Title: Outdated APIs
Last modified: September 7, 2023

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# Outdated APIs

 *  Resolved [lilcode](https://wordpress.org/support/users/lilcode/)
 * (@lilcode)
 * [2 years, 6 months ago](https://wordpress.org/support/topic/outdated-apis/)
 * Recently when checking my site in [https://pagespeed.web.dev/](https://pagespeed.web.dev/)
   noticed an unpleasant error:
 * _The page uses outdated APIs 1 warning detected
   The deprecated API will be removed
   from the browser in the future. DOM Mutation Events, including `DOMSubtreeModified`,`
   DOMNodeInserted`, `DOMNodeRemoved`, `DOMNodeRemovedFromDocument`, `DOMNodeInsertedIntoDocument`,
   and `DOMCharacterDataModified` are deprecated ([https://w3ce-git](https://w3ce-git))
   and will be removed. Please use `MutationObserver` instead.
 * Еhis error is caused by your plugin, if i update the plugin versions to the latest
   version will the error go away?
 * Current versions:
 * Fastest Cache – 1.1.4
 * Premium 1.6.0 

Viewing 1 replies (of 1 total)

 *  Plugin Author [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * (@emrevona)
 * [2 years, 6 months ago](https://wordpress.org/support/topic/outdated-apis/#post-17034237)
 * To create threads about the premium version on wordpress.org forum is forbidden
   so please contact us via email about the problem which is related to the premium
   version.
 * [https://www.wpfastestcache.com/contact-us/](https://www.wpfastestcache.com/contact-us/)

Viewing 1 replies (of 1 total)

The topic ‘Outdated APIs’ is closed to new replies.

 * ![](https://ps.w.org/wp-fastest-cache/assets/icon-256x256.png?rev=2064586)
 * [WP Fastest Cache - WordPress Cache Plugin](https://wordpress.org/plugins/wp-fastest-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-fastest-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-fastest-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-fastest-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-fastest-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-fastest-cache/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Emre Vona](https://wordpress.org/support/users/emrevona/)
 * Last activity: [2 years, 6 months ago](https://wordpress.org/support/topic/outdated-apis/#post-17034237)
 * Status: resolved