I create a custom form control with validation as described here in this blog. The component is working and see the validation is applied to the component selector itself. I want the ng-invalid to be applied to the HTML element inside that component. I see this problem already described in this question.
A possible solution would be to intercept the event when the ngClass is changed, so it can be removed from the parent selector tag and add to the child element in the control.
How can I intercept the event that modify the property ngClass in the component?