In Angular, how to add Validator to FormControl after control is created?

Question

We have a component that has a dynamically built form. The code to add a control with validators might look like this:

var c = new FormControl(\'\', Validato         


        

Answer 1

To add onto what @Delosdos has posted.

Set a validator for a control in the FormGroup: this.myForm.controls['controlName'].setValidators([Validators.required])

Remove the validator from the control in the FormGroup: this.myForm.controls['controlName'].clearValidators()

Update the FormGroup once you have run either of the above lines. this.myForm.controls['controlName'].updateValueAndValidity()

This is an amazing way to programmatically set your form validation.