navigation-redirect-to-http-iframe.html

<!DOCTYPE html>
<script src="/common/get-host-info.sub.js"></script>
<script src="test-helpers.sub.js"></script>
<script>
var SCOPE = './redirect.py?Redirect=' + encodeURI('http://example.com');
var SCRIPT = 'navigation-redirect-to-http-worker.js';
var host_info = get_host_info();

navigator.serviceWorker.getRegistration(SCOPE)
  .then(function(registration) {
      if (registration)
        return registration.unregister();
    })
  .then(function() {
      return navigator.serviceWorker.register(SCRIPT, {scope: SCOPE});
    })
  .then(function(registration) {
      return new Promise(function(resolve) {
          registration.addEventListener('updatefound', function() {
              resolve(registration.installing);
            });
        });
    })
  .then(function(worker) {
      worker.addEventListener('statechange', on_state_change);
    })
  .catch(function(reason) {
      window.parent.postMessage({results: 'FAILURE: ' + reason.message},
                                host_info['HTTPS_ORIGIN']);
     });

function on_state_change(event) {
  if (event.target.state != 'activated')
    return;
  with_iframe(SCOPE, {auto_remove: false})
    .then(function(frame) {
        window.parent.postMessage(
            {results: frame.contentDocument.body.textContent},
            host_info['HTTPS_ORIGIN']);
      });
}
</script>

chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/navigation-redirect-to-http-iframe.html