React.js Logical React.js Logical Interview Questions and Answers 1. How do you prevent unnecessary re-renders in a large React app? Explanation: React re-renders components when props or state change. To avoid unnecessary re-renders, use: React.memo() to memoize components. useMemo() to memoize computed values. useCallback() to memoize functions. This prevents React from re-rendering unless necessary, improving […]
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