Introduction — Flutter for React Developers
You already know how to build UIs. You understand components, props, state, and the idea that the framework re-renders the tree when data changes. Flutter uses exactly the same declarative model — it just calls everything a widget instead of a component.
The payoff: a single Dart codebase that ships to iOS, Android, web, macOS, Windows, and Linux with native performance on every target. No React Native bridge, no Cordova WebView. Flutter compiles to native ARM code and draws every pixel itself using the Skia/Impeller graphics engine.
Why Flutter if you know React?
Section titled “Why Flutter if you know React?”| React | Flutter |
|---|---|
| One codebase → web | One codebase → iOS · Android · web · desktop |
| Virtual DOM diffing | Widget tree + RenderObject layer |
| Fast Refresh (hot reload) | Hot Reload (same idea, sub-second) |
npm / Vite / CRA | pub / flutter create / flutter run |
| JavaScript / TypeScript | Dart (sound null safety, strong types) |
| Styled-components / Tailwind | Widget properties + ThemeData (Material 3) |
The mental model transfer rate is high. Once you see that StatelessWidget.build() ≈ a React function component returning JSX, and that StatefulWidget ≈ a component with useState, the rest is learning Flutter’s widget vocabulary.
What this course covers
Section titled “What this course covers”- Introduction & Setup (this module) — Dart basics, toolchain, first app, mental model
- Widgets & UI — StatelessWidget, props, layout (Row/Column ≈ Flexbox), styling
- State & Lifecycle — StatefulWidget,
setState, Riverpod (≈ Zustand/Jotai) - Handling Data — Futures/async-await, REST with Dio, JSON parsing
- Navigation & Routing — GoRouter (≈ React Router)
- Tooling, Testing & Deployment —
flutter test, widget tests, CI/CD
Your first Flutter app
Section titled “Your first Flutter app”Below is a complete, runnable Flutter app. The structure mirrors a React app: an entry point (main()), a root widget (MyApp), and a composed UI tree. Press Run to see it live.
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const WelcomeScreen(),
);
}
}
class WelcomeScreen extends StatelessWidget {
const WelcomeScreen({super.key});
@override
Widget build(BuildContext context) {
final colors = Theme.of(context).colorScheme;
return Scaffold(
backgroundColor: colors.surface,
body: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Icon(Icons.flutter_dash, size: 80, color: colors.primary),
const SizedBox(height: 16),
Text(
'Flutter for React Devs',
style: Theme.of(context).textTheme.headlineMedium?.copyWith(
fontWeight: FontWeight.bold,
color: colors.primary,
),
),
const SizedBox(height: 8),
Text(
'Your React skills transfer. Let\'s build.',
style: Theme.of(context).textTheme.bodyLarge?.copyWith(
color: colors.onSurfaceVariant,
),
),
const SizedBox(height: 32),
FilledButton.icon(
onPressed: () {},
icon: const Icon(Icons.play_arrow),
label: const Text('Start Learning'),
),
],
),
),
);
}
}