<div class="form-field">
<label>Confirm Password: </label>
<input type="text" formControlName="confirm" [(ngModel)]="signup.confirm" name="confrim">
<div *ngIf="!signupForm.valid">
<span *ngIf="signupForm.get('confirm').hasError('confirmPassword') && signupForm.get('confirm').touched">
{{signupForm.get('confirm').errors?.confirmPassword.message}}
</span>
<span *ngIf="signupForm.get('confirm').hasError('required') && signupForm.get('confirm').dirty">This field is requred</span>
</div>
</div>
'signupForm' is a formGroup.
we can use 'hasError' & 'get()' methods to write the code.