[Webkit-unassigned] [Bug 273619] New: AX: Status not announced in shadow root

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=273619

            Bug ID: 273619
           Summary: AX: Status not announced in shadow root
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Mac (Apple Silicon)
                OS: macOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: istvantutto at gmail.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

An element with `role=status` attribute should announce updates within its descendants when using VoiceOver.
This works well in a regular case, however it is broken when the descendants are provided via a `<slot>` element within a shadowRoot.

How to recreate:
Start Safari plus VoiceOver and visit the simplified demo: https://codepen.io/istutto/pen/LYvKPdY
Select the button "Add message to nested status" and note how the added message is not automatically announced by VoiceOver.
For comparison, click the "Add message to Status" button and you'll find that the message is announced.

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