Angular 11如何使用反应式表单验证confirmPassword与密码相同

import { FormBuilder, FormGroup, Validators, FormControl } from '@angular/forms';

myForm: FormGroup;

ngOnInit() {
  this.myForm = this.formBuilder.group({
    password: ['', Validators.required],
    confirmPassword: ['', Validators.required]
  }, { validators: this.passwordMatchValidator });
}

passwordMatchValidator(formGroup: FormGroup) {
  const password = formGroup.get('password').value;
  const confirmPassword = formGroup.get('confirmPassword').value;
  
  if (password !== confirmPassword) {
    formGroup.get('confirmPassword').setErrors({ passwordMismatch: true });
  } else {
    formGroup.get('confirmPassword').setErrors(null);
  }
}

<form [formGroup]="myForm">
  <div>
    <label for="password">Password</label>
    <input type="password" id="password" formControlName="password">
  </div>
  <div>
    <label for="confirmPassword">Confirm Password</label>
    <input type="password" id="confirmPassword" formControlName="confirmPassword">
    <div *ngIf="myForm.hasError('passwordMismatch') && myForm.get('confirmPassword').dirty">
      Password and Confirm Password do not match.
    </div>
  </div>
</form>