heading-prefixed.html

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This test has a WPT meta file that expects 6 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/selectors/heading-prefixed.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>:heading(N) matches prefixed HTML headings</title>

<link rel="help" href="https://drafts.csswg.org/selectors-5/#headings">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="host"></div>

<script>

const xhtml = "http://www.w3.org/1999/xhtml";

for (let level = 1; level <= 6; level++) {

  test(t => {

    const el = document.createElementNS(xhtml, `h:h${level}`);

    document.getElementById("host").append(el);

    t.add_cleanup(() => el.remove());

    assert_true(el.matches(`:heading(${level})`), `:heading(${level}) matches`);

    assert_true(el.matches(":heading"), ":heading matches");

  }, `:heading(${level}) matches <h:h${level}> in the HTML namespace`);

</script>