[wp-trac] [WordPress Trac] #52098: Twenty Twenty-One: IE specific polyfills are loaded in all browsers

[WordPress Trac]

#52098: Twenty Twenty-One: IE specific polyfills are loaded in all browsers
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 Reporter:  ismail.elkorchi  |       Owner:  (none)
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Bundled Theme    |     Version:  5.6
 Severity:  normal           |  Resolution:
 Keywords:  needs-patch      |     Focuses:  javascript, performance
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Changes (by peterwilsoncc):

 * keywords:   => needs-patch
 * version:  trunk => 5.6


Comment:

 Thanks for the report @ismailelkorchi

 I think you're correct, ideally the polyfill would be included for IE11
 only but I'll leave the 2021 team to decide whether to milestone this
 ticket as it may have been discussed earlier.

 Unfortunately the `$is_IE` variable is unreliable for sites with full page
 caching but the `wp_get_script_polyfill()` function can be used when
 enqueuing the script similar to how WordPress uses it in the dashboard for
 `wp-polyfills`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52098#comment:1>
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