Breaking News: Grepper is joining You.com. Read the official announcement!

usecallback in react

Add Answer

Shirshak Kandel answered on August 26, 2021 Popularity 10/10 Helpfulness 4/10

answer usecallback in react

related react usecallback

related usecallback react

related React useCallback Hook

related usecallback hook

related usecallback in react

related react import useCallBack

related useCallback() react

usecallback in react

Comment

//useCallback is hook that return memorized version of callback function
//only changes when one of dependency is changed
import {useState,useCallback} from 'react'
const [increment,setIncrement]=useState(0)
const [otherCounter,setOtherCounter]=useState(0) 
//useCallback(callback,dependencies)
const increment= useCallback(()=> {
  setCount(count+1)
},[count])

const incrementOtherCounter= useCallback(()=> {
setOtherCounter(otherCounter+1)
},[otherCounter])

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript usecallback

Link to this answer
Share Copy Link

Contributed on Aug 09 2022

Shirshak Kandel

0 Answers Avg Quality 2/10

Closely Related Answers

react usecallback

Comment

const memoizedCallback = useCallback(
  () => {
    doSomething(a, b);
  },
  [a, b],
);

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: reactjs.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Aug 26 2021

Vast Vole

0 Answers Avg Quality 2/10

usecallback react

Comment

import React, { memo, useCallback, useState } from 'react'

const Logger = memo((props) => {
  props.log()
  return null
})

export default function App() {
  const [count, setCount] = useState(0)
  const count5 = Math.floor(count / 5)

  const memoizedFunction = useCallback(() => {
    console.log('useCallback')
  }, [count5])

  const normalFunction = () => {
    console.log('normal')
  }

  return (
    <>
      <button
        onClick={() => {
          setCount(count + 1)
        }}
      >
        Increment {count}
      </button>
      <Logger log={memoizedFunction} />
      <Logger log={normalFunction} />
    </>
  )
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: www.react.express

Tags: hook

Link to this answer
Share Copy Link

Contributed on Nov 08 2022

Mehedi Islam Ripon

0 Answers Avg Quality 2/10

React useCallback Hook

Comment

//todos.js
import { memo } from "react";

const Todos = ({ todos, addTodo }) => {
  console.log("child render");
  return (
    <>
      <h2>My Todos</h2>
      {todos.map((todo, index) => {
        return <p key={index}>{todo}</p>;
      })}
      <button onClick={addTodo}>Add Todo</button>
    </>
  );
};

export default memo(Todos);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: hook

Link to this answer
Share Copy Link

Contributed on May 24 2022

naly moslih

0 Answers Avg Quality 2/10

usecallback hook

Comment

//useCallback to remove too much re-render  
const checkFromLocalStorage = useCallback(() => {
    if (localStorage.getItem('connectedWallet')) {
      //check connectWallet with switch
      switch (localStorage.getItem('connectedWallet')) {
        case 'walletConnect':
          activate(WalletConnect);
        case 'metamask':
          activate(Injected);
        default:
      }
    }
  }, [active]);

  useEffect(() => {
    checkFromLocalStorage();
  }, [active]);

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: Grepper

Tags: hook

Link to this answer
Share Copy Link

Contributed on Aug 20 2022

Shirshak Kandel

0 Answers Avg Quality 2/10

usecallback in react

Comment

useCallback is a react hook which is used for the memorisation of the callback
function as we know in react every component re-rendered so its function also re 
created and so avoid the recreation of complex functions we used the concept of
useCallback which takes a function as a arguement and a dependency list for 
which condition the component are going to create itself;

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Mar 21 2022

Coding is fun

0 Answers Avg Quality 2/10

react import useCallBack

Comment

import { useCallback } from 'react'

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: flaviocopes.com

Tags: import im

Link to this answer
Share Copy Link

Contributed on Dec 08 2021

ExceptionThrower

0 Answers Avg Quality 2/10

useCallback() react

Comment

import React, { useState, useCallback } from 'react'
var funccount = new Set();
const App = () => {
 
 
  const [count, setCount] = useState(0)
  const [number, setNumber] = useState(0)
 
const incrementCounter = useCallback(() => {
  setCount(count + 1)
}, [count])
const decrementCounter = useCallback(() => {
  setCount(count - 1)
}, [count])
const incrementNumber = useCallback(() => {
  setNumber(number + 1)
}, [number])
   
funccount.add(incrementCounter);
funccount.add(decrementCounter);
funccount.add(incrementNumber);
alert(funccount.size);
 
  return (
    <div>
      Count: {count}
      <button onClick={incrementCounter}>
         Increase counter
      </button>
      <button onClick={decrementCounter}>
         Decrease Counter
      </button>
      <button onClick={incrementNumber}>
         increase number
      </button>
    </div>
  )
}
 
 
export default App;

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: www.geeksforgeeks.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jan 05 2023

Sourabh kumar

0 Answers Avg Quality 2/10

usecallback in react

Contents

More Related Answers

usecallback in react

Closely Related Answers

react usecallback

usecallback react

React useCallback Hook

usecallback hook

usecallback in react

react import useCallBack

useCallback() react

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.