[wp-trac] [WordPress Trac] #52302: Emoji detection not working in the latest Chrome on Windows 7

[WordPress Trac]

#52302: Emoji detection not working in the latest Chrome on Windows 7
----------------------------+-----------------------------
 Reporter:  SergeyBiryukov  |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Emoji           |    Version:  5.5
 Severity:  normal          |   Keywords:  has-screenshots
  Focuses:                  |
----------------------------+-----------------------------
 Reported by @Webliberty on Russian WP Slack.

 1. Create a post with this content: `:) ;)`.
 2. View the post in the latest Chrome (version 87.0.4280.141 as of
 writing) on Windows 7.
 3. Instead of regular colored images, you'll see one blank square and one
 monochrome icon.

 If the platform does not support the current emoji set natively, the
 Twemoji fallback is supposed to replace it with images, but does not kick
 in as expected.

 Some history here:
 * [46665] / #48293 updated Twemoji to 12.1.3 for WordPress 5.3.
 * [48048] / #50148 updated Twemoji to 13.0.0 for WordPress 5.5.
 * [49239] / #51356 updated Twemoji to 13.0.1 for WordPress 5.6.

 Upon some testing, this used to work in WordPress 5.4 and no longer works
 in WordPress 5.5, so appears to be a regression in [48048].

 Reverting the changes to `js/_enqueues/lib/emoji-loader.js` from [48048],
 as well as the corresponding
 [https://build.trac.wordpress.org/browser/tags/5.6/wp-
 includes/formatting.php?marks=5740#L5726 minified fragment] in
 `_print_emoji_detection_script()` to
 [https://build.trac.wordpress.org/browser/tags/5.4/wp-
 includes/formatting.php?marks=5701#L5686 the one from WordPress 5.4] makes
 the images display again.

 Since extended support for Windows 7 [https://support.microsoft.com/en-
 us/windows/windows-7-support-ended-on-january-14-2020-b75d4580-2cc7-895a-
 2c9c-1466d9a53962 has ended a year ago on January 14, 2020], this may very
 well be an edge case. This ticket was created for reference just in case
 it might still be worth fixing.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/52302>
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