useMemo Hook in React | #28 React Course

[@code75581]

Great vidéo ! Thanks a lot.
Please what tool do you use for the animated presentation ? It's really nice.

[@CodewithSloba]

Thanks, adobe

[@rishiraj2548]

Thanks

[@CodewithSloba]

You're welcome

[@hassanshahid567]

Cant we achieve the same thing by useEffect?

[@CodewithSloba]

I don’t see how you can achieve the same

[@hassanshahid567]

@@CodewithSloba actually I'm confused. useEffect and useMemo both take dependency array and are executed when value of dependency array changes so how they are different?

[@CodewithSloba]

@@hassanshahid567 useMemo executes the function and it caches the result. useCallback caches the instance of function, in case you want to send it as a property to a child. So it doesn't trigger re-render.
I hope it's clear now

[@hassanshahid567]

@@CodewithSloba yes!! Thanks 🙏

[@somith16]

isn't it same like usecallback what is the difference between usecallback and usememo??????

[@CodewithSloba]

it’s not the same, useMemo caches the result of the function, but useCallback caches the function without executing.
You use useCallback when you want to pass a function as a prop

[@somith16]

@@CodewithSloba thanks 🙏