在Angular 11中获得API响应之前，将执行下几行代码

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

@Injectable()
export class ApiService {
  constructor(private http: HttpClient) { }
  
  // 定义发送API请求的方法
  getApiResponse(url: string) {
    return this.http.get(url);
  }
}

import { Component } from '@angular/core';
import { ApiService } from './api.service';

@Component({
  selector: 'app-root',
  template: `
    <button (click)="getApiData()">获取API响应</button>
    <div>{{ apiResponse }}</div>
  `,
})
export class AppComponent {
  apiResponse: any;

  constructor(private apiService: ApiService) { }

  getApiData() {
    const apiUrl = 'https://api.example.com/data'; // 替换为实际的API地址
    this.apiService.getApiResponse(apiUrl).subscribe((response) => {
      this.apiResponse = response;
    });
  }
}