android_webview/test/data/post_message_with_ports.html - chromium/src - Git at Google

 <html>
   <head>
     <script>
       let channel = new MessageChannel();
       myObject.postMessage("Hello", [channel.port1]);

       channel.port2.onmessage = function(e) {
         document.title = e.data;
       }
     </script>
   </head>
   <body>
     <div>post message with ports</div>
   </body>
 </html>
	<html>
	<head>
	<script>
	let channel = new MessageChannel();
	myObject.postMessage("Hello", [channel.port1]);

	channel.port2.onmessage = function(e) {
	document.title = e.data;
	}
	</script>
	</head>
	<body>
	<div>post message with ports</div>
	</body>
	</html>