flutter-implementing-navigation-and-routing

Use Navigator.push with a MaterialPageRoute or CupertinoPageRoute to move to a new screen, and Navigator.pop to return. Pass data through the destination widget's constructor and return values via Navigator.pop(context, result).

Use the imperative Navigator for small apps without deep linking needs. Use the declarative Router API, typically via the go_router package, when you need deep linking, web URL synchronization, or complex routing behavior.

Add the go_router package, switch MaterialApp to MaterialApp.router, and define a GoRouter configuration mapping URL paths to routes. Navigate with context.go() or context.push() instead of Navigator.push.

Named routes via MaterialApp.routes and Navigator.pushNamed have rigid deep linking behavior and do not support the browser forward button. The recommended approach is a routing package like go_router for declarative navigation.

Wrap the host widget in a PopScope with canPop set to false and use onPopInvokedWithResult to intercept back presses. Control the nested Navigator through a GlobalKey<NavigatorState> so the top-level navigator does not pop the entire flow.