Angular 发送两次 http 请求

标题：解决Angular中发生双重HTTP请求的问题

typescript
import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { take } from 'rxjs/operators';
@Component({
  selector: 'app-example',
  template: `
    
      发送请求
    
  `,
})
export class ExampleComponent implements OnInit {
  constructor(private http: HttpClient) {}
  ngOnInit() {}
  sendRequest() {
    this.http.get('https://api.example.com/data')
      .pipe(take(1))
      .subscribe(data => {
        // 处理获取到的数据
        console.log(data);
      });
  }
}