validotors.ts

static passwordMatchValidator(control: AbstractControl) {
  const password: string = control.get('password').value; // get password from our password form control
  const confirmPassword: string = control.get('confirmPassword').value; // get password from our confirmPassword form control
  // compare is the password math
  if (password !== confirmPassword) {
    // if they don't match, set an error in our confirmPassword form control
    control.get('confirmPassword').setErrors({ NoPassswordMatch: true });
  }
}