Field validator (without Form)


I’m not 100% sure I implemented my field validator (without form) correctly (using Ionic 2 RC.1).

Do someone see a mistake there?

In my ts file:

 telFormGroup: FormGroup;

 constructor(private formBuilder: FormBuilder) {
      this.telFormGroup = new FormGroup({
        'telValidator': new FormControl('', Validators.required)     

In my html file:

<ion-list [formGroup]="telFormGroup">
        <ion-icon name="call" item-left></ion-icon>
        <ion-input type="tel" [(ngModel)]="myTelNumber" formControlName="telValidator"></ion-input>

        <ion-textarea rows="6" [(ngModel)]="anotherFieldIDontWantToValidate" [ngModelOptions]="{standalone: true}"></ion-textarea>

Seems to be ok because when I empty or fill the field I see the classes “ng-valid” and “ng-invalid” changing on it … but I didn’t found a clear tutorial article about that, just wanted to be sure I didn’t built something wrong or with a bad practice.

Thx in advance for your feedback