css/css-contain/content-visibility/content-visibility-019.sub.https.html

<!doctype HTML>
<html class="reftest-wait">
<meta charset="utf8">
<title>Content Visibility: cross-origin iframe locking</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="content-visibility-019-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="../resources/utils.js"></script>

<style>
div {
  background: blue;
}
.hidden {
  content-visibility: hidden;
}
</style>

<div>lorem ipsum</div>
<iframe id="frame" width=400 height=200 src='https://{{domains[www]}}:{{ports[https][0]}}/wpt_internal/display-lock/css-content-visibility/resources/frame.html'></iframe>
<div>consectetur adipiscing elit</div>

<script>
async function runTest() {
  document.getElementById("frame").classList.add("hidden");
  requestAnimationFrame(takeScreenshot);
}

window.onload = () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(runTest);
  });
};
</script>
</html>