Pop and push demo

main.dart

/*
 * Pop and Push Demo
 * https://gist.github.com/PlugFox/52c08d44d4074d37c236528b058eedd7
 * https://dartpad.dev?id=52c08d44d4074d37c236528b058eedd7
 * Mike Matiunin <plugfox@gmail.com>, 13 January 2026
 */

import 'dart:async';

import 'package:flutter/material.dart';

void main() => runZonedGuarded<void>(
      () => runApp(const App()),
      (error, stackTrace) => print('Top level exception: $error'), // ignore: avoid_print
    );

class App extends StatelessWidget {
  const App({super.key});

  @override
  Widget build(BuildContext context) => MaterialApp(
        title: 'Pop and Push Demo',
        home: Builder(
          builder: (context) => Scaffold(
            appBar: AppBar(
              title: const Text('Home'),
            ),
            body: SafeArea(
              child: Center(
                child: ElevatedButton(
                  onPressed: () => Navigator.maybeOf(context)
                    ?..push(
                      MaterialPageRoute<void>(
                        builder: (context) => const A(),
                      ),
                    ),
                  child: const Text('Go to A'), // The onPressed is set in the A widget.
                ),
              ),
            ),
          ),
        ),
      );
}

class A extends StatelessWidget {
  const A({
    super.key,
  });

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: const Text('A'),
        ),
        body: SafeArea(
          child: Center(
            child: ElevatedButton(
                child: const Text('Go to B'),
                onPressed: () {
                  Navigator.maybeOf(context)
                    ?..popUntil((route) => route.isFirst)
                    ..push(
                      MaterialPageRoute<void>(
                        builder: (context) => const B(),
                      ),
                    );
                }),
          ),
        ),
      );
}

class B extends StatelessWidget {
  const B({
    super.key,
  });

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: const Text('B'),
        ),
        body: SafeArea(
          child: Center(
            child: ElevatedButton(
                child: const Text('Go to A'),
                onPressed: () {
                  Navigator.maybeOf(context)
                    ?..popUntil((route) => route.isFirst)
                    ..push(
                      MaterialPageRoute<void>(
                        builder: (context) => const A(),
                      ),
                    );
                }),
          ),
        ),
      );
}