[wp-trac] [WordPress Trac] #53006: Blocks: Add isDefault to server side block styles registry

[WordPress Trac]

#53006: Blocks: Add isDefault to server side block styles registry
-------------------------+--------------------
 Reporter:  gziolo       |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  5.8
Component:  General      |    Version:  trunk
 Severity:  normal       |   Keywords:
  Focuses:               |
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 Moved from GitHub (https://github.com/WordPress/gutenberg/issues/30356).

 ## What problem does this address?
 [As documented
 here](https://github.com/WordPress/gutenberg/blob/trunk/docs/reference-
 guides/filters/block-filters.md#block-style-variations), block styles can
 be registered both server side (using PHP method `register_block_style`)
 and client side (using `wp.blocks.registerBlockStyle`).

 While server-side registration is a convenient method to easily register
 new block styles, it lacks the ability to register a style as the default
 one.

 As an example, something that could easily be achieved like this in JS, is
 not doable in PHP

 {{{
 wp.blocks.registerBlockStyle( 'core/heading', [
         {
                 name: 'default',
                 label: 'Default',
                 isDefault: true,
         },
         {
                 name: 'alt',
                 label: 'Alternate',
         }
 ]);
 }}}

 ## What is your proposed solution?

 Extend `register_block_style` to also accept `isDefault`.
 (it would probably require to change core code in
 https://github.com/WordPress/WordPress/blob/59d32bfe24cee58554ac82573d8a69dd6b6749ab
 /wp-includes/script-loader.php#L2311 )

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/53006>
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