[Webkit-unassigned] [Bug 230609] New: AX: aria-expanded is no longer supported on quite a few roles in ARIA 1.2

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230609

            Bug ID: 230609
           Summary: AX: aria-expanded is no longer supported on quite a
                    few roles in ARIA 1.2
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jdiggs at igalia.com
                CC: andresg_22 at apple.com, cfleizach at apple.com,
                    jcraig at apple.com, webkit-bug-importer at group.apple.com

Steps to reproduce:
1. View data:text/html,<div role="dialog" aria-expanded="true"></div>
2. Examine the dialog using XCode's Accessibility Inspector

Expected results: AXExpanded would not be true

Actual results: AXExpanded is true

A change was made in ARIA 1.2 removing aria-expanded as a supported property from a whole bunch of roles. See https://www.w3.org/TR/wai-aria-1.2/#aria-expanded. Dialog is just an example.

Under https://www.w3.org/TR/wai-aria-1.2/#state_property_processing, it says:

    User agents MUST ignore non-global states and properties used on an element without a role supporting the state or property;

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