在Angular中比较自定义验证器中的值

import { Validators } from '@angular/forms';

export function compareValidator(controlName1: string, controlName2: string) {
  return (formGroup: FormGroup) => {
    const control1 = formGroup.controls[controlName1];
    const control2 = formGroup.controls[controlName2];

    if (control2.errors && !control2.errors.compareValidator) {
      // 如果已经存在其他验证错误，则直接返回
      return;
    }

    if (control1.value !== control2.value) {
      // 如果两个值不相等，则设置验证错误
      control2.setErrors({ compareValidator: true });
    } else {
      // 如果两个值相等，则清除验证错误
      control2.setErrors(null);
    }
  };
}

this.formGroup = this.formBuilder.group({
  password: ['', [Validators.required]],
  confirmPassword: ['', [Validators.required]],
}, { validator: compareValidator('password', 'confirmPassword') });