在api上提交表单的post方法

Question

角 8 上有一个表格我的form.component.html<div class="container"><form novalidate [formGroup]="registrationForm">    <div class="form-group">        <label for="firstName">Имя:</label>        <input #spy required pattern=[A-Za-zА-Яа-яЁё]{2,} name="firstName" id="firstName" type="text" class="form-control" formControlName="firstName">    </div>    <div class="form-group">        <label for="lastName">Фамилия:</label>        <input #spy required pattern=[A-Za-zА-Яа-яЁё]{2,} name="lastName" id="lastName" type="text" class="form-control" formControlName="lastName">    </div>    <div class="form-group">        <label for="email">E-mail:</label>        <input #spy required email name="email" id="email" type="email" class="form-control" formControlName="email">    </div>    <!--{{ spy.className }}-->    <button type="submit" class="btn btn-succes" (click)="submit(myForm)">Отправить</button></form>当用户写入数据时，提交按钮应使用 POST 方法向 API 发送数据。如果您需要任何代码，请发表评论ts 代码：import { FormGroup, FormControl } from '@angular/forms';import {HttpClient} from '@angular/common/http';@Component({  selector: 'app-my-form',  templateUrl: './my-form.component.html',  styleUrls: ['./my-form.component.css']})export class MyFormComponent implements OnInit {  registrationForm: FormGroup;  constructor() { }  ngOnInit() {    this.registrationForm = new FormGroup({      firstName: new FormControl(),      lastName: new FormControl(),      email: new FormControl()    });  }}```