[wp-trac] [WordPress Trac] #37110: Update to jQuery 3.*

[WordPress Trac]

#37110: Update to jQuery 3.*
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 Reporter:  jorbin                               |       Owner:  (none)
     Type:  task (blessed)                       |      Status:  reopened
 Priority:  normal                               |   Milestone:  5.5
Component:  External Libraries                   |     Version:
 Severity:  critical                             |  Resolution:
 Keywords:  early has-patch needs-testing        |     Focuses:  javascript
  needs-screenshots has-dev-note                 |
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Comment (by apedog):

 The solutions posted above still treat this like it's a plugin-territory
 problem. When it's the entire wp-core admin-side breaking. These plugins
 will break wp-core's {{{common.js}}} functionality.

 Even if most offending plugins will promptly fix this, not everyone has
 automatic updates set on their site/plugins. And I'm not sure how many
 will opt-in after 5.5 will have introduced this break.

 I've no idea about the amount of work needed to create a wp version of
 {{{jquery-migrate}}} that logs {{{_doing_it_wrong}}} messages to console.
 But I know installations will break. Not everyone can do the whole Health
 Check & Troubleshooting process and find the offending plugin. They'll
 just know their site broke when updating to 5.5 (which it will have).

 IMO {{{jquery-migrate}}} could be kept at least for this cycle. Preferably
 with {{{_doing_it_wrong}}} messaging to allow for a smoother transition
 down the line (if that's something that can be introduced in time).

 At the very least a {{{.live()}}} (the most likely offender) should be
 polyfilled for 5.5 - with debug console logs to alert plugin devs for a
 whole cycle.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37110#comment:149>
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