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[React] ๊ณต์‹ ๋ฌธ์„œ / Hook / 5. Hook ๊ทœ์น™

Hook์€ ๋‹ค์Œ 2๊ฐ€์ง€ ๊ทœ์น™์„ ๋”ฐ๋ฅธ๋‹ค. 1. ์ตœ์ƒ์œ„(at the top level)์—์„œ๋งŒ Hook ํ˜ธ์ถœ ๋ฐ˜๋ณต๋ฌธ, ์กฐ๊ฑด๋ฌธ, ์ค‘์ฒฉ๋œ ํ•จ์ˆ˜ ๋‚ด์—์„œ ์‹คํ–‰X ์กฐ๊ฑด๋ถ€๋กœ effect๋ฅผ ์‹คํ–‰ํ•˜๊ธธ ์›ํ•œ๋‹ค๋ฉด ์•„๋ž˜์™€ ๊ฐ™์ด ์กฐ๊ฑด๋ฌธ์„ hook ๋‚ด๋ถ€์— ๋„ฃ์„ ์ˆ˜ ์žˆ๋‹ค. useEffect(function persistForm() { // ๐Ÿ‘ ๋” ์ด์ƒ ์ฒซ ๋ฒˆ์งธ ๊ทœ์น™์„ ์–ด๊ธฐ์ง€ ์•Š์Šต๋‹ˆ๋‹ค if (name !== '') { localStorage.setItem('formData', name); } }); ์ œ๊ณต๋œ lint ๊ทœ์น™์„ ํ™œ์šฉํ•˜๋ฉด ์ด ๋ฌธ์ œ๋Š” ํ•ด๊ฒฐ๋จ! -> eslint-plugin-react-hooks 2. React ํ•จ์ˆ˜ ์ปดํฌ๋„ŒํŠธ ๋‚ด์—์„œ๋งŒ Hook ํ˜ธ์ถœ ์ผ๋ฐ˜ JS์—์„œ Hook ํ˜ธ์ถœ X ์ง์ ‘ ์ž‘์„ฑํ•œ custom Hook ๋‚ด์—์„œ๋Š” ํ›… ํ˜ธ์ถœ..

WEB 2020. 12. 31. 15:21
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