jQuery onchange event fires twice in IE8
I have the following code:
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
$(document).ready(function()
{
$('#test').bind("change", function()
{
alert(this.value);
this.value = jQuery.trim(this.value);
});
});
</script>
<input type="text" id="test" />
<br /开发者_JAVA技巧>
<input type="radio" />
</body>
</html>
In IE8 if i enter any text to "test" input and press "Tab" I'll get alert message twice.
But if I comment line "this.value = jQuery.trim(this.value);" the message will be shown only once.
Why this happened? And how I can avoid twice "onchange" handler invoking?
The Issue has been reported in jQuery and it has been fixed with the latest code base. That was reported on jQuery 1.4 - 1.6.4.
When you set the value property of a form element to a different value, the change event fires.
So, in your code:
$('#test').change(function() {
// This is executed whenever the `change` event fires
// Setting a new value will trigger the `change` event again
this.value = $.trim(this.value);
});
By the way, you probably want to use the input event instead of change. There’s a jQuery plugin for that: https://github.com/mathiasbynens/jquery.oninput.js
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