dependencies:
  go_router: ^12.0.0

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

void main() {
  runApp(MyApp());
}

final GoRouter _router = GoRouter(
  routes: [
    GoRoute(
      path: '/',
      builder: (context, state) => HomePage(),
    ),
    GoRoute(
      path: '/about',
      builder: (context, state) => AboutPage(),
    ),
  ],
);

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      routerConfig: _router,
    );
  }
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Home')),
      body: Center(
        child: ElevatedButton(
          onPressed: () => context.go('/about'),
          child: Text('ไปหน้า About'),
        ),
      ),
    );
  }
}

class AboutPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('About')),
      body: Center(child: Text('นี่คือหน้าข้อมูล')),
    );
  }
}