How can I force clients to refresh JavaScript files?

Question

We are currently working in a private beta and so are still in the process of making fairly rapid changes, although obviously as usage is starting to ramp up, we will be slo

Answer 1

The advantage of using a file.js?V=1 over a fileV1.js is that you do not need to store multiple versions of the JavaScript files on the server.

The trouble I see with file.js?V=1 is that you may have dependant code in another JavaScript file that breaks when using the new version of the library utilities.

For the sake of backwards compatibility, I think it is much better to use jQuery.1.3.js for your new pages and let existing pages use jQuery.1.1.js, until you are ready to upgrade the older pages, if necessary.