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32 lines
1.0 KiB
Markdown
32 lines
1.0 KiB
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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For example result of it:
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<iframe width="100%" height="350" src="//jsfiddle.net/agaust/3qz105nn/embedded/html,result/dark/" allowfullscreen="allowfullscreen" frameborder="0"></iframe>
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tutorial above, when you can not directly add the attribute inside html tag.
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but if you can add it, you can following this tutorial bellow:
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{% highlight html %}
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<input id="id_price" type="number" min=0 onkeypress="return isNumber(event)"/>
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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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</script>
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{% endhighlight %}
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**Refference:** [http://stackoverflow.com/a/7295864](http://stackoverflow.com/a/7295864)
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hope it usefull. |