[Webkit-unassigned] [Bug 220502] New: Radio buttons with no form owner are not grouped

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220502

            Bug ID: 220502
           Summary: Radio buttons with no form owner are not grouped
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: matt at s0lidstate.com
                CC: cdumez at apple.com, wenson_hsieh at apple.com

I created a series of tests to address issue #2551 (https://github.com/web-platform-tests/wpt/issues/2551) of the Web Platform Tests project. One of the tests is failing when run against Safari 118 Preview. The test consists of two radio button inputs that should be grouped according to the criteria in the HTML spec (type=radio, same tree, identical name attribute values, and no form owner).

The test results can be viewed in the Safari wpt.fyi link for the WPT pull request (https://github.com/web-platform-tests/wpt/pull/27029). The relevant test is labeled "Radio buttons in different groups (because they have different form owners or no form owner) do not affect each other's checkedness".

The test reveals that two radio buttons meeting all the criteria to be in the same group (type=radio, same tree, identical name attribute values, and no form owner) are not being properly grouped. The checked statuses of the two buttons are not mutually exclusive.

Link to the test results is https://wpt.fyi/results/html/semantics/forms/the-input-element/radio.html?diff&filter=ADC&run_id=5710239401771008&run_id=5647309809385472

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