chromium/src/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/register-closed-window-iframe.html - manifest_repos/chromium_src - Git at Google

 <html>
 <head>
 <script>
 window.addEventListener('message', async function(evt) {
   if (evt.data === 'START') {
     var w = window.open('./');
     var sw = w.navigator.serviceWorker;
     w.close();
     w = null;
     try {
       await sw.register('doesntmatter.js');
     } finally {
       parent.postMessage('OK', '*');
     }
   }
 });
 </script>
 </head>
 </html>
	<html>
	<head>
	<script>
	window.addEventListener('message', async function(evt) {
	if (evt.data === 'START') {
	var w = window.open('./');
	var sw = w.navigator.serviceWorker;
	w.close();
	w = null;
	try {
	await sw.register('doesntmatter.js');
	} finally {
	parent.postMessage('OK', '*');
	}
	}
	});
	</script>
	</head>
	</html>