behaviorsubject

Is there a way to emit event in angular2 that can be listened to in entire application? Like we had in AngularJS using $rootScope.broadcast and emit . Can this same thing be achieved in angular2? I read about @Output() and EventEmitter() and implemented it but it restricts only the parent to listen to the event emmitted by child. I read about BehaviorSubject being one of the ways to do this. Is that the right approach? Any other solution for this? Günter Zöchbauer In Angular2 there is no global scope. There are only components and services. With services you can define their scope by the place

Hi I am new to angular 2+, I am trying to share data between two components but the second component is not retrieving the data from the service, it gets an empty object. Service - using rxjs BehaviorSubject to keep the object import { BehaviorSubject } from 'rxjs/BehaviorSubject'; import { Observable } from 'rxjs/Observable'; @Injectable() export class PostsService { response: any = {}; private messageResponse = new BehaviorSubject(this.response); currentResponse = this.messageResponse.asObservable(); constructor(private http: Http) { } // Get all posts from the API getAllPosts() { return

I am using angular 4 for my app and I use behaviorSubject to communicate between component, everythings were working fine Here is my code: export class Globals { loadStudentsByClass: BehaviorSubject<string> = new BehaviorSubject<string>(null); } export class ClassComponent implements OnInit { selectNewClass() { console.log('About to select new class', this.selectedClass); this.globals.loadStudentsByClass.next(this.selectedClass); this.globals.changeClassBehavior.next(true); this.router.navigateByUrl(''); } } export class StudentComponent implements OnInit { this.globals.loadStudentsByClass

My Service code looks like below - DataService @Injectable() export class DataService { ... private serviceRequestDtoSource = new BehaviorSubject<ServiceRequestDto>(null); serviceRequestDto$ = this.serviceRequestDtoSource.asObservable(); ... getAccountInfo(serviceRequestDto : ServiceRequestDto){ let body = JSON.stringify(serviceRequestDto); let headers = new Headers({ 'Content-Type': 'application/json' }); let options = new RequestOptions({ headers: headers }); console.log("In data service.getAccountInfo"); this.http .post(this.clientAccountInfoURL, body, options) .map((response : Response) =>

I use BehaviorSubject in my Angular app and I get observable to my Details component from DataService as shown below: DataService.ts: export class DataService { private messageTracker = new BehaviorSubject<any>(); private fileTracker = new BehaviorSubject<any>(); getMessageTracker(): Observable<any> { return this.messageTracker.asObservable(); } getFileTracker(): Observable<any> { return this.fileTracker.asObservable(); } //set methods omitted for brevity } DetailComponent : export class DetailComponent implements OnInit { subscription; //??? Can I use this variable for every subscription