<style>
  :has(:not(:checked)) {
    foo: bar;
  }
</style>
<script>
  if (window.testRunner)
    testRunner.dumpAsText();
  onload = () => {
    let select = document.createElement('select');
    document.head.append(document.createElement('object'));
    document.head.append(select);
    select.append(document.createElement('option'));
    document.execCommand('SelectAll');
    select.append(document.createElement('div'));
    document.write('PASS');
  };
</script>