The article explains the useCallback React Hook, which memoizes functions to maintain a consistent reference unless dependencies change, thus optimizing performance and preventing unnecessary re-renders in child components. Functions defined in components are recreated on each render, causing inefficiencies, particularly when passed as props. This guide delineates when and how to use useCallback effectively, contrasting it with useMemo for value memoization, and emphasizes the significance of function reference stability in performance-critical applications.
useCallback is a React Hook that memoizes functions, ensuring they maintain a stable reference across renders unless their dependencies change, helping to optimize performance.
React applications often suffer from unnecessary re-renders due to redefining functions each render cycle, which can lead to performance inefficiencies especially with memoized components.
It's essential to use useCallback when passing functions to memoized components or optimizing critical event handlers to maintain function reference stability.
While useCallback memoizes functions, useMemo focuses on memoizing values, highlighting their differing applications in managing re-renders in React.
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