How to get FormControl instance from ControlValueAccessor

Question

I\'ve the following component:

@Component({
    selector: \'pc-radio-button\',
    templateUrl: \'./radio-button.component.html\',
    providers: [
        {         


        

Answer 1

It looks like injector.get(NgControl) is throwing a deprecation warning, so I wanted to chime in with another solution:

constructor(public ngControl: NgControl) {
  ngControl.valueAccessor = this;
}

The trick is to also remove NG_VALUE_ACCESSOR from the providers array otherwise you get a circular dependency.

More information about this is in this talk by Kara Erickson of the Angular team.