[Webkit-unassigned] [Bug 174095] New: AX: Voiceover skips elements when js changes aria-hidden and container has many children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174095

            Bug ID: 174095
           Summary: AX: Voiceover skips elements when js changes
                    aria-hidden and container has many children
           Product: WebKit
           Version: Safari 10
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rach_mc123456 at yahoo.com
                CC: webkit-bug-importer at group.apple.com

Created attachment 314482

  --> https://bugs.webkit.org/attachment.cgi?id=314482&action=review

Test case

When using vo+right to select a button which shows/hides some content (by changing display setting and aria-hidden property). If the container has more than around 50 elements, it is impossible to vo+right to the newly shown element.

If you remove some of the numbered <p> tags, the issue goes away.

Test case attached.

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