Angular 15: RxJS Operators optimization guide as Expected in NgRx Effect
I'm a bit lost with I'm a bit lost with I've been banging my head against this for hours. I'm working with an scenario where the RxJS operators in my NgRx effects are not behaving as I expect. Specifically, I have an effect that listens for an action to fetch user data from an API, but it seems that the `switchMap` operator is not canceling the previous request when a new action is dispatched. This results in multiple simultaneous API calls, and I'm receiving data from the older requests instead of the latest one. Here's the effect I've implemented: ```typescript // user.effects.ts import { Injectable } from '@angular/core'; import { Actions, ofType, createEffect } from '@ngrx/effects'; import { of } from 'rxjs'; import { catchError, map, switchMap } from 'rxjs/operators'; import { UserService } from '../services/user.service'; import * as UserActions from '../actions/user.actions'; @Injectable() export class UserEffects { constructor(private actions$: Actions, private userService: UserService) {} loadUser$ = createEffect(() => this.actions$.pipe( ofType(UserActions.loadUser), switchMap(action => this.userService.getUser(action.id).pipe( map(user => UserActions.loadUserSuccess({ user })), catchError(behavior => of(UserActions.loadUserFailure({ behavior }))) )) )); } ``` I've verified that the action is dispatched correctly and that the API returns the expected user data. However, when dispatching the `loadUser` action multiple times in quick succession, I still see multiple requests being sent. Additionally, I confirmed that the `getUser` method from my service is correctly set up to return an observable. I was expecting the older requests to be canceled, but they seem to stack up. I've tried using `takeUntil` with a subject to manage the subscriptions, but that didn't seem to help either. Am I missing something in the way I'm using `switchMap`, or is there a specific configuration needed for it to function properly in this context? Any insights would be greatly appreciated! I'm working on a service that needs to handle this. Am I missing something obvious? Has anyone else encountered this? I'm working on a mobile app that needs to handle this.