fix(angular): es6 build (#16207)

fixes #15979
ionic-team · Nov 3, 2018 · a981116 · a981116
1 parent d817cc3
commit a981116
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Showing 3 changed files with 34 additions and 31 deletions.
diff --git a/angular/src/providers/platform.ts b/angular/src/providers/platform.ts
@@ -4,6 +4,9 @@ import { proxyEvent } from '../util/util';
 
 
 export class BackButtonEmitter extends EventEmitter<BackButtonDetail> {
+  constructor() {
+    super();
+  }
   subscribeWithPriority(priority: number, callback: () => Promise<any> | void) {
     return this.subscribe((ev: BackButtonDetail) => {
       ev.register(priority, callback);