[wp-trac] [WordPress Trac] #57322: Twenty Twenty-Three: Gradients clear upon saving when KSES filters are active

[WordPress Trac]

#57322: Twenty Twenty-Three: Gradients clear upon saving when KSES filters are
active
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 Reporter:  mmtr86         |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Bundled Theme  |     Version:
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:
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Comment (by david.binda):

 My reading of the regex is that it's meant to match just a single non-
 stacked gradient. The failing Gutenberg produced CSS rule uses a stacked
 gradient, and also references a CSS variable, which is another bit which
 throws the regex off.

 Looking into the issue, I have prepared a patch which moves the CSS
 variables handling inside the `safecss_filter_attr` function prior the
 grandients handling, and which makes the regex to match stacked gradients
 as well.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57322#comment:1>
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