Angular Reactive Programming

Version: Angular 21 (2025) Tags: Reactive, Observables, RxJS, BehaviorSubject

References: Reactive Guide • RxJS

Best Practices

• Use BehaviorSubject for state

@Injectable({ providedIn: 'root' })
export class StateService {
  private state = new BehaviorSubject<State>(initialState);
  state$ = this.state.asObservable();
  
  updateState(newState: Partial<State>) {
    this.state.next({ ...this.state.value, ...newState });