create routs in flutter

flutter router

static const String routeName = '/LogInScreen';


  static Route route() {
    return PageRouteBuilder(
      settings: RouteSettings(name: routeName),
      pageBuilder: (context, animation, secondaryAnimation) => LogInScreen(),
      transitionsBuilder: (context, animation, secondaryAnimation, child) {
        const begin = Offset(1.0, 0.0);
        const end = Offset.zero;
        final tween = Tween(begin: begin, end: end);
        final offsetAnimation = animation.drive(tween);
        return SlideTransition(
          position: offsetAnimation,
          child: child,
        );
      },
    );
  }
  
  //-----------------------------------------------------

class AppRouter {
  static Route? onGenerateRoute(RouteSettings settings) {
    SharedPreferenceHelper? preferenceHelper = SharedPreferenceHelper();
    dev.log("This is route: ${settings.name}");
    switch (settings.name) {
      case '/':
        return SplashScreen.route();
      case LogInScreen.routeName:
        return LogInScreen.route(); //LogInScreen.route();
      default:
        return _errorRoute();
    }
  }

  static Route _errorRoute() {
    return MaterialPageRoute(
        settings: RouteSettings(name: "/error"),
        builder: (_) => Scaffold(
              appBar: AppBar(title: Text("Error")),
            ));
  }
}