ReactuseMemo and useCallback in React: When You Really Need Them
Understand what useMemo and useCallback solve, when they reduce unnecessary renders, when they just complicate your code, and how to verify with tests.
Custom Hooks in React: Extracting Reusable Logic the Right Way
Guide to writing custom hooks to extract stateful logic, avoid code duplication between components, with examples of useFetch, useLocalStorage and how to test.
useState and useEffect: Using Them Correctly
Analyze how useState and useEffect actually work in React, including common mistakes like stale closures, infinite loops, and when not to use useEffect.