines due to their
-    // explicitness and function inlining
-    function isUndef(v) {
-        return v === undefined || v === null
+var emptyObject = Object.freeze({});
+
+// these helpers produces better vm code in JS engines due to their
+// explicitness and function inlining
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value e.g. [object Object]
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : typeof val === 'object'
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert a input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if a attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
     }
+  }
+}
 
-    function isDef(v) {
-        return v !== undefined && v !== null
+/**
+ * Check whether the object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind, faster than native
+ */
+function bind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+  // record original fn length
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
     }
+  }
+  return res
+}
 
-    function isTrue(v) {
-        return v === true
-    }
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ */
+function noop (a, b, c) {}
 
-    function isFalse(v) {
-        return v === false
-    }
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
 
-    /**
-     * Check if value is primitive
-     */
-    function isPrimitive(value) {
-        return (
-            typeof value === 'string' ||
-            typeof value === 'number' ||
-            typeof value === 'boolean'
-        )
-    }
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
 
-    /**
-     * Quick object check - this is primarily used to tell
-     * Objects from primitive values when we know the value
-     * is a JSON-compliant type.
-     */
-    function isObject(obj) {
-        return obj !== null && typeof obj === 'object'
-    }
+/**
+ * Generate a static keys string from compiler modules.
+ */
+function genStaticKeys (modules) {
+  return modules.reduce(function (keys, m) {
+    return keys.concat(m.staticKeys || [])
+  }, []).join(',')
+}
 
-    /**
-     * Get the raw type string of a value e.g. [object Object]
-     */
-    var _toString = Object.prototype.toString;
-
-    function toRawType(value) {
-        return _toString.call(value).slice(8, -1)
-    }
-
-    /**
-     * Strict object type check. Only returns true
-     * for plain JavaScript objects.
-     */
-    function isPlainObject(obj) {
-        return _toString.call(obj) === '[object Object]'
-    }
-
-    function isRegExp(v) {
-        return _toString.call(v) === '[object RegExp]'
-    }
-
-    /**
-     * Check if val is a valid array index.
-     */
-    function isValidArrayIndex(val) {
-        var n = parseFloat(String(val));
-        return n >= 0 && Math.floor(n) === n && isFinite(val)
-    }
-
-    /**
-     * Convert a value to a string that is actually rendered.
-     */
-    function toString(val) {
-        return val == null
-            ? ''
-            : typeof val === 'object'
-                ? JSON.stringify(val, null, 2)
-                : String(val)
-    }
-
-    /**
-     * Convert a input value to a number for persistence.
-     * If the conversion fails, return original string.
-     */
-    function toNumber(val) {
-        var n = parseFloat(val);
-        return isNaN(n) ? val : n
-    }
-
-    /**
-     * Make a map and return a function for checking if a key
-     * is in that map.
-     */
-    function makeMap(
-        str,
-        expectsLowerCase
-    ) {
-        var map = Object.create(null);
-        var list = str.split(',');
-        for (var i = 0; i < list.length; i++) {
-            map[list[i]] = true;
-        }
-        return expectsLowerCase
-            ? function (val) { return map[val.toLowerCase()]; }
-            : function (val) { return map[val]; }
-    }
-
-    /**
-     * Check if a tag is a built-in tag.
-     */
-    var isBuiltInTag = makeMap('slot,component', true);
-
-    /**
-     * Check if a attribute is a reserved attribute.
-     */
-    var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
-
-    /**
-     * Remove an item from an array
-     */
-    function remove(arr, item) {
-        if (arr.length) {
-            var index = arr.indexOf(item);
-            if (index > -1) {
-                return arr.splice(index, 1)
-            }
-        }
-    }
-
-    /**
-     * Check whether the object has the property.
-     */
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasOwn(obj, key) {
-        return hasOwnProperty.call(obj, key)
-    }
-
-    /**
-     * Create a cached version of a pure function.
-     */
-    function cached(fn) {
-        var cache = Object.create(null);
-        return (function cachedFn(str) {
-            var hit = cache[str];
-            return hit || (cache[str] = fn(str))
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
         })
-    }
-
-    /**
-     * Camelize a hyphen-delimited string.
-     */
-    var camelizeRE = /-(\w)/g;
-    var camelize = cached(function (str) {
-        return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-    });
-
-    /**
-     * Capitalize a string.
-     */
-    var capitalize = cached(function (str) {
-        return str.charAt(0).toUpperCase() + str.slice(1)
-    });
-
-    /**
-     * Hyphenate a camelCase string.
-     */
-    var hyphenateRE = /\B([A-Z])/g;
-    var hyphenate = cached(function (str) {
-        return str.replace(hyphenateRE, '-$1').toLowerCase()
-    });
-
-    /**
-     * Simple bind, faster than native
-     */
-    function bind(fn, ctx) {
-        function boundFn(a) {
-            var l = arguments.length;
-            return l
-                ? l > 1
-                    ? fn.apply(ctx, arguments)
-                    : fn.call(ctx, a)
-                : fn.call(ctx)
-        }
-        // record original fn length
-        boundFn._length = fn.length;
-        return boundFn
-    }
-
-    /**
-     * Convert an Array-like object to a real Array.
-     */
-    function toArray(list, start) {
-        start = start || 0;
-        var i = list.length - start;
-        var ret = new Array(i);
-        while (i--) {
-            ret[i] = list[i + start];
-        }
-        return ret
-    }
-
-    /**
-     * Mix properties into target object.
-     */
-    function extend(to, _from) {
-        for (var key in _from) {
-            to[key] = _from[key];
-        }
-        return to
-    }
-
-    /**
-     * Merge an Array of Objects into a single Object.
-     */
-    function toObject(arr) {
-        var res = {};
-        for (var i = 0; i < arr.length; i++) {
-            if (arr[i]) {
-                extend(res, arr[i]);
-            }
-        }
-        return res
-    }
-
-    /**
-     * Perform no operation.
-     * Stubbing args to make Flow happy without leaving useless transpiled code
-     * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
-     */
-    function noop(a, b, c) { }
-
-    /**
-     * Always return false.
-     */
-    var no = function (a, b, c) { return false; };
-
-    /**
-     * Return same value
-     */
-    var identity = function (_) { return _; };
-
-    /**
-     * Generate a static keys string from compiler modules.
-     */
-    function genStaticKeys(modules) {
-        return modules.reduce(function (keys, m) {
-            return keys.concat(m.staticKeys || [])
-        }, []).join(',')
-    }
-
-    /**
-     * Check if two values are loosely equal - that is,
-     * if they are plain objects, do they have the same shape?
-     */
-    function looseEqual(a, b) {
-        if (a === b) { return true }
-        var isObjectA = isObject(a);
-        var isObjectB = isObject(b);
-        if (isObjectA && isObjectB) {
-            try {
-                var isArrayA = Array.isArray(a);
-                var isArrayB = Array.isArray(b);
-                if (isArrayA && isArrayB) {
-                    return a.length === b.length && a.every(function (e, i) {
-                        return looseEqual(e, b[i])
-                    })
-                } else if (!isArrayA && !isArrayB) {
-                    var keysA = Object.keys(a);
-                    var keysB = Object.keys(b);
-                    return keysA.length === keysB.length && keysA.every(function (key) {
-                        return looseEqual(a[key], b[key])
-                    })
-                } else {
-                    /* istanbul ignore next */
-                    return false
-                }
-            } catch (e) {
-                /* istanbul ignore next */
-                return false
-            }
-        } else if (!isObjectA && !isObjectB) {
-            return String(a) === String(b)
-        } else {
-            return false
-        }
-    }
-
-    function looseIndexOf(arr, val) {
-        for (var i = 0; i < arr.length; i++) {
-            if (looseEqual(arr[i], val)) { return i }
-        }
-        return -1
-    }
-
-    /**
-     * Ensure a function is called only once.
-     */
-    function once(fn) {
-        var called = false;
-        return function () {
-            if (!called) {
-                called = true;
-                fn.apply(this, arguments);
-            }
-        }
-    }
-
-    var SSR_ATTR = 'data-server-rendered';
-
-    var ASSET_TYPES = [
-        'component',
-        'directive',
-        'filter'
-    ];
-
-    var LIFECYCLE_HOOKS = [
-        'beforeCreate',
-        'created',
-        'beforeMount',
-        'mounted',
-        'beforeUpdate',
-        'updated',
-        'beforeDestroy',
-        'destroyed',
-        'activated',
-        'deactivated',
-        'errorCaptured'
-    ];
-
-    /*  */
-
-    var config = ({
-        /**
-         * Option merge strategies (used in core/util/options)
-         */
-        optionMergeStrategies: Object.create(null),
-
-        /**
-         * Whether to suppress warnings.
-         */
-        silent: false,
-
-        /**
-         * Show production mode tip message on boot?
-         */
-        productionTip: "development" !== 'production',
-
-        /**
-         * Whether to enable devtools
-         */
-        devtools: "development" !== 'production',
-
-        /**
-         * Whether to record perf
-         */
-        performance: false,
-
-        /**
-         * Error handler for watcher errors
-         */
-        errorHandler: null,
-
-        /**
-         * Warn handler for watcher warns
-         */
-        warnHandler: null,
-
-        /**
-         * Ignore certain custom elements
-         */
-        ignoredElements: [],
-
-        /**
-         * Custom user key aliases for v-on
-         */
-        keyCodes: Object.create(null),
-
-        /**
-         * Check if a tag is reserved so that it cannot be registered as a
-         * component. This is platform-dependent and may be overwritten.
-         */
-        isReservedTag: no,
-
-        /**
-         * Check if an attribute is reserved so that it cannot be used as a component
-         * prop. This is platform-dependent and may be overwritten.
-         */
-        isReservedAttr: no,
-
-        /**
-         * Check if a tag is an unknown element.
-         * Platform-dependent.
-         */
-        isUnknownElement: no,
-
-        /**
-         * Get the namespace of an element
-         */
-        getTagNamespace: noop,
-
-        /**
-         * Parse the real tag name for the specific platform.
-         */
-        parsePlatformTagName: identity,
-
-        /**
-         * Check if an attribute must be bound using property, e.g. value
-         * Platform-dependent.
-         */
-        mustUseProp: no,
-
-        /**
-         * Exposed for legacy reasons
-         */
-        _lifecycleHooks: LIFECYCLE_HOOKS
-    });
-
-    /*  */
-
-    var emptyObject = Object.freeze({});
-
-    /**
-     * Check if a string starts with $ or _
-     */
-    function isReserved(str) {
-        var c = (str + '').charCodeAt(0);
-        return c === 0x24 || c === 0x5F
-    }
-
-    /**
-     * Define a property.
-     */
-    function def(obj, key, val, enumerable) {
-        Object.defineProperty(obj, key, {
-            value: val,
-            enumerable: !!enumerable,
-            writable: true,
-            configurable: true
-        });
-    }
-
-    /**
-     * Parse simple path.
-     */
-    var bailRE = /[^\w.$]/;
-    function parsePath(path) {
-        if (bailRE.test(path)) {
-            return
-        }
-        var segments = path.split('.');
-        return function (obj) {
-            for (var i = 0; i < segments.length; i++) {
-                if (!obj) { return }
-                obj = obj[segments[i]];
-            }
-            return obj
-        }
-    }
-
-    /*  */
-
-    var warn = noop;
-    var tip = noop;
-    var generateComponentTrace = (noop); // work around flow check
-    var formatComponentName = (noop);
-
-    {
-        var hasConsole = typeof console !== 'undefined';
-        var classifyRE = /(?:^|[-_])(\w)/g;
-        var classify = function (str) {
-            return str
-                .replace(classifyRE, function (c) { return c.toUpperCase(); })
-                .replace(/[-_]/g, '');
-        };
-
-        warn = function (msg, vm) {
-            var trace = vm ? generateComponentTrace(vm) : '';
-
-            if (config.warnHandler) {
-                config.warnHandler.call(null, msg, vm, trace);
-            } else if (hasConsole && (!config.silent)) {
-                console.error(("[Vue warn]: " + msg + trace));
-            }
-        };
-
-        tip = function (msg, vm) {
-            if (hasConsole && (!config.silent)) {
-                console.warn("[Vue tip]: " + msg + (
-                    vm ? generateComponentTrace(vm) : ''
-                ));
-            }
-        };
-
-        formatComponentName = function (vm, includeFile) {
-            if (vm.$root === vm) {
-                return '<Root>'
-            }
-            var options = typeof vm === 'function' && vm.cid != null
-                ? vm.options
-                : vm._isVue
-                    ? vm.$options || vm.constructor.options
-                    : vm || {};
-            var name = options.name || options._componentTag;
-            var file = options.__file;
-            if (!name && file) {
-                var match = file.match(/([^/\\]+)\.vue$/);
-                name = match && match[1];
-            }
-
-            return (
-                (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-                (file && includeFile !== false ? (" at " + file) : '')
-            )
-        };
-
-        var repeat = function (str, n) {
-            var res = '';
-            while (n) {
-                if (n % 2 === 1) { res += str; }
-                if (n > 1) { str += str; }
-                n >>= 1;
-            }
-            return res
-        };
-
-        generateComponentTrace = function (vm) {
-            if (vm._isVue && vm.$parent) {
-                var tree = [];
-                var currentRecursiveSequence = 0;
-                while (vm) {
-                    if (tree.length > 0) {
-                        var last = tree[tree.length - 1];
-                        if (last.constructor === vm.constructor) {
-                            currentRecursiveSequence++;
-                            vm = vm.$parent;
-                            continue
-                        } else if (currentRecursiveSequence > 0) {
-                            tree[tree.length - 1] = [last, currentRecursiveSequence];
-                            currentRecursiveSequence = 0;
-                        }
-                    }
-                    tree.push(vm);
-                    vm = vm.$parent;
-                }
-                return '\n\nfound in\n\n' + tree
-                    .map(function (vm, i) {
-                        return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-                            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-                            : formatComponentName(vm)));
-                    })
-                    .join('\n')
-            } else {
-                return ("\n\n(found in " + (formatComponentName(vm)) + ")")
-            }
-        };
-    }
-
-    /*  */
-
-    function handleError(err, vm, info) {
-        if (vm) {
-            var cur = vm;
-            while ((cur = cur.$parent)) {
-                var hooks = cur.$options.errorCaptured;
-                if (hooks) {
-                    for (var i = 0; i < hooks.length; i++) {
-                        try {
-                            var capture = hooks[i].call(cur, err, vm, info) === false;
-                            if (capture) { return }
-                        } catch (e) {
-                            globalHandleError(e, cur, 'errorCaptured hook');
-                        }
-                    }
-                }
-            }
-        }
-        globalHandleError(err, vm, info);
-    }
-
-    function globalHandleError(err, vm, info) {
-        if (config.errorHandler) {
-            try {
-                return config.errorHandler.call(null, err, vm, info)
-            } catch (e) {
-                logError(e, null, 'config.errorHandler');
-            }
-        }
-        logError(err, vm, info);
-    }
-
-    function logError(err, vm, info) {
-        {
-            warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
-        }
-        /* istanbul ignore else */
-        if (inBrowser && typeof console !== 'undefined') {
-            console.error(err);
-        } else {
-            throw err
-        }
-    }
-
-    /*  */
-    /* globals MessageChannel */
-
-    // can we use __proto__?
-    var hasProto = '__proto__' in {};
-
-    // Browser environment sniffing
-    var inBrowser = typeof window !== 'undefined';
-    var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-    var isIE = UA && /msie|trident/.test(UA);
-    var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-    var isEdge = UA && UA.indexOf('edge/') > 0;
-    var isAndroid = UA && UA.indexOf('android') > 0;
-    var isIOS = UA && /iphone|ipad|ipod|ios/.test(UA);
-    var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-    // Firefox has a "watch" function on Object.prototype...
-    var nativeWatch = ({}).watch;
-
-    var supportsPassive = false;
-    if (inBrowser) {
-        try {
-            var opts = {};
-            Object.defineProperty(opts, 'passive', ({
-                get: function get() {
-                    /* istanbul ignore next */
-                    supportsPassive = true;
-                }
-            })); // https://github.com/facebook/flow/issues/285
-            window.addEventListener('test-passive', null, opts);
-        } catch (e) { }
-    }
-
-    // this needs to be lazy-evaled because vue may be required before
-    // vue-server-renderer can set VUE_ENV
-    var _isServer;
-    var isServerRendering = function () {
-        if (_isServer === undefined) {
-            /* istanbul ignore if */
-            if (!inBrowser && typeof global !== 'undefined') {
-                // detect presence of vue-server-renderer and avoid
-                // Webpack shimming the process
-                _isServer = global['process'].env.VUE_ENV === 'server';
-            } else {
-                _isServer = false;
-            }
-        }
-        return _isServer
-    };
-
-    // detect devtools
-    var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-    /* istanbul ignore next */
-    function isNative(Ctor) {
-        return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-    }
-
-    var hasSymbol =
-        typeof Symbol !== 'undefined' && isNative(Symbol) &&
-        typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
-
-    /**
-     * Defer a task to execute it asynchronously.
-     */
-    var nextTick = (function () {
-        var callbacks = [];
-        var pending = false;
-        var timerFunc;
-
-        function nextTickHandler() {
-            pending = false;
-            var copies = callbacks.slice(0);
-            callbacks.length = 0;
-            for (var i = 0; i < copies.length; i++) {
-                copies[i]();
-            }
-        }
-
-        // An asynchronous deferring mechanism.
-        // In pre 2.4, we used to use microtasks (Promise/MutationObserver)
-        // but microtasks actually has too high a priority and fires in between
-        // supposedly sequential events (e.g. #4521, #6690) or even between
-        // bubbling of the same event (#6566). Technically setImmediate should be
-        // the ideal choice, but it's not available everywhere; and the only polyfill
-        // that consistently queues the callback after all DOM events triggered in the
-        // same loop is by using MessageChannel.
-        /* istanbul ignore if */
-        if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-            timerFunc = function () {
-                setImmediate(nextTickHandler);
-            };
-        } else if (typeof MessageChannel !== 'undefined' && (
-            isNative(MessageChannel) ||
-            // PhantomJS
-            MessageChannel.toString() === '[object MessageChannelConstructor]'
-        )) {
-            var channel = new MessageChannel();
-            var port = channel.port2;
-            channel.port1.onmessage = nextTickHandler;
-            timerFunc = function () {
-                port.postMessage(1);
-            };
-        } else
-            /* istanbul ignore next */
-            if (typeof Promise !== 'undefined' && isNative(Promise)) {
-                // use microtask in non-DOM environments, e.g. Weex
-                var p = Promise.resolve();
-                timerFunc = function () {
-                    p.then(nextTickHandler);
-                };
-            } else {
-                // fallback to setTimeout
-                timerFunc = function () {
-                    setTimeout(nextTickHandler, 0);
-                };
-            }
-
-        return function queueNextTick(cb, ctx) {
-            var _resolve;
-            callbacks.push(function () {
-                if (cb) {
-                    try {
-                        cb.call(ctx);
-                    } catch (e) {
-                        handleError(e, ctx, 'nextTick');
-                    }
-                } else if (_resolve) {
-                    _resolve(ctx);
-                }
-            });
-            if (!pending) {
-                pending = true;
-                timerFunc();
-            }
-            // $flow-disable-line
-            if (!cb && typeof Promise !== 'undefined') {
-                return new Promise(function (resolve, reject) {
-                    _resolve = resolve;
-                })
-            }
-        }
-    })();
-
-    var _Set;
-    /* istanbul ignore if */ // $flow-disable-line
-    if (typeof Set !== 'undefined' && isNative(Set)) {
-        // use native Set when available.
-        _Set = Set;
-    } else {
-        // a non-standard Set polyfill that only works with primitive keys.
-        _Set = (function () {
-            function Set() {
-                this.set = Object.create(null);
-            }
-            Set.prototype.has = function has(key) {
-                return this.set[key] === true
-            };
-            Set.prototype.add = function add(key) {
-                this.set[key] = true;
-            };
-            Set.prototype.clear = function clear() {
-                this.set = Object.create(null);
-            };
-
-            return Set;
-        }());
-    }
-
-    /*  */
-
-
-    var uid = 0;
-
-    /**
-     * A dep is an observable that can have multiple
-     * directives subscribing to it.
-     */
-    var Dep = function Dep() {
-        this.id = uid++;
-        this.subs = [];
-    };
-
-    Dep.prototype.addSub = function addSub(sub) {
-        this.subs.push(sub);
-    };
-
-    Dep.prototype.removeSub = function removeSub(sub) {
-        remove(this.subs, sub);
-    };
-
-    Dep.prototype.depend = function depend() {
-        if (Dep.target) {
-            Dep.target.addDep(this);
-        }
-    };
-
-    Dep.prototype.notify = function notify() {
-        // stabilize the subscriber list first
-        var subs = this.subs.slice();
-        for (var i = 0, l = subs.length; i < l; i++) {
-            subs[i].update();
-        }
-    };
-
-    // the current target watcher being evaluated.
-    // this is globally unique because there could be only one
-    // watcher being evaluated at any time.
-    Dep.target = null;
-    var targetStack = [];
-
-    function pushTarget(_target) {
-        if (Dep.target) { targetStack.push(Dep.target); }
-        Dep.target = _target;
-    }
-
-    function popTarget() {
-        Dep.target = targetStack.pop();
-    }
-
-    /*  */
-
-    var VNode = function VNode(
-        tag,
-        data,
-        children,
-        text,
-        elm,
-        context,
-        componentOptions,
-        asyncFactory
-    ) {
-        this.tag = tag;
-        this.data = data;
-        this.children = children;
-        this.text = text;
-        this.elm = elm;
-        this.ns = undefined;
-        this.context = context;
-        this.functionalContext = undefined;
-        this.functionalOptions = undefined;
-        this.functionalScopeId = undefined;
-        this.key = data && data.key;
-        this.componentOptions = componentOptions;
-        this.componentInstance = undefined;
-        this.parent = undefined;
-        this.raw = false;
-        this.isStatic = false;
-        this.isRootInsert = true;
-        this.isComment = false;
-        this.isCloned = false;
-        this.isOnce = false;
-        this.asyncFactory = asyncFactory;
-        this.asyncMeta = undefined;
-        this.isAsyncPlaceholder = false;
-    };
-
-    var prototypeAccessors = { child: { configurable: true } };
-
-    // DEPRECATED: alias for componentInstance for backwards compat.
-    /* istanbul ignore next */
-    prototypeAccessors.child.get = function () {
-        return this.componentInstance
-    };
-
-    Object.defineProperties(VNode.prototype, prototypeAccessors);
-
-    var createEmptyVNode = function (text) {
-        if (text === void 0) text = '';
-
-        var node = new VNode();
-        node.text = text;
-        node.isComment = true;
-        return node
-    };
-
-    function createTextVNode(val) {
-        return new VNode(undefined, undefined, undefined, String(val))
-    }
-
-    // optimized shallow clone
-    // used for static nodes and slot nodes because they may be reused across
-    // multiple renders, cloning them avoids errors when DOM manipulations rely
-    // on their elm reference.
-    function cloneVNode(vnode, deep) {
-        var cloned = new VNode(
-            vnode.tag,
-            vnode.data,
-            vnode.children,
-            vnode.text,
-            vnode.elm,
-            vnode.context,
-            vnode.componentOptions,
-            vnode.asyncFactory
-        );
-        cloned.ns = vnode.ns;
-        cloned.isStatic = vnode.isStatic;
-        cloned.key = vnode.key;
-        cloned.isComment = vnode.isComment;
-        cloned.isCloned = true;
-        if (deep && vnode.children) {
-            cloned.children = cloneVNodes(vnode.children);
-        }
-        return cloned
-    }
-
-    function cloneVNodes(vnodes, deep) {
-        var len = vnodes.length;
-        var res = new Array(len);
-        for (var i = 0; i < len; i++) {
-            res[i] = cloneVNode(vnodes[i], deep);
-        }
-        return res
-    }
-
-    /*
-     * not type checking this file because flow doesn't play well with
-     * dynamically accessing methods on Array prototype
-     */
-
-    var arrayProto = Array.prototype;
-    var arrayMethods = Object.create(arrayProto);[
-        'push',
-        'pop',
-        'shift',
-        'unshift',
-        'splice',
-        'sort',
-        'reverse'
-    ]
-        .forEach(function (method) {
-            // cache original method
-            var original = arrayProto[method];
-            def(arrayMethods, method, function mutator() {
-                var args = [], len = arguments.length;
-                while (len--) args[len] = arguments[len];
-
-                var result = original.apply(this, args);
-                var ob = this.__ob__;
-                var inserted;
-                switch (method) {
-                    case 'push':
-                    case 'unshift':
-                        inserted = args;
-                        break
-                    case 'splice':
-                        inserted = args.slice(2);
-                        break
-                }
-                if (inserted) { ob.observeArray(inserted); }
-                // notify change
-                ob.dep.notify();
-                return result
-            });
-        });
-
-    /*  */
-
-    var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-    /**
-     * By default, when a reactive property is set, the new value is
-     * also converted to become reactive. However when passing down props,
-     * we don't want to force conversion because the value may be a nested value
-     * under a frozen data structure. Converting it would defeat the optimization.
-     */
-    var observerState = {
-        shouldConvert: true
-    };
-
-    /**
-     * Observer class that are attached to each observed
-     * object. Once attached, the observer converts target
-     * object's property keys into getter/setters that
-     * collect dependencies and dispatches updates.
-     */
-    var Observer = function Observer(value) {
-        this.value = value;
-        this.dep = new Dep();
-        this.vmCount = 0;
-        def(value, '__ob__', this);
-        if (Array.isArray(value)) {
-            var augment = hasProto
-                ? protoAugment
-                : copyAugment;
-            augment(value, arrayMethods, arrayKeys);
-            this.observeArray(value);
-        } else {
-            this.walk(value);
-        }
-    };
-
-    /**
-     * Walk through each property and convert them into
-     * getter/setters. This method should only be called when
-     * value type is Object.
-     */
-    Observer.prototype.walk = function walk(obj) {
-        var keys = Object.keys(obj);
-        for (var i = 0; i < keys.length; i++) {
-            defineReactive(obj, keys[i], obj[keys[i]]);
-        }
-    };
-
-    /**
-     * Observe a list of Array items.
-     */
-    Observer.prototype.observeArray = function observeArray(items) {
-        for (var i = 0, l = items.length; i < l; i++) {
-            observe(items[i]);
-        }
-    };
-
-    // helpers
-
-    /**
-     * Augment an target Object or Array by intercepting
-     * the prototype chain using __proto__
-     */
-    function protoAugment(target, src, keys) {
-        /* eslint-disable no-proto */
-        target.__proto__ = src;
-        /* eslint-enable no-proto */
-    }
-
-    /**
-     * Augment an target Object or Array by defining
-     * hidden properties.
-     */
-    /* istanbul ignore next */
-    function copyAugment(target, src, keys) {
-        for (var i = 0, l = keys.length; i < l; i++) {
-            var key = keys[i];
-            def(target, key, src[key]);
-        }
-    }
-
-    /**
-     * Attempt to create an observer instance for a value,
-     * returns the new observer if successfully observed,
-     * or the existing observer if the value already has one.
-     */
-    function observe(value, asRootData) {
-        if (!isObject(value) || value instanceof VNode) {
-            return
-        }
-        var ob;
-        if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-            ob = value.__ob__;
-        } else if (
-            observerState.shouldConvert &&
-            !isServerRendering() &&
-            (Array.isArray(value) || isPlainObject(value)) &&
-            Object.isExtensible(value) &&
-            !value._isVue
-        ) {
-            ob = new Observer(value);
-        }
-        if (asRootData && ob) {
-            ob.vmCount++;
-        }
-        return ob
-    }
-
-    /**
-     * Define a reactive property on an Object.
-     */
-    function defineReactive(
-        obj,
-        key,
-        val,
-        customSetter,
-        shallow
-    ) {
-        var dep = new Dep();
-
-        var property = Object.getOwnPropertyDescriptor(obj, key);
-        if (property && property.configurable === false) {
-            return
-        }
-
-        // cater for pre-defined getter/setters
-        var getter = property && property.get;
-        var setter = property && property.set;
-
-        var childOb = !shallow && observe(val);
-        Object.defineProperty(obj, key, {
-            enumerable: true,
-            configurable: true,
-            get: function reactiveGetter() {
-                var value = getter ? getter.call(obj) : val;
-                if (Dep.target) {
-                    dep.depend();
-                    if (childOb) {
-                        childOb.dep.depend();
-                        if (Array.isArray(value)) {
-                            dependArray(value);
-                        }
-                    }
-                }
-                return value
-            },
-            set: function reactiveSetter(newVal) {
-                var value = getter ? getter.call(obj) : val;
-                /* eslint-disable no-self-compare */
-                if (newVal === value || (newVal !== newVal && value !== value)) {
-                    return
-                }
-                /* eslint-enable no-self-compare */
-                if ("development" !== 'production' && customSetter) {
-                    customSetter();
-                }
-                if (setter) {
-                    setter.call(obj, newVal);
-                } else {
-                    val = newVal;
-                }
-                childOb = !shallow && observe(newVal);
-                dep.notify();
-            }
-        });
-    }
-
-    /**
-     * Set a property on an object. Adds the new property and
-     * triggers change notification if the property doesn't
-     * already exist.
-     */
-    function set(target, key, val) {
-        if (Array.isArray(target) && isValidArrayIndex(key)) {
-            target.length = Math.max(target.length, key);
-            target.splice(key, 1, val);
-            return val
-        }
-        if (hasOwn(target, key)) {
-            target[key] = val;
-            return val
-        }
-        var ob = (target).__ob__;
-        if (target._isVue || (ob && ob.vmCount)) {
-            "development" !== 'production' && warn(
-                'Avoid adding reactive properties to a Vue instance or its root $data ' +
-                'at runtime - declare it upfront in the data option.'
-            );
-            return val
-        }
-        if (!ob) {
-            target[key] = val;
-            return val
-        }
-        defineReactive(ob.value, key, val);
-        ob.dep.notify();
-        return val
-    }
-
-    /**
-     * Delete a property and trigger change if necessary.
-     */
-    function del(target, key) {
-        if (Array.isArray(target) && isValidArrayIndex(key)) {
-            target.splice(key, 1);
-            return
-        }
-        var ob = (target).__ob__;
-        if (target._isVue || (ob && ob.vmCount)) {
-            "development" !== 'production' && warn(
-                'Avoid deleting properties on a Vue instance or its root $data ' +
-                '- just set it to null.'
-            );
-            return
-        }
-        if (!hasOwn(target, key)) {
-            return
-        }
-        delete target[key];
-        if (!ob) {
-            return
-        }
-        ob.dep.notify();
-    }
-
-    /**
-     * Collect dependencies on array elements when the array is touched, since
-     * we cannot intercept array element access like property getters.
-     */
-    function dependArray(value) {
-        for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-            e = value[i];
-            e && e.__ob__ && e.__ob__.dep.depend();
-            if (Array.isArray(e)) {
-                dependArray(e);
-            }
-        }
-    }
-
-    /*  */
-
-    /**
-     * Option overwriting strategies are functions that handle
-     * how to merge a parent option value and a child option
-     * value into the final value.
-     */
-    var strats = config.optionMergeStrategies;
-
-    /**
-     * Options with restrictions
-     */
-    {
-        strats.el = strats.propsData = function (parent, child, vm, key) {
-            if (!vm) {
-                warn(
-                    "option \"" + key + "\" can only be used during instance " +
-                    'creation with the `new` keyword.'
-                );
-            }
-            return defaultStrat(parent, child)
-        };
-    }
-
-    /**
-     * Helper that recursively merges two data objects together.
-     */
-    function mergeData(to, from) {
-        if (!from) { return to }
-        var key, toVal, fromVal;
-        var keys = Object.keys(from);
-        for (var i = 0; i < keys.length; i++) {
-            key = keys[i];
-            toVal = to[key];
-            fromVal = from[key];
-            if (!hasOwn(to, key)) {
-                set(to, key, fromVal);
-            } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-                mergeData(toVal, fromVal);
-            }
-        }
-        return to
-    }
-
-    /**
-     * Data
-     */
-    function mergeDataOrFn(
-        parentVal,
-        childVal,
-        vm
-    ) {
-        if (!vm) {
-            // in a Vue.extend merge, both should be functions
-            if (!childVal) {
-                return parentVal
-            }
-            if (!parentVal) {
-                return childVal
-            }
-            // when parentVal & childVal are both present,
-            // we need to return a function that returns the
-            // merged result of both functions... no need to
-            // check if parentVal is a function here because
-            // it has to be a function to pass previous merges.
-            return function mergedDataFn() {
-                return mergeData(
-                    typeof childVal === 'function' ? childVal.call(this) : childVal,
-                    typeof parentVal === 'function' ? parentVal.call(this) : parentVal
-                )
-            }
-        } else if (parentVal || childVal) {
-            return function mergedInstanceDataFn() {
-                // instance merge
-                var instanceData = typeof childVal === 'function'
-                    ? childVal.call(vm)
-                    : childVal;
-                var defaultData = typeof parentVal === 'function'
-                    ? parentVal.call(vm)
-                    : parentVal;
-                if (instanceData) {
-                    return mergeData(instanceData, defaultData)
-                } else {
-                    return defaultData
-                }
-            }
-        }
-    }
-
-    strats.data = function (
-        parentVal,
-        childVal,
-        vm
-    ) {
-        if (!vm) {
-            if (childVal && typeof childVal !== 'function') {
-                "development" !== 'production' && warn(
-                    'The "data" option should be a function ' +
-                    'that returns a per-instance value in component ' +
-                    'definitions.',
-                    vm
-                );
-
-                return parentVal
-            }
-            return mergeDataOrFn.call(this, parentVal, childVal)
-        }
-
-        return mergeDataOrFn(parentVal, childVal, vm)
-    };
-
-    /**
-     * Hooks and props are merged as arrays.
-     */
-    function mergeHook(
-        parentVal,
-        childVal
-    ) {
-        return childVal
-            ? parentVal
-                ? parentVal.concat(childVal)
-                : Array.isArray(childVal)
-                    ? childVal
-                    : [childVal]
-            : parentVal
-    }
-
-    LIFECYCLE_HOOKS.forEach(function (hook) {
-        strats[hook] = mergeHook;
-    });
-
-    /**
-     * Assets
-     *
-     * When a vm is present (instance creation), we need to do
-     * a three-way merge between constructor options, instance
-     * options and parent options.
-     */
-    function mergeAssets(
-        parentVal,
-        childVal,
-        vm,
-        key
-    ) {
-        var res = Object.create(parentVal || null);
-        if (childVal) {
-            "development" !== 'production' && assertObjectType(key, childVal, vm);
-            return extend(res, childVal)
-        } else {
-            return res
-        }
-    }
-
-    ASSET_TYPES.forEach(function (type) {
-        strats[type + 's'] = mergeAssets;
-    });
-
-    /**
-     * Watchers.
-     *
-     * Watchers hashes should not overwrite one
-     * another, so we merge them as arrays.
-     */
-    strats.watch = function (
-        parentVal,
-        childVal,
-        vm,
-        key
-    ) {
-        // work around Firefox's Object.prototype.watch...
-        if (parentVal === nativeWatch) { parentVal = undefined; }
-        if (childVal === nativeWatch) { childVal = undefined; }
-        /* istanbul ignore if */
-        if (!childVal) { return Object.create(parentVal || null) }
-        {
-            assertObjectType(key, childVal, vm);
-        }
-        if (!parentVal) { return childVal }
-        var ret = {};
-        extend(ret, parentVal);
-        for (var key$1 in childVal) {
-            var parent = ret[key$1];
-            var child = childVal[key$1];
-            if (parent && !Array.isArray(parent)) {
-                parent = [parent];
-            }
-            ret[key$1] = parent
-                ? parent.concat(child)
-                : Array.isArray(child) ? child : [child];
-        }
-        return ret
-    };
-
-    /**
-     * Other object hashes.
-     */
-    strats.props =
-        strats.methods =
-        strats.inject =
-        strats.computed = function (
-            parentVal,
-            childVal,
-            vm,
-            key
-        ) {
-            if (childVal && "development" !== 'production') {
-                assertObjectType(key, childVal, vm);
-            }
-            if (!parentVal) { return childVal }
-            var ret = Object.create(null);
-            extend(ret, parentVal);
-            if (childVal) { extend(ret, childVal); }
-            return ret
-        };
-    strats.provide = mergeDataOrFn;
-
-    /**
-     * Default strategy.
-     */
-    var defaultStrat = function (parentVal, childVal) {
-        return childVal === undefined
-            ? parentVal
-            : childVal
-    };
-
-    /**
-     * Validate component names
-     */
-    function checkComponents(options) {
-        for (var key in options.components) {
-            var lower = key.toLowerCase();
-            if (isBuiltInTag(lower) || config.isReservedTag(lower)) {
-                warn(
-                    'Do not use built-in or reserved HTML elements as component ' +
-                    'id: ' + key
-                );
-            }
-        }
-    }
-
-    /**
-     * Ensure all props option syntax are normalized into the
-     * Object-based format.
-     */
-    function normalizeProps(options, vm) {
-        var props = options.props;
-        if (!props) { return }
-        var res = {};
-        var i, val, name;
-        if (Array.isArray(props)) {
-            i = props.length;
-            while (i--) {
-                val = props[i];
-                if (typeof val === 'string') {
-                    name = camelize(val);
-                    res[name] = { type: null };
-                } else {
-                    warn('props must be strings when using array syntax.');
-                }
-            }
-        } else if (isPlainObject(props)) {
-            for (var key in props) {
-                val = props[key];
-                name = camelize(key);
-                res[name] = isPlainObject(val)
-                    ? val
-                    : { type: val };
-            }
-        } else {
-            warn(
-                "Invalid value for option \"props\": expected an Array or an Object, " +
-                "but got " + (toRawType(props)) + ".",
-                vm
-            );
-        }
-        options.props = res;
-    }
-
-    /**
-     * Normalize all injections into Object-based format
-     */
-    function normalizeInject(options, vm) {
-        var inject = options.inject;
-        var normalized = options.inject = {};
-        if (Array.isArray(inject)) {
-            for (var i = 0; i < inject.length; i++) {
-                normalized[inject[i]] = { from: inject[i] };
-            }
-        } else if (isPlainObject(inject)) {
-            for (var key in inject) {
-                var val = inject[key];
-                normalized[key] = isPlainObject(val)
-                    ? extend({ from: key }, val)
-                    : { from: val };
-            }
-        } else if ("development" !== 'production' && inject) {
-            warn(
-                "Invalid value for option \"inject\": expected an Array or an Object, " +
-                "but got " + (toRawType(inject)) + ".",
-                vm
-            );
-        }
-    }
-
-    /**
-     * Normalize raw function directives into object format.
-     */
-    function normalizeDirectives(options) {
-        var dirs = options.directives;
-        if (dirs) {
-            for (var key in dirs) {
-                var def = dirs[key];
-                if (typeof def === 'function') {
-                    dirs[key] = { bind: def, update: def };
-                }
-            }
-        }
-    }
-
-    function assertObjectType(name, value, vm) {
-        if (!isPlainObject(value)) {
-            warn(
-                "Invalid value for option \"" + name + "\": expected an Object, " +
-                "but got " + (toRawType(value)) + ".",
-                vm
-            );
-        }
-    }
-
-    /**
-     * Merge two option objects into a new one.
-     * Core utility used in both instantiation and inheritance.
-     */
-    function mergeOptions(
-        parent,
-        child,
-        vm
-    ) {
-        {
-            checkComponents(child);
-        }
-
-        if (typeof child === 'function') {
-            child = child.options;
-        }
-
-        normalizeProps(child, vm);
-        normalizeInject(child, vm);
-        normalizeDirectives(child);
-        var extendsFrom = child.extends;
-        if (extendsFrom) {
-            parent = mergeOptions(parent, extendsFrom, vm);
-        }
-        if (child.mixins) {
-            for (var i = 0, l = child.mixins.length; i < l; i++) {
-                parent = mergeOptions(parent, child.mixins[i], vm);
-            }
-        }
-        var options = {};
-        var key;
-        for (key in parent) {
-            mergeField(key);
-        }
-        for (key in child) {
-            if (!hasOwn(parent, key)) {
-                mergeField(key);
-            }
-        }
-        function mergeField(key) {
-            var strat = strats[key] || defaultStrat;
-            options[key] = strat(parent[key], child[key], vm, key);
-        }
-        return options
-    }
-
-    /**
-     * Resolve an asset.
-     * This function is used because child instances need access
-     * to assets defined in its ancestor chain.
-     */
-    function resolveAsset(
-        options,
-        type,
-        id,
-        warnMissing
-    ) {
-        /* istanbul ignore if */
-        if (typeof id !== 'string') {
-            return
-        }
-        var assets = options[type];
-        // check local registration variations first
-        if (hasOwn(assets, id)) { return assets[id] }
-        var camelizedId = camelize(id);
-        if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-        var PascalCaseId = capitalize(camelizedId);
-        if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-        // fallback to prototype chain
-        var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-        if ("development" !== 'production' && warnMissing && !res) {
-            warn(
-                'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-                options
-            );
-        }
-        return res
-    }
-
-    /*  */
-
-    function validateProp(
-        key,
-        propOptions,
-        propsData,
-        vm
-    ) {
-        var prop = propOptions[key];
-        var absent = !hasOwn(propsData, key);
-        var value = propsData[key];
-        // handle boolean props
-        if (isType(Boolean, prop.type)) {
-            if (absent && !hasOwn(prop, 'default')) {
-                value = false;
-            } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-                value = true;
-            }
-        }
-        // check default value
-        if (value === undefined) {
-            value = getPropDefaultValue(vm, prop, key);
-            // since the default value is a fresh copy,
-            // make sure to observe it.
-            var prevShouldConvert = observerState.shouldConvert;
-            observerState.shouldConvert = true;
-            observe(value);
-            observerState.shouldConvert = prevShouldConvert;
-        }
-        {
-            assertProp(prop, key, value, vm, absent);
-        }
-        return value
-    }
-
-    /**
-     * Get the default value of a prop.
-     */
-    function getPropDefaultValue(vm, prop, key) {
-        // no default, return undefined
-        if (!hasOwn(prop, 'default')) {
-            return undefined
-        }
-        var def = prop.default;
-        // warn against non-factory defaults for Object & Array
-        if ("development" !== 'production' && isObject(def)) {
-            warn(
-                'Invalid default value for prop "' + key + '": ' +
-                'Props with type Object/Array must use a factory function ' +
-                'to return the default value.',
-                vm
-            );
-        }
-        // the raw prop value was also undefined from previous render,
-        // return previous default value to avoid unnecessary watcher trigger
-        if (vm && vm.$options.propsData &&
-            vm.$options.propsData[key] === undefined &&
-            vm._props[key] !== undefined
-        ) {
-            return vm._props[key]
-        }
-        // call factory function for non-Function types
-        // a value is Function if its prototype is function even across different execution context
-        return typeof def === 'function' && getType(prop.type) !== 'Function'
-            ? def.call(vm)
-            : def
-    }
-
-    /**
-     * Assert whether a prop is valid.
-     */
-    function assertProp(
-        prop,
-        name,
-        value,
-        vm,
-        absent
-    ) {
-        if (prop.required && absent) {
-            warn(
-                'Missing required prop: "' + name + '"',
-                vm
-            );
-            return
-        }
-        if (value == null && !prop.required) {
-            return
-        }
-        var type = prop.type;
-        var valid = !type || type === true;
-        var expectedTypes = [];
-        if (type) {
-            if (!Array.isArray(type)) {
-                type = [type];
-            }
-            for (var i = 0; i < type.length && !valid; i++) {
-                var assertedType = assertType(value, type[i]);
-                expectedTypes.push(assertedType.expectedType || '');
-                valid = assertedType.valid;
-            }
-        }
-        if (!valid) {
-            warn(
-                "Invalid prop: type check failed for prop \"" + name + "\"." +
-                " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-                ", got " + (toRawType(value)) + ".",
-                vm
-            );
-            return
-        }
-        var validator = prop.validator;
-        if (validator) {
-            if (!validator(value)) {
-                warn(
-                    'Invalid prop: custom validator check failed for prop "' + name + '".',
-                    vm
-                );
-            }
-        }
-    }
-
-    var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
-
-    function assertType(value, type) {
-        var valid;
-        var expectedType = getType(type);
-        if (simpleCheckRE.test(expectedType)) {
-            var t = typeof value;
-            valid = t === expectedType.toLowerCase();
-            // for primitive wrapper objects
-            if (!valid && t === 'object') {
-                valid = value instanceof type;
-            }
-        } else if (expectedType === 'Object') {
-            valid = isPlainObject(value);
-        } else if (expectedType === 'Array') {
-            valid = Array.isArray(value);
-        } else {
-            valid = value instanceof type;
-        }
-        return {
-            valid: valid,
-            expectedType: expectedType
-        }
-    }
-
-    /**
-     * Use function string name to check built-in types,
-     * because a simple equality check will fail when running
-     * across different vms / iframes.
-     */
-    function getType(fn) {
-        var match = fn && fn.toString().match(/^\s*function (\w+)/);
-        return match ? match[1] : ''
-    }
-
-    function isType(type, fn) {
-        if (!Array.isArray(fn)) {
-            return getType(fn) === getType(type)
-        }
-        for (var i = 0, len = fn.length; i < len; i++) {
-            if (getType(fn[i]) === getType(type)) {
-                return true
-            }
-        }
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
         /* istanbul ignore next */
         return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured'
+];
+
+/*  */
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: "development" !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: "development" !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = /[^\w.$]/;
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = (function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+{
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm || {};
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
     }
 
-    /*  */
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
 
-    var mark;
-    var measure;
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
 
-    {
-        var perf = inBrowser && window.performance;
-        /* istanbul ignore if */
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// the current target watcher being evaluated.
+// this is globally unique because there could be only one
+// watcher being evaluated at any time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (_target) {
+  if (Dep.target) { targetStack.push(Dep.target); }
+  Dep.target = _target;
+}
+
+function popTarget () {
+  Dep.target = targetStack.pop();
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode, deep) {
+  var componentOptions = vnode.componentOptions;
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    vnode.children,
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.isCloned = true;
+  if (deep) {
+    if (vnode.children) {
+      cloned.children = cloneVNodes(vnode.children, true);
+    }
+    if (componentOptions && componentOptions.children) {
+      componentOptions.children = cloneVNodes(componentOptions.children, true);
+    }
+  }
+  return cloned
+}
+
+function cloneVNodes (vnodes, deep) {
+  var len = vnodes.length;
+  var res = new Array(len);
+  for (var i = 0; i < len; i++) {
+    res[i] = cloneVNode(vnodes[i], deep);
+  }
+  return res
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);[
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+].forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * By default, when a reactive property is set, the new value is
+ * also converted to become reactive. However when passing down props,
+ * we don't want to force conversion because the value may be a nested value
+ * under a frozen data structure. Converting it would defeat the optimization.
+ */
+var observerState = {
+  shouldConvert: true
+};
+
+/**
+ * Observer class that are attached to each observed
+ * object. Once attached, the observer converts target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatches updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    var augment = hasProto
+      ? protoAugment
+      : copyAugment;
+    augment(value, arrayMethods, arrayKeys);
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through each property and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive(obj, keys[i], obj[keys[i]]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment an target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src, keys) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment an target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    observerState.shouldConvert &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if ("development" !== 'production' && customSetter) {
+        customSetter();
+      }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    "development" !== 'production' && warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    "development" !== 'production' && warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+{
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+  var keys = Object.keys(from);
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      "development" !== 'production' && warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  return childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    "development" !== 'production' && assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && "development" !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'can only contain alphanumeric characters and the hyphen, ' +
+      'and must start with a letter.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def = dirs[key];
+      if (typeof def === 'function') {
+        dirs[key] = { bind: def, update: def };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+  var extendsFrom = child.extends;
+  if (extendsFrom) {
+    parent = mergeOptions(parent, extendsFrom, vm);
+  }
+  if (child.mixins) {
+    for (var i = 0, l = child.mixins.length; i < l; i++) {
+      parent = mergeOptions(parent, child.mixins[i], vm);
+    }
+  }
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if ("development" !== 'production' && warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // handle boolean props
+  if (isType(Boolean, prop.type)) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
+      value = true;
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldConvert = observerState.shouldConvert;
+    observerState.shouldConvert = true;
+    observe(value);
+    observerState.shouldConvert = prevShouldConvert;
+  }
+  {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if ("development" !== 'production' && isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i]);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+  if (!valid) {
+    warn(
+      "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
+      ", got " + (toRawType(value)) + ".",
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+function assertType (value, type) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    valid = value instanceof type;
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  return match ? match[1] : ''
+}
+
+function isType (type, fn) {
+  if (!Array.isArray(fn)) {
+    return getType(fn) === getType(type)
+  }
+  for (var i = 0, len = fn.length; i < len; i++) {
+    if (getType(fn[i]) === getType(type)) {
+      return true
+    }
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  if (vm) {
+    var cur = vm;
+    while ((cur = cur.$parent)) {
+      var hooks = cur.$options.errorCaptured;
+      if (hooks) {
+        for (var i = 0; i < hooks.length; i++) {
+          try {
+            var capture = hooks[i].call(cur, err, vm, info) === false;
+            if (capture) { return }
+          } catch (e) {
+            globalHandleError(e, cur, 'errorCaptured hook');
+          }
+        }
+      }
+    }
+  }
+  globalHandleError(err, vm, info);
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      logError(e, null, 'config.errorHandler');
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+/* globals MessageChannel */
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using both micro and macro tasks.
+// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
+// micro tasks have too high a priority and fires in between supposedly
+// sequential events (e.g. #4521, #6690) or even between bubbling of the same
+// event (#6566). However, using macro tasks everywhere also has subtle problems
+// when state is changed right before repaint (e.g. #6813, out-in transitions).
+// Here we use micro task by default, but expose a way to force macro task when
+// needed (e.g. in event handlers attached by v-on).
+var microTimerFunc;
+var macroTimerFunc;
+var useMacroTask = false;
+
+// Determine (macro) Task defer implementation.
+// Technically setImmediate should be the ideal choice, but it's only available
+// in IE. The only polyfill that consistently queues the callback after all DOM
+// events triggered in the same loop is by using MessageChannel.
+/* istanbul ignore if */
+if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  macroTimerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else if (typeof MessageChannel !== 'undefined' && (
+  isNative(MessageChannel) ||
+  // PhantomJS
+  MessageChannel.toString() === '[object MessageChannelConstructor]'
+)) {
+  var channel = new MessageChannel();
+  var port = channel.port2;
+  channel.port1.onmessage = flushCallbacks;
+  macroTimerFunc = function () {
+    port.postMessage(1);
+  };
+} else {
+  /* istanbul ignore next */
+  macroTimerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+// Determine MicroTask defer implementation.
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  microTimerFunc = function () {
+    p.then(flushCallbacks);
+    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+} else {
+  // fallback to macro
+  microTimerFunc = macroTimerFunc;
+}
+
+/**
+ * Wrap a function so that if any code inside triggers state change,
+ * the changes are queued using a Task instead of a MicroTask.
+ */
+function withMacroTask (fn) {
+  return fn._withTask || (fn._withTask = function () {
+    useMacroTask = true;
+    var res = fn.apply(null, arguments);
+    useMacroTask = false;
+    return res
+  })
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    if (useMacroTask) {
+      macroTimerFunc();
+    } else {
+      microTimerFunc();
+    }
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+var mark;
+var measure;
+
+{
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      perf.clearMeasures(name);
+    };
+  }
+}
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+{
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' &&
+    Proxy.toString().match(/native code/);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
+      if (!has && !isAllowed) {
+        warnNonPresent(target, key);
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        warnNonPresent(target, key);
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        cloned[i].apply(null, arguments$1);
+      }
+    } else {
+      // return handler return value for single handlers
+      return fns.apply(null, arguments)
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, def, cur, old, event;
+  for (name in on) {
+    def = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    /* istanbul ignore if */
+    if (isUndef(cur)) {
+      "development" !== 'production' && warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur);
+      }
+      add(event.name, cur, event.once, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      {
+        var keyInLowerCase = key.toLowerCase();
         if (
-            perf &&
-            perf.mark &&
-            perf.measure &&
-            perf.clearMarks &&
-            perf.clearMeasures
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
         ) {
-            mark = function (tag) { return perf.mark(tag); };
-            measure = function (name, startTag, endTag) {
-                perf.measure(name, startTag, endTag);
-                perf.clearMarks(startTag);
-                perf.clearMarks(endTag);
-                perf.clearMeasures(name);
-            };
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
         }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
     }
+  }
+  return res
+}
 
-    /* not type checking this file because flow doesn't play well with Proxy */
-
-    var initProxy;
-
-    {
-        var allowedGlobals = makeMap(
-            'Infinity,undefined,NaN,isFinite,isNaN,' +
-            'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-            'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-            'require' // for Webpack/Browserify
-        );
-
-        var warnNonPresent = function (target, key) {
-            warn(
-                "Property or method \"" + key + "\" is not defined on the instance but " +
-                'referenced during render. Make sure that this property is reactive, ' +
-                'either in the data option, or for class-based components, by ' +
-                'initializing the property. ' +
-                'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
-                target
-            );
-        };
-
-        var hasProxy =
-            typeof Proxy !== 'undefined' &&
-            Proxy.toString().match(/native code/);
-
-        if (hasProxy) {
-            var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-            config.keyCodes = new Proxy(config.keyCodes, {
-                set: function set(target, key, value) {
-                    if (isBuiltInModifier(key)) {
-                        warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-                        return false
-                    } else {
-                        target[key] = value;
-                        return true
-                    }
-                }
-            });
-        }
-
-        var hasHandler = {
-            has: function has(target, key) {
-                var has = key in target;
-                var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
-                if (!has && !isAllowed) {
-                    warnNonPresent(target, key);
-                }
-                return has || !isAllowed
-            }
-        };
-
-        var getHandler = {
-            get: function get(target, key) {
-                if (typeof key === 'string' && !(key in target)) {
-                    warnNonPresent(target, key);
-                }
-                return target[key]
-            }
-        };
-
-        initProxy = function initProxy(vm) {
-            if (hasProxy) {
-                // determine which proxy handler to use
-                var options = vm.$options;
-                var handlers = options.render && options.render._withStripped
-                    ? getHandler
-                    : hasHandler;
-                vm._renderProxy = new Proxy(vm, handlers);
-            } else {
-                vm._renderProxy = vm;
-            }
-        };
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
     }
+  }
+  return false
+}
 
-    /*  */
+/*  */
 
-    var normalizeEvent = cached(function (name) {
-        var passive = name.charAt(0) === '&';
-        name = passive ? name.slice(1) : name;
-        var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-        name = once$$1 ? name.slice(1) : name;
-        var capture = name.charAt(0) === '!';
-        name = capture ? name.slice(1) : name;
-        return {
-            name: name,
-            once: once$$1,
-            capture: capture,
-            passive: passive
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
         }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor,
+  context
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (isDef(factory.contexts)) {
+    // already pending
+    factory.contexts.push(context);
+  } else {
+    var contexts = factory.contexts = [context];
+    var sync = true;
+
+    var forceRender = function () {
+      for (var i = 0, l = contexts.length; i < l; i++) {
+        contexts[i].$forceUpdate();
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender();
+      }
     });
 
-    function createFnInvoker(fns) {
-        function invoker() {
-            var arguments$1 = arguments;
+    var reject = once(function (reason) {
+      "development" !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender();
+      }
+    });
 
-            var fns = invoker.fns;
-            if (Array.isArray(fns)) {
-                var cloned = fns.slice();
-                for (var i = 0; i < cloned.length; i++) {
-                    cloned[i].apply(null, arguments$1);
-                }
-            } else {
-                // return handler return value for single handlers
-                return fns.apply(null, arguments)
-            }
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (typeof res.then === 'function') {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
         }
-        invoker.fns = fns;
-        return invoker
+      } else if (isDef(res.component) && typeof res.component.then === 'function') {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            setTimeout(function () {
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender();
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          setTimeout(function () {
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
     }
 
-    function updateListeners(
-        on,
-        oldOn,
-        add,
-        remove$$1,
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn, once) {
+  if (once) {
+    target.$once(event, fn);
+  } else {
+    target.$on(event, fn);
+  }
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var this$1 = this;
+
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        this$1.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var this$1 = this;
+
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        this$1.$off(event[i], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    if (fn) {
+      // specific handler
+      var cb;
+      var i$1 = cbs.length;
+      while (i$1--) {
+        cb = cbs[i$1];
+        if (cb === fn || cb.fn === fn) {
+          cbs.splice(i$1, 1);
+          break
+        }
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        try {
+          cbs[i].apply(vm, args);
+        } catch (e) {
+          handleError(e, vm, ("event handler for \"" + event + "\""));
+        }
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  var slots = {};
+  if (!children) {
+    return slots
+  }
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res
+) {
+  res = res || {};
+  for (var i = 0; i < fns.length; i++) {
+    if (Array.isArray(fns[i])) {
+      resolveScopedSlots(fns[i], res);
+    } else {
+      res[fns[i].key] = fns[i].fn;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    if (vm._isMounted) {
+      callHook(vm, 'beforeUpdate');
+    }
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var prevActiveInstance = activeInstance;
+    activeInstance = vm;
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(
+        vm.$el, vnode, hydrating, false /* removeOnly */,
+        vm.$options._parentElm,
+        vm.$options._refElm
+      );
+      // no need for the ref nodes after initial patch
+      // this prevents keeping a detached DOM tree in memory (#5851)
+      vm.$options._parentElm = vm.$options._refElm = null;
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    activeInstance = prevActiveInstance;
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if ("development" !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren
+  var hasChildren = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    parentVnode.data.scopedSlots || // has new scoped slots
+    vm.$scopedSlots !== emptyObject // has old scoped slots
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    observerState.shouldConvert = false;
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      props[key] = validateProp(key, vm.$options.props, propsData, vm);
+    }
+    observerState.shouldConvert = true;
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  if (listeners) {
+    var oldListeners = vm.$options._parentListeners;
+    vm.$options._parentListeners = listeners;
+    updateComponentListeners(vm, listeners, oldListeners);
+  }
+  // resolve slots + force update if has children
+  if (hasChildren) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  var handlers = vm.$options[hook];
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      try {
+        handlers[i].call(vm);
+      } catch (e) {
+        handleError(e, vm, (hook + " hook"));
+      }
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+}
+
+/*  */
+
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if ("development" !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = expOrFn.toString();
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = function () {};
+      "development" !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
         vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+    var this$1 = this;
+
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this$1.deps[i];
+    if (!this$1.newDepIds.has(dep.id)) {
+      dep.removeSub(this$1);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
     ) {
-        var name, cur, old, event;
-        for (name in on) {
-            cur = on[name];
-            old = oldOn[name];
-            event = normalizeEvent(name);
-            if (isUndef(cur)) {
-                "development" !== 'production' && warn(
-                    "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
-                    vm
-                );
-            } else if (isUndef(old)) {
-                if (isUndef(cur.fns)) {
-                    cur = on[name] = createFnInvoker(cur);
-                }
-                add(event.name, cur, event.once, event.capture, event.passive);
-            } else if (cur !== old) {
-                old.fns = cur;
-                on[name] = old;
-            }
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
         }
-        for (name in oldOn) {
-            if (isUndef(on[name])) {
-                event = normalizeEvent(name);
-                remove$$1(event.name, oldOn[name], event.capture);
-            }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+    var this$1 = this;
+
+  var i = this.deps.length;
+  while (i--) {
+    this$1.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+    var this$1 = this;
+
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this$1.deps[i].removeSub(this$1);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  observerState.shouldConvert = isRoot;
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive(props, key, value, function () {
+        if (vm.$parent && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
         }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  observerState.shouldConvert = true;
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    "development" !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      "development" !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if ("development" !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
     }
 
-    /*  */
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
 
-    function mergeVNodeHook(def, hookKey, hook) {
-        var invoker;
-        var oldHook = def[hookKey];
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
+  }
+}
 
-        function wrappedHook() {
-            hook.apply(this, arguments);
-            // important: remove merged hook to ensure it's called only once
-            // and prevent memory leak
-            remove(invoker.fns, wrappedHook);
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : userDef;
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : userDef.get
+      : noop;
+    sharedPropertyDefinition.set = userDef.set
+      ? userDef.set
+      : noop;
+  }
+  if ("development" !== 'production' &&
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    {
+      if (methods[key] == null) {
+        warn(
+          "Method \"" + key + "\" has an undefined value in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  keyOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(keyOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function (newData) {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      cb.call(vm, watcher.value);
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    observerState.shouldConvert = false;
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      {
+        defineReactive(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      }
+    });
+    observerState.shouldConvert = true;
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject).filter(function (key) {
+        /* istanbul ignore next */
+        return Object.getOwnPropertyDescriptor(inject, key).enumerable
+      })
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && provideKey in source._provided) {
+          result[key] = source._provided[provideKey];
+          break
         }
-
-        if (isUndef(oldHook)) {
-            // no existing hook
-            invoker = createFnInvoker([wrappedHook]);
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
         } else {
-            /* istanbul ignore if */
-            if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
-                // already a merged invoker
-                invoker = oldHook;
-                invoker.fns.push(wrappedHook);
-            } else {
-                // existing plain hook
-                invoker = createFnInvoker([oldHook, wrappedHook]);
-            }
+          warn(("Injection \"" + key + "\" not found"), vm);
         }
-
-        invoker.merged = true;
-        def[hookKey] = invoker;
+      }
     }
+    return result
+  }
+}
 
-    /*  */
+/*  */
 
-    function extractPropsFromVNodeData(
-        data,
-        Ctor,
-        tag
-    ) {
-        // we are only extracting raw values here.
-        // validation and default values are handled in the child
-        // component itself.
-        var propOptions = Ctor.options.props;
-        if (isUndef(propOptions)) {
-            return
-        }
-        var res = {};
-        var attrs = data.attrs;
-        var props = data.props;
-        if (isDef(attrs) || isDef(props)) {
-            for (var key in propOptions) {
-                var altKey = hyphenate(key);
-                {
-                    var keyInLowerCase = key.toLowerCase();
-                    if (
-                        key !== keyInLowerCase &&
-                        attrs && hasOwn(attrs, keyInLowerCase)
-                    ) {
-                        tip(
-                            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-                            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-                            " \"" + key + "\". " +
-                            "Note that HTML attributes are case-insensitive and camelCased " +
-                            "props need to use their kebab-case equivalents when using in-DOM " +
-                            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
-                        );
-                    }
-                }
-                checkProp(res, props, key, altKey, true) ||
-                    checkProp(res, attrs, key, altKey, false);
-            }
-        }
-        return res
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
     }
-
-    function checkProp(
-        res,
-        hash,
-        key,
-        altKey,
-        preserve
-    ) {
-        if (isDef(hash)) {
-            if (hasOwn(hash, key)) {
-                res[key] = hash[key];
-                if (!preserve) {
-                    delete hash[key];
-                }
-                return true
-            } else if (hasOwn(hash, altKey)) {
-                res[key] = hash[altKey];
-                if (!preserve) {
-                    delete hash[altKey];
-                }
-                return true
-            }
-        }
-        return false
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
     }
-
-    /*  */
-
-    // The template compiler attempts to minimize the need for normalization by
-    // statically analyzing the template at compile time.
-    //
-    // For plain HTML markup, normalization can be completely skipped because the
-    // generated render function is guaranteed to return Array<VNode>. There are
-    // two cases where extra normalization is needed:
-
-    // 1. When the children contains components - because a functional component
-    // may return an Array instead of a single root. In this case, just a simple
-    // normalization is needed - if any child is an Array, we flatten the whole
-    // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-    // because functional components already normalize their own children.
-    function simpleNormalizeChildren(children) {
-        for (var i = 0; i < children.length; i++) {
-            if (Array.isArray(children[i])) {
-                return Array.prototype.concat.apply([], children)
-            }
-        }
-        return children
+  } else if (isObject(val)) {
+    keys = Object.keys(val);
+    ret = new Array(keys.length);
+    for (i = 0, l = keys.length; i < l; i++) {
+      key = keys[i];
+      ret[i] = render(val[key], key, i);
     }
+  }
+  if (isDef(ret)) {
+    (ret)._isVList = true;
+  }
+  return ret
+}
 
-    // 2. When the children contains constructs that always generated nested Arrays,
-    // e.g. <template>, <slot>, v-for, or when the children is provided by user
-    // with hand-written render functions / JSX. In such cases a full normalization
-    // is needed to cater to all possible types of children values.
-    function normalizeChildren(children) {
-        return isPrimitive(children)
-            ? [createTextVNode(children)]
-            : Array.isArray(children)
-                ? normalizeArrayChildren(children)
-                : undefined
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if ("development" !== 'production' && !isObject(bindObject)) {
+        warn(
+          'slot v-bind without argument expects an Object',
+          this
+        );
+      }
+      props = extend(extend({}, bindObject), props);
     }
-
-    function isTextNode(node) {
-        return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+    nodes = scopedSlotFn(props) || fallback;
+  } else {
+    var slotNodes = this.$slots[name];
+    // warn duplicate slot usage
+    if (slotNodes) {
+      if ("development" !== 'production' && slotNodes._rendered) {
+        warn(
+          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
+          "- this will likely cause render errors.",
+          this
+        );
+      }
+      slotNodes._rendered = true;
     }
+    nodes = slotNodes || fallback;
+  }
 
-    function normalizeArrayChildren(children, nestedIndex) {
-        var res = [];
-        var i, c, lastIndex, last;
-        for (i = 0; i < children.length; i++) {
-            c = children[i];
-            if (isUndef(c) || typeof c === 'boolean') { continue }
-            lastIndex = res.length - 1;
-            last = res[lastIndex];
-            //  nested
-            if (Array.isArray(c)) {
-                if (c.length > 0) {
-                    c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-                    // merge adjacent text nodes
-                    if (isTextNode(c[0]) && isTextNode(last)) {
-                        res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-                        c.shift();
-                    }
-                    res.push.apply(res, c);
-                }
-            } else if (isPrimitive(c)) {
-                if (isTextNode(last)) {
-                    // merge adjacent text nodes
-                    // this is necessary for SSR hydration because text nodes are
-                    // essentially merged when rendered to HTML strings
-                    res[lastIndex] = createTextVNode(last.text + c);
-                } else if (c !== '') {
-                    // convert primitive to vnode
-                    res.push(createTextVNode(c));
-                }
-            } else {
-                if (isTextNode(c) && isTextNode(last)) {
-                    // merge adjacent text nodes
-                    res[lastIndex] = createTextVNode(last.text + c.text);
-                } else {
-                    // default key for nested array children (likely generated by v-for)
-                    if (isTrue(children._isVList) &&
-                        isDef(c.tag) &&
-                        isUndef(c.key) &&
-                        isDef(nestedIndex)) {
-                        c.key = "__vlist" + nestedIndex + "_" + i + "__";
-                    }
-                    res.push(c);
-                }
-            }
-        }
-        return res
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInAlias,
+  eventKeyName
+) {
+  var keyCodes = config.keyCodes[key] || builtInAlias;
+  if (keyCodes) {
+    if (Array.isArray(keyCodes)) {
+      return keyCodes.indexOf(eventKeyCode) === -1
+    } else {
+      return keyCodes !== eventKeyCode
     }
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+}
 
-    /*  */
+/*  */
 
-    function ensureCtor(comp, base) {
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      "development" !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
         if (
-            comp.__esModule ||
-            (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
         ) {
-            comp = comp.default;
-        }
-        return isObject(comp)
-            ? base.extend(comp)
-            : comp
-    }
-
-    function createAsyncPlaceholder(
-        factory,
-        data,
-        context,
-        children,
-        tag
-    ) {
-        var node = createEmptyVNode();
-        node.asyncFactory = factory;
-        node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-        return node
-    }
-
-    function resolveAsyncComponent(
-        factory,
-        baseCtor,
-        context
-    ) {
-        if (isTrue(factory.error) && isDef(factory.errorComp)) {
-            return factory.errorComp
-        }
-
-        if (isDef(factory.resolved)) {
-            return factory.resolved
-        }
-
-        if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-            return factory.loadingComp
-        }
-
-        if (isDef(factory.contexts)) {
-            // already pending
-            factory.contexts.push(context);
+          hash = data;
         } else {
-            var contexts = factory.contexts = [context];
-            var sync = true;
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        if (!(key in hash)) {
+          hash[key] = value[key];
 
-            var forceRender = function () {
-                for (var i = 0, l = contexts.length; i < l; i++) {
-                    contexts[i].$forceUpdate();
-                }
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
             };
-
-            var resolve = once(function (res) {
-                // cache resolved
-                factory.resolved = ensureCtor(res, baseCtor);
-                // invoke callbacks only if this is not a synchronous resolve
-                // (async resolves are shimmed as synchronous during SSR)
-                if (!sync) {
-                    forceRender();
-                }
-            });
-
-            var reject = once(function (reason) {
-                "development" !== 'production' && warn(
-                    "Failed to resolve async component: " + (String(factory)) +
-                    (reason ? ("\nReason: " + reason) : '')
-                );
-                if (isDef(factory.errorComp)) {
-                    factory.error = true;
-                    forceRender();
-                }
-            });
-
-            var res = factory(resolve, reject);
-
-            if (isObject(res)) {
-                if (typeof res.then === 'function') {
-                    // () => Promise
-                    if (isUndef(factory.resolved)) {
-                        res.then(resolve, reject);
-                    }
-                } else if (isDef(res.component) && typeof res.component.then === 'function') {
-                    res.component.then(resolve, reject);
-
-                    if (isDef(res.error)) {
-                        factory.errorComp = ensureCtor(res.error, baseCtor);
-                    }
-
-                    if (isDef(res.loading)) {
-                        factory.loadingComp = ensureCtor(res.loading, baseCtor);
-                        if (res.delay === 0) {
-                            factory.loading = true;
-                        } else {
-                            setTimeout(function () {
-                                if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                                    factory.loading = true;
-                                    forceRender();
-                                }
-                            }, res.delay || 200);
-                        }
-                    }
-
-                    if (isDef(res.timeout)) {
-                        setTimeout(function () {
-                            if (isUndef(factory.resolved)) {
-                                reject(
-                                    "timeout (" + (res.timeout) + "ms)"
-                                );
-                            }
-                        }, res.timeout);
-                    }
-                }
-            }
-
-            sync = false;
-            // return in case resolved synchronously
-            return factory.loading
-                ? factory.loadingComp
-                : factory.resolved
+          }
         }
+      };
+
+      for (var key in value) loop( key );
     }
+  }
+  return data
+}
 
-    /*  */
+/*  */
 
-    function isAsyncPlaceholder(node) {
-        return node.isComment && node.asyncFactory
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree by doing a shallow clone.
+  if (tree && !isInFor) {
+    return Array.isArray(tree)
+      ? cloneVNodes(tree)
+      : cloneVNode(tree)
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
     }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
 
-    /*  */
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
 
-    function getFirstComponentChild(children) {
-        if (Array.isArray(children)) {
-            for (var i = 0; i < children.length; i++) {
-                var c = children[i];
-                if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-                    return c
-                }
-            }
-        }
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      "development" !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
     }
+  }
+  return data
+}
 
-    /*  */
+/*  */
 
-    /*  */
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+}
 
-    function initEvents(vm) {
-        vm._events = Object.create(null);
-        vm._hasHookEvent = false;
-        // init parent attached events
-        var listeners = vm.$options._parentListeners;
-        if (listeners) {
-            updateComponentListeners(vm, listeners);
-        }
-    }
+/*  */
 
-    var target;
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var options = Ctor.options;
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () { return resolveSlots(children, parent); };
 
-    function add(event, fn, once) {
-        if (once) {
-            target.$once(event, fn);
-        } else {
-            target.$on(event, fn);
-        }
-    }
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm = Object.create(parent);
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
 
-    function remove$1(event, fn) {
-        target.$off(event, fn);
-    }
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = data.scopedSlots || emptyObject;
+  }
 
-    function updateComponentListeners(
-        vm,
-        listeners,
-        oldListeners
-    ) {
-        target = vm;
-        updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-    }
-
-    function eventsMixin(Vue) {
-        var hookRE = /^hook:/;
-        Vue.prototype.$on = function (event, fn) {
-            var this$1 = this;
-
-            var vm = this;
-            if (Array.isArray(event)) {
-                for (var i = 0, l = event.length; i < l; i++) {
-                    this$1.$on(event[i], fn);
-                }
-            } else {
-                (vm._events[event] || (vm._events[event] = [])).push(fn);
-                // optimize hook:event cost by using a boolean flag marked at registration
-                // instead of a hash lookup
-                if (hookRE.test(event)) {
-                    vm._hasHookEvent = true;
-                }
-            }
-            return vm
-        };
-
-        Vue.prototype.$once = function (event, fn) {
-            var vm = this;
-            function on() {
-                vm.$off(event, on);
-                fn.apply(vm, arguments);
-            }
-            on.fn = fn;
-            vm.$on(event, on);
-            return vm
-        };
-
-        Vue.prototype.$off = function (event, fn) {
-            var this$1 = this;
-
-            var vm = this;
-            // all
-            if (!arguments.length) {
-                vm._events = Object.create(null);
-                return vm
-            }
-            // array of events
-            if (Array.isArray(event)) {
-                for (var i = 0, l = event.length; i < l; i++) {
-                    this$1.$off(event[i], fn);
-                }
-                return vm
-            }
-            // specific event
-            var cbs = vm._events[event];
-            if (!cbs) {
-                return vm
-            }
-            if (arguments.length === 1) {
-                vm._events[event] = null;
-                return vm
-            }
-            if (fn) {
-                // specific handler
-                var cb;
-                var i$1 = cbs.length;
-                while (i$1--) {
-                    cb = cbs[i$1];
-                    if (cb === fn || cb.fn === fn) {
-                        cbs.splice(i$1, 1);
-                        break
-                    }
-                }
-            }
-            return vm
-        };
-
-        Vue.prototype.$emit = function (event) {
-            var vm = this;
-            {
-                var lowerCaseEvent = event.toLowerCase();
-                if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-                    tip(
-                        "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-                        (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-                        "Note that HTML attributes are case-insensitive and you cannot use " +
-                        "v-on to listen to camelCase events when using in-DOM templates. " +
-                        "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-                    );
-                }
-            }
-            var cbs = vm._events[event];
-            if (cbs) {
-                cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-                var args = toArray(arguments, 1);
-                for (var i = 0, l = cbs.length; i < l; i++) {
-                    try {
-                        cbs[i].apply(vm, args);
-                    } catch (e) {
-                        handleError(e, vm, ("event handler for \"" + event + "\""));
-                    }
-                }
-            }
-            return vm
-        };
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for resolving raw children VNodes into a slot object.
-     */
-    function resolveSlots(
-        children,
-        context
-    ) {
-        var slots = {};
-        if (!children) {
-            return slots
-        }
-        var defaultSlot = [];
-        for (var i = 0, l = children.length; i < l; i++) {
-            var child = children[i];
-            var data = child.data;
-            // remove slot attribute if the node is resolved as a Vue slot node
-            if (data && data.attrs && data.attrs.slot) {
-                delete data.attrs.slot;
-            }
-            // named slots should only be respected if the vnode was rendered in the
-            // same context.
-            if ((child.context === context || child.functionalContext === context) &&
-                data && data.slot != null
-            ) {
-                var name = child.data.slot;
-                var slot = (slots[name] || (slots[name] = []));
-                if (child.tag === 'template') {
-                    slot.push.apply(slot, child.children);
-                } else {
-                    slot.push(child);
-                }
-            } else {
-                defaultSlot.push(child);
-            }
-        }
-        // ignore whitespace
-        if (!defaultSlot.every(isWhitespace)) {
-            slots.default = defaultSlot;
-        }
-        return slots
-    }
-
-    function isWhitespace(node) {
-        return node.isComment || node.text === ' '
-    }
-
-    function resolveScopedSlots(
-        fns, // see flow/vnode
-        res
-    ) {
-        res = res || {};
-        for (var i = 0; i < fns.length; i++) {
-            if (Array.isArray(fns[i])) {
-                resolveScopedSlots(fns[i], res);
-            } else {
-                res[fns[i].key] = fns[i].fn;
-            }
-        }
-        return res
-    }
-
-    /*  */
-
-    var activeInstance = null;
-    var isUpdatingChildComponent = false;
-
-    function initLifecycle(vm) {
-        var options = vm.$options;
-
-        // locate first non-abstract parent
-        var parent = options.parent;
-        if (parent && !options.abstract) {
-            while (parent.$options.abstract && parent.$parent) {
-                parent = parent.$parent;
-            }
-            parent.$children.push(vm);
-        }
-
-        vm.$parent = parent;
-        vm.$root = parent ? parent.$root : vm;
-
-        vm.$children = [];
-        vm.$refs = {};
-
-        vm._watcher = null;
-        vm._inactive = null;
-        vm._directInactive = false;
-        vm._isMounted = false;
-        vm._isDestroyed = false;
-        vm._isBeingDestroyed = false;
-    }
-
-    function lifecycleMixin(Vue) {
-        Vue.prototype._update = function (vnode, hydrating) {
-            var vm = this;
-            if (vm._isMounted) {
-                callHook(vm, 'beforeUpdate');
-            }
-            var prevEl = vm.$el;
-            var prevVnode = vm._vnode;
-            var prevActiveInstance = activeInstance;
-            activeInstance = vm;
-            vm._vnode = vnode;
-            // Vue.prototype.__patch__ is injected in entry points
-            // based on the rendering backend used.
-            if (!prevVnode) {
-                // initial render
-                vm.$el = vm.__patch__(
-                    vm.$el, vnode, hydrating, false /* removeOnly */,
-                    vm.$options._parentElm,
-                    vm.$options._refElm
-                );
-                // no need for the ref nodes after initial patch
-                // this prevents keeping a detached DOM tree in memory (#5851)
-                vm.$options._parentElm = vm.$options._refElm = null;
-            } else {
-                // updates
-                vm.$el = vm.__patch__(prevVnode, vnode);
-            }
-            activeInstance = prevActiveInstance;
-            // update __vue__ reference
-            if (prevEl) {
-                prevEl.__vue__ = null;
-            }
-            if (vm.$el) {
-                vm.$el.__vue__ = vm;
-            }
-            // if parent is an HOC, update its $el as well
-            if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-                vm.$parent.$el = vm.$el;
-            }
-            // updated hook is called by the scheduler to ensure that children are
-            // updated in a parent's updated hook.
-        };
-
-        Vue.prototype.$forceUpdate = function () {
-            var vm = this;
-            if (vm._watcher) {
-                vm._watcher.update();
-            }
-        };
-
-        Vue.prototype.$destroy = function () {
-            var vm = this;
-            if (vm._isBeingDestroyed) {
-                return
-            }
-            callHook(vm, 'beforeDestroy');
-            vm._isBeingDestroyed = true;
-            // remove self from parent
-            var parent = vm.$parent;
-            if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-                remove(parent.$children, vm);
-            }
-            // teardown watchers
-            if (vm._watcher) {
-                vm._watcher.teardown();
-            }
-            var i = vm._watchers.length;
-            while (i--) {
-                vm._watchers[i].teardown();
-            }
-            // remove reference from data ob
-            // frozen object may not have observer.
-            if (vm._data.__ob__) {
-                vm._data.__ob__.vmCount--;
-            }
-            // call the last hook...
-            vm._isDestroyed = true;
-            // invoke destroy hooks on current rendered tree
-            vm.__patch__(vm._vnode, null);
-            // fire destroyed hook
-            callHook(vm, 'destroyed');
-            // turn off all instance listeners.
-            vm.$off();
-            // remove __vue__ reference
-            if (vm.$el) {
-                vm.$el.__vue__ = null;
-            }
-            // release circular reference (#6759)
-            if (vm.$vnode) {
-                vm.$vnode.parent = null;
-            }
-        };
-    }
-
-    function mountComponent(
-        vm,
-        el,
-        hydrating
-    ) {
-        vm.$el = el;
-        if (!vm.$options.render) {
-            vm.$options.render = createEmptyVNode;
-            {
-                /* istanbul ignore if */
-                if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-                    vm.$options.el || el) {
-                    warn(
-                        'You are using the runtime-only build of Vue where the template ' +
-                        'compiler is not available. Either pre-compile the templates into ' +
-                        'render functions, or use the compiler-included build.',
-                        vm
-                    );
-                } else {
-                    warn(
-                        'Failed to mount component: template or render function not defined.',
-                        vm
-                    );
-                }
-            }
-        }
-        callHook(vm, 'beforeMount');
-
-        var updateComponent;
-        /* istanbul ignore if */
-        if ("development" !== 'production' && config.performance && mark) {
-            updateComponent = function () {
-                var name = vm._name;
-                var id = vm._uid;
-                var startTag = "vue-perf-start:" + id;
-                var endTag = "vue-perf-end:" + id;
-
-                mark(startTag);
-                var vnode = vm._render();
-                mark(endTag);
-                measure(("vue " + name + " render"), startTag, endTag);
-
-                mark(startTag);
-                vm._update(vnode, hydrating);
-                mark(endTag);
-                measure(("vue " + name + " patch"), startTag, endTag);
-            };
-        } else {
-            updateComponent = function () {
-                vm._update(vm._render(), hydrating);
-            };
-        }
-
-        vm._watcher = new Watcher(vm, updateComponent, noop);
-        hydrating = false;
-
-        // manually mounted instance, call mounted on self
-        // mounted is called for render-created child components in its inserted hook
-        if (vm.$vnode == null) {
-            vm._isMounted = true;
-            callHook(vm, 'mounted');
-        }
-        return vm
-    }
-
-    function updateChildComponent(
-        vm,
-        propsData,
-        listeners,
-        parentVnode,
-        renderChildren
-    ) {
-        {
-            isUpdatingChildComponent = true;
-        }
-
-        // determine whether component has slot children
-        // we need to do this before overwriting $options._renderChildren
-        var hasChildren = !!(
-            renderChildren ||               // has new static slots
-            vm.$options._renderChildren ||  // has old static slots
-            parentVnode.data.scopedSlots || // has new scoped slots
-            vm.$scopedSlots !== emptyObject // has old scoped slots
-        );
-
-        vm.$options._parentVnode = parentVnode;
-        vm.$vnode = parentVnode; // update vm's placeholder node without re-render
-
-        if (vm._vnode) { // update child tree's parent
-            vm._vnode.parent = parentVnode;
-        }
-        vm.$options._renderChildren = renderChildren;
-
-        // update $attrs and $listeners hash
-        // these are also reactive so they may trigger child update if the child
-        // used them during render
-        vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-        vm.$listeners = listeners || emptyObject;
-
-        // update props
-        if (propsData && vm.$options.props) {
-            observerState.shouldConvert = false;
-            var props = vm._props;
-            var propKeys = vm.$options._propKeys || [];
-            for (var i = 0; i < propKeys.length; i++) {
-                var key = propKeys[i];
-                props[key] = validateProp(key, vm.$options.props, propsData, vm);
-            }
-            observerState.shouldConvert = true;
-            // keep a copy of raw propsData
-            vm.$options.propsData = propsData;
-        }
-
-        // update listeners
-        if (listeners) {
-            var oldListeners = vm.$options._parentListeners;
-            vm.$options._parentListeners = listeners;
-            updateComponentListeners(vm, listeners, oldListeners);
-        }
-        // resolve slots + force update if has children
-        if (hasChildren) {
-            vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-            vm.$forceUpdate();
-        }
-
-        {
-            isUpdatingChildComponent = false;
-        }
-    }
-
-    function isInInactiveTree(vm) {
-        while (vm && (vm = vm.$parent)) {
-            if (vm._inactive) { return true }
-        }
-        return false
-    }
-
-    function activateChildComponent(vm, direct) {
-        if (direct) {
-            vm._directInactive = false;
-            if (isInInactiveTree(vm)) {
-                return
-            }
-        } else if (vm._directInactive) {
-            return
-        }
-        if (vm._inactive || vm._inactive === null) {
-            vm._inactive = false;
-            for (var i = 0; i < vm.$children.length; i++) {
-                activateChildComponent(vm.$children[i]);
-            }
-            callHook(vm, 'activated');
-        }
-    }
-
-    function deactivateChildComponent(vm, direct) {
-        if (direct) {
-            vm._directInactive = true;
-            if (isInInactiveTree(vm)) {
-                return
-            }
-        }
-        if (!vm._inactive) {
-            vm._inactive = true;
-            for (var i = 0; i < vm.$children.length; i++) {
-                deactivateChildComponent(vm.$children[i]);
-            }
-            callHook(vm, 'deactivated');
-        }
-    }
-
-    function callHook(vm, hook) {
-        var handlers = vm.$options[hook];
-        if (handlers) {
-            for (var i = 0, j = handlers.length; i < j; i++) {
-                try {
-                    handlers[i].call(vm);
-                } catch (e) {
-                    handleError(e, vm, (hook + " hook"));
-                }
-            }
-        }
-        if (vm._hasHookEvent) {
-            vm.$emit('hook:' + hook);
-        }
-    }
-
-    /*  */
-
-
-    var MAX_UPDATE_COUNT = 100;
-
-    var queue = [];
-    var activatedChildren = [];
-    var has = {};
-    var circular = {};
-    var waiting = false;
-    var flushing = false;
-    var index = 0;
-
-    /**
-     * Reset the scheduler's state.
-     */
-    function resetSchedulerState() {
-        index = queue.length = activatedChildren.length = 0;
-        has = {};
-        {
-            circular = {};
-        }
-        waiting = flushing = false;
-    }
-
-    /**
-     * Flush both queues and run the watchers.
-     */
-    function flushSchedulerQueue() {
-        flushing = true;
-        var watcher, id;
-
-        // Sort queue before flush.
-        // This ensures that:
-        // 1. Components are updated from parent to child. (because parent is always
-        //    created before the child)
-        // 2. A component's user watchers are run before its render watcher (because
-        //    user watchers are created before the render watcher)
-        // 3. If a component is destroyed during a parent component's watcher run,
-        //    its watchers can be skipped.
-        queue.sort(function (a, b) { return a.id - b.id; });
-
-        // do not cache length because more watchers might be pushed
-        // as we run existing watchers
-        for (index = 0; index < queue.length; index++) {
-            watcher = queue[index];
-            id = watcher.id;
-            has[id] = null;
-            watcher.run();
-            // in dev build, check and stop circular updates.
-            if ("development" !== 'production' && has[id] != null) {
-                circular[id] = (circular[id] || 0) + 1;
-                if (circular[id] > MAX_UPDATE_COUNT) {
-                    warn(
-                        'You may have an infinite update loop ' + (
-                            watcher.user
-                                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-                                : "in a component render function."
-                        ),
-                        watcher.vm
-                    );
-                    break
-                }
-            }
-        }
-
-        // keep copies of post queues before resetting state
-        var activatedQueue = activatedChildren.slice();
-        var updatedQueue = queue.slice();
-
-        resetSchedulerState();
-
-        // call component updated and activated hooks
-        callActivatedHooks(activatedQueue);
-        callUpdatedHooks(updatedQueue);
-
-        // devtool hook
-        /* istanbul ignore if */
-        if (devtools && config.devtools) {
-            devtools.emit('flush');
-        }
-    }
-
-    function callUpdatedHooks(queue) {
-        var i = queue.length;
-        while (i--) {
-            var watcher = queue[i];
-            var vm = watcher.vm;
-            if (vm._watcher === watcher && vm._isMounted) {
-                callHook(vm, 'updated');
-            }
-        }
-    }
-
-    /**
-     * Queue a kept-alive component that was activated during patch.
-     * The queue will be processed after the entire tree has been patched.
-     */
-    function queueActivatedComponent(vm) {
-        // setting _inactive to false here so that a render function can
-        // rely on checking whether it's in an inactive tree (e.g. router-view)
-        vm._inactive = false;
-        activatedChildren.push(vm);
-    }
-
-    function callActivatedHooks(queue) {
-        for (var i = 0; i < queue.length; i++) {
-            queue[i]._inactive = true;
-            activateChildComponent(queue[i], true /* true */);
-        }
-    }
-
-    /**
-     * Push a watcher into the watcher queue.
-     * Jobs with duplicate IDs will be skipped unless it's
-     * pushed when the queue is being flushed.
-     */
-    function queueWatcher(watcher) {
-        var id = watcher.id;
-        if (has[id] == null) {
-            has[id] = true;
-            if (!flushing) {
-                queue.push(watcher);
-            } else {
-                // if already flushing, splice the watcher based on its id
-                // if already past its id, it will be run next immediately.
-                var i = queue.length - 1;
-                while (i > index && queue[i].id > watcher.id) {
-                    i--;
-                }
-                queue.splice(i + 1, 0, watcher);
-            }
-            // queue the flush
-            if (!waiting) {
-                waiting = true;
-                nextTick(flushSchedulerQueue);
-            }
-        }
-    }
-
-    /*  */
-
-    var uid$2 = 0;
-
-    /**
-     * A watcher parses an expression, collects dependencies,
-     * and fires callback when the expression value changes.
-     * This is used for both the $watch() api and directives.
-     */
-    var Watcher = function Watcher(
-        vm,
-        expOrFn,
-        cb,
-        options
-    ) {
-        this.vm = vm;
-        vm._watchers.push(this);
-        // options
-        if (options) {
-            this.deep = !!options.deep;
-            this.user = !!options.user;
-            this.lazy = !!options.lazy;
-            this.sync = !!options.sync;
-        } else {
-            this.deep = this.user = this.lazy = this.sync = false;
-        }
-        this.cb = cb;
-        this.id = ++uid$2; // uid for batching
-        this.active = true;
-        this.dirty = this.lazy; // for lazy watchers
-        this.deps = [];
-        this.newDeps = [];
-        this.depIds = new _Set();
-        this.newDepIds = new _Set();
-        this.expression = expOrFn.toString();
-        // parse expression for getter
-        if (typeof expOrFn === 'function') {
-            this.getter = expOrFn;
-        } else {
-            this.getter = parsePath(expOrFn);
-            if (!this.getter) {
-                this.getter = function () { };
-                "development" !== 'production' && warn(
-                    "Failed watching path: \"" + expOrFn + "\" " +
-                    'Watcher only accepts simple dot-delimited paths. ' +
-                    'For full control, use a function instead.',
-                    vm
-                );
-            }
-        }
-        this.value = this.lazy
-            ? undefined
-            : this.get();
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
     };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
 
-    /**
-     * Evaluate the getter, and re-collect dependencies.
-     */
-    Watcher.prototype.get = function get() {
-        pushTarget(this);
-        var value;
-        var vm = this.vm;
-        try {
-            value = this.getter.call(vm, vm);
-        } catch (e) {
-            if (this.user) {
-                handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
-            } else {
-                throw e
-            }
-        } finally {
-            // "touch" every property so they are all tracked as
-            // dependencies for deep watching
-            if (this.deep) {
-                traverse(value);
-            }
-            popTarget();
-            this.cleanupDeps();
-        }
-        return value
-    };
+installRenderHelpers(FunctionalRenderContext.prototype);
 
-    /**
-     * Add a dependency to this directive.
-     */
-    Watcher.prototype.addDep = function addDep(dep) {
-        var id = dep.id;
-        if (!this.newDepIds.has(id)) {
-            this.newDepIds.add(id);
-            this.newDeps.push(dep);
-            if (!this.depIds.has(id)) {
-                dep.addSub(this);
-            }
-        }
-    };
-
-    /**
-     * Clean up for dependency collection.
-     */
-    Watcher.prototype.cleanupDeps = function cleanupDeps() {
-        var this$1 = this;
-
-        var i = this.deps.length;
-        while (i--) {
-            var dep = this$1.deps[i];
-            if (!this$1.newDepIds.has(dep.id)) {
-                dep.removeSub(this$1);
-            }
-        }
-        var tmp = this.depIds;
-        this.depIds = this.newDepIds;
-        this.newDepIds = tmp;
-        this.newDepIds.clear();
-        tmp = this.deps;
-        this.deps = this.newDeps;
-        this.newDeps = tmp;
-        this.newDeps.length = 0;
-    };
-
-    /**
-     * Subscriber interface.
-     * Will be called when a dependency changes.
-     */
-    Watcher.prototype.update = function update() {
-        /* istanbul ignore else */
-        if (this.lazy) {
-            this.dirty = true;
-        } else if (this.sync) {
-            this.run();
-        } else {
-            queueWatcher(this);
-        }
-    };
-
-    /**
-     * Scheduler job interface.
-     * Will be called by the scheduler.
-     */
-    Watcher.prototype.run = function run() {
-        if (this.active) {
-            var value = this.get();
-            if (
-                value !== this.value ||
-                // Deep watchers and watchers on Object/Arrays should fire even
-                // when the value is the same, because the value may
-                // have mutated.
-                isObject(value) ||
-                this.deep
-            ) {
-                // set new value
-                var oldValue = this.value;
-                this.value = value;
-                if (this.user) {
-                    try {
-                        this.cb.call(this.vm, value, oldValue);
-                    } catch (e) {
-                        handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-                    }
-                } else {
-                    this.cb.call(this.vm, value, oldValue);
-                }
-            }
-        }
-    };
-
-    /**
-     * Evaluate the value of the watcher.
-     * This only gets called for lazy watchers.
-     */
-    Watcher.prototype.evaluate = function evaluate() {
-        this.value = this.get();
-        this.dirty = false;
-    };
-
-    /**
-     * Depend on all deps collected by this watcher.
-     */
-    Watcher.prototype.depend = function depend() {
-        var this$1 = this;
-
-        var i = this.deps.length;
-        while (i--) {
-            this$1.deps[i].depend();
-        }
-    };
-
-    /**
-     * Remove self from all dependencies' subscriber list.
-     */
-    Watcher.prototype.teardown = function teardown() {
-        var this$1 = this;
-
-        if (this.active) {
-            // remove self from vm's watcher list
-            // this is a somewhat expensive operation so we skip it
-            // if the vm is being destroyed.
-            if (!this.vm._isBeingDestroyed) {
-                remove(this.vm._watchers, this);
-            }
-            var i = this.deps.length;
-            while (i--) {
-                this$1.deps[i].removeSub(this$1);
-            }
-            this.active = false;
-        }
-    };
-
-    /**
-     * Recursively traverse an object to evoke all converted
-     * getters, so that every nested property inside the object
-     * is collected as a "deep" dependency.
-     */
-    var seenObjects = new _Set();
-    function traverse(val) {
-        seenObjects.clear();
-        _traverse(val, seenObjects);
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
     }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
 
-    function _traverse(val, seen) {
-        var i, keys;
-        var isA = Array.isArray(val);
-        if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
-            return
-        }
-        if (val.__ob__) {
-            var depId = val.__ob__.dep.id;
-            if (seen.has(depId)) {
-                return
-            }
-            seen.add(depId);
-        }
-        if (isA) {
-            i = val.length;
-            while (i--) { _traverse(val[i], seen); }
-        } else {
-            keys = Object.keys(val);
-            i = keys.length;
-            while (i--) { _traverse(val[keys[i]], seen); }
-        }
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    vnode.fnContext = contextVm;
+    vnode.fnOptions = options;
+    if (data.slot) {
+      (vnode.data || (vnode.data = {})).slot = data.slot;
     }
+  }
 
-    /*  */
+  return vnode
+}
 
-    var sharedPropertyDefinition = {
-        enumerable: true,
-        configurable: true,
-        get: noop,
-        set: noop
-    };
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
 
-    function proxy(target, sourceKey, key) {
-        sharedPropertyDefinition.get = function proxyGetter() {
-            return this[sourceKey][key]
-        };
-        sharedPropertyDefinition.set = function proxySetter(val) {
-            this[sourceKey][key] = val;
-        };
-        Object.defineProperty(target, key, sharedPropertyDefinition);
-    }
+/*  */
 
-    function initState(vm) {
-        vm._watchers = [];
-        var opts = vm.$options;
-        if (opts.props) { initProps(vm, opts.props); }
-        if (opts.methods) { initMethods(vm, opts.methods); }
-        if (opts.data) {
-            initData(vm);
-        } else {
-            observe(vm._data = {}, true /* asRootData */);
-        }
-        if (opts.computed) { initComputed(vm, opts.computed); }
-        if (opts.watch && opts.watch !== nativeWatch) {
-            initWatch(vm, opts.watch);
-        }
-    }
 
-    function initProps(vm, propsOptions) {
-        var propsData = vm.$options.propsData || {};
-        var props = vm._props = {};
-        // cache prop keys so that future props updates can iterate using Array
-        // instead of dynamic object key enumeration.
-        var keys = vm.$options._propKeys = [];
-        var isRoot = !vm.$parent;
-        // root instance props should be converted
-        observerState.shouldConvert = isRoot;
-        var loop = function (key) {
-            keys.push(key);
-            var value = validateProp(key, propsOptions, propsData, vm);
-            /* istanbul ignore else */
-            {
-                var hyphenatedKey = hyphenate(key);
-                if (isReservedAttribute(hyphenatedKey) ||
-                    config.isReservedAttr(hyphenatedKey)) {
-                    warn(
-                        ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-                        vm
-                    );
-                }
-                defineReactive(props, key, value, function () {
-                    if (vm.$parent && !isUpdatingChildComponent) {
-                        warn(
-                            "Avoid mutating a prop directly since the value will be " +
-                            "overwritten whenever the parent component re-renders. " +
-                            "Instead, use a data or computed property based on the prop's " +
-                            "value. Prop being mutated: \"" + key + "\"",
-                            vm
-                        );
-                    }
-                });
-            }
-            // static props are already proxied on the component's prototype
-            // during Vue.extend(). We only need to proxy props defined at
-            // instantiation here.
-            if (!(key in vm)) {
-                proxy(vm, "_props", key);
-            }
-        };
 
-        for (var key in propsOptions) loop(key);
-        observerState.shouldConvert = true;
-    }
 
-    function initData(vm) {
-        var data = vm.$options.data;
-        data = vm._data = typeof data === 'function'
-            ? getData(data, vm)
-            : data || {};
-        if (!isPlainObject(data)) {
-            data = {};
-            "development" !== 'production' && warn(
-                'data functions should return an object:\n' +
-                'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-                vm
-            );
-        }
-        // proxy data on instance
-        var keys = Object.keys(data);
-        var props = vm.$options.props;
-        var methods = vm.$options.methods;
-        var i = keys.length;
-        while (i--) {
-            var key = keys[i];
-            {
-                if (methods && hasOwn(methods, key)) {
-                    warn(
-                        ("Method \"" + key + "\" has already been defined as a data property."),
-                        vm
-                    );
-                }
-            }
-            if (props && hasOwn(props, key)) {
-                "development" !== 'production' && warn(
-                    "The data property \"" + key + "\" is already declared as a prop. " +
-                    "Use prop default value instead.",
-                    vm
-                );
-            } else if (!isReserved(key)) {
-                proxy(vm, "_data", key);
-            }
-        }
-        // observe data
-        observe(data, true /* asRootData */);
-    }
+// Register the component hook to weex native render engine.
+// The hook will be triggered by native, not javascript.
 
-    function getData(data, vm) {
-        try {
-            return data.call(vm, vm)
-        } catch (e) {
-            handleError(e, vm, "data()");
-            return {}
-        }
-    }
 
-    var computedWatcherOptions = { lazy: true };
+// Updates the state of the component to weex native render engine.
 
-    function initComputed(vm, computed) {
-        var watchers = vm._computedWatchers = Object.create(null);
-        // computed properties are just getters during SSR
-        var isSSR = isServerRendering();
+/*  */
 
-        for (var key in computed) {
-            var userDef = computed[key];
-            var getter = typeof userDef === 'function' ? userDef : userDef.get;
-            if ("development" !== 'production' && getter == null) {
-                warn(
-                    ("Getter is missing for computed property \"" + key + "\"."),
-                    vm
-                );
-            }
+// https://github.com/Hanks10100/weex-native-directive/tree/master/component
 
-            if (!isSSR) {
-                // create internal watcher for the computed property.
-                watchers[key] = new Watcher(
-                    vm,
-                    getter || noop,
-                    noop,
-                    computedWatcherOptions
-                );
-            }
+// listening on native callback
 
-            // component-defined computed properties are already defined on the
-            // component prototype. We only need to define computed properties defined
-            // at instantiation here.
-            if (!(key in vm)) {
-                defineComputed(vm, key, userDef);
-            } else {
-                if (key in vm.$data) {
-                    warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-                } else if (vm.$options.props && key in vm.$options.props) {
-                    warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-                }
-            }
-        }
-    }
+/*  */
 
-    function defineComputed(
-        target,
-        key,
-        userDef
-    ) {
-        var shouldCache = !isServerRendering();
-        if (typeof userDef === 'function') {
-            sharedPropertyDefinition.get = shouldCache
-                ? createComputedGetter(key)
-                : userDef;
-            sharedPropertyDefinition.set = noop;
-        } else {
-            sharedPropertyDefinition.get = userDef.get
-                ? shouldCache && userDef.cache !== false
-                    ? createComputedGetter(key)
-                    : userDef.get
-                : noop;
-            sharedPropertyDefinition.set = userDef.set
-                ? userDef.set
-                : noop;
-        }
-        if ("development" !== 'production' &&
-            sharedPropertyDefinition.set === noop) {
-            sharedPropertyDefinition.set = function () {
-                warn(
-                    ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-                    this
-                );
-            };
-        }
-        Object.defineProperty(target, key, sharedPropertyDefinition);
-    }
+/*  */
 
-    function createComputedGetter(key) {
-        return function computedGetter() {
-            var watcher = this._computedWatchers && this._computedWatchers[key];
-            if (watcher) {
-                if (watcher.dirty) {
-                    watcher.evaluate();
-                }
-                if (Dep.target) {
-                    watcher.depend();
-                }
-                return watcher.value
-            }
-        }
-    }
-
-    function initMethods(vm, methods) {
-        var props = vm.$options.props;
-        for (var key in methods) {
-            {
-                if (methods[key] == null) {
-                    warn(
-                        "Method \"" + key + "\" has an undefined value in the component definition. " +
-                        "Did you reference the function correctly?",
-                        vm
-                    );
-                }
-                if (props && hasOwn(props, key)) {
-                    warn(
-                        ("Method \"" + key + "\" has already been defined as a prop."),
-                        vm
-                    );
-                }
-                if ((key in vm) && isReserved(key)) {
-                    warn(
-                        "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-                        "Avoid defining component methods that start with _ or $."
-                    );
-                }
-            }
-            vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
-        }
-    }
-
-    function initWatch(vm, watch) {
-        for (var key in watch) {
-            var handler = watch[key];
-            if (Array.isArray(handler)) {
-                for (var i = 0; i < handler.length; i++) {
-                    createWatcher(vm, key, handler[i]);
-                }
-            } else {
-                createWatcher(vm, key, handler);
-            }
-        }
-    }
-
-    function createWatcher(
-        vm,
-        keyOrFn,
-        handler,
-        options
-    ) {
-        if (isPlainObject(handler)) {
-            options = handler;
-            handler = handler.handler;
-        }
-        if (typeof handler === 'string') {
-            handler = vm[handler];
-        }
-        return vm.$watch(keyOrFn, handler, options)
-    }
-
-    function stateMixin(Vue) {
-        // flow somehow has problems with directly declared definition object
-        // when using Object.defineProperty, so we have to procedurally build up
-        // the object here.
-        var dataDef = {};
-        dataDef.get = function () { return this._data };
-        var propsDef = {};
-        propsDef.get = function () { return this._props };
-        {
-            dataDef.set = function (newData) {
-                warn(
-                    'Avoid replacing instance root $data. ' +
-                    'Use nested data properties instead.',
-                    this
-                );
-            };
-            propsDef.set = function () {
-                warn("$props is readonly.", this);
-            };
-        }
-        Object.defineProperty(Vue.prototype, '$data', dataDef);
-        Object.defineProperty(Vue.prototype, '$props', propsDef);
-
-        Vue.prototype.$set = set;
-        Vue.prototype.$delete = del;
-
-        Vue.prototype.$watch = function (
-            expOrFn,
-            cb,
-            options
-        ) {
-            var vm = this;
-            if (isPlainObject(cb)) {
-                return createWatcher(vm, expOrFn, cb, options)
-            }
-            options = options || {};
-            options.user = true;
-            var watcher = new Watcher(vm, expOrFn, cb, options);
-            if (options.immediate) {
-                cb.call(vm, watcher.value);
-            }
-            return function unwatchFn() {
-                watcher.teardown();
-            }
-        };
-    }
-
-    /*  */
-
-    function initProvide(vm) {
-        var provide = vm.$options.provide;
-        if (provide) {
-            vm._provided = typeof provide === 'function'
-                ? provide.call(vm)
-                : provide;
-        }
-    }
-
-    function initInjections(vm) {
-        var result = resolveInject(vm.$options.inject, vm);
-        if (result) {
-            observerState.shouldConvert = false;
-            Object.keys(result).forEach(function (key) {
-                /* istanbul ignore else */
-                {
-                    defineReactive(vm, key, result[key], function () {
-                        warn(
-                            "Avoid mutating an injected value directly since the changes will be " +
-                            "overwritten whenever the provided component re-renders. " +
-                            "injection being mutated: \"" + key + "\"",
-                            vm
-                        );
-                    });
-                }
-            });
-            observerState.shouldConvert = true;
-        }
-    }
-
-    function resolveInject(inject, vm) {
-        if (inject) {
-            // inject is :any because flow is not smart enough to figure out cached
-            var result = Object.create(null);
-            var keys = hasSymbol
-                ? Reflect.ownKeys(inject).filter(function (key) {
-                    /* istanbul ignore next */
-                    return Object.getOwnPropertyDescriptor(inject, key).enumerable
-                })
-                : Object.keys(inject);
-
-            for (var i = 0; i < keys.length; i++) {
-                var key = keys[i];
-                var provideKey = inject[key].from;
-                var source = vm;
-                while (source) {
-                    if (source._provided && provideKey in source._provided) {
-                        result[key] = source._provided[provideKey];
-                        break
-                    }
-                    source = source.$parent;
-                }
-                if (!source) {
-                    if ('default' in inject[key]) {
-                        var provideDefault = inject[key].default;
-                        result[key] = typeof provideDefault === 'function'
-                            ? provideDefault.call(vm)
-                            : provideDefault;
-                    } else {
-                        warn(("Injection \"" + key + "\" not found"), vm);
-                    }
-                }
-            }
-            return result
-        }
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for rendering v-for lists.
-     */
-    function renderList(
-        val,
-        render
-    ) {
-        var ret, i, l, keys, key;
-        if (Array.isArray(val) || typeof val === 'string') {
-            ret = new Array(val.length);
-            for (i = 0, l = val.length; i < l; i++) {
-                ret[i] = render(val[i], i);
-            }
-        } else if (typeof val === 'number') {
-            ret = new Array(val);
-            for (i = 0; i < val; i++) {
-                ret[i] = render(i + 1, i);
-            }
-        } else if (isObject(val)) {
-            keys = Object.keys(val);
-            ret = new Array(keys.length);
-            for (i = 0, l = keys.length; i < l; i++) {
-                key = keys[i];
-                ret[i] = render(val[key], key, i);
-            }
-        }
-        if (isDef(ret)) {
-            (ret)._isVList = true;
-        }
-        return ret
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for rendering <slot>
-     */
-    function renderSlot(
-        name,
-        fallback,
-        props,
-        bindObject
-    ) {
-        var scopedSlotFn = this.$scopedSlots[name];
-        if (scopedSlotFn) { // scoped slot
-            props = props || {};
-            if (bindObject) {
-                if ("development" !== 'production' && !isObject(bindObject)) {
-                    warn(
-                        'slot v-bind without argument expects an Object',
-                        this
-                    );
-                }
-                props = extend(extend({}, bindObject), props);
-            }
-            return scopedSlotFn(props) || fallback
-        } else {
-            var slotNodes = this.$slots[name];
-            // warn duplicate slot usage
-            if (slotNodes && "development" !== 'production') {
-                slotNodes._rendered && warn(
-                    "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-                    "- this will likely cause render errors.",
-                    this
-                );
-                slotNodes._rendered = true;
-            }
-            return slotNodes || fallback
-        }
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for resolving filters
-     */
-    function resolveFilter(id) {
-        return resolveAsset(this.$options, 'filters', id, true) || identity
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for checking keyCodes from config.
-     * exposed as Vue.prototype._k
-     * passing in eventKeyName as last argument separately for backwards compat
-     */
-    function checkKeyCodes(
-        eventKeyCode,
-        key,
-        builtInAlias,
-        eventKeyName
-    ) {
-        var keyCodes = config.keyCodes[key] || builtInAlias;
-        if (keyCodes) {
-            if (Array.isArray(keyCodes)) {
-                return keyCodes.indexOf(eventKeyCode) === -1
-            } else {
-                return keyCodes !== eventKeyCode
-            }
-        } else if (eventKeyName) {
-            return hyphenate(eventKeyName) !== key
-        }
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for merging v-bind="object" into a VNode's data.
-     */
-    function bindObjectProps(
-        data,
-        tag,
-        value,
-        asProp,
-        isSync
-    ) {
-        if (value) {
-            if (!isObject(value)) {
-                "development" !== 'production' && warn(
-                    'v-bind without argument expects an Object or Array value',
-                    this
-                );
-            } else {
-                if (Array.isArray(value)) {
-                    value = toObject(value);
-                }
-                var hash;
-                var loop = function (key) {
-                    if (
-                        key === 'class' ||
-                        key === 'style' ||
-                        isReservedAttribute(key)
-                    ) {
-                        hash = data;
-                    } else {
-                        var type = data.attrs && data.attrs.type;
-                        hash = asProp || config.mustUseProp(tag, type, key)
-                            ? data.domProps || (data.domProps = {})
-                            : data.attrs || (data.attrs = {});
-                    }
-                    if (!(key in hash)) {
-                        hash[key] = value[key];
-
-                        if (isSync) {
-                            var on = data.on || (data.on = {});
-                            on[("update:" + key)] = function ($event) {
-                                value[key] = $event;
-                            };
-                        }
-                    }
-                };
-
-                for (var key in value) loop(key);
-            }
-        }
-        return data
-    }
-
-    /*  */
-
-    /**
-     * Runtime helper for rendering static trees.
-     */
-    function renderStatic(
-        index,
-        isInFor
-    ) {
-        // static trees can be rendered once and cached on the contructor options
-        // so every instance shares the same cached trees
-        var renderFns = this.$options.staticRenderFns;
-        var cached = renderFns.cached || (renderFns.cached = []);
-        var tree = cached[index];
-        // if has already-rendered static tree and not inside v-for,
-        // we can reuse the same tree by doing a shallow clone.
-        if (tree && !isInFor) {
-            return Array.isArray(tree)
-                ? cloneVNodes(tree)
-                : cloneVNode(tree)
-        }
-        // otherwise, render a fresh tree.
-        tree = cached[index] = renderFns[index].call(this._renderProxy, null, this);
-        markStatic(tree, ("__static__" + index), false);
-        return tree
-    }
-
-    /**
-     * Runtime helper for v-once.
-     * Effectively it means marking the node as static with a unique key.
-     */
-    function markOnce(
-        tree,
-        index,
-        key
-    ) {
-        markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-        return tree
-    }
-
-    function markStatic(
-        tree,
-        key,
-        isOnce
-    ) {
-        if (Array.isArray(tree)) {
-            for (var i = 0; i < tree.length; i++) {
-                if (tree[i] && typeof tree[i] !== 'string') {
-                    markStaticNode(tree[i], (key + "_" + i), isOnce);
-                }
-            }
-        } else {
-            markStaticNode(tree, key, isOnce);
-        }
-    }
-
-    function markStaticNode(node, key, isOnce) {
-        node.isStatic = true;
-        node.key = key;
-        node.isOnce = isOnce;
-    }
-
-    /*  */
-
-    function bindObjectListeners(data, value) {
-        if (value) {
-            if (!isPlainObject(value)) {
-                "development" !== 'production' && warn(
-                    'v-on without argument expects an Object value',
-                    this
-                );
-            } else {
-                var on = data.on = data.on ? extend({}, data.on) : {};
-                for (var key in value) {
-                    var existing = on[key];
-                    var ours = value[key];
-                    on[key] = existing ? [].concat(existing, ours) : ours;
-                }
-            }
-        }
-        return data
-    }
-
-    /*  */
-
-    function installRenderHelpers(target) {
-        target._o = markOnce;
-        target._n = toNumber;
-        target._s = toString;
-        target._l = renderList;
-        target._t = renderSlot;
-        target._q = looseEqual;
-        target._i = looseIndexOf;
-        target._m = renderStatic;
-        target._f = resolveFilter;
-        target._k = checkKeyCodes;
-        target._b = bindObjectProps;
-        target._v = createTextVNode;
-        target._e = createEmptyVNode;
-        target._u = resolveScopedSlots;
-        target._g = bindObjectListeners;
-    }
-
-    /*  */
-
-    function FunctionalRenderContext(
-        data,
-        props,
-        children,
-        parent,
-        Ctor
-    ) {
-        var options = Ctor.options;
-        this.data = data;
-        this.props = props;
-        this.children = children;
-        this.parent = parent;
-        this.listeners = data.on || emptyObject;
-        this.injections = resolveInject(options.inject, parent);
-        this.slots = function () { return resolveSlots(children, parent); };
-
-        // ensure the createElement function in functional components
-        // gets a unique context - this is necessary for correct named slot check
-        var contextVm = Object.create(parent);
-        var isCompiled = isTrue(options._compiled);
-        var needNormalization = !isCompiled;
-
-        // support for compiled functional template
-        if (isCompiled) {
-            // exposing $options for renderStatic()
-            this.$options = options;
-            // pre-resolve slots for renderSlot()
-            this.$slots = this.slots();
-            this.$scopedSlots = data.scopedSlots || emptyObject;
-        }
-
-        if (options._scopeId) {
-            this._c = function (a, b, c, d) {
-                var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-                if (vnode) {
-                    vnode.functionalScopeId = options._scopeId;
-                    vnode.functionalContext = parent;
-                }
-                return vnode
-            };
-        } else {
-            this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-        }
-    }
-
-    installRenderHelpers(FunctionalRenderContext.prototype);
-
-    function createFunctionalComponent(
-        Ctor,
-        propsData,
-        data,
-        contextVm,
-        children
-    ) {
-        var options = Ctor.options;
-        var props = {};
-        var propOptions = options.props;
-        if (isDef(propOptions)) {
-            for (var key in propOptions) {
-                props[key] = validateProp(key, propOptions, propsData || emptyObject);
-            }
-        } else {
-            if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-            if (isDef(data.props)) { mergeProps(props, data.props); }
-        }
-
-        var renderContext = new FunctionalRenderContext(
-            data,
-            props,
-            children,
-            contextVm,
-            Ctor
-        );
-
-        var vnode = options.render.call(null, renderContext._c, renderContext);
-
-        if (vnode instanceof VNode) {
-            vnode.functionalContext = contextVm;
-            vnode.functionalOptions = options;
-            if (data.slot) {
-                (vnode.data || (vnode.data = {})).slot = data.slot;
-            }
-        }
-
-        return vnode
-    }
-
-    function mergeProps(to, from) {
-        for (var key in from) {
-            to[camelize(key)] = from[key];
-        }
-    }
-
-    /*  */
-
-    // hooks to be invoked on component VNodes during patch
-    var componentVNodeHooks = {
-        init: function init(
-            vnode,
-            hydrating,
-            parentElm,
-            refElm
-        ) {
-            if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-                var child = vnode.componentInstance = createComponentInstanceForVnode(
-                    vnode,
-                    activeInstance,
-                    parentElm,
-                    refElm
-                );
-                child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-            } else if (vnode.data.keepAlive) {
-                // kept-alive components, treat as a patch
-                var mountedNode = vnode; // work around flow
-                componentVNodeHooks.prepatch(mountedNode, mountedNode);
-            }
-        },
-
-        prepatch: function prepatch(oldVnode, vnode) {
-            var options = vnode.componentOptions;
-            var child = vnode.componentInstance = oldVnode.componentInstance;
-            updateChildComponent(
-                child,
-                options.propsData, // updated props
-                options.listeners, // updated listeners
-                vnode, // new parent vnode
-                options.children // new children
-            );
-        },
-
-        insert: function insert(vnode) {
-            var context = vnode.context;
-            var componentInstance = vnode.componentInstance;
-            if (!componentInstance._isMounted) {
-                componentInstance._isMounted = true;
-                callHook(componentInstance, 'mounted');
-            }
-            if (vnode.data.keepAlive) {
-                if (context._isMounted) {
-                    // vue-router#1212
-                    // During updates, a kept-alive component's child components may
-                    // change, so directly walking the tree here may call activated hooks
-                    // on incorrect children. Instead we push them into a queue which will
-                    // be processed after the whole patch process ended.
-                    queueActivatedComponent(componentInstance);
-                } else {
-                    activateChildComponent(componentInstance, true /* direct */);
-                }
-            }
-        },
-
-        destroy: function destroy(vnode) {
-            var componentInstance = vnode.componentInstance;
-            if (!componentInstance._isDestroyed) {
-                if (!vnode.data.keepAlive) {
-                    componentInstance.$destroy();
-                } else {
-                    deactivateChildComponent(componentInstance, true /* direct */);
-                }
-            }
-        }
-    };
-
-    var hooksToMerge = Object.keys(componentVNodeHooks);
-
-    function createComponent(
-        Ctor,
-        data,
-        context,
-        children,
-        tag
-    ) {
-        if (isUndef(Ctor)) {
-            return
-        }
-
-        var baseCtor = context.$options._base;
-
-        // plain options object: turn it into a constructor
-        if (isObject(Ctor)) {
-            Ctor = baseCtor.extend(Ctor);
-        }
-
-        // if at this stage it's not a constructor or an async component factory,
-        // reject.
-        if (typeof Ctor !== 'function') {
-            {
-                warn(("Invalid Component definition: " + (String(Ctor))), context);
-            }
-            return
-        }
-
-        // async component
-        var asyncFactory;
-        if (isUndef(Ctor.cid)) {
-            asyncFactory = Ctor;
-            Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-            if (Ctor === undefined) {
-                // return a placeholder node for async component, which is rendered
-                // as a comment node but preserves all the raw information for the node.
-                // the information will be used for async server-rendering and hydration.
-                return createAsyncPlaceholder(
-                    asyncFactory,
-                    data,
-                    context,
-                    children,
-                    tag
-                )
-            }
-        }
-
-        data = data || {};
-
-        // resolve constructor options in case global mixins are applied after
-        // component constructor creation
-        resolveConstructorOptions(Ctor);
-
-        // transform component v-model data into props & events
-        if (isDef(data.model)) {
-            transformModel(Ctor.options, data);
-        }
-
-        // extract props
-        var propsData = extractPropsFromVNodeData(data, Ctor, tag);
-
-        // functional component
-        if (isTrue(Ctor.options.functional)) {
-            return createFunctionalComponent(Ctor, propsData, data, context, children)
-        }
-
-        // extract listeners, since these needs to be treated as
-        // child component listeners instead of DOM listeners
-        var listeners = data.on;
-        // replace with listeners with .native modifier
-        // so it gets processed during parent component patch.
-        data.on = data.nativeOn;
-
-        if (isTrue(Ctor.options.abstract)) {
-            // abstract components do not keep anything
-            // other than props & listeners & slot
-
-            // work around flow
-            var slot = data.slot;
-            data = {};
-            if (slot) {
-                data.slot = slot;
-            }
-        }
-
-        // merge component management hooks onto the placeholder node
-        mergeHooks(data);
-
-        // return a placeholder vnode
-        var name = Ctor.options.name || tag;
-        var vnode = new VNode(
-            ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-            data, undefined, undefined, undefined, context,
-            { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-            asyncFactory
-        );
-        return vnode
-    }
-
-    function createComponentInstanceForVnode(
-        vnode, // we know it's MountedComponentVNode but flow doesn't
-        parent, // activeInstance in lifecycle state
+// hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (
+    vnode,
+    hydrating,
+    parentElm,
+    refElm
+  ) {
+    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance,
         parentElm,
         refElm
-    ) {
-        var vnodeComponentOptions = vnode.componentOptions;
-        var options = {
-            _isComponent: true,
-            parent: parent,
-            propsData: vnodeComponentOptions.propsData,
-            _componentTag: vnodeComponentOptions.tag,
-            _parentVnode: vnode,
-            _parentListeners: vnodeComponentOptions.listeners,
-            _renderChildren: vnodeComponentOptions.children,
-            _parentElm: parentElm || null,
-            _refElm: refElm || null
-        };
-        // check inline-template render functions
-        var inlineTemplate = vnode.data.inlineTemplate;
-        if (isDef(inlineTemplate)) {
-            options.render = inlineTemplate.render;
-            options.staticRenderFns = inlineTemplate.staticRenderFns;
-        }
-        return new vnodeComponentOptions.Ctor(options)
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    } else if (vnode.data.keepAlive) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     }
+  },
 
-    function mergeHooks(data) {
-        if (!data.hook) {
-            data.hook = {};
-        }
-        for (var i = 0; i < hooksToMerge.length; i++) {
-            var key = hooksToMerge[i];
-            var fromParent = data.hook[key];
-            var ours = componentVNodeHooks[key];
-            data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-        }
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
     }
-
-    function mergeHook$1(one, two) {
-        return function (a, b, c, d) {
-            one(a, b, c, d);
-            two(a, b, c, d);
-        }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
     }
+  },
 
-    // transform component v-model info (value and callback) into
-    // prop and event handler respectively.
-    function transformModel(options, data) {
-        var prop = (options.model && options.model.prop) || 'value';
-        var event = (options.model && options.model.event) || 'input'; (data.props || (data.props = {}))[prop] = data.model.value;
-        var on = data.on || (data.on = {});
-        if (isDef(on[event])) {
-            on[event] = [data.model.callback].concat(on[event]);
-        } else {
-            on[event] = data.model.callback;
-        }
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
     }
+  }
+};
 
-    /*  */
+var hooksToMerge = Object.keys(componentVNodeHooks);
 
-    var SIMPLE_NORMALIZE = 1;
-    var ALWAYS_NORMALIZE = 2;
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
 
-    // wrapper function for providing a more flexible interface
-    // without getting yelled at by flow
-    function createElement(
-        context,
-        tag,
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
         data,
-        children,
-        normalizationType,
-        alwaysNormalize
-    ) {
-        if (Array.isArray(data) || isPrimitive(data)) {
-            normalizationType = children;
-            children = data;
-            data = undefined;
-        }
-        if (isTrue(alwaysNormalize)) {
-            normalizationType = ALWAYS_NORMALIZE;
-        }
-        return _createElement(context, tag, data, children, normalizationType)
-    }
-
-    function _createElement(
         context,
-        tag,
-        data,
         children,
-        normalizationType
-    ) {
-        if (isDef(data) && isDef((data).__ob__)) {
-            "development" !== 'production' && warn(
-                "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-                'Always create fresh vnode data objects in each render!',
-                context
-            );
-            return createEmptyVNode()
-        }
-        // object syntax in v-bind
-        if (isDef(data) && isDef(data.is)) {
-            tag = data.is;
-        }
-        if (!tag) {
-            // in case of component :is set to falsy value
-            return createEmptyVNode()
-        }
-        // warn against non-primitive key
-        if ("development" !== 'production' &&
-            isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-        ) {
-            warn(
-                'Avoid using non-primitive value as key, ' +
-                'use string/number value instead.',
-                context
-            );
-        }
-        // support single function children as default scoped slot
-        if (Array.isArray(children) &&
-            typeof children[0] === 'function'
-        ) {
-            data = data || {};
-            data.scopedSlots = { default: children[0] };
-            children.length = 0;
-        }
-        if (normalizationType === ALWAYS_NORMALIZE) {
-            children = normalizeChildren(children);
-        } else if (normalizationType === SIMPLE_NORMALIZE) {
-            children = simpleNormalizeChildren(children);
-        }
-        var vnode, ns;
-        if (typeof tag === 'string') {
-            var Ctor;
-            ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-            if (config.isReservedTag(tag)) {
-                // platform built-in elements
-                vnode = new VNode(
-                    config.parsePlatformTagName(tag), data, children,
-                    undefined, undefined, context
-                );
-            } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-                // component
-                vnode = createComponent(Ctor, data, context, children, tag);
-            } else {
-                // unknown or unlisted namespaced elements
-                // check at runtime because it may get assigned a namespace when its
-                // parent normalizes children
-                vnode = new VNode(
-                    tag, data, children,
-                    undefined, undefined, context
-                );
-            }
-        } else {
-            // direct component options / constructor
-            vnode = createComponent(tag, data, context, children);
-        }
-        if (isDef(vnode)) {
-            if (ns) { applyNS(vnode, ns); }
-            return vnode
-        } else {
-            return createEmptyVNode()
-        }
+        tag
+      )
     }
+  }
 
-    function applyNS(vnode, ns, force) {
-        vnode.ns = ns;
-        if (vnode.tag === 'foreignObject') {
-            // use default namespace inside foreignObject
-            ns = undefined;
-            force = true;
-        }
-        if (isDef(vnode.children)) {
-            for (var i = 0, l = vnode.children.length; i < l; i++) {
-                var child = vnode.children[i];
-                if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-                    applyNS(child, ns, force);
-                }
-            }
-        }
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
     }
-
-    /*  */
-
-    function initRender(vm) {
-        vm._vnode = null; // the root of the child tree
-        var options = vm.$options;
-        var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-        var renderContext = parentVnode && parentVnode.context;
-        vm.$slots = resolveSlots(options._renderChildren, renderContext);
-        vm.$scopedSlots = emptyObject;
-        // bind the createElement fn to this instance
-        // so that we get proper render context inside it.
-        // args order: tag, data, children, normalizationType, alwaysNormalize
-        // internal version is used by render functions compiled from templates
-        vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-        // normalization is always applied for the public version, used in
-        // user-written render functions.
-        vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-        // $attrs & $listeners are exposed for easier HOC creation.
-        // they need to be reactive so that HOCs using them are always updated
-        var parentData = parentVnode && parentVnode.data;
-
-        /* istanbul ignore else */
-        {
-            defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-                !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-            }, true);
-            defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-                !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-            }, true);
-        }
-    }
-
-    function renderMixin(Vue) {
-        // install runtime convenience helpers
-        installRenderHelpers(Vue.prototype);
-
-        Vue.prototype.$nextTick = function (fn) {
-            return nextTick(fn, this)
-        };
-
-        Vue.prototype._render = function () {
-            var vm = this;
-            var ref = vm.$options;
-            var render = ref.render;
-            var _parentVnode = ref._parentVnode;
-
-            if (vm._isMounted) {
-                // if the parent didn't update, the slot nodes will be the ones from
-                // last render. They need to be cloned to ensure "freshness" for this render.
-                for (var key in vm.$slots) {
-                    var slot = vm.$slots[key];
-                    if (slot._rendered) {
-                        vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-                    }
-                }
-            }
-
-            vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-            // set parent vnode. this allows render functions to have access
-            // to the data on the placeholder node.
-            vm.$vnode = _parentVnode;
-            // render self
-            var vnode;
-            try {
-                vnode = render.call(vm._renderProxy, vm.$createElement);
-            } catch (e) {
-                handleError(e, vm, "render");
-                // return error render result,
-                // or previous vnode to prevent render error causing blank component
-                /* istanbul ignore else */
-                {
-                    if (vm.$options.renderError) {
-                        try {
-                            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-                        } catch (e) {
-                            handleError(e, vm, "renderError");
-                            vnode = vm._vnode;
-                        }
-                    } else {
-                        vnode = vm._vnode;
-                    }
-                }
-            }
-            // return empty vnode in case the render function errored out
-            if (!(vnode instanceof VNode)) {
-                if ("development" !== 'production' && Array.isArray(vnode)) {
-                    warn(
-                        'Multiple root nodes returned from render function. Render function ' +
-                        'should return a single root node.',
-                        vm
-                    );
-                }
-                vnode = createEmptyVNode();
-            }
-            // set parent
-            vnode.parent = _parentVnode;
-            return vnode
-        };
-    }
-
-    /*  */
-
-    var uid$1 = 0;
-
-    function initMixin(Vue) {
-        Vue.prototype._init = function (options) {
-            var vm = this;
-            // a uid
-            vm._uid = uid$1++;
-
-            var startTag, endTag;
-            /* istanbul ignore if */
-            if ("development" !== 'production' && config.performance && mark) {
-                startTag = "vue-perf-start:" + (vm._uid);
-                endTag = "vue-perf-end:" + (vm._uid);
-                mark(startTag);
-            }
-
-            // a flag to avoid this being observed
-            vm._isVue = true;
-            // merge options
-            if (options && options._isComponent) {
-                // optimize internal component instantiation
-                // since dynamic options merging is pretty slow, and none of the
-                // internal component options needs special treatment.
-                initInternalComponent(vm, options);
-            } else {
-                vm.$options = mergeOptions(
-                    resolveConstructorOptions(vm.constructor),
-                    options || {},
-                    vm
-                );
-            }
-            /* istanbul ignore else */
-            {
-                initProxy(vm);
-            }
-            // expose real self
-            vm._self = vm;
-            initLifecycle(vm);
-            initEvents(vm);
-            initRender(vm);
-            callHook(vm, 'beforeCreate');
-            initInjections(vm); // resolve injections before data/props
-            initState(vm);
-            initProvide(vm); // resolve provide after data/props
-            callHook(vm, 'created');
-
-            /* istanbul ignore if */
-            if ("development" !== 'production' && config.performance && mark) {
-                vm._name = formatComponentName(vm, false);
-                mark(endTag);
-                measure(("vue " + (vm._name) + " init"), startTag, endTag);
-            }
-
-            if (vm.$options.el) {
-                vm.$mount(vm.$options.el);
-            }
-        };
-    }
-
-    function initInternalComponent(vm, options) {
-        var opts = vm.$options = Object.create(vm.constructor.options);
-        // doing this because it's faster than dynamic enumeration.
-        opts.parent = options.parent;
-        opts.propsData = options.propsData;
-        opts._parentVnode = options._parentVnode;
-        opts._parentListeners = options._parentListeners;
-        opts._renderChildren = options._renderChildren;
-        opts._componentTag = options._componentTag;
-        opts._parentElm = options._parentElm;
-        opts._refElm = options._refElm;
-        if (options.render) {
-            opts.render = options.render;
-            opts.staticRenderFns = options.staticRenderFns;
-        }
-    }
-
-    function resolveConstructorOptions(Ctor) {
-        var options = Ctor.options;
-        if (Ctor.super) {
-            var superOptions = resolveConstructorOptions(Ctor.super);
-            var cachedSuperOptions = Ctor.superOptions;
-            if (superOptions !== cachedSuperOptions) {
-                // super option changed,
-                // need to resolve new options.
-                Ctor.superOptions = superOptions;
-                // check if there are any late-modified/attached options (#4976)
-                var modifiedOptions = resolveModifiedOptions(Ctor);
-                // update base extend options
-                if (modifiedOptions) {
-                    extend(Ctor.extendOptions, modifiedOptions);
-                }
-                options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-                if (options.name) {
-                    options.components[options.name] = Ctor;
-                }
-            }
-        }
-        return options
-    }
-
-    function resolveModifiedOptions(Ctor) {
-        var modified;
-        var latest = Ctor.options;
-        var extended = Ctor.extendOptions;
-        var sealed = Ctor.sealedOptions;
-        for (var key in latest) {
-            if (latest[key] !== sealed[key]) {
-                if (!modified) { modified = {}; }
-                modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-            }
-        }
-        return modified
-    }
-
-    function dedupe(latest, extended, sealed) {
-        // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-        // between merges
-        if (Array.isArray(latest)) {
-            var res = [];
-            sealed = Array.isArray(sealed) ? sealed : [sealed];
-            extended = Array.isArray(extended) ? extended : [extended];
-            for (var i = 0; i < latest.length; i++) {
-                // push original options and not sealed options to exclude duplicated options
-                if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-                    res.push(latest[i]);
-                }
-            }
-            return res
-        } else {
-            return latest
-        }
-    }
-
-    function Vue$3(options) {
-        if ("development" !== 'production' &&
-            !(this instanceof Vue$3)
-        ) {
-            warn('Vue is a constructor and should be called with the `new` keyword');
-        }
-        this._init(options);
-    }
-
-    initMixin(Vue$3);
-    stateMixin(Vue$3);
-    eventsMixin(Vue$3);
-    lifecycleMixin(Vue$3);
-    renderMixin(Vue$3);
-
-    /*  */
-
-    function initUse(Vue) {
-        Vue.use = function (plugin) {
-            var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-            if (installedPlugins.indexOf(plugin) > -1) {
-                return this
-            }
-
-            // additional parameters
-            var args = toArray(arguments, 1);
-            args.unshift(this);
-            if (typeof plugin.install === 'function') {
-                plugin.install.apply(plugin, args);
-            } else if (typeof plugin === 'function') {
-                plugin.apply(null, args);
-            }
-            installedPlugins.push(plugin);
-            return this
-        };
-    }
-
-    /*  */
-
-    function initMixin$1(Vue) {
-        Vue.mixin = function (mixin) {
-            this.options = mergeOptions(this.options, mixin);
-            return this
-        };
-    }
-
-    /*  */
-
-    function initExtend(Vue) {
-        /**
-         * Each instance constructor, including Vue, has a unique
-         * cid. This enables us to create wrapped "child
-         * constructors" for prototypal inheritance and cache them.
-         */
-        Vue.cid = 0;
-        var cid = 1;
-
-        /**
-         * Class inheritance
-         */
-        Vue.extend = function (extendOptions) {
-            extendOptions = extendOptions || {};
-            var Super = this;
-            var SuperId = Super.cid;
-            var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-            if (cachedCtors[SuperId]) {
-                return cachedCtors[SuperId]
-            }
-
-            var name = extendOptions.name || Super.options.name;
-            {
-                if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-                    warn(
-                        'Invalid component name: "' + name + '". Component names ' +
-                        'can only contain alphanumeric characters and the hyphen, ' +
-                        'and must start with a letter.'
-                    );
-                }
-            }
-
-            var Sub = function VueComponent(options) {
-                this._init(options);
-            };
-            Sub.prototype = Object.create(Super.prototype);
-            Sub.prototype.constructor = Sub;
-            Sub.cid = cid++;
-            Sub.options = mergeOptions(
-                Super.options,
-                extendOptions
-            );
-            Sub['super'] = Super;
-
-            // For props and computed properties, we define the proxy getters on
-            // the Vue instances at extension time, on the extended prototype. This
-            // avoids Object.defineProperty calls for each instance created.
-            if (Sub.options.props) {
-                initProps$1(Sub);
-            }
-            if (Sub.options.computed) {
-                initComputed$1(Sub);
-            }
-
-            // allow further extension/mixin/plugin usage
-            Sub.extend = Super.extend;
-            Sub.mixin = Super.mixin;
-            Sub.use = Super.use;
-
-            // create asset registers, so extended classes
-            // can have their private assets too.
-            ASSET_TYPES.forEach(function (type) {
-                Sub[type] = Super[type];
-            });
-            // enable recursive self-lookup
-            if (name) {
-                Sub.options.components[name] = Sub;
-            }
-
-            // keep a reference to the super options at extension time.
-            // later at instantiation we can check if Super's options have
-            // been updated.
-            Sub.superOptions = Super.options;
-            Sub.extendOptions = extendOptions;
-            Sub.sealedOptions = extend({}, Sub.options);
-
-            // cache constructor
-            cachedCtors[SuperId] = Sub;
-            return Sub
-        };
-    }
-
-    function initProps$1(Comp) {
-        var props = Comp.options.props;
-        for (var key in props) {
-            proxy(Comp.prototype, "_props", key);
-        }
-    }
-
-    function initComputed$1(Comp) {
-        var computed = Comp.options.computed;
-        for (var key in computed) {
-            defineComputed(Comp.prototype, key, computed[key]);
-        }
-    }
-
-    /*  */
-
-    function initAssetRegisters(Vue) {
-        /**
-         * Create asset registration methods.
-         */
-        ASSET_TYPES.forEach(function (type) {
-            Vue[type] = function (
-                id,
-                definition
-            ) {
-                if (!definition) {
-                    return this.options[type + 's'][id]
-                } else {
-                    /* istanbul ignore if */
-                    {
-                        if (type === 'component' && config.isReservedTag(id)) {
-                            warn(
-                                'Do not use built-in or reserved HTML elements as component ' +
-                                'id: ' + id
-                            );
-                        }
-                    }
-                    if (type === 'component' && isPlainObject(definition)) {
-                        definition.name = definition.name || id;
-                        definition = this.options._base.extend(definition);
-                    }
-                    if (type === 'directive' && typeof definition === 'function') {
-                        definition = { bind: definition, update: definition };
-                    }
-                    this.options[type + 's'][id] = definition;
-                    return definition
-                }
-            };
-        });
-    }
-
-    /*  */
-
-    function getComponentName(opts) {
-        return opts && (opts.Ctor.options.name || opts.tag)
-    }
-
-    function matches(pattern, name) {
-        if (Array.isArray(pattern)) {
-            return pattern.indexOf(name) > -1
-        } else if (typeof pattern === 'string') {
-            return pattern.split(',').indexOf(name) > -1
-        } else if (isRegExp(pattern)) {
-            return pattern.test(name)
-        }
-        /* istanbul ignore next */
-        return false
-    }
-
-    function pruneCache(keepAliveInstance, filter) {
-        var cache = keepAliveInstance.cache;
-        var keys = keepAliveInstance.keys;
-        var _vnode = keepAliveInstance._vnode;
-        for (var key in cache) {
-            var cachedNode = cache[key];
-            if (cachedNode) {
-                var name = getComponentName(cachedNode.componentOptions);
-                if (name && !filter(name)) {
-                    pruneCacheEntry(cache, key, keys, _vnode);
-                }
-            }
-        }
-    }
-
-    function pruneCacheEntry(
-        cache,
-        key,
-        keys,
-        current
-    ) {
-        var cached$$1 = cache[key];
-        if (cached$$1 && cached$$1 !== current) {
-            cached$$1.componentInstance.$destroy();
-        }
-        cache[key] = null;
-        remove(keys, key);
-    }
-
-    var patternTypes = [String, RegExp, Array];
-
-    var KeepAlive = {
-        name: 'keep-alive',
-        abstract: true,
-
-        props: {
-            include: patternTypes,
-            exclude: patternTypes,
-            max: [String, Number]
-        },
-
-        created: function created() {
-            this.cache = Object.create(null);
-            this.keys = [];
-        },
-
-        destroyed: function destroyed() {
-            var this$1 = this;
-
-            for (var key in this$1.cache) {
-                pruneCacheEntry(this$1.cache, key, this$1.keys);
-            }
-        },
-
-        watch: {
-            include: function include(val) {
-                pruneCache(this, function (name) { return matches(val, name); });
-            },
-            exclude: function exclude(val) {
-                pruneCache(this, function (name) { return !matches(val, name); });
-            }
-        },
-
-        render: function render() {
-            var vnode = getFirstComponentChild(this.$slots.default);
-            var componentOptions = vnode && vnode.componentOptions;
-            if (componentOptions) {
-                // check pattern
-                var name = getComponentName(componentOptions);
-                if (name && (
-                    (this.include && !matches(this.include, name)) ||
-                    (this.exclude && matches(this.exclude, name))
-                )) {
-                    return vnode
-                }
-
-                var ref = this;
-                var cache = ref.cache;
-                var keys = ref.keys;
-                var key = vnode.key == null
-                    // same constructor may get registered as different local components
-                    // so cid alone is not enough (#3269)
-                    ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
-                    : vnode.key;
-                if (cache[key]) {
-                    vnode.componentInstance = cache[key].componentInstance;
-                    // make current key freshest
-                    remove(keys, key);
-                    keys.push(key);
-                } else {
-                    cache[key] = vnode;
-                    keys.push(key);
-                    // prune oldest entry
-                    if (this.max && keys.length > parseInt(this.max)) {
-                        pruneCacheEntry(cache, keys[0], keys, this._vnode);
-                    }
-                }
-
-                vnode.data.keepAlive = true;
-            }
-            return vnode
-        }
-    };
-
-    var builtInComponents = {
-        KeepAlive: KeepAlive
-    };
-
-    /*  */
-
-    function initGlobalAPI(Vue) {
-        // config
-        var configDef = {};
-        configDef.get = function () { return config; };
-        {
-            configDef.set = function () {
-                warn(
-                    'Do not replace the Vue.config object, set individual fields instead.'
-                );
-            };
-        }
-        Object.defineProperty(Vue, 'config', configDef);
-
-        // exposed util methods.
-        // NOTE: these are not considered part of the public API - avoid relying on
-        // them unless you are aware of the risk.
-        Vue.util = {
-            warn: warn,
-            extend: extend,
-            mergeOptions: mergeOptions,
-            defineReactive: defineReactive
-        };
-
-        Vue.set = set;
-        Vue.delete = del;
-        Vue.nextTick = nextTick;
-
-        Vue.options = Object.create(null);
-        ASSET_TYPES.forEach(function (type) {
-            Vue.options[type + 's'] = Object.create(null);
-        });
-
-        // this is used to identify the "base" constructor to extend all plain-object
-        // components with in Weex's multi-instance scenarios.
-        Vue.options._base = Vue;
-
-        extend(Vue.options.components, builtInComponents);
-
-        initUse(Vue);
-        initMixin$1(Vue);
-        initExtend(Vue);
-        initAssetRegisters(Vue);
-    }
-
-    initGlobalAPI(Vue$3);
-
-    Object.defineProperty(Vue$3.prototype, '$isServer', {
-        get: isServerRendering
-    });
-
-    Object.defineProperty(Vue$3.prototype, '$ssrContext', {
-        get: function get() {
-            /* istanbul ignore next */
-            return this.$vnode && this.$vnode.ssrContext
-        }
-    });
-
-    Vue$3.version = '2.5.1';
-
-    /*  */
-
-    // these are reserved for web because they are directly compiled away
-    // during template compilation
-    var isReservedAttr = makeMap('style,class');
-
-    // attributes that should be using props for binding
-    var acceptValue = makeMap('input,textarea,option,select,progress');
-    var mustUseProp = function (tag, type, attr) {
-        return (
-            (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-            (attr === 'selected' && tag === 'option') ||
-            (attr === 'checked' && tag === 'input') ||
-            (attr === 'muted' && tag === 'video')
-        )
-    };
-
-    var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-    var isBooleanAttr = makeMap(
-        'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-        'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-        'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-        'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-        'required,reversed,scoped,seamless,selected,sortable,translate,' +
-        'truespeed,typemustmatch,visible'
+  }
+
+  // merge component management hooks onto the placeholder node
+  mergeHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  // Weex specific: invoke recycle-list optimized @render function for
+  // extracting cell-slot template.
+  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
+  /* istanbul ignore if */
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent, // activeInstance in lifecycle state
+  parentElm,
+  refElm
+) {
+  var options = {
+    _isComponent: true,
+    parent: parent,
+    _parentVnode: vnode,
+    _parentElm: parentElm || null,
+    _refElm: refElm || null
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function mergeHooks (data) {
+  if (!data.hook) {
+    data.hook = {};
+  }
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var fromParent = data.hook[key];
+    var ours = componentVNodeHooks[key];
+    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
+  }
+}
+
+function mergeHook$1 (one, two) {
+  return function (a, b, c, d) {
+    one(a, b, c, d);
+    two(a, b, c, d);
+  }
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  if (isDef(on[event])) {
+    on[event] = [data.model.callback].concat(on[event]);
+  } else {
+    on[event] = data.model.callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    "development" !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
     );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if ("development" !== 'production' &&
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (isDef(vnode)) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
 
-    var xlinkNS = 'http://www.w3.org/1999/xlink';
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
 
-    var isXlink = function (name) {
-        return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-    };
+/*  */
 
-    var getXlinkProp = function (name) {
-        return isXlink(name) ? name.slice(6, name.length) : ''
-    };
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
 
-    var isFalsyAttrValue = function (val) {
-        return val == null || val === false
-    };
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
 
-    /*  */
+  /* istanbul ignore else */
+  {
+    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  }
+}
 
-    function genClassForVnode(vnode) {
-        var data = vnode.data;
-        var parentNode = vnode;
-        var childNode = vnode;
-        while (isDef(childNode.componentInstance)) {
-            childNode = childNode.componentInstance._vnode;
-            if (childNode.data) {
-                data = mergeClassData(childNode.data, data);
-            }
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (vm._isMounted) {
+      // if the parent didn't update, the slot nodes will be the ones from
+      // last render. They need to be cloned to ensure "freshness" for this render.
+      for (var key in vm.$slots) {
+        var slot = vm.$slots[key];
+        // _rendered is a flag added by renderSlot, but may not be present
+        // if the slot is passed from manually written render functions
+        if (slot._rendered || (slot[0] && slot[0].elm)) {
+          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
         }
-        while (isDef(parentNode = parentNode.parent)) {
-            if (parentNode.data) {
-                data = mergeClassData(data, parentNode.data);
-            }
-        }
-        return renderClass(data.staticClass, data.class)
+      }
     }
 
-    function mergeClassData(child, parent) {
-        return {
-            staticClass: concat(child.staticClass, parent.staticClass),
-            class: isDef(child.class)
-                ? [child.class, parent.class]
-                : parent.class
-        }
-    }
+    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
 
-    function renderClass(
-        staticClass,
-        dynamicClass
-    ) {
-        if (isDef(staticClass) || isDef(dynamicClass)) {
-            return concat(staticClass, stringifyClass(dynamicClass))
-        }
-        /* istanbul ignore next */
-        return ''
-    }
-
-    function concat(a, b) {
-        return a ? b ? (a + ' ' + b) : a : (b || '')
-    }
-
-    function stringifyClass(value) {
-        if (Array.isArray(value)) {
-            return stringifyArray(value)
-        }
-        if (isObject(value)) {
-            return stringifyObject(value)
-        }
-        if (typeof value === 'string') {
-            return value
-        }
-        /* istanbul ignore next */
-        return ''
-    }
-
-    function stringifyArray(value) {
-        var res = '';
-        var stringified;
-        for (var i = 0, l = value.length; i < l; i++) {
-            if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-                if (res) { res += ' '; }
-                res += stringified;
-            }
-        }
-        return res
-    }
-
-    function stringifyObject(value) {
-        var res = '';
-        for (var key in value) {
-            if (value[key]) {
-                if (res) { res += ' '; }
-                res += key;
-            }
-        }
-        return res
-    }
-
-    /*  */
-
-    var namespaceMap = {
-        svg: 'http://www.w3.org/2000/svg',
-        math: 'http://www.w3.org/1998/Math/MathML'
-    };
-
-    var isHTMLTag = makeMap(
-        'html,body,base,head,link,meta,style,title,' +
-        'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-        'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-        'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-        's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-        'embed,object,param,source,canvas,script,noscript,del,ins,' +
-        'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-        'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-        'output,progress,select,textarea,' +
-        'details,dialog,menu,menuitem,summary,' +
-        'content,element,shadow,template,blockquote,iframe,tfoot'
-    );
-
-    // this map is intentionally selective, only covering SVG elements that may
-    // contain child elements.
-    var isSVG = makeMap(
-        'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-        'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-        'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-        true
-    );
-
-    var isPreTag = function (tag) { return tag === 'pre'; };
-
-    var isReservedTag = function (tag) {
-        return isHTMLTag(tag) || isSVG(tag)
-    };
-
-    function getTagNamespace(tag) {
-        if (isSVG(tag)) {
-            return 'svg'
-        }
-        // basic support for MathML
-        // note it doesn't support other MathML elements being component roots
-        if (tag === 'math') {
-            return 'math'
-        }
-    }
-
-    var unknownElementCache = Object.create(null);
-    function isUnknownElement(tag) {
-        /* istanbul ignore if */
-        if (!inBrowser) {
-            return true
-        }
-        if (isReservedTag(tag)) {
-            return false
-        }
-        tag = tag.toLowerCase();
-        /* istanbul ignore if */
-        if (unknownElementCache[tag] != null) {
-            return unknownElementCache[tag]
-        }
-        var el = document.createElement(tag);
-        if (tag.indexOf('-') > -1) {
-            // http://stackoverflow.com/a/28210364/1070244
-            return (unknownElementCache[tag] = (
-                el.constructor === window.HTMLUnknownElement ||
-                el.constructor === window.HTMLElement
-            ))
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      {
+        if (vm.$options.renderError) {
+          try {
+            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+          } catch (e) {
+            handleError(e, vm, "renderError");
+            vnode = vm._vnode;
+          }
         } else {
-            return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+          vnode = vm._vnode;
         }
+      }
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if ("development" !== 'production' && Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+var uid$1 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$1++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if ("development" !== 'production' && config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
     }
 
-    var isTextInputType = makeMap('text,number,password,search,email,tel,url');
-
-    /*  */
-
-    /**
-     * Query an element selector if it's not an element already.
-     */
-    function query(el) {
-        if (typeof el === 'string') {
-            var selected = document.querySelector(el);
-            if (!selected) {
-                "development" !== 'production' && warn(
-                    'Cannot find element: ' + el
-                );
-                return document.createElement('div')
-            }
-            return selected
-        } else {
-            return el
-        }
-    }
-
-    /*  */
-
-    function createElement$1(tagName, vnode) {
-        var elm = document.createElement(tagName);
-        if (tagName !== 'select') {
-            return elm
-        }
-        // false or null will remove the attribute but undefined will not
-        if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
-            elm.setAttribute('multiple', 'multiple');
-        }
-        return elm
-    }
-
-    function createElementNS(namespace, tagName) {
-        return document.createElementNS(namespaceMap[namespace], tagName)
-    }
-
-    function createTextNode(text) {
-        return document.createTextNode(text)
-    }
-
-    function createComment(text) {
-        return document.createComment(text)
-    }
-
-    function insertBefore(parentNode, newNode, referenceNode) {
-        parentNode.insertBefore(newNode, referenceNode);
-    }
-
-    function removeChild(node, child) {
-        node.removeChild(child);
-    }
-
-    function appendChild(node, child) {
-        node.appendChild(child);
-    }
-
-    function parentNode(node) {
-        return node.parentNode
-    }
-
-    function nextSibling(node) {
-        return node.nextSibling
-    }
-
-    function tagName(node) {
-        return node.tagName
-    }
-
-    function setTextContent(node, text) {
-        node.textContent = text;
-    }
-
-    function setAttribute(node, key, val) {
-        node.setAttribute(key, val);
-    }
-
-
-    var nodeOps = Object.freeze({
-        createElement: createElement$1,
-        createElementNS: createElementNS,
-        createTextNode: createTextNode,
-        createComment: createComment,
-        insertBefore: insertBefore,
-        removeChild: removeChild,
-        appendChild: appendChild,
-        parentNode: parentNode,
-        nextSibling: nextSibling,
-        tagName: tagName,
-        setTextContent: setTextContent,
-        setAttribute: setAttribute
-    });
-
-    /*  */
-
-    var ref = {
-        create: function create(_, vnode) {
-            registerRef(vnode);
-        },
-        update: function update(oldVnode, vnode) {
-            if (oldVnode.data.ref !== vnode.data.ref) {
-                registerRef(oldVnode, true);
-                registerRef(vnode);
-            }
-        },
-        destroy: function destroy(vnode) {
-            registerRef(vnode, true);
-        }
-    };
-
-    function registerRef(vnode, isRemoval) {
-        var key = vnode.data.ref;
-        if (!key) { return }
-
-        var vm = vnode.context;
-        var ref = vnode.componentInstance || vnode.elm;
-        var refs = vm.$refs;
-        if (isRemoval) {
-            if (Array.isArray(refs[key])) {
-                remove(refs[key], ref);
-            } else if (refs[key] === ref) {
-                refs[key] = undefined;
-            }
-        } else {
-            if (vnode.data.refInFor) {
-                if (!Array.isArray(refs[key])) {
-                    refs[key] = [ref];
-                } else if (refs[key].indexOf(ref) < 0) {
-                    // $flow-disable-line
-                    refs[key].push(ref);
-                }
-            } else {
-                refs[key] = ref;
-            }
-        }
-    }
-
-    /**
-     * Virtual DOM patching algorithm based on Snabbdom by
-     * Simon Friis Vindum (@paldepind)
-     * Licensed under the MIT License
-     * https://github.com/paldepind/snabbdom/blob/master/LICENSE
-     *
-     * modified by Evan You (@yyx990803)
-     *
-     * Not type-checking this because this file is perf-critical and the cost
-     * of making flow understand it is not worth it.
-     */
-
-    var emptyNode = new VNode('', {}, []);
-
-    var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
-
-    function sameVnode(a, b) {
-        return (
-            a.key === b.key && (
-                (
-                    a.tag === b.tag &&
-                    a.isComment === b.isComment &&
-                    isDef(a.data) === isDef(b.data) &&
-                    sameInputType(a, b)
-                ) || (
-                    isTrue(a.isAsyncPlaceholder) &&
-                    a.asyncFactory === b.asyncFactory &&
-                    isUndef(b.asyncFactory.error)
-                )
-            )
-        )
-    }
-
-    function sameInputType(a, b) {
-        if (a.tag !== 'input') { return true }
-        var i;
-        var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-        var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-        return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-    }
-
-    function createKeyToOldIdx(children, beginIdx, endIdx) {
-        var i, key;
-        var map = {};
-        for (i = beginIdx; i <= endIdx; ++i) {
-            key = children[i].key;
-            if (isDef(key)) { map[key] = i; }
-        }
-        return map
-    }
-
-    function createPatchFunction(backend) {
-        var i, j;
-        var cbs = {};
-
-        var modules = backend.modules;
-        var nodeOps = backend.nodeOps;
-
-        for (i = 0; i < hooks.length; ++i) {
-            cbs[hooks[i]] = [];
-            for (j = 0; j < modules.length; ++j) {
-                if (isDef(modules[j][hooks[i]])) {
-                    cbs[hooks[i]].push(modules[j][hooks[i]]);
-                }
-            }
-        }
-
-        function emptyNodeAt(elm) {
-            return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
-        }
-
-        function createRmCb(childElm, listeners) {
-            function remove() {
-                if (--remove.listeners === 0) {
-                    removeNode(childElm);
-                }
-            }
-            remove.listeners = listeners;
-            return remove
-        }
-
-        function removeNode(el) {
-            var parent = nodeOps.parentNode(el);
-            // element may have already been removed due to v-html / v-text
-            if (isDef(parent)) {
-                nodeOps.removeChild(parent, el);
-            }
-        }
-
-        var inPre = 0;
-        function createElm(vnode, insertedVnodeQueue, parentElm, refElm, nested) {
-            vnode.isRootInsert = !nested; // for transition enter check
-            if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
-                return
-            }
-
-            var data = vnode.data;
-            var children = vnode.children;
-            var tag = vnode.tag;
-            if (isDef(tag)) {
-                {
-                    if (data && data.pre) {
-                        inPre++;
-                    }
-                    if (
-                        !inPre &&
-                        !vnode.ns &&
-                        !(
-                            config.ignoredElements.length &&
-                            config.ignoredElements.some(function (ignore) {
-                                return isRegExp(ignore)
-                                    ? ignore.test(tag)
-                                    : ignore === tag
-                            })
-                        ) &&
-                        config.isUnknownElement(tag)
-                    ) {
-                        warn(
-                            'Unknown custom element: <' + tag + '> - did you ' +
-                            'register the component correctly? For recursive components, ' +
-                            'make sure to provide the "name" option.',
-                            vnode.context
-                        );
-                    }
-                }
-                vnode.elm = vnode.ns
-                    ? nodeOps.createElementNS(vnode.ns, tag)
-                    : nodeOps.createElement(tag, vnode);
-                setScope(vnode);
-
-                /* istanbul ignore if */
-                {
-                    createChildren(vnode, children, insertedVnodeQueue);
-                    if (isDef(data)) {
-                        invokeCreateHooks(vnode, insertedVnodeQueue);
-                    }
-                    insert(parentElm, vnode.elm, refElm);
-                }
-
-                if ("development" !== 'production' && data && data.pre) {
-                    inPre--;
-                }
-            } else if (isTrue(vnode.isComment)) {
-                vnode.elm = nodeOps.createComment(vnode.text);
-                insert(parentElm, vnode.elm, refElm);
-            } else {
-                vnode.elm = nodeOps.createTextNode(vnode.text);
-                insert(parentElm, vnode.elm, refElm);
-            }
-        }
-
-        function createComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
-            var i = vnode.data;
-            if (isDef(i)) {
-                var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
-                if (isDef(i = i.hook) && isDef(i = i.init)) {
-                    i(vnode, false /* hydrating */, parentElm, refElm);
-                }
-                // after calling the init hook, if the vnode is a child component
-                // it should've created a child instance and mounted it. the child
-                // component also has set the placeholder vnode's elm.
-                // in that case we can just return the element and be done.
-                if (isDef(vnode.componentInstance)) {
-                    initComponent(vnode, insertedVnodeQueue);
-                    if (isTrue(isReactivated)) {
-                        reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
-                    }
-                    return true
-                }
-            }
-        }
-
-        function initComponent(vnode, insertedVnodeQueue) {
-            if (isDef(vnode.data.pendingInsert)) {
-                insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
-                vnode.data.pendingInsert = null;
-            }
-            vnode.elm = vnode.componentInstance.$el;
-            if (isPatchable(vnode)) {
-                invokeCreateHooks(vnode, insertedVnodeQueue);
-                setScope(vnode);
-            } else {
-                // empty component root.
-                // skip all element-related modules except for ref (#3455)
-                registerRef(vnode);
-                // make sure to invoke the insert hook
-                insertedVnodeQueue.push(vnode);
-            }
-        }
-
-        function reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
-            var i;
-            // hack for #4339: a reactivated component with inner transition
-            // does not trigger because the inner node's created hooks are not called
-            // again. It's not ideal to involve module-specific logic in here but
-            // there doesn't seem to be a better way to do it.
-            var innerNode = vnode;
-            while (innerNode.componentInstance) {
-                innerNode = innerNode.componentInstance._vnode;
-                if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
-                    for (i = 0; i < cbs.activate.length; ++i) {
-                        cbs.activate[i](emptyNode, innerNode);
-                    }
-                    insertedVnodeQueue.push(innerNode);
-                    break
-                }
-            }
-            // unlike a newly created component,
-            // a reactivated keep-alive component doesn't insert itself
-            insert(parentElm, vnode.elm, refElm);
-        }
-
-        function insert(parent, elm, ref$$1) {
-            if (isDef(parent)) {
-                if (isDef(ref$$1)) {
-                    if (ref$$1.parentNode === parent) {
-                        nodeOps.insertBefore(parent, elm, ref$$1);
-                    }
-                } else {
-                    nodeOps.appendChild(parent, elm);
-                }
-            }
-        }
-
-        function createChildren(vnode, children, insertedVnodeQueue) {
-            if (Array.isArray(children)) {
-                for (var i = 0; i < children.length; ++i) {
-                    createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
-                }
-            } else if (isPrimitive(vnode.text)) {
-                nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(vnode.text));
-            }
-        }
-
-        function isPatchable(vnode) {
-            while (vnode.componentInstance) {
-                vnode = vnode.componentInstance._vnode;
-            }
-            return isDef(vnode.tag)
-        }
-
-        function invokeCreateHooks(vnode, insertedVnodeQueue) {
-            for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                cbs.create[i$1](emptyNode, vnode);
-            }
-            i = vnode.data.hook; // Reuse variable
-            if (isDef(i)) {
-                if (isDef(i.create)) { i.create(emptyNode, vnode); }
-                if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
-            }
-        }
-
-        // set scope id attribute for scoped CSS.
-        // this is implemented as a special case to avoid the overhead
-        // of going through the normal attribute patching process.
-        function setScope(vnode) {
-            var i;
-            if (isDef(i = vnode.functionalScopeId)) {
-                nodeOps.setAttribute(vnode.elm, i, '');
-            } else {
-                var ancestor = vnode;
-                while (ancestor) {
-                    if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-                        nodeOps.setAttribute(vnode.elm, i, '');
-                    }
-                    ancestor = ancestor.parent;
-                }
-            }
-            // for slot content they should also get the scopeId from the host instance.
-            if (isDef(i = activeInstance) &&
-                i !== vnode.context &&
-                i !== vnode.functionalContext &&
-                isDef(i = i.$options._scopeId)
-            ) {
-                nodeOps.setAttribute(vnode.elm, i, '');
-            }
-        }
-
-        function addVnodes(parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-            for (; startIdx <= endIdx; ++startIdx) {
-                createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
-            }
-        }
-
-        function invokeDestroyHook(vnode) {
-            var i, j;
-            var data = vnode.data;
-            if (isDef(data)) {
-                if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
-                for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
-            }
-            if (isDef(i = vnode.children)) {
-                for (j = 0; j < vnode.children.length; ++j) {
-                    invokeDestroyHook(vnode.children[j]);
-                }
-            }
-        }
-
-        function removeVnodes(parentElm, vnodes, startIdx, endIdx) {
-            for (; startIdx <= endIdx; ++startIdx) {
-                var ch = vnodes[startIdx];
-                if (isDef(ch)) {
-                    if (isDef(ch.tag)) {
-                        removeAndInvokeRemoveHook(ch);
-                        invokeDestroyHook(ch);
-                    } else { // Text node
-                        removeNode(ch.elm);
-                    }
-                }
-            }
-        }
-
-        function removeAndInvokeRemoveHook(vnode, rm) {
-            if (isDef(rm) || isDef(vnode.data)) {
-                var i;
-                var listeners = cbs.remove.length + 1;
-                if (isDef(rm)) {
-                    // we have a recursively passed down rm callback
-                    // increase the listeners count
-                    rm.listeners += listeners;
-                } else {
-                    // directly removing
-                    rm = createRmCb(vnode.elm, listeners);
-                }
-                // recursively invoke hooks on child component root node
-                if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
-                    removeAndInvokeRemoveHook(i, rm);
-                }
-                for (i = 0; i < cbs.remove.length; ++i) {
-                    cbs.remove[i](vnode, rm);
-                }
-                if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
-                    i(vnode, rm);
-                } else {
-                    rm();
-                }
-            } else {
-                removeNode(vnode.elm);
-            }
-        }
-
-        function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
-            var oldStartIdx = 0;
-            var newStartIdx = 0;
-            var oldEndIdx = oldCh.length - 1;
-            var oldStartVnode = oldCh[0];
-            var oldEndVnode = oldCh[oldEndIdx];
-            var newEndIdx = newCh.length - 1;
-            var newStartVnode = newCh[0];
-            var newEndVnode = newCh[newEndIdx];
-            var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
-
-            // removeOnly is a special flag used only by <transition-group>
-            // to ensure removed elements stay in correct relative positions
-            // during leaving transitions
-            var canMove = !removeOnly;
-
-            while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-                if (isUndef(oldStartVnode)) {
-                    oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-                } else if (isUndef(oldEndVnode)) {
-                    oldEndVnode = oldCh[--oldEndIdx];
-                } else if (sameVnode(oldStartVnode, newStartVnode)) {
-                    patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-                    oldStartVnode = oldCh[++oldStartIdx];
-                    newStartVnode = newCh[++newStartIdx];
-                } else if (sameVnode(oldEndVnode, newEndVnode)) {
-                    patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-                    oldEndVnode = oldCh[--oldEndIdx];
-                    newEndVnode = newCh[--newEndIdx];
-                } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-                    patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-                    canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
-                    oldStartVnode = oldCh[++oldStartIdx];
-                    newEndVnode = newCh[--newEndIdx];
-                } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-                    patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-                    canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
-                    oldEndVnode = oldCh[--oldEndIdx];
-                    newStartVnode = newCh[++newStartIdx];
-                } else {
-                    if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
-                    idxInOld = isDef(newStartVnode.key)
-                        ? oldKeyToIdx[newStartVnode.key]
-                        : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
-                    if (isUndef(idxInOld)) { // New element
-                        createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-                    } else {
-                        vnodeToMove = oldCh[idxInOld];
-                        /* istanbul ignore if */
-                        if ("development" !== 'production' && !vnodeToMove) {
-                            warn(
-                                'It seems there are duplicate keys that is causing an update error. ' +
-                                'Make sure each v-for item has a unique key.'
-                            );
-                        }
-                        if (sameVnode(vnodeToMove, newStartVnode)) {
-                            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
-                            oldCh[idxInOld] = undefined;
-                            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
-                        } else {
-                            // same key but different element. treat as new element
-                            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-                        }
-                    }
-                    newStartVnode = newCh[++newStartIdx];
-                }
-            }
-            if (oldStartIdx > oldEndIdx) {
-                refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-                addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-            } else if (newStartIdx > newEndIdx) {
-                removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-            }
-        }
-
-        function findIdxInOld(node, oldCh, start, end) {
-            for (var i = start; i < end; i++) {
-                var c = oldCh[i];
-                if (isDef(c) && sameVnode(node, c)) { return i }
-            }
-        }
-
-        function patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly) {
-            if (oldVnode === vnode) {
-                return
-            }
-
-            var elm = vnode.elm = oldVnode.elm;
-
-            if (isTrue(oldVnode.isAsyncPlaceholder)) {
-                if (isDef(vnode.asyncFactory.resolved)) {
-                    hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
-                } else {
-                    vnode.isAsyncPlaceholder = true;
-                }
-                return
-            }
-
-            // reuse element for static trees.
-            // note we only do this if the vnode is cloned -
-            // if the new node is not cloned it means the render functions have been
-            // reset by the hot-reload-api and we need to do a proper re-render.
-            if (isTrue(vnode.isStatic) &&
-                isTrue(oldVnode.isStatic) &&
-                vnode.key === oldVnode.key &&
-                (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
-            ) {
-                vnode.componentInstance = oldVnode.componentInstance;
-                return
-            }
-
-            var i;
-            var data = vnode.data;
-            if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-                i(oldVnode, vnode);
-            }
-
-            var oldCh = oldVnode.children;
-            var ch = vnode.children;
-            if (isDef(data) && isPatchable(vnode)) {
-                for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
-                if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
-            }
-            if (isUndef(vnode.text)) {
-                if (isDef(oldCh) && isDef(ch)) {
-                    if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
-                } else if (isDef(ch)) {
-                    if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
-                    addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-                } else if (isDef(oldCh)) {
-                    removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-                } else if (isDef(oldVnode.text)) {
-                    nodeOps.setTextContent(elm, '');
-                }
-            } else if (oldVnode.text !== vnode.text) {
-                nodeOps.setTextContent(elm, vnode.text);
-            }
-            if (isDef(data)) {
-                if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
-            }
-        }
-
-        function invokeInsertHook(vnode, queue, initial) {
-            // delay insert hooks for component root nodes, invoke them after the
-            // element is really inserted
-            if (isTrue(initial) && isDef(vnode.parent)) {
-                vnode.parent.data.pendingInsert = queue;
-            } else {
-                for (var i = 0; i < queue.length; ++i) {
-                    queue[i].data.hook.insert(queue[i]);
-                }
-            }
-        }
-
-        var bailed = false;
-        // list of modules that can skip create hook during hydration because they
-        // are already rendered on the client or has no need for initialization
-        var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
-
-        // Note: this is a browser-only function so we can assume elms are DOM nodes.
-        function hydrate(elm, vnode, insertedVnodeQueue) {
-            if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
-                vnode.elm = elm;
-                vnode.isAsyncPlaceholder = true;
-                return true
-            }
-            {
-                if (!assertNodeMatch(elm, vnode)) {
-                    return false
-                }
-            }
-            vnode.elm = elm;
-            var tag = vnode.tag;
-            var data = vnode.data;
-            var children = vnode.children;
-            if (isDef(data)) {
-                if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
-                if (isDef(i = vnode.componentInstance)) {
-                    // child component. it should have hydrated its own tree.
-                    initComponent(vnode, insertedVnodeQueue);
-                    return true
-                }
-            }
-            if (isDef(tag)) {
-                if (isDef(children)) {
-                    // empty element, allow client to pick up and populate children
-                    if (!elm.hasChildNodes()) {
-                        createChildren(vnode, children, insertedVnodeQueue);
-                    } else {
-                        // v-html and domProps: innerHTML
-                        if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
-                            if (i !== elm.innerHTML) {
-                                /* istanbul ignore if */
-                                if ("development" !== 'production' &&
-                                    typeof console !== 'undefined' &&
-                                    !bailed
-                                ) {
-                                    bailed = true;
-                                    console.warn('Parent: ', elm);
-                                    console.warn('server innerHTML: ', i);
-                                    console.warn('client innerHTML: ', elm.innerHTML);
-                                }
-                                return false
-                            }
-                        } else {
-                            // iterate and compare children lists
-                            var childrenMatch = true;
-                            var childNode = elm.firstChild;
-                            for (var i$1 = 0; i$1 < children.length; i$1++) {
-                                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
-                                    childrenMatch = false;
-                                    break
-                                }
-                                childNode = childNode.nextSibling;
-                            }
-                            // if childNode is not null, it means the actual childNodes list is
-                            // longer than the virtual children list.
-                            if (!childrenMatch || childNode) {
-                                /* istanbul ignore if */
-                                if ("development" !== 'production' &&
-                                    typeof console !== 'undefined' &&
-                                    !bailed
-                                ) {
-                                    bailed = true;
-                                    console.warn('Parent: ', elm);
-                                    console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
-                                }
-                                return false
-                            }
-                        }
-                    }
-                }
-                if (isDef(data)) {
-                    for (var key in data) {
-                        if (!isRenderedModule(key)) {
-                            invokeCreateHooks(vnode, insertedVnodeQueue);
-                            break
-                        }
-                    }
-                }
-            } else if (elm.data !== vnode.text) {
-                elm.data = vnode.text;
-            }
-            return true
-        }
-
-        function assertNodeMatch(node, vnode) {
-            if (isDef(vnode.tag)) {
-                return (
-                    vnode.tag.indexOf('vue-component') === 0 ||
-                    vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
-                )
-            } else {
-                return node.nodeType === (vnode.isComment ? 8 : 3)
-            }
-        }
-
-        return function patch(oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
-            if (isUndef(vnode)) {
-                if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
-                return
-            }
-
-            var isInitialPatch = false;
-            var insertedVnodeQueue = [];
-
-            if (isUndef(oldVnode)) {
-                // empty mount (likely as component), create new root element
-                isInitialPatch = true;
-                createElm(vnode, insertedVnodeQueue, parentElm, refElm);
-            } else {
-                var isRealElement = isDef(oldVnode.nodeType);
-                if (!isRealElement && sameVnode(oldVnode, vnode)) {
-                    // patch existing root node
-                    patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
-                } else {
-                    if (isRealElement) {
-                        // mounting to a real element
-                        // check if this is server-rendered content and if we can perform
-                        // a successful hydration.
-                        if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
-                            oldVnode.removeAttribute(SSR_ATTR);
-                            hydrating = true;
-                        }
-                        if (isTrue(hydrating)) {
-                            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
-                                invokeInsertHook(vnode, insertedVnodeQueue, true);
-                                return oldVnode
-                            } else {
-                                warn(
-                                    'The client-side rendered virtual DOM tree is not matching ' +
-                                    'server-rendered content. This is likely caused by incorrect ' +
-                                    'HTML markup, for example nesting block-level elements inside ' +
-                                    '<p>, or missing <tbody>. Bailing hydration and performing ' +
-                                    'full client-side render.'
-                                );
-                            }
-                        }
-                        // either not server-rendered, or hydration failed.
-                        // create an empty node and replace it
-                        oldVnode = emptyNodeAt(oldVnode);
-                    }
-                    // replacing existing element
-                    var oldElm = oldVnode.elm;
-                    var parentElm$1 = nodeOps.parentNode(oldElm);
-                    createElm(
-                        vnode,
-                        insertedVnodeQueue,
-                        // extremely rare edge case: do not insert if old element is in a
-                        // leaving transition. Only happens when combining transition +
-                        // keep-alive + HOCs. (#4590)
-                        oldElm._leaveCb ? null : parentElm$1,
-                        nodeOps.nextSibling(oldElm)
-                    );
-
-                    if (isDef(vnode.parent)) {
-                        // component root element replaced.
-                        // update parent placeholder node element, recursively
-                        var ancestor = vnode.parent;
-                        var patchable = isPatchable(vnode);
-                        while (ancestor) {
-                            for (var i = 0; i < cbs.destroy.length; ++i) {
-                                cbs.destroy[i](ancestor);
-                            }
-                            ancestor.elm = vnode.elm;
-                            if (patchable) {
-                                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                                    cbs.create[i$1](emptyNode, ancestor);
-                                }
-                                // #6513
-                                // invoke insert hooks that may have been merged by create hooks.
-                                // e.g. for directives that uses the "inserted" hook.
-                                var insert = ancestor.data.hook.insert;
-                                if (insert.merged) {
-                                    // start at index 1 to avoid re-invoking component mounted hook
-                                    for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
-                                        insert.fns[i$2]();
-                                    }
-                                }
-                            } else {
-                                registerRef(ancestor);
-                            }
-                            ancestor = ancestor.parent;
-                        }
-                    }
-
-                    if (isDef(parentElm$1)) {
-                        removeVnodes(parentElm$1, [oldVnode], 0, 0);
-                    } else if (isDef(oldVnode.tag)) {
-                        invokeDestroyHook(oldVnode);
-                    }
-                }
-            }
-
-            invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
-            return vnode.elm
-        }
-    }
-
-    /*  */
-
-    var directives = {
-        create: updateDirectives,
-        update: updateDirectives,
-        destroy: function unbindDirectives(vnode) {
-            updateDirectives(vnode, emptyNode);
-        }
-    };
-
-    function updateDirectives(oldVnode, vnode) {
-        if (oldVnode.data.directives || vnode.data.directives) {
-            _update(oldVnode, vnode);
-        }
-    }
-
-    function _update(oldVnode, vnode) {
-        var isCreate = oldVnode === emptyNode;
-        var isDestroy = vnode === emptyNode;
-        var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-        var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
-
-        var dirsWithInsert = [];
-        var dirsWithPostpatch = [];
-
-        var key, oldDir, dir;
-        for (key in newDirs) {
-            oldDir = oldDirs[key];
-            dir = newDirs[key];
-            if (!oldDir) {
-                // new directive, bind
-                callHook$1(dir, 'bind', vnode, oldVnode);
-                if (dir.def && dir.def.inserted) {
-                    dirsWithInsert.push(dir);
-                }
-            } else {
-                // existing directive, update
-                dir.oldValue = oldDir.value;
-                callHook$1(dir, 'update', vnode, oldVnode);
-                if (dir.def && dir.def.componentUpdated) {
-                    dirsWithPostpatch.push(dir);
-                }
-            }
-        }
-
-        if (dirsWithInsert.length) {
-            var callInsert = function () {
-                for (var i = 0; i < dirsWithInsert.length; i++) {
-                    callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
-                }
-            };
-            if (isCreate) {
-                mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert);
-            } else {
-                callInsert();
-            }
-        }
-
-        if (dirsWithPostpatch.length) {
-            mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
-                for (var i = 0; i < dirsWithPostpatch.length; i++) {
-                    callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
-                }
-            });
-        }
-
-        if (!isCreate) {
-            for (key in oldDirs) {
-                if (!newDirs[key]) {
-                    // no longer present, unbind
-                    callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
-                }
-            }
-        }
-    }
-
-    var emptyModifiers = Object.create(null);
-
-    function normalizeDirectives$1(
-        dirs,
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
         vm
-    ) {
-        var res = Object.create(null);
-        if (!dirs) {
-            return res
-        }
-        var i, dir;
-        for (i = 0; i < dirs.length; i++) {
-            dir = dirs[i];
-            if (!dir.modifiers) {
-                dir.modifiers = emptyModifiers;
-            }
-            res[getRawDirName(dir)] = dir;
-            dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
-        }
-        return res
+      );
     }
-
-    function getRawDirName(dir) {
-        return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+    /* istanbul ignore else */
+    {
+      initProxy(vm);
     }
-
-    function callHook$1(dir, hook, vnode, oldVnode, isDestroy) {
-        var fn = dir.def && dir.def[hook];
-        if (fn) {
-            try {
-                fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
-            } catch (e) {
-                handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
-            }
-        }
-    }
-
-    var baseModules = [
-        ref,
-        directives
-    ];
-
-    /*  */
-
-    function updateAttrs(oldVnode, vnode) {
-        var opts = vnode.componentOptions;
-        if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-            return
-        }
-        if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-            return
-        }
-        var key, cur, old;
-        var elm = vnode.elm;
-        var oldAttrs = oldVnode.data.attrs || {};
-        var attrs = vnode.data.attrs || {};
-        // clone observed objects, as the user probably wants to mutate it
-        if (isDef(attrs.__ob__)) {
-            attrs = vnode.data.attrs = extend({}, attrs);
-        }
-
-        for (key in attrs) {
-            cur = attrs[key];
-            old = oldAttrs[key];
-            if (old !== cur) {
-                setAttr(elm, key, cur);
-            }
-        }
-        // #4391: in IE9, setting type can reset value for input[type=radio]
-        // #6666: IE/Edge forces progress value down to 1 before setting a max
-        /* istanbul ignore if */
-        if ((isIE9 || isEdge) && attrs.value !== oldAttrs.value) {
-            setAttr(elm, 'value', attrs.value);
-        }
-        for (key in oldAttrs) {
-            if (isUndef(attrs[key])) {
-                if (isXlink(key)) {
-                    elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
-                } else if (!isEnumeratedAttr(key)) {
-                    elm.removeAttribute(key);
-                }
-            }
-        }
-    }
-
-    function setAttr(el, key, value) {
-        if (isBooleanAttr(key)) {
-            // set attribute for blank value
-            // e.g. <option disabled>Select one</option>
-            if (isFalsyAttrValue(value)) {
-                el.removeAttribute(key);
-            } else {
-                // technically allowfullscreen is a boolean attribute for <iframe>,
-                // but Flash expects a value of "true" when used on <embed> tag
-                value = key === 'allowfullscreen' && el.tagName === 'EMBED'
-                    ? 'true'
-                    : key;
-                el.setAttribute(key, value);
-            }
-        } else if (isEnumeratedAttr(key)) {
-            el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
-        } else if (isXlink(key)) {
-            if (isFalsyAttrValue(value)) {
-                el.removeAttributeNS(xlinkNS, getXlinkProp(key));
-            } else {
-                el.setAttributeNS(xlinkNS, key, value);
-            }
-        } else {
-            if (isFalsyAttrValue(value)) {
-                el.removeAttribute(key);
-            } else {
-                el.setAttribute(key, value);
-            }
-        }
-    }
-
-    var attrs = {
-        create: updateAttrs,
-        update: updateAttrs
-    };
-
-    /*  */
-
-    function updateClass(oldVnode, vnode) {
-        var el = vnode.elm;
-        var data = vnode.data;
-        var oldData = oldVnode.data;
-        if (
-            isUndef(data.staticClass) &&
-            isUndef(data.class) && (
-                isUndef(oldData) || (
-                    isUndef(oldData.staticClass) &&
-                    isUndef(oldData.class)
-                )
-            )
-        ) {
-            return
-        }
-
-        var cls = genClassForVnode(vnode);
-
-        // handle transition classes
-        var transitionClass = el._transitionClasses;
-        if (isDef(transitionClass)) {
-            cls = concat(cls, stringifyClass(transitionClass));
-        }
-
-        // set the class
-        if (cls !== el._prevClass) {
-            el.setAttribute('class', cls);
-            el._prevClass = cls;
-        }
-    }
-
-    var klass = {
-        create: updateClass,
-        update: updateClass
-    };
-
-    /*  */
-
-    var validDivisionCharRE = /[\w).+\-_$\]]/;
-
-    function parseFilters(exp) {
-        var inSingle = false;
-        var inDouble = false;
-        var inTemplateString = false;
-        var inRegex = false;
-        var curly = 0;
-        var square = 0;
-        var paren = 0;
-        var lastFilterIndex = 0;
-        var c, prev, i, expression, filters;
-
-        for (i = 0; i < exp.length; i++) {
-            prev = c;
-            c = exp.charCodeAt(i);
-            if (inSingle) {
-                if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
-            } else if (inDouble) {
-                if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
-            } else if (inTemplateString) {
-                if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
-            } else if (inRegex) {
-                if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
-            } else if (
-                c === 0x7C && // pipe
-                exp.charCodeAt(i + 1) !== 0x7C &&
-                exp.charCodeAt(i - 1) !== 0x7C &&
-                !curly && !square && !paren
-            ) {
-                if (expression === undefined) {
-                    // first filter, end of expression
-                    lastFilterIndex = i + 1;
-                    expression = exp.slice(0, i).trim();
-                } else {
-                    pushFilter();
-                }
-            } else {
-                switch (c) {
-                    case 0x22: inDouble = true; break         // "
-                    case 0x27: inSingle = true; break         // '
-                    case 0x60: inTemplateString = true; break // `
-                    case 0x28: paren++; break                 // (
-                    case 0x29: paren--; break                 // )
-                    case 0x5B: square++; break                // [
-                    case 0x5D: square--; break                // ]
-                    case 0x7B: curly++; break                 // {
-                    case 0x7D: curly--; break                 // }
-                }
-                if (c === 0x2f) { // /
-                    var j = i - 1;
-                    var p = (void 0);
-                    // find first non-whitespace prev char
-                    for (; j >= 0; j--) {
-                        p = exp.charAt(j);
-                        if (p !== ' ') { break }
-                    }
-                    if (!p || !validDivisionCharRE.test(p)) {
-                        inRegex = true;
-                    }
-                }
-            }
-        }
-
-        if (expression === undefined) {
-            expression = exp.slice(0, i).trim();
-        } else if (lastFilterIndex !== 0) {
-            pushFilter();
-        }
-
-        function pushFilter() {
-            (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
-            lastFilterIndex = i + 1;
-        }
-
-        if (filters) {
-            for (i = 0; i < filters.length; i++) {
-                expression = wrapFilter(expression, filters[i]);
-            }
-        }
-
-        return expression
-    }
-
-    function wrapFilter(exp, filter) {
-        var i = filter.indexOf('(');
-        if (i < 0) {
-            // _f: resolveFilter
-            return ("_f(\"" + filter + "\")(" + exp + ")")
-        } else {
-            var name = filter.slice(0, i);
-            var args = filter.slice(i + 1);
-            return ("_f(\"" + name + "\")(" + exp + "," + args)
-        }
-    }
-
-    /*  */
-
-    function baseWarn(msg) {
-        console.error(("[Vue compiler]: " + msg));
-    }
-
-    function pluckModuleFunction(
-        modules,
-        key
-    ) {
-        return modules
-            ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
-            : []
-    }
-
-    function addProp(el, name, value) {
-        (el.props || (el.props = [])).push({ name: name, value: value });
-    }
-
-    function addAttr(el, name, value) {
-        (el.attrs || (el.attrs = [])).push({ name: name, value: value });
-    }
-
-    function addDirective(
-        el,
-        name,
-        rawName,
-        value,
-        arg,
-        modifiers
-    ) {
-        (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
-    }
-
-    function addHandler(
-        el,
-        name,
-        value,
-        modifiers,
-        important,
-        warn
-    ) {
-        // warn prevent and passive modifier
-        /* istanbul ignore if */
-        if (
-            "development" !== 'production' && warn &&
-            modifiers && modifiers.prevent && modifiers.passive
-        ) {
-            warn(
-                'passive and prevent can\'t be used together. ' +
-                'Passive handler can\'t prevent default event.'
-            );
-        }
-        // check capture modifier
-        if (modifiers && modifiers.capture) {
-            delete modifiers.capture;
-            name = '!' + name; // mark the event as captured
-        }
-        if (modifiers && modifiers.once) {
-            delete modifiers.once;
-            name = '~' + name; // mark the event as once
-        }
-        /* istanbul ignore if */
-        if (modifiers && modifiers.passive) {
-            delete modifiers.passive;
-            name = '&' + name; // mark the event as passive
-        }
-        var events;
-        if (modifiers && modifiers.native) {
-            delete modifiers.native;
-            events = el.nativeEvents || (el.nativeEvents = {});
-        } else {
-            events = el.events || (el.events = {});
-        }
-        var newHandler = { value: value, modifiers: modifiers };
-        var handlers = events[name];
-        /* istanbul ignore if */
-        if (Array.isArray(handlers)) {
-            important ? handlers.unshift(newHandler) : handlers.push(newHandler);
-        } else if (handlers) {
-            events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
-        } else {
-            events[name] = newHandler;
-        }
-    }
-
-    function getBindingAttr(
-        el,
-        name,
-        getStatic
-    ) {
-        var dynamicValue =
-            getAndRemoveAttr(el, ':' + name) ||
-            getAndRemoveAttr(el, 'v-bind:' + name);
-        if (dynamicValue != null) {
-            return parseFilters(dynamicValue)
-        } else if (getStatic !== false) {
-            var staticValue = getAndRemoveAttr(el, name);
-            if (staticValue != null) {
-                return JSON.stringify(staticValue)
-            }
-        }
-    }
-
-    // note: this only removes the attr from the Array (attrsList) so that it
-    // doesn't get processed by processAttrs.
-    // By default it does NOT remove it from the map (attrsMap) because the map is
-    // needed during codegen.
-    function getAndRemoveAttr(
-        el,
-        name,
-        removeFromMap
-    ) {
-        var val;
-        if ((val = el.attrsMap[name]) != null) {
-            var list = el.attrsList;
-            for (var i = 0, l = list.length; i < l; i++) {
-                if (list[i].name === name) {
-                    list.splice(i, 1);
-                    break
-                }
-            }
-        }
-        if (removeFromMap) {
-            delete el.attrsMap[name];
-        }
-        return val
-    }
-
-    /*  */
-
-    /**
-     * Cross-platform code generation for component v-model
-     */
-    function genComponentModel(
-        el,
-        value,
-        modifiers
-    ) {
-        var ref = modifiers || {};
-        var number = ref.number;
-        var trim = ref.trim;
-
-        var baseValueExpression = '$$v';
-        var valueExpression = baseValueExpression;
-        if (trim) {
-            valueExpression =
-                "(typeof " + baseValueExpression + " === 'string'" +
-                "? " + baseValueExpression + ".trim()" +
-                ": " + baseValueExpression + ")";
-        }
-        if (number) {
-            valueExpression = "_n(" + valueExpression + ")";
-        }
-        var assignment = genAssignmentCode(value, valueExpression);
-
-        el.model = {
-            value: ("(" + value + ")"),
-            expression: ("\"" + value + "\""),
-            callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
-        };
-    }
-
-    /**
-     * Cross-platform codegen helper for generating v-model value assignment code.
-     */
-    function genAssignmentCode(
-        value,
-        assignment
-    ) {
-        var res = parseModel(value);
-        if (res.key === null) {
-            return (value + "=" + assignment)
-        } else {
-            return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
-        }
-    }
-
-    /**
-     * Parse a v-model expression into a base path and a final key segment.
-     * Handles both dot-path and possible square brackets.
-     *
-     * Possible cases:
-     *
-     * - test
-     * - test[key]
-     * - test[test1[key]]
-     * - test["a"][key]
-     * - xxx.test[a[a].test1[key]]
-     * - test.xxx.a["asa"][test1[key]]
-     *
-     */
-
-    var len;
-    var str;
-    var chr;
-    var index$1;
-    var expressionPos;
-    var expressionEndPos;
-
-
-
-    function parseModel(val) {
-        len = val.length;
-
-        if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
-            index$1 = val.lastIndexOf('.');
-            if (index$1 > -1) {
-                return {
-                    exp: val.slice(0, index$1),
-                    key: '"' + val.slice(index$1 + 1) + '"'
-                }
-            } else {
-                return {
-                    exp: val,
-                    key: null
-                }
-            }
-        }
-
-        str = val;
-        index$1 = expressionPos = expressionEndPos = 0;
-
-        while (!eof()) {
-            chr = next();
-            /* istanbul ignore if */
-            if (isStringStart(chr)) {
-                parseString(chr);
-            } else if (chr === 0x5B) {
-                parseBracket(chr);
-            }
-        }
-
-        return {
-            exp: val.slice(0, expressionPos),
-            key: val.slice(expressionPos + 1, expressionEndPos)
-        }
-    }
-
-    function next() {
-        return str.charCodeAt(++index$1)
-    }
-
-    function eof() {
-        return index$1 >= len
-    }
-
-    function isStringStart(chr) {
-        return chr === 0x22 || chr === 0x27
-    }
-
-    function parseBracket(chr) {
-        var inBracket = 1;
-        expressionPos = index$1;
-        while (!eof()) {
-            chr = next();
-            if (isStringStart(chr)) {
-                parseString(chr);
-                continue
-            }
-            if (chr === 0x5B) { inBracket++; }
-            if (chr === 0x5D) { inBracket--; }
-            if (inBracket === 0) {
-                expressionEndPos = index$1;
-                break
-            }
-        }
-    }
-
-    function parseString(chr) {
-        var stringQuote = chr;
-        while (!eof()) {
-            chr = next();
-            if (chr === stringQuote) {
-                break
-            }
-        }
-    }
-
-    /*  */
-
-    var warn$1;
-
-    // in some cases, the event used has to be determined at runtime
-    // so we used some reserved tokens during compile.
-    var RANGE_TOKEN = '__r';
-    var CHECKBOX_RADIO_TOKEN = '__c';
-
-    function model(
-        el,
-        dir,
-        _warn
-    ) {
-        warn$1 = _warn;
-        var value = dir.value;
-        var modifiers = dir.modifiers;
-        var tag = el.tag;
-        var type = el.attrsMap.type;
-
-        {
-            // inputs with type="file" are read only and setting the input's
-            // value will throw an error.
-            if (tag === 'input' && type === 'file') {
-                warn$1(
-                    "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-                    "File inputs are read only. Use a v-on:change listener instead."
-                );
-            }
-        }
-
-        if (el.component) {
-            genComponentModel(el, value, modifiers);
-            // component v-model doesn't need extra runtime
-            return false
-        } else if (tag === 'select') {
-            genSelect(el, value, modifiers);
-        } else if (tag === 'input' && type === 'checkbox') {
-            genCheckboxModel(el, value, modifiers);
-        } else if (tag === 'input' && type === 'radio') {
-            genRadioModel(el, value, modifiers);
-        } else if (tag === 'input' || tag === 'textarea') {
-            genDefaultModel(el, value, modifiers);
-        } else if (!config.isReservedTag(tag)) {
-            genComponentModel(el, value, modifiers);
-            // component v-model doesn't need extra runtime
-            return false
-        } else {
-            warn$1(
-                "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-                "v-model is not supported on this element type. " +
-                'If you are working with contenteditable, it\'s recommended to ' +
-                'wrap a library dedicated for that purpose inside a custom component.'
-            );
-        }
-
-        // ensure runtime directive metadata
-        return true
-    }
-
-    function genCheckboxModel(
-        el,
-        value,
-        modifiers
-    ) {
-        var number = modifiers && modifiers.number;
-        var valueBinding = getBindingAttr(el, 'value') || 'null';
-        var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-        var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
-        addProp(el, 'checked',
-            "Array.isArray(" + value + ")" +
-            "?_i(" + value + "," + valueBinding + ")>-1" + (
-                trueValueBinding === 'true'
-                    ? (":(" + value + ")")
-                    : (":_q(" + value + "," + trueValueBinding + ")")
-            )
-        );
-        addHandler(el, 'change',
-            "var $$a=" + value + "," +
-            '$$el=$event.target,' +
-            "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
-            'if(Array.isArray($$a)){' +
-            "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
-            '$$i=_i($$a,$$v);' +
-            "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-            "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
-            "}else{" + (genAssignmentCode(value, '$$c')) + "}",
-            null, true
-        );
-    }
-
-    function genRadioModel(
-        el,
-        value,
-        modifiers
-    ) {
-        var number = modifiers && modifiers.number;
-        var valueBinding = getBindingAttr(el, 'value') || 'null';
-        valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
-        addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
-        addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-    }
-
-    function genSelect(
-        el,
-        value,
-        modifiers
-    ) {
-        var number = modifiers && modifiers.number;
-        var selectedVal = "Array.prototype.filter" +
-            ".call($event.target.options,function(o){return o.selected})" +
-            ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
-            "return " + (number ? '_n(val)' : 'val') + "})";
-
-        var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-        var code = "var $$selectedVal = " + selectedVal + ";";
-        code = code + " " + (genAssignmentCode(value, assignment));
-        addHandler(el, 'change', code, null, true);
-    }
-
-    function genDefaultModel(
-        el,
-        value,
-        modifiers
-    ) {
-        var type = el.attrsMap.type;
-        var ref = modifiers || {};
-        var lazy = ref.lazy;
-        var number = ref.number;
-        var trim = ref.trim;
-        var needCompositionGuard = !lazy && type !== 'range';
-        var event = lazy
-            ? 'change'
-            : type === 'range'
-                ? RANGE_TOKEN
-                : 'input';
-
-        var valueExpression = '$event.target.value';
-        if (trim) {
-            valueExpression = "$event.target.value.trim()";
-        }
-        if (number) {
-            valueExpression = "_n(" + valueExpression + ")";
-        }
-
-        var code = genAssignmentCode(value, valueExpression);
-        if (needCompositionGuard) {
-            code = "if($event.target.composing)return;" + code;
-        }
-
-        addProp(el, 'value', ("(" + value + ")"));
-        addHandler(el, event, code, null, true);
-        if (trim || number) {
-            addHandler(el, 'blur', '$forceUpdate()');
-        }
-    }
-
-    /*  */
-
-    // normalize v-model event tokens that can only be determined at runtime.
-    // it's important to place the event as the first in the array because
-    // the whole point is ensuring the v-model callback gets called before
-    // user-attached handlers.
-    function normalizeEvents(on) {
-        /* istanbul ignore if */
-        if (isDef(on[RANGE_TOKEN])) {
-            // IE input[type=range] only supports `change` event
-            var event = isIE ? 'change' : 'input';
-            on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
-            delete on[RANGE_TOKEN];
-        }
-        // This was originally intended to fix #4521 but no longer necessary
-        // after 2.5. Keeping it for backwards compat with generated code from < 2.4
-        /* istanbul ignore if */
-        if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
-            on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
-            delete on[CHECKBOX_RADIO_TOKEN];
-        }
-    }
-
-    var target$1;
-
-    function add$1(
-        event,
-        handler,
-        once$$1,
-        capture,
-        passive
-    ) {
-        if (once$$1) {
-            var oldHandler = handler;
-            var _target = target$1; // save current target element in closure
-            handler = function (ev) {
-                var res = arguments.length === 1
-                    ? oldHandler(ev)
-                    : oldHandler.apply(null, arguments);
-                if (res !== null) {
-                    remove$2(event, handler, capture, _target);
-                }
-            };
-        }
-        target$1.addEventListener(
-            event,
-            handler,
-            supportsPassive
-                ? { capture: capture, passive: passive }
-                : capture
-        );
-    }
-
-    function remove$2(
-        event,
-        handler,
-        capture,
-        _target
-    ) {
-        (_target || target$1).removeEventListener(event, handler, capture);
-    }
-
-    function updateDOMListeners(oldVnode, vnode) {
-        if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
-            return
-        }
-        var on = vnode.data.on || {};
-        var oldOn = oldVnode.data.on || {};
-        target$1 = vnode.elm;
-        normalizeEvents(on);
-        updateListeners(on, oldOn, add$1, remove$2, vnode.context);
-    }
-
-    var events = {
-        create: updateDOMListeners,
-        update: updateDOMListeners
-    };
-
-    /*  */
-
-    function updateDOMProps(oldVnode, vnode) {
-        if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-            return
-        }
-        var key, cur;
-        var elm = vnode.elm;
-        var oldProps = oldVnode.data.domProps || {};
-        var props = vnode.data.domProps || {};
-        // clone observed objects, as the user probably wants to mutate it
-        if (isDef(props.__ob__)) {
-            props = vnode.data.domProps = extend({}, props);
-        }
-
-        for (key in oldProps) {
-            if (isUndef(props[key])) {
-                elm[key] = '';
-            }
-        }
-        for (key in props) {
-            cur = props[key];
-            // ignore children if the node has textContent or innerHTML,
-            // as these will throw away existing DOM nodes and cause removal errors
-            // on subsequent patches (#3360)
-            if (key === 'textContent' || key === 'innerHTML') {
-                if (vnode.children) { vnode.children.length = 0; }
-                if (cur === oldProps[key]) { continue }
-                // #6601 work around Chrome version <= 55 bug where single textNode
-                // replaced by innerHTML/textContent retains its parentNode property
-                if (elm.childNodes.length === 1) {
-                    elm.removeChild(elm.childNodes[0]);
-                }
-            }
-
-            if (key === 'value') {
-                // store value as _value as well since
-                // non-string values will be stringified
-                elm._value = cur;
-                // avoid resetting cursor position when value is the same
-                var strCur = isUndef(cur) ? '' : String(cur);
-                if (shouldUpdateValue(elm, strCur)) {
-                    elm.value = strCur;
-                }
-            } else {
-                elm[key] = cur;
-            }
-        }
-    }
-
-    // check platforms/web/util/attrs.js acceptValue
-
-
-    function shouldUpdateValue(elm, checkVal) {
-        return (!elm.composing && (
-            elm.tagName === 'OPTION' ||
-            isDirty(elm, checkVal) ||
-            isInputChanged(elm, checkVal)
-        ))
-    }
-
-    function isDirty(elm, checkVal) {
-        // return true when textbox (.number and .trim) loses focus and its value is
-        // not equal to the updated value
-        var notInFocus = true;
-        // #6157
-        // work around IE bug when accessing document.activeElement in an iframe
-        try { notInFocus = document.activeElement !== elm; } catch (e) { }
-        return notInFocus && elm.value !== checkVal
-    }
-
-    function isInputChanged(elm, newVal) {
-        var value = elm.value;
-        var modifiers = elm._vModifiers; // injected by v-model runtime
-        if (isDef(modifiers) && modifiers.number) {
-            return toNumber(value) !== toNumber(newVal)
-        }
-        if (isDef(modifiers) && modifiers.trim) {
-            return value.trim() !== newVal.trim()
-        }
-        return value !== newVal
-    }
-
-    var domProps = {
-        create: updateDOMProps,
-        update: updateDOMProps
-    };
-
-    /*  */
-
-    var parseStyleText = cached(function (cssText) {
-        var res = {};
-        var listDelimiter = /;(?![^(]*\))/g;
-        var propertyDelimiter = /:(.+)/;
-        cssText.split(listDelimiter).forEach(function (item) {
-            if (item) {
-                var tmp = item.split(propertyDelimiter);
-                tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
-            }
-        });
-        return res
-    });
-
-    // merge static and dynamic style data on the same vnode
-    function normalizeStyleData(data) {
-        var style = normalizeStyleBinding(data.style);
-        // static style is pre-processed into an object during compilation
-        // and is always a fresh object, so it's safe to merge into it
-        return data.staticStyle
-            ? extend(data.staticStyle, style)
-            : style
-    }
-
-    // normalize possible array / string values into Object
-    function normalizeStyleBinding(bindingStyle) {
-        if (Array.isArray(bindingStyle)) {
-            return toObject(bindingStyle)
-        }
-        if (typeof bindingStyle === 'string') {
-            return parseStyleText(bindingStyle)
-        }
-        return bindingStyle
-    }
-
-    /**
-     * parent component style should be after child's
-     * so that parent component's style could override it
-     */
-    function getStyle(vnode, checkChild) {
-        var res = {};
-        var styleData;
-
-        if (checkChild) {
-            var childNode = vnode;
-            while (childNode.componentInstance) {
-                childNode = childNode.componentInstance._vnode;
-                if (childNode.data && (styleData = normalizeStyleData(childNode.data))) {
-                    extend(res, styleData);
-                }
-            }
-        }
-
-        if ((styleData = normalizeStyleData(vnode.data))) {
-            extend(res, styleData);
-        }
-
-        var parentNode = vnode;
-        while ((parentNode = parentNode.parent)) {
-            if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-                extend(res, styleData);
-            }
-        }
-        return res
-    }
-
-    /*  */
-
-    var cssVarRE = /^--/;
-    var importantRE = /\s*!important$/;
-    var setProp = function (el, name, val) {
-        /* istanbul ignore if */
-        if (cssVarRE.test(name)) {
-            el.style.setProperty(name, val);
-        } else if (importantRE.test(val)) {
-            el.style.setProperty(name, val.replace(importantRE, ''), 'important');
-        } else {
-            var normalizedName = normalize(name);
-            if (Array.isArray(val)) {
-                // Support values array created by autoprefixer, e.g.
-                // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
-                // Set them one by one, and the browser will only set those it can recognize
-                for (var i = 0, len = val.length; i < len; i++) {
-                    el.style[normalizedName] = val[i];
-                }
-            } else {
-                el.style[normalizedName] = val;
-            }
-        }
-    };
-
-    var vendorNames = ['Webkit', 'Moz', 'ms'];
-
-    var emptyStyle;
-    var normalize = cached(function (prop) {
-        emptyStyle = emptyStyle || document.createElement('div').style;
-        prop = camelize(prop);
-        if (prop !== 'filter' && (prop in emptyStyle)) {
-            return prop
-        }
-        var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-        for (var i = 0; i < vendorNames.length; i++) {
-            var name = vendorNames[i] + capName;
-            if (name in emptyStyle) {
-                return name
-            }
-        }
-    });
-
-    function updateStyle(oldVnode, vnode) {
-        var data = vnode.data;
-        var oldData = oldVnode.data;
-
-        if (isUndef(data.staticStyle) && isUndef(data.style) &&
-            isUndef(oldData.staticStyle) && isUndef(oldData.style)
-        ) {
-            return
-        }
-
-        var cur, name;
-        var el = vnode.elm;
-        var oldStaticStyle = oldData.staticStyle;
-        var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-        // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-        var oldStyle = oldStaticStyle || oldStyleBinding;
-
-        var style = normalizeStyleBinding(vnode.data.style) || {};
-
-        // store normalized style under a different key for next diff
-        // make sure to clone it if it's reactive, since the user likely wants
-        // to mutate it.
-        vnode.data.normalizedStyle = isDef(style.__ob__)
-            ? extend({}, style)
-            : style;
-
-        var newStyle = getStyle(vnode, true);
-
-        for (name in oldStyle) {
-            if (isUndef(newStyle[name])) {
-                setProp(el, name, '');
-            }
-        }
-        for (name in newStyle) {
-            cur = newStyle[name];
-            if (cur !== oldStyle[name]) {
-                // ie9 setting to null has no effect, must use empty string
-                setProp(el, name, cur == null ? '' : cur);
-            }
-        }
-    }
-
-    var style = {
-        create: updateStyle,
-        update: updateStyle
-    };
-
-    /*  */
-
-    /**
-     * Add class with compatibility for SVG since classList is not supported on
-     * SVG elements in IE
-     */
-    function addClass(el, cls) {
-        /* istanbul ignore if */
-        if (!cls || !(cls = cls.trim())) {
-            return
-        }
-
-        /* istanbul ignore else */
-        if (el.classList) {
-            if (cls.indexOf(' ') > -1) {
-                cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
-            } else {
-                el.classList.add(cls);
-            }
-        } else {
-            var cur = " " + (el.getAttribute('class') || '') + " ";
-            if (cur.indexOf(' ' + cls + ' ') < 0) {
-                el.setAttribute('class', (cur + cls).trim());
-            }
-        }
-    }
-
-    /**
-     * Remove class with compatibility for SVG since classList is not supported on
-     * SVG elements in IE
-     */
-    function removeClass(el, cls) {
-        /* istanbul ignore if */
-        if (!cls || !(cls = cls.trim())) {
-            return
-        }
-
-        /* istanbul ignore else */
-        if (el.classList) {
-            if (cls.indexOf(' ') > -1) {
-                cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
-            } else {
-                el.classList.remove(cls);
-            }
-            if (!el.classList.length) {
-                el.removeAttribute('class');
-            }
-        } else {
-            var cur = " " + (el.getAttribute('class') || '') + " ";
-            var tar = ' ' + cls + ' ';
-            while (cur.indexOf(tar) >= 0) {
-                cur = cur.replace(tar, ' ');
-            }
-            cur = cur.trim();
-            if (cur) {
-                el.setAttribute('class', cur);
-            } else {
-                el.removeAttribute('class');
-            }
-        }
-    }
-
-    /*  */
-
-    function resolveTransition(def) {
-        if (!def) {
-            return
-        }
-        /* istanbul ignore else */
-        if (typeof def === 'object') {
-            var res = {};
-            if (def.css !== false) {
-                extend(res, autoCssTransition(def.name || 'v'));
-            }
-            extend(res, def);
-            return res
-        } else if (typeof def === 'string') {
-            return autoCssTransition(def)
-        }
-    }
-
-    var autoCssTransition = cached(function (name) {
-        return {
-            enterClass: (name + "-enter"),
-            enterToClass: (name + "-enter-to"),
-            enterActiveClass: (name + "-enter-active"),
-            leaveClass: (name + "-leave"),
-            leaveToClass: (name + "-leave-to"),
-            leaveActiveClass: (name + "-leave-active")
-        }
-    });
-
-    var hasTransition = inBrowser && !isIE9;
-    var TRANSITION = 'transition';
-    var ANIMATION = 'animation';
-
-    // Transition property/event sniffing
-    var transitionProp = 'transition';
-    var transitionEndEvent = 'transitionend';
-    var animationProp = 'animation';
-    var animationEndEvent = 'animationend';
-    if (hasTransition) {
-        /* istanbul ignore if */
-        if (window.ontransitionend === undefined &&
-            window.onwebkittransitionend !== undefined
-        ) {
-            transitionProp = 'WebkitTransition';
-            transitionEndEvent = 'webkitTransitionEnd';
-        }
-        if (window.onanimationend === undefined &&
-            window.onwebkitanimationend !== undefined
-        ) {
-            animationProp = 'WebkitAnimation';
-            animationEndEvent = 'webkitAnimationEnd';
-        }
-    }
-
-    // binding to window is necessary to make hot reload work in IE in strict mode
-    var raf = inBrowser
-        ? window.requestAnimationFrame
-            ? window.requestAnimationFrame.bind(window)
-            : setTimeout
-        : /* istanbul ignore next */ function (fn) { return fn(); };
-
-    function nextFrame(fn) {
-        raf(function () {
-            raf(fn);
-        });
-    }
-
-    function addTransitionClass(el, cls) {
-        var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
-        if (transitionClasses.indexOf(cls) < 0) {
-            transitionClasses.push(cls);
-            addClass(el, cls);
-        }
-    }
-
-    function removeTransitionClass(el, cls) {
-        if (el._transitionClasses) {
-            remove(el._transitionClasses, cls);
-        }
-        removeClass(el, cls);
-    }
-
-    function whenTransitionEnds(
-        el,
-        expectedType,
-        cb
-    ) {
-        var ref = getTransitionInfo(el, expectedType);
-        var type = ref.type;
-        var timeout = ref.timeout;
-        var propCount = ref.propCount;
-        if (!type) { return cb() }
-        var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-        var ended = 0;
-        var end = function () {
-            el.removeEventListener(event, onEnd);
-            cb();
-        };
-        var onEnd = function (e) {
-            if (e.target === el) {
-                if (++ended >= propCount) {
-                    end();
-                }
-            }
-        };
-        setTimeout(function () {
-            if (ended < propCount) {
-                end();
-            }
-        }, timeout + 1);
-        el.addEventListener(event, onEnd);
-    }
-
-    var transformRE = /\b(transform|all)(,|$)/;
-
-    function getTransitionInfo(el, expectedType) {
-        var styles = window.getComputedStyle(el);
-        var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-        var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
-        var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-        var animationDelays = styles[animationProp + 'Delay'].split(', ');
-        var animationDurations = styles[animationProp + 'Duration'].split(', ');
-        var animationTimeout = getTimeout(animationDelays, animationDurations);
-
-        var type;
-        var timeout = 0;
-        var propCount = 0;
-        /* istanbul ignore if */
-        if (expectedType === TRANSITION) {
-            if (transitionTimeout > 0) {
-                type = TRANSITION;
-                timeout = transitionTimeout;
-                propCount = transitionDurations.length;
-            }
-        } else if (expectedType === ANIMATION) {
-            if (animationTimeout > 0) {
-                type = ANIMATION;
-                timeout = animationTimeout;
-                propCount = animationDurations.length;
-            }
-        } else {
-            timeout = Math.max(transitionTimeout, animationTimeout);
-            type = timeout > 0
-                ? transitionTimeout > animationTimeout
-                    ? TRANSITION
-                    : ANIMATION
-                : null;
-            propCount = type
-                ? type === TRANSITION
-                    ? transitionDurations.length
-                    : animationDurations.length
-                : 0;
-        }
-        var hasTransform =
-            type === TRANSITION &&
-            transformRE.test(styles[transitionProp + 'Property']);
-        return {
-            type: type,
-            timeout: timeout,
-            propCount: propCount,
-            hasTransform: hasTransform
-        }
-    }
-
-    function getTimeout(delays, durations) {
-        /* istanbul ignore next */
-        while (delays.length < durations.length) {
-            delays = delays.concat(delays);
-        }
-
-        return Math.max.apply(null, durations.map(function (d, i) {
-            return toMs(d) + toMs(delays[i])
-        }))
-    }
-
-    function toMs(s) {
-        return Number(s.slice(0, -1)) * 1000
-    }
-
-    /*  */
-
-    function enter(vnode, toggleDisplay) {
-        var el = vnode.elm;
-
-        // call leave callback now
-        if (isDef(el._leaveCb)) {
-            el._leaveCb.cancelled = true;
-            el._leaveCb();
-        }
-
-        var data = resolveTransition(vnode.data.transition);
-        if (isUndef(data)) {
-            return
-        }
-
-        /* istanbul ignore if */
-        if (isDef(el._enterCb) || el.nodeType !== 1) {
-            return
-        }
-
-        var css = data.css;
-        var type = data.type;
-        var enterClass = data.enterClass;
-        var enterToClass = data.enterToClass;
-        var enterActiveClass = data.enterActiveClass;
-        var appearClass = data.appearClass;
-        var appearToClass = data.appearToClass;
-        var appearActiveClass = data.appearActiveClass;
-        var beforeEnter = data.beforeEnter;
-        var enter = data.enter;
-        var afterEnter = data.afterEnter;
-        var enterCancelled = data.enterCancelled;
-        var beforeAppear = data.beforeAppear;
-        var appear = data.appear;
-        var afterAppear = data.afterAppear;
-        var appearCancelled = data.appearCancelled;
-        var duration = data.duration;
-
-        // activeInstance will always be the <transition> component managing this
-        // transition. One edge case to check is when the <transition> is placed
-        // as the root node of a child component. In that case we need to check
-        // <transition>'s parent for appear check.
-        var context = activeInstance;
-        var transitionNode = activeInstance.$vnode;
-        while (transitionNode && transitionNode.parent) {
-            transitionNode = transitionNode.parent;
-            context = transitionNode.context;
-        }
-
-        var isAppear = !context._isMounted || !vnode.isRootInsert;
-
-        if (isAppear && !appear && appear !== '') {
-            return
-        }
-
-        var startClass = isAppear && appearClass
-            ? appearClass
-            : enterClass;
-        var activeClass = isAppear && appearActiveClass
-            ? appearActiveClass
-            : enterActiveClass;
-        var toClass = isAppear && appearToClass
-            ? appearToClass
-            : enterToClass;
-
-        var beforeEnterHook = isAppear
-            ? (beforeAppear || beforeEnter)
-            : beforeEnter;
-        var enterHook = isAppear
-            ? (typeof appear === 'function' ? appear : enter)
-            : enter;
-        var afterEnterHook = isAppear
-            ? (afterAppear || afterEnter)
-            : afterEnter;
-        var enterCancelledHook = isAppear
-            ? (appearCancelled || enterCancelled)
-            : enterCancelled;
-
-        var explicitEnterDuration = toNumber(
-            isObject(duration)
-                ? duration.enter
-                : duration
-        );
-
-        if ("development" !== 'production' && explicitEnterDuration != null) {
-            checkDuration(explicitEnterDuration, 'enter', vnode);
-        }
-
-        var expectsCSS = css !== false && !isIE9;
-        var userWantsControl = getHookArgumentsLength(enterHook);
-
-        var cb = el._enterCb = once(function () {
-            if (expectsCSS) {
-                removeTransitionClass(el, toClass);
-                removeTransitionClass(el, activeClass);
-            }
-            if (cb.cancelled) {
-                if (expectsCSS) {
-                    removeTransitionClass(el, startClass);
-                }
-                enterCancelledHook && enterCancelledHook(el);
-            } else {
-                afterEnterHook && afterEnterHook(el);
-            }
-            el._enterCb = null;
-        });
-
-        if (!vnode.data.show) {
-            // remove pending leave element on enter by injecting an insert hook
-            mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', function () {
-                var parent = el.parentNode;
-                var pendingNode = parent && parent._pending && parent._pending[vnode.key];
-                if (pendingNode &&
-                    pendingNode.tag === vnode.tag &&
-                    pendingNode.elm._leaveCb
-                ) {
-                    pendingNode.elm._leaveCb();
-                }
-                enterHook && enterHook(el, cb);
-            });
-        }
-
-        // start enter transition
-        beforeEnterHook && beforeEnterHook(el);
-        if (expectsCSS) {
-            addTransitionClass(el, startClass);
-            addTransitionClass(el, activeClass);
-            nextFrame(function () {
-                addTransitionClass(el, toClass);
-                removeTransitionClass(el, startClass);
-                if (!cb.cancelled && !userWantsControl) {
-                    if (isValidDuration(explicitEnterDuration)) {
-                        setTimeout(cb, explicitEnterDuration);
-                    } else {
-                        whenTransitionEnds(el, type, cb);
-                    }
-                }
-            });
-        }
-
-        if (vnode.data.show) {
-            toggleDisplay && toggleDisplay();
-            enterHook && enterHook(el, cb);
-        }
-
-        if (!expectsCSS && !userWantsControl) {
-            cb();
-        }
-    }
-
-    function leave(vnode, rm) {
-        var el = vnode.elm;
-
-        // call enter callback now
-        if (isDef(el._enterCb)) {
-            el._enterCb.cancelled = true;
-            el._enterCb();
-        }
-
-        var data = resolveTransition(vnode.data.transition);
-        if (isUndef(data)) {
-            return rm()
-        }
-
-        /* istanbul ignore if */
-        if (isDef(el._leaveCb) || el.nodeType !== 1) {
-            return
-        }
-
-        var css = data.css;
-        var type = data.type;
-        var leaveClass = data.leaveClass;
-        var leaveToClass = data.leaveToClass;
-        var leaveActiveClass = data.leaveActiveClass;
-        var beforeLeave = data.beforeLeave;
-        var leave = data.leave;
-        var afterLeave = data.afterLeave;
-        var leaveCancelled = data.leaveCancelled;
-        var delayLeave = data.delayLeave;
-        var duration = data.duration;
-
-        var expectsCSS = css !== false && !isIE9;
-        var userWantsControl = getHookArgumentsLength(leave);
-
-        var explicitLeaveDuration = toNumber(
-            isObject(duration)
-                ? duration.leave
-                : duration
-        );
-
-        if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
-            checkDuration(explicitLeaveDuration, 'leave', vnode);
-        }
-
-        var cb = el._leaveCb = once(function () {
-            if (el.parentNode && el.parentNode._pending) {
-                el.parentNode._pending[vnode.key] = null;
-            }
-            if (expectsCSS) {
-                removeTransitionClass(el, leaveToClass);
-                removeTransitionClass(el, leaveActiveClass);
-            }
-            if (cb.cancelled) {
-                if (expectsCSS) {
-                    removeTransitionClass(el, leaveClass);
-                }
-                leaveCancelled && leaveCancelled(el);
-            } else {
-                rm();
-                afterLeave && afterLeave(el);
-            }
-            el._leaveCb = null;
-        });
-
-        if (delayLeave) {
-            delayLeave(performLeave);
-        } else {
-            performLeave();
-        }
-
-        function performLeave() {
-            // the delayed leave may have already been cancelled
-            if (cb.cancelled) {
-                return
-            }
-            // record leaving element
-            if (!vnode.data.show) {
-                (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
-            }
-            beforeLeave && beforeLeave(el);
-            if (expectsCSS) {
-                addTransitionClass(el, leaveClass);
-                addTransitionClass(el, leaveActiveClass);
-                nextFrame(function () {
-                    addTransitionClass(el, leaveToClass);
-                    removeTransitionClass(el, leaveClass);
-                    if (!cb.cancelled && !userWantsControl) {
-                        if (isValidDuration(explicitLeaveDuration)) {
-                            setTimeout(cb, explicitLeaveDuration);
-                        } else {
-                            whenTransitionEnds(el, type, cb);
-                        }
-                    }
-                });
-            }
-            leave && leave(el, cb);
-            if (!expectsCSS && !userWantsControl) {
-                cb();
-            }
-        }
-    }
-
-    // only used in dev mode
-    function checkDuration(val, name, vnode) {
-        if (typeof val !== 'number') {
-            warn(
-                "<transition> explicit " + name + " duration is not a valid number - " +
-                "got " + (JSON.stringify(val)) + ".",
-                vnode.context
-            );
-        } else if (isNaN(val)) {
-            warn(
-                "<transition> explicit " + name + " duration is NaN - " +
-                'the duration expression might be incorrect.',
-                vnode.context
-            );
-        }
-    }
-
-    function isValidDuration(val) {
-        return typeof val === 'number' && !isNaN(val)
-    }
-
-    /**
-     * Normalize a transition hook's argument length. The hook may be:
-     * - a merged hook (invoker) with the original in .fns
-     * - a wrapped component method (check ._length)
-     * - a plain function (.length)
-     */
-    function getHookArgumentsLength(fn) {
-        if (isUndef(fn)) {
-            return false
-        }
-        var invokerFns = fn.fns;
-        if (isDef(invokerFns)) {
-            // invoker
-            return getHookArgumentsLength(
-                Array.isArray(invokerFns)
-                    ? invokerFns[0]
-                    : invokerFns
-            )
-        } else {
-            return (fn._length || fn.length) > 1
-        }
-    }
-
-    function _enter(_, vnode) {
-        if (vnode.data.show !== true) {
-            enter(vnode);
-        }
-    }
-
-    var transition = inBrowser ? {
-        create: _enter,
-        activate: _enter,
-        remove: function remove$$1(vnode, rm) {
-            /* istanbul ignore else */
-            if (vnode.data.show !== true) {
-                leave(vnode, rm);
-            } else {
-                rm();
-            }
-        }
-    } : {};
-
-    var platformModules = [
-        attrs,
-        klass,
-        events,
-        domProps,
-        style,
-        transition
-    ];
-
-    /*  */
-
-    // the directive module should be applied last, after all
-    // built-in modules have been applied.
-    var modules = platformModules.concat(baseModules);
-
-    var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
-
-    /**
-     * Not type checking this file because flow doesn't like attaching
-     * properties to Elements.
-     */
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
 
     /* istanbul ignore if */
-    if (isIE9) {
-        // http://www.matts411.com/post/internet-explorer-9-oninput/
-        document.addEventListener('selectionchange', function () {
-            var el = document.activeElement;
-            if (el && el.vmodel) {
-                trigger(el, 'input');
-            }
-        });
+    if ("development" !== 'production' && config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
     }
 
-    var model$1 = {
-        inserted: function inserted(el, binding, vnode) {
-            if (vnode.tag === 'select') {
-                setSelected(el, binding, vnode.context);
-                el._vOptions = [].map.call(el.options, getValue);
-            } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
-                el._vModifiers = binding.modifiers;
-                if (!binding.modifiers.lazy) {
-                    // Safari < 10.2 & UIWebView doesn't fire compositionend when
-                    // switching focus before confirming composition choice
-                    // this also fixes the issue where some browsers e.g. iOS Chrome
-                    // fires "change" instead of "input" on autocomplete.
-                    el.addEventListener('change', onCompositionEnd);
-                    if (!isAndroid) {
-                        el.addEventListener('compositionstart', onCompositionStart);
-                        el.addEventListener('compositionend', onCompositionEnd);
-                    }
-                    /* istanbul ignore if */
-                    if (isIE9) {
-                        el.vmodel = true;
-                    }
-                }
-            }
-        },
-        componentUpdated: function componentUpdated(el, binding, vnode) {
-            if (vnode.tag === 'select') {
-                setSelected(el, binding, vnode.context);
-                // in case the options rendered by v-for have changed,
-                // it's possible that the value is out-of-sync with the rendered options.
-                // detect such cases and filter out values that no longer has a matching
-                // option in the DOM.
-                var prevOptions = el._vOptions;
-                var curOptions = el._vOptions = [].map.call(el.options, getValue);
-                if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
-                    // trigger change event if
-                    // no matching option found for at least one value
-                    var needReset = el.multiple
-                        ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
-                        : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
-                    if (needReset) {
-                        trigger(el, 'change');
-                    }
-                }
-            }
-        }
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+  opts._parentElm = options._parentElm;
+  opts._refElm = options._refElm;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var extended = Ctor.extendOptions;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+    }
+  }
+  return modified
+}
+
+function dedupe (latest, extended, sealed) {
+  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
+  // between merges
+  if (Array.isArray(latest)) {
+    var res = [];
+    sealed = Array.isArray(sealed) ? sealed : [sealed];
+    extended = Array.isArray(extended) ? extended : [extended];
+    for (var i = 0; i < latest.length; i++) {
+      // push original options and not sealed options to exclude duplicated options
+      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
+        res.push(latest[i]);
+      }
+    }
+    return res
+  } else {
+    return latest
+  }
+}
+
+function Vue$3 (options) {
+  if ("development" !== 'production' &&
+    !(this instanceof Vue$3)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue$3);
+stateMixin(Vue$3);
+eventsMixin(Vue$3);
+lifecycleMixin(Vue$3);
+renderMixin(Vue$3);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if ("development" !== 'production' && name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
     };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
 
-    function setSelected(el, binding, vm) {
-        actuallySetSelected(el, binding, vm);
-        /* istanbul ignore if */
-        if (isIE || isEdge) {
-            setTimeout(function () {
-                actuallySetSelected(el, binding, vm);
-            }, 0);
-        }
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
     }
 
-    function actuallySetSelected(el, binding, vm) {
-        var value = binding.value;
-        var isMultiple = el.multiple;
-        if (isMultiple && !Array.isArray(value)) {
-            "development" !== 'production' && warn(
-                "<select multiple v-model=\"" + (binding.expression) + "\"> " +
-                "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
-                vm
-            );
-            return
-        }
-        var selected, option;
-        for (var i = 0, l = el.options.length; i < l; i++) {
-            option = el.options[i];
-            if (isMultiple) {
-                selected = looseIndexOf(value, getValue(option)) > -1;
-                if (option.selected !== selected) {
-                    option.selected = selected;
-                }
-            } else {
-                if (looseEqual(getValue(option), value)) {
-                    if (el.selectedIndex !== i) {
-                        el.selectedIndex = i;
-                    }
-                    return
-                }
-            }
-        }
-        if (!isMultiple) {
-            el.selectedIndex = -1;
-        }
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
     }
 
-    function hasNoMatchingOption(value, options) {
-        return options.every(function (o) { return !looseEqual(o, value); })
-    }
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
 
-    function getValue(option) {
-        return '_value' in option
-            ? option._value
-            : option.value
-    }
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
 
-    function onCompositionStart(e) {
-        e.target.composing = true;
-    }
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
 
-    function onCompositionEnd(e) {
-        // prevent triggering an input event for no reason
-        if (!e.target.composing) { return }
-        e.target.composing = false;
-        trigger(e.target, 'input');
-    }
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
 
-    function trigger(el, type) {
-        var e = document.createEvent('HTMLEvents');
-        e.initEvent(type, true, true);
-        el.dispatchEvent(e);
-    }
+/*  */
 
-    /*  */
-
-    // recursively search for possible transition defined inside the component root
-    function locateNode(vnode) {
-        return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
-            ? locateNode(vnode.componentInstance._vnode)
-            : vnode
-    }
-
-    var show = {
-        bind: function bind(el, ref, vnode) {
-            var value = ref.value;
-
-            vnode = locateNode(vnode);
-            var transition$$1 = vnode.data && vnode.data.transition;
-            var originalDisplay = el.__vOriginalDisplay =
-                el.style.display === 'none' ? '' : el.style.display;
-            if (value && transition$$1) {
-                vnode.data.show = true;
-                enter(vnode, function () {
-                    el.style.display = originalDisplay;
-                });
-            } else {
-                el.style.display = value ? originalDisplay : 'none';
-            }
-        },
-
-        update: function update(el, ref, vnode) {
-            var value = ref.value;
-            var oldValue = ref.oldValue;
-
-            /* istanbul ignore if */
-            if (value === oldValue) { return }
-            vnode = locateNode(vnode);
-            var transition$$1 = vnode.data && vnode.data.transition;
-            if (transition$$1) {
-                vnode.data.show = true;
-                if (value) {
-                    enter(vnode, function () {
-                        el.style.display = el.__vOriginalDisplay;
-                    });
-                } else {
-                    leave(vnode, function () {
-                        el.style.display = 'none';
-                    });
-                }
-            } else {
-                el.style.display = value ? el.__vOriginalDisplay : 'none';
-            }
-        },
-
-        unbind: function unbind(
-            el,
-            binding,
-            vnode,
-            oldVnode,
-            isDestroy
-        ) {
-            if (!isDestroy) {
-                el.style.display = el.__vOriginalDisplay;
-            }
-        }
-    };
-
-    var platformDirectives = {
-        model: model$1,
-        show: show
-    };
-
-    /*  */
-
-    // Provides transition support for a single element/component.
-    // supports transition mode (out-in / in-out)
-
-    var transitionProps = {
-        name: String,
-        appear: Boolean,
-        css: Boolean,
-        mode: String,
-        type: String,
-        enterClass: String,
-        leaveClass: String,
-        enterToClass: String,
-        leaveToClass: String,
-        enterActiveClass: String,
-        leaveActiveClass: String,
-        appearClass: String,
-        appearActiveClass: String,
-        appearToClass: String,
-        duration: [Number, String, Object]
-    };
-
-    // in case the child is also an abstract component, e.g. <keep-alive>
-    // we want to recursively retrieve the real component to be rendered
-    function getRealChild(vnode) {
-        var compOptions = vnode && vnode.componentOptions;
-        if (compOptions && compOptions.Ctor.options.abstract) {
-            return getRealChild(getFirstComponentChild(compOptions.children))
-        } else {
-            return vnode
-        }
-    }
-
-    function extractTransitionData(comp) {
-        var data = {};
-        var options = comp.$options;
-        // props
-        for (var key in options.propsData) {
-            data[key] = comp[key];
-        }
-        // events.
-        // extract listeners and pass them directly to the transition methods
-        var listeners = options._parentListeners;
-        for (var key$1 in listeners) {
-            data[camelize(key$1)] = listeners[key$1];
-        }
-        return data
-    }
-
-    function placeholder(h, rawChild) {
-        if (/\d-keep-alive$/.test(rawChild.tag)) {
-            return h('keep-alive', {
-                props: rawChild.componentOptions.propsData
-            })
-        }
-    }
-
-    function hasParentTransition(vnode) {
-        while ((vnode = vnode.parent)) {
-            if (vnode.data.transition) {
-                return true
-            }
-        }
-    }
-
-    function isSameChild(child, oldChild) {
-        return oldChild.key === child.key && oldChild.tag === child.tag
-    }
-
-    var Transition = {
-        name: 'transition',
-        props: transitionProps,
-        abstract: true,
-
-        render: function render(h) {
-            var this$1 = this;
-
-            var children = this.$options._renderChildren;
-            if (!children) {
-                return
-            }
-
-            // filter out text nodes (possible whitespaces)
-            children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
-            /* istanbul ignore if */
-            if (!children.length) {
-                return
-            }
-
-            // warn multiple elements
-            if ("development" !== 'production' && children.length > 1) {
-                warn(
-                    '<transition> can only be used on a single element. Use ' +
-                    '<transition-group> for lists.',
-                    this.$parent
-                );
-            }
-
-            var mode = this.mode;
-
-            // warn invalid mode
-            if ("development" !== 'production' &&
-                mode && mode !== 'in-out' && mode !== 'out-in'
-            ) {
-                warn(
-                    'invalid <transition> mode: ' + mode,
-                    this.$parent
-                );
-            }
-
-            var rawChild = children[0];
-
-            // if this is a component root node and the component's
-            // parent container node also has transition, skip.
-            if (hasParentTransition(this.$vnode)) {
-                return rawChild
-            }
-
-            // apply transition data to child
-            // use getRealChild() to ignore abstract components e.g. keep-alive
-            var child = getRealChild(rawChild);
-            /* istanbul ignore if */
-            if (!child) {
-                return rawChild
-            }
-
-            if (this._leaving) {
-                return placeholder(h, rawChild)
-            }
-
-            // ensure a key that is unique to the vnode type and to this transition
-            // component instance. This key will be used to remove pending leaving nodes
-            // during entering.
-            var id = "__transition-" + (this._uid) + "-";
-            child.key = child.key == null
-                ? child.isComment
-                    ? id + 'comment'
-                    : id + child.tag
-                : isPrimitive(child.key)
-                    ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-                    : child.key;
-
-            var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-            var oldRawChild = this._vnode;
-            var oldChild = getRealChild(oldRawChild);
-
-            // mark v-show
-            // so that the transition module can hand over the control to the directive
-            if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
-                child.data.show = true;
-            }
-
-            if (
-                oldChild &&
-                oldChild.data &&
-                !isSameChild(child, oldChild) &&
-                !isAsyncPlaceholder(oldChild)
-            ) {
-                // replace old child transition data with fresh one
-                // important for dynamic transitions!
-                var oldData = oldChild.data.transition = extend({}, data);
-                // handle transition mode
-                if (mode === 'out-in') {
-                    // return placeholder node and queue update when leave finishes
-                    this._leaving = true;
-                    mergeVNodeHook(oldData, 'afterLeave', function () {
-                        this$1._leaving = false;
-                        this$1.$forceUpdate();
-                    });
-                    return placeholder(h, rawChild)
-                } else if (mode === 'in-out') {
-                    if (isAsyncPlaceholder(child)) {
-                        return oldRawChild
-                    }
-                    var delayedLeave;
-                    var performLeave = function () { delayedLeave(); };
-                    mergeVNodeHook(data, 'afterEnter', performLeave);
-                    mergeVNodeHook(data, 'enterCancelled', performLeave);
-                    mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
-                }
-            }
-
-            return rawChild
-        }
-    };
-
-    /*  */
-
-    // Provides transition support for list items.
-    // supports move transitions using the FLIP technique.
-
-    // Because the vdom's children update algorithm is "unstable" - i.e.
-    // it doesn't guarantee the relative positioning of removed elements,
-    // we force transition-group to update its children into two passes:
-    // in the first pass, we remove all nodes that need to be removed,
-    // triggering their leaving transition; in the second pass, we insert/move
-    // into the final desired state. This way in the second pass removed
-    // nodes will remain where they should be.
-
-    var props = extend({
-        tag: String,
-        moveClass: String
-    }, transitionProps);
-
-    delete props.mode;
-
-    var TransitionGroup = {
-        props: props,
-
-        render: function render(h) {
-            var tag = this.tag || this.$vnode.data.tag || 'span';
-            var map = Object.create(null);
-            var prevChildren = this.prevChildren = this.children;
-            var rawChildren = this.$slots.default || [];
-            var children = this.children = [];
-            var transitionData = extractTransitionData(this);
-
-            for (var i = 0; i < rawChildren.length; i++) {
-                var c = rawChildren[i];
-                if (c.tag) {
-                    if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
-                        children.push(c);
-                        map[c.key] = c
-                            ; (c.data || (c.data = {})).transition = transitionData;
-                    } else {
-                        var opts = c.componentOptions;
-                        var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-                        warn(("<transition-group> children must be keyed: <" + name + ">"));
-                    }
-                }
-            }
-
-            if (prevChildren) {
-                var kept = [];
-                var removed = [];
-                for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
-                    var c$1 = prevChildren[i$1];
-                    c$1.data.transition = transitionData;
-                    c$1.data.pos = c$1.elm.getBoundingClientRect();
-                    if (map[c$1.key]) {
-                        kept.push(c$1);
-                    } else {
-                        removed.push(c$1);
-                    }
-                }
-                this.kept = h(tag, null, kept);
-                this.removed = removed;
-            }
-
-            return h(tag, null, children)
-        },
-
-        beforeUpdate: function beforeUpdate() {
-            // force removing pass
-            this.__patch__(
-                this._vnode,
-                this.kept,
-                false, // hydrating
-                true // removeOnly (!important, avoids unnecessary moves)
-            );
-            this._vnode = this.kept;
-        },
-
-        updated: function updated() {
-            var children = this.prevChildren;
-            var moveClass = this.moveClass || ((this.name || 'v') + '-move');
-            if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
-                return
-            }
-
-            // we divide the work into three loops to avoid mixing DOM reads and writes
-            // in each iteration - which helps prevent layout thrashing.
-            children.forEach(callPendingCbs);
-            children.forEach(recordPosition);
-            children.forEach(applyTranslation);
-
-            // force reflow to put everything in position
-            // assign to this to avoid being removed in tree-shaking
-            // $flow-disable-line
-            this._reflow = document.body.offsetHeight;
-
-            children.forEach(function (c) {
-                if (c.data.moved) {
-                    var el = c.elm;
-                    var s = el.style;
-                    addTransitionClass(el, moveClass);
-                    s.transform = s.WebkitTransform = s.transitionDuration = '';
-                    el.addEventListener(transitionEndEvent, el._moveCb = function cb(e) {
-                        if (!e || /transform$/.test(e.propertyName)) {
-                            el.removeEventListener(transitionEndEvent, cb);
-                            el._moveCb = null;
-                            removeTransitionClass(el, moveClass);
-                        }
-                    });
-                }
-            });
-        },
-
-        methods: {
-            hasMove: function hasMove(el, moveClass) {
-                /* istanbul ignore if */
-                if (!hasTransition) {
-                    return false
-                }
-                /* istanbul ignore if */
-                if (this._hasMove) {
-                    return this._hasMove
-                }
-                // Detect whether an element with the move class applied has
-                // CSS transitions. Since the element may be inside an entering
-                // transition at this very moment, we make a clone of it and remove
-                // all other transition classes applied to ensure only the move class
-                // is applied.
-                var clone = el.cloneNode();
-                if (el._transitionClasses) {
-                    el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
-                }
-                addClass(clone, moveClass);
-                clone.style.display = 'none';
-                this.$el.appendChild(clone);
-                var info = getTransitionInfo(clone);
-                this.$el.removeChild(clone);
-                return (this._hasMove = info.hasTransform)
-            }
-        }
-    };
-
-    function callPendingCbs(c) {
-        /* istanbul ignore if */
-        if (c.elm._moveCb) {
-            c.elm._moveCb();
-        }
-        /* istanbul ignore if */
-        if (c.elm._enterCb) {
-            c.elm._enterCb();
-        }
-    }
-
-    function recordPosition(c) {
-        c.data.newPos = c.elm.getBoundingClientRect();
-    }
-
-    function applyTranslation(c) {
-        var oldPos = c.data.pos;
-        var newPos = c.data.newPos;
-        var dx = oldPos.left - newPos.left;
-        var dy = oldPos.top - newPos.top;
-        if (dx || dy) {
-            c.data.moved = true;
-            var s = c.elm.style;
-            s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
-            s.transitionDuration = '0s';
-        }
-    }
-
-    var platformComponents = {
-        Transition: Transition,
-        TransitionGroup: TransitionGroup
-    };
-
-    /*  */
-
-    // install platform specific utils
-    Vue$3.config.mustUseProp = mustUseProp;
-    Vue$3.config.isReservedTag = isReservedTag;
-    Vue$3.config.isReservedAttr = isReservedAttr;
-    Vue$3.config.getTagNamespace = getTagNamespace;
-    Vue$3.config.isUnknownElement = isUnknownElement;
-
-    // install platform runtime directives & components
-    extend(Vue$3.options.directives, platformDirectives);
-    extend(Vue$3.options.components, platformComponents);
-
-    // install platform patch function
-    Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
-
-    // public mount method
-    Vue$3.prototype.$mount = function (
-        el,
-        hydrating
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
     ) {
-        el = el && inBrowser ? query(el) : undefined;
-        return mountComponent(this, el, hydrating)
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if ("development" !== 'production' && type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
     };
+  });
+}
 
-    // devtools global hook
+/*  */
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var cachedNode = cache[key];
+    if (cachedNode) {
+      var name = getComponentName(cachedNode.componentOptions);
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var cached$$1 = cache[key];
+  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+    cached$$1.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    var this$1 = this;
+
+    for (var key in this$1.cache) {
+      pruneCacheEntry(this$1.cache, key, this$1.keys);
+    }
+  },
+
+  watch: {
+    include: function include (val) {
+      pruneCache(this, function (name) { return matches(val, name); });
+    },
+    exclude: function exclude (val) {
+      pruneCache(this, function (name) { return !matches(val, name); });
+    }
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        cache[key] = vnode;
+        keys.push(key);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue$3);
+
+Object.defineProperty(Vue$3.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue$3.prototype, '$ssrContext', {
+  get: function get () {
     /* istanbul ignore next */
-    Vue$3.nextTick(function () {
-        if (config.devtools) {
-            if (devtools) {
-                devtools.emit('init', Vue$3);
-            } else if ("development" !== 'production' && isChrome) {
-                console[console.info ? 'info' : 'log'](
-                    'Download the Vue Devtools extension for a better development experience:\n' +
-                    'https://github.com/vuejs/vue-devtools'
-                );
-            }
-        }
-        if ("development" !== 'production' &&
-            config.productionTip !== false &&
-            inBrowser && typeof console !== 'undefined'
-        ) {
-            console[console.info ? 'info' : 'log'](
-                "You are running Vue in development mode.\n" +
-                "Make sure to turn on production mode when deploying for production.\n" +
-                "See more tips at https://vuejs.org/guide/deployment.html"
-            );
-        }
-    }, 0);
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
 
-    /*  */
+Vue$3.version = '2.5.13';
 
-    // check whether current browser encodes a char inside attribute values
-    function shouldDecode(content, encoded) {
-        var div = document.createElement('div');
-        div.innerHTML = "<div a=\"" + content + "\"/>";
-        return div.innerHTML.indexOf(encoded) > 0
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isPreTag = function (tag) { return tag === 'pre'; };
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      "development" !== 'production' && warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setAttribute (node, key, val) {
+  node.setAttribute(key, val);
+}
+
+
+var nodeOps = Object.freeze({
+	createElement: createElement$1,
+	createElementNS: createElementNS,
+	createTextNode: createTextNode,
+	createComment: createComment,
+	insertBefore: insertBefore,
+	removeChild: removeChild,
+	appendChild: appendChild,
+	parentNode: parentNode,
+	nextSibling: nextSibling,
+	tagName: tagName,
+	setTextContent: setTextContent,
+	setAttribute: setAttribute
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!key) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        a.asyncFactory === b.asyncFactory &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove () {
+      if (--remove.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove.listeners = listeners;
+    return remove
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
     }
 
-    // #3663
-    // IE encodes newlines inside attribute values while other browsers don't
-    var shouldDecodeNewlines = inBrowser ? shouldDecode('\n', '&#10;') : false;
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
 
-    /*  */
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
 
-    var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
-    var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+      if ("development" !== 'production' && data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
 
-    var buildRegex = cached(function (delimiters) {
-        var open = delimiters[0].replace(regexEscapeRE, '\\$&');
-        var close = delimiters[1].replace(regexEscapeRE, '\\$&');
-        return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-    });
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */, parentElm, refElm);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
 
-    function parseText(
-        text,
-        delimiters
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (ref$$1.parentNode === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setAttribute(vnode.elm, i, '');
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setAttribute(vnode.elm, i, '');
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
     ) {
-        var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-        if (!tagRE.test(text)) {
-            return
+      nodeOps.setAttribute(vnode.elm, i, '');
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
         }
-        var tokens = [];
-        var lastIndex = tagRE.lastIndex = 0;
-        var match, index;
-        while ((match = tagRE.exec(text))) {
-            index = match.index;
-            // push text token
-            if (index > lastIndex) {
-                tokens.push(JSON.stringify(text.slice(lastIndex, index)));
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if ("development" !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
             }
-            // tag token
-            var exp = parseFilters(match[1].trim());
-            tokens.push(("_s(" + exp + ")"));
-            lastIndex = index + match[0].length;
-        }
-        if (lastIndex < text.length) {
-            tokens.push(JSON.stringify(text.slice(lastIndex)));
-        }
-        return tokens.join('+')
-    }
-
-    /*  */
-
-    function transformNode(el, options) {
-        var warn = options.warn || baseWarn;
-        var staticClass = getAndRemoveAttr(el, 'class');
-        if ("development" !== 'production' && staticClass) {
-            var expression = parseText(staticClass, options.delimiters);
-            if (expression) {
-                warn(
-                    "class=\"" + staticClass + "\": " +
-                    'Interpolation inside attributes has been removed. ' +
-                    'Use v-bind or the colon shorthand instead. For example, ' +
-                    'instead of <div class="{{ val }}">, use <div :class="val">.'
-                );
-            }
-        }
-        if (staticClass) {
-            el.staticClass = JSON.stringify(staticClass);
-        }
-        var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-        if (classBinding) {
-            el.classBinding = classBinding;
-        }
-    }
-
-    function genData(el) {
-        var data = '';
-        if (el.staticClass) {
-            data += "staticClass:" + (el.staticClass) + ",";
-        }
-        if (el.classBinding) {
-            data += "class:" + (el.classBinding) + ",";
-        }
-        return data
-    }
-
-    var klass$1 = {
-        staticKeys: ['staticClass'],
-        transformNode: transformNode,
-        genData: genData
-    };
-
-    /*  */
-
-    function transformNode$1(el, options) {
-        var warn = options.warn || baseWarn;
-        var staticStyle = getAndRemoveAttr(el, 'style');
-        if (staticStyle) {
-            /* istanbul ignore if */
-            {
-                var expression = parseText(staticStyle, options.delimiters);
-                if (expression) {
-                    warn(
-                        "style=\"" + staticStyle + "\": " +
-                        'Interpolation inside attributes has been removed. ' +
-                        'Use v-bind or the colon shorthand instead. For example, ' +
-                        'instead of <div style="{{ val }}">, use <div :style="val">.'
-                    );
-                }
-            }
-            el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
-        }
-
-        var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-        if (styleBinding) {
-            el.styleBinding = styleBinding;
-        }
-    }
-
-    function genData$1(el) {
-        var data = '';
-        if (el.staticStyle) {
-            data += "staticStyle:" + (el.staticStyle) + ",";
-        }
-        if (el.styleBinding) {
-            data += "style:(" + (el.styleBinding) + "),";
-        }
-        return data
-    }
-
-    var style$1 = {
-        staticKeys: ['staticStyle'],
-        transformNode: transformNode$1,
-        genData: genData$1
-    };
-
-    /*  */
-
-    var decoder;
-
-    var he = {
-        decode: function decode(html) {
-            decoder = decoder || document.createElement('div');
-            decoder.innerHTML = html;
-            return decoder.textContent
-        }
-    };
-
-    /*  */
-
-    var isUnaryTag = makeMap(
-        'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
-        'link,meta,param,source,track,wbr'
-    );
-
-    // Elements that you can, intentionally, leave open
-    // (and which close themselves)
-    var canBeLeftOpenTag = makeMap(
-        'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
-    );
-
-    // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
-    // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
-    var isNonPhrasingTag = makeMap(
-        'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
-        'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
-        'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
-        'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
-        'title,tr,track'
-    );
-
-    /**
-     * Not type-checking this file because it's mostly vendor code.
-     */
-
-    /*!
-     * HTML Parser By John Resig (ejohn.org)
-     * Modified by Juriy "kangax" Zaytsev
-     * Original code by Erik Arvidsson, Mozilla Public License
-     * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
-     */
-
-    // Regular Expressions for parsing tags and attributes
-    var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-    // could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-    // but for Vue templates we can enforce a simple charset
-    var ncname = '[a-zA-Z_][\\w\\-\\.]*';
-    var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
-    var startTagOpen = new RegExp(("^<" + qnameCapture));
-    var startTagClose = /^\s*(\/?)>/;
-    var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
-    var doctype = /^<!DOCTYPE [^>]+>/i;
-    var comment = /^<!--/;
-    var conditionalComment = /^<!\[/;
-
-    var IS_REGEX_CAPTURING_BROKEN = false;
-    'x'.replace(/x(.)?/g, function (m, g) {
-        IS_REGEX_CAPTURING_BROKEN = g === '';
-    });
-
-    // Special Elements (can contain anything)
-    var isPlainTextElement = makeMap('script,style,textarea', true);
-    var reCache = {};
-
-    var decodingMap = {
-        '&lt;': '<',
-        '&gt;': '>',
-        '&quot;': '"',
-        '&amp;': '&',
-        '&#10;': '\n'
-    };
-    var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-    var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10);/g;
-
-    // #5992
-    var isIgnoreNewlineTag = makeMap('pre,textarea', true);
-    var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
-
-    function decodeAttr(value, shouldDecodeNewlines) {
-        var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-        return value.replace(re, function (match) { return decodingMap[match]; })
-    }
-
-    function parseHTML(html, options) {
-        var stack = [];
-        var expectHTML = options.expectHTML;
-        var isUnaryTag$$1 = options.isUnaryTag || no;
-        var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-        var index = 0;
-        var last, lastTag;
-        while (html) {
-            last = html;
-            // Make sure we're not in a plaintext content element like script/style
-            if (!lastTag || !isPlainTextElement(lastTag)) {
-                var textEnd = html.indexOf('<');
-                if (textEnd === 0) {
-                    // Comment:
-                    if (comment.test(html)) {
-                        var commentEnd = html.indexOf('-->');
-
-                        if (commentEnd >= 0) {
-                            if (options.shouldKeepComment) {
-                                options.comment(html.substring(4, commentEnd));
-                            }
-                            advance(commentEnd + 3);
-                            continue
-                        }
-                    }
-
-                    // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
-                    if (conditionalComment.test(html)) {
-                        var conditionalEnd = html.indexOf(']>');
-
-                        if (conditionalEnd >= 0) {
-                            advance(conditionalEnd + 2);
-                            continue
-                        }
-                    }
-
-                    // Doctype:
-                    var doctypeMatch = html.match(doctype);
-                    if (doctypeMatch) {
-                        advance(doctypeMatch[0].length);
-                        continue
-                    }
-
-                    // End tag:
-                    var endTagMatch = html.match(endTag);
-                    if (endTagMatch) {
-                        var curIndex = index;
-                        advance(endTagMatch[0].length);
-                        parseEndTag(endTagMatch[1], curIndex, index);
-                        continue
-                    }
-
-                    // Start tag:
-                    var startTagMatch = parseStartTag();
-                    if (startTagMatch) {
-                        handleStartTag(startTagMatch);
-                        if (shouldIgnoreFirstNewline(lastTag, html)) {
-                            advance(1);
-                        }
-                        continue
-                    }
-                }
-
-                var text = (void 0), rest = (void 0), next = (void 0);
-                if (textEnd >= 0) {
-                    rest = html.slice(textEnd);
-                    while (
-                        !endTag.test(rest) &&
-                        !startTagOpen.test(rest) &&
-                        !comment.test(rest) &&
-                        !conditionalComment.test(rest)
-                    ) {
-                        // < in plain text, be forgiving and treat it as text
-                        next = rest.indexOf('<', 1);
-                        if (next < 0) { break }
-                        textEnd += next;
-                        rest = html.slice(textEnd);
-                    }
-                    text = html.substring(0, textEnd);
-                    advance(textEnd);
-                }
-
-                if (textEnd < 0) {
-                    text = html;
-                    html = '';
-                }
-
-                if (options.chars && text) {
-                    options.chars(text);
-                }
-            } else {
-                var endTagLength = 0;
-                var stackedTag = lastTag.toLowerCase();
-                var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-                var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
-                    endTagLength = endTag.length;
-                    if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
-                        text = text
-                            .replace(/<!--([\s\S]*?)-->/g, '$1')
-                            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
-                    }
-                    if (shouldIgnoreFirstNewline(stackedTag, text)) {
-                        text = text.slice(1);
-                    }
-                    if (options.chars) {
-                        options.chars(text);
-                    }
-                    return ''
-                });
-                index += html.length - rest$1.length;
-                html = rest$1;
-                parseEndTag(stackedTag, index - endTagLength, index);
-            }
-
-            if (html === last) {
-                options.chars && options.chars(html);
-                if ("development" !== 'production' && !stack.length && options.warn) {
-                    options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
-                }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
                 break
+              }
+              childNode = childNode.nextSibling;
             }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if ("development" !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
         }
-
-        // Clean up any remaining tags
-        parseEndTag();
-
-        function advance(n) {
-            index += n;
-            html = html.substring(n);
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
         }
-
-        function parseStartTag() {
-            var start = html.match(startTagOpen);
-            if (start) {
-                var match = {
-                    tagName: start[1],
-                    attrs: [],
-                    start: index
-                };
-                advance(start[0].length);
-                var end, attr;
-                while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
-                    advance(attr[0].length);
-                    match.attrs.push(attr);
-                }
-                if (end) {
-                    match.unarySlash = end[1];
-                    advance(end[0].length);
-                    match.end = index;
-                    return match
-                }
-            }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
         }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
 
-        function handleStartTag(match) {
-            var tagName = match.tagName;
-            var unarySlash = match.unarySlash;
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
 
-            if (expectHTML) {
-                if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-                    parseEndTag(lastTag);
-                }
-                if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-                    parseEndTag(tagName);
-                }
-            }
+  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
 
-            var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
 
-            var l = match.attrs.length;
-            var attrs = new Array(l);
-            for (var i = 0; i < l; i++) {
-                var args = match.attrs[i];
-                // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-                if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-                    if (args[3] === '') { delete args[3]; }
-                    if (args[4] === '') { delete args[4]; }
-                    if (args[5] === '') { delete args[5]; }
-                }
-                var value = args[3] || args[4] || args[5] || '';
-                attrs[i] = {
-                    name: args[1],
-                    value: decodeAttr(
-                        value,
-                        options.shouldDecodeNewlines
-                    )
-                };
-            }
-
-            if (!unary) {
-                stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
-                lastTag = tagName;
-            }
-
-            if (options.start) {
-                options.start(tagName, attrs, unary, match.start, match.end);
-            }
-        }
-
-        function parseEndTag(tagName, start, end) {
-            var pos, lowerCasedTagName;
-            if (start == null) { start = index; }
-            if (end == null) { end = index; }
-
-            if (tagName) {
-                lowerCasedTagName = tagName.toLowerCase();
-            }
-
-            // Find the closest opened tag of the same type
-            if (tagName) {
-                for (pos = stack.length - 1; pos >= 0; pos--) {
-                    if (stack[pos].lowerCasedTag === lowerCasedTagName) {
-                        break
-                    }
-                }
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
             } else {
-                // If no tag name is provided, clean shop
-                pos = 0;
-            }
-
-            if (pos >= 0) {
-                // Close all the open elements, up the stack
-                for (var i = stack.length - 1; i >= pos; i--) {
-                    if ("development" !== 'production' &&
-                        (i > pos || !tagName) &&
-                        options.warn
-                    ) {
-                        options.warn(
-                            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
-                        );
-                    }
-                    if (options.end) {
-                        options.end(stack[i].tag, start, end);
-                    }
-                }
-
-                // Remove the open elements from the stack
-                stack.length = pos;
-                lastTag = pos && stack[pos - 1].tag;
-            } else if (lowerCasedTagName === 'br') {
-                if (options.start) {
-                    options.start(tagName, [], true, start, end);
-                }
-            } else if (lowerCasedTagName === 'p') {
-                if (options.start) {
-                    options.start(tagName, [], false, start, end);
-                }
-                if (options.end) {
-                    options.end(tagName, start, end);
-                }
-            }
-        }
-    }
-
-    /*  */
-
-    var onRE = /^@|^v-on:/;
-    var dirRE = /^v-|^@|^:/;
-    var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-    var forIteratorRE = /\((\{[^}]*\}|[^,]*),([^,]*)(?:,([^,]*))?\)/;
-
-    var argRE = /:(.*)$/;
-    var bindRE = /^:|^v-bind:/;
-    var modifierRE = /\.[^.]+/g;
-
-    var decodeHTMLCached = cached(he.decode);
-
-    // configurable state
-    var warn$2;
-    var delimiters;
-    var transforms;
-    var preTransforms;
-    var postTransforms;
-    var platformIsPreTag;
-    var platformMustUseProp;
-    var platformGetTagNamespace;
-
-
-
-    function createASTElement(
-        tag,
-        attrs,
-        parent
-    ) {
-        return {
-            type: 1,
-            tag: tag,
-            attrsList: attrs,
-            attrsMap: makeAttrsMap(attrs),
-            parent: parent,
-            children: []
-        }
-    }
-
-    /**
-     * Convert HTML string to AST.
-     */
-    function parse(
-        template,
-        options
-    ) {
-        warn$2 = options.warn || baseWarn;
-
-        platformIsPreTag = options.isPreTag || no;
-        platformMustUseProp = options.mustUseProp || no;
-        platformGetTagNamespace = options.getTagNamespace || no;
-
-        transforms = pluckModuleFunction(options.modules, 'transformNode');
-        preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-        postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-        delimiters = options.delimiters;
-
-        var stack = [];
-        var preserveWhitespace = options.preserveWhitespace !== false;
-        var root;
-        var currentParent;
-        var inVPre = false;
-        var inPre = false;
-        var warned = false;
-
-        function warnOnce(msg) {
-            if (!warned) {
-                warned = true;
-                warn$2(msg);
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
             }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
         }
 
-        function endPre(element) {
-            // check pre state
-            if (element.pre) {
-                inVPre = false;
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm$1 = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm$1,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
             }
-            if (platformIsPreTag(element.tag)) {
-                inPre = false;
-            }
-        }
-
-        parseHTML(template, {
-            warn: warn$2,
-            expectHTML: options.expectHTML,
-            isUnaryTag: options.isUnaryTag,
-            canBeLeftOpenTag: options.canBeLeftOpenTag,
-            shouldDecodeNewlines: options.shouldDecodeNewlines,
-            shouldKeepComment: options.comments,
-            start: function start(tag, attrs, unary) {
-                // check namespace.
-                // inherit parent ns if there is one
-                var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
-
-                // handle IE svg bug
-                /* istanbul ignore if */
-                if (isIE && ns === 'svg') {
-                    attrs = guardIESVGBug(attrs);
-                }
-
-                var element = createASTElement(tag, attrs, currentParent);
-                if (ns) {
-                    element.ns = ns;
-                }
-
-                if (isForbiddenTag(element) && !isServerRendering()) {
-                    element.forbidden = true;
-                    "development" !== 'production' && warn$2(
-                        'Templates should only be responsible for mapping the state to the ' +
-                        'UI. Avoid placing tags with side-effects in your templates, such as ' +
-                        "<" + tag + ">" + ', as they will not be parsed.'
-                    );
-                }
-
-                // apply pre-transforms
-                for (var i = 0; i < preTransforms.length; i++) {
-                    element = preTransforms[i](element, options) || element;
-                }
-
-                if (!inVPre) {
-                    processPre(element);
-                    if (element.pre) {
-                        inVPre = true;
-                    }
-                }
-                if (platformIsPreTag(element.tag)) {
-                    inPre = true;
-                }
-                if (inVPre) {
-                    processRawAttrs(element);
-                } else if (!element.processed) {
-                    // structural directives
-                    processFor(element);
-                    processIf(element);
-                    processOnce(element);
-                    // element-scope stuff
-                    processElement(element, options);
-                }
-
-                function checkRootConstraints(el) {
-                    {
-                        if (el.tag === 'slot' || el.tag === 'template') {
-                            warnOnce(
-                                "Cannot use <" + (el.tag) + "> as component root element because it may " +
-                                'contain multiple nodes.'
-                            );
-                        }
-                        if (el.attrsMap.hasOwnProperty('v-for')) {
-                            warnOnce(
-                                'Cannot use v-for on stateful component root element because ' +
-                                'it renders multiple elements.'
-                            );
-                        }
-                    }
-                }
-
-                // tree management
-                if (!root) {
-                    root = element;
-                    checkRootConstraints(root);
-                } else if (!stack.length) {
-                    // allow root elements with v-if, v-else-if and v-else
-                    if (root.if && (element.elseif || element.else)) {
-                        checkRootConstraints(element);
-                        addIfCondition(root, {
-                            exp: element.elseif,
-                            block: element
-                        });
-                    } else {
-                        warnOnce(
-                            "Component template should contain exactly one root element. " +
-                            "If you are using v-if on multiple elements, " +
-                            "use v-else-if to chain them instead."
-                        );
-                    }
-                }
-                if (currentParent && !element.forbidden) {
-                    if (element.elseif || element.else) {
-                        processIfConditions(element, currentParent);
-                    } else if (element.slotScope) { // scoped slot
-                        currentParent.plain = false;
-                        var name = element.slotTarget || '"default"'; (currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-                    } else {
-                        currentParent.children.push(element);
-                        element.parent = currentParent;
-                    }
-                }
-                if (!unary) {
-                    currentParent = element;
-                    stack.push(element);
-                } else {
-                    endPre(element);
-                }
-                // apply post-transforms
-                for (var i$1 = 0; i$1 < postTransforms.length; i$1++) {
-                    postTransforms[i$1](element, options);
-                }
-            },
-
-            end: function end() {
-                // remove trailing whitespace
-                var element = stack[stack.length - 1];
-                var lastNode = element.children[element.children.length - 1];
-                if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-                    element.children.pop();
-                }
-                // pop stack
-                stack.length -= 1;
-                currentParent = stack[stack.length - 1];
-                endPre(element);
-            },
-
-            chars: function chars(text) {
-                if (!currentParent) {
-                    {
-                        if (text === template) {
-                            warnOnce(
-                                'Component template requires a root element, rather than just text.'
-                            );
-                        } else if ((text = text.trim())) {
-                            warnOnce(
-                                ("text \"" + text + "\" outside root element will be ignored.")
-                            );
-                        }
-                    }
-                    return
-                }
-                // IE textarea placeholder bug
-                /* istanbul ignore if */
-                if (isIE &&
-                    currentParent.tag === 'textarea' &&
-                    currentParent.attrsMap.placeholder === text
-                ) {
-                    return
-                }
-                var children = currentParent.children;
-                text = inPre || text.trim()
-                    ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-                    // only preserve whitespace if its not right after a starting tag
-                    : preserveWhitespace && children.length ? ' ' : '';
-                if (text) {
-                    var expression;
-                    if (!inVPre && text !== ' ' && (expression = parseText(text, delimiters))) {
-                        children.push({
-                            type: 2,
-                            expression: expression,
-                            text: text
-                        });
-                    } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-                        children.push({
-                            type: 3,
-                            text: text
-                        });
-                    }
-                }
-            },
-            comment: function comment(text) {
-                currentParent.children.push({
-                    type: 3,
-                    text: text,
-                    isComment: true
-                });
-            }
-        });
-        return root
-    }
-
-    function processPre(el) {
-        if (getAndRemoveAttr(el, 'v-pre') != null) {
-            el.pre = true;
-        }
-    }
-
-    function processRawAttrs(el) {
-        var l = el.attrsList.length;
-        if (l) {
-            var attrs = el.attrs = new Array(l);
-            for (var i = 0; i < l; i++) {
-                attrs[i] = {
-                    name: el.attrsList[i].name,
-                    value: JSON.stringify(el.attrsList[i].value)
-                };
-            }
-        } else if (!el.pre) {
-            // non root node in pre blocks with no attributes
-            el.plain = true;
-        }
-    }
-
-    function processElement(element, options) {
-        processKey(element);
-
-        // determine whether this is a plain element after
-        // removing structural attributes
-        element.plain = !element.key && !element.attrsList.length;
-
-        processRef(element);
-        processSlot(element);
-        processComponent(element);
-        for (var i = 0; i < transforms.length; i++) {
-            element = transforms[i](element, options) || element;
-        }
-        processAttrs(element);
-    }
-
-    function processKey(el) {
-        var exp = getBindingAttr(el, 'key');
-        if (exp) {
-            if ("development" !== 'production' && el.tag === 'template') {
-                warn$2("<template> cannot be keyed. Place the key on real elements instead.");
-            }
-            el.key = exp;
-        }
-    }
-
-    function processRef(el) {
-        var ref = getBindingAttr(el, 'ref');
-        if (ref) {
-            el.ref = ref;
-            el.refInFor = checkInFor(el);
-        }
-    }
-
-    function processFor(el) {
-        var exp;
-        if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-            var inMatch = exp.match(forAliasRE);
-            if (!inMatch) {
-                "development" !== 'production' && warn$2(
-                    ("Invalid v-for expression: " + exp)
-                );
-                return
-            }
-            el.for = inMatch[2].trim();
-            var alias = inMatch[1].trim();
-            var iteratorMatch = alias.match(forIteratorRE);
-            if (iteratorMatch) {
-                el.alias = iteratorMatch[1].trim();
-                el.iterator1 = iteratorMatch[2].trim();
-                if (iteratorMatch[3]) {
-                    el.iterator2 = iteratorMatch[3].trim();
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
                 }
+              }
             } else {
-                el.alias = alias;
+              registerRef(ancestor);
             }
+            ancestor = ancestor.parent;
+          }
         }
-    }
 
-    function processIf(el) {
-        var exp = getAndRemoveAttr(el, 'v-if');
-        if (exp) {
-            el.if = exp;
-            addIfCondition(el, {
-                exp: exp,
-                block: el
-            });
-        } else {
-            if (getAndRemoveAttr(el, 'v-else') != null) {
-                el.else = true;
-            }
-            var elseif = getAndRemoveAttr(el, 'v-else-if');
-            if (elseif) {
-                el.elseif = elseif;
-            }
+        // destroy old node
+        if (isDef(parentElm$1)) {
+          removeVnodes(parentElm$1, [oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
         }
+      }
     }
 
-    function processIfConditions(el, parent) {
-        var prev = findPrevElement(parent.children);
-        if (prev && prev.if) {
-            addIfCondition(prev, {
-                exp: el.elseif,
-                block: el
-            });
-        } else {
-            warn$2(
-                "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-                "used on element <" + (el.tag) + "> without corresponding v-if."
-            );
-        }
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
     }
+  }
 
-    function findPrevElement(children) {
-        var i = children.length;
-        while (i--) {
-            if (children[i].type === 1) {
-                return children[i]
-            } else {
-                if ("development" !== 'production' && children[i].text !== ' ') {
-                    warn$2(
-                        "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-                        "will be ignored."
-                    );
-                }
-                children.pop();
-            }
-        }
-    }
-
-    function addIfCondition(el, condition) {
-        if (!el.ifConditions) {
-            el.ifConditions = [];
-        }
-        el.ifConditions.push(condition);
-    }
-
-    function processOnce(el) {
-        var once$$1 = getAndRemoveAttr(el, 'v-once');
-        if (once$$1 != null) {
-            el.once = true;
-        }
-    }
-
-    function processSlot(el) {
-        if (el.tag === 'slot') {
-            el.slotName = getBindingAttr(el, 'name');
-            if ("development" !== 'production' && el.key) {
-                warn$2(
-                    "`key` does not work on <slot> because slots are abstract outlets " +
-                    "and can possibly expand into multiple elements. " +
-                    "Use the key on a wrapping element instead."
-                );
-            }
-        } else {
-            var slotScope;
-            if (el.tag === 'template') {
-                slotScope = getAndRemoveAttr(el, 'scope');
-                /* istanbul ignore if */
-                if ("development" !== 'production' && slotScope) {
-                    warn$2(
-                        "the \"scope\" attribute for scoped slots have been deprecated and " +
-                        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-                        "can also be used on plain elements in addition to <template> to " +
-                        "denote scoped slots.",
-                        true
-                    );
-                }
-                el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-            } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-                el.slotScope = slotScope;
-            }
-            var slotTarget = getBindingAttr(el, 'slot');
-            if (slotTarget) {
-                el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-                // preserve slot as an attribute for native shadow DOM compat
-                // only for non-scoped slots.
-                if (!el.slotScope) {
-                    addAttr(el, 'slot', slotTarget);
-                }
-            }
-        }
-    }
-
-    function processComponent(el) {
-        var binding;
-        if ((binding = getBindingAttr(el, 'is'))) {
-            el.component = binding;
-        }
-        if (getAndRemoveAttr(el, 'inline-template') != null) {
-            el.inlineTemplate = true;
-        }
-    }
-
-    function processAttrs(el) {
-        var list = el.attrsList;
-        var i, l, name, rawName, value, modifiers, isProp;
-        for (i = 0, l = list.length; i < l; i++) {
-            name = rawName = list[i].name;
-            value = list[i].value;
-            if (dirRE.test(name)) {
-                // mark element as dynamic
-                el.hasBindings = true;
-                // modifiers
-                modifiers = parseModifiers(name);
-                if (modifiers) {
-                    name = name.replace(modifierRE, '');
-                }
-                if (bindRE.test(name)) { // v-bind
-                    name = name.replace(bindRE, '');
-                    value = parseFilters(value);
-                    isProp = false;
-                    if (modifiers) {
-                        if (modifiers.prop) {
-                            isProp = true;
-                            name = camelize(name);
-                            if (name === 'innerHtml') { name = 'innerHTML'; }
-                        }
-                        if (modifiers.camel) {
-                            name = camelize(name);
-                        }
-                        if (modifiers.sync) {
-                            addHandler(
-                                el,
-                                ("update:" + (camelize(name))),
-                                genAssignmentCode(value, "$event")
-                            );
-                        }
-                    }
-                    if (isProp || (
-                        !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
-                    )) {
-                        addProp(el, name, value);
-                    } else {
-                        addAttr(el, name, value);
-                    }
-                } else if (onRE.test(name)) { // v-on
-                    name = name.replace(onRE, '');
-                    addHandler(el, name, value, modifiers, false, warn$2);
-                } else { // normal directives
-                    name = name.replace(dirRE, '');
-                    // parse arg
-                    var argMatch = name.match(argRE);
-                    var arg = argMatch && argMatch[1];
-                    if (arg) {
-                        name = name.slice(0, -(arg.length + 1));
-                    }
-                    addDirective(el, name, rawName, value, arg, modifiers);
-                    if ("development" !== 'production' && name === 'model') {
-                        checkForAliasModel(el, value);
-                    }
-                }
-            } else {
-                // literal attribute
-                {
-                    var expression = parseText(value, delimiters);
-                    if (expression) {
-                        warn$2(
-                            name + "=\"" + value + "\": " +
-                            'Interpolation inside attributes has been removed. ' +
-                            'Use v-bind or the colon shorthand instead. For example, ' +
-                            'instead of <div id="{{ val }}">, use <div :id="val">.'
-                        );
-                    }
-                }
-                addAttr(el, name, JSON.stringify(value));
-            }
-        }
-    }
-
-    function checkInFor(el) {
-        var parent = el;
-        while (parent) {
-            if (parent.for !== undefined) {
-                return true
-            }
-            parent = parent.parent;
-        }
-        return false
-    }
-
-    function parseModifiers(name) {
-        var match = name.match(modifierRE);
-        if (match) {
-            var ret = {};
-            match.forEach(function (m) { ret[m.slice(1)] = true; });
-            return ret
-        }
-    }
-
-    function makeAttrsMap(attrs) {
-        var map = {};
-        for (var i = 0, l = attrs.length; i < l; i++) {
-            if (
-                "development" !== 'production' &&
-                map[attrs[i].name] && !isIE && !isEdge
-            ) {
-                warn$2('duplicate attribute: ' + attrs[i].name);
-            }
-            map[attrs[i].name] = attrs[i].value;
-        }
-        return map
-    }
-
-    // for script (e.g. type="x/template") or style, do not decode content
-    function isTextTag(el) {
-        return el.tag === 'script' || el.tag === 'style'
-    }
-
-    function isForbiddenTag(el) {
-        return (
-            el.tag === 'style' ||
-            (el.tag === 'script' && (
-                !el.attrsMap.type ||
-                el.attrsMap.type === 'text/javascript'
-            ))
-        )
-    }
-
-    var ieNSBug = /^xmlns:NS\d+/;
-    var ieNSPrefix = /^NS\d+:/;
-
-    /* istanbul ignore next */
-    function guardIESVGBug(attrs) {
-        var res = [];
-        for (var i = 0; i < attrs.length; i++) {
-            var attr = attrs[i];
-            if (!ieNSBug.test(attr.name)) {
-                attr.name = attr.name.replace(ieNSPrefix, '');
-                res.push(attr);
-            }
-        }
-        return res
-    }
-
-    function checkForAliasModel(el, value) {
-        var _el = el;
-        while (_el) {
-            if (_el.for && _el.alias === value) {
-                warn$2(
-                    "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-                    "You are binding v-model directly to a v-for iteration alias. " +
-                    "This will not be able to modify the v-for source array because " +
-                    "writing to the alias is like modifying a function local variable. " +
-                    "Consider using an array of objects and use v-model on an object property instead."
-                );
-            }
-            _el = _el.parent;
-        }
-    }
-
-    /*  */
-
-    /**
-     * Expand input[v-model] with dyanmic type bindings into v-if-else chains
-     * Turn this:
-     *   <input v-model="data[type]" :type="type">
-     * into this:
-     *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
-     *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
-     *   <input v-else :type="type" v-model="data[type]">
-     */
-
-    function preTransformNode(el, options) {
-        if (el.tag === 'input') {
-            var map = el.attrsMap;
-            if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-                var typeBinding = getBindingAttr(el, 'type');
-                var ifCondition = getAndRemoveAttr(el, 'v-if', true);
-                var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
-                // 1. checkbox
-                var branch0 = cloneASTElement(el);
-                // process for on the main node
-                processFor(branch0);
-                addRawAttr(branch0, 'type', 'checkbox');
-                processElement(branch0, options);
-                branch0.processed = true; // prevent it from double-processed
-                branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
-                addIfCondition(branch0, {
-                    exp: branch0.if,
-                    block: branch0
-                });
-                // 2. add radio else-if condition
-                var branch1 = cloneASTElement(el);
-                getAndRemoveAttr(branch1, 'v-for', true);
-                addRawAttr(branch1, 'type', 'radio');
-                processElement(branch1, options);
-                addIfCondition(branch0, {
-                    exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
-                    block: branch1
-                });
-                // 3. other
-                var branch2 = cloneASTElement(el);
-                getAndRemoveAttr(branch2, 'v-for', true);
-                addRawAttr(branch2, ':type', typeBinding);
-                processElement(branch2, options);
-                addIfCondition(branch0, {
-                    exp: ifCondition,
-                    block: branch2
-                });
-                return branch0
-            }
-        }
-    }
-
-    function cloneASTElement(el) {
-        return createASTElement(el.tag, el.attrsList.slice(), el.parent)
-    }
-
-    function addRawAttr(el, name, value) {
-        el.attrsMap[name] = value;
-        el.attrsList.push({ name: name, value: value });
-    }
-
-    var model$2 = {
-        preTransformNode: preTransformNode
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
     };
-
-    var modules$1 = [
-        klass$1,
-        style$1,
-        model$2
-    ];
-
-    /*  */
-
-    function text(el, dir) {
-        if (dir.value) {
-            addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
-        }
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
     }
+  }
 
-    /*  */
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
 
-    function html(el, dir) {
-        if (dir.value) {
-            addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
-        }
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
     }
+  }
+}
 
-    var directives$1 = {
-        model: model,
-        text: text,
-        html: html
-    };
+var emptyModifiers = Object.create(null);
 
-    /*  */
-
-    var baseOptions = {
-        expectHTML: true,
-        modules: modules$1,
-        directives: directives$1,
-        isPreTag: isPreTag,
-        isUnaryTag: isUnaryTag,
-        mustUseProp: mustUseProp,
-        canBeLeftOpenTag: canBeLeftOpenTag,
-        isReservedTag: isReservedTag,
-        getTagNamespace: getTagNamespace,
-        staticKeys: genStaticKeys(modules$1)
-    };
-
-    /*  */
-
-    var isStaticKey;
-    var isPlatformReservedTag;
-
-    var genStaticKeysCached = cached(genStaticKeys$1);
-
-    /**
-     * Goal of the optimizer: walk the generated template AST tree
-     * and detect sub-trees that are purely static, i.e. parts of
-     * the DOM that never needs to change.
-     *
-     * Once we detect these sub-trees, we can:
-     *
-     * 1. Hoist them into constants, so that we no longer need to
-     *    create fresh nodes for them on each re-render;
-     * 2. Completely skip them in the patching process.
-     */
-    function optimize(root, options) {
-        if (!root) { return }
-        isStaticKey = genStaticKeysCached(options.staticKeys || '');
-        isPlatformReservedTag = options.isReservedTag || no;
-        // first pass: mark all non-static nodes.
-        markStatic$1(root);
-        // second pass: mark static roots.
-        markStaticRoots(root, false);
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
     }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
 
-    function genStaticKeys$1(keys) {
-        return makeMap(
-            'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
-            (keys ? ',' + keys : '')
-        )
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
     }
+  }
+}
 
-    function markStatic$1(node) {
-        node.static = isStatic(node);
-        if (node.type === 1) {
-            // do not make component slot content static. this avoids
-            // 1. components not able to mutate slot nodes
-            // 2. static slot content fails for hot-reloading
-            if (
-                !isPlatformReservedTag(node.tag) &&
-                node.tag !== 'slot' &&
-                node.attrsMap['inline-template'] == null
-            ) {
-                return
-            }
-            for (var i = 0, l = node.children.length; i < l; i++) {
-                var child = node.children[i];
-                markStatic$1(child);
-                if (!child.static) {
-                    node.static = false;
-                }
-            }
-            if (node.ifConditions) {
-                for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-                    var block = node.ifConditions[i$1].block;
-                    markStatic$1(block);
-                    if (!block.static) {
-                        node.static = false;
-                    }
-                }
-            }
-        }
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur);
     }
-
-    function markStaticRoots(node, isInFor) {
-        if (node.type === 1) {
-            if (node.static || node.once) {
-                node.staticInFor = isInFor;
-            }
-            // For a node to qualify as a static root, it should have children that
-            // are not just static text. Otherwise the cost of hoisting out will
-            // outweigh the benefits and it's better off to just always render it fresh.
-            if (node.static && node.children.length && !(
-                node.children.length === 1 &&
-                node.children[0].type === 3
-            )) {
-                node.staticRoot = true;
-                return
-            } else {
-                node.staticRoot = false;
-            }
-            if (node.children) {
-                for (var i = 0, l = node.children.length; i < l; i++) {
-                    markStaticRoots(node.children[i], isInFor || !!node.for);
-                }
-            }
-            if (node.ifConditions) {
-                for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-                    markStaticRoots(node.ifConditions[i$1].block, isInFor);
-                }
-            }
-        }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
     }
+  }
+}
 
-    function isStatic(node) {
-        if (node.type === 2) { // expression
-            return false
-        }
-        if (node.type === 3) { // text
-            return true
-        }
-        return !!(node.pre || (
-            !node.hasBindings && // no dynamic bindings
-            !node.if && !node.for && // not v-if or v-for or v-else
-            !isBuiltInTag(node.tag) && // not a built-in
-            isPlatformReservedTag(node.tag) && // not a component
-            !isDirectChildOfTemplateFor(node) &&
-            Object.keys(node).every(isStaticKey)
-        ))
+function setAttr (el, key, value) {
+  if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
     }
-
-    function isDirectChildOfTemplateFor(node) {
-        while (node.parent) {
-            node = node.parent;
-            if (node.tag !== 'template') {
-                return false
-            }
-            if (node.for) {
-                return true
-            }
-        }
-        return false
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
     }
-
-    /*  */
-
-    var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-    var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
-
-    // keyCode aliases
-    var keyCodes = {
-        esc: 27,
-        tab: 9,
-        enter: 13,
-        space: 32,
-        up: 38,
-        left: 37,
-        right: 39,
-        down: 40,
-        'delete': [8, 46]
-    };
-
-    // #4868: modifiers that prevent the execution of the listener
-    // need to explicitly return null so that we can determine whether to remove
-    // the listener for .once
-    var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
-
-    var modifierCode = {
-        stop: '$event.stopPropagation();',
-        prevent: '$event.preventDefault();',
-        self: genGuard("$event.target !== $event.currentTarget"),
-        ctrl: genGuard("!$event.ctrlKey"),
-        shift: genGuard("!$event.shiftKey"),
-        alt: genGuard("!$event.altKey"),
-        meta: genGuard("!$event.metaKey"),
-        left: genGuard("'button' in $event && $event.button !== 0"),
-        middle: genGuard("'button' in $event && $event.button !== 1"),
-        right: genGuard("'button' in $event && $event.button !== 2")
-    };
-
-    function genHandlers(
-        events,
-        isNative,
-        warn
-    ) {
-        var res = isNative ? 'nativeOn:{' : 'on:{';
-        for (var name in events) {
-            var handler = events[name];
-            // #5330: warn click.right, since right clicks do not actually fire click events.
-            if ("development" !== 'production' &&
-                name === 'click' &&
-                handler && handler.modifiers && handler.modifiers.right
-            ) {
-                warn(
-                    "Use \"contextmenu\" instead of \"click.right\" since right clicks " +
-                    "do not actually fire \"click\" events."
-                );
-            }
-            res += "\"" + name + "\":" + (genHandler(name, handler)) + ",";
-        }
-        return res.slice(0, -1) + '}'
-    }
-
-    function genHandler(
-        name,
-        handler
-    ) {
-        if (!handler) {
-            return 'function(){}'
-        }
-
-        if (Array.isArray(handler)) {
-            return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
-        }
-
-        var isMethodPath = simplePathRE.test(handler.value);
-        var isFunctionExpression = fnExpRE.test(handler.value);
-
-        if (!handler.modifiers) {
-            return isMethodPath || isFunctionExpression
-                ? handler.value
-                : ("function($event){" + (handler.value) + "}") // inline statement
-        } else {
-            var code = '';
-            var genModifierCode = '';
-            var keys = [];
-            for (var key in handler.modifiers) {
-                if (modifierCode[key]) {
-                    genModifierCode += modifierCode[key];
-                    // left/right
-                    if (keyCodes[key]) {
-                        keys.push(key);
-                    }
-                } else if (key === 'exact') {
-                    var modifiers = (handler.modifiers);
-                    genModifierCode += genGuard(
-                        ['ctrl', 'shift', 'alt', 'meta']
-                            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
-                            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
-                            .join('||')
-                    );
-                } else {
-                    keys.push(key);
-                }
-            }
-            if (keys.length) {
-                code += genKeyFilter(keys);
-            }
-            // Make sure modifiers like prevent and stop get executed after key filtering
-            if (genModifierCode) {
-                code += genModifierCode;
-            }
-            var handlerCode = isMethodPath
-                ? handler.value + '($event)'
-                : isFunctionExpression
-                    ? ("(" + (handler.value) + ")($event)")
-                    : handler.value;
-            return ("function($event){" + code + handlerCode + "}")
-        }
-    }
-
-    function genKeyFilter(keys) {
-        return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
-    }
-
-    function genFilterCode(key) {
-        var keyVal = parseInt(key, 10);
-        if (keyVal) {
-            return ("$event.keyCode!==" + keyVal)
-        }
-        var code = keyCodes[key];
-        return (
-            "_k($event.keyCode," +
-            (JSON.stringify(key)) + "," +
-            (JSON.stringify(code)) + "," +
-            "$event.key)"
-        )
-    }
-
-    /*  */
-
-    function on(el, dir) {
-        if ("development" !== 'production' && dir.modifiers) {
-            warn("v-on without argument does not support modifiers.");
-        }
-        el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
-    }
-
-    /*  */
-
-    function bind$1(el, dir) {
-        el.wrapData = function (code) {
-            return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+  } else {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // #7138: IE10 & 11 fires input event when setting placeholder on
+      // <textarea>... block the first input event and remove the blocker
+      // immediately.
+      /* istanbul ignore if */
+      if (
+        isIE && !isIE9 &&
+        el.tagName === 'TEXTAREA' &&
+        key === 'placeholder' && !el.__ieph
+      ) {
+        var blocker = function (e) {
+          e.stopImmediatePropagation();
+          el.removeEventListener('input', blocker);
         };
+        el.addEventListener('input', blocker);
+        // $flow-disable-line
+        el.__ieph = true; /* IE placeholder patched */
+      }
+      el.setAttribute(key, value);
     }
+  }
+}
 
-    /*  */
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
 
-    var baseDirectives = {
-        on: on,
-        bind: bind$1,
-        cloak: noop
-    };
+/*  */
 
-    /*  */
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
 
-    var CodegenState = function CodegenState(options) {
-        this.options = options;
-        this.warn = options.warn || baseWarn;
-        this.transforms = pluckModuleFunction(options.modules, 'transformCode');
-        this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
-        this.directives = extend(extend({}, baseDirectives), options.directives);
-        var isReservedTag = options.isReservedTag || no;
-        this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
-        this.onceId = 0;
-        this.staticRenderFns = [];
-    };
+  var cls = genClassForVnode(vnode);
 
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
 
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
 
-    function generate(
-        ast,
-        options
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+function parseFilters (exp) {
+  var inSingle = false;
+  var inDouble = false;
+  var inTemplateString = false;
+  var inRegex = false;
+  var curly = 0;
+  var square = 0;
+  var paren = 0;
+  var lastFilterIndex = 0;
+  var c, prev, i, expression, filters;
+
+  for (i = 0; i < exp.length; i++) {
+    prev = c;
+    c = exp.charCodeAt(i);
+    if (inSingle) {
+      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+    } else if (inDouble) {
+      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+    } else if (inTemplateString) {
+      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+    } else if (inRegex) {
+      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+    } else if (
+      c === 0x7C && // pipe
+      exp.charCodeAt(i + 1) !== 0x7C &&
+      exp.charCodeAt(i - 1) !== 0x7C &&
+      !curly && !square && !paren
     ) {
-        var state = new CodegenState(options);
-        var code = ast ? genElement(ast, state) : '_c("div")';
-        return {
-            render: ("with(this){return " + code + "}"),
-            staticRenderFns: state.staticRenderFns
+      if (expression === undefined) {
+        // first filter, end of expression
+        lastFilterIndex = i + 1;
+        expression = exp.slice(0, i).trim();
+      } else {
+        pushFilter();
+      }
+    } else {
+      switch (c) {
+        case 0x22: inDouble = true; break         // "
+        case 0x27: inSingle = true; break         // '
+        case 0x60: inTemplateString = true; break // `
+        case 0x28: paren++; break                 // (
+        case 0x29: paren--; break                 // )
+        case 0x5B: square++; break                // [
+        case 0x5D: square--; break                // ]
+        case 0x7B: curly++; break                 // {
+        case 0x7D: curly--; break                 // }
+      }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
         }
+        if (!p || !validDivisionCharRE.test(p)) {
+          inRegex = true;
+        }
+      }
+    }
+  }
+
+  if (expression === undefined) {
+    expression = exp.slice(0, i).trim();
+  } else if (lastFilterIndex !== 0) {
+    pushFilter();
+  }
+
+  function pushFilter () {
+    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+    lastFilterIndex = i + 1;
+  }
+
+  if (filters) {
+    for (i = 0; i < filters.length; i++) {
+      expression = wrapFilter(expression, filters[i]);
+    }
+  }
+
+  return expression
+}
+
+function wrapFilter (exp, filter) {
+  var i = filter.indexOf('(');
+  if (i < 0) {
+    // _f: resolveFilter
+    return ("_f(\"" + filter + "\")(" + exp + ")")
+  } else {
+    var name = filter.slice(0, i);
+    var args = filter.slice(i + 1);
+    return ("_f(\"" + name + "\")(" + exp + "," + args)
+  }
+}
+
+/*  */
+
+function baseWarn (msg) {
+  console.error(("[Vue compiler]: " + msg));
+}
+
+function pluckModuleFunction (
+  modules,
+  key
+) {
+  return modules
+    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+    : []
+}
+
+function addProp (el, name, value) {
+  (el.props || (el.props = [])).push({ name: name, value: value });
+  el.plain = false;
+}
+
+function addAttr (el, name, value) {
+  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
+  el.plain = false;
+}
+
+// add a raw attr (use this in preTransforms)
+function addRawAttr (el, name, value) {
+  el.attrsMap[name] = value;
+  el.attrsList.push({ name: name, value: value });
+}
+
+function addDirective (
+  el,
+  name,
+  rawName,
+  value,
+  arg,
+  modifiers
+) {
+  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
+  el.plain = false;
+}
+
+function addHandler (
+  el,
+  name,
+  value,
+  modifiers,
+  important,
+  warn
+) {
+  modifiers = modifiers || emptyObject;
+  // warn prevent and passive modifier
+  /* istanbul ignore if */
+  if (
+    "development" !== 'production' && warn &&
+    modifiers.prevent && modifiers.passive
+  ) {
+    warn(
+      'passive and prevent can\'t be used together. ' +
+      'Passive handler can\'t prevent default event.'
+    );
+  }
+
+  // check capture modifier
+  if (modifiers.capture) {
+    delete modifiers.capture;
+    name = '!' + name; // mark the event as captured
+  }
+  if (modifiers.once) {
+    delete modifiers.once;
+    name = '~' + name; // mark the event as once
+  }
+  /* istanbul ignore if */
+  if (modifiers.passive) {
+    delete modifiers.passive;
+    name = '&' + name; // mark the event as passive
+  }
+
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (name === 'click') {
+    if (modifiers.right) {
+      name = 'contextmenu';
+      delete modifiers.right;
+    } else if (modifiers.middle) {
+      name = 'mouseup';
+    }
+  }
+
+  var events;
+  if (modifiers.native) {
+    delete modifiers.native;
+    events = el.nativeEvents || (el.nativeEvents = {});
+  } else {
+    events = el.events || (el.events = {});
+  }
+
+  var newHandler = { value: value };
+  if (modifiers !== emptyObject) {
+    newHandler.modifiers = modifiers;
+  }
+
+  var handlers = events[name];
+  /* istanbul ignore if */
+  if (Array.isArray(handlers)) {
+    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+  } else if (handlers) {
+    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+  } else {
+    events[name] = newHandler;
+  }
+
+  el.plain = false;
+}
+
+function getBindingAttr (
+  el,
+  name,
+  getStatic
+) {
+  var dynamicValue =
+    getAndRemoveAttr(el, ':' + name) ||
+    getAndRemoveAttr(el, 'v-bind:' + name);
+  if (dynamicValue != null) {
+    return parseFilters(dynamicValue)
+  } else if (getStatic !== false) {
+    var staticValue = getAndRemoveAttr(el, name);
+    if (staticValue != null) {
+      return JSON.stringify(staticValue)
+    }
+  }
+}
+
+// note: this only removes the attr from the Array (attrsList) so that it
+// doesn't get processed by processAttrs.
+// By default it does NOT remove it from the map (attrsMap) because the map is
+// needed during codegen.
+function getAndRemoveAttr (
+  el,
+  name,
+  removeFromMap
+) {
+  var val;
+  if ((val = el.attrsMap[name]) != null) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      if (list[i].name === name) {
+        list.splice(i, 1);
+        break
+      }
+    }
+  }
+  if (removeFromMap) {
+    delete el.attrsMap[name];
+  }
+  return val
+}
+
+/*  */
+
+/**
+ * Cross-platform code generation for component v-model
+ */
+function genComponentModel (
+  el,
+  value,
+  modifiers
+) {
+  var ref = modifiers || {};
+  var number = ref.number;
+  var trim = ref.trim;
+
+  var baseValueExpression = '$$v';
+  var valueExpression = baseValueExpression;
+  if (trim) {
+    valueExpression =
+      "(typeof " + baseValueExpression + " === 'string'" +
+        "? " + baseValueExpression + ".trim()" +
+        ": " + baseValueExpression + ")";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+  var assignment = genAssignmentCode(value, valueExpression);
+
+  el.model = {
+    value: ("(" + value + ")"),
+    expression: ("\"" + value + "\""),
+    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+  };
+}
+
+/**
+ * Cross-platform codegen helper for generating v-model value assignment code.
+ */
+function genAssignmentCode (
+  value,
+  assignment
+) {
+  var res = parseModel(value);
+  if (res.key === null) {
+    return (value + "=" + assignment)
+  } else {
+    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+  }
+}
+
+/**
+ * Parse a v-model expression into a base path and a final key segment.
+ * Handles both dot-path and possible square brackets.
+ *
+ * Possible cases:
+ *
+ * - test
+ * - test[key]
+ * - test[test1[key]]
+ * - test["a"][key]
+ * - xxx.test[a[a].test1[key]]
+ * - test.xxx.a["asa"][test1[key]]
+ *
+ */
+
+var len;
+var str;
+var chr;
+var index$1;
+var expressionPos;
+var expressionEndPos;
+
+
+
+function parseModel (val) {
+  len = val.length;
+
+  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+    index$1 = val.lastIndexOf('.');
+    if (index$1 > -1) {
+      return {
+        exp: val.slice(0, index$1),
+        key: '"' + val.slice(index$1 + 1) + '"'
+      }
+    } else {
+      return {
+        exp: val,
+        key: null
+      }
+    }
+  }
+
+  str = val;
+  index$1 = expressionPos = expressionEndPos = 0;
+
+  while (!eof()) {
+    chr = next();
+    /* istanbul ignore if */
+    if (isStringStart(chr)) {
+      parseString(chr);
+    } else if (chr === 0x5B) {
+      parseBracket(chr);
+    }
+  }
+
+  return {
+    exp: val.slice(0, expressionPos),
+    key: val.slice(expressionPos + 1, expressionEndPos)
+  }
+}
+
+function next () {
+  return str.charCodeAt(++index$1)
+}
+
+function eof () {
+  return index$1 >= len
+}
+
+function isStringStart (chr) {
+  return chr === 0x22 || chr === 0x27
+}
+
+function parseBracket (chr) {
+  var inBracket = 1;
+  expressionPos = index$1;
+  while (!eof()) {
+    chr = next();
+    if (isStringStart(chr)) {
+      parseString(chr);
+      continue
+    }
+    if (chr === 0x5B) { inBracket++; }
+    if (chr === 0x5D) { inBracket--; }
+    if (inBracket === 0) {
+      expressionEndPos = index$1;
+      break
+    }
+  }
+}
+
+function parseString (chr) {
+  var stringQuote = chr;
+  while (!eof()) {
+    chr = next();
+    if (chr === stringQuote) {
+      break
+    }
+  }
+}
+
+/*  */
+
+var warn$1;
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+function model (
+  el,
+  dir,
+  _warn
+) {
+  warn$1 = _warn;
+  var value = dir.value;
+  var modifiers = dir.modifiers;
+  var tag = el.tag;
+  var type = el.attrsMap.type;
+
+  {
+    // inputs with type="file" are read only and setting the input's
+    // value will throw an error.
+    if (tag === 'input' && type === 'file') {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+        "File inputs are read only. Use a v-on:change listener instead."
+      );
+    }
+  }
+
+  if (el.component) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else if (tag === 'select') {
+    genSelect(el, value, modifiers);
+  } else if (tag === 'input' && type === 'checkbox') {
+    genCheckboxModel(el, value, modifiers);
+  } else if (tag === 'input' && type === 'radio') {
+    genRadioModel(el, value, modifiers);
+  } else if (tag === 'input' || tag === 'textarea') {
+    genDefaultModel(el, value, modifiers);
+  } else if (!config.isReservedTag(tag)) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else {
+    warn$1(
+      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+      "v-model is not supported on this element type. " +
+      'If you are working with contenteditable, it\'s recommended to ' +
+      'wrap a library dedicated for that purpose inside a custom component.'
+    );
+  }
+
+  // ensure runtime directive metadata
+  return true
+}
+
+function genCheckboxModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+  addProp(el, 'checked',
+    "Array.isArray(" + value + ")" +
+    "?_i(" + value + "," + valueBinding + ")>-1" + (
+      trueValueBinding === 'true'
+        ? (":(" + value + ")")
+        : (":_q(" + value + "," + trueValueBinding + ")")
+    )
+  );
+  addHandler(el, 'change',
+    "var $$a=" + value + "," +
+        '$$el=$event.target,' +
+        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+    'if(Array.isArray($$a)){' +
+      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+          '$$i=_i($$a,$$v);' +
+      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
+      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
+    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+    null, true
+  );
+}
+
+function genRadioModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+}
+
+function genSelect (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var selectedVal = "Array.prototype.filter" +
+    ".call($event.target.options,function(o){return o.selected})" +
+    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+    "return " + (number ? '_n(val)' : 'val') + "})";
+
+  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+  var code = "var $$selectedVal = " + selectedVal + ";";
+  code = code + " " + (genAssignmentCode(value, assignment));
+  addHandler(el, 'change', code, null, true);
+}
+
+function genDefaultModel (
+  el,
+  value,
+  modifiers
+) {
+  var type = el.attrsMap.type;
+
+  // warn if v-bind:value conflicts with v-model
+  {
+    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+    if (value$1) {
+      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+      warn$1(
+        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+        'because the latter already expands to a value binding internally'
+      );
+    }
+  }
+
+  var ref = modifiers || {};
+  var lazy = ref.lazy;
+  var number = ref.number;
+  var trim = ref.trim;
+  var needCompositionGuard = !lazy && type !== 'range';
+  var event = lazy
+    ? 'change'
+    : type === 'range'
+      ? RANGE_TOKEN
+      : 'input';
+
+  var valueExpression = '$event.target.value';
+  if (trim) {
+    valueExpression = "$event.target.value.trim()";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+
+  var code = genAssignmentCode(value, valueExpression);
+  if (needCompositionGuard) {
+    code = "if($event.target.composing)return;" + code;
+  }
+
+  addProp(el, 'value', ("(" + value + ")"));
+  addHandler(el, event, code, null, true);
+  if (trim || number) {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
+}
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler (handler, event, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+function add$1 (
+  event,
+  handler,
+  once$$1,
+  capture,
+  passive
+) {
+  handler = withMacroTask(handler);
+  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
+  target$1.addEventListener(
+    event,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  event,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    event,
+    handler._withTask || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (isUndef(props[key])) {
+      elm[key] = '';
+    }
+  }
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
     }
 
-    function genElement(el, state) {
-        if (el.staticRoot && !el.staticProcessed) {
-            return genStatic(el, state)
-        } else if (el.once && !el.onceProcessed) {
-            return genOnce(el, state)
-        } else if (el.for && !el.forProcessed) {
-            return genFor(el, state)
-        } else if (el.if && !el.ifProcessed) {
-            return genIf(el, state)
-        } else if (el.tag === 'template' && !el.slotTarget) {
-            return genChildren(el, state) || 'void 0'
-        } else if (el.tag === 'slot') {
-            return genSlot(el, state)
-        } else {
-            // component or element
-            var code;
-            if (el.component) {
-                code = genComponent(el.component, el, state);
-            } else {
-                var data = el.plain ? undefined : genData$2(el, state);
-
-                var children = el.inlineTemplate ? null : genChildren(el, state, true);
-                code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
-            }
-            // module transforms
-            for (var i = 0; i < state.transforms.length; i++) {
-                code = state.transforms[i](el, code);
-            }
-            return code
-        }
+    if (key === 'value') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else {
+      elm[key] = cur;
     }
+  }
+}
 
-    // hoist static sub-trees out
-    function genStatic(el, state) {
-        el.staticProcessed = true;
-        state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
-        return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.lazy) {
+      // inputs with lazy should only be updated when not in focus
+      return false
     }
-
-    // v-once
-    function genOnce(el, state) {
-        el.onceProcessed = true;
-        if (el.if && !el.ifProcessed) {
-            return genIf(el, state)
-        } else if (el.staticInFor) {
-            var key = '';
-            var parent = el.parent;
-            while (parent) {
-                if (parent.for) {
-                    key = parent.key;
-                    break
-                }
-                parent = parent.parent;
-            }
-            if (!key) {
-                "development" !== 'production' && state.warn(
-                    "v-once can only be used inside v-for that is keyed. "
-                );
-                return genElement(el, state)
-            }
-            return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
-        } else {
-            return genStatic(el, state)
-        }
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
     }
-
-    function genIf(
-        el,
-        state,
-        altGen,
-        altEmpty
-    ) {
-        el.ifProcessed = true; // avoid recursion
-        return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
     }
+  }
+  return value !== newVal
+}
 
-    function genIfConditions(
-        conditions,
-        state,
-        altGen,
-        altEmpty
-    ) {
-        if (!conditions.length) {
-            return altEmpty || '_e()'
-        }
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
 
-        var condition = conditions.shift();
-        if (condition.exp) {
-            return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
-        } else {
-            return ("" + (genTernaryExp(condition.block)))
-        }
+/*  */
 
-        // v-if with v-once should generate code like (a)?_m(0):_m(1)
-        function genTernaryExp(el) {
-            return altGen
-                ? altGen(el, state)
-                : el.once
-                    ? genOnce(el, state)
-                    : genElement(el, state)
-        }
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
     }
+  });
+  return res
+});
 
-    function genFor(
-        el,
-        state,
-        altGen,
-        altHelper
-    ) {
-        var exp = el.for;
-        var alias = el.alias;
-        var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-        var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
 
-        if ("development" !== 'production' &&
-            state.maybeComponent(el) &&
-            el.tag !== 'slot' &&
-            el.tag !== 'template' &&
-            !el.key
-        ) {
-            state.warn(
-                "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
-                "v-for should have explicit keys. " +
-                "See https://vuejs.org/guide/list.html#key for more info.",
-                true /* tip */
-            );
-        }
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
 
-        el.forProcessed = true; // avoid recursion
-        return (altHelper || '_l') + "((" + exp + ")," +
-            "function(" + alias + iterator1 + iterator2 + "){" +
-            "return " + ((altGen || genElement)(el, state)) +
-            '})'
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
     }
+  }
 
-    function genData$2(el, state) {
-        var data = '{';
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
 
-        // directives first.
-        // directives may mutate the el's other properties before they are generated.
-        var dirs = genDirectives(el, state);
-        if (dirs) { data += dirs + ','; }
-
-        // key
-        if (el.key) {
-            data += "key:" + (el.key) + ",";
-        }
-        // ref
-        if (el.ref) {
-            data += "ref:" + (el.ref) + ",";
-        }
-        if (el.refInFor) {
-            data += "refInFor:true,";
-        }
-        // pre
-        if (el.pre) {
-            data += "pre:true,";
-        }
-        // record original tag name for components using "is" attribute
-        if (el.component) {
-            data += "tag:\"" + (el.tag) + "\",";
-        }
-        // module data generation functions
-        for (var i = 0; i < state.dataGenFns.length; i++) {
-            data += state.dataGenFns[i](el);
-        }
-        // attributes
-        if (el.attrs) {
-            data += "attrs:{" + (genProps(el.attrs)) + "},";
-        }
-        // DOM props
-        if (el.props) {
-            data += "domProps:{" + (genProps(el.props)) + "},";
-        }
-        // event handlers
-        if (el.events) {
-            data += (genHandlers(el.events, false, state.warn)) + ",";
-        }
-        if (el.nativeEvents) {
-            data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
-        }
-        // slot target
-        // only for non-scoped slots
-        if (el.slotTarget && !el.slotScope) {
-            data += "slot:" + (el.slotTarget) + ",";
-        }
-        // scoped slots
-        if (el.scopedSlots) {
-            data += (genScopedSlots(el.scopedSlots, state)) + ",";
-        }
-        // component v-model
-        if (el.model) {
-            data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
-        }
-        // inline-template
-        if (el.inlineTemplate) {
-            var inlineTemplate = genInlineTemplate(el, state);
-            if (inlineTemplate) {
-                data += inlineTemplate + ",";
-            }
-        }
-        data = data.replace(/,$/, '') + '}';
-        // v-bind data wrap
-        if (el.wrapData) {
-            data = el.wrapData(data);
-        }
-        // v-on data wrap
-        if (el.wrapListeners) {
-            data = el.wrapListeners(data);
-        }
-        return data
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
     }
+  }
+  return res
+}
 
-    function genDirectives(el, state) {
-        var dirs = el.directives;
-        if (!dirs) { return }
-        var res = 'directives:[';
-        var hasRuntime = false;
-        var i, l, dir, needRuntime;
-        for (i = 0, l = dirs.length; i < l; i++) {
-            dir = dirs[i];
-            needRuntime = true;
-            var gen = state.directives[dir.name];
-            if (gen) {
-                // compile-time directive that manipulates AST.
-                // returns true if it also needs a runtime counterpart.
-                needRuntime = !!gen(el, dir, state.warn);
-            }
-            if (needRuntime) {
-                hasRuntime = true;
-                res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
-            }
-        }
-        if (hasRuntime) {
-            return res.slice(0, -1) + ']'
-        }
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
     }
+  }
+};
 
-    function genInlineTemplate(el, state) {
-        var ast = el.children[0];
-        if ("development" !== 'production' && (
-            el.children.length !== 1 || ast.type !== 1
-        )) {
-            state.warn('Inline-template components must have exactly one child element.');
-        }
-        if (ast.type === 1) {
-            var inlineRenderFns = generate(ast, state.options);
-            return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
-        }
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
     }
+  }
+});
 
-    function genScopedSlots(
-        slots,
-        state
-    ) {
-        return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-            return genScopedSlot(key, slots[key], state)
-        }).join(',')) + "])")
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
     }
-
-    function genScopedSlot(
-        key,
-        el,
-        state
-    ) {
-        if (el.for && !el.forProcessed) {
-            return genForScopedSlot(key, el, state)
-        }
-        var fn = "function(" + (String(el.slotScope)) + "){" +
-            "return " + (el.tag === 'template'
-                ? el.if
-                    ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
-                    : genChildren(el, state) || 'undefined'
-                : genElement(el, state)) + "}";
-        return ("{key:" + key + ",fn:" + fn + "}")
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
     }
+  }
+}
 
-    function genForScopedSlot(
-        key,
-        el,
-        state
-    ) {
-        var exp = el.for;
-        var alias = el.alias;
-        var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-        var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-        el.forProcessed = true; // avoid recursion
-        return "_l((" + exp + ")," +
-            "function(" + alias + iterator1 + iterator2 + "){" +
-            "return " + (genScopedSlot(key, el, state)) +
-            '})'
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
     }
-
-    function genChildren(
-        el,
-        state,
-        checkSkip,
-        altGenElement,
-        altGenNode
-    ) {
-        var children = el.children;
-        if (children.length) {
-            var el$1 = children[0];
-            // optimize single v-for
-            if (children.length === 1 &&
-                el$1.for &&
-                el$1.tag !== 'template' &&
-                el$1.tag !== 'slot'
-            ) {
-                return (altGenElement || genElement)(el$1, state)
-            }
-            var normalizationType = checkSkip
-                ? getNormalizationType(children, state.maybeComponent)
-                : 0;
-            var gen = altGenNode || genNode;
-            return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
-        }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
     }
+  }
+}
 
-    // determine the normalization needed for the children array.
-    // 0: no normalization needed
-    // 1: simple normalization needed (possible 1-level deep nested array)
-    // 2: full normalization needed
-    function getNormalizationType(
-        children,
-        maybeComponent
-    ) {
-        var res = 0;
-        for (var i = 0; i < children.length; i++) {
-            var el = children[i];
-            if (el.type !== 1) {
-                continue
-            }
-            if (needsNormalization(el) ||
-                (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
-                res = 2;
-                break
-            }
-            if (maybeComponent(el) ||
-                (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
-                res = 1;
-            }
-        }
-        return res
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
     }
-
-    function needsNormalization(el) {
-        return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+    if (!el.classList.length) {
+      el.removeAttribute('class');
     }
-
-    function genNode(node, state) {
-        if (node.type === 1) {
-            return genElement(node, state)
-        } if (node.type === 3 && node.isComment) {
-            return genComment(node)
-        } else {
-            return genText(node)
-        }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
     }
-
-    function genText(text) {
-        return ("_v(" + (text.type === 2
-            ? text.expression // no need for () because already wrapped in _s()
-            : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
     }
+  }
+}
 
-    function genComment(comment) {
-        return ("_e(" + (JSON.stringify(comment.text)) + ")")
+/*  */
+
+function resolveTransition (def) {
+  if (!def) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def === 'object') {
+    var res = {};
+    if (def.css !== false) {
+      extend(res, autoCssTransition(def.name || 'v'));
     }
+    extend(res, def);
+    return res
+  } else if (typeof def === 'string') {
+    return autoCssTransition(def)
+  }
+}
 
-    function genSlot(el, state) {
-        var slotName = el.slotName || '"default"';
-        var children = genChildren(el, state);
-        var res = "_t(" + slotName + (children ? ("," + children) : '');
-        var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
-        var bind$$1 = el.attrsMap['v-bind'];
-        if ((attrs || bind$$1) && !children) {
-            res += ",null";
-        }
-        if (attrs) {
-            res += "," + attrs;
-        }
-        if (bind$$1) {
-            res += (attrs ? '' : ',null') + "," + bind$$1;
-        }
-        return res + ')'
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
     }
-
-    // componentName is el.component, take it as argument to shun flow's pessimistic refinement
-    function genComponent(
-        componentName,
-        el,
-        state
-    ) {
-        var children = el.inlineTemplate ? null : genChildren(el, state, true);
-        return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
     }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
 
-    function genProps(props) {
-        var res = '';
-        for (var i = 0; i < props.length; i++) {
-            var prop = props[i];
-            res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
-        }
-        return res.slice(0, -1)
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
+  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = styles[animationProp + 'Delay'].split(', ');
+  var animationDurations = styles[animationProp + 'Duration'].split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
     }
-
-    // #3895, #4268
-    function transformSpecialNewlines(text) {
-        return text
-            .replace(/\u2028/g, '\\u2028')
-            .replace(/\u2029/g, '\\u2029')
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
     }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
 
-    /*  */
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
 
-    // these keywords should not appear inside expressions, but operators like
-    // typeof, instanceof and in are allowed
-    var prohibitedKeywordRE = new RegExp('\\b' + (
-        'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
-        'super,throw,while,yield,delete,export,import,return,switch,default,' +
-        'extends,finally,continue,debugger,function,arguments'
-    ).split(',').join('\\b|\\b') + '\\b');
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
 
-    // these unary operators should not be used as property/method names
-    var unaryOperatorsRE = new RegExp('\\b' + (
-        'delete,typeof,void'
-    ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+function toMs (s) {
+  return Number(s.slice(0, -1)) * 1000
+}
 
-    // check valid identifier for v-for
-    var identRE = /[A-Za-z_$][\w$]*/;
+/*  */
 
-    // strip strings in expressions
-    var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
 
-    // detect problematic expressions in a template
-    function detectErrors(ast) {
-        var errors = [];
-        if (ast) {
-            checkNode(ast, errors);
-        }
-        return errors
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    transitionNode = transitionNode.parent;
+    context = transitionNode.context;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if ("development" !== 'production' && explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
     }
-
-    function checkNode(node, errors) {
-        if (node.type === 1) {
-            for (var name in node.attrsMap) {
-                if (dirRE.test(name)) {
-                    var value = node.attrsMap[name];
-                    if (value) {
-                        if (name === 'v-for') {
-                            checkFor(node, ("v-for=\"" + value + "\""), errors);
-                        } else if (onRE.test(name)) {
-                            checkEvent(value, (name + "=\"" + value + "\""), errors);
-                        } else {
-                            checkExpression(value, (name + "=\"" + value + "\""), errors);
-                        }
-                    }
-                }
-            }
-            if (node.children) {
-                for (var i = 0; i < node.children.length; i++) {
-                    checkNode(node.children[i], errors);
-                }
-            }
-        } else if (node.type === 2) {
-            checkExpression(node.expression, node.text, errors);
-        }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
     }
+    el._enterCb = null;
+  });
 
-    function checkEvent(exp, text, errors) {
-        var stipped = exp.replace(stripStringRE, '');
-        var keywordMatch = stipped.match(unaryOperatorsRE);
-        if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-            errors.push(
-                "avoid using JavaScript unary operator as property name: " +
-                "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
-            );
-        }
-        checkExpression(exp, text, errors);
-    }
-
-    function checkFor(node, text, errors) {
-        checkExpression(node.for || '', text, errors);
-        checkIdentifier(node.alias, 'v-for alias', text, errors);
-        checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-        checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
-    }
-
-    function checkIdentifier(ident, type, text, errors) {
-        if (typeof ident === 'string' && !identRE.test(ident)) {
-            errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
-        }
-    }
-
-    function checkExpression(exp, text, errors) {
-        try {
-            new Function(("return " + exp));
-        } catch (e) {
-            var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-            if (keywordMatch) {
-                errors.push(
-                    "avoid using JavaScript keyword as property name: " +
-                    "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
-                );
-            } else {
-                errors.push(
-                    "invalid expression: " + (e.message) + " in\n\n" +
-                    "    " + exp + "\n\n" +
-                    "  Raw expression: " + (text.trim()) + "\n"
-                );
-            }
-        }
-    }
-
-    /*  */
-
-    function createFunction(code, errors) {
-        try {
-            return new Function(code)
-        } catch (err) {
-            errors.push({ err: err, code: code });
-            return noop
-        }
-    }
-
-    function createCompileToFunctionFn(compile) {
-        var cache = Object.create(null);
-
-        return function compileToFunctions(
-            template,
-            options,
-            vm
-        ) {
-            options = extend({}, options);
-            var warn$$1 = options.warn || warn;
-            delete options.warn;
-
-            /* istanbul ignore if */
-            {
-                // detect possible CSP restriction
-                try {
-                    new Function('return 1');
-                } catch (e) {
-                    if (e.toString().match(/unsafe-eval|CSP/)) {
-                        warn$$1(
-                            'It seems you are using the standalone build of Vue.js in an ' +
-                            'environment with Content Security Policy that prohibits unsafe-eval. ' +
-                            'The template compiler cannot work in this environment. Consider ' +
-                            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
-                            'templates into render functions.'
-                        );
-                    }
-                }
-            }
-
-            // check cache
-            var key = options.delimiters
-                ? String(options.delimiters) + template
-                : template;
-            if (cache[key]) {
-                return cache[key]
-            }
-
-            // compile
-            var compiled = compile(template, options);
-
-            // check compilation errors/tips
-            {
-                if (compiled.errors && compiled.errors.length) {
-                    warn$$1(
-                        "Error compiling template:\n\n" + template + "\n\n" +
-                        compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-                        vm
-                    );
-                }
-                if (compiled.tips && compiled.tips.length) {
-                    compiled.tips.forEach(function (msg) { return tip(msg, vm); });
-                }
-            }
-
-            // turn code into functions
-            var res = {};
-            var fnGenErrors = [];
-            res.render = createFunction(compiled.render, fnGenErrors);
-            res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
-                return createFunction(code, fnGenErrors)
-            });
-
-            // check function generation errors.
-            // this should only happen if there is a bug in the compiler itself.
-            // mostly for codegen development use
-            /* istanbul ignore if */
-            {
-                if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
-                    warn$$1(
-                        "Failed to generate render function:\n\n" +
-                        fnGenErrors.map(function (ref) {
-                            var err = ref.err;
-                            var code = ref.code;
-
-                            return ((err.toString()) + " in\n\n" + code + "\n");
-                        }).join('\n'),
-                        vm
-                    );
-                }
-            }
-
-            return (cache[key] = res)
-        }
-    }
-
-    /*  */
-
-    function createCompilerCreator(baseCompile) {
-        return function createCompiler(baseOptions) {
-            function compile(
-                template,
-                options
-            ) {
-                var finalOptions = Object.create(baseOptions);
-                var errors = [];
-                var tips = [];
-                finalOptions.warn = function (msg, tip) {
-                    (tip ? tips : errors).push(msg);
-                };
-
-                if (options) {
-                    // merge custom modules
-                    if (options.modules) {
-                        finalOptions.modules =
-                            (baseOptions.modules || []).concat(options.modules);
-                    }
-                    // merge custom directives
-                    if (options.directives) {
-                        finalOptions.directives = extend(
-                            Object.create(baseOptions.directives),
-                            options.directives
-                        );
-                    }
-                    // copy other options
-                    for (var key in options) {
-                        if (key !== 'modules' && key !== 'directives') {
-                            finalOptions[key] = options[key];
-                        }
-                    }
-                }
-
-                var compiled = baseCompile(template, finalOptions);
-                {
-                    errors.push.apply(errors, detectErrors(compiled.ast));
-                }
-                compiled.errors = errors;
-                compiled.tips = tips;
-                return compiled
-            }
-
-            return {
-                compile: compile,
-                compileToFunctions: createCompileToFunctionFn(compile)
-            }
-        }
-    }
-
-    /*  */
-
-    // `createCompilerCreator` allows creating compilers that use alternative
-    // parser/optimizer/codegen, e.g the SSR optimizing compiler.
-    // Here we just export a default compiler using the default parts.
-    var createCompiler = createCompilerCreator(function baseCompile(
-        template,
-        options
-    ) {
-        var ast = parse(template.trim(), options);
-        optimize(ast, options);
-        var code = generate(ast, options);
-        return {
-            ast: ast,
-            render: code.render,
-            staticRenderFns: code.staticRenderFns
-        }
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
     });
+  }
 
-    /*  */
-
-    var ref$1 = createCompiler(baseOptions);
-    var compileToFunctions = ref$1.compileToFunctions;
-
-    /*  */
-
-    var idToTemplate = cached(function (id) {
-        var el = query(id);
-        return el && el.innerHTML
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      addTransitionClass(el, toClass);
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled && !userWantsControl) {
+        if (isValidDuration(explicitEnterDuration)) {
+          setTimeout(cb, explicitEnterDuration);
+        } else {
+          whenTransitionEnds(el, type, cb);
+        }
+      }
     });
+  }
 
-    var mount = Vue$3.prototype.$mount;
-    Vue$3.prototype.$mount = function (
-        el,
-        hydrating
-    ) {
-        el = el && query(el);
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
 
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        addTransitionClass(el, leaveToClass);
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled && !userWantsControl) {
+          if (isValidDuration(explicitLeaveDuration)) {
+            setTimeout(cb, explicitLeaveDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+        }
         /* istanbul ignore if */
-        if (el === document.body || el === document.documentElement) {
-            "development" !== 'production' && warn(
-                "Do not mount Vue to <html> or <body> - mount to normal elements instead."
-            );
-            return this
+        if (isIE9) {
+          el.vmodel = true;
         }
+      }
+    }
+  },
 
-        var options = this.$options;
-        // resolve template/el and convert to render function
-        if (!options.render) {
-            var template = options.template;
-            if (template) {
-                if (typeof template === 'string') {
-                    if (template.charAt(0) === '#') {
-                        template = idToTemplate(template);
-                        /* istanbul ignore if */
-                        if ("development" !== 'production' && !template) {
-                            warn(
-                                ("Template element not found or is empty: " + (options.template)),
-                                this
-                            );
-                        }
-                    }
-                } else if (template.nodeType) {
-                    template = template.innerHTML;
-                } else {
-                    {
-                        warn('invalid template option:' + template, this);
-                    }
-                    return this
-                }
-            } else if (el) {
-                template = getOuterHTML(el);
-            }
-            if (template) {
-                /* istanbul ignore if */
-                if ("development" !== 'production' && config.performance && mark) {
-                    mark('compile');
-                }
-
-                var ref = compileToFunctions(template, {
-                    shouldDecodeNewlines: shouldDecodeNewlines,
-                    delimiters: options.delimiters,
-                    comments: options.comments
-                }, this);
-                var render = ref.render;
-                var staticRenderFns = ref.staticRenderFns;
-                options.render = render;
-                options.staticRenderFns = staticRenderFns;
-
-                /* istanbul ignore if */
-                if ("development" !== 'production' && config.performance && mark) {
-                    mark('compile end');
-                    measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
-                }
-            }
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
         }
-        return mount.call(this, el, hydrating)
-    };
+      }
+    }
+  }
+};
 
-    /**
-     * Get outerHTML of elements, taking care
-     * of SVG elements in IE as well.
-     */
-    function getOuterHTML(el) {
-        if (el.outerHTML) {
-            return el.outerHTML
-        } else {
-            var container = document.createElement('div');
-            container.appendChild(el.cloneNode(true));
-            return container.innerHTML
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    "development" !== 'production' && warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
         }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (value === oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+// Provides transition support for a single element/component.
+// supports transition mode (out-in / in-out)
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
     }
 
-    Vue$3.compile = compileToFunctions;
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
 
-    return Vue$3;
+    // warn multiple elements
+    if ("development" !== 'production' && children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if ("development" !== 'production' &&
+      mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+// Provides transition support for list items.
+// supports move transitions using the FLIP technique.
+
+// Because the vdom's children update algorithm is "unstable" - i.e.
+// it doesn't guarantee the relative positioning of removed elements,
+// we force transition-group to update its children into two passes:
+// in the first pass, we remove all nodes that need to be removed,
+// triggering their leaving transition; in the second pass, we insert/move
+// into the final desired state. This way in the second pass removed
+// nodes will remain where they should be.
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  beforeUpdate: function beforeUpdate () {
+    // force removing pass
+    this.__patch__(
+      this._vnode,
+      this.kept,
+      false, // hydrating
+      true // removeOnly (!important avoids unnecessary moves)
+    );
+    this._vnode = this.kept;
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue$3.config.mustUseProp = mustUseProp;
+Vue$3.config.isReservedTag = isReservedTag;
+Vue$3.config.isReservedAttr = isReservedAttr;
+Vue$3.config.getTagNamespace = getTagNamespace;
+Vue$3.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue$3.options.directives, platformDirectives);
+extend(Vue$3.options.components, platformComponents);
+
+// install platform patch function
+Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue$3.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+Vue$3.nextTick(function () {
+  if (config.devtools) {
+    if (devtools) {
+      devtools.emit('init', Vue$3);
+    } else if ("development" !== 'production' && isChrome) {
+      console[console.info ? 'info' : 'log'](
+        'Download the Vue Devtools extension for a better development experience:\n' +
+        'https://github.com/vuejs/vue-devtools'
+      );
+    }
+  }
+  if ("development" !== 'production' &&
+    config.productionTip !== false &&
+    inBrowser && typeof console !== 'undefined'
+  ) {
+    console[console.info ? 'info' : 'log'](
+      "You are running Vue in development mode.\n" +
+      "Make sure to turn on production mode when deploying for production.\n" +
+      "See more tips at https://vuejs.org/guide/deployment.html"
+    );
+  }
+}, 0);
+
+/*  */
+
+var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+var buildRegex = cached(function (delimiters) {
+  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+});
+
+
+
+function parseText (
+  text,
+  delimiters
+) {
+  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+  if (!tagRE.test(text)) {
+    return
+  }
+  var tokens = [];
+  var rawTokens = [];
+  var lastIndex = tagRE.lastIndex = 0;
+  var match, index, tokenValue;
+  while ((match = tagRE.exec(text))) {
+    index = match.index;
+    // push text token
+    if (index > lastIndex) {
+      rawTokens.push(tokenValue = text.slice(lastIndex, index));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    // tag token
+    var exp = parseFilters(match[1].trim());
+    tokens.push(("_s(" + exp + ")"));
+    rawTokens.push({ '@binding': exp });
+    lastIndex = index + match[0].length;
+  }
+  if (lastIndex < text.length) {
+    rawTokens.push(tokenValue = text.slice(lastIndex));
+    tokens.push(JSON.stringify(tokenValue));
+  }
+  return {
+    expression: tokens.join('+'),
+    tokens: rawTokens
+  }
+}
+
+/*  */
+
+function transformNode (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticClass = getAndRemoveAttr(el, 'class');
+  if ("development" !== 'production' && staticClass) {
+    var res = parseText(staticClass, options.delimiters);
+    if (res) {
+      warn(
+        "class=\"" + staticClass + "\": " +
+        'Interpolation inside attributes has been removed. ' +
+        'Use v-bind or the colon shorthand instead. For example, ' +
+        'instead of <div class="{{ val }}">, use <div :class="val">.'
+      );
+    }
+  }
+  if (staticClass) {
+    el.staticClass = JSON.stringify(staticClass);
+  }
+  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+  if (classBinding) {
+    el.classBinding = classBinding;
+  }
+}
+
+function genData (el) {
+  var data = '';
+  if (el.staticClass) {
+    data += "staticClass:" + (el.staticClass) + ",";
+  }
+  if (el.classBinding) {
+    data += "class:" + (el.classBinding) + ",";
+  }
+  return data
+}
+
+var klass$1 = {
+  staticKeys: ['staticClass'],
+  transformNode: transformNode,
+  genData: genData
+};
+
+/*  */
+
+function transformNode$1 (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticStyle = getAndRemoveAttr(el, 'style');
+  if (staticStyle) {
+    /* istanbul ignore if */
+    {
+      var res = parseText(staticStyle, options.delimiters);
+      if (res) {
+        warn(
+          "style=\"" + staticStyle + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div style="{{ val }}">, use <div :style="val">.'
+        );
+      }
+    }
+    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+  }
+
+  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+  if (styleBinding) {
+    el.styleBinding = styleBinding;
+  }
+}
+
+function genData$1 (el) {
+  var data = '';
+  if (el.staticStyle) {
+    data += "staticStyle:" + (el.staticStyle) + ",";
+  }
+  if (el.styleBinding) {
+    data += "style:(" + (el.styleBinding) + "),";
+  }
+  return data
+}
+
+var style$1 = {
+  staticKeys: ['staticStyle'],
+  transformNode: transformNode$1,
+  genData: genData$1
+};
+
+/*  */
+
+var decoder;
+
+var he = {
+  decode: function decode (html) {
+    decoder = decoder || document.createElement('div');
+    decoder.innerHTML = html;
+    return decoder.textContent
+  }
+};
+
+/*  */
+
+var isUnaryTag = makeMap(
+  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+  'link,meta,param,source,track,wbr'
+);
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var canBeLeftOpenTag = makeMap(
+  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+);
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var isNonPhrasingTag = makeMap(
+  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+  'title,tr,track'
+);
+
+/**
+ * Not type-checking this file because it's mostly vendor code.
+ */
+
+/*!
+ * HTML Parser By John Resig (ejohn.org)
+ * Modified by Juriy "kangax" Zaytsev
+ * Original code by Erik Arvidsson, Mozilla Public License
+ * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+ */
+
+// Regular Expressions for parsing tags and attributes
+var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
+// but for Vue templates we can enforce a simple charset
+var ncname = '[a-zA-Z_][\\w\\-\\.]*';
+var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+var startTagOpen = new RegExp(("^<" + qnameCapture));
+var startTagClose = /^\s*(\/?)>/;
+var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+var doctype = /^<!DOCTYPE [^>]+>/i;
+var comment = /^<!--/;
+var conditionalComment = /^<!\[/;
+
+var IS_REGEX_CAPTURING_BROKEN = false;
+'x'.replace(/x(.)?/g, function (m, g) {
+  IS_REGEX_CAPTURING_BROKEN = g === '';
+});
+
+// Special Elements (can contain anything)
+var isPlainTextElement = makeMap('script,style,textarea', true);
+var reCache = {};
+
+var decodingMap = {
+  '&lt;': '<',
+  '&gt;': '>',
+  '&quot;': '"',
+  '&amp;': '&',
+  '&#10;': '\n',
+  '&#9;': '\t'
+};
+var encodedAttr = /&(?:lt|gt|quot|amp);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+
+// #5992
+var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+function decodeAttr (value, shouldDecodeNewlines) {
+  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+  return value.replace(re, function (match) { return decodingMap[match]; })
+}
+
+function parseHTML (html, options) {
+  var stack = [];
+  var expectHTML = options.expectHTML;
+  var isUnaryTag$$1 = options.isUnaryTag || no;
+  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+  var index = 0;
+  var last, lastTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a plaintext content element like script/style
+    if (!lastTag || !isPlainTextElement(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (comment.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (options.shouldKeepComment) {
+              options.comment(html.substring(4, commentEnd));
+            }
+            advance(commentEnd + 3);
+            continue
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (conditionalComment.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            advance(conditionalEnd + 2);
+            continue
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          advance(doctypeMatch[0].length);
+          continue
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          var curIndex = index;
+          advance(endTagMatch[0].length);
+          parseEndTag(endTagMatch[1], curIndex, index);
+          continue
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag();
+        if (startTagMatch) {
+          handleStartTag(startTagMatch);
+          if (shouldIgnoreFirstNewline(lastTag, html)) {
+            advance(1);
+          }
+          continue
+        }
+      }
+
+      var text = (void 0), rest = (void 0), next = (void 0);
+      if (textEnd >= 0) {
+        rest = html.slice(textEnd);
+        while (
+          !endTag.test(rest) &&
+          !startTagOpen.test(rest) &&
+          !comment.test(rest) &&
+          !conditionalComment.test(rest)
+        ) {
+          // < in plain text, be forgiving and treat it as text
+          next = rest.indexOf('<', 1);
+          if (next < 0) { break }
+          textEnd += next;
+          rest = html.slice(textEnd);
+        }
+        text = html.substring(0, textEnd);
+        advance(textEnd);
+      }
+
+      if (textEnd < 0) {
+        text = html;
+        html = '';
+      }
+
+      if (options.chars && text) {
+        options.chars(text);
+      }
+    } else {
+      var endTagLength = 0;
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+        endTagLength = endTag.length;
+        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+        if (shouldIgnoreFirstNewline(stackedTag, text)) {
+          text = text.slice(1);
+        }
+        if (options.chars) {
+          options.chars(text);
+        }
+        return ''
+      });
+      index += html.length - rest$1.length;
+      html = rest$1;
+      parseEndTag(stackedTag, index - endTagLength, index);
+    }
+
+    if (html === last) {
+      options.chars && options.chars(html);
+      if ("development" !== 'production' && !stack.length && options.warn) {
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+      }
+      break
+    }
+  }
+
+  // Clean up any remaining tags
+  parseEndTag();
+
+  function advance (n) {
+    index += n;
+    html = html.substring(n);
+  }
+
+  function parseStartTag () {
+    var start = html.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: [],
+        start: index
+      };
+      advance(start[0].length);
+      var end, attr;
+      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+        advance(attr[0].length);
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        advance(end[0].length);
+        match.end = index;
+        return match
+      }
+    }
+  }
+
+  function handleStartTag (match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (expectHTML) {
+      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+        parseEndTag(lastTag);
+      }
+      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+        parseEndTag(tagName);
+      }
+    }
+
+    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+    var l = match.attrs.length;
+    var attrs = new Array(l);
+    for (var i = 0; i < l; i++) {
+      var args = match.attrs[i];
+      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
+      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
+        if (args[3] === '') { delete args[3]; }
+        if (args[4] === '') { delete args[4]; }
+        if (args[5] === '') { delete args[5]; }
+      }
+      var value = args[3] || args[4] || args[5] || '';
+      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+        ? options.shouldDecodeNewlinesForHref
+        : options.shouldDecodeNewlines;
+      attrs[i] = {
+        name: args[1],
+        value: decodeAttr(value, shouldDecodeNewlines)
+      };
+    }
+
+    if (!unary) {
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      lastTag = tagName;
+    }
+
+    if (options.start) {
+      options.start(tagName, attrs, unary, match.start, match.end);
+    }
+  }
+
+  function parseEndTag (tagName, start, end) {
+    var pos, lowerCasedTagName;
+    if (start == null) { start = index; }
+    if (end == null) { end = index; }
+
+    if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
+    }
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+          break
+        }
+      }
+    } else {
+      // If no tag name is provided, clean shop
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if ("development" !== 'production' &&
+          (i > pos || !tagName) &&
+          options.warn
+        ) {
+          options.warn(
+            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
+          );
+        }
+        if (options.end) {
+          options.end(stack[i].tag, start, end);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    } else if (lowerCasedTagName === 'br') {
+      if (options.start) {
+        options.start(tagName, [], true, start, end);
+      }
+    } else if (lowerCasedTagName === 'p') {
+      if (options.start) {
+        options.start(tagName, [], false, start, end);
+      }
+      if (options.end) {
+        options.end(tagName, start, end);
+      }
+    }
+  }
+}
+
+/*  */
+
+var onRE = /^@|^v-on:/;
+var dirRE = /^v-|^@|^:/;
+var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
+var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+var stripParensRE = /^\(|\)$/g;
+
+var argRE = /:(.*)$/;
+var bindRE = /^:|^v-bind:/;
+var modifierRE = /\.[^.]+/g;
+
+var decodeHTMLCached = cached(he.decode);
+
+// configurable state
+var warn$2;
+var delimiters;
+var transforms;
+var preTransforms;
+var postTransforms;
+var platformIsPreTag;
+var platformMustUseProp;
+var platformGetTagNamespace;
+
+
+
+function createASTElement (
+  tag,
+  attrs,
+  parent
+) {
+  return {
+    type: 1,
+    tag: tag,
+    attrsList: attrs,
+    attrsMap: makeAttrsMap(attrs),
+    parent: parent,
+    children: []
+  }
+}
+
+/**
+ * Convert HTML string to AST.
+ */
+function parse (
+  template,
+  options
+) {
+  warn$2 = options.warn || baseWarn;
+
+  platformIsPreTag = options.isPreTag || no;
+  platformMustUseProp = options.mustUseProp || no;
+  platformGetTagNamespace = options.getTagNamespace || no;
+
+  transforms = pluckModuleFunction(options.modules, 'transformNode');
+  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+  delimiters = options.delimiters;
+
+  var stack = [];
+  var preserveWhitespace = options.preserveWhitespace !== false;
+  var root;
+  var currentParent;
+  var inVPre = false;
+  var inPre = false;
+  var warned = false;
+
+  function warnOnce (msg) {
+    if (!warned) {
+      warned = true;
+      warn$2(msg);
+    }
+  }
+
+  function closeElement (element) {
+    // check pre state
+    if (element.pre) {
+      inVPre = false;
+    }
+    if (platformIsPreTag(element.tag)) {
+      inPre = false;
+    }
+    // apply post-transforms
+    for (var i = 0; i < postTransforms.length; i++) {
+      postTransforms[i](element, options);
+    }
+  }
+
+  parseHTML(template, {
+    warn: warn$2,
+    expectHTML: options.expectHTML,
+    isUnaryTag: options.isUnaryTag,
+    canBeLeftOpenTag: options.canBeLeftOpenTag,
+    shouldDecodeNewlines: options.shouldDecodeNewlines,
+    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+    shouldKeepComment: options.comments,
+    start: function start (tag, attrs, unary) {
+      // check namespace.
+      // inherit parent ns if there is one
+      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+      // handle IE svg bug
+      /* istanbul ignore if */
+      if (isIE && ns === 'svg') {
+        attrs = guardIESVGBug(attrs);
+      }
+
+      var element = createASTElement(tag, attrs, currentParent);
+      if (ns) {
+        element.ns = ns;
+      }
+
+      if (isForbiddenTag(element) && !isServerRendering()) {
+        element.forbidden = true;
+        "development" !== 'production' && warn$2(
+          'Templates should only be responsible for mapping the state to the ' +
+          'UI. Avoid placing tags with side-effects in your templates, such as ' +
+          "<" + tag + ">" + ', as they will not be parsed.'
+        );
+      }
+
+      // apply pre-transforms
+      for (var i = 0; i < preTransforms.length; i++) {
+        element = preTransforms[i](element, options) || element;
+      }
+
+      if (!inVPre) {
+        processPre(element);
+        if (element.pre) {
+          inVPre = true;
+        }
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = true;
+      }
+      if (inVPre) {
+        processRawAttrs(element);
+      } else if (!element.processed) {
+        // structural directives
+        processFor(element);
+        processIf(element);
+        processOnce(element);
+        // element-scope stuff
+        processElement(element, options);
+      }
+
+      function checkRootConstraints (el) {
+        {
+          if (el.tag === 'slot' || el.tag === 'template') {
+            warnOnce(
+              "Cannot use <" + (el.tag) + "> as component root element because it may " +
+              'contain multiple nodes.'
+            );
+          }
+          if (el.attrsMap.hasOwnProperty('v-for')) {
+            warnOnce(
+              'Cannot use v-for on stateful component root element because ' +
+              'it renders multiple elements.'
+            );
+          }
+        }
+      }
+
+      // tree management
+      if (!root) {
+        root = element;
+        checkRootConstraints(root);
+      } else if (!stack.length) {
+        // allow root elements with v-if, v-else-if and v-else
+        if (root.if && (element.elseif || element.else)) {
+          checkRootConstraints(element);
+          addIfCondition(root, {
+            exp: element.elseif,
+            block: element
+          });
+        } else {
+          warnOnce(
+            "Component template should contain exactly one root element. " +
+            "If you are using v-if on multiple elements, " +
+            "use v-else-if to chain them instead."
+          );
+        }
+      }
+      if (currentParent && !element.forbidden) {
+        if (element.elseif || element.else) {
+          processIfConditions(element, currentParent);
+        } else if (element.slotScope) { // scoped slot
+          currentParent.plain = false;
+          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        } else {
+          currentParent.children.push(element);
+          element.parent = currentParent;
+        }
+      }
+      if (!unary) {
+        currentParent = element;
+        stack.push(element);
+      } else {
+        closeElement(element);
+      }
+    },
+
+    end: function end () {
+      // remove trailing whitespace
+      var element = stack[stack.length - 1];
+      var lastNode = element.children[element.children.length - 1];
+      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
+        element.children.pop();
+      }
+      // pop stack
+      stack.length -= 1;
+      currentParent = stack[stack.length - 1];
+      closeElement(element);
+    },
+
+    chars: function chars (text) {
+      if (!currentParent) {
+        {
+          if (text === template) {
+            warnOnce(
+              'Component template requires a root element, rather than just text.'
+            );
+          } else if ((text = text.trim())) {
+            warnOnce(
+              ("text \"" + text + "\" outside root element will be ignored.")
+            );
+          }
+        }
+        return
+      }
+      // IE textarea placeholder bug
+      /* istanbul ignore if */
+      if (isIE &&
+        currentParent.tag === 'textarea' &&
+        currentParent.attrsMap.placeholder === text
+      ) {
+        return
+      }
+      var children = currentParent.children;
+      text = inPre || text.trim()
+        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
+        // only preserve whitespace if its not right after a starting tag
+        : preserveWhitespace && children.length ? ' ' : '';
+      if (text) {
+        var res;
+        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+          children.push({
+            type: 2,
+            expression: res.expression,
+            tokens: res.tokens,
+            text: text
+          });
+        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+          children.push({
+            type: 3,
+            text: text
+          });
+        }
+      }
+    },
+    comment: function comment (text) {
+      currentParent.children.push({
+        type: 3,
+        text: text,
+        isComment: true
+      });
+    }
+  });
+  return root
+}
+
+function processPre (el) {
+  if (getAndRemoveAttr(el, 'v-pre') != null) {
+    el.pre = true;
+  }
+}
+
+function processRawAttrs (el) {
+  var l = el.attrsList.length;
+  if (l) {
+    var attrs = el.attrs = new Array(l);
+    for (var i = 0; i < l; i++) {
+      attrs[i] = {
+        name: el.attrsList[i].name,
+        value: JSON.stringify(el.attrsList[i].value)
+      };
+    }
+  } else if (!el.pre) {
+    // non root node in pre blocks with no attributes
+    el.plain = true;
+  }
+}
+
+function processElement (element, options) {
+  processKey(element);
+
+  // determine whether this is a plain element after
+  // removing structural attributes
+  element.plain = !element.key && !element.attrsList.length;
+
+  processRef(element);
+  processSlot(element);
+  processComponent(element);
+  for (var i = 0; i < transforms.length; i++) {
+    element = transforms[i](element, options) || element;
+  }
+  processAttrs(element);
+}
+
+function processKey (el) {
+  var exp = getBindingAttr(el, 'key');
+  if (exp) {
+    if ("development" !== 'production' && el.tag === 'template') {
+      warn$2("<template> cannot be keyed. Place the key on real elements instead.");
+    }
+    el.key = exp;
+  }
+}
+
+function processRef (el) {
+  var ref = getBindingAttr(el, 'ref');
+  if (ref) {
+    el.ref = ref;
+    el.refInFor = checkInFor(el);
+  }
+}
+
+function processFor (el) {
+  var exp;
+  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+    var res = parseFor(exp);
+    if (res) {
+      extend(el, res);
+    } else {
+      warn$2(
+        ("Invalid v-for expression: " + exp)
+      );
+    }
+  }
+}
+
+function parseFor (exp) {
+  var inMatch = exp.match(forAliasRE);
+  if (!inMatch) { return }
+  var res = {};
+  res.for = inMatch[2].trim();
+  var alias = inMatch[1].trim().replace(stripParensRE, '');
+  var iteratorMatch = alias.match(forIteratorRE);
+  if (iteratorMatch) {
+    res.alias = alias.replace(forIteratorRE, '');
+    res.iterator1 = iteratorMatch[1].trim();
+    if (iteratorMatch[2]) {
+      res.iterator2 = iteratorMatch[2].trim();
+    }
+  } else {
+    res.alias = alias;
+  }
+  return res
+}
+
+function processIf (el) {
+  var exp = getAndRemoveAttr(el, 'v-if');
+  if (exp) {
+    el.if = exp;
+    addIfCondition(el, {
+      exp: exp,
+      block: el
+    });
+  } else {
+    if (getAndRemoveAttr(el, 'v-else') != null) {
+      el.else = true;
+    }
+    var elseif = getAndRemoveAttr(el, 'v-else-if');
+    if (elseif) {
+      el.elseif = elseif;
+    }
+  }
+}
+
+function processIfConditions (el, parent) {
+  var prev = findPrevElement(parent.children);
+  if (prev && prev.if) {
+    addIfCondition(prev, {
+      exp: el.elseif,
+      block: el
+    });
+  } else {
+    warn$2(
+      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+      "used on element <" + (el.tag) + "> without corresponding v-if."
+    );
+  }
+}
+
+function findPrevElement (children) {
+  var i = children.length;
+  while (i--) {
+    if (children[i].type === 1) {
+      return children[i]
+    } else {
+      if ("development" !== 'production' && children[i].text !== ' ') {
+        warn$2(
+          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+          "will be ignored."
+        );
+      }
+      children.pop();
+    }
+  }
+}
+
+function addIfCondition (el, condition) {
+  if (!el.ifConditions) {
+    el.ifConditions = [];
+  }
+  el.ifConditions.push(condition);
+}
+
+function processOnce (el) {
+  var once$$1 = getAndRemoveAttr(el, 'v-once');
+  if (once$$1 != null) {
+    el.once = true;
+  }
+}
+
+function processSlot (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if ("development" !== 'production' && el.key) {
+      warn$2(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead."
+      );
+    }
+  } else {
+    var slotScope;
+    if (el.tag === 'template') {
+      slotScope = getAndRemoveAttr(el, 'scope');
+      /* istanbul ignore if */
+      if ("development" !== 'production' && slotScope) {
+        warn$2(
+          "the \"scope\" attribute for scoped slots have been deprecated and " +
+          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+          "can also be used on plain elements in addition to <template> to " +
+          "denote scoped slots.",
+          true
+        );
+      }
+      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if ("development" !== 'production' && el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
+      el.slotScope = slotScope;
+    }
+    var slotTarget = getBindingAttr(el, 'slot');
+    if (slotTarget) {
+      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+      // preserve slot as an attribute for native shadow DOM compat
+      // only for non-scoped slots.
+      if (el.tag !== 'template' && !el.slotScope) {
+        addAttr(el, 'slot', slotTarget);
+      }
+    }
+  }
+}
+
+function processComponent (el) {
+  var binding;
+  if ((binding = getBindingAttr(el, 'is'))) {
+    el.component = binding;
+  }
+  if (getAndRemoveAttr(el, 'inline-template') != null) {
+    el.inlineTemplate = true;
+  }
+}
+
+function processAttrs (el) {
+  var list = el.attrsList;
+  var i, l, name, rawName, value, modifiers, isProp;
+  for (i = 0, l = list.length; i < l; i++) {
+    name = rawName = list[i].name;
+    value = list[i].value;
+    if (dirRE.test(name)) {
+      // mark element as dynamic
+      el.hasBindings = true;
+      // modifiers
+      modifiers = parseModifiers(name);
+      if (modifiers) {
+        name = name.replace(modifierRE, '');
+      }
+      if (bindRE.test(name)) { // v-bind
+        name = name.replace(bindRE, '');
+        value = parseFilters(value);
+        isProp = false;
+        if (modifiers) {
+          if (modifiers.prop) {
+            isProp = true;
+            name = camelize(name);
+            if (name === 'innerHtml') { name = 'innerHTML'; }
+          }
+          if (modifiers.camel) {
+            name = camelize(name);
+          }
+          if (modifiers.sync) {
+            addHandler(
+              el,
+              ("update:" + (camelize(name))),
+              genAssignmentCode(value, "$event")
+            );
+          }
+        }
+        if (isProp || (
+          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+        )) {
+          addProp(el, name, value);
+        } else {
+          addAttr(el, name, value);
+        }
+      } else if (onRE.test(name)) { // v-on
+        name = name.replace(onRE, '');
+        addHandler(el, name, value, modifiers, false, warn$2);
+      } else { // normal directives
+        name = name.replace(dirRE, '');
+        // parse arg
+        var argMatch = name.match(argRE);
+        var arg = argMatch && argMatch[1];
+        if (arg) {
+          name = name.slice(0, -(arg.length + 1));
+        }
+        addDirective(el, name, rawName, value, arg, modifiers);
+        if ("development" !== 'production' && name === 'model') {
+          checkForAliasModel(el, value);
+        }
+      }
+    } else {
+      // literal attribute
+      {
+        var res = parseText(value, delimiters);
+        if (res) {
+          warn$2(
+            name + "=\"" + value + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div id="{{ val }}">, use <div :id="val">.'
+          );
+        }
+      }
+      addAttr(el, name, JSON.stringify(value));
+      // #6887 firefox doesn't update muted state if set via attribute
+      // even immediately after element creation
+      if (!el.component &&
+          name === 'muted' &&
+          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+        addProp(el, name, 'true');
+      }
+    }
+  }
+}
+
+function checkInFor (el) {
+  var parent = el;
+  while (parent) {
+    if (parent.for !== undefined) {
+      return true
+    }
+    parent = parent.parent;
+  }
+  return false
+}
+
+function parseModifiers (name) {
+  var match = name.match(modifierRE);
+  if (match) {
+    var ret = {};
+    match.forEach(function (m) { ret[m.slice(1)] = true; });
+    return ret
+  }
+}
+
+function makeAttrsMap (attrs) {
+  var map = {};
+  for (var i = 0, l = attrs.length; i < l; i++) {
+    if (
+      "development" !== 'production' &&
+      map[attrs[i].name] && !isIE && !isEdge
+    ) {
+      warn$2('duplicate attribute: ' + attrs[i].name);
+    }
+    map[attrs[i].name] = attrs[i].value;
+  }
+  return map
+}
+
+// for script (e.g. type="x/template") or style, do not decode content
+function isTextTag (el) {
+  return el.tag === 'script' || el.tag === 'style'
+}
+
+function isForbiddenTag (el) {
+  return (
+    el.tag === 'style' ||
+    (el.tag === 'script' && (
+      !el.attrsMap.type ||
+      el.attrsMap.type === 'text/javascript'
+    ))
+  )
+}
+
+var ieNSBug = /^xmlns:NS\d+/;
+var ieNSPrefix = /^NS\d+:/;
+
+/* istanbul ignore next */
+function guardIESVGBug (attrs) {
+  var res = [];
+  for (var i = 0; i < attrs.length; i++) {
+    var attr = attrs[i];
+    if (!ieNSBug.test(attr.name)) {
+      attr.name = attr.name.replace(ieNSPrefix, '');
+      res.push(attr);
+    }
+  }
+  return res
+}
+
+function checkForAliasModel (el, value) {
+  var _el = el;
+  while (_el) {
+    if (_el.for && _el.alias === value) {
+      warn$2(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "You are binding v-model directly to a v-for iteration alias. " +
+        "This will not be able to modify the v-for source array because " +
+        "writing to the alias is like modifying a function local variable. " +
+        "Consider using an array of objects and use v-model on an object property instead."
+      );
+    }
+    _el = _el.parent;
+  }
+}
+
+/*  */
+
+/**
+ * Expand input[v-model] with dyanmic type bindings into v-if-else chains
+ * Turn this:
+ *   <input v-model="data[type]" :type="type">
+ * into this:
+ *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
+ *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
+ *   <input v-else :type="type" v-model="data[type]">
+ */
+
+function preTransformNode (el, options) {
+  if (el.tag === 'input') {
+    var map = el.attrsMap;
+    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
+      var typeBinding = getBindingAttr(el, 'type');
+      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+      // 1. checkbox
+      var branch0 = cloneASTElement(el);
+      // process for on the main node
+      processFor(branch0);
+      addRawAttr(branch0, 'type', 'checkbox');
+      processElement(branch0, options);
+      branch0.processed = true; // prevent it from double-processed
+      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+      addIfCondition(branch0, {
+        exp: branch0.if,
+        block: branch0
+      });
+      // 2. add radio else-if condition
+      var branch1 = cloneASTElement(el);
+      getAndRemoveAttr(branch1, 'v-for', true);
+      addRawAttr(branch1, 'type', 'radio');
+      processElement(branch1, options);
+      addIfCondition(branch0, {
+        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+        block: branch1
+      });
+      // 3. other
+      var branch2 = cloneASTElement(el);
+      getAndRemoveAttr(branch2, 'v-for', true);
+      addRawAttr(branch2, ':type', typeBinding);
+      processElement(branch2, options);
+      addIfCondition(branch0, {
+        exp: ifCondition,
+        block: branch2
+      });
+
+      if (hasElse) {
+        branch0.else = true;
+      } else if (elseIfCondition) {
+        branch0.elseif = elseIfCondition;
+      }
+
+      return branch0
+    }
+  }
+}
+
+function cloneASTElement (el) {
+  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+}
+
+var model$2 = {
+  preTransformNode: preTransformNode
+};
+
+var modules$1 = [
+  klass$1,
+  style$1,
+  model$2
+];
+
+/*  */
+
+function text (el, dir) {
+  if (dir.value) {
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
+  }
+}
+
+/*  */
+
+function html (el, dir) {
+  if (dir.value) {
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
+  }
+}
+
+var directives$1 = {
+  model: model,
+  text: text,
+  html: html
+};
+
+/*  */
+
+var baseOptions = {
+  expectHTML: true,
+  modules: modules$1,
+  directives: directives$1,
+  isPreTag: isPreTag,
+  isUnaryTag: isUnaryTag,
+  mustUseProp: mustUseProp,
+  canBeLeftOpenTag: canBeLeftOpenTag,
+  isReservedTag: isReservedTag,
+  getTagNamespace: getTagNamespace,
+  staticKeys: genStaticKeys(modules$1)
+};
+
+/*  */
+
+var isStaticKey;
+var isPlatformReservedTag;
+
+var genStaticKeysCached = cached(genStaticKeys$1);
+
+/**
+ * Goal of the optimizer: walk the generated template AST tree
+ * and detect sub-trees that are purely static, i.e. parts of
+ * the DOM that never needs to change.
+ *
+ * Once we detect these sub-trees, we can:
+ *
+ * 1. Hoist them into constants, so that we no longer need to
+ *    create fresh nodes for them on each re-render;
+ * 2. Completely skip them in the patching process.
+ */
+function optimize (root, options) {
+  if (!root) { return }
+  isStaticKey = genStaticKeysCached(options.staticKeys || '');
+  isPlatformReservedTag = options.isReservedTag || no;
+  // first pass: mark all non-static nodes.
+  markStatic$1(root);
+  // second pass: mark static roots.
+  markStaticRoots(root, false);
+}
+
+function genStaticKeys$1 (keys) {
+  return makeMap(
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    (keys ? ',' + keys : '')
+  )
+}
+
+function markStatic$1 (node) {
+  node.static = isStatic(node);
+  if (node.type === 1) {
+    // do not make component slot content static. this avoids
+    // 1. components not able to mutate slot nodes
+    // 2. static slot content fails for hot-reloading
+    if (
+      !isPlatformReservedTag(node.tag) &&
+      node.tag !== 'slot' &&
+      node.attrsMap['inline-template'] == null
+    ) {
+      return
+    }
+    for (var i = 0, l = node.children.length; i < l; i++) {
+      var child = node.children[i];
+      markStatic$1(child);
+      if (!child.static) {
+        node.static = false;
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        var block = node.ifConditions[i$1].block;
+        markStatic$1(block);
+        if (!block.static) {
+          node.static = false;
+        }
+      }
+    }
+  }
+}
+
+function markStaticRoots (node, isInFor) {
+  if (node.type === 1) {
+    if (node.static || node.once) {
+      node.staticInFor = isInFor;
+    }
+    // For a node to qualify as a static root, it should have children that
+    // are not just static text. Otherwise the cost of hoisting out will
+    // outweigh the benefits and it's better off to just always render it fresh.
+    if (node.static && node.children.length && !(
+      node.children.length === 1 &&
+      node.children[0].type === 3
+    )) {
+      node.staticRoot = true;
+      return
+    } else {
+      node.staticRoot = false;
+    }
+    if (node.children) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        markStaticRoots(node.children[i], isInFor || !!node.for);
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        markStaticRoots(node.ifConditions[i$1].block, isInFor);
+      }
+    }
+  }
+}
+
+function isStatic (node) {
+  if (node.type === 2) { // expression
+    return false
+  }
+  if (node.type === 3) { // text
+    return true
+  }
+  return !!(node.pre || (
+    !node.hasBindings && // no dynamic bindings
+    !node.if && !node.for && // not v-if or v-for or v-else
+    !isBuiltInTag(node.tag) && // not a built-in
+    isPlatformReservedTag(node.tag) && // not a component
+    !isDirectChildOfTemplateFor(node) &&
+    Object.keys(node).every(isStaticKey)
+  ))
+}
+
+function isDirectChildOfTemplateFor (node) {
+  while (node.parent) {
+    node = node.parent;
+    if (node.tag !== 'template') {
+      return false
+    }
+    if (node.for) {
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
+var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+
+// keyCode aliases
+var keyCodes = {
+  esc: 27,
+  tab: 9,
+  enter: 13,
+  space: 32,
+  up: 38,
+  left: 37,
+  right: 39,
+  down: 40,
+  'delete': [8, 46]
+};
+
+// #4868: modifiers that prevent the execution of the listener
+// need to explicitly return null so that we can determine whether to remove
+// the listener for .once
+var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+var modifierCode = {
+  stop: '$event.stopPropagation();',
+  prevent: '$event.preventDefault();',
+  self: genGuard("$event.target !== $event.currentTarget"),
+  ctrl: genGuard("!$event.ctrlKey"),
+  shift: genGuard("!$event.shiftKey"),
+  alt: genGuard("!$event.altKey"),
+  meta: genGuard("!$event.metaKey"),
+  left: genGuard("'button' in $event && $event.button !== 0"),
+  middle: genGuard("'button' in $event && $event.button !== 1"),
+  right: genGuard("'button' in $event && $event.button !== 2")
+};
+
+function genHandlers (
+  events,
+  isNative,
+  warn
+) {
+  var res = isNative ? 'nativeOn:{' : 'on:{';
+  for (var name in events) {
+    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
+  }
+  return res.slice(0, -1) + '}'
+}
+
+function genHandler (
+  name,
+  handler
+) {
+  if (!handler) {
+    return 'function(){}'
+  }
+
+  if (Array.isArray(handler)) {
+    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
+  }
+
+  var isMethodPath = simplePathRE.test(handler.value);
+  var isFunctionExpression = fnExpRE.test(handler.value);
+
+  if (!handler.modifiers) {
+    if (isMethodPath || isFunctionExpression) {
+      return handler.value
+    }
+    /* istanbul ignore if */
+    return ("function($event){" + (handler.value) + "}") // inline statement
+  } else {
+    var code = '';
+    var genModifierCode = '';
+    var keys = [];
+    for (var key in handler.modifiers) {
+      if (modifierCode[key]) {
+        genModifierCode += modifierCode[key];
+        // left/right
+        if (keyCodes[key]) {
+          keys.push(key);
+        }
+      } else if (key === 'exact') {
+        var modifiers = (handler.modifiers);
+        genModifierCode += genGuard(
+          ['ctrl', 'shift', 'alt', 'meta']
+            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+            .join('||')
+        );
+      } else {
+        keys.push(key);
+      }
+    }
+    if (keys.length) {
+      code += genKeyFilter(keys);
+    }
+    // Make sure modifiers like prevent and stop get executed after key filtering
+    if (genModifierCode) {
+      code += genModifierCode;
+    }
+    var handlerCode = isMethodPath
+      ? handler.value + '($event)'
+      : isFunctionExpression
+        ? ("(" + (handler.value) + ")($event)")
+        : handler.value;
+    /* istanbul ignore if */
+    return ("function($event){" + code + handlerCode + "}")
+  }
+}
+
+function genKeyFilter (keys) {
+  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
+}
+
+function genFilterCode (key) {
+  var keyVal = parseInt(key, 10);
+  if (keyVal) {
+    return ("$event.keyCode!==" + keyVal)
+  }
+  var code = keyCodes[key];
+  return (
+    "_k($event.keyCode," +
+    (JSON.stringify(key)) + "," +
+    (JSON.stringify(code)) + "," +
+    "$event.key)"
+  )
+}
+
+/*  */
+
+function on (el, dir) {
+  if ("development" !== 'production' && dir.modifiers) {
+    warn("v-on without argument does not support modifiers.");
+  }
+  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+}
+
+/*  */
+
+function bind$1 (el, dir) {
+  el.wrapData = function (code) {
+    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+  };
+}
+
+/*  */
+
+var baseDirectives = {
+  on: on,
+  bind: bind$1,
+  cloak: noop
+};
+
+/*  */
+
+var CodegenState = function CodegenState (options) {
+  this.options = options;
+  this.warn = options.warn || baseWarn;
+  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+  this.directives = extend(extend({}, baseDirectives), options.directives);
+  var isReservedTag = options.isReservedTag || no;
+  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
+  this.onceId = 0;
+  this.staticRenderFns = [];
+};
+
+
+
+function generate (
+  ast,
+  options
+) {
+  var state = new CodegenState(options);
+  var code = ast ? genElement(ast, state) : '_c("div")';
+  return {
+    render: ("with(this){return " + code + "}"),
+    staticRenderFns: state.staticRenderFns
+  }
+}
+
+function genElement (el, state) {
+  if (el.staticRoot && !el.staticProcessed) {
+    return genStatic(el, state)
+  } else if (el.once && !el.onceProcessed) {
+    return genOnce(el, state)
+  } else if (el.for && !el.forProcessed) {
+    return genFor(el, state)
+  } else if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.tag === 'template' && !el.slotTarget) {
+    return genChildren(el, state) || 'void 0'
+  } else if (el.tag === 'slot') {
+    return genSlot(el, state)
+  } else {
+    // component or element
+    var code;
+    if (el.component) {
+      code = genComponent(el.component, el, state);
+    } else {
+      var data = el.plain ? undefined : genData$2(el, state);
+
+      var children = el.inlineTemplate ? null : genChildren(el, state, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+    }
+    // module transforms
+    for (var i = 0; i < state.transforms.length; i++) {
+      code = state.transforms[i](el, code);
+    }
+    return code
+  }
+}
+
+// hoist static sub-trees out
+function genStatic (el, state) {
+  el.staticProcessed = true;
+  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+}
+
+// v-once
+function genOnce (el, state) {
+  el.onceProcessed = true;
+  if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.staticInFor) {
+    var key = '';
+    var parent = el.parent;
+    while (parent) {
+      if (parent.for) {
+        key = parent.key;
+        break
+      }
+      parent = parent.parent;
+    }
+    if (!key) {
+      "development" !== 'production' && state.warn(
+        "v-once can only be used inside v-for that is keyed. "
+      );
+      return genElement(el, state)
+    }
+    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+  } else {
+    return genStatic(el, state)
+  }
+}
+
+function genIf (
+  el,
+  state,
+  altGen,
+  altEmpty
+) {
+  el.ifProcessed = true; // avoid recursion
+  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+}
+
+function genIfConditions (
+  conditions,
+  state,
+  altGen,
+  altEmpty
+) {
+  if (!conditions.length) {
+    return altEmpty || '_e()'
+  }
+
+  var condition = conditions.shift();
+  if (condition.exp) {
+    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+  } else {
+    return ("" + (genTernaryExp(condition.block)))
+  }
+
+  // v-if with v-once should generate code like (a)?_m(0):_m(1)
+  function genTernaryExp (el) {
+    return altGen
+      ? altGen(el, state)
+      : el.once
+        ? genOnce(el, state)
+        : genElement(el, state)
+  }
+}
+
+function genFor (
+  el,
+  state,
+  altGen,
+  altHelper
+) {
+  var exp = el.for;
+  var alias = el.alias;
+  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+  if ("development" !== 'production' &&
+    state.maybeComponent(el) &&
+    el.tag !== 'slot' &&
+    el.tag !== 'template' &&
+    !el.key
+  ) {
+    state.warn(
+      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+      "v-for should have explicit keys. " +
+      "See https://vuejs.org/guide/list.html#key for more info.",
+      true /* tip */
+    );
+  }
+
+  el.forProcessed = true; // avoid recursion
+  return (altHelper || '_l') + "((" + exp + ")," +
+    "function(" + alias + iterator1 + iterator2 + "){" +
+      "return " + ((altGen || genElement)(el, state)) +
+    '})'
+}
+
+function genData$2 (el, state) {
+  var data = '{';
+
+  // directives first.
+  // directives may mutate the el's other properties before they are generated.
+  var dirs = genDirectives(el, state);
+  if (dirs) { data += dirs + ','; }
+
+  // key
+  if (el.key) {
+    data += "key:" + (el.key) + ",";
+  }
+  // ref
+  if (el.ref) {
+    data += "ref:" + (el.ref) + ",";
+  }
+  if (el.refInFor) {
+    data += "refInFor:true,";
+  }
+  // pre
+  if (el.pre) {
+    data += "pre:true,";
+  }
+  // record original tag name for components using "is" attribute
+  if (el.component) {
+    data += "tag:\"" + (el.tag) + "\",";
+  }
+  // module data generation functions
+  for (var i = 0; i < state.dataGenFns.length; i++) {
+    data += state.dataGenFns[i](el);
+  }
+  // attributes
+  if (el.attrs) {
+    data += "attrs:{" + (genProps(el.attrs)) + "},";
+  }
+  // DOM props
+  if (el.props) {
+    data += "domProps:{" + (genProps(el.props)) + "},";
+  }
+  // event handlers
+  if (el.events) {
+    data += (genHandlers(el.events, false, state.warn)) + ",";
+  }
+  if (el.nativeEvents) {
+    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
+  }
+  // slot target
+  // only for non-scoped slots
+  if (el.slotTarget && !el.slotScope) {
+    data += "slot:" + (el.slotTarget) + ",";
+  }
+  // scoped slots
+  if (el.scopedSlots) {
+    data += (genScopedSlots(el.scopedSlots, state)) + ",";
+  }
+  // component v-model
+  if (el.model) {
+    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+  }
+  // inline-template
+  if (el.inlineTemplate) {
+    var inlineTemplate = genInlineTemplate(el, state);
+    if (inlineTemplate) {
+      data += inlineTemplate + ",";
+    }
+  }
+  data = data.replace(/,$/, '') + '}';
+  // v-bind data wrap
+  if (el.wrapData) {
+    data = el.wrapData(data);
+  }
+  // v-on data wrap
+  if (el.wrapListeners) {
+    data = el.wrapListeners(data);
+  }
+  return data
+}
+
+function genDirectives (el, state) {
+  var dirs = el.directives;
+  if (!dirs) { return }
+  var res = 'directives:[';
+  var hasRuntime = false;
+  var i, l, dir, needRuntime;
+  for (i = 0, l = dirs.length; i < l; i++) {
+    dir = dirs[i];
+    needRuntime = true;
+    var gen = state.directives[dir.name];
+    if (gen) {
+      // compile-time directive that manipulates AST.
+      // returns true if it also needs a runtime counterpart.
+      needRuntime = !!gen(el, dir, state.warn);
+    }
+    if (needRuntime) {
+      hasRuntime = true;
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+    }
+  }
+  if (hasRuntime) {
+    return res.slice(0, -1) + ']'
+  }
+}
+
+function genInlineTemplate (el, state) {
+  var ast = el.children[0];
+  if ("development" !== 'production' && (
+    el.children.length !== 1 || ast.type !== 1
+  )) {
+    state.warn('Inline-template components must have exactly one child element.');
+  }
+  if (ast.type === 1) {
+    var inlineRenderFns = generate(ast, state.options);
+    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+  }
+}
+
+function genScopedSlots (
+  slots,
+  state
+) {
+  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
+      return genScopedSlot(key, slots[key], state)
+    }).join(',')) + "])")
+}
+
+function genScopedSlot (
+  key,
+  el,
+  state
+) {
+  if (el.for && !el.forProcessed) {
+    return genForScopedSlot(key, el, state)
+  }
+  var fn = "function(" + (String(el.slotScope)) + "){" +
+    "return " + (el.tag === 'template'
+      ? el.if
+        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
+        : genChildren(el, state) || 'undefined'
+      : genElement(el, state)) + "}";
+  return ("{key:" + key + ",fn:" + fn + "}")
+}
+
+function genForScopedSlot (
+  key,
+  el,
+  state
+) {
+  var exp = el.for;
+  var alias = el.alias;
+  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+  el.forProcessed = true; // avoid recursion
+  return "_l((" + exp + ")," +
+    "function(" + alias + iterator1 + iterator2 + "){" +
+      "return " + (genScopedSlot(key, el, state)) +
+    '})'
+}
+
+function genChildren (
+  el,
+  state,
+  checkSkip,
+  altGenElement,
+  altGenNode
+) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+      el$1.for &&
+      el$1.tag !== 'template' &&
+      el$1.tag !== 'slot'
+    ) {
+      return (altGenElement || genElement)(el$1, state)
+    }
+    var normalizationType = checkSkip
+      ? getNormalizationType(children, state.maybeComponent)
+      : 0;
+    var gen = altGenNode || genNode;
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
+  }
+}
+
+// determine the normalization needed for the children array.
+// 0: no normalization needed
+// 1: simple normalization needed (possible 1-level deep nested array)
+// 2: full normalization needed
+function getNormalizationType (
+  children,
+  maybeComponent
+) {
+  var res = 0;
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.type !== 1) {
+      continue
+    }
+    if (needsNormalization(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+      res = 2;
+      break
+    }
+    if (maybeComponent(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+      res = 1;
+    }
+  }
+  return res
+}
+
+function needsNormalization (el) {
+  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+}
+
+function genNode (node, state) {
+  if (node.type === 1) {
+    return genElement(node, state)
+  } if (node.type === 3 && node.isComment) {
+    return genComment(node)
+  } else {
+    return genText(node)
+  }
+}
+
+function genText (text) {
+  return ("_v(" + (text.type === 2
+    ? text.expression // no need for () because already wrapped in _s()
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+}
+
+function genComment (comment) {
+  return ("_e(" + (JSON.stringify(comment.text)) + ")")
+}
+
+function genSlot (el, state) {
+  var slotName = el.slotName || '"default"';
+  var children = genChildren(el, state);
+  var res = "_t(" + slotName + (children ? ("," + children) : '');
+  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
+  var bind$$1 = el.attrsMap['v-bind'];
+  if ((attrs || bind$$1) && !children) {
+    res += ",null";
+  }
+  if (attrs) {
+    res += "," + attrs;
+  }
+  if (bind$$1) {
+    res += (attrs ? '' : ',null') + "," + bind$$1;
+  }
+  return res + ')'
+}
+
+// componentName is el.component, take it as argument to shun flow's pessimistic refinement
+function genComponent (
+  componentName,
+  el,
+  state
+) {
+  var children = el.inlineTemplate ? null : genChildren(el, state, true);
+  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+}
+
+function genProps (props) {
+  var res = '';
+  for (var i = 0; i < props.length; i++) {
+    var prop = props[i];
+    /* istanbul ignore if */
+    {
+      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+    }
+  }
+  return res.slice(0, -1)
+}
+
+// #3895, #4268
+function transformSpecialNewlines (text) {
+  return text
+    .replace(/\u2028/g, '\\u2028')
+    .replace(/\u2029/g, '\\u2029')
+}
+
+/*  */
+
+// these keywords should not appear inside expressions, but operators like
+// typeof, instanceof and in are allowed
+var prohibitedKeywordRE = new RegExp('\\b' + (
+  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+  'super,throw,while,yield,delete,export,import,return,switch,default,' +
+  'extends,finally,continue,debugger,function,arguments'
+).split(',').join('\\b|\\b') + '\\b');
+
+// these unary operators should not be used as property/method names
+var unaryOperatorsRE = new RegExp('\\b' + (
+  'delete,typeof,void'
+).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+// strip strings in expressions
+var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+// detect problematic expressions in a template
+function detectErrors (ast) {
+  var errors = [];
+  if (ast) {
+    checkNode(ast, errors);
+  }
+  return errors
+}
+
+function checkNode (node, errors) {
+  if (node.type === 1) {
+    for (var name in node.attrsMap) {
+      if (dirRE.test(name)) {
+        var value = node.attrsMap[name];
+        if (value) {
+          if (name === 'v-for') {
+            checkFor(node, ("v-for=\"" + value + "\""), errors);
+          } else if (onRE.test(name)) {
+            checkEvent(value, (name + "=\"" + value + "\""), errors);
+          } else {
+            checkExpression(value, (name + "=\"" + value + "\""), errors);
+          }
+        }
+      }
+    }
+    if (node.children) {
+      for (var i = 0; i < node.children.length; i++) {
+        checkNode(node.children[i], errors);
+      }
+    }
+  } else if (node.type === 2) {
+    checkExpression(node.expression, node.text, errors);
+  }
+}
+
+function checkEvent (exp, text, errors) {
+  var stipped = exp.replace(stripStringRE, '');
+  var keywordMatch = stipped.match(unaryOperatorsRE);
+  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
+    errors.push(
+      "avoid using JavaScript unary operator as property name: " +
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
+    );
+  }
+  checkExpression(exp, text, errors);
+}
+
+function checkFor (node, text, errors) {
+  checkExpression(node.for || '', text, errors);
+  checkIdentifier(node.alias, 'v-for alias', text, errors);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+}
+
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident + "=_"));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
+  }
+}
+
+function checkExpression (exp, text, errors) {
+  try {
+    new Function(("return " + exp));
+  } catch (e) {
+    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+    if (keywordMatch) {
+      errors.push(
+        "avoid using JavaScript keyword as property name: " +
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
+      );
+    } else {
+      errors.push(
+        "invalid expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n"
+      );
+    }
+  }
+}
+
+/*  */
+
+function createFunction (code, errors) {
+  try {
+    return new Function(code)
+  } catch (err) {
+    errors.push({ err: err, code: code });
+    return noop
+  }
+}
+
+function createCompileToFunctionFn (compile) {
+  var cache = Object.create(null);
+
+  return function compileToFunctions (
+    template,
+    options,
+    vm
+  ) {
+    options = extend({}, options);
+    var warn$$1 = options.warn || warn;
+    delete options.warn;
+
+    /* istanbul ignore if */
+    {
+      // detect possible CSP restriction
+      try {
+        new Function('return 1');
+      } catch (e) {
+        if (e.toString().match(/unsafe-eval|CSP/)) {
+          warn$$1(
+            'It seems you are using the standalone build of Vue.js in an ' +
+            'environment with Content Security Policy that prohibits unsafe-eval. ' +
+            'The template compiler cannot work in this environment. Consider ' +
+            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+            'templates into render functions.'
+          );
+        }
+      }
+    }
+
+    // check cache
+    var key = options.delimiters
+      ? String(options.delimiters) + template
+      : template;
+    if (cache[key]) {
+      return cache[key]
+    }
+
+    // compile
+    var compiled = compile(template, options);
+
+    // check compilation errors/tips
+    {
+      if (compiled.errors && compiled.errors.length) {
+        warn$$1(
+          "Error compiling template:\n\n" + template + "\n\n" +
+          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+          vm
+        );
+      }
+      if (compiled.tips && compiled.tips.length) {
+        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+      }
+    }
+
+    // turn code into functions
+    var res = {};
+    var fnGenErrors = [];
+    res.render = createFunction(compiled.render, fnGenErrors);
+    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+      return createFunction(code, fnGenErrors)
+    });
+
+    // check function generation errors.
+    // this should only happen if there is a bug in the compiler itself.
+    // mostly for codegen development use
+    /* istanbul ignore if */
+    {
+      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+        warn$$1(
+          "Failed to generate render function:\n\n" +
+          fnGenErrors.map(function (ref) {
+            var err = ref.err;
+            var code = ref.code;
+
+            return ((err.toString()) + " in\n\n" + code + "\n");
+        }).join('\n'),
+          vm
+        );
+      }
+    }
+
+    return (cache[key] = res)
+  }
+}
+
+/*  */
+
+function createCompilerCreator (baseCompile) {
+  return function createCompiler (baseOptions) {
+    function compile (
+      template,
+      options
+    ) {
+      var finalOptions = Object.create(baseOptions);
+      var errors = [];
+      var tips = [];
+      finalOptions.warn = function (msg, tip) {
+        (tip ? tips : errors).push(msg);
+      };
+
+      if (options) {
+        // merge custom modules
+        if (options.modules) {
+          finalOptions.modules =
+            (baseOptions.modules || []).concat(options.modules);
+        }
+        // merge custom directives
+        if (options.directives) {
+          finalOptions.directives = extend(
+            Object.create(baseOptions.directives || null),
+            options.directives
+          );
+        }
+        // copy other options
+        for (var key in options) {
+          if (key !== 'modules' && key !== 'directives') {
+            finalOptions[key] = options[key];
+          }
+        }
+      }
+
+      var compiled = baseCompile(template, finalOptions);
+      {
+        errors.push.apply(errors, detectErrors(compiled.ast));
+      }
+      compiled.errors = errors;
+      compiled.tips = tips;
+      return compiled
+    }
+
+    return {
+      compile: compile,
+      compileToFunctions: createCompileToFunctionFn(compile)
+    }
+  }
+}
+
+/*  */
+
+// `createCompilerCreator` allows creating compilers that use alternative
+// parser/optimizer/codegen, e.g the SSR optimizing compiler.
+// Here we just export a default compiler using the default parts.
+var createCompiler = createCompilerCreator(function baseCompile (
+  template,
+  options
+) {
+  var ast = parse(template.trim(), options);
+  if (options.optimize !== false) {
+    optimize(ast, options);
+  }
+  var code = generate(ast, options);
+  return {
+    ast: ast,
+    render: code.render,
+    staticRenderFns: code.staticRenderFns
+  }
+});
+
+/*  */
+
+var ref$1 = createCompiler(baseOptions);
+var compileToFunctions = ref$1.compileToFunctions;
+
+/*  */
+
+// check whether current browser encodes a char inside attribute values
+var div;
+function getShouldDecode (href) {
+  div = div || document.createElement('div');
+  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+  return div.innerHTML.indexOf('&#10;') > 0
+}
+
+// #3663: IE encodes newlines inside attribute values while other browsers don't
+var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+// #6828: chrome encodes content in a[href]
+var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+/*  */
+
+var idToTemplate = cached(function (id) {
+  var el = query(id);
+  return el && el.innerHTML
+});
+
+var mount = Vue$3.prototype.$mount;
+Vue$3.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && query(el);
+
+  /* istanbul ignore if */
+  if (el === document.body || el === document.documentElement) {
+    "development" !== 'production' && warn(
+      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+    );
+    return this
+  }
+
+  var options = this.$options;
+  // resolve template/el and convert to render function
+  if (!options.render) {
+    var template = options.template;
+    if (template) {
+      if (typeof template === 'string') {
+        if (template.charAt(0) === '#') {
+          template = idToTemplate(template);
+          /* istanbul ignore if */
+          if ("development" !== 'production' && !template) {
+            warn(
+              ("Template element not found or is empty: " + (options.template)),
+              this
+            );
+          }
+        }
+      } else if (template.nodeType) {
+        template = template.innerHTML;
+      } else {
+        {
+          warn('invalid template option:' + template, this);
+        }
+        return this
+      }
+    } else if (el) {
+      template = getOuterHTML(el);
+    }
+    if (template) {
+      /* istanbul ignore if */
+      if ("development" !== 'production' && config.performance && mark) {
+        mark('compile');
+      }
+
+      var ref = compileToFunctions(template, {
+        shouldDecodeNewlines: shouldDecodeNewlines,
+        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+        delimiters: options.delimiters,
+        comments: options.comments
+      }, this);
+      var render = ref.render;
+      var staticRenderFns = ref.staticRenderFns;
+      options.render = render;
+      options.staticRenderFns = staticRenderFns;
+
+      /* istanbul ignore if */
+      if ("development" !== 'production' && config.performance && mark) {
+        mark('compile end');
+        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+      }
+    }
+  }
+  return mount.call(this, el, hydrating)
+};
+
+/**
+ * Get outerHTML of elements, taking care
+ * of SVG elements in IE as well.
+ */
+function getOuterHTML (el) {
+  if (el.outerHTML) {
+    return el.outerHTML
+  } else {
+    var container = document.createElement('div');
+    container.appendChild(el.cloneNode(true));
+    return container.innerHTML
+  }
+}
+
+Vue$3.compile = compileToFunctions;
+
+return Vue$3;
 
 })));
diff --git a/BTCPayServer/wwwroot/js/vue.min.js b/BTCPayServer/wwwroot/js/vue.min.js
new file mode 100644
index 000000000..836793b4c
--- /dev/null
+++ b/BTCPayServer/wwwroot/js/vue.min.js
@@ -0,0 +1,6 @@
+/*!
+ * Vue.js v2.5.13
+ * (c) 2014-2017 Evan You
+ * Released under the MIT License.
+ */
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.Vue=e()}(this,function(){"use strict";function t(t){return void 0===t||null===t}function e(t){return void 0!==t&&null!==t}function n(t){return!0===t}function r(t){return"string"==typeof t||"number"==typeof t||"symbol"==typeof t||"boolean"==typeof t}function i(t){return null!==t&&"object"==typeof t}function o(t){return"[object Object]"===Nn.call(t)}function a(t){var e=parseFloat(String(t));return e>=0&&Math.floor(e)===e&&isFinite(t)}function s(t){return null==t?"":"object"==typeof t?JSON.stringify(t,null,2):String(t)}function c(t){var e=parseFloat(t);return isNaN(e)?t:e}function u(t,e){for(var n=Object.create(null),r=t.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return e?function(t){return n[t.toLowerCase()]}:function(t){return n[t]}}function l(t,e){if(t.length){var n=t.indexOf(e);if(n>-1)return t.splice(n,1)}}function f(t,e){return Mn.call(t,e)}function 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