portals/resources/portal-host.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE html>
 <body>
   <script>
     if (window.portalHost)
       window.portalHost.postMessage("has host", "*");
   </script>
 </body>
	<!DOCTYPE html>
	<body>
	<script>
	if (window.portalHost)
	window.portalHost.postMessage("has host", "*");
	</script>
	</body>