BrowserExtensionTemplate

Description

A modern, production-ready template for building browser extensions using TypeScript, SASS, and Vite. This template provides a solid foundation with best practices, type safety, and modern development tools.

Features

• 🚀 Modern Tech Stack: TypeScript, SASS, Vite, Bootstrap
• 🛡️ Type Safety: Strict TypeScript configuration with comprehensive error checking
• 🔧 Development Tools: ESLint, Prettier, automated workflows
• 🎯 Cross-Browser: Supports both Chrome (Manifest v3) and Firefox (Manifest v2)
• 📦 Component System: Reusable UI components with type safety
• 💾 Session Management: Robust localStorage-based session handling
• 🛠️ Build System: Optimized Vite configuration with code splitting
• 🎨 Modern CSS: CSS Custom Properties with SASS preprocessing
• 🔒 Security: Content Security Policy and secure coding practices
• ⚡ Error Handling: Comprehensive error boundary system

Installation

Quick Start

git clone https://github.com/JosunLP/BrowserExtensionTemplate.git
cd BrowserExtensionTemplate
npm install

Development Setup

# Install dependencies
npm install

# Start development mode with auto-rebuild
npm run dev

# Type checking
npm run type-check

# Linting and formatting
npm run validate

Usage

Project Structure

src/
├── classes/           # Core classes (Session, ErrorBoundary)
├── components/        # Reusable UI components
├── sass/             # SASS styles with CSS custom properties
├── types/            # TypeScript type definitions
├── app.ts            # Popup entry point
├── settings.ts       # Options page entry point
└── background.ts     # Background service worker

public/
├── icons/            # Extension icons
├── manifest.json     # Extension manifest
├── popup.html        # Popup HTML template
└── options.html      # Options page HTML template

tools/                # Build and automation scripts

Configuration

The main configuration is in app.config.json. This file is automatically synchronized with package.json and manifest.json:

{
  "AppData": {
    "id": "your_extension_id",
    "name": "Your Extension Name",
    "version": "1.0.0",
    "description": "Your extension description"
  },
  "htmlTemplatePairs": [
    {
      "key": "{{PLACEHOLDER}}",
      "value": "Replacement Value"
    }
  ]
}

Build Commands

# Development
npm run dev              # Start development with watch mode
npm run sync            # Sync configuration files

# Production
npm run deploy-v3       # Build for Chrome (Manifest v3)
npm run deploy-v2       # Build for Firefox (Manifest v2)

# Quality Assurance
npm run validate        # Type check + lint
npm run lint           # ESLint with auto-fix
npm run format         # Prettier formatting

# Utilities
npm run clean          # Clean dist folder
npm run build-tooling  # Compile TypeScript tools

Development Workflow

1. Configure your extension in app.config.json
2. Run sync to update all config files: npm run sync
3. Start development: npm run dev
4. Write your code in the src/ directory
5. Build for production: npm run deploy-v3 or npm run deploy-v2
6. Load the extension from the dist/ folder in your browser

Session Management

The template includes a robust session management system:

import { Session } from './classes/session';

// Get session instance (async)
const session = await Session.getInstance();

// Save data
session.contentTest = 'New value';
await session.save();

// Reset session
await Session.reset();

Error Handling

Built-in error boundary system:

import { ErrorBoundary } from './classes/errorBoundary';

const errorBoundary = ErrorBoundary.getInstance();

// Wrap async functions
const safeAsyncFunction = errorBoundary.wrapAsync(asyncFunction);

// Add custom error handlers
errorBoundary.addErrorHandler(error => {
  console.log('Custom error handling:', error);
});

Component System

Type-safe, reusable components:

import { BasicButton } from './components/button';

// Create button
const button = new BasicButton('primary', 'Click me', 'my-button');

// Render as HTML string
const htmlString = button.render();

// Or create as DOM element
const buttonElement = button.createElement();

Browser Compatibility

• Chrome: Manifest v3 (recommended)
• Firefox: Manifest v2 (automatically converted)
• Edge: Manifest v3 compatible

Contributing

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Make your changes and ensure tests pass: npm run validate
4. Commit your changes: git commit -m 'Add amazing feature'
5. Push to the branch: git push origin feature/amazing-feature
6. Open a Pull Request

Development Guidelines

• Follow TypeScript best practices
• Use meaningful variable and function names
• Add proper error handling
• Write self-documenting code
• Follow the established project structure
• Run npm run validate before committing

License

This project is licensed under the MIT License.

Author

Jonas Pfalzgraf

• Email: info@josunlp.de
• GitHub: @JosunLP

Changelog

v0.0.1 (Current)

• ✨ Modern TypeScript setup with strict type checking
• 🛡️ Comprehensive error handling system
• 🎨 CSS Custom Properties with SASS
• 🔧 ESLint and Prettier configuration
• 📦 Optimized Vite build system
• 🚀 Cross-browser compatibility (Chrome/Firefox)
• 💾 Robust session management
• 🎯 Component-based architecture