import {AbstractControl} from '@angular/forms'; export class PasswordValidation { static MatchPassword(AC: AbstractControl) { let password = AC.get('password').value; // to get value in input tag let confirmPassword = AC.get('confirmPassword').value; // to get value in input tag if (password != confirmPassword) { console.log('false'); AC.get('confirmPassword').setErrors({ MatchPassword: true }) } else { console.log('true'); return null } } }