lcp_detached_window.html | Explore in Territory

<!doctype html>
<html>

<head>
</head>

<body>
  <script>
    const addImage = async (openedWindow) => {
      await new Promise(resolve => {
        const img = openedWindow.document.createElement('img');
        img.addEventListener('load', resolve);
        img.src = '/images/lcp-16x16.png';
        openedWindow.document.body.appendChild(img);
      });
    }

    const runTest = () => {
      let otherWindow = window.open(document.location.origin + '/lcp_breakdown_timings.html');
      otherWindow.addEventListener('load', () => {
        window.addEventListener('message', otherWindow.close);
        addImage(otherWindow);
      });
    }
  </script>
</body>

</html>

chromium/chrome/browser/page_load_metrics/integration_tests/data/lcp_detached_window.html