如何在angular中将json dynamic写入本地json

import { HttpClient } from '@angular/common/http';

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

import { Observable } from 'rxjs';

// ...

getData(): Observable<any> {
  return this.http.get<any>('assets/data.json');
}

import { Observable } from 'rxjs';

// ...

writeData(data: any): Observable<any> {
  return this.http.put<any>('assets/data.json', data);
}

import { JsonService } from 'path-to-json-service';
import { Subscription } from 'rxjs';

// ...

export class MyComponent implements OnInit, OnDestroy {
  data: any;
  private subscription: Subscription;

  constructor(private jsonService: JsonService) { }

  ngOnInit() {
    this.subscription = this.jsonService.getData().subscribe(data => {
      this.data = data;
    });
  }

  ngOnDestroy() {
    this.subscription.unsubscribe();
  }
}

import { JsonService } from 'path-to-json-service';

// ...

export class MyComponent {
  constructor(private jsonService: JsonService) { }

  writeJsonData() {
    const dynamicData = { /* 动态JSON数据 */ };
    this.jsonService.writeData(dynamicData).subscribe(response => {
      console.log('JSON数据写入成功');
    });
  }
}