[wp-trac] [WordPress Trac] #44820: CodeMirror in Customize - copy & paste bug

[WordPress Trac]

#44820: CodeMirror in Customize - copy & paste bug
-----------------------------+---------------------------------------------
 Reporter:  dionysous        |       Owner:  (none)
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  Future Release
Component:  Customize        |     Version:  4.9
 Severity:  minor            |  Resolution:
 Keywords:  has-patch close  |     Focuses:  ui, javascript, administration
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Changes (by SirLouen):

 * keywords:  has-patch needs-testing => has-patch close


Comment:

 Replying to [comment:2 SergeyBiryukov]:
 > 1. Does it happen in CodeMirror demos on https://codemirror.net?

 This is a problem in CodeMirror, I've been able to replicate it in the
 demo

 === Testing Instructions

 1. Add this code [https://codemirror.net/try/ to the demo], and copy the
 shared URL

 {{{
 .class .class-2 #id-here {

 }

 }}}

 Important the last space in the code

 Or use this URL:
 https://codemirror.net/try/#c=LmNsYXNzIC5jbGFzcy0yICNpZC1oZXJlIHsKCn0K

 2. Then open the Shared URL and copy this code: `.class .class-2 #id-here
 {`
 3. 🐞 It will jump

 The right thing here is to report upstream this error to CodeMirror. But
 since Customizer is in Maintenance mode, I'm not sure if we are going to
 be willing to support a forked static version of CodeMirror forever.

 Replying to [comment:5 zackpyle]:
 > How is this still not fixed 4 years later?

 TLTR; Its a CodeMirror issue and as said, Customizer entered this
 maintenace mode long time ago. Given that this is happening in upstream
 system, and it doesn't seem to be a major bug, its unlikely this will ever
 get fixed. My recommendation is that you stop using Customizer's CSS
 editor and move all the CSS code you have there to a supported place.

 === Conclusion
 I'm not sure if this could be considered a bug or an enhancement but
 ultimately is a very low-key bug that is happening upstream also, so I
 doubt it has been considered relevant at all. I'm proposing this as a
 `close`, `wontfix`

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Ticket URL: <https://core.trac.wordpress.org/ticket/44820#comment:6>
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