loan-amount.directive.ts

import { Directive } from '@angular/core';
import { AbstractControl, NG_VALIDATORS, ValidationErrors, Validator } from '@angular/forms';
import { LoanAmountValidatorService } from './loan-amount-validator.service';

@Directive({
  selector: '[razrooLoanAmount]',
  providers: [{ provide: NG_VALIDATORS, useExisting: LoanAmountDirective, multi: true }]
})
export class LoanAmountDirective implements Validator {
  constructor(private loanAmountValidatorService: LoanAmountValidatorService) {}

  validate(control: AbstractControl): ValidationErrors {
    return this.loanAmountValidatorService.loanAmountValidator(control)
  }

}