• Part of Block API #41236.

We completed everything for the first public release of the Interactivity API in WordPress 6.5. Now, during the next iteration―which is going to be shorter―, we aim to focus on improving the current API without releasing new features. This includes enhancing the developer experience (especially during debugging), better test coverage and code quality, as well as fixing any reported bugs.

Note that the list is expected to be modified. I've also added optional tasks we can work on if we find the time.

28-05 Update: All tasks have been redistributed for 6.6 release summary.

Punted to future releases

• Interactivity Router: Support Handling navigate() Failure States #59856
• Interactivity API: Allow async directive registration #60670
• Interactivity API: Defer hydration until node is scrolled near the viewport #58284

Won't do

• Interactivity API: Debug - Show directive names included in each Directives component on Preact’s debug tools #60049
• Interactivity API: Added comments for directive parsing #61456

Ready for 6.6

Enhancements

• Interactivity API: Include preact/debug when SCRIPT_DEBUG is enabled #60514
• Introduce wp-on-async directive as performant alternative over synchronous wp-on directive #61885
• Update the query block to permit non-core interactive blocks #60006
• Add Interactivity API hooks to wp_admin wordpress-develop#6453
• KSES: Allow leading trailing double hyphen in data attributes wordpress-develop#6598
• Interactivity API: Add debug notices for SSR wordpress-develop#6413
• Interactivity API: Add server derived state getter handling wordpress-develop#6394

Bug fixes

• Interactivity: Return useMemo and useCallback hooks #60474
• Interactivity API: Allow multiple event handlers for the same type with data-wp-on. #60661
• Interactivity API: Allow multiple event handlers for the same type with data-wp-on-document and data-wp-on-window. #61009
• Interactivity API: Prevent wrong written directives from killing the runtime #61249
• Interactivity API: Prevent empty namespace or different namespaces from killing the runtime #61409
• Interactivity API bug: Fix fatal error when trying to use a stdClass as state-context. wordpress-develop#6672
• Interactivity API: Increase directive wp-each-child priority. #62293

Code Quality

• Interactivity API: Turn named capturing groups back into numbered ones inside toVdom #61728
• Interactivity API: Move all utils inside utils.ts #61721
• Interactivity API refactor to TypeScript (utils & kebabToCamelCase) #60149
• Interactivity: Strict type checking #59865
• Interactivity API: Add types for warn helper. #61687
• Interactivity API : Refactor interactivity-router to TS #61730
• Editor: Move Interactivity directives processing to WP_Block class wordpress-develop#6331