[wp-trac] [WordPress Trac] #34344: Expanded section margin-top glitches when other section is deactivated

[WordPress Trac]

#34344: Expanded section margin-top glitches when other section is deactivated
--------------------------+----------------------------
 Reporter:  westonruter   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Future Release
Component:  Customize     |    Version:  4.2
 Severity:  normal        |   Keywords:  needs-patch
  Focuses:  javascript    |
--------------------------+----------------------------
 After having expanded a section, if you then deactivate another section,
 the `margin-top` for the expanded section causes the contents to go out of
 view. Additionally, deactivated section is incorrectly animated when it
 should just collapse instantly since it is not in view.

 To reproduce the problem in Twenty Fifteen, execute the following from the
 console:

 {{{#!js
 wp.customize.section('header_image').expand( { completeCallback:
 function() {
         _.delay( function(){ wp.customize.section('colors').active(false);
 }, 1000 );
 } } );
 }}}

 Video depicting the above behavior: https://cloudup.com/cP5JgMgkqFu

 Relates to #33567.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34344>
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