mask-image.html - mozsearch

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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:
- /paint-timing/with-first-paint/mask-image.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<body>

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

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

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

<style>

  #masked {

    width: 0px;

    height: 100px;

    -webkit-mask-image: url(../resources/circle.svg);

    mask-image: url(../resources/circle.svg);

</style>

<div id='masked'></div>

<script>

setup({"hide_test_state": true});

promise_test(async t => {

  const onload = new Promise(r => window.addEventListener('load', r));

  await onload;

  return assertNoFirstContentfulPaint(t).then(() => {

    document.getElementById('masked').style.width = '100px';

  }).then(() => {

    return assertFirstContentfulPaint(t);

});

}, 'Mask image triggers First Contentful Paint.');

</script>

</body>