Title: Resource change detection – client caching
Last modified: February 5, 2018

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# Resource change detection – client caching

 *  Resolved [kostacitytech](https://wordpress.org/support/users/kostacitytech/)
 * (@kostacitytech)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/resource-change-detection-client-caching/)
 * Hi,
 * I have a quick question about the actual client browser caching. Does the plugin
   change the URL of the combined minified JS or CSS file on individual file changes,
   i.e. does it automatically detect when a JS file is changed?
 * For instance, this URL
 * /cache/autoptimize/1/js/autoptimize_63c31755eb1b85eee1369958d5b04188.js
 * If we change one of the JS files in the batch, will the plugin be smart enough
   to automatically change the URL fingerprint so the client browser can fetch it*
   without* changing this parameter: [https://www.screencast.com/t/2tTA36n7es](https://www.screencast.com/t/2tTA36n7es)?
 * Kind Regards

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/resource-change-detection-client-caching/#post-9938180)
 * yes 🙂
 * (as in; “yes it is smart enough to automatically detect changes in original code
   and will change the hash in the filename automatically”, more info in [http://blog.futtta.be/2016/11/09/so-how-does-autoptimize-work-anyway/](http://blog.futtta.be/2016/11/09/so-how-does-autoptimize-work-anyway/).
   this -obviously- only works for pages that are not in your page cache (yet))
 * hope this clarifies,
    frank
 *  Thread Starter [kostacitytech](https://wordpress.org/support/users/kostacitytech/)
 * (@kostacitytech)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/resource-change-detection-client-caching/#post-9938837)
 * Thank you 🙂

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Resource change detection – client caching’ is closed to new replies.

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## Tags

 * [caching](https://wordpress.org/support/topic-tag/caching/)

 * 2 replies
 * 2 participants
 * Last reply from: [kostacitytech](https://wordpress.org/support/users/kostacitytech/)
 * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/resource-change-detection-client-caching/#post-9938837)
 * Status: resolved