[Webkit-unassigned] [Bug 256186] New: AX: Setting aria-hidden on a slot does not hide the slots assigned nodes

Mon May 1 16:49:16 PDT 2023

https://bugs.webkit.org/show_bug.cgi?id=256186

            Bug ID: 256186
           Summary: AX: Setting aria-hidden on a slot does not hide the
                    slots assigned nodes
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tyler_w at apple.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Testcase:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<body>
<x-button>slot<span>with child</span></x-button>
<script>
class XButton extends HTMLElement {
    constructor() {
        super();
        this.attachShadow({ mode: "open", delegatesFocus: true });
        const fragment = document.createRange().createContextualFragment("<input id='button' aria-labelledby='slot' type=button><slot id='slot' aria-hidden='true'></slot>");
        this.shadowRoot.append(fragment.cloneNode(true));
    }
}
customElements.define("x-button", XButton);
</script>
</body>
</html>

The only element exposed on this page should be the button, but WebKit exposes the text "slot with child" as well. Firefox and Chrome do not behave this way.

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