[wp-trac] [WordPress Trac] #27620: Customizer background image drop zone text glitch

[WordPress Trac]

#27620: Customizer background image drop zone text glitch
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 Reporter:  astralbodies  |       Owner:  ocean90
     Type:  defect (bug)  |      Status:  reviewing
 Priority:  normal        |   Milestone:  3.9
Component:  Appearance    |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:  ui
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Comment (by adamsilverstein):

 Replying to [comment:7 ocean90]:
 > Replying to [comment:6 rachelbaker]:
 > > Thank you for testing this.  `this.supports.dragdrop` wasn't being set
 properly.  Happy to go back and try to debug why that was the case.
 >
 > this.uploader.bind( 'init', function( uploader ) { .. } in wp-upload.js
 runs after this.uploader.init() in customize-controls.js. Because of this
 `this.supports.dragdrop` is undefined.

 In [attachment:27620.2.patch] I reproduced the code from Modernizr we are
 using internally (later) to check for drag & drop support. I verified this
 works correctly across IE 8->11 and in firefox; I would expect it to work
 correctly across browsers.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27620#comment:9>
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