NotificationFixed.ts

var source = new EventSource("https://localhost/notifications");
var notification = document.getElementById("notification-count");

source.onmessage = event => {
                const count = event.data;

                if(notification){
                  notification.style.visibility = count > 0 ? "visible" : "hidden";
                }

                this.updateCount(count);
            };

source.onerror = error => {
                console.log("Notification error", error);
                if(notification){
                  notification.style.visibility = "hidden";
                }
            }