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Asked: 2026-05-13T16:45:23+00:00

I have seen quite a lot of websites doing this (even stackoverflow itself) within

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I have seen quite a lot of websites doing this (even stackoverflow itself) within their generated HTML source, accessing a specific version of a CSS or JavaScript file with GET parameters. What’s the point of it?

Example:

<link rel="stylesheet" href="http://sstatic.net/so/all.css?v=6230">
<script type="text/javascript" 
        src="http://sstatic.net/so/js/master.js?v=6180"></script>

Is it simply a manner of coherence or best practice? Is it simply so that clients with old cached versions on their browsers are forced to update their outdated version?

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1 Answer

  1. Editorial Team

    Is it simply so that clients with old cached versions on their browsers are forced to update their outdated version?

    Exactly.

    Check out this question for details, further links and discussion and this question on how Stack Overflow itself employs the method.

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