--- /dev/null
+import { Injectable } from '@angular/core';
+
+@Injectable({
+ providedIn: 'root'
+})
+export class MessageService {
+
+ messages : string[] = [];
+
+ add(message : string): void {
+ this.messages.push(message);
+ }
+
+ clear(): void {
+ this.messages = [];
+ }
+}