[wp-trac] [WordPress Trac] #45418: Admin notices lose custom id and class attributes in Gutenberg editor

[WordPress Trac]

#45418: Admin notices lose custom id and class attributes in Gutenberg editor
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 Reporter:  ianmjones     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  5.0
 Severity:  normal        |   Keywords:
  Focuses:                |
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 If a plugin creates a custom notice for display in the admin it usually
 includes an `id` and/or `class` attributes in the `div` that can be used
 to identify actions on it, such as dismiss.

 In the Gutenberg editor admin notices are being displayed with new styling
 and class attributes different to when displayed in the rest of the
 WordPress admin dashboard and seem to have the `id` and custom `class`
 attributes stripped.

 This makes it impossible for a plugin to identify its own notices and
 attach JavaScript handlers for the dismiss button and therefore properly
 register that the admin notice is no longer to be displayed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/45418>
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