React Hooks: A Deep Dive

Hooks are the foundation of modern React. Here's how to use them effectively and avoid common pitfalls.

Best Practices#

Dependencies:
✓ Include all values used inside effect
✓ Use ESLint exhaustive-deps rule
✓ Use refs for values you don't want to track
✓ Consider useReducer for complex state

Performance:
✓ Memoize expensive computations
✓ Use useCallback for callbacks passed to children
✓ Split state by update frequency
✓ Don't over-optimize

Custom Hooks:
✓ Extract reusable logic
✓ Start with 'use' prefix
✓ Return consistent shapes
✓ Handle cleanup properly

Hooks enable powerful patterns in React. Understand the rules, manage dependencies carefully, and create custom hooks for reusable logic. Use useMemo and useCallback judiciously—profile first before optimizing.

React Hooks: A Deep Dive

useState#

useEffect#

useMemo and useCallback#

useRef#

useReducer#

Custom Hooks#

Rules of Hooks#

Best Practices#

Conclusion#

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