[wp-trac] [WordPress Trac] #31320: Make customizer JavaScript API available during the live preview

[WordPress Trac]

#31320: Make customizer JavaScript API available during the live preview
-------------------------+-------------------------
 Reporter:  Fab1en       |       Owner:
     Type:  enhancement  |      Status:  closed
 Priority:  normal       |   Milestone:  4.5
Component:  Customize    |     Version:  4.1
 Severity:  normal       |  Resolution:  fixed
 Keywords:               |     Focuses:  javascript
-------------------------+-------------------------
Changes (by westonruter):

 * keywords:  needs-patch =>
 * status:  reopened => closed
 * focuses:  javascript, performance => javascript
 * resolution:   => fixed
 * milestone:  Awaiting Review => 4.5


Comment:

 @sidati Hi, there aren't any plans to add a `widgets-ready` or `sidebars-
 ready` event. I don't see a use case for why it would be necessary. If you
 want to ensure that your code fires after widgets are initialized, you can
 do:

 {{{#!js
 wp.customize.bind( 'ready', _.defer( function() { /* your code here */ } )
 );
 }}}

 @Fab1en: Also, your original use case of wanting to focus on a control
 from the preview is not generally available by sending a message from the
 preview like this:

 {{{#!js
 wp.customize.preview.send( 'focus-control-for-setting', 'blogname' );
 }}}

 Support for sending this message was added in [36586] for #27355 in the
 implementation of selective refresh. Shift-clicking on any partial
 registered for selective refresh will send this `focus-control-for-
 setting` automatically. But you can use it yourself manually outside the
 context of partials.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31320#comment:12>
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