[wp-trac] [WordPress Trac] #32720: Customizer Menus: Accessibility: improve search for menu items

[WordPress Trac]

#32720: Customizer Menus: Accessibility: improve search for 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:  has-patch     |     Focuses:  accessibility, javascript
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Changes (by afercia):

 * keywords:  needs-patch => has-patch
 * focuses:  accessibility => accessibility, javascript


Comment:

 First pass:
 - add a description and an `aria-describedby` attribute to inform users
 this is a "live" search
 - add some `wp.a11y.speak` messages to announce the number of search
 results, as done for Themes see #26600
 - use `aria-busy` to stop screen readers announcing content while the
 "loading more results" is running
 - increase the search debounce wait interval to 500ms
 - fix a small bug where the message dispatched to `wp.a11y.speak` may be
 an undefined variable

 See in the screenshot below the new messages logged in the console when
 searching for (in order):
 - "markup"
 - "mark"
 - "ma"
 - and then when scrolling or tabbing through the results

 [[Image(https://cldup.com/NO3a9Nln9q.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/32720#comment:5>
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