[wp-trac] [WordPress Trac] #28976: Add Media Panel: Announce context of close button for screen readers

[WordPress Trac]

#28976: Add Media Panel: Announce context of close button for screen readers
---------------------------+-----------------------------
 Reporter:  joedolson      |      Owner:
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Media          |    Version:  trunk
 Severity:  normal         |   Keywords:
  Focuses:  accessibility  |
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 The current text of the Add Media Panel close button is just "Close". For
 screen readers, it's important to be notified what will be closed when you
 select this option, so that they can be certain that they're closing the
 right thing.

 Changes text to "Close Media Panel" to provide context for screen readers.

 Same patch also changes Close text from being a title attribute (which
 will only be announced in some screen readers with some configurations)
 screen-reader-hidden text.

 Related: #25105

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Ticket URL: <https://core.trac.wordpress.org/ticket/28976>
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