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React) useEffect์— ๋Œ€ํ•ด ์•Œ์•„๋ณด์ž React๋ฅผ ๋‹ค์‹œ ๋ณต์Šต ์ค‘์— ํ•œ๋ฒˆ ์ •๋ฆฌ๊ฐ€ ํ•„์š”ํ•œ ๊ฒƒ ๊ฐ™์•„์„œ ๊ธ€์„ ์จ ๋ณด๋ ค ํ•œ๋‹ค. const App = () => { const [count, setCount] = useState(0); console.log("rendering"); const add = () => { console.log("add"); setCount(current => { return current+1 }); }; const minus = () => { console.log("minus"); setCount(current => { return current-1 }); }; useEffect(() => { console.log("component render"); return () => { console.log("component end.. 2021. 10. 6.
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