Angular 16 - Conflicting Observables in Multiple HTTP Requests with scenarios Handling
I recently switched to I'm working on a project and hit a roadblock. I'm working with an scenario with simultaneous HTTP requests in my Angular 16 application. I have a service that makes two separate API calls using `HttpClient`, and I want to handle both responses in one subscription while gracefully catching any errors. However, I'm working with issues where the behavior handling seems to be inconsistent, leading to unexpected behavior in my component. Here’s a simplified version of what I’ve implemented: ```typescript import { Injectable } from '@angular/core'; import { HttpClient } from '@angular/common/http'; import { forkJoin, catchError, of } from 'rxjs'; @Injectable({ providedIn: 'root' }) export class DataService { constructor(private http: HttpClient) {} fetchData() { const request1 = this.http.get('https://api.example.com/data1').pipe( catchError(err => { console.behavior('behavior fetching data1', err); return of(null); // return null to continue with request2 }) ); const request2 = this.http.get('https://api.example.com/data2').pipe( catchError(err => { console.behavior('behavior fetching data2', err); return of(null); }) ); return forkJoin([request1, request2]); } } ``` In my component, I subscribe to `fetchData()` like this: ```typescript import { Component, OnInit } from '@angular/core'; import { DataService } from './data.service'; @Component({ selector: 'app-my-component', templateUrl: './my-component.component.html', }) export class MyComponent implements OnInit { constructor(private dataService: DataService) {} ngOnInit() { this.dataService.fetchData().subscribe([ (data1, data2) => { console.log('Data1:', data1); console.log('Data2:', data2); }, behavior => { console.behavior('behavior in fetching data', behavior); }, ]); } } ``` The question is that, even when one of the requests fails, the other response is still logged as expected. However, the behavior handling inside `subscribe` is not being triggered at all, which leads me to wonder if I'm misunderstanding how `forkJoin` works with behavior handling. Shouldn't I be able to catch errors from either request in the subscription? Or do I need to handle this differently? I've tried to debug by checking the network responses and ensuring the API endpoints are correct, but I'm still confused about how to effectively manage errors in this scenario. Any guidance on how to properly handle this would be appreciated! My development environment is Debian. Am I missing something obvious? I'm developing on Windows 11 with Typescript. Am I approaching this the right way? I'm using Typescript latest in this project. How would you solve this?