[Webkit-unassigned] [Bug 218319] New: AX: aria-describedby not supported for ARIA treeitem role

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218319

            Bug ID: 218319
           Summary: AX: aria-describedby not supported for ARIA treeitem
                    role
           Product: WebKit
           Version: Safari 14
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: todd.kloots at gmail.com
                CC: webkit-bug-importer at group.apple.com

Created attachment 412605

  --> https://bugs.webkit.org/attachment.cgi?id=412605&action=review

Screen recording of the how the aria-describedby value is not announced by Voiceover

Steps to reproduce the problem:
1. Start VoiceOver
2. Go to https://codepen.io/toddlr/pen/yLJvKvJ
3. Move focus to the ARIA tree example
4. Navigate to the first two items in the tree using the arrow keys
5. Notice the description provided by aria-describedby is not announced by VoiceOver

What is the expected behavior?
The description provided by aria-describedby should be announced by VoiceOver

What went wrong?
The description provided by aria-describedby is not announced by VoiceOver

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