[B! Hooks] shimpeiwsã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

shimpeiws id:shimpeiws

Hooksã«é–¢ã™ã‚‹shimpeiwsã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (8)

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useEffectå®Œå…¨ã‚¬ã‚¤ãƒ‰
ã‚ãªãŸã¯ Hooks ã‚’ä½¿ã£ã¦è¤‡æ•°ã®ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã‚’æ›¸ãã¾ã—ãŸã€‚ã¡ã‚‡ã£ã¨ã—ãŸã‚¢ãƒ—ãƒªã‚‚ä½œã£ãŸã“ã¨ãŒã‚ã‚‹ã§ã—ã‚‡ã†ã€‚æº€è¶³ã‚‚ã—ã¦ã„ã‚‹ã€‚API ã«ã‚‚æ…£ã‚Œã¦ã€ãã®éŽç¨‹ã§ã‚³ãƒ„ã‚‚æŽ´ã‚“ã§ãã¾ã—ãŸã€‚ã—ã‹ã‚‚é‡è¤‡ã—ãŸãƒã‚¸ãƒƒã‚¯ã‚’è»¢ç”¨ã§ãã‚‹ã‚ˆã† Custom Hooks ã‚’ä½œã‚Šã€åŒåƒšã«è‡ªæ…¢ã—ã¦è¦‹ãŸã‚Šã€‚ ã§ã‚‚ useEffect ã‚’ä½¿ã†åº¦ã€ã„ã¾ã„ã¡ãƒ”ãƒ³ã¨ãã¾ã›ã‚“ã€‚class ã®ãƒ©ã‚¤ãƒ•ã‚µã‚¤ã‚¯ãƒ«ã¨ã¯ä¼¼ã¦ã„ã‚‹ã‘ã©ã€ä½•ã‹ãŒé•ã†ã€‚ãã—ã¦ã„ã‚ã‚“ãªç–‘å•ã‚’æŠ±ãå§‹ã‚ã¾ã™ã€‚ ðŸ¤” componentDidMount ã‚’ useEffect ã§å†ç¾ã™ã‚‹æ–¹æ³•ã¯ï¼Ÿ ðŸ¤” useEffect å†…ã§æ£ç¢ºã«éžåŒæœŸå‡¦ç†ã‚’è¡Œã†æ–¹æ³•ã¨ã¯ï¼Ÿã€€[]ã£ã¦ãªã«ï¼Ÿ ðŸ¤” é–¢æ•°ã‚’ã‚¨ãƒ•ã‚§ã‚¯ãƒˆã®ä¾å˜é–¢ä¿‚ã¨ã—ã¦è¨˜ã™ã¹ãï¼Ÿ ðŸ¤” éžåŒæœŸå‡¦ç†ã®ç„¡é™ãƒ«ãƒ¼ãƒ—ãŒãŸã¾ã«èµ·ã“ã‚‹ã®ã¯ãªãœï¼Ÿ ðŸ¤” å¤ã„ state ã‹ props ãŒã‚¨ãƒ•ã‚§ã‚¯ãƒˆå†…ã«ãŸã¾ã«å…¥ã‚‹ã®ã¯ãªãœï¼Ÿ ç§ã‚‚ Hooks ã‚’ä½¿
shimpeiws 2019/10/09
Hooks

react
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ã€Reactã€‘æ–°æ©Ÿèƒ½hooks - Qiita
ã¯ã˜ã‚ã« ä¼šç¤¾ã§è‰²ã€…ãªäº‹ä»¶ã«å·»ãè¾¼ã¾ã‚Œã—ã¾ã£ã¦ãªã‹ãªã‹æ›¸ã‘ãªã‹ã£ãŸä¸å¹¸ãªæ—¥ã€…ã§ã—ãŸã€‚ ã¡ã‚‡ã£ã¨ä¹—ã‚Šé…ã‚ŒãŸæ„Ÿã‚ã‚‹ã‚“ã§ã™ãŒã€è‡ªåˆ†ã®å‹‰å¼·ã¨ç†è§£ãŒã¦ã‚‰æ–°ã—ã„æ©Ÿèƒ½ã§ã‚ã‚‹hooksã‚’æ›¸ã„ã¦ã„ãã¾ã™ã€‚ hooks hooksã¯classã‚’æ›¸ãã“ã¨ãªãstateã¨ã‹ã€è‰²ã€…ãªæ©Ÿèƒ½ã‚’ä½¿ã†ã“ã¨ãŒã§ãã‚‹æ–°ã—ã„æ©Ÿèƒ½ã§ã™ï¼React v16.7.0-alphaã‹ã‚‰ä½¿ãˆã¾ã™ã€‚ create-react-appã§ã¤ãã‚‹ã¨ã€åƒ•ãŒã‚„ã£ã¦ã¿ãŸã¨ãã¯16.6ã ã£ãŸã®ã§ã€ã¡ã‚‡ã£ã¨ã‚¢ãƒƒãƒ—ãƒ‡ãƒ¼ãƒˆã—ãªã„ã¨ã§ããªã„ã®ã§æ³¨æ„ã§ã™ã€‚ ãã—ã¦ã€ã‹ã¤ã¦ã¯SFCã¨å‘¼ã°ã‚Œã‚‹é–¢æ•°å®šç¾©ã®ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆãŸã¡ã‚‚ã€ã“ã“ã§ã¯SFCã§ã¯ãªãFCã«ãªã‚Šã¾ã™ã€‚ ãªã«ã›statelessã§ã¯ãªã„ã‹ã‚‰ããƒ»ãƒ»ãƒ»ï¼ï¼ã€‚ state ã“ã®æ©Ÿèƒ½ã‚’ä½¿ã†ã¨ã€functional componentãŒstateã‚’æ‰±ãˆã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã™ã€‚ã¡ã‚ƒã‚“ã¨re-renderã•ã‚Œã‚ˆã†ã¨ã‚‚å€¤ã‚’ä¿æŒã—ã¦ã
shimpeiws 2019/08/21
Hooks

react
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é›°å›²æ°—ã§ä½¿ã‚ãªã„ React hooks ã® useCallback/useMemo - Qiita
React hooks ã«ã¯ãƒ¡ãƒ¢åŒ–ã®ãŸã‚ã® useCallback ã¨ useM emo ã¨ã„ã†é–¢æ•°ãŒã‚ã‚Šã¾ã™ã€‚ hooks ã‚’ä½¿ã„å§‹ã‚ã¦ã€ã“ã®äºŒã¤ã®é–¢æ•°ã‚’çŸ¥ã£ãŸç§ã¯ã“ã†æ€ã„ã¾ã—ãŸã€‚ ã€Œãˆï¼Ÿç„¡æ¡ä»¶ã§ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ä¸ŠãŒã‚‹ã‚“ãªã‚‰å…¨éƒ¨ã“ã‚Œã§æ›¸ãã¹ãã‚„ã‚“ï¼ã€ ã¨ã€‚ ã¨ã„ã†ã‚ã‘ã§ã€ã—ã°ã‚‰ããã®ã‚¹ã‚¿ãƒ³ã‚¹ã§æ›¸ã„ã¦ããŸã®ã§ã™ãŒã€æžœãŸã—ã¦ã“ã®ã€Œç„¡æ¡ä»¶ã§ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãŒä¸ŠãŒã‚‹ã€ã¨ã„ã†å‰æã¯æœ¬å½“ã«æ£ã—ã„ã®ã‹ã€ã¨ã„ã†ã‹ãã‚‚ãã‚‚"ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ä¸ŠãŒã‚‹"ã¨ã¯å…·ä½“çš„ã«ä½•ã‚’ã—ã¦ãã‚Œã‚‹ã®ã‹ã‚’ç†è§£ã›ãšã«ä½¿ã£ã¦ã„ãŸã®ã§ã€ã“ã“ã§ã€Œå…¨ã¦ useCallback/useM emo ã§æ›¸ãã€ã¨ã„ã†æ–¹é‡ãŒæ£ã—ã„ã®ã‹ã€ãã‚Œã¨ã‚‚ä»–ã®æ–¹é‡ãŒå˜åœ¨ã™ã‚‹ã‹ã‚’è€ƒãˆã¦ã¿ã¾ã—ãŸã€‚ å¤§ããæ¬¡ã®3ã¤ã®è¦³ç‚¹ã§è€ƒãˆã¾ã™ã€‚ ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ å¯èªæ€§ ãƒã‚°ã®ç™ºç”Ÿã—ã‚„ã™ã• 1.ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ ã€Œãã‚‚ãã‚‚ useCallback/useM emo ã¯ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹å‘ä¸Šã®ç”¨é€”ãªã®
shimpeiws 2019/08/21
Hooks

react
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Hooksæ™‚ä»£ã®ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆ - Qiita
[2019/12/21 è¿½è¨˜] æ•°ãƒ¶æœˆãƒ†ã‚¹ãƒˆã‚’é‹ç”¨ã—ã¦ã¿ã¦ã€React Hooksã«ãŠã‘ã‚‹ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã‚’ã©ã†ã™ã¹ãã‹ã‚’æ›´æ–°ã—ãŸè¨˜äº‹ã‚’å‡ºã—ãŸã®ã§ã“ã£ã¡ã‚‚å‚è€ƒã«ã—ã¦ã¿ã¦ãã ã•ã„ ðŸ‘‰ React Hooks Testing React Hooksä½¿ã£ã¦ã¾ã™ã‹? ãƒã‚¸ãƒƒã‚¯ã‚’ã‚ãƒ¬ã‚¤ã«ã‹ã‘ã‚‹ã—ã€æœ€è¿‘ã§ã¯ReduxHooksã‚‚ç™»å ´ã—connectã‚„HOCã®åœ°ç„ã‹ã‚‰æŠœã‘å‡ºã—Hooksãªã—ã§ã¯ç”Ÿãã¦ã„ã‘ãªã„ã¨ã„ã†äººã‚‚å¤šã„ã¨æ€ã„ã¾ã™ã€‚ ã—ã‹ã—ãƒ†ã‚¹ãƒˆãŒæ›¸ãã«ãã„(ç‰¹ã«ReduxHooks)ãªã©èª²é¡ŒãŒã‚ã‚Šãƒ—ãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ç’°å¢ƒã«å–ã‚Šå…¥ã‚Œã‚‰ã‚Œã¦ã„ãªã„ãªã©ã®å£°ã‚‚èžãã¾ã™ã€‚ ãã‚“ãªHooksã®ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã§ç§è‡ªèº«ãŒè¿·ã£ãŸã‚«ã‚¹ã‚¿ãƒ Hooksã¨ReduxHooksã‚’ä½¿ã£ã¦ã„ã‚‹ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã®ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã‚’Jestãƒ»enzymeã‚’ä½¿ã£ã¦ç´¹ä»‹ã—ã¾ã™ã€‚ ã‚«ã‚¹ã‚¿ãƒ Hook ã‚«ã‚¹ã‚¿ãƒ Hookã¨ã¯Hooks APIã‚’çµ„ã¿åˆã‚ã›ã‚‹ã“
shimpeiws 2019/08/01
Hooks

react
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My Intuition on When to Use Custom React Hooks
Custom hooks are like mixins: they're a great way to share stateful and side-effectful functionality between components. Itâ€™s been almost a month since React Hooks were released, and they already seem to be taking over the worldâ€Šâ€”â€Šthanks in no small part to the power of custom hooks. Custom hooks do for state and side effects what React components did for views; they make it insanely easy to share
shimpeiws 2019/03/07
react

Hooks
ãƒªãƒ³ã‚¯
å®Ÿè·µ: React Hooks - mizchi's blog
hooks ãŒç™ºè¡¨ã•ã‚Œã¦ã‹ã‚‰è¶£å‘³ã§ã‚‚ç¾å ´ã§ã‚‚ãšã£ã¨ hooks ã‚’ä½¿ã£ã¦ã„ã¾ã™ã€‚ãŠã‹ã’ã§ã ã„ã¶ã“ãªã‚Œã¦ãã¦ã€ã ã„ãŸã„ãªã‚“ã®ãƒ©ã‚¤ãƒ•ã‚µã‚¤ã‚¯ãƒ«ã§ã‚‚è¡¨ç¾ã§ãã‚‹ã‚ˆã†ã«ãªã£ã¦ãã¾ã—ãŸã€‚ æœ€åˆã¯å˜ã« useState ãŒ state ã‚’ã€ useEffect ãŒ componentDidMount/componentDidUpdate ã‚’ç½®ãæ›ãˆã‚‹ã‚‚ã®ã€ã¨èª¬æ˜Žã‚’æ¸ˆã¾ã™ã¤ã‚‚ã‚Šã§ã—ãŸãŒã€ useEffect ã«ã¤ã„ã¦ã¯ãƒ©ã‚¤ãƒ•ã‚µã‚¤ã‚¯ãƒ«ã®ãƒ¢ãƒ‡ãƒ«ãŒãœã‚“ãœã‚“é•ã†ã®ã§ã€åˆ¥ã®èª¬æ˜Žã‚’ã™ã‚‹å¿…è¦ãŒã‚ã‚‹ã‚ˆã†ã«æ„Ÿã˜ã¦ã„ã¾ã—ãŸã€‚ ã§ã€ãã®çµæžœ React Hooks ã‚’ç†è§£ã™ã‚‹ã«ã¯ã€é–¢æ•°ã®ãƒ¡ãƒ¢åŒ–ã‚’ç†è§£ã™ã‚‹ã®ãŒæœ€ã‚‚ç°¡å˜ã ã¨æ€ã£ãŸã®ã§ã€ãã®èª¬æ˜Žã‚’ã—ã¤ã¤ã€ã‚¤ãƒ‡ã‚£ã‚ªãƒ ã‚’è§£èª¬ã—ã¦ã„ã“ã†ã¨æ€ã„ã¾ã™ã€‚ æœ€åˆã«: React Hooks ã¯ä½•ã§ã‚ã‚Šã€ä½•ã§ã¯ãªã„ã‹ é–¢æ•°ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆãŒçŠ¶æ…‹ã‚’æŒã¦ã‚‹ã‚ˆã†ã«ã™ã‚‹ã‚‚ã®ã§ã€é–¢æ•°ã®ãƒ¡ãƒ¢åŒ–ã®ãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã‚’å¤šç”¨ã—ã¾
shimpeiws 2019/02/28
Hooks

react
ãƒªãƒ³ã‚¯
React Hooksã¨ContextAPIã§Fluxã‚’ã‚„ã£ã¦ã¿ã‚‹ - ã‚³ãƒãƒ’ãƒˆé–‹ç™ºè€…ãƒ–ãƒã‚°
CTOå®¤ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®å®‰é” (@dachi_023) ã§ã™ã€‚React v16.8ã§å¾…ã¡ã«å¾…ã£ãŸHooksãŒ (20æ—¥å‰ã«) ãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸã€‚ãã‚“ãªHooksã‚’ä½¿ã£ã¦Fluxã‚„ã‚‹æ™‚ã£ã¦ã©ã†ã™ã‚‹ã‚“ã ã‚ã†ï¼Ÿã¨æ€ã£ãŸã®ã§èª¿ã¹ã¦å†™çµŒã—ã¦ã¿ã¾ã—ãŸã€‚ reactjs.org æ›¸ã„ãŸã‚³ãƒ¼ãƒ‰ create-react-app ã—ã¦å‡ºã¦ããŸã‚‚ã®ã‚’ã„ã˜ã£ã¦ä½œã‚Šã¾ã—ãŸã€‚FluxåŒ–ã™ã‚‹ã¾ã§ã«æ›¸ã„ãŸã‚³ãƒ¼ãƒ‰ã ã‘ã‚’è¦‹ãŸã„å ´åˆã¯ ã‚³ãƒŸãƒƒãƒˆãƒã‚° ãŒåˆ†ã‹ã‚Šã‚„ã™ã„ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã€‚ github.com ä½™è«‡: å®Ÿéš›æ›¸ã„ã¦ã¿ã¦ã€ŒHooksã¡ã‚ƒã‚“ã¨ç†è§£ã—ã¦ãªã‹ã£ãŸãªãã€9å‰²ãã‚‰ã„å†™çµŒã ã¨ã—ã¦ã‚‚è¦šãˆã‚‹ãŸã‚ã«æ›¸ãã¨ã„ã†ã®ã¯è‰¯ã„ã“ã¨ã ã€ã¨æ„Ÿã˜ã‚‰ã‚Œã¾ã—ãŸã€‚ ã‚„ã£ã¦ã¿ã‚‹ ãŠé¡Œ: +1 / -1 ãŒã§ãã‚‹ã‚«ã‚¦ãƒ³ã‚¿ãƒ¼ã®å®Ÿè£… useReducer() ã¨Contextã§Storeã‚’ã¤ãã‚‹ Actionã®ç™ºè¡Œ â†’ dispatch â†’ State
shimpeiws 2019/02/27
Hooks

react

flux
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React å‰¯ä½œç”¨åˆ†å‰²ãƒ‘ã‚¿ãƒ¼ãƒ³ - mizdra
React Hooksè‡ªä½“ã®è§£èª¬è¨˜äº‹ã¯ã„ãã¤ã‹ã‚ã‚‹ã‘ã©, Hooksã®ç™»å ´ã«ã‚ˆã£ã¦ReactãŒã©ã†å¤‰ã‚ã£ãŸã®ã‹ã«ã¤ã„ã¦æ›¸ã‹ã‚Œã¦ã„ã‚‹è¨˜äº‹ãŒç„¡ã‹ã£ãŸã®ã§æ›¸ã„ãŸ ç¶™æ‰¿, Mixin, HOC, render props, Hooksã®ç™»å ´ã«ã‚ˆã£ã¦, Reactã®å‰¯ä½œç”¨åˆ†å‰²ãƒ‘ã‚¿ãƒ¼ãƒ³ãŒã©ã†å¤‰é·ã—ã¦ã„ã£ãŸã®ã‹åˆ†ã‹ã‚‹ã‚ˆã†ã«ã™ã‚‹ã“ã¨ãŒã“ã®è¨˜äº‹ã®ç›®çš„
shimpeiws 2019/02/19
react

Hooks
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