<html class="test-wait">
<body></body>
<script>
  const frameElem = document.createElement('iframe');

  frameElem.srcdoc = '<html><head><title>X</title></head><body><div>-</div></body></html>';
  frameElem.onload = function() {
    const frameDoc = frameElem.contentWindow.document;

    const divElem = frameDoc.querySelector('div');

    getComputedAccessibleNode(divElem).then(function(divAccessible) {
      // Close window.
      frameElem.remove();

      requestAnimationFrame(() => {
        // Window removed, but we try to access DOM of non-existent window.
        const isChecked = divAccessible.checked;
        // Test is complete.
        document.documentElement.className = '';
      });
    });
  };

  document.body.appendChild(frameElem);
</script>
</html>
