css-generated-text.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/css-generated-text.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Element Timing: observe generated CSS text</title>

<style>

p::before {

  content: "Generated text prefix";

body {

  margin: 20px;

</style>

<body>

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

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

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

<p elementtiming='my_text' id='text_id'></p>

<script>

  async_test(function (t) {

    const beforeRender = performance.now();

    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];

        checkTextElement(entry, 'my_text', 'text_id', beforeRender, document.getElementById('text_id'));

        assert_equals(entry.intersectionRect.left, 20, 'left should be 20.');

        assert_equals(entry.intersectionRect.top, 20, 'top should be 20.');

        // Try a lower bound of height=10, width=80 for the generated text.

        assert_greater_than_equal(entry.intersectionRect.right, 100);

        assert_greater_than_equal(entry.intersectionRect.bottom, 30);

})

);

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

  }, 'Generated text content is observable.');

</script>

</body>