fixed-id-identifier.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /element-timing/fixed-id-identifier.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Element Timing: entry does not change its id or identifier value</title>

<body>

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

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

<script src="resources/element-timing-helpers.js"></script>

<p elementtiming='my_identifier' id='my_id'>Text</p>

<script>

  async_test(function (t) {

    assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");

    const observer = new PerformanceObserver(

      t.step_func_done(function(entryList) {

        assert_equals(entryList.getEntries().length, 1);

        const entry = entryList.getEntries()[0];

        assert_equals(entry.id, 'my_id');

        assert_equals(entry.identifier, 'my_identifier');

        const element = document.getElementById('my_id');

        element.id = 'other_id';

        element.setAttribute('elementtiming', 'other_identifier');

        assert_equals(entry.id, 'my_id');

        assert_equals(entry.identifier, 'my_identifier');

})

);

    observer.observe({type: 'element', buffered: true});

  }, 'PerformanceElementTiming id and identifier do not change when Element changes.');

</script>

</body>