Continuation of #18479

Front-end

CSS

• body theme classes are now theme--highcontrast, theme--dark and/or theme--light

JavaScript

• jQuery update to v2.2 Bump jQuery to v2.2 #20949
  • ⚠️ 💥 Do not use $(document).ready(function() {}) to init your scripts, please move to DOMContentLoaded (Use DOMContentLoaded and fix sharebymail loading issue #21921)
• OCA.Search is now unsupported. Please implement your own inner app search or use our official Unified Search API Enh/unified search #21971 Add unified search API #20916

Deprecated global variables

Backend

Removed from public namespace:

• Remove old deprecated getAppFolder from IServerContainer Remove old deprecated getAppFolder #21714
• Removed old hook OCA\DAV\Connector\Sabre::authInit - there is a typed event available: OCA\DAV\Events\SabrePluginAuthInitEvent Move federated_share_added into a typed event #21814

Removed from private namespace:

• OC_Mount_Config in files_external was renamed to OCA\Files_External\MountConfig Move OC_Mount_Config to proper classname and remove OC::$CLASSPATH us… #21785

Deprecations

• \OCP\IServerContainer::getEventDispatcher Deprecate \OCP\IServerContainer::getEventDispatcher #21322
• do not use appinfo/app.php anymore but try to use the IBootstrap interface for the Application to lazy load as much as possible: Do not load app.php if Application implements IBootstrap #21812
• OC_App::registerLogIn() is deprecated, please register your alternative login option using the registerAlternativeLogin() on the RegistrationContext in your Application class implementing the OCP\Authentication\IAlternativeLogin interface Allow to register AlternativeLogin on RegistrationContext #21850
• OCP\ILogger Deprecate ILogger in favor of the PSR-3 logger #21875 (example is included there)

Deprecations of Events & Hooks

• typed event OCP\Group\Events\BeforeUserRemovedEvent - it can't be guaranteed that this event is triggered in all case (e.g. for LDAP users this isn't possible) - if there is a valid use case please comment here Migrate OC_Group post_removeFromGroup hook to actual event object #21738

Behavorial changes