contain-crash.html

Enable keyboard shortcuts

<!DOCTYPE html>

<link rel="help" href="https://crbug.com/1129563">

<body style="contain: size layout;">

  <div id="target" style="contain: size layout;"></div>

  <div id="child"></div>

</body>

<script>

document.body.offsetTop;

const target = document.getElementById('target');

const child = document.getElementById('child');

target.appendChild(child);

</script>