단순 코드 기록/React
React_useEffect_addEventLister
일일일코_장민기
2024. 3. 19. 11:20
728x90
import React from "react"
import { useState, useEffect } from "react"
export default function App(){
const [num, setNum] = useState(0);
useEffect(() => {
console.log("effect")
document.querySelector("#up").addEventListener("click", onIncrease);
}, []);
function onIncrease(){
setNum(num + 1);
}
return(
<>
<h1>App</h1>
<h1>{num}</h1>
<button id="up">+</button>
</>
)
}
