What is the difference between using navigator 1.0 vs navigator 2.0 ? why flutter brought navigator 2.0 ?

Navigator 1.0 vs Navigator 2.0

Navigator versions differ in complexity and control:

Navigator 1.0

Simple, imperative navigation:

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// Push route
Navigator.of(context).push(MaterialPageRoute(
  builder: (_) => DetailScreen(),
));

// Pop route
Navigator.of(context).pop();

// Push named route
Navigator.of(context).pushNamed('/detail');

Pros:

• Simple and intuitive
• Easy to learn
• Great for small apps

Cons:

• Limited deep linking
• Hard to handle back button
• State not preserved
• Difficult for complex flows

Navigator 2.0

Complex, declarative navigation:

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class MyNavigator extends StatefulWidget {
  @override
  _MyNavigatorState createState() => _MyNavigatorState();
}

class _MyNavigatorState extends State<MyNavigator> {
  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () async => !await _navigatorKey.currentState!.maybePop(),
      child: Navigator(
        pages: _pages,
        onPopPage: (route, result) {
          if (!route.didPop(result)) return false;
          _removeLastPage();
          return true;
        },
      ),
    );
  }
}

Pros:

• Full control over routes
• Deep linking support
• Browser back button handling
• Complex animations
• URL sync (web)

Cons:

• Complex boilerplate
• Steep learning curve
• Verbose code

Comparison

Recommendation

• Nav 1.0: Small/medium apps, simple flows
• Nav 2.0: Large apps, complex flows, web apps, deep linking
• Alternative: Use go_router (easier 2.0)

Modern: go_router simplifies Navigator 2.0.