# Development Guidelines

## Build/Test Commands
```bash
python3 -m http.server 8000  # Test: http://localhost:8000
# No build system - pure HTML/JS project
```

## Code Style
- **JS**: ES6+ vanilla, 2-space indent, semicolons, camelCase methods, PascalCase classes
- **Quotes**: Single for JS strings, double for HTML attributes  
- **DOM**: Cache element refs, check existence before manipulation
- **Globals**: Minimize - use class instances for state (e.g., `window.trackingConsent`)
- **Errors**: Use console.log for debug, alert/confirm for user interaction

## Project Structure
- `index.html` - Complete demo with all JS/CSS inline
- `integration-example.js` - Framework integration examples
- `translations` object - i18n with 'en'/'no' ISO codes, localStorage persistence

## Key APIs
```javascript
localStorage.getItem('gdpr-tracking-consent') // 'true' or 'false'
localStorage.getItem('gdpr-language') // 'en' or 'no'
window.trackingConsent.enableTracking() // Programmatic control
document.addEventListener('trackingModeChanged', handler) // Events
```

## Integration Notes
- Google Analytics: Update consent via `gtag('consent', 'update', {...})`
- Cookies: Auto-cleanup of `_ga`, `_gid`, `_gat`, `_fbp`, `_fbc` when disabled
- GDPR compliant by default - minimal tracking until explicit consent