useCallback Hook | React | Javascript
What is the use of useCallback hook in react ?
useCallback is a React Hook that lets you cache a function definition between re-renders.
const cachedFn = useCallback(fn, dependencies)
Reference
useCallback(fn, dependencies)
Usage
Skipping re-rendering of components
Updating state from a memoized callback
Preventing an Effect from firing too often
Optimizing a custom Hook
Troubleshooting
Every time my component renders, useCallback returns a different function
I need to call useCallback for each list item in a loop, but it’s not allowed
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