fetch-response.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">

<script>
    const params  =new URLSearchParams(location.search);
    const mode = params.get("mode") || "cors";
    const path = params.get('path');
    const bufferPromise =
      new Promise(resolve =>
        fetch(path, {mode})
          .then(response => resolve(response.arrayBuffer()))
          .catch(() => resolve(new Uint8Array())));

    const entryPromise = new Promise(resolve => {
      new PerformanceObserver(entries => {
        const byName = entries.getEntriesByType("resource").find(e => e.name.includes(path));
        if (byName)
          resolve(byName);
      }).observe({entryTypes: ["resource"]});
    });

    Promise.all([bufferPromise, entryPromise]).then(([buffer, entry]) => {
      parent.postMessage({
        buffer,
        entry: entry.toJSON(),
    }, '*');
    });

</script>

chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/fetch-response.html