clients-get-frame.html | Explore in Territory

<!DOCTYPE html>
<script>

  fetch("clientId")
    .then(function(response) {
        return response.text();
      })
    .then(function(text) {
        parent.postMessage({clientId: text}, "*");
      });

</script>

chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/clients-get-frame.html