Angular 7:如何使用JSONP获取对象列表

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

@NgModule({
  imports: [
    HttpClientModule
  ],
  // ...
})
export class AppModule { }

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

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

  getObjectList(url: string): Observable<any> {
    return this.http.jsonp(url, 'callback');
  }
}

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

@Component({
  selector: 'app-object-list',
  template: `
    <ul>
      <li *ngFor="let obj of objectList">{{ obj.name }}</li>
    </ul>
  `
})
export class ObjectListComponent {
  objectList: any[];

  constructor(private dataService: DataService) { }

  ngOnInit() {
    const url = 'https://example.com/api/objects?callback=JSONP_CALLBACK';
    this.dataService.getObjectList(url).subscribe(data => {
      this.objectList = data;
    });
  }
}