fx-event-emitter

Cross-module communication in a Flutter app is handled using a global event bus that decouples modules and avoids callback chains. A singleton emitter publishes strongly-typed events across features, allowing UI actions and navigation triggers to coordinate without direct dependencies.

A typed event bus in Dart is a centralized mechanism that enforces a shared event model to carry payload data between components. It modularizes architecture by allowing separate features to emit and listen for strongly-typed events without knowing each other's internal implementation details.

To prevent memory leaks when subscribing to global events in Flutter widgets, use app-shell level listeners with proper lifecycle management. An optional mixin can streamline subscription setup in widgets, ensuring that listeners are safely disposed of during the widget lifecycle.

Yes, the global event bus supports request/response style workflows in Dart through optional AsyncFxEvent patterns. This allows modules to handle asynchronous operations and emit responses across the app while maintaining the decoupled modular architecture.

The best way to trigger UI updates from a separate feature module in Flutter is emitting a cross-module event from the source module. The app shell listens for the corresponding handler and triggers the necessary UI updates, maintaining complete feature decoupling.