[wp-trac] [WordPress Trac] #30850: Audio/video previews for media controls in the Customizer

[WordPress Trac]

#30850: Audio/video previews for media controls in the Customizer
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 Reporter:  celloexpressions         |       Owner:
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  4.2
Component:  Customize                |     Version:  4.1
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-refresh  |     Focuses:  javascript
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Comment (by Aniruddh):

 Replying to [comment:8 Fab1en]:
 > @westonruter : that's almost this, but the `expanded` event fires when
 the section start its expansion. I need an event that fires after the
 expansion is finished. In fact, what I need is called
 `defaultExpandedArguments.completeCallback` but I can't find a way to set
 it only for the proper control. Any hints ?

 I think a patch of customizer-controls.js should be added where we change
 the `defaultExpandedArguments.completeCallback` from` jQuery.noop` to an
 actual function where we trigger an `expanded` event.

 This will allow us to do something like this:


 {{{#!js
 wp.customize.section( theSection ).on( 'expanded', function() {
     //do something
 } );
 }}}

 And I think this event can be very useful.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30850#comment:9>
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