I am using jQuery to dynamically add a script to my page and it works, but jQuery appends "_=TIMESTAMP" to the URL causing the browser to never use the cache. With the following code:
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
</head>
<body>
<script type="text/javascript">
$("head").append('<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.15/jquery-ui.min.js"></scr' + 'ipt>');
</script>
</body>
</html>
I can see in firebug that the URL requested is:
https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.15/jquery-ui.min.js?_=1313291978667
Does anyone know how to tell jQuery not to do this?
Thanks
To answer your original question, you see the timestamp appended because jQuery by default sets cache: false
for script
and jsonp
calls which appends the timestamp to the URL.
To avoid the timestamp, you can do this:
$.ajaxPrefilter(function( options, originalOptions, jqXHR ) {
if ( options.dataType == 'script' || originalOptions.dataType == 'script' ) {
options.cache = true;
}
});
This sets up a global prefilter for all $.ajax
calls, including the ones made by jQuery while requesting the script
.
We inspect the dataType
to make sure we're not inadvertantly targetting other ajax calls and explicitly set cache
to true
. This will avoid the timestamp appending problem.
You can now use your original code and it'll pick it up from cache.
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