[wp-trac] [WordPress Trac] #44471: Theme Editor: Modern CSS is marked as errors by CodeMirror

[WordPress Trac]

#44471: Theme Editor: Modern CSS is marked as errors by CodeMirror
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 Reporter:  ThemeZee      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  4.9.6
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I got some reports from users of my newest theme Donovan saying the
 style.css is broken.

 The reason is that the code editor on Appearance > Theme Editor does not
 know modern CSS.

 The CodeMirror plugin does not recognize CSS variables, new properties
 like grid-gap or the new fr units (fractions for CSS grids).

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Ticket URL: <https://core.trac.wordpress.org/ticket/44471>
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