ems-web-app-messages/lib/messages.interfaces.d.ts

This angular.io module includes a component and service that can be used to render "Growl" or "Snackbar" style in-app messages.

import { TemplateRef } from '@angular/core';
import { MessageType, MessagePosition } from "./messages.enums";
export interface IMessage {
    type: MessageType;
    message?: string;
    template?: TemplateRef<any>;
    duration: number;
    classes?: string;
    position: MessagePosition;
}