content-visibility-hidden-div-with-frame.html

<!DOCTYPE html>

<style>
iframe {
  width: 10px;
  height: 10px;
  border: none;
  padding: 0;
  margin: 0;
}
body {
  padding: 0;
  margin: 0;
  height: 200px;
}
</style>
<div id=d>
<iframe id=frame></iframe>
</div>

<script>
if (window.testRunner)
  testRunner.waitUntilDone();

requestAnimationFrame(() => requestAnimationFrame(() => {
  d.style = "content-visibility: hidden";
  frame.srcdoc = '<table> <marquee></marquee></table>';
  if (window.testRunner) {
      testRunner.dumpAsLayout();
      testRunner.notifyDone();
  }
}));
</script>

chromium/third_party/blink/web_tests/compositing/iframes/content-visibility-hidden-div-with-frame.html