tyle);
            const elm = document.getElementById('testCssRulesLength');
            elm.textContent = style.sheet.cssRules.length;
          })();
        </script>
      </li>

      <li>
        <strong>sheet.ownerNode</strong>
        <code id="testOwnerNode"></code>
        <script type="text/partytown">
          (function () {
            const style = document.createElement('style');
            document.head.appendChild(style);
            const elm = document.getElementById('testOwnerNode');
