[Webkit-unassigned] [Bug 183083] New: aria-hidden and absolutely positioned iframes has its scrollbar announced

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=183083

            Bug ID: 183083
           Summary: aria-hidden and absolutely positioned iframes has its
                    scrollbar announced
           Product: WebKit
           Version: Safari 11
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: brkemper at mac.com
                CC: webkit-bug-importer at group.apple.com

An iframe with 'aria-hidden' is not something that you can get to with VoiceOver, which is expected. But if the iframe is absolutely positioned, then you **can** get to its scroll bar, which is announced as "vertical scrollbar". If you then interact with it (VO + shift down-arow, then VO + space), you end up on some random word within the iframe.

Reduced example:

http://jsbin.com/dijojuciki

1. Turn on Voice Over
2. start in the first text input field in the top left corner
3. Use the VO + right arrow to advance to the next text input.
4. Use the VO + right arrow to advance to the next AT-visible item on the page

Expected Result should be:

returns to first text field, because everything else is aria hidden

Actual Result:

"vertical scrollbar"

further:

5. Use VO + shift  + down-arow to enter the scrollbar
6. Use VO + space-key to activate (I don't know what other keys are supposed to work here)

Actual result:

Voice Over goes to and announces one of the words in the iframe content, which is supposed to be hidden to Voice Over.

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