 === 'function';
          })();
        </script>
      </li>

      <li>
        <strong>WorkerGlobalScope</strong>
        <code id="testWorkerGlobalScope"></code>
        <script type="text/partytown">
          (function () {
            const elm = document.getElementById('testWorkerGlobalScope');
            elm.textContent = typeof WorkerGlobalScope !== 'undefined';
          })();
        </script>
      </li>

      <li>
        <strong>visualViewport</strong>
        <code id="testVisualViewport"