[Webkit-unassigned] [Bug 266789] New: AX: Accessible name in shadow slot fails in shadow DOM

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=266789

            Bug ID: 266789
           Summary: AX: Accessible name in shadow slot fails in shadow DOM
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: steverep+webkit at gmail.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Created attachment 469163

  --> https://bugs.webkit.org/attachment.cgi?id=469163&action=review

Button with component label in and out of shadow

An accessible name slotted into a child component of a simple button (or any other ARIA role) fails to be read by VoiceOver.  This only occurs when the role is also in a shadow root, i.e. the same code works in the light DOM.  Please see attached very minimal reproduction.

This is a major regression in Safari 17 as it can break labels for even very simple components.

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