The Menu Customizer feature includes a performance technique whereby the controls for nav menu items are only embedded into the DOM once the containing menu section is expanded. This commit implements the same DOM deferral for widgets but goes a step further than just embedding the controls once the widget area's Customizer section is expanded: it also defers the embedding of the widget control's form until the widget is expanded, at which point the `widget-added` event also fires to allow any additional widget initialization to be done. The deferred DOM embedding can speed up initial load time by 10x or more. This DOM deferral also yields a reduction in overall memory usage in the browser process.
Includes changes to `wp_widget_control()` to facilitate separating out the widget form from the surrounding accordion container; also includes unit tests for this previously-untested function. Also included are initial QUnit tests (finally) for widgets in the Customizer.
Fixes#33901.
git-svn-id: https://develop.svn.wordpress.org/trunk@34563 602fd350-edb4-49c9-b593-d223f7449a82
* Always fall back to using the default template if no custom template exists.
* Provide a set of default params when constructing new `Section` and `Panel` objects.
Includes QUnit tests.
Props celloexpressions, westonruter, ocean90.
Fixes#30737.
git-svn-id: https://develop.svn.wordpress.org/trunk@32681 602fd350-edb4-49c9-b593-d223f7449a82
Includes tests for the broken `activate()`/`deactivate()` methods, which were fixed in [30871].
props westonruter.
see #30701.
git-svn-id: https://develop.svn.wordpress.org/trunk@30919 602fd350-edb4-49c9-b593-d223f7449a82
Weston Ruter
Ella Iseulde Van Dorpe
Dominik Schilling (ocean90)