{"id":13516,"date":"2021-05-30T11:01:13","date_gmt":"2021-05-30T02:01:13","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=13516"},"modified":"2023-09-20T23:57:41","modified_gmt":"2023-09-20T14:57:41","slug":"%e3%80%90react%e3%80%91%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%94%b9%e5%96%84%e5%af%be%e7%ad%96","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=13516","title":{"rendered":"\u3010React\u3011\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u5bfe\u7b56\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u4ed5\u7d44\u307f\u306a\u3069"},"content":{"rendered":"\n<p>React\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u5bfe\u7b56\u306b\u306f\u3001\u4e3b\u306b2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u56de\u6570\u3092\u6e1b\u3089\u3059<\/h2>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3002\u5f93\u6765\u306euseContext\u3084Redux\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u8fd1\u5e74\u767b\u5834\u3057\u305f<span style=\"color: #ff0000;\"><strong>\u30b5\u30fc\u30d0\u30fc\u30ad\u30e3\u30c3\u30b7\u30e5\u30de\u30cd\u30b8\u30e1\u30f3\u30c8\u30c4\u30fc\u30eb<\/strong><\/span>\u306b\u3088\u3063\u3066\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">React Query<\/h3>\n\n\n\n<p>\u901a\u5e38\u306eReact\u30a2\u30d7\u30ea\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u306f\u3053\u3061\u3089\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">useSWR<\/h3>\n\n\n\n<p>Next.js\u3092\u4f7f\u3046\u5834\u5408\u306f\u3053\u3061\u3089\u304c\u76f8\u6027\u304c\u826f\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">RTK Query<\/h3>\n\n\n\n<p>\u30b9\u30bf\u30fc\u6570\u304c\u5c11\u306a\u304f\u307e\u3060\u958b\u767a\u4e2d\u3067\u3059\u304c\u9078\u629e\u80a2\u3068\u3057\u3066\u306f\u3042\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.\u4e0d\u8981\u306a\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u6291\u5236\u3059\u308b\u3053\u3068<\/h2>\n\n\n\n<p>useContext\u3092\u4f7f\u3046\u3068\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u304c\u3088\u304f\u767a\u751f\u3059\u308b\u3002\u5bfe\u7b56\u306b\u3082\u5de5\u6570\u304c\u304b\u304b\u308b\u3002<\/p>\n\n\n\n<p>Redux\u304bRedux Tool Kit\u3092\u4f7f\u3046\u3088\u3046\u306b\u3059\u308b\u3068\u5bfe\u7b56\u304c\u697d\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u30bf\u30a4\u30df\u30f3\u30b0<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u521d\u671f\u306e\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0<\/h4>\n\n\n\n<p>\u5f53\u305f\u308a\u524d\u3067\u3059\u304c\u3001\u307e\u305a\u306f\u5fc5\u305a\u3053\u308c\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">useState\u306e\u5024\u304c\u66f4\u65b0\u3055\u308c\u305f\u6642<\/h4>\n\n\n\n<p>\u81ea\u8eab\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306euseState\u306f\u3082\u3061\u308d\u3093\u305d\u3046\u3067\u3059\u304c\u3001\u89aa\u3067\u6301\u3063\u3066\u3044\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u66f4\u65b0\u3055\u308c\u308b\u3068\u5b50\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3082\u3059\u3079\u3066\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001task\u306a\u3069\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d6\u5f97\u3059\u308bstate\u3060\u3051\u3067\u306a\u304f\u3001isLoading\u3084isError\u306a\u3069\u3088\u304f\u4f7f\u308f\u308c\u308b\u6c4e\u7528\u7684\u306a\u30b9\u30c6\u30fc\u30c8\u306e\u66f4\u65b0\u3067\u3082\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u52d5\u3044\u3066\u3057\u307e\u3046\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u4f8b\u3048\u3070\u3001isLoading\u3092true\u306b\u3057\u3066\u3001false\u306b\u3059\u308b\u3068\u3044\u3046\u52d5\u4f5c\u3092\u3057\u305f\u5834\u5408\u306f\u305d\u308c\u3060\u3051\u3067\u30d7\u30e9\u30b92\u56de\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u7b56<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">React Query\u306b\u3088\u308b\u5bfe\u7b56<\/h4>\n\n\n\n<p>\u3053\u308c\u3082React Query\u3067\u5bfe\u7b56\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002reactQuery\u306e\u8fd4\u5374\u30b9\u30c6\u30fc\u30bf\u30b9\u3068\u3057\u3066loading\u3084error\u306a\u3069\u306e\u72b6\u614b\u3092\u4fdd\u6301\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u306e\u3067React\u5074\u3067\u5225\u9014loading\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u6301\u3064\u5fc5\u8981\u304c\u306a\u3044\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">useContext\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u5bfe\u7b56\uff08\u975e\u63a8\u5968\uff09<\/h4>\n\n\n\n<p>useContext\u306eProvider\u3067\u5168\u7136\u95a2\u4fc2\u306a\u3044\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u540c\u58eb\uff08\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8A\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8B\uff09\u306e\u30b9\u30c6\u30fc\u30c8\u3092\u6301\u305f\u305b\u3066\u304a\u3044\u3066\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8A\u306b\u95a2\u4fc2\u3059\u308b\u30b9\u30c6\u30fc\u30c8\u3092\u66f4\u65b0\u3057\u305f\u3089\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8B\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3082\u884c\u308f\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u5168\u4f53\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u7dcf\u56de\u6570\u3082\u5897\u3048\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u3001\u5bfe\u7b56\u65b9\u6cd5\u3068\u3057\u3066\u306f<span style=\"color: #ff0000;\"><strong>\u4f7f\u3046\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3054\u3068\u306bProvider\u3092\u5206\u3051\u308b<\/strong><\/span>\u3068\u3044\u3046\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3060\u3001\u305d\u306e\u5834\u5408\u53b3\u5bc6\u306b\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u56de\u6570\u3092\u6291\u5236\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001useState\u306e\u5909\u6570\u3068\u95a2\u6570\u3092\u3055\u3089\u306b\u5225\u3005\u306bProvider\u306b\u5206\u3051\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u304b\u3063\u305f\u308a\u3057\u3066\u975e\u5e38\u306b\u5197\u9577\u306a\u69cb\u6210\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002Provider\u306e\u6570\u304c\u5897\u3048\u308c\u3070\u3001\u4fdd\u5b88\u6027\u3084\u958b\u767a\u52b9\u7387\u304c\u5927\u5e45\u306b\u4e0b\u304c\u308b\u306e\u3067\u3042\u307e\u308a\u63a8\u5968\u306f\u3055\u308c\u3066\u3044\u306a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Redux\u306econnect\u306b\u3088\u308b\u5bfe\u7b56\uff08\u73fe\u6642\u70b9\u3067\u306f\u4e0b\u706b\uff09<\/h4>\n\n\n\n<p>connect\u306f\u3001useContext\u3068\u9055\u3063\u3066React\u5916\u3067state\u3092\u7ba1\u7406\u3059\u308b\u306e\u3067Context\u3092\u4f7f\u3063\u305f\u3068\u304d\u306e\u3088\u3046\u306b\u3059\u3079\u3066\u306eContext\u306b\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u5f71\u97ff\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u306a\u3044\u3067\u3059\u3002\u307e\u305f\u3001pureComponent\u3084React.memo\u3068\u540c\u3058\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u306e\u3067\u4f7f\u3046\u3060\u3051\u3067\u89aa\u5b50\u9593\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u5bfe\u7b56\u304c\u3067\u304d\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u73fe\u6642\u70b9\u3067\u306f\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u3084\u3059\u3055\u3092\u91cd\u8996\u3057\u3066Hooks\u306euseSelector\u3092\u4f7f\u3046\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">useSelector + React.memo\u306b\u3088\u308b\u5bfe\u7b56\uff08\u73fe\u6642\u70b9\u3067\u306f\u63a8\u5968\uff09<\/h4>\n\n\n\n<p>useSelector\u3082useContext\u3068\u9055\u3063\u3066React\u5916\u3067state\u3092\u7ba1\u7406\u3059\u308b\u306e\u3067Context\u3092\u4f7f\u3063\u305f\u3068\u304d\u306e\u3088\u3046\u306b\u3059\u3079\u3066\u306eContext\u306b\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u5f71\u97ff\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u306a\u3044\u3067\u3059\u3002\u3057\u304b\u3057\u3001useSelector\u306f\u3042\u304f\u307e\u3067\u30d5\u30c3\u30af\u306a\u306e\u3067\u3001\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u95a2\u4fc2\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u6291\u5236\u306f\u3057\u3066\u304f\u308c\u307e\u305b\u3093\u3002\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u3060\u3068\u3001\u89aa\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u305f\u3089\u3001\u4f8b\u3048\u3042\u308b\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u306f\u95a2\u4fc2\u306a\u3044state\u306e\u66f4\u65b0\u3060\u3068\u3057\u3066\u3082\u3059\u3079\u3066\u306e\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u3066\u3057\u307e\u3046\u3002\uff09<\/p>\n\n\n\n<p>\u305d\u306e\u5834\u5408\u306f\u3001memo\u306a\u3069\u3092\u4f7f\u3063\u3066\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092memo\u5316\u3059\u308c\u3070\u3001\u5b50\u304c\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u3053\u3068\u306f\u306a\u304f\u306a\u308b\u3002\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306ememo\u5316\u306b\u95a2\u3057\u3066\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><blockquote class=\"wp-embedded-content\" data-secret=\"aAusDMvs5t\"><a href=\"http:\/\/www.code-magagine.com\/?p=13131\">\u3010React\u3011\u300cReact.memo\u300d\u306b\u3064\u3044\u3066<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;\u3010React\u3011\u300cReact.memo\u300d\u306b\u3064\u3044\u3066&#8221; &#8212; \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30de\u30ac\u30b8\u30f3\" src=\"http:\/\/www.code-magagine.com\/?p=13131&#038;embed=true#?secret=3GTOSUP6XH#?secret=aAusDMvs5t\" data-secret=\"aAusDMvs5t\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.\u518d\u8a08\u7b97\u3092\u6291\u5236\u3059\u308b\u3053\u3068<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">reselect(Redux)<\/h3>\n\n\n\n<p>Redux\u304b\u3089useSelector\u3067\u5024\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\u81ea\u4f53\u3082filter\u306a\u3069\u3067\u51e6\u7406\u30b3\u30b9\u30c8\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u306freselect\u3092\u4f7f\u3063\u3066\u30e1\u30e2\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">useMemo<\/h3>\n\n\n\n<p>reselect\u3067\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u3055\u3089\u306b\u52a0\u5de5\u3059\u308b\u5834\u5408\u3084\u3001\u5404\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u56fa\u6709\u3067\u6301\u305f\u305b\u308b\u30c7\u30fc\u30bf\u306a\u3069\u3092\u30e1\u30e2\u5316\u3059\u308b\u5834\u5408\u306a\u3069\u306b\u4f7f\u3044\u307e\u3059\u3002\u306a\u304a\u3001useMemo\u81ea\u4f53\u306b\u3082\u30b3\u30b9\u30c8\u306f\u304b\u304b\u308b\u306e\u3067\u5168\u3066\u306e\u95a2\u6570\u306b\u3064\u3051\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ul>\n<li>Store\u304b\u3089\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092map\u3084filter\u3067\u30eb\u30fc\u30d7\u3055\u305b\u308b\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">useCallback<\/h3>\n\n\n\n<p>React.memo\u306e\u5f15\u6570\u3067\u95a2\u6570\u3092\u30e1\u30e2\u5316\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u3046\u3002<\/p>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u66f8\u3044\u305f\u95a2\u6570\u306f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u305f\u3073\u306b\u6bce\u56de\u9055\u3046\u95a2\u6570\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u306a\u306e\u3067\u3001props\u3067\u95a2\u6570\u3092\u6e21\u3057\u305f\u969b\u306b\u6bce\u56de\u5024\u304c\u5909\u308f\u3063\u3066\u3044\u308b\u3068\u5224\u5b9a\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3001memo\u5316\u3057\u305f\u3068\u3057\u3066\u3082\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u304a\u3001useCallback\u81ea\u4f53\u306b\u3082\u30b3\u30b9\u30c8\u306f\u304b\u304b\u308b\u306e\u3067\u5168\u3066\u306e\u95a2\u6570\u306b\u3064\u3051\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u8003\uff1aReact\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u6d41\u308c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30f3\u30c0\u30fc\u30d5\u30a7\u30fc\u30ba<\/h3>\n\n\n\n<ol>\n<li>\u30eb\u30fc\u30c8\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304b\u3089\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u898b\u3064\u3051\u308b\u305f\u3081\u306b\u4e0b\u65b9\u306b\u30eb\u30fc\u30d7\u3057\u307e\u3059\u3002\uff08\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u30d5\u30e9\u30b0\u304c\u7acb\u3063\u3066\u3044\u307e\u3059\u3002\uff09<\/li>\n\n\n\n<li>\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u51fa\u529b(JSX)\u3092\u53ce\u96c6\u3059\u308b\u3002<\/li>\n\n\n\n<li>React\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u65b0\u3057\u3044\u30c4\u30ea\u30fc\uff08\u4eee\u60f3DOM\uff09\u306e\u5dee\u5206\u3092\u8a08\u7b97\u3059\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b3\u30df\u30c3\u30c8\u30d5\u30a7\u30fc\u30ba<\/h3>\n\n\n\n<ol>\n<li>\u8a08\u7b97\u3057\u305f\u7d50\u679c\u3092DOM\u306b\u9069\u5fdc\u3059\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u305d\u306e\u5f8c<\/h3>\n\n\n\n<ol>\n<li>componentDidMount\u3084componentDidUpdate\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u305d\u306e\u5f8c\u3001useEffect\u30d5\u30c3\u30af\u3092\u5b9f\u884c\u3059\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">React\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u52d5\u4f5c\u8a73\u7d30<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u3068\u3064\u3089\u308c\u3066\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3082\u5168\u3066\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\u3002<\/h4>\n\n\n\n<p>\u5b9f\u969b\u306f\u3001\u307b\u3068\u3093\u3069\u306eDOM\u306b\u5dee\u304c\u306a\u3044\u306e\u3067\u3001React\u306f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3067\u306f\u306a\u304f\u5dee\u5206\u3092\u8a08\u7b97\u3059\u308b\u4f5c\u696d\u3092\u884c\u3046\u52d5\u4f5c\u3068\u306a\u308b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">React\u306b\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u6307\u793a\u3092\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30af\u30e9\u30b9\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/h4>\n\n\n\n<ul>\n<li>this.setState()<\/li>\n\n\n\n<li>this.forceUpdate()<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u95a2\u6570\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/h4>\n\n\n\n<ul>\n<li>useState\u306e\u30bb\u30c3\u30bf\u30fc<\/li>\n\n\n\n<li>useReducer\u306edispatch<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u305d\u306e\u4ed6<\/h4>\n\n\n\n<ul>\n<li>ReactDom.render(&lt;App&gt;)\u3092\u518d\u5ea6\u547c\u3073\u51fa\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">React\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30b9\u30ad\u30c3\u30d7\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u3059\u3079\u3066\u306f<span style=\"color: #ff0000;\"><strong>\u300cShallow Equality\u300d<\/strong><\/span>\u3068\u3044\u3046\u6bd4\u8f03\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">shouldComponentUpdate<\/h4>\n\n\n\n<p>\u30af\u30e9\u30b9\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u306e\u4e00\u3064\u3002\u3053\u308c\u3092false\u3092\u8fd4\u305b\u3070\u3044\u3051\u308b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PureComponent<\/h4>\n\n\n\n<p>shouldComponentUpdate\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5b9f\u88c5\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">React.memo<\/h4>\n\n\n\n<p>HOC\u3067\u3059\u3002\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u3063\u3066\u65b0\u3057\u3044\u30e9\u30c3\u30d1\u30fc\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"React\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u5bfe\u7b56\u306b\u306f\u3001\u4e3b\u306b2\u3064\u3042\u308a\u307e\u3059\u3002 1.\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u56de\u6570\u3092\u6e1b\u3089\u3059 \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3002\u5f93\u6765\u306euseContext\u3084Redux\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3002 \u8fd1\u5e74\u767b\u5834\u3057 [&hellip;]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[116],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13516"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13516"}],"version-history":[{"count":23,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13516\/revisions"}],"predecessor-version":[{"id":23050,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13516\/revisions\/23050"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13516"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}