Drupal 8 Changes

Normalizers/Denormalizers should implement ::getSupportedTypes() instead of ::hasCacheableSupportsMethod() ift.tt/vaAFNZ7

Twig debugging / caching settings added to administrative user interface ift.tt/terpd1k

New data-drupal-ajax-container attribute ift.tt/XzHeIDi

getSchemaUpdates() is deprecated ift.tt/8YLjxEv

New Drupal core branching scheme introduced ift.tt/4sbatlJ

Core JavaScript development now requires Node.js 18 ift.tt/vPD1QIE

Clear Caches button is now separate from the performance form ift.tt/EpUl6iV

Static version of random generator added for PHPUnit 10 compatibility ift.tt/B6xQU3F

The CKEditor Code Block plugin is now configurable ift.tt/nlVmxfX

PostCSS output is formatted with Prettier ift.tt/Eze8mWS

Initial revisions created in a workspace are now tracked by that workspace ift.tt/XsLOq65

The Toolbar loading process adds adds inline JavaScript and CSS ift.tt/NqpCTty

watchdog_exception() deprecated ift.tt/bVIwag7

Deprecate node_get_recent() ift.tt/BJ9eODG

"Announcements" experimental module ift.tt/oVHJKzy

New transaction isolation level default for new sites for MySQL, MariaDB or equivalent databases ift.tt/9NaUymx

Operations link for MenuLinkContent entity are moved along with entity list builder ift.tt/kVym6j2

New AJAX TabledragWarningCommand for adding unsaved changes warnings to tabledrag ift.tt/GAZd5EJ

New Twig |add_class and |set_attribute filters for adding CSS classes and setting HTML attributes ift.tt/G1ascOE

Single Directory Components (SDC) added as new experimental module ift.tt/f0FvSCd