PASS if no crash or assert.
<script>
if (window.testRunner)
  testRunner.dumpAsText();

document.body.offsetTop;

let documentElement = document.documentElement;
documentElement.append(document.createTextNode("PASS if no crash or assert."));
let remove_this = document.createElement('div');
documentElement.append(remove_this);
documentElement.append(document.createElement('q'));
document.body.offsetTop;
remove_this.remove();
</script>