new Notification 桌面 通知

if (!message.touser) {
                $("#sound").attr('src', "https://taibao-image.ecdpower.net/shtlc/chat/msg.mp3");
                Notification.requestPermission(function (permission) {
                    var notification = new Notification("最新消息", { body: message.content, icon: '', dir: 'auto' });
                    setTimeout(function () {
                        notification.close();//关闭桌面通知  
                    }, 5000);
                })
            }
return;