Using useCallback to avoid re-rendering functions
In React function components, there is an additional optimization Hook called useCallback. It shares functionality with useMemo, with a slight difference in output behavior in terms of what is returned. In useCallback, a memoized function is returned, while useMemo returns memoized returned values of the function.
Like useMemo, useCallback is invoked when one of its dependencies is updated inside the function component. This ensures that the functional components are not necessarily re-rendered constantly. There are key highlights for useCallback:
- A memoized callback function is returned in
useCallback. This improves the performance of the React application based on memoization techniques. - The change in the dependencies of the
useCallbackHook determines whether it will update or not.
Right now, let’s dive into a simple use case of useCallback for deeper understanding.
The following snippet displays a...