containertiming-with-ignore-and-child-img.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:
- /container-timing/tentative/containertiming-with-ignore-and-child-img.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Container Timing: observe with a node with containertiming and containertiming-ignore, and an image child</title>

<body>

<style>

body {

  margin: 0;

</style>

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

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

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

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

<script>

  let beforeRender;

  async_test(function (t) {

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

    const observer = new PerformanceObserver(

      t.step_func_done(function(entryList) {

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

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

        checkContainerEntry(entry, 'div_ct', 'img_id', beforeRender)

        checkRect(entry, [0, 100, 0, 100])

        checkContainerSize(entry, 10000);

})

);

    observer.observe({entryTypes: ['container']});

    // Add a div that is the container timing root

    // and containertiming-ignore, that should be ignored as

    // containertiming takes precedence.

    const div = document.createElement('div');

    div.setAttribute('containertiming', 'div_ct');

    div.setAttribute('containertiming-ignore', '');

    document.body.appendChild(div);

    // Add image of width equal to 100 and height equal to 100.

    const img = document.createElement('img');

    img.src = '/container-timing/resources/square100.png';

    img.setAttribute('id', 'img_id');

    div.appendChild(img);

    beforeRender = performance.now();

  }, 'Paint of the image child of container timing with ignore is not blocked.');

</script>

</body>