Adding Desktop Notifications to Your Web Applications

Download example from here

<button onclick="notifyMe()">Notify me!</button>

<script type="text/javascript">
    // request permission on page load
    document.addEventListener('DOMContentLoaded', function () {
        if (!Notification) {
            alert('Desktop notifications not available in your browser.');
            return;
        }
        if (Notification.permission !== "granted") {
            Notification.requestPermission();
        }
    });

    function notifyMe() {
        if (Notification.permission !== "granted") {
            Notification.requestPermission();
        }
        else {
            setTimeout(function() {
                var notification = new Notification('Notification Title', {
                    icon: 'images.jpg',
                    body: "Hey there! You've been notified!, Hey there! You've been notified!, Hey there! You've been notified!",
                });

                notification.onclick = function () {
                    alert("Notification event clicked");
                };
            }, 1000);
        }
    }
</script>