[Webkit-unassigned] [Bug 245299] New: getAttribute('aria-activedescendant') should return null when the assigned node has moved to a shadow tree

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=245299

            Bug ID: 245299
           Summary: getAttribute('aria-activedescendant') should return
                    null when the assigned node has moved to a shadow tree
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Created attachment 462404

  --> https://bugs.webkit.org/attachment.cgi?id=462404&action=review

Test

In the attached test case, we should see:
[object HTMLDivElement]
bar
null
null

Instead, we see:
[object HTMLDivElement]
bar
null
null

That is, when the node assigned to element.ariaActiveDescendantElement
has been moved to inside a shadow tree, getAttribute('aria-activedescendant') should return null.

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