如何在formBuilder Angular中添加条件验证器

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

myForm: FormGroup;

constructor(private formBuilder: FormBuilder) {
  this.myForm = this.formBuilder.group({
    // 添加表单控件和验证器
    name: ['', Validators.required],
    email: ['', [Validators.required, Validators.email]],
    age: ['', Validators.min(18)],
    // 其他表单控件...
  });
}

ngOnInit() {
  this.myForm.get('option').valueChanges.subscribe(option => {
    const conditionalControl = this.myForm.get('conditionalField');
    if (option === 'someValue') {
      conditionalControl.setValidators([Validators.required]);
    } else {
      conditionalControl.clearValidators();
    }
    conditionalControl.updateValueAndValidity();
  });
}