[Vuejs]-Vuejs notification plugin

try this:

Vue.mixin(
    {
        data: function ()
        {
            return {
                    notificationStore: NotificationStore
            };
        },
        methods:
        {
            notify(notification)
            {
                this.notificationStore.notify(notification);
            }
        }
    });

instead:

Vue.mixin(
    {
        data: function ()
        {
            var data =
                {
                    notificationStore: NotificationStore
                };

            return data;
        },
        methods:
        {
            notify(notification)
            {
                this.notificationStore.notify(notification);
            }
        }
    });

I tried to reply your code working and if dont use return {} without break line anfter return, then doesn’t work.