web notification

notification.js

    var socket_lottery_io = io.connect(location.origin + ':3033');

    socket_lottery_io.on('lotteryNotification', function(data) {
        setLotteryNotification(data);
    });

    function setLotteryNotification(data) {
        Notification.requestPermission(function(status) {
            if (status === 'granted') {

                var notification = new Notification(data.lottery.title);

                notification.onshow = function() {
                    setTimeout(function() {
                        notification.close();
                    }, 3000);
                }

                notification.onclick = function(event) {
                    event.preventDefault();
                    window.open(data.url, '_blank');
                }
            }
        });
    }