Angular- Auth Guard

angular-auth-guard.ts

@Injectable({
  providedIn: 'root'
})

export class AuthGuard implements CanActivate {

  constructor(
    private readonly router: Router) {
  }

  canActivate(): Observable<boolean> | Promise<boolean> | boolean {
    if (this.isLoggedIn) {
      return true;
    }

    this.router.navigate([Routes.Login]);
    return false;
  }
    
  get isLoggedIn(): boolean {
    if (localStorage.getItem(AuthConstants.UserKey) !== null) {
      return true;
    }
  }
}