$.ajax({
        dataType: "json",
        url: "/notification/unreadnotificatons/",
        method: "GET",
        success: function (response) {
            if (response != null)
                filterForNew(response);
        }
    });

const connection = new signalR.HubConnectionBuilder()
        .withUrl("/notificationHub")
        .build();

    connection.start()
        .catch(err => console.error(err.toString()));