在Angular中实现自定义验证器时失败

如何解决在Angular中实现自定义验证器时失败

我试图实现一个自定义验证器，该验证器检查我的两个新密码字段是否匹配，如果不匹配则抛出错误。这就是所有功能。 我收到以下错误：

Argument of type '{ validator: (formGroup: FormGroup) => void; }' is not assignable to parameter of type 'ValidatorFn | ValidatorFn[] | AbstractControlOptions'.
  Object literal may only specify kNown properties,and 'validator' does not exist in type 'ValidatorFn | ValidatorFn[] | AbstractControlOptions'.

我的代码是：

profileForm = new FormGroup({
    firstname: new FormControl('',[Validators.required]),currentPassword: new FormControl('',newPassword: new FormControl('',repeatPassword: new FormControl('',[Validators.required])
  },{
    validator: ConfirmedValidator('newPassword','repeatPassword')
  });

validator.ts的内容：

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

export function ConfirmedValidator(controlName: string,matchingControlName: string){
return (formGroup: FormGroup) => {
        const control = formGroup.controls[controlName];
        const matchingControl = formGroup.controls[matchingControlName];
        if (matchingControl.errors && !matchingControl.errors.confirmedValidator) {
            return;
        }
        if (control.value !== matchingControl.value) {
            matchingControl.setErrors({ confirmedValidator: true });
        } else {
            matchingControl.setErrors(null);
        }
    }
}