How does AngularJS handle large-scale frontend event bus architecture design?

AngularJS implements event bus architecture using $rootScope, custom services, or pub-sub patterns.

Event bus architecture decouples components by allowing communication through centralized event channels. In AngularJS, $rootScope acts as a global event bus, but enterprise systems often wrap this into custom pub-sub services to avoid tight coupling. While powerful, excessive event usage can make debugging difficult and create hidden dependencies.