[wp-trac] [WordPress Trac] #64150: Late-printed styles are not hoisted to HEAD if wp-block-library is not enqueued

[WordPress Trac]

#64150: Late-printed styles are not hoisted to HEAD if wp-block-library is not
enqueued
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 Reporter:  westonruter               |       Owner:  westonruter
     Type:  defect (bug)              |      Status:  closed
 Priority:  normal                    |   Milestone:  6.9
Component:  Script Loader             |     Version:  trunk
 Severity:  normal                    |  Resolution:  fixed
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by westonruter):

 There's a complication to using `current_theme_supports( 'wp-block-styles'
 )` as the signal for whether opt-in to loading separate block styles on
 demand. It doesn't work with Twenty Twenty, which is the only bundled
 theme which doesn't add this theme support.

 We need to decouple `wp-block-styles` theme support from whether
 `should_load_separate_core_block_assets` and
 `should_load_block_assets_on_demand` are enabled. Enabling the latter
 should not cause any styles to be printed.

 More: https://core.trac.wordpress.org/ticket/64166#comment:2

 cc @Soean

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Ticket URL: <https://core.trac.wordpress.org/ticket/64150#comment:18>
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