lcp_breakdown_timings_with_subframe.html

<head>
  <script src="resources/util.js"></script>
</head>

<img src="/images/lcp-16x16.png">

<script>
  const addSubframe = async (subframe_urls) => {
    for (let i = 0; i < subframe_urls.length; i++) {
      await new Promise(resolve => {
        const iframe = document.createElement('iframe');
        iframe.addEventListener('load', resolve);
        iframe.src = subframe_urls[i];
        document.body.appendChild(iframe);
      });
    }
  }

  const addSameSiteSubframe = async () => {
    await addSubframe(["lcp_breakdown_timings_subframe_page1.html",
      "lcp_breakdown_timings_subframe_page2.html"]);
  }

  const addCrossSiteSubframe = async () => {
    await addSubframe([origin.replace("example.com", "b.com") + "/lcp_breakdown_timings_subframe_page1.html",
      "lcp_breakdown_timings_subframe_page2.html"]);
  }
</script>

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