[wp-trac] [WordPress Trac] #47156: Consider a way to clear the wp.a11y.speak() live regions

[WordPress Trac]

#47156: Consider a way to clear the wp.a11y.speak() live regions
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 Reporter:  afercia                    |      Owner:  (none)
     Type:  enhancement                |     Status:  new
 Priority:  normal                     |  Milestone:  Awaiting Review
Component:  Administration             |    Version:
 Severity:  normal                     |   Keywords:  has-screenshots
  Focuses:  accessibility, javascript  |
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 Splitting this out from the WPCamput/Tenon accessibility report, see
 https://github.com/WordPress/gutenberg/issues/15296. See also #47144.

 When `wp.a11y.speak()` is used to make screen readers announce a message,
 it updates the content of the visually hidden ARIA live regions placed at
 the end of the page source.

 In most of the cases this is not a problem but, when screen reader users
 continue to navigate the page content by arrowing, they may encounter
 again the text that was previously announced, because this text is
 perceived as normal content by assistive technologies.

 Ideally, there should be a way to clear the ARIA live regions before users
 get to them by arrowing. This aw also the feedback from the WPCampus
 report:

 > clear the live region so that users who encounter it while manually
 reading do not hear it.

 However, clearing the live regions shouldn't depend on a specific user
 action or scenario. It would require a more generic solution, preferably
 avoiding `setTimeout()` which seems to me a very fragile solution by its
 own nature.

 This applies to the a11y JavaScript package as well.

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Ticket URL: <https://core.trac.wordpress.org/ticket/47156>
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