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28 lines
836 B
Markdown
28 lines
836 B
Markdown
---
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layout: post
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title: "Javascript Validator for Input Number"
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date: 2016-04-26 04:19:22 +0700
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categories: [others]
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---
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This javascript will validate/allow the number only when event key is pressed.
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{% highlight html %}
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<input id="id_price" type="number" min=0 />
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<script type="text/javascript">
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function isNumber(evt) {
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evt = (evt) ? evt : window.event;
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var charCode = (evt.which) ? evt.which : evt.keyCode;
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if (charCode > 31 && (charCode < 48 || charCode > 57)) {
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return false;
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}
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return true;
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}
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document.getElementById('id_price').setAttribute("onkeypress", "return isNumber(event)");
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</script>
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{% endhighlight %}
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For example result of it:
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<iframe width="100%" height="300" src="//jsfiddle.net/agaust/3qz105nn/embedded/html,result/dark/" allowfullscreen="allowfullscreen" frameborder="0"></iframe> |