css/css-contain/content-visibility/content-visibility-043.html

<!doctype HTML>
<html class="reftest-wait">
<meta charset="utf8">
<title>Content Visibility: scroll child into view, and adopt to a document</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="container-ref.html">
<meta name="assert" content="scrollIntoView on a hidden subtree is a no-op">
<meta name="assert" content="adopting an element in a hidden subtree works (no asserts / crashes)">

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

<style>
#container {
  width: 150px;
  height: 150px;
  background: lightblue;
  color: red;
}
.hidden {
  content-visibility: hidden;
}
</style>
<div id=container class=hidden>
  FAIL.
  <div id=child></div>
</div>

<script>
function moveChild() {
  child.scrollIntoView();
  document.implementation.createDocument( "", null).adoptNode(child);
  requestAnimationFrame(takeScreenshot);
}

async function runTest() {
  requestAnimationFrame(moveChild);
}

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