Learn how to use the useCallback Hook in functional components.

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The useCallback Hook is used to optimize the performance of applications. It is used when we want to prevent unnecessary rerenders of a component. The useCallback receives a function and then creates a unique identity for that function, which remains active until the dependencies passed to the Hook have changed, i.e., the component will only rerender when the dependencies change. Dependencies can be the props passed to the component.


To implement and use the useCallback Hook, we first have to import it from the react library.

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