If not NgRx, what would you use instead?

If you do not use NgRx for state management in an Angular application, you can consider the following alternatives:

• RxJS with services: use BehaviorSubject or ReplaySubject inside Angular services to store and propagate state.
• Akita: a lightweight state management library with a simple API and reactive approach.
• NgXs: a simpler and more declarative state manager than NgRx.
• Redux: a classic approach that can be integrated with Angular but requires additional setup.
• Simple local component state: if the application is small, you can manage state within components and pass data via Input/Output.

Example of using BehaviorSubject for state:

import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';

@Injectable({ providedIn: 'root' })
export class CounterService {
  private countSubject = new BehaviorSubject<number>(0);
  count$ = this.countSubject.asObservable();

  increment() {
    this.countSubject.next(this.countSubject.value + 1);
  }

  decrement() {
    this.countSubject.next(this.countSubject.value - 1);
  }
}