如何在TypeScript(Angular 4)中从API动态下载/设置值？

npm install @angular/common@latest @angular/compiler@latest @angular/core@latest @angular/forms@latest @angular/platform-browser@latest @angular/platform-browser-dynamic@latest @angular/router@latest @angular/animations@latest --save

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

constructor(private http: HttpClient) { }

getData() {
  this.http.get('api_url').subscribe(data => {
    // 处理获取到的数据
  });
}

postData() {
  const data = { key: 'value' };
  this.http.post('api_url', data).subscribe(response => {
    // 处理响应
  });
}