jQuery Updater is a WordPress plugin designed to facilitate the update of jQuery to the latest official stable version, which may not be included in the latest stable release of WordPress. This plugin also incorporates jQuery Migrate to ensure backwards compatibility, allowing older scripts to function correctly with the new version. Importantly, the plugin does not replace any files, meaning that deactivating it will restore the site to its original state without any permanent changes.

While WordPress 5.6 generally includes an updated version of jQuery 3, the jQuery Updater provides additional functionality for users who need specific versions or features. It features an options screen to enable or disable the plugin, the ability to select a specific jQuery version, and automatic cache flushing. However, it is recommended for users familiar with beta testing and JavaScript, as assistance is limited to plugin-related issues.