useCallBack and React.memo

 import React,{useCallback} from "react";



export default function TestCallBack() {

    // function TestChildFunction() {
    //     alert("Success");
    // }
    const TestChildFunction=useCallback(()=>{
        alert("Success");
    })

    return<>
    <TestChild onClickFun={TestChildFunction} />
    </>
}


const TestChild=React.memo(({onClickFun})=>{

    return <>
        <button onClick={onClickFun} >Call Function Parent</button>
    </>
})

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