# Async JavaScript
> [!NOTE] Overview
> Async JavaScript is a performance optimization plugin that helps eliminate render-blocking JavaScript by adding async or defer attributes to script tags.
## Key Features
1. Script Management
- Async loading
- Defer loading
- Script exclusions
- jQuery optimization
2. Advanced Options
- Selective async/defer
- jQuery optimization
- Plugin compatibility
- Theme support
3. Additional Features
- Quick setup
- Performance monitoring
- Debug mode
- Compatibility checks
## Usage Status
- **Recommendation Level**: Recommended
- **Pricing**: Free
- **Installation Type**: Performance Plugin
## Configuration Guide
### 1. Basic Setup
1. General Settings
- Enable async
- Enable defer
- jQuery handling
- Script exclusions
2. Optimization Options
- Script detection
- Loading method
- Compatibility mode
- Debug settings
### 2. Advanced Settings
1. Script Rules
- Include/exclude
- Method selection
- Priority order
- Dependencies
2. Performance Settings
- Load timing
- Error handling
- Fallback options
- Monitoring
## Best Practices
1. Initial Setup
- Test compatibility
- Check functionality
- Monitor errors
- Document changes
2. Maintenance
- Regular checks
- Update exclusions
- Monitor performance
- Test new scripts
## Integration Notes
- Works with:
- [[WP Rocket]]
- [[Autoptimize]]
- Most themes
- Common plugins
## Common Issues & Solutions
1. Script Problems
- jQuery conflicts
- Loading errors
- Plugin conflicts
- Theme issues
2. Performance Issues
- Script order
- Dependencies
- Timing problems
- Browser support
## Personal Experience
Effective tool for JavaScript optimization. Requires careful testing with each implementation. Best used alongside other performance plugins for comprehensive optimization.
## Alternatives
1. [[WP Rocket]]
2. [[Autoptimize]]
3. Perfmatters
4. Flying Scripts
## Best Use Cases
1. Basic Optimization
- Simple sites
- Blog sites
- Portfolio sites
- Static content
2. Advanced Needs
- Custom scripts
- Complex sites
- Performance focus
- Script control
## Performance Impact
1. Loading Benefits
- Faster rendering
- Better scores
- Reduced blocking
- Improved UX
2. Resource Usage
- Script timing
- Browser resources
- Memory usage
- Network impact
## Configuration Tips
1. Script Settings
- Test each change
- Monitor errors
- Check compatibility
- Document exclusions
2. Performance Strategy
- Prioritize scripts
- Handle dependencies
- Test thoroughly
- Monitor impact
## Limitations
1. Technical Constraints
- Script dependencies
- jQuery handling
- Browser support
- Plugin conflicts
2. Features
- Basic controls
- Limited options
- Manual configuration
- Debug limitations
## Resources
- [WordPress Repository](https://wordpress.org/plugins/async-javascript/)
- [Documentation](https://wordpress.org/plugins/async-javascript/#description)
- [Support Forum](https://wordpress.org/support/plugin/async-javascript/)
- [GitHub Repository](https://github.com/futtta/async-javascript)