$setPristine(); Sets the form to its pristine state. This method can be called to remove the 'ng-dirty' class and set the form

$error Object Is

$valid boolean True

$commitViewValue(); Commit all form controls pending updates to the $modelValue. Updates may be pending by a debounced

$setDirty(); Sets the form to a dirty state. This method can be called to add the 'ng-dirty' class and set the form to a dirty

$removeControl(control); Deregister a control from the form. Input elements using ngModelController do this automatically when