     createHTML: (string) => string.replace(/\>/g, '<'),
            });

            const escaped = escapeHTMLPolicy.createHTML('<img src=x onerror=alert(1)>');
            elm.innerHTML = escaped;

            elm.textContent = String(escaped instanceof TrustedHTML);
          })();
        </script>
      </li>

      <li>
        <strong>MediaSource.isTypeSupported()</strong>
        <code id="testIsTypeSupported"></code>
        <script type="text/partytown">
          (function () {
            const