
      </li>

      <li>
        <strong>window.postMessage()</strong>
        <code>
          <span id="testPostMessage"></span>
        </code>
        <script type="text/partytown">
          (function () {
            const elm = document.getElementById('testPostMessage');
            window.onmessage = (ev) => {
              if (ev.data === '88') {
                elm.textContent = ev.type + ' ' + ev.data;
                elm.className = 'testPostMessage';
              }
            };
            w