belos-street React 19 best practices, common gotchas, and performance optimization.
State & Hooks
- Multiple setState calls not batching as expected → See hooks-state-update-batching
- Reading state immediately after setState → See hooks-async-state-updates
- New state depends on previous state → See hooks-functional-updates
- Expensive initial state running on every render → See hooks-initial-state-lazy
- Mutating state directly causing bugs → See hooks-state-not-mutated-directly
- Updating object state losing other properties → See hooks-object-state-spread
useEffect
- Effect runs only once on mount → See useeffect-empty-deps
- Missing dependencies causing stale closures → See useeffect-missing-dependencies
- Forgetting to cleanup side effects → See useeffect-cleanup-function
- Using async function as effect → See useeffect-async-pattern
- Conditional useEffect calls causing errors → See useeffect-conditional-effects
- Choosing between useEffect and useLayoutEffect → See useeffect-vs-uselayouteffect
Performance
- Using useMemo unnecessarily → See usememo-unnecessary-optimization
- Object references changing causing re-renders → See usememo-object-stability
- useCallback dependency array issues → See usecallback-dependency-array
- Using useCallback instead of inline functions → See usecallback-vs-inline-functions
Components
- Mutating props directly → See component-props-immutable
- Passing content to components → See component-children-prop
- Component naming conventions → See component-naming-convention
- Setting default prop values → See component-default-props
- Prop type validation → See component-prop-types
Context
- Avoiding prop drilling → See context-avoid-prop-drilling
- Optimizing context performance → See context-performance-optimization
- Providing default values → See context-default-values
- Using multiple contexts → See context-multiple-contexts
Custom Hooks
- Naming convention → See custom-hooks-naming-convention
- Composing hooks together → See custom-hooks-composition
- Cleaning up side effects → See custom-hooks-side-effects
- Returning read-only state → See custom-hooks-readonly-state
- Hooks vs utility functions → See custom-hooks-vs-utility-functions
Refs
- useRef vs useState → See useRef-vs-state
- Accessing DOM elements → See useRef-dom-access
- Forwarding refs → See useRef-forward-ref
- Cleaning up refs → See useRef-cleanup
- Persisting values → See useRef-persistence
Event Handlers
- Naming convention → See event-handlers-naming-convention
- Avoiding inline handlers → See event-handlers-inline
- Binding handlers properly → See event-handlers-binding
- Controlling event propagation → See event-handlers-propagation
- Cleaning up event listeners → See event-handlers-cleanup
Performance
- Using React.memo → See performance-memo
- Using useCallback → See performance-usecallback
- Using useMemo → See performance-usememo
- Code splitting → See performance-code-splitting
- Virtualization → See performance-virtualization
Suspense
- Lazy loading → See suspense-lazy-loading
- Data fetching → See suspense-data-fetching
- Error boundaries → See suspense-error-boundaries
- Fallback UI → See suspense-fallback
- Concurrent features → See suspense-concurrent-features
TypeScript
- Component props typing → See typescript-component-props
- Hooks typing → See typescript-hooks
- Generics in React → See typescript-generics
- Utility types → See typescript-utility-types
- Best practices → See typescript-best-practices
Animation
- CSS transitions → See animation-css-transitions
- CSS animations → See animation-css-animations
- Framer Motion → See animation-framer-motion
- Performance optimization → See animation-performance
- Best practices → See animation-best-practices