[wp-trac] [WordPress Trac] #50668: jquery-migrate.js in latest beta version 5.5 gone?

[WordPress Trac]

#50668: jquery-migrate.js in latest beta version 5.5 gone?
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 Reporter:  BackuPs             |       Owner:  (none)
     Type:  defect (bug)        |      Status:  new
 Priority:  normal              |   Milestone:  Awaiting Review
Component:  External Libraries  |     Version:  trunk
 Severity:  normal              |  Resolution:
 Keywords:                      |     Focuses:
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Comment (by SergeyBiryukov):

 From the official [https://jquery.com/upgrade-guide/3.0/#jquery-migrate-
 plugin jQuery Upgrade Guide]:
 > [https://github.com/jquery/jquery-migrate/#README Version 3.0 of the
 jQuery Migrate Plugin] ''does not'' warn about or restore behaviors that
 were removed in previous major version changes such as jQuery 1.9/2.0. Use
 the following steps to upgrade from a version of jQuery older than 1.11.0
 or 2.1.0 to this new version 3.0:
 >
 > 1. Upgrade the version of jQuery on the page to the latest 1.x or 2.x
 version.
 > 2. Add the uncompressed [https://github.com/jquery/jquery-
 migrate/tree/1.x-stable/#README jQuery Migrate 1.x Plugin] to the page.
 > 3. Optional but recommended, update any plugins in use since later
 versions are usually the most compatible with recent versions of jQuery.
 > 4. Test the page and resolve any warnings that appear on the console,
 using the [https://github.com/jquery/jquery-
 migrate/tree/1.x-stable/warnings.md JQMIGRATE 1.x warning documentation]
 as a guide.
 > 5. Remove the jQuery Migrate 1.x plugin and ensure that the updated
 jQuery code on the page continues to work properly with only the latest
 jQuery 1.x/2.x in use.
 > 6. Upgrade the version of jQuery on the page to the latest 3.x version
 and add the uncompressed [https://github.com/jquery/jquery-migrate/#README
 jQuery Migrate 3.x plugin] to the page.
 > 7. Test the page and resolve any warnings that appear on the console,
 using the [https://github.com/jquery/jquery-
 migrate/blob/master/warnings.md JQMIGRATE 3.x warning documentation] as a
 guide. Report any bugs in third-party plugins to the plugin author.
 > 8. Remove the jQuery Migrate 3.x plugin and ensure that the page
 continues to work properly with only the latest jQuery 3.x in use.

 * Steps 1 to 3 are what's currently in core.
 * Steps 4 and 5 are what's being done in WordPress 5.5. It's now up to
 plugin and theme developers to update their code to longer require jQuery
 Migrate 1.x.
 * Steps 6 and 7 are planned for WordPress 5.6.
 * Steps 8 is planned for WordPress 5.7 or later.

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Ticket URL: <https://core.trac.wordpress.org/ticket/50668#comment:3>
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