js触发angular请求

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private apiUrl = 'https://api.example.com/data';

  constructor(private http: HttpClient) {}

  getData(): Observable<any> {
    return this.http.get(this.apiUrl);
  }

  postData(data: any): Observable<any> {
    return this.http.post(this.apiUrl, data);
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-data-component',
  template: `<div>{{ data | json }}</div>`
})
export class DataComponent implements OnInit {
  data: any;

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getData().subscribe(response => {
      this.data = response;
    });
  }
}