wpt/css/compositing/root-element-opacity-change.html at master · web-platform-tests/wpt · GitHub

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<!doctype HTML>

<html class="test-wait" style="font-size: 200px; opacity: 0.5">

<link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop">

<link rel="match" href="root-element-opacity-change-ref.html">

<meta name="assert" content="View background should be white after opacity changes from 0.5 to 1">

<script src="/common/rendering-utils.js"></script>

TEST

<script>

waitForAtLeastOneFrame().then(() => {

document.documentElement.style.opacity=1;

document.documentElement.classList.remove('test-wait');

});

</script>

</html>