Angular 2 eventEmitter不起作用

Question

All did well as in the manual, here's the code:
WebSocketBroadcaster

import {EventEmitter, Injectable} from "@angular/core";

@Injectable()
export class WebSocketBroadcaster {
    ee: EventEmitter<any> = new EventEmitter<any>();
}

WebSocketService code

bootstrap

bootstrap(AppComponent, [
    appRouterProviders,
    disableDeprecatedForms(),
    provideForms(),
    WebSocketBroadcaster
])

client component code

console.log(data) in client.component does not work
console.log(this.broadcaster.ee); output

Answer 1

EventEmitter are not supposed to be used in services. EventEmitter is only for @Output() properties in components.

In services use Observable and Subject instead.