How can controllers in Angular communicate with each other?

Question

Angular

I have 2 controllers, navigation and content. The handler functions for the menu buttons are described in the first controller, the data is replaced and output to the {{ }} labels in the second controller. How can I pass data from controller to controller if the click event is handled in the first controller?

Answer 1

Data is stored in services.
Controllers are the link between services and user events.
And this applies not only to angular.

Answer 2

As an option, through the binding of model properties with change tracking.