[wp-trac] [WordPress Trac] #27355: Customizer: Add framework for selective refresh (partial preview refreshes)

[WordPress Trac]

#27355: Customizer: Add framework for selective refresh (partial preview refreshes)
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 Reporter:  westonruter                          |       Owner:
     Type:  task (blessed)                       |  westonruter
 Priority:  normal                               |      Status:  closed
Component:  Customize                            |   Milestone:  4.5
 Severity:  normal                               |     Version:  3.4
 Keywords:  has-patch has-unit-tests commit      |  Resolution:  fixed
  has-screenshots                                |     Focuses:  javascript
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Comment (by westonruter):

 In [changeset:"36889"]:
 {{{
 #!CommitTicketReference repository="" revision="36889"
 Customize: Fix regressions and harden implementation of selective refresh
 for nav menus.

 * Request full refresh if there are nav menu instances that lack partials
 for a changed setting.
 * Restore `WP_Customize_Nav_Menus::$preview_nav_menu_instance_args` and
 `WP_Customize_Nav_Menus::export_preview_data()` from 4.3, and keeping a
 tally of all `wp_nav_menu()` calls regardless of whether they can use
 selective refresh.
 * Ensure that all instances of `wp_nav_menu()` are tallied, regardless of
 whether they are made during the initial preview call or during subsequent
 partial renderings. Export `nav_menu_instance_args` with each partial
 rendering response just as they are returned when rendering the preview as
 a whole.
 * Fix issues with Custom Menu widget where nav menu items would fail to
 render when switching between menus when a menu lacked items to begin
 with.
 * Make sure the fallback behavior is invoked when the partial is no longer
 associated with a menu.
 * Do fallback behavior to refresh preview when all menu items are removed
 from a menu.

 Follows [36586].
 See #27355.
 Fixes #35362.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/27355#comment:93>
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