f');
            });
          })();
        </script>
      </li>

      <li>
        <strong>requestIdleCallback()</strong>
        <code id="testWindowRic"></code>
        <script type="text/partytown">
          (function () {
            requestIdleCallback(
              () => {
                const elm = document.getElementById('testWindowRic');
                elm.textContent = true;
                elm.classList.add('testWindowRic');
              },
              { timeout: 500 }
            );
 