Production-grade micro-frontend architecture showcasing React 19.2.0 features

Live Demo • Documentation • Architecture

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⚡ Features

🎯 React 19 Core Actions - Server actions with automatic pending states useOptimistic - Instant UI updates with rollback use() API - Promise unwrapping in components Suspense - Streaming & progressive rendering Document Metadata - Built-in SEO support

🏗️ Architecture Micro-Frontends - Feature-based modules Event Bus - Decoupled communication Lazy Loading - Code splitting by default Type Safety - Full TypeScript coverage Scalable - Production-ready patterns

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🚀 Quick Start

# Clone
git clone https://github.com/waqas1412/react19-nexus.git
cd react19-nexus

# Install
pnpm install

# Dev
pnpm dev

# Build
pnpm build

Open → http://localhost:5173

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🏛️ Architecture

src/
├── features/          # 🎯 Micro-Frontends
│   ├── tasks/        #    Task management
│   ├── dashboard/    #    Analytics
│   └── analytics/    #    Metrics
├── shell/            # 🐚 Application Shell
│   ├── components/   #    Layout, Router
│   └── hooks/        #    Shell hooks
└── shared/           # 🔧 Shared Resources
    ├── components/   #    UI components
    ├── hooks/        #    Custom hooks
    └── utils/        #    Event bus, helpers

Feature Isolation

Each feature is independent with:

• Own components, hooks, services
• Lazy-loaded on demand
• Event-driven communication
• Isolated state management

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💎 React 19 in Action

Actions + useActionState

const [state, submitAction, isPending] = useActionState(
  async (_prevState, formData) => {
    const task = await createTask(formData.get('title'));
    return { success: true, task };
  }
);

useOptimistic

const [optimisticTasks, updateOptimistic] = useOptimistic(
  tasks,
  (state, action) => {
    return state.map(t => 
      t.id === action.id ? { ...t, completed: !t.completed } : t
    );
  }
);

use() API + Suspense

<Suspense fallback={<Loading />}>
  <DataComponent />
</Suspense>

function DataComponent() {
  const data = use(fetchData()); // ✨ Promise unwrapping
  return <div>{data.value}</div>;
}

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🎨 UI Showcase

Glassmorphism Design

• Frosted glass effects
• Neon accents (cyan, purple, pink)
• Smooth animations
• Dark cyberpunk theme

Performance

• Bundle: 311KB (99KB gzipped)
• Code Splitting: Automatic by feature
• Lazy Loading: All routes
• Animations: Framer Motion

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📦 Tech Stack

Category	Technology
Framework	React 19.2.0
Language	TypeScript 5.9
Build	Vite 7.1
Styling	Tailwind CSS 3.4
Animation	Framer Motion 12
Testing	Vitest + RTL
Linting	ESLint 9 (Flat Config)

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🧪 Testing

pnpm test          # Run tests
pnpm test:ui       # UI mode
pnpm test:coverage # Coverage report

12 tests across components, hooks, and features.

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📚 Documentation

• Micro-Frontend Guide
• Performance
• Deployment
• Accessibility

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🎯 Principles

SOLID

✅ Single Responsibility
✅ Open/Closed
✅ Liskov Substitution
✅ Interface Segregation
✅ Dependency Inversion

Best Practices

✅ DRY (Don't Repeat Yourself)
✅ Feature-based structure
✅ Type safety everywhere
✅ Event-driven architecture
✅ Lazy loading by default

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📈 Performance Metrics

Metric	Value
Lighthouse	95+
First Contentful Paint	< 1.5s
Time to Interactive	< 3.0s
Bundle Size	99KB (gzipped)

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🤝 Contributing

Contributions welcome! See CONTRIBUTING.md

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📄 License

MIT © Waqas1412

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Built with ⚡ by @waqas1412

⭐ Star this repo if you find it useful!