Sudoku App Frontend

A modern, accessible Sudoku application built with React, TypeScript, Radix UI, and Tailwind CSS.

Features

• 5 Difficulty Levels: Easy, Medium, Hard, Difficult, Extreme
• Note-Taking System: Pencil mode for taking notes
• Time Tracking: Game timer with pause/resume functionality
• Hint System: Intelligent hints with 3-hint limit
• Attempt Management: Track failed attempts with configurable limits
• Undo/Redo: Full action history and undo functionality
• Mobile-First Design: Responsive design optimized for mobile devices
• Accessibility: WCAG 2.1 AA compliant with screen reader support
• PWA Ready: Offline functionality and app-like experience

Technology Stack

• Framework: React 18 + TypeScript
• UI Components: Radix UI (accessible, unstyled components)
• Styling: Tailwind CSS (utility-first CSS framework)
• State Management: Zustand (lightweight state management)
• Build Tool: Vite (fast development and building)
• Code Quality: ESLint + Prettier + TypeScript

Getting Started

Prerequisites

• Node.js 18+ (recommended: Node.js 20+)
• npm or yarn package manager

Installation

1. Clone the repository

   git clone <repository-url>
   cd sudoku-frontend

2. Install dependencies

   npm install

3. Start development server

   npm run dev

4. Open your browser Navigate to http://localhost:5173

Available Scripts

• npm run dev - Start development server
• npm run build - Build for production
• npm run preview - Preview production build
• npm run lint - Run ESLint
• npm run lint:fix - Fix ESLint issues
• npm run format - Format code with Prettier
• npm run type-check - Run TypeScript type checking

Project Structure

src/
├── components/          # React components
│   ├── ui/             # Reusable UI components
│   ├── game/           # Game-specific components
│   └── layout/         # Layout components
├── hooks/              # Custom React hooks
├── stores/             # Zustand state stores
├── services/           # API and external services
├── types/              # TypeScript type definitions
├── utils/              # Utility functions
└── styles/             # Global styles and CSS

Development Guidelines

Code Style

• Use TypeScript for all new code
• Follow ESLint and Prettier configurations
• Use functional components with hooks
• Implement proper error boundaries
• Write meaningful component and function names

Component Structure

• One component per file
• Use descriptive file names
• Export components as default exports
• Implement proper prop interfaces
• Use TypeScript for all props

State Management

• Use Zustand for global state
• Keep component state local when possible
• Implement proper state persistence
• Use TypeScript for state interfaces

Accessibility

• Use Radix UI components for accessibility
• Implement proper ARIA labels
• Ensure keyboard navigation works
• Test with screen readers
• Follow WCAG 2.1 AA guidelines

Design System

Colors

• Primary: Blue scale for main actions and highlights
• Success: Green for correct moves and completion
• Error: Red for incorrect moves and errors
• Warning: Yellow for hints and warnings
• Neutral: Gray scale for text and backgrounds

Typography

• Numbers: Large, bold text for Sudoku numbers
• Notes: Smaller text for pencil notes
• Labels: Medium weight for UI labels
• Body: Standard weight for general text

Spacing

• Cell Size: 44px (touch-friendly minimum)
• Grid Lines: 2px for thin lines
• Borders: 3px for 3x3 box borders
• Padding: Consistent 4px increments

Testing

Unit Testing

• Test individual components
• Test utility functions
• Test state management
• Use React Testing Library

Integration Testing

• Test component interactions
• Test user workflows
• Test state persistence
• Test accessibility features

Performance Testing

• Monitor bundle size
• Test rendering performance
• Test memory usage
• Use React DevTools Profiler

Deployment

Build Process

1. Run tests

   npm run test

2. Build for production

   npm run build

3. Preview build

   npm run preview

Environment Variables

• VITE_API_URL - Backend API URL
• VITE_APP_NAME - Application name
• VITE_APP_VERSION - Application version

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests for new functionality
5. Ensure all tests pass
6. Submit a pull request

License

This project is licensed under the MIT License.

Support

For support and questions:

• Create an issue in the repository
• Check the documentation
• Review the code examples

Roadmap

Phase 1 (Current)

• ✅ Core game mechanics
• ✅ Basic UI components
• ✅ State management
• ✅ Note-taking system

Phase 2 (Next)

• 🔄 Advanced hint system
• 🔄 Performance optimization
• 🔄 Accessibility improvements
• 🔄 Testing implementation

Phase 3 (Future)

• 📋 Backend integration
• 📋 Cloud sync features
• 📋 Social features
• 📋 Advanced analytics