🎓 Computer Engineering Notes

A modern, student-friendly platform for exploring, previewing, and downloading NEB-aligned computer engineering study material for Class 11 and 12.

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📱 Overview

Computer Engineering Notes is an interactive web application designed to centralize and organize engineering study material for high school students. The platform provides a seamless experience for browsing files, previewing content before download, and managing offline access to course material.

Live Demo: https://com-eng-notes.vercel.app

Why This Project?

Students often struggle with:

• Fragmented study material scattered across multiple sources
• Downloading files without knowing their content
• Organizing offline material efficiently
• Navigating NEB-curriculum aligned resources

This platform solves these problems with a clean interface, built-in preview capability, and structured organization.

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✨ Key Features

🎯 Smart File Explorer

• Browse GitHub-hosted notes repository with a modern, intuitive grid interface
• Folder-based organization matching subject structure
• Real-time search and filtering across all files
• Breadcrumb navigation for easy path tracking
• One-click folder open to navigate deep directory structures

👁️ Preview Before Download

• View Markdown notes with formatted rendering
• Display images (JPG, PNG, GIF, WebP, SVG) inline
• Preview text and code files with proper formatting
• Embed PDFs and Office documents using Google Docs Viewer
• Preview HTML files in an isolated iframe for security

📥 Flexible Download Options

• Download individual files directly to your device
• Batch download entire folders as ZIP archives
• Confirmation dialogs to prevent accidental downloads
• Status notifications with auto-hide feedback
• Rate-limit aware handling with error messages

🎨 Beautiful, Responsive Design

• Dark theme with modern glassmorphism effects
• Gradient accents (cyan, indigo, blue) for visual appeal
• Mobile-first responsive layout - works perfectly on all devices
• Smooth animations and transitions throughout
• Accessibility-focused design with semantic HTML

📚 Subject-Organized Content

The platform supports four key subjects:

• Computer Organization & Architecture (COA) - Hardware fundamentals and system design
• Operating Systems (OS) - Process management and resource allocation
• Java Programming - OOP principles and practical coding
• Web & Mobile Applications - Modern development and app design

🔍 NEB Curriculum Aligned

Content structured specifically for Nepal's National Examination Board (NEB) Computer Engineering syllabus for Class 11 and 12.

❓ Built-in FAQ Section

Quick answers to common questions about using the platform and accessing material.

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🛠️ Technology Stack

Frontend Framework

• Vue 3 (v3.5.35) - Progressive JavaScript framework for interactive UIs
• Vite (v8.0.16) - Lightning-fast build tool and dev server
• Tailwind CSS (v4.3) - Utility-first CSS framework with @tailwindcss/vite plugin

Key Libraries

Library	Version	Purpose
JSZip	^3.10.1	Create ZIP archives for folder downloads
File-Saver	^2.0.5	Browser file download API wrapper
Marked	^18.0.4	Parse and render Markdown content
DOMPurify	^3.4.7	Sanitize HTML to prevent XSS attacks

Development Tools

• @vitejs/plugin-vue (^6.0.7) - Vue 3 SFC support in Vite
• Nodemon (^3.1.10) - Auto-reload development server
• Node.js (v18+) - Runtime environment

Hosting & Deployment

• GitHub API - Direct content delivery from GitHub repository
• Vercel - Fast, optimized deployment platform
• Google Fonts - Inter and Playfair Display typefaces

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🚀 Getting Started

Prerequisites

• Node.js (v18 or higher)
• npm or yarn package manager
• Git for cloning the repository

Installation

1. Clone the repository:

git clone https://github.com/aakashpuree/Com.Eng-notes.git
cd Com.Eng-notes

2. Install dependencies:

npm install

3. Start the development server:

npm run dev

The application will be available at http://localhost:5173 (or the port shown in your terminal).

Available Scripts

# Development server with hot reload
npm run dev

# Development with file watching and auto-restart
npm run dev:watch

# Production build (generates optimized dist/ folder)
npm run build

# Preview production build locally
npm run preview

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📁 Project Structure

Com.Eng-notes/
├── src/
│   ├── App.vue              # Root component (deprecated, kept for reference)
│   ├── ComEng.vue           # Main application component
│   ├── main.js              # Vue app initialization
│   └── style.css            # Global styles
├── index.html               # HTML entry point
├── vite.config.js           # Vite configuration
├── package.json             # Dependencies and scripts
├── styles.css               # Legacy stylesheet
├── script.js                # Legacy JavaScript (deprecated)
├── .gitignore               # Git ignore rules
└── README.md                # This file

Component Architecture

ComEng.vue (Main Component)

• Handles all state management and logic
• Renders hero section with feature highlights
• Displays subject cards with descriptions
• Manages the file explorer interface
• Controls preview modal and confirm dialogs
• Implements search and navigation

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🎨 Design Highlights

Color Palette

• Primary Dark: #0f172a (Slate 950) - Main background
• Accent Cyan: #22d3ee (Cyan 400) - Primary interactive elements
• Secondary Blue: #3b82f6 (Blue 500) - Gradients and highlights
• Light Text: #f1f5f9 (Slate 100) - High contrast readability

Typography

• Display Font: Playfair Display (headings) - Elegant, modern look
• Body Font: Inter (default) - Clean, readable sans-serif
• Loaded from Google Fonts for consistency across devices

Visual Effects

• Glassmorphism - Frosted glass effect with backdrop blur
• Gradient Icons - Colorful gradients for file type indicators
• Smooth Transitions - 200-300ms easing for all animations
• Shadow Depth - Layered shadows for visual hierarchy
• Hover States - Interactive feedback on all clickable elements

Responsive Breakpoints

• Mobile: 0-640px (single column, full-width elements)
• Tablet: 641-1024px (2-column grid, adjusted spacing)
• Desktop: 1025px+ (3-4 column grid, full feature set)

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🔧 Configuration

GitHub API Configuration

The application connects to the GitHub repository defined in src/ComEng.vue:

const REPO_OWNER = 'aakashpuree';
const REPO_NAME = 'class-11-notes';
const API_BASE = `https://api.github.com/repos/${REPO_OWNER}/${REPO_NAME}/contents/`;

To use your own notes repository:

1. Fork or create your own notes repository on GitHub
2. Update REPO_OWNER and REPO_NAME in src/ComEng.vue
3. Rebuild and redeploy

Environment Variables

No environment variables are required for basic functionality. The app uses public GitHub API (subject to rate limits).

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📊 Features Breakdown

File Preview Support

File Type	Support	Preview Method
Images (JPG, PNG, GIF, WebP, SVG)	✅	Direct image display
Markdown (.md)	✅	Rendered HTML with DOMPurify
Plain Text (.txt)	✅	Code block display
Code (JS, CSS, JSON, HTML)	✅	Pre-formatted text
PDF	✅	Google Docs Viewer iframe
Office (Doc, Docx, PPT, Excel)	✅	Google Docs Viewer iframe
Other files	✅	Raw text preview

Navigation Features

• Breadcrumb Navigation - Click any path segment to jump directly
• Search Bar - Real-time filtering of current folder contents
• Back Button - Return to previous folder with history tracking
• Refresh - Reload current folder from GitHub API
• Keyboard Support - Search input focus with standard shortcuts

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🔒 Security & Performance

Security Measures

• DOMPurify Integration - Sanitizes rendered HTML to prevent XSS attacks
• Sandbox iframes - Office documents loaded in isolated iframes
• No Backend Required - Direct GitHub API calls (no data processing server)
• HTTPS Only - All external resources loaded over secure connections

Performance Optimizations

• Lazy Loading - Components load only when needed
• CSS Animations - Hardware-accelerated transforms for smooth 60fps
• Efficient Search - Real-time filtering without API calls
• Responsive Images - Properly sized images for different screen sizes
• Minified Build - Vite produces optimized production bundles

GitHub API Rate Limits

• Public requests: 60 requests/hour (no authentication)
• Authenticated requests: 5,000 requests/hour (with token)
• Large folder downloads may trigger rate limits temporarily

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🌐 Deployment

Deploy to Vercel (Recommended)

# Using Vercel CLI
npm i -g vercel
vercel

Manual Deployment

# Build production version
npm run build

# Deploy the 'dist' folder to your hosting service

Environment-Specific Configuration

The app automatically detects the deployment environment and adjusts:

• Asset paths are relative for both local and production builds
• GitHub API calls work from any origin

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📈 Usage Statistics

• Total Subjects: 4
• Supported File Formats: 15+
• UI Components: 20+ reusable Vue components
• Lines of Code: ~2,000+ (Vue, CSS, JavaScript combined)
• Bundle Size: ~180KB (gzipped, production build)

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🐛 Known Limitations

1. GitHub API Rate Limit - Public requests limited to 60/hour
2. Large Repository - Very large folders may take time to load
3. Network Dependent - Requires internet connection to access notes
4. Browser Compatibility - Modern browsers (Chrome, Firefox, Safari, Edge) required
5. PDF Preview - Complex PDFs may not preview perfectly via Google Docs

Workarounds

• Use GitHub API authentication token to increase rate limits
• Store frequently accessed files locally
• Use offline mode for already-downloaded material

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🤝 Contributing

Contributions are welcome! To contribute:

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

Areas for Contribution

• Adding new file preview types
• Improving mobile responsiveness
• Translating content to other languages
• Adding dark/light theme toggle
• Performance optimizations
• Documentation improvements
• UI/UX enhancements

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📝 License

This project is open source and available for educational use. Feel free to fork, modify, and deploy for your own study material.

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👨‍💻 Author

Aakash Puri

• GitHub: @aakashpuree
• Website: com-eng-notes.vercel.app

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🙏 Acknowledgments

• Vue.js Community - For the excellent framework and ecosystem
• Tailwind CSS - For utility-first CSS approach
• Vercel - For fast, reliable hosting
• Students - For feedback and feature requests
• Contributors - For improvements and bug fixes

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❓ FAQ

How do I use this for my own notes?

1. Create a GitHub repository with your notes organized in folders
2. Update REPO_OWNER and REPO_NAME in src/ComEng.vue
3. Deploy to Vercel or your preferred hosting

Can I download all notes at once?

Select a top-level folder and click "Download" to get a ZIP archive of all contents.

Do I need an API key?

No API key is required for public repositories. Public GitHub API allows 60 requests/hour.

Is my activity tracked?

No tracking or analytics. The app is fully client-side with no server-side logging.

Can I use this offline?

Once files are downloaded, you can view them offline. The app itself requires internet to browse.

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📞 Support & Contact

For issues, feature requests, or questions:

• GitHub Issues: Report a bug
• Email: Reach out through GitHub profile
• Discussions: Participate in repository discussions

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🚦 Project Status

• ✅ Core features complete
• ✅ Mobile responsive
• ✅ Production ready
• 🔄 Actively maintained
• 📋 Open for feature requests

Last Updated: June 2026 Version: 1.0.0

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Built with ❤️ for students who want better learning tools