useCallback: Memoizing Functions

The `useCallback` hook is used to memoize callback functions within functional components.
It takes a function and an array of dependencies as arguments.
It returns a memoized version of the callback function.
It is useful for optimizing performance by preventing unnecessary re-creation of callback functions on each render, especially when passed as props to child components.

Example: Below is an example of useCallback hook.

Javascript

import React, { useCallback } from 'react';
 
const Button = ({ onClick, label }) => {
  return <button onClick={onClick}>{label}</button>;
};
 
const MyComponent = () => {
  const handleClick = useCallback(() => {
    console.log('Button clicked!');
  }, []);
 
  return <Button onClick={handleClick} label="Click me" />;
};
 
export default MyComponent;

Optimizing Performance with useMemo and useCallback Hooks

In React applications, optimizing performance is crucial for ensuring smooth user experiences, especially in components with complex computations or frequent re-renders. Two hooks provided by React, useMemo, and useCallback, offer efficient ways to achieve performance improvements by memoizing values and callback functions, respectively.

Table of Content

Understanding the Need for Optimization
Determining When to Utilize These Hooks
useMemo: Preserving Computation Results
useCallback: Memoizing Functions
How useCallback works?
Preventing Unnecessary Child Component Rerenders
Benefits of useMemo an useCallback Hooks
Conclusion

useCallback: Memoizing Functions

Javascript

Optimizing Performance with useMemo and useCallback Hooks

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