Web Reference: useCallback is a React Hook that lets you cache a function definition between re-renders. React Compiler automatically memoizes values and functions, reducing the need for manual useCallback calls. You can use the compiler to handle memoization automatically. Feb 12, 2026 · useCallback is React’s sharpest tool for keeping function identity stable across renders—when you actually need referential equality to unlock predictable memoization and better React performance. Sep 7, 2025 · In this article, we’ll explain useCallback in plain English and give you practical patterns you can ship today. What is useCallback? useCallback is a React Hook that memoizes a function...
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