[wp-trac] [WordPress Trac] #37974: Add multi-panel feature to pages through add_theme_support

[WordPress Trac]

#37974: Add multi-panel feature to pages through add_theme_support
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 Reporter:  karmatosed                   |       Owner:
     Type:  task (blessed)               |      Status:  new
 Priority:  normal                       |   Milestone:  4.7
Component:  Themes                       |     Version:
 Severity:  normal                       |  Resolution:
 Keywords:  has-ux-feedback needs-patch  |     Focuses:  ui
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Comment (by bradyvercher):

 Thanks for the feedback @westonruter. I started a refactor of this without
 Backbone views to get a better handle on the current approach in the
 Customizer, but it felt a lot more fragile and difficult to maintain.

 > As long as a control adheres to the general interface and its UI is
 encapsulated in the control, it shouldn't matter if the control's logic is
 handled by another library...

 Are you suggesting the views should be assigned to properties on the
 control instead of adding them to a public namespace?

 > The most important thing is ensuring that there is bidirectional sync
 between the control's setting and the UI state for the control. So this
 means there should be a: `control.setting.bind( function( value ){
 ui.setState( _.clone( value ) ); } )` and `ui.onChange( function( value )
 { control.setting.set( _.clone( value ) ); } )`. I don't see this in the
 patch, so it needs to be added.

 The setting only contains an array of post IDs, which would mean posts
 need to be fetched when the setting is changed to update the UI. The
 content endpoints from the REST API would come in really handy here,
 otherwise this might require another AJAX callback.

 It also seems like this might create an infinite loop.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37974#comment:158>
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