Multiple Validators for the same input field.

[phixMe]

I believe that it would be very useful to have a note about multiple validators for the same field.

I was able to accomplish this with:

this.myForm = fb.group({
  'cardNumber': new FormControl('', Validators.compose([Validators.required, CustomValidators.creditCard]))
});

[alvirtuoso]

@phixMe I agree that this is missing in the documentation. In addition, the view is like this

<input type="text" formControlName="cardNumber" placeholder="cardNumber"/>
<p *ngIf="myForm.controls.cardNumber.errors?.creditCard || myForm.controls.cardNumber.errors?.required">invalid card</p>

Validation works but the ngIf doesn't