Dutch Postal Code Copier

A Chrome extension that automatically detects Dutch postal codes on webpages and adds a copy functionality.

Features

• Automatically detects Dutch postal codes (format: 4 digits + space + 2 letters, e.g., "3144 CB")
• Highlights detected postal codes with a subtle yellow background
• Shows a copy button when hovering over a postal code
• Visual feedback when a postal code is copied
• Works on Dutch websites by default, with option to enable on all websites
• Optimized performance with batch processing
• Observes DOM changes to detect postal codes in dynamically loaded content

Installation

From Chrome Web Store (Coming Soon)

1. Visit the Chrome Web Store (link to be added)
2. Click "Add to Chrome"
3. Confirm the installation

Manual Installation (Developer Mode)

1. Download or clone this repository
2. Open Chrome and go to chrome://extensions/
3. Enable "Developer mode" in the top-right corner
4. Click "Load unpacked" and select the folder containing the extension files
5. The extension should now be installed and active

Usage

1. Visit any Dutch website containing postal codes
2. The extension will automatically detect and highlight postal codes
3. Hover over a highlighted postal code to reveal the copy button
4. Click the copy button to copy the postal code to your clipboard
5. A green checkmark will briefly appear to confirm the copy action

Settings

You can customize the extension's behavior by clicking on the extension icon in your toolbar:

• Enable on all websites: By default, the extension only runs on Dutch websites (*.nl domains). Enable this option to run the extension on all websites.
• Use performance mode: When enabled, the extension uses batch processing to reduce the impact on page performance. Disable for immediate processing (may cause lag on large pages).

Notes

• The extension only detects properly formatted Dutch postal codes (4 digits + space + 2 letters)
• It does not modify form fields or text inputs
• Postal codes inside scripts or style tags are ignored
• Performance settings help balance detection speed vs. browser performance

Troubleshooting

If the extension is making pages slow:

• Keep "Performance mode" enabled
• Disable "Enable on all websites" if you're not browsing Dutch content
• For very large pages, try refreshing with the extension disabled

Future Improvements

• Add keyboard shortcut for copying selected postal codes
• Add options to customize highlight color
• Add ability to disable the extension for specific websites
• Implement postal code validation against official Dutch postal code database

License

MIT

Credits

Created by PostalCopy