bad_drawer.dart

import 'package:flutter/material.dart';

void main() => runApp(
      MaterialApp(
        theme: ThemeData(
          pageTransitionsTheme: const PageTransitionsTheme(builders: {
            TargetPlatform.android: CupertinoPageTransitionsBuilder(),
            TargetPlatform.windows: CupertinoPageTransitionsBuilder(),
            TargetPlatform.macOS: CupertinoPageTransitionsBuilder(),
            TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
            TargetPlatform.linux: CupertinoPageTransitionsBuilder(),
          }),
        ),
        routes: <String, WidgetBuilder>{
          '/': (context) => Scaffold(
                appBar: AppBar(),
                body: const Center(
                  child: Text('Page 1'),
                ),
                drawer: Drawer(
                  backgroundColor: Colors.red,
                  child: ListView(
                    children: <Widget>[
                      TextButton(
                        child: const Text('Nav home'),
                        onPressed: () {},
                      ),
                      TextButton(
                        child: const Text('Nav to Page 2'),
                        onPressed: () {
                          Navigator.of(context).pushNamed('/2');
                        },
                      ),
                    ],
                  ),
                ),
              ),
          '/2': (context) => Scaffold(
                appBar: AppBar(),
                body: const Center(
                  child: Text('Page 2'),
                ),
                drawer: Drawer(
                  backgroundColor: Colors.red,
                  child: ListView(
                    children: <Widget>[
                      TextButton(
                        child: const Text('Nav home'),
                        onPressed: () async {
                          Navigator.of(context).pop();
                          Navigator.of(context).pop();
                        },
                      ),
                      TextButton(
                        child: const Text('Nav to Page 2'),
                        onPressed: () {},
                      ),
                    ],
                  ),
                ),
              ),
        },
      ),
    );