在valueChanges上更新reactive-forms中的字段

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

@Component({
  selector: 'app-form',
  template: `
    <form [formGroup]="myForm">
      <input formControlName="name" placeholder="Name">
    </form>
  `,
})
export class FormComponent implements OnInit {
  myForm: FormGroup;

  ngOnInit() {
    this.myForm = new FormGroup({
      name: new FormControl(''),
    });

    this.myForm.get('name').valueChanges.subscribe((value) => {
      // 在这里可以执行更新字段的操作
      console.log('字段值变化：', value);
    });
  }
}