chromium/src/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/clients-frame-freeze.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <script src="/resources/testdriver.js"></script>
 <script src="/resources/testdriver-vendor.js"></script>
 <script>
   document.addEventListener('freeze', () => {
       opener.postMessage('frozen', "*");
   });

   window.onmessage = (e) => {
     if (e.data == 'freeze') {
       test_driver.freeze();
     }
   };
   opener.postMessage('loaded', '*');
 </script>
	<!DOCTYPE html>
	<script src="/resources/testdriver.js"></script>
	<script src="/resources/testdriver-vendor.js"></script>
	<script>
	document.addEventListener('freeze', () => {
	opener.postMessage('frozen', "*");
	});

	window.onmessage = (e) => {
	if (e.data == 'freeze') {
	test_driver.freeze();
	}
	};
	opener.postMessage('loaded', '*');
	</script>