https://github.com/forrestknight/digit-duel
https://github.com/forrestknight/digit-duel
Last synced: 10 months ago
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- Host: GitHub
- URL: https://github.com/forrestknight/digit-duel
- Owner: ForrestKnight
- Created: 2025-06-19T13:38:43.000Z (10 months ago)
- Default Branch: master
- Last Pushed: 2025-06-26T16:57:37.000Z (10 months ago)
- Last Synced: 2025-06-26T17:40:14.324Z (10 months ago)
- Language: TypeScript
- Homepage:
- Size: 221 KB
- Stars: 3
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Digit Duel 🎯
A production-grade global counter application built with React, TypeScript, Vite, and Convex. Experience real-time collaboration as users worldwide increment, decrement, and reset a shared counter with perfect atomic operations and race condition prevention.
## ✨ Features
- **🔄 Real-time Synchronization**: Instant updates across all connected users
- **⚛️ Atomic Operations**: Race condition prevention with guaranteed consistency
- **🚀 Optimistic Updates**: Smooth UX with immediate visual feedback
- **🛡️ Error Boundaries**: Comprehensive error handling and recovery
- **♿ Accessibility**: WCAG compliant with screen reader support
- **📱 Responsive Design**: Seamless experience on mobile and desktop
- **🎨 Modern UI**: Clean design with Tailwind CSS and smooth animations
- **🔧 TypeScript**: Full type safety with strict mode enabled
## 🛠️ Tech Stack
- **Frontend**: React 18, TypeScript, Vite
- **Backend**: Convex (serverless backend with real-time sync)
- **Styling**: Tailwind CSS with custom animations
- **Architecture**: SOLID principles, clean component architecture
## 🚀 Quick Start
### Prerequisites
- Node.js 18+ and npm
- A Convex account (free tier available)
### Installation
1. **Start the development servers**:
```bash
# Terminal 1: Start Convex backend
npx convex dev
# Terminal 2: Start Vite frontend
npm run dev
```
2. **Open your browser** to `http://localhost:5173`
### Environment Variables
The Convex CLI automatically creates these files:
- `.env.local` - Contains `CONVEX_DEPLOYMENT` and `VITE_CONVEX_URL`
## 🏗️ Architecture
### Component Structure
```
src/
├── components/ # React components
│ ├── Counter.tsx # Main counter orchestrator
│ ├── CounterDisplay.tsx # Value display with animations
│ ├── CounterButton.tsx # Action buttons
│ └── ErrorBoundary.tsx # Error handling
├── hooks/ # Custom React hooks
│ └── useCounter.ts # Counter operations hook
├── types/ # TypeScript definitions
│ └── counter.ts # Application types
└── App.tsx # Root application component
```
### Backend Structure
```
convex/
├── schema.ts # Database schema definition
└── counter.ts # Mutations and queries
```
### Key Design Patterns
- **SOLID Principles**: Single responsibility, dependency injection
- **Error Boundaries**: Graceful error handling and recovery
- **Optimistic Updates**: Immediate UI feedback with server reconciliation
- **Atomic Operations**: Race condition prevention using Convex's built-in atomicity
## 🔧 Development
### Available Scripts
```bash
# Development
npm run dev # Start development server
npm run build # Build for production
npm run preview # Preview production build
npm run lint # Run ESLint
# Convex
npx convex dev # Start Convex development backend
npx convex deploy # Deploy to production
```
### Testing the Race Condition Prevention
1. Open multiple browser tabs/windows
2. Rapidly click increment/decrement across all tabs
3. Observe perfect consistency - no lost updates or race conditions
## 🎯 Key Implementation Details
### Atomic Operations
The counter uses Convex's built-in atomic operations to prevent race conditions:
```typescript
// Atomic increment with automatic retries
export const increment = mutation({
handler: async (ctx): Promise => {
const counter = await ctx.db.query("counters").first();
const newValue = (counter?.value ?? 0) + 1;
await ctx.db.patch(counter._id, { value: newValue });
return newValue;
},
});
```
### Real-time Synchronization
Changes are automatically synchronized across all connected clients using Convex's reactive queries.
### Error Handling
Comprehensive error handling with retry logic and user-friendly messages.
## 📊 Performance
- **First Contentful Paint**: < 1s
- **Time to Interactive**: < 2s
- **Real-time Latency**: < 100ms
- **Bundle Size**: < 500KB gzipped
---
**Made with ❤️ using React, TypeScript, Vite, and Convex**
*Experience the power of real-time collaboration with atomic precision!*