从一个同级组件到其他angular组件的调用模式

@Input() data: any;

<target-component [data]="someData"></target-component>

@Output() dataEvent: EventEmitter<any> = new EventEmitter<any>();

triggerEvent() {
  this.dataEvent.emit(someData);
}

<target-component (dataEvent)="handleData($event)"></target-component>

@Injectable()
export class DataService {
  private data: any;

  setData(data: any) {
    this.data = data;
  }

  getData() {
    return this.data;
  }
}

constructor(private dataService: DataService) {}

setData() {
  this.dataService.setData(someData);
}

constructor(private dataService: DataService) {}

getData() {
  const data = this.dataService.getData();
}