Loading...

Best Practices Summary

Quick reference for best practices across all areas.

Code Quality

General

✅ Write clear, readable code
✅ Use meaningful variable names
✅ Add comments for complex logic
✅ Follow DRY principle
✅ Keep functions small and focused

TypeScript

✅ Use explicit types
✅ Avoid any type
✅ Use interfaces for objects
✅ Use types for unions
✅ Enable strict mode

React

✅ Use functional components
✅ Extract reusable logic to hooks
✅ Memoize expensive calculations
✅ Avoid unnecessary re-renders
✅ Use proper key props

Performance

Code

✅ Lazy load heavy components
✅ Code split by route
✅ Use dynamic imports
✅ Optimize bundle size
✅ Remove unused code

Images

✅ Use Next.js Image component
✅ Optimize image formats (WebP/AVIF)
✅ Use appropriate sizes
✅ Lazy load images
✅ Add proper alt text

Caching

✅ Cache API responses
✅ Use appropriate cache strategies
✅ Set proper TTL values
✅ Invalidate cache when needed

Security

Input

✅ Validate all user input
✅ Sanitize HTML content
✅ Validate URLs
✅ Use parameterized queries
✅ Escape output

Authentication

✅ Use secure authentication
✅ Store tokens securely
✅ Implement CSRF protection
✅ Use HTTPS
✅ Rotate secrets regularly

Headers

✅ Set security headers
✅ Configure CSP
✅ Use X-Frame-Options
✅ Set X-Content-Type-Options
✅ Configure CORS properly

Accessibility

HTML

✅ Use semantic HTML
✅ Proper heading hierarchy
✅ Label all form inputs
✅ Add alt text to images
✅ Use ARIA attributes

Keyboard

✅ Ensure keyboard navigation
✅ Visible focus indicators
✅ Skip links
✅ Logical tab order
✅ Keyboard shortcuts

Screen Readers

✅ Test with screen readers
✅ Use ARIA labels
✅ Announce dynamic content
✅ Provide text alternatives
✅ Test with NVDA/JAWS/VoiceOver

Testing

Unit Tests

✅ Test utilities and functions
✅ Test edge cases
✅ Maintain test coverage
✅ Use descriptive test names
✅ Keep tests isolated

Component Tests

✅ Test user interactions
✅ Test accessibility
✅ Test error states
✅ Test loading states
✅ Use accessible queries

Documentation

Code

✅ Document complex logic
✅ Add JSDoc comments
✅ Explain "why" not "what"
✅ Keep comments up to date
✅ Use clear variable names

API

✅ Document all APIs
✅ Include examples
✅ Document parameters
✅ Document return types
✅ Include error cases

Error Handling

Client

✅ Use error boundaries
✅ Provide user-friendly messages
✅ Log errors appropriately
✅ Implement retry logic
✅ Handle edge cases

Server

✅ Validate input
✅ Handle errors gracefully
✅ Return proper status codes
✅ Log errors securely
✅ Don't expose internals

State Management

Local State

✅ Use local state when possible
✅ Lift state up when needed
✅ Use context for global state
✅ Avoid prop drilling
✅ Keep state minimal

Server State

✅ Cache server data
✅ Use appropriate cache strategies
✅ Handle loading states
✅ Handle error states
✅ Implement retry logic

Forms

Validation

✅ Validate on client and server
✅ Provide clear error messages
✅ Show validation in real-time
✅ Prevent invalid submissions
✅ Use proper input types

UX

✅ Clear labels
✅ Helpful placeholders
✅ Progress indicators
✅ Success feedback
✅ Accessible forms

API Design

RESTful

✅ Use proper HTTP methods
✅ Return appropriate status codes
✅ Use consistent naming
✅ Version APIs
✅ Document thoroughly

Performance

✅ Implement pagination
✅ Use caching
✅ Rate limiting
✅ Optimize queries
✅ Compress responses

Deployment

Pre-Deployment

✅ Run all tests
✅ Check build
✅ Review security
✅ Test in staging
✅ Update documentation

Post-Deployment

✅ Monitor errors
✅ Check performance
✅ Verify functionality
✅ Review logs
✅ Have rollback plan

Maintenance

Regular

✅ Update dependencies
✅ Review security
✅ Check performance
✅ Update documentation
✅ Review code quality

Monitoring

✅ Monitor errors
✅ Track performance
✅ Review analytics
✅ Check security
✅ Monitor uptime

Quick Checklist

Before Committing

[ ] Code follows style guide
[ ] Tests pass
[ ] No console errors
[ ] Documentation updated
[ ] Security considered

Before Deploying

[ ] All tests pass
[ ] Build succeeds
[ ] Security reviewed
[ ] Performance checked
[ ] Documentation updated

Resources