[wp-meta] [Making WordPress.org] #5818: Theme preview is not working for block themes

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Wed Sep 8 03:49:16 UTC 2021

#5818: Theme preview is not working for block themes
 Reporter:  kafleg           |       Owner:  (none)
     Type:  defect           |      Status:  closed
 Priority:  high             |   Milestone:
Component:  Theme Directory  |  Resolution:  fixed
 Keywords:  needs-patch      |

Comment (by dd32):

 Replying to [comment:4 oandregal]:
 > :wave: I was working on a similar issue that affected the customizer and
 themes that use the global stylesheet generated by theme.json. For
 reference, this is the issue
 https://github.com/WordPress/gutenberg/issues/34531 It turns out there was
 a cache issue that I'm fixing at

 Hey @oandregal!

 The theme previewer doesn't call any of those such filters, as it simply
 loads WordPress with a different defined stylesheet/template option.

 Logic to call that function prior to rendering the page can be added
 though. Preferably however, Gutenberg should be caching the styles in a
 manner that is keyed by the theme being displayed.

 Without looking closely right now, something else we do is use
 `pre_option_*` filters to prevent some database-set options from being
 respected - We could do something similar here and simply prevent the
 cache option ever being set/read to force it to re-create it on every

Ticket URL: <https://meta.trac.wordpress.org/ticket/5818#comment:5>
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