ManualTests/notification-in-multiple-windows.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 Open this page through a web server in two views. If necessary request permission to post web notifications: <button onclick="requestPermission()">Request permission</button><br/>
 Then post this permission once in each page. <button onclick="postNotification()">Post notification</button><br/>
 Click on the notification. Only the second notification should be closed on the second page.
 <p id="console">
 </p>

 <script>
 function requestPermission() {
     if (Notification.permission == "granted") {
         log("Notification already granted");
         return;
     }

     log("Requesting permission...");
     Notification.requestPermission(function(permission) {
         if (Notification.permission == "granted") {
             log("Notification granted");
             return;
         }
         log("Notification denied");
     });
 }

 function postNotification() {
     var n = new Notification("Notification title");
     n.onshow = onShowHandler;
     n.onclick = onClickHandler;
     n.onclose = onCloseHandler;
 }

 function log(message) {
     document.getElementById("console").innerHTML += message + "<br/>";
 }

 function onShowHandler() {
     log("onshow handler called");
 }

 function onClickHandler() {
     log("onclick handler called");
     this.close();
 }

 function onCloseHandler() {
     log("onclose handler called");
 }
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	Open this page through a web server in two views. If necessary request permission to post web notifications: <button onclick="requestPermission()">Request permission</button><br/>
	Then post this permission once in each page. <button onclick="postNotification()">Post notification</button><br/>
	Click on the notification. Only the second notification should be closed on the second page.
	<p id="console">
	</p>

	<script>
	function requestPermission() {
	if (Notification.permission == "granted") {
	log("Notification already granted");
	return;
	}

	log("Requesting permission...");
	Notification.requestPermission(function(permission) {
	if (Notification.permission == "granted") {
	log("Notification granted");
	return;
	}
	log("Notification denied");
	});
	}

	function postNotification() {
	var n = new Notification("Notification title");
	n.onshow = onShowHandler;
	n.onclick = onClickHandler;
	n.onclose = onCloseHandler;
	}

	function log(message) {
	document.getElementById("console").innerHTML += message + "<br/>";
	}

	function onShowHandler() {
	log("onshow handler called");
	}

	function onClickHandler() {
	log("onclick handler called");
	this.close();
	}

	function onCloseHandler() {
	log("onclose handler called");
	}
	</script>
	</body>
	</html>