• Part of Block API #41236.

In the previous iteration for WordPress 6.8, the focus was on addressing the limitations in the region-based client-side navigation and improving the full-page client-side navigation experiment, as well as finishing interactive features for the Gallery, Query, and Search blocks. Not all the work could be carried out that time, though.

Now, for WordPress 6.9, we are resuming part of this work, specifically the client-side navigation feature, as it requires some tweaks after being reimplemented in #70353 to support styles and script modules from newly visited pages.

Additionally, other issues have been identified regarding the iAPI runtime initialization that also need to be tackled.

As always, the task list is live and can be modified or expanded at any time. 🙂

Fixes

• iAPI: Items from data-wp-each doesn't work when exposed from state getters #70866
• Interactivity API shows incorrect deprecation warning in 6.8 when Gutenberg plugin not active #69975
• iAPI: Migrate data-wp-on-async to data-wp-on with withSyncEvent() #72413

Async store loading

• iAPI router: Synchronous getter execution prevents state access when store is initialized after hydration #70874
• iAPI router: Support lazy loaded derived state #70872

New client-side navigation algorithm

• iAPI Router: Styles inside noscript tags are wrongly applied on client-side navigation #70876
• iAPI Router: Support router regions nested inside data-wp-interactive elements #71519
  • Follow-up: don't require regions to also have data-wp-interactive
• Query Loop: Allow Post Content block with the "force page reload" setting disabled #70871
• iAPI Router: Only load modules of interactive blocks on client-side navigation #70873
• iAPI: getServerState/Context doesn't handle all client-server state synchronization scenarios during navigation #72345
• iAPI router: Move internal properties to a private store #70879

Docs

• Docs: Interactivity API - Create a Core Concepts section for the iAPI #62921
  •  Namespaces and scopes
  • Client-side navigation

Deprecations/improvements

• iAPI: Deprecate data-wp-ignore #70881
• iAPI: Add official support for unique IDs #70880
• Interactivity API: Performance bottleneck in data_wp_each_processor due to repeated template parsing wordpress-develop#10249

Blocks

• Gallery: Add lightbox support #62906
• Query and Search blocks: support for Instant Search via query_loop_block_query_vars filter #67181