[Webkit-unassigned] [Bug 254934] New: AX: Slot elements referenced with aria-labelledby have no label

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254934

            Bug ID: 254934
           Summary: AX: Slot elements referenced with aria-labelledby have
                    no label
           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: clshortfuse at gmail.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

When using a ShadowDOM, an HTMLInputElement that references an HTMLSlotElement will not provide a label, unless that HTMLSlotElement has a display property other than "contents" (eg: inline-block).

See ShadowDOM tests 13 & 14 in this codepen: https://codepen.io/shortfuse/pen/PodMYBo

There are other bugs noted on the CodePen, but I'd like to specifically target this one related to HTMLSlotElement.

Sample tree:

<x-button>
  #shadow-root
    <input type=button aria-labelledby=slot>
    <slot id=slot></slot>
</x-button>

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