What causes the “control.registerOnChange is not a function” error

Question

I have a form using the reactive form approach. The form is created as follow in my pug:

form([formGroup]=\'form\', novalidate=\'\', (ngSubmit)=\'postSurvey(         


        

Answer 1

I have also encountered this error when mixing template driven with reactive driven approaches (by mistake):

inputCtrl was properly defined in the component. Of course, #inputCtrl must be scrapped in order to work (it was hard to see when input had about 10 attributes).