[wp-trac] [WordPress Trac] #32712: Customizer Menus: add a way to extend available menu items

[WordPress Trac]

#32712: Customizer Menus: add a way to extend available menu items
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 Reporter:  designsimply  |       Owner:
     Type:  enhancement   |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Customize     |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by designsimply):

 Also copying in @westonruter's previous comment from
 https://github.com/voldemortensen/menu-
 customizer/issues/103#issuecomment-111257349 because it's worth noting:

 > Yes, this is something that needs to be added at some point. I have an
 initial TODO for where we can pick up additional controls added:
 https://github.com/WordPress/WordPress/blob/f5fa907f77ea0b3e1035de96c6de6c1be37b4688
 /wp-admin/js/customize-nav-menus.js#L1061
 >
 > What comes to mind to implement this is:
 >
 > 1. Ability to add new controls to the template.
 > 1. Connect the new controls to the setting, with custom validation
 logic.
 > 1. Add support for filtering the postmeta for a given nav_menu_item so
 that any custom fields will get previewed as expected.
 > 1. Update the WP_Customize_Nav_Menu_Item_Setting to store any non-core
 attributes in postmeta, and draw from postmeta when obtaining the setting
 value.
 >
 > The first two can be done in JS now, although there isn't a nice API for
 doing it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32712#comment:1>
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