Angular reactive表单以编程方式提交，不使用按钮

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';

export class MyFormComponent implements OnInit {
  myForm: FormGroup;

  constructor(private formBuilder: FormBuilder) { }

  ngOnInit() {
    this.myForm = this.formBuilder.group({
      name: ['', Validators.required],
      email: ['', [Validators.required, Validators.email]],
      message: ['', Validators.required]
    });
  }
}

<form [formGroup]="myForm" (ngSubmit)="onSubmit()">
  <div>
    <label for="name">Name:</label>
    <input type="text" id="name" formControlName="name">
  </div>
  <div>
    <label for="email">Email:</label>
    <input type="email" id="email" formControlName="email">
  </div>
  <div>
    <label for="message">Message:</label>
    <textarea id="message" formControlName="message"></textarea>
  </div>
  <button type="submit">Submit</button>
</form>

export class MyFormComponent implements OnInit {
  // ...

  onSubmit() {
    if (this.myForm.valid) {
      // 表单验证通过，可以进行提交操作
      console.log(this.myForm.value);
      // 在这里可以编写提交表单的逻辑
    }
  }
}