Exploring the integration of multiple HTTP requests in Angular with the power of RxJS

Is there a way to make multiple HTTP calls simultaneously in an Angular service and then combine the responses into one object using RxJS?

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
   providedIn: 'root'
})
export class DataService {
   constructor(private http: HttpClient) {}

   getData1(): Observable<any> {
     return this.http.get('https://api.example.com/data1');
   }

   getData2(): Observable<any> {
     return this.http.get('https://api.example.com/data2');
   }
}

Answer №1

Utilizing forkJoin

fetchData(): Observable<any> {
     return forkJoin([this.retrieveData1(), this.retrieveData2()]);
   }
mergeData() {
    this.dataConnector.fetchData().subscribe((responses) => {
      const [data1, data2] = responses;
    });

Using concatMap: Employing concatMap for sequential HTTP requests and merging their outcomes together. This approach ensures calls are executed sequentially.

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