chromium/third_party/blink/web_tests/external/wpt/css/css-contain/content-visibility/content-visibility-051.html

<!doctype HTML>
<html class="reftest-wait">
<meta charset="utf8">
<title>CSS Content Visibility: switching to block stop painting</title>
<link rel="author" title="Vladimir Levin" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="container-ref.html">
<meta name="assert" content="content-visibility has no effect on non-atomic inlines, but switching to block stop painting">

<script src="/common/reftest-wait.js"></script>

<style>
#container {
  content-visibility: hidden;
  width: 150px;
  height: 150px;
  background: lightblue;
}
.inline {
  display: inline;
}
#child {
  width: 50px;
  height: 50px;
  background: red;
}
</style>

<div id=container class=inline>
  Test fails if you see this text or a red box.
  <div id=child></div>
  <span>Fail.</span>
</div>

<script>
function runTest() {
  const container = document.getElementById("container");
  container.classList.remove("inline");
  takeScreenshot();
}

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