Hooks are the foundation of modern React. Here's how to use them effectively and avoid common pitfalls.
useState
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useEffect
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useMemo and useCallback
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useRef
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useReducer
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Custom Hooks
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Rules of Hooks
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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
Conclusion
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.