Angular 17+ Guide: Signals, Standalone, and RxJS

import { signal, computed } from '@angular/core';

@Component({
  standalone: true,
})
export class AppComponent {
  count = signal(0);
  doubleCount = computed(() => this.count() * 2);
}

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