//grant permission to post notification in config.xml
<tizen:privilege name="http://tizen.org/privilege/notification"/>
    
//post web notification
if (!("Notification" in window)) {
    alert("Web Notifications are not supported");
} else {
    var notification = new Notification("Notification Message");
}


//or you can request permissions in code directly

if (!("Notification" in window)) {
    alert("Web Notifications are not supported");
}
//check permission to send notifications
else if (Notification.permission === "granted") {
    //if allowed to post notification
    var notification = new Notification("Hi there!");
}
//otherwise, request permission
else if (Notification.permission !== 'denied') {
    Notification.requestPermission(function (permission) {
        //if the user has allowed permission, then the post notification 
    	if (permission === "granted") {
    	    var notification = new Notification("Hi there!");
    	}
    });
}