JavaScript Calendar Application

A modern, interactive calendar application built with vanilla JavaScript, HTML, and CSS. This project provides a clean, responsive interface for managing events with local storage persistence.

Features

✅ Completed Features

• Interactive Calendar Grid: 7-column CSS Grid layout with month navigation
• Date Navigation: Click navigation buttons or use Ctrl+Arrow keys to navigate months
• Date Selection: Click dates to select them with visual feedback
• Event Data Model: Comprehensive Event and EventManager classes for data management
• Responsive Design: Mobile-first CSS design that works on all devices
• Accessibility: ARIA labels, keyboard navigation, and screen reader support
• Modern UI: Clean, modern interface with hover effects and smooth transitions

🚧 In Development

• Local Storage Integration: Persistent event storage across browser sessions
• Event Creation Modal: Form-based event creation with validation
• Event Display: Visual indicators and event details on calendar dates
• Event Editing: Edit and delete existing events
• Form Validation: Comprehensive input validation and error handling

Technology Stack

• Frontend: Vanilla JavaScript (ES6+), HTML5, CSS3
• Storage: Browser localStorage API (planned)
• Styling: CSS Grid, Flexbox, CSS Custom Properties
• Architecture: Object-oriented JavaScript with ES6 classes

Project Structure

├── index.html          # Main HTML structure with semantic calendar grid
├── script.js           # JavaScript application logic and classes
├── styles.css          # Complete CSS styling with responsive design
├── package.json        # Project dependencies
├── .taskmaster/        # Task Master AI project management
└── README.md          # This file

Getting Started

Prerequisites

• Modern web browser (Chrome, Firefox, Safari, Edge)
• No build process required - runs directly in the browser

Installation

1. Clone the repository

   git clone https://github.com/yourusername/javascript-calendar.git
   cd javascript-calendar

2. Open in browser

   # Simply open index.html in your browser
   open index.html
   # or
   start index.html

3. Or use a local server

   # Using Python
   python -m http.server 8000
   
   # Using Node.js
   npx serve .

Usage

Navigation

• Month Navigation: Use the arrow buttons (‹ ›) to navigate between months
• Keyboard Shortcuts:
  • Ctrl + ← - Previous month
  • Ctrl + → - Next month
  • Escape - Close modal (when implemented)

Date Selection

• Click any date to select it (highlighted in green)
• Click dates from other months to navigate to that month
• Today's date is highlighted in blue

Current Capabilities

• View calendar in monthly format
• Navigate between months and years
• Select dates with visual feedback
• Responsive design works on mobile and desktop

Architecture

Core Components

DateUtils

Comprehensive date manipulation utilities including:

• Calendar grid generation with adjacent month dates
• Month/year navigation calculations
• Date formatting and parsing
• Leap year handling and validation

Event Class

Event data model with properties:

• id, title, description, date
• startTime, endTime, category
• createdAt, updatedAt timestamps
• Built-in validation and JSON serialization

EventManager Class

Event management system featuring:

• CRUD operations with validation
• Efficient date-based indexing using Maps
• Search and filter capabilities
• Import/export functionality
• Event statistics and analytics

CalendarApp

Main application controller managing:

• Calendar rendering and updates
• User interaction handling
• Modal management system
• Event integration and display

Development

Task Management

This project uses Task Master AI for structured development:

# View all tasks
npm run taskmaster get-tasks

# Work on next task  
npm run taskmaster next-task

Code Style

• ES6+ JavaScript with classes and modern syntax
• Semantic HTML with proper ARIA attributes
• Mobile-first CSS with CSS Grid and Flexbox
• Consistent naming with camelCase for JavaScript, kebab-case for CSS

Testing

Currently manual testing. Automated testing framework planned for future releases.

Roadmap

Phase 1: Core Calendar ✅

• ✅ Basic project structure
• ✅ Calendar grid layout and navigation
• ✅ Date selection and interaction
• ✅ Event data modeling

Phase 2: Event Management 🚧

• 🔄 Local storage integration
• 📋 Event creation modal and forms
• 📋 Event display on calendar
• 📋 Event editing and deletion

Phase 3: Enhanced Features 📅

• 📅 Form validation and error handling
• 📅 Event categories and colors
• 📅 Search and filter functionality
• 📅 Export/import capabilities

Phase 4: Polish & Optimization 🎯

• 🎯 Performance optimization
• 🎯 Advanced accessibility features
• 🎯 Keyboard shortcuts
• 🎯 Theme customization

Contributing

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Commit your changes: git commit -m 'Add amazing feature'
4. Push to the branch: git push origin feature/amazing-feature
5. Open a Pull Request

Development Guidelines

• Follow existing code style and patterns
• Add comments for complex logic
• Test on multiple browsers and screen sizes
• Update documentation for new features

Browser Support

• ✅ Chrome 70+
• ✅ Firefox 65+
• ✅ Safari 12+
• ✅ Edge 79+

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Built with modern web standards and best practices
• Inspired by contemporary calendar applications
• Developed using Task Master AI for structured project management

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Status: Active Development | Version: 0.1.0 | Last Updated: January 2025