Notify or call some methods on the angular app

I want to Notify or call some methods on the angular app to refresh a grid when user selects a particular response for a particular question.(usecase-> we are trying to achieve an approval workflow. we will ask user a bunch of questions and once he answers them we also allow him to approve from a list shown. Once he approves we want to refresh the angular grid in background. we area using version9.1). Please let us know how to do this.

Hi Team, any update on my query ?