A modern, production-ready template for building UserScripts using TypeScript and Vite. This template provides a solid foundation with best practices, type safety, and modern development tools for creating sophisticated Tampermonkey and Greasemonkey scripts.

• 🚀 Modern Tech Stack: TypeScript, Vite, ESLint, Prettier, Bun
• 🛡️ Type Safety: Strict TypeScript configuration with comprehensive UserScript API definitions
• 🔧 Development Tools: ESLint, Prettier, Bun-powered automated build pipeline
• 🎯 Environment Support: Separate development and production configurations
• 📦 Modular Architecture: Component system with reusable utilities
• 💾 Storage Management: Type-safe wrapper for GM_setValue/GM_getValue
• 🛠️ Build System: Optimized Vite configuration with automatic header generation
• 🎨 DOM Utilities: Helper functions for element manipulation and waiting
• ✨ Optional bQuery Upgrade Path: Advanced example using @bquery/bquery/core, reactive, and media
• 🔒 Error Handling: Comprehensive error boundary system
• ⚡ Event System: Type-safe event emitter for module communication
• 📱 Mobile Support: Touch-optimized interface with mobile browser detection
• 🤏 Touch Gestures: Built-in touch event handling and gesture recognition
• 📲 Responsive Design: Mobile-first CSS with safe area support for notched devices

git clone https://github.com/JosunLP/UserScriptProjectTemplate.git
cd UserScriptProjectTemplate
bun install

# Install dependencies
bun install

# Start development mode with auto-rebuild
bun run dev

# Type checking
bun run type-check

# Linting and formatting
bun run validate

src/
├── types/            # TypeScript type definitions
├── utils/            # Utility functions (Storage, DOM, Events)
├── core/             # Core application logic
├── modules/          # Feature modules, including the optional bQuery example
└── index.ts          # Main application entry point

tools/
├── userScriptHeader.ts  # UserScript header generator

assets/               # Icons and static resources
└── icon.afdesign

The main configuration is in header.config.json. This file controls UserScript metadata generation:

{
  "environments": {
    "development": {
      "includes": ["http://localhost:*/*", "https://localhost:*/*"],
      "grants": ["GM_setValue", "GM_getValue", "GM_log", "GM_notification"]
    },
    "production": {
      "includes": ["https://your-domain.com/*"],
      "grants": ["GM_setValue", "GM_getValue"]
    }
  }
}

The template now ships with a selective @bquery/bquery example instead of replacing the existing utility layer.

• The existing DOMUtils, EventEmitter, Storage, and mobile helpers remain the default foundation.
• The advanced example in src/modules/bquery-example.ts demonstrates when bQuery adds value:
  • @bquery/bquery/core for DOM updates and delegated events
  • @bquery/bquery/reactive for signal-driven state
  • @bquery/bquery/media for responsive viewport state
• Only subpath imports are used so the bundle stays as small as possible.
• Because bQuery ships modern ESM, the advanced path now targets current UserScript-capable browsers and runtime versions (node >=24, bun >=1.3.11).
• If you do not want the advanced path, remove the bquery-example module import from src/index.ts and uninstall @bquery/bquery.

This keeps the base template approachable while still providing a modern upgrade path for more interactive UserScripts.

# Development
bun run dev              # Start development with watch mode
bun run dev:build        # Single development build with dev header
bun run dev:header       # Generate header for an existing dev build

# Production
bun run build            # Build for production
bun run build:prod       # Explicit production build

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

# Utilities
bun run clean            # Clean dist folder
bun run type-check       # TypeScript type checking

The template features advanced build optimization for production:

Production optimizations include:

• ⚡ Terser minification with aggressive compression settings
• 🌳 Tree-shaking to remove unused code
• 🎯 Dead code elimination for DEV blocks
• 📦 Module inlining for single-file output
• 🔧 Property mangling for smaller variable names
• 🚀 ES2020 target for modern JavaScript features
• 💾 GZIP compression reducing size by ~75%

1. Configure your script in header.config.json
2. Install dependencies: bun install
3. Start development: bun run dev
4. Write your code in the src/ directory
5. Build for production: bun run build
6. Install the UserScript from dist/ folder in Tampermonkey/Greasemonkey

The template includes a type-safe storage system:

import { Storage } from '@/utils/storage';

// Save data
Storage.set('userData', { name: 'John', visits: 5 });

// Get data with default value
const userData = Storage.get('userData', { name: '', visits: 0 });

// Check if key exists
if (Storage.has('userData')) {
  // Key exists
}

// Remove data
Storage.remove('userData');

Helper functions for DOM manipulation:

import { DOMUtils } from '@/utils/dom';

// Wait for element to appear
const element = await DOMUtils.waitForElement('.my-selector');

// Add custom styles
DOMUtils.addStyles(`
  .my-class { color: red; }
`);

// Create element with attributes
const button = DOMUtils.createElement('button', {
  textContent: 'Click me',
  onclick: () => console.log('Clicked!'),
});

Type-safe communication between modules:

import { EventEmitter } from '@/utils/events';

interface MyEvents {
  userAction: { userId: string };
  dataLoaded: { count: number };
}

const emitter = new EventEmitter<MyEvents>();

// Listen for events
emitter.on('userAction', ({ userId }) => {
  console.log(`User ${userId} performed an action`);
});

// Emit events
emitter.emit('userAction', { userId: '123' });

Create reusable, event-driven modules:

import { EventEmitter } from '@/utils/events';

interface ModuleEvents {
  initialized: void;
  actionPerformed: { action: string };
}

export class MyModule extends EventEmitter<ModuleEvents> {
  async initialize() {
    // Module initialization logic
    this.emit('initialized', undefined);
  }
}

The included advanced example module shows a selective integration strategy:

• keep GM storage in Storage
• keep the existing template modules intact
• add bQuery only where it improves ergonomics

It uses:

• reactive signals for counter and panel state
• delegated event handling via bQuery core
• viewport/media tracking via bQuery media helpers

That makes it a good starting point for overlays, dashboards, and richer in-page tools without forcing a full framework-style migration.

Mobile-specific functionality for touch-enabled devices:

import { MobileUtils } from '@/utils/mobile';

// Detect mobile browser and capabilities
const detection = MobileUtils.detect();
console.log('Is Mobile:', detection.isMobile);
console.log('Has Touch:', detection.hasTouch);
console.log('Browser:', detection.browser);

// Add mobile-optimized styles
if (detection.isMobile) {
  MobileUtils.addMobileStyles();
}

// Unified touch/mouse event handling
MobileUtils.addUnifiedEventListener(element, 'start', event => {
  const position = MobileUtils.getEventPosition(event);
  console.log('Touch/click at:', position);
});

// Create mobile-friendly buttons
const button = mobileModule.createMobileButton('Action', () => {
  console.log('Button pressed');
});

// Orientation detection
console.log('Portrait mode:', MobileUtils.isPortrait());

• Tampermonkey: Full support with all GM_* APIs
• Greasemonkey: Compatible with standard UserScript APIs
• Violentmonkey: Full compatibility
• Safari: Works with userscript managers

Android:

• Kiwi Browser: Full Chrome extension + UserScript support
• Microsoft Edge Mobile: Tampermonkey support
• Firefox Mobile: Greasemonkey, Tampermonkey, Violentmonkey
• Yandex Browser: Chrome extension support

iOS:

• Safari Mobile: Tampermonkey or Userscripts App
• Limited support due to iOS restrictions

• Touch Gestures: Tap, swipe, and pinch detection
• Responsive Design: Mobile-first CSS with viewport adaptation
• Safe Area Support: Automatic handling of notched devices
• Orientation Detection: Portrait/landscape change handling
• Mobile-Optimized UI: Touch-friendly buttons and menus

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Make your changes and ensure tests pass: bun 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

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

This project is licensed under the MIT License.

Jonas Pfalzgraf

• Email: [email protected]
• GitHub: @JosunLP
• Website: josunlp.de

Built with ❤️ for the UserScript community