[wp-trac] [WordPress Trac] #60876: Autoprefixer warning in `src/wp-admin/css/media.css` when running `precommit:css` Grunt task

[WordPress Trac]

#60876: Autoprefixer warning in `src/wp-admin/css/media.css` when running
`precommit:css` Grunt task
----------------------------+----------------------------------------
 Reporter:  davidbaumwald   |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  6.5.1
Component:  Administration  |    Version:  trunk
 Severity:  minor           |   Keywords:  needs-patch good-first-bug
  Focuses:  css             |
----------------------------+----------------------------------------
 Similar to #59819, during the Dry Run for the 6.5 release, the following
 warning was output while running the `npm run grunt prerelease` task:
 {{{
 >> autoprefixer: F:\WordPress Core
 Develop\develop.svn.wordpress.org\branches\6.5\src\wp-
 admin\css\media.css:1127:2: start value has mixed support, consider using
 flex-start instead
 }}}

 Copying from #59819:

 The start and end values are not supported in Opera Mobile which has a
 usage of 1.01%.
 On WordPress' Browsers Support page:
 Last 2 Opera versions.

 Browsers with > 1% usage based on can I use browser usage
 table.[https://caniuse.com/usage-table Opera Mobile's last 2 versions have
 a usage of}:
 73: 1.01%
 12.1: 0%

 Noting: Flexbox is well supported on all browser versions that WordPress
 supports ✅

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/60876>
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