No-EM-Dash Chrome Extension

Replace em dashes (—) in ChatGPT, FragDasPDF, Intellipaper, and similar sites with your preferred separator (comma, colon, parentheses, or hyphen).

no em dash – Chrome Web Store

Features

• Automatic Replacement: Automatically replaces em dashes in chat and message content
• Multi-Site Support: Works on chat.openai.com, chatgpt.com, and fragdaspdf.de
• Customizable Separators: Choose your preferred separator in the options page
• Real-time Updates: Changes apply immediately without page refresh
• Modern UI: Clean, accessible, and responsive options interface
• Popup Interface: Quick access to settings via extension popup
• Privacy-First: No data collection or external tracking
• Performance Optimized: Efficient DOM manipulation with debouncing

Installation

Chrome Webstore

Install – Chrome Web Store

From Source

1. Clone this repository:

   git clone https://github.com/yourusername/No-EM-Dash.git
   cd No-EM-Dash

2. Install dependencies and build:

   npm install
   npm run build

3. Load in Chrome:

   • Open Chrome and go to chrome://extensions/
   • Enable "Developer mode" (top right)
   • Click "Load unpacked" and select the dist/ folder

Direct Installation

• Use the root folder directly if you prefer not to build
• Follow steps 3-5 from above, but select the root folder instead

Usage

1. Automatic Operation: The extension works automatically on supported sites
2. Change Settings:
   • Click the extension icon in the toolbar for quick access
   • Or right-click the extension icon and choose "Options"
   • Select your preferred separator and save

Supported Separators

• Comma (,) - Default, adds space after comma
• Colon (:) - Simple colon replacement
• Parentheses ( ) - Wraps content in parentheses
• Hyphen (-) - Simple hyphen replacement

🛠️ Development

Project Structure

No-EM-Dash/
├── manifest.json      # Extension configuration
├── content.js         # Content script for DOM manipulation
├── options.html       # Options page UI
├── options.js         # Options page logic
├── popup.html         # Extension popup UI
├── popup.js           # Popup logic
├── build.js           # Build script
├── icons/             # Extension icons
├── img/               # Images and assets
└── dist/              # Built extension (generated)

Available Scripts

• npm run build - Build the extension to dist/ folder
• npm run clean - Remove the dist/ folder
• npm run package - Clean and rebuild the extension

🔧 Technical Details

Manifest V3 Compliance

• Uses Manifest V3 for modern Chrome extension standards
• Implements proper content security policies
• Follows Chrome Web Store guidelines

Storage

• Uses chrome.storage.sync for cross-device synchronization
• Graceful fallback handling for storage errors
• Automatic preference persistence

Content Scripts

• Runs at document_end for optimal timing
• Implements efficient mutation observation
• Handles dynamic content loading
• Includes proper cleanup and error handling

🤝 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 error handling for new features
• Test on multiple supported sites
• Update documentation for new features
• Ensure accessibility compliance

📄 License

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

🙏 Acknowledgments

• Powered by fragdaspdf.de - Read, Write, and Research 10x Faster
• Built with modern Chrome extension best practices
• Inspired by the need for better text formatting in AI conversations