LayoutTests/http/tests/security/resources/getdatabases-otherwindow.html - WebKit - Git at Google

 <head>
 <script>
 indexedDB.deleteDatabase('getdatabase-otherwindow').onsuccess = () => {
     indexedDB.open('getdatabase-otherwindow').onsuccess = () => {
         window.opener.postMessage("Hi there!", "*");
     }
 }
 </script>
 </head>
	<head>
	<script>
	indexedDB.deleteDatabase('getdatabase-otherwindow').onsuccess = () => {
	indexedDB.open('getdatabase-otherwindow').onsuccess = () => {
	window.opener.postMessage("Hi there!", "*");
	}
	}
	</script>
	</head>