WordPress 6.8 Compatibility

[jeherve]

WordPress 6.8 is set to release on TBD.

• Planning: make.wordpress.org/core/6-8

Let's use this issue to keep track of anything that may come up until then.

Tasks

Beta Give feedback

1. Update our tested up to.
2. Audit blocks for writing and contentOnly modes #40040
   Epic [Focus] Blocks [Plugin] Jetpack [Pri] Normal [Type] Janitorial +5

And *in the next plugin release , to give folks time to update:

Tasks

Beta Give feedback

1. General: update WP version requirements to WordPress 6.7
2. General: remove backwards-compatible code for versions < 6.7

Once WordPress 6.7 is the minimum required version in Jetpack, we can consider implementing the following changes:

Tasks

Beta Give feedback

1. Use the new block type registration APIs with wp_register_block_metadata_collection() #39921
   [Focus] Blocks [Focus] Performance [Pri] Normal [Type] Enhancement +4
   
2. Blocks: use new useResizeObserver hook in @wordpress/compose #39922
   [Focus] Blocks [Pri] Normal [Type] Janitorial +3
3. Repeat Visitor Block: use stabilized role attribute property #39924
   [Block] Repeat Visitor [Plugin] Jetpack [Pri] Low [Type] Janitorial +4
4. Subscriptions: use new plugin template registration API for subscription templates #39853
   [Block] Subscriptions [Feature] Subscriptions [Type] Enhancement +3
   

In addition to the above, we can follow the dev-notes that will drop here about the release:
make.wordpress.org/core/tag/dev-notes+6-8

We can also follow the source of truth: *TBD

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For reference: prior art for WordPress 6.7 compat: #38902