: How to indicate to browser that javascript (external) has been changed The advantage of including js on web page is that I need not to worry about cached js file. If I change it on the server,

@Goswami781

<script>

var ts = new Date().valueOf();//creating timestamp
var newScript = document.createElement('script'); //creating script tag
newScript.type = 'text/javascript';
newScript.src = 'jquery-1.3.2.min.js?'+ts;// reference to jS with timestamp as a query string
document.body.appendChild(newScript);//appending it to dom
</script>


Add this script tag to body. Every time JS will be updated a fresh file.

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@Sarah324

This is what version numbers are good for. If you include your file with a version number in the file name (like jquery-1-5-1.min.js), then later when a new version of the file is deployed you update with the new version number (like jquery-1-6-0.min.js), then you don't have to worry about the caching.

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@Michele947

Use a made up query string attached to the end of the file name. Browsers think the file is new and download it. The query string does not affect the file.

So <script type="text/javascript" src="your.js?123"></script>

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