Скачать или смотреть useCallback hook in react explained (under 9 minutes)

Learn how to use the useCallback hook in React JS with this easy-to-follow, tutorial under 9 minutes. Perfect for beginners or anyone building functional React components and wanting to optimize performance. In this video, I explain:

What useCallback is and why it’s important for performance in React applications.
How to use useCallback — syntax and when to use it.
How to avoid unnecessary re-renders when passing functions to child components, or when using callbacks inside effects.

Whether you’re building small React apps or optimizing large ones — this video will help you understand when and how to use this very important hook in react from point of view of performance optimisation

Useful for:
React JS beginners.
Developers migrating to hooks-based functional components from class based components.
Developers looking to optimize React app performance

Checkout this playlist, where I have explained all important hooks in react
   • React useEffect hook in 9 minutes  


Timestamps:

00:00 – What is useCallback hook?
00:21 – Syntax of useCallback
00:59 – What useCallback returns
1:10 - Example with useCallback
3:28 - Example without useCallback
4:16 - Why React.memo used?
6:02 - useCallback example without React.memo
7:29 - Summary