UseMemo is a built-in hook in React that allows you to memoize expensive functions so that you don't have to call them every time you render. Simply supply a function and an array of inputs to useMemo, and it will only recompute the memoized value if one of the inputs changes.
When a component utilises a time-consuming function to compute a value.
Consider another instance in which we have a component that does some action when some data changes, such as the useEffect hook, which logs if a dependency changes.
The useMemo version renders 1 right away. The useEffect version renders null, then runs the effect, changes the state, then queues up a new render with 1 after the component renders.
UseMemo is a built-in hook in React that allows you to memoize expensive functions so that you don't have to call them every time you render. Simply supply a function and an array of inputs to useMemo, and it will only recompute the memoized value if one of the inputs changes.
The introduction of useEffect Hook was motivated by the desire to eliminate the negative consequences of employing class-based components. Tasks like as changing the DOM, obtaining data from API endpoints, setting up subscriptions or timers, and so on might result in unintended side effects.
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Mohanlal Khhurana
5
Very helpful course in learning ReactJS
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LOVKUSH
5
HTTP moudule ka code hee nhi hai .
Please provide Its most imp. thing in entire course.
The zip is empty
Ishwar Shankar Chavan
5
mam such a great hard work really it is ever best course for beginner to advance .......thanks mam
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Nitish Kumar Sharma
5
What madam is telling is difficult to understand please update your faculty.
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Ramanjjilu Naidu
5
May I know where is the source code please. and yes I am very happy to learn with you.
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sumit kumar
5
Best Course
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Shivam gupta
5
course is very very good but in source link not any type of css styling file when i extracted it then empty folder is shown module 4 topic is form added
please solve the issue for our practicing
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