[wp-trac] [WordPress Trac] #21483: Refactor Customizer Upload, Image, and Background Image controls to leverage the media library/modal

[WordPress Trac]

#21483: Refactor Customizer Upload, Image, and Background Image controls to
leverage the media library/modal
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 Reporter:  jjonesftw                            |       Owner:
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  4.1
Component:  Customize                            |     Version:  3.5
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing dev-         |     Focuses:  ui,
  feedback ui-feedback ux-feedback               |  javascript
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Comment (by celloexpressions):

 Clarification on everywhere that this impacts:
 - All media-related controls that theme and plugin developers implement
 via the Customizer API; specifically, instances and subclasses of
 `WP_Customize_Upload_Control` (and by extension
 `WP_Customize_Image_Control`. This technically supports all filetypes that
 are allowed to be uploaded, and will be an improvement for all of them.
 Audio/video is included, and we can incorporate audio/video previewing
 with minimal effort.
 - Core background image control.
 - NOT the header image control - eventually that should be adjusted to use
 some of the newer APIs that we've developed here.

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Ticket URL: <https://core.trac.wordpress.org/ticket/21483#comment:41>
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