observable mean in angular
Observable in Angular is a feature that provides support for delivering messages between different parts of your single-page application constructor(private http:HttpClient) { } getUsers():Observable<User[]>{ return this.http.get<User[]>(this.baseUrl+'users'); }
Source: www.javatpoint.com
return observable from function angular
1. Better practise is to use Observable: import { catchError } from 'rxjs/operators'; import { throwError } from 'rxjs'; bbb() { return this.http.get(this.url) .pipe( catchError(err => { console.log('err', err); return throwError('Something bad happened; please try again later.'); }); } 2. And, then simply just subscribe to bbb: import { Subscription } from 'rxjs'; testSubscription: Subscription; ngAfterContentInit() { this.testSubscription = this.bbb() .subscribe(son => { console.log('son', son); // here you get the result }); } 3. Don't forget to unsubscribe: ngOnDestroy() { this.testSubscription.unsubscribe(); }
what is observable in angular
Observable in Angular is a feature that provides support for delivering messages between different parts of your single-page application. This feature is frequently used in Angular because it is responsible for handling multiple values, asynchronous programming in Javascript, and also event handling processes.
Source: www.javatpoint.com
display observable in html angular
<!--.html file- use '|async' pipe --> <ul class="" scope="row" *ngFor="let aboutus of this.pageData |async " > <li>{{aboutus.key}} {{aboutus.data.details}} </li> </ul>