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Do you know why the root gap support regressed? Seems like it's important to fix that (to avoid WP 6.0 regression)

Do you know why the root gap support regressed? Seems like it's important to fix that (to avoid WP 6.0 regression)

We only noticed it recently, but think it was after this PR was merged:

• Avoid using CSS variables for block gap styles #37360

Specifically, this line:

'spacing' => array(
     ....
    'blockGap' => 'top', // <- this will be skipped when adding to `$schema['styles']['blocks']` 
),

There's a comment in sanitize() too:

// Some styles are only meant to be available at the top-level (e.g.: blockGap),
// hence, the schema for blocks & elements should not have them.

The current thinking is that we do something in layout to get around this.

Documented in:

• Layout blockGap / spacing: Add support for gap set at the block level in theme.json and global styles #39789

I think maybe we should merge this one for now, just in case we run into any blockers in the follow up:

• Theme JSON: use block global style for block gap where no gap value exists in layout.php #39870