{"id":21732,"date":"2021-07-03T10:13:49","date_gmt":"2021-07-03T10:13:49","guid":{"rendered":"https:\/\/www.dotcom-monitor.com\/blog\/2021\/07\/03\/reactjs%e3%82%a2%e3%83%97%e3%83%aa%e3%82%b1%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e3%81%ae%e7%9b%a3%e8%a6%96%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b%e8%aa%b2%e9%a1%8c\/"},"modified":"2026-06-15T02:46:11","modified_gmt":"2026-06-15T02:46:11","slug":"reactjs%e3%82%a2%e3%83%97%e3%83%aa%e3%82%b1%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e3%81%ae%e7%9b%a3%e8%a6%96%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b%e8%aa%b2%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/reactjs%e3%82%a2%e3%83%97%e3%83%aa%e3%82%b1%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e3%81%ae%e7%9b%a3%e8%a6%96%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b%e8%aa%b2%e9%a1%8c\/","title":{"rendered":"ReactJS\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u76e3\u8996\u306b\u95a2\u3059\u308b\u8ab2\u984c"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"21732\" class=\"elementor elementor-21732 elementor-7600\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-60241905 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"60241905\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[],&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5d121879\" data-id=\"5d121879\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-54326e76 elementor-widget elementor-widget-text-editor\" data-id=\"54326e76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>ReactJS\u306f\u3001JavaScript\u306e\u901f\u5ea6\u3068\u72ec\u81ea\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u52d5\u7684\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6307\u5411\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306b\u5fdc\u7b54\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002 <span style=\"color: #0000ff;\"><br \/><a style=\"color: #0000ff;\" href=\"https:\/\/2018.stateofjs.com\/front-end-frameworks\/react\/\" target=\"_blank\" rel=\"noopener\">JS\u30ec\u30dd\u30fc\u30c8\u306e\u72b6\u614b2018<\/a><\/span>\u306f\u3001ReactJS\u304c\u3053\u306e\u3088\u3046\u306a\u77ed\u3044\u6642\u9593\u3067\u975e\u5e38\u306b\u4eba\u6c17\u3092\u96c6\u3081\u3066\u3044\u308b\u4e3b\u306a\u7406\u7531\u3068\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6319\u3052\u3066\u3044\u307e\u3059\u3002 \u30b7\u30f3\u30b0\u30eb\u30da\u30fc\u30b8 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 (SPA) \u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u95a2\u3057\u3066\u306f\u3001React \u306f Angular \u304a\u3088\u3073\u305d\u306e\u4ed6\u306e JavaScript \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u304a\u3088\u3073\u30e9\u30a4\u30d6\u30e9\u30ea\u3088\u308a\u3082\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u5229\u70b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002 React\u306fJavaScript\u3067\u4eee\u60f3DOM\u3092\u7dad\u6301\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u76ee\u7684\u306e\u72b6\u614b\u306b\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u6700\u5c0f\u9650\u306e\u5909\u66f4\u3092\u3059\u3070\u3084\u304f\u5224\u65ad\u3067\u304d\u307e\u3059\u3002 React\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u72b6\u614b\u306fJavaScript\u306b\u4fdd\u5b58\u3055\u308c\u308b\u305f\u3081\u3001DOM\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p><p>\u5c0f\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001ReactJS \u304c\u63d0\u4f9b\u3059\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u306f\u5341\u5206\u3067\u3059\u3002 \u305f\u3060\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u8907\u96d1\u306a\u30d3\u30e5\u30fc\u3092\u542b\u3080\u3088\u3046\u306b\u9032\u5316\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u4eee\u60f3 DOM \u306e\u7dad\u6301\u3068\u4e26\u5217\u5316\u306f\u30b3\u30b9\u30c8\u306e\u304b\u304b\u308b\u554f\u984c\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u5de8\u5927\u3067\u3001\u5206\u5c90\u3055\u308c\u3001\u8907\u96d1\u306a\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0 \u30c4\u30ea\u30fc\u3067\u3059\u3002 \u30ce\u30fc\u30c9\u306b\u30d7\u30ed\u30c3\u30d7\u3092\u66f4\u65b0\u3059\u308b\u305f\u3073\u306b\u3001React\u306f\u30ce\u30fc\u30c9\u304b\u3089\u3001\u30d6\u30e9\u30f3\u30c1\u306e\u4e0b\u3001\u6700\u5f8c\u306b\u3001\u4eee\u60f3 DOM \u6bd4\u8f03\u304c\u884c\u308f\u308c\u308b\u30ea\u30fc\u30d5\u304b\u3089\u30ec\u30f3\u30c0\u30fc\u30c4\u30ea\u30fc\u3092\u518d\u69cb\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p><p>\u3057\u304b\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u30d9\u30fc\u30b9\u304c\u5927\u304d\u304f\u306a\u308b\u306b\u3064\u308c\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u8907\u96d1\u6027\u304c\u9ad8\u307e\u308a\u3001\u3088\u308a\u591a\u304f\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u6301\u3061\u3001\u3088\u308a\u591a\u304f\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u7d44\u307f\u8fbc\u3080\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u5f53\u305f\u308b\u53ef\u80fd\u6027\u306f\u3001\u62e1\u5927\u3059\u308b\u3060\u3051\u3067\u3059\u3002 \u3055\u307e\u3056\u307e\u306a\u30b5\u30a4\u30ba\u3084\u7a2e\u985e\u306e\u4f55\u767e\u4e07\u3082\u306eWeb\u5bfe\u5fdc\u30c7\u30d0\u30a4\u30b9\u4e0a\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5897\u3048\u7d9a\u3051\u308b\u6570\u3068\u305d\u308c\u3092\u639b\u3051\u5408\u308f\u305b\u308b\u3068\u3001\u6f5c\u5728\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u60aa\u5922\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p><p>\u305f\u3068\u3048\u3070\u3001\u30d6\u30e9\u30a6\u30b6\u3067 Web \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u64cd\u4f5c\u3059\u308b\u5834\u5408\u3001\u30e6\u30fc\u30b6\u30fc\u306f 1 \u79d2\u3042\u305f\u308a 60 \u30d5\u30ec\u30fc\u30e0\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u3001\u5404\u30d5\u30ec\u30fc\u30e0\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306b 16.7 \u30df\u30ea\u79d2\u3057\u304b\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002 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id=\"boomdevs_1\">\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30de\u30a6\u30f3\u30c8\u306e\u76e3\u8996<\/h3><p>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u56de\u6570\u3068\u3001\u30ea\u30bd\u30fc\u30b9\u3068\u6240\u8981\u6642\u9593\u306f\u3001\u904b\u7528\u74b0\u5883\u3067\u306e React \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3064\u3044\u3066\u591a\u304f\u306e\u3053\u3068\u3092\u8a00\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30b5\u30d6\u30c4\u30ea\u30fc\u306e\u300c\u30de\u30a6\u30f3\u30c8\u300d\u307e\u305f\u306f\u300c\u66f4\u65b0\u300d\u6642\u9593\u3092\u6e2c\u5b9a\u3059\u308b\u7d44\u307f\u8fbc\u307f\u306eReact\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3059\u3002 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c<span style=\"color: #ff0000;\"><span style=\"color: #333300;\">\u66f4\u65b0\u307e\u305f\u306f\u30de\u30a6\u30f3\u30c8\u3055\u308c\u308b\u305f\u3073\u306b\u3001<\/span><\/span>\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30fc\u306e<em>onRender<\/em>\u95a2\u6570\u306b\u306f\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u304c\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002 \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u306f\u3001React\u30a2\u30d7\u30ea\u306e\u554f\u984c\u3092\u8868\u793a\u3059\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u53ef\u80fd\u306a\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p><pre>import { unstable_Profiler as Profiler } from \"react\"\n\n&lt;Profiler id=\"Counter\" onRender={callback}&gt;\n\n    &lt;Counter \/&gt;\n\n&lt;\/Profiler&gt;<\/pre><p><em>id<\/em>\u306e\u5c0f\u9053\u5177\u306f\u30ec\u30dd\u30fc\u30c8\u3092\u8b58\u5225\u3057<em>\u3001onRender<\/em>\u95a2\u6570\u306f<em>\u30ab\u30a6\u30f3\u30bf<\/em>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30de\u30a6\u30f3\u30c8\u307e\u305f\u306f\u6539\u8a02\u3055\u308c\u305f\u3068\u304d\u306b\u5f15\u6570\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002<\/p><pre>function callback(id, phase, actualTime, baseTime, startTime, commitTime) {\n\nlog(\"id: \" + id, \"phase:\" + phase, \"actualTime:\" + actualTime,   \"baseTime: \" + baseTime, \"startTime: \" + startTime, \"commitTime: \" +  commitTime)\n\n}<\/pre><p>\u95a2\u6570\u306e\u5f15\u6570\u306f <em>\u3001Counter<\/em> \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u305f\u6642\u523b\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u53ce\u96c6\u3057\u307e\u3059\u3002 \u5404\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p><p><strong>id<\/strong>. \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u4e00\u610f\u306e ID\u3002<\/p><p><strong>\u30d5\u30a7\u30fc\u30ba<\/strong>\u3002 \u3053\u308c\u306f\u3001\u300c\u30de\u30a6\u30f3\u30c8\u300d\u30d5\u30a7\u30fc\u30ba\u307e\u305f\u306f\u300c\u66f4\u65b0\u300d\u30d5\u30a7\u30fc\u30ba\u306e\u3069\u3061\u3089\u3067\u30d5\u30a7\u30fc\u30ba\u3092\u691c\u51fa\u3057\u307e\u3059\u3002<\/p><p><strong>\u5b9f\u969b\u306e\u6642\u9593<\/strong>. \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30fc\u304c\u30b3\u30df\u30c3\u30c8\u3055\u308c\u305f\u66f4\u65b0\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\u306e\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3002<\/p><p><strong>\u30d9\u30fc\u30b9\u30bf\u30a4\u30e0<\/strong>\u3002 \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9 \u30c4\u30ea\u30fc\u5185\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e 1 \u3064\u304c\u30de\u30a6\u30f3\u30c8\u307e\u305f\u306f\u66f4\u65b0\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3002<\/p><p><strong>\u958b\u59cb\u6642\u9593<\/strong>\u3002 \u30bf\u30a4\u30e0 \u30b9\u30bf\u30f3\u30d7 \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u304c\u5b50\u5b6b\u306e\u30de\u30a6\u30f3\u30c8\/\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u6642\u9593\u306e\u6e2c\u5b9a\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<\/p><p><strong>\u30b3\u30df\u30c3\u30c8\u6642\u9593<\/strong>\u3002 React \u304c\u66f4\u65b0\u3092\u30b3\u30df\u30c3\u30c8\u3059\u308b\u306e\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3002<\/p><h3 id='react\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0'  id=\"boomdevs_2\">React\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/h3><p>\u958b\u767a\u4e2d\u306b\u3001\u3069\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u306e\u304b\u3092\u77e5\u308c\u3070\u3001\u3055\u307e\u3056\u307e\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u304b\u3089\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u904b\u7528\u74b0\u5883\u306b\u4fdd\u5b58\u3067\u304d\u307e\u3059\u3002 React \u958b\u767a\u8005\u30c4\u30fc\u30eb\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5883\u754c\u3092\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\u969b\u306b\u3001\u8272\u3092\u4ed8\u3051\u3066\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u30b7\u30f3\u30d7\u30eb\u306b\u3057\u307e\u3059\u3002 \u30e1\u30a4\u30f3\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u3068\u3001 <em>\u30ab\u30a6\u30f3\u30bf<\/em> \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068 <em>Count<\/em> \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u30a8\u30c3\u30b8\u304c\u4e00\u6642\u7684\u306b\u30cf\u30a4\u30e9\u30a4\u30c8\u3055\u308c\u307e\u3059\u3002<\/p><p>\u8868\u793a\u3055\u308c\u308b\u8272\u306e\u7a2e\u985e\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u983b\u5ea6\u3084\u983b\u5ea6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u3001\u3069\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u6700\u3082\u983b\u7e41\u306b\u66f4\u65b0\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u7c21\u5358\u306b\u8b58\u5225\u3067\u304d\u308b\u305f\u3081\u3001\u9069\u5207\u306b\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p><p><em>|\u7dd1 &#8211; \u4f4e\u5468\u6ce2\u6570\u66f4\u65b0 <\/em><\/p><p><em>|\u9752 &#8211; \u5e73\u5747\u5468\u6ce2\u6570\u66f4\u65b0 <\/em><\/p><p><em>v \u8d64 &#8211; \u975e\u5e38\u306b\u983b\u7e41\u306a\u66f4\u65b0\u3092\u793a\u3057\u307e\u3059\u3002 <\/em><\/p><h3 id='react-addons-perf-\u3092\u4f7f\u7528\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u306e\u7279\u5b9a'  id=\"boomdevs_3\">React.addons.Perf \u3092\u4f7f\u7528\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u306e\u7279\u5b9a<\/h3><p>Perf \u3092\u8d77\u52d5\u3059\u308b\u306b\u306f\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u304b\u3089 <em>Perf.start()<\/em> \u3092\u547c\u3073\u51fa\u3057\u3001\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u8a18\u9332\u3057 <em>\u3001Perf.stop()<\/em> \u3092\u547c\u3073\u51fa\u3057\u3066 Perf \u3092\u505c\u6b62\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u6b21\u306b\u3001\u6b21\u306e\u3044\u305a\u308c\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u6709\u52b9\u306a\u6e2c\u5b9a\u5024\u306e\u30bb\u30c3\u30c8\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p><pre><strong>Perf.printWasted()<\/strong><\/pre><p><em>\u3042\u306a\u305f\u304cReact.addons.Perf<\/em> \u3067\u547c\u3073\u51fa\u3059\u6700\u3082\u6709\u7528\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002 Perf.printWasted()\u306f\u3001\u30ec\u30f3\u30c0\u30c4\u30ea\u30fc\u306e\u7e2e\u5c0f\u3068\u4eee\u60f3\u306eDO\u3092\u6bd4\u8f03\u3059\u308b\u6642\u9593\u3092\u793a\u3057\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u3001React\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u4e3b\u8981\u306a\u5019\u88dc\u3068\u3057\u3066\u4e0a\u8a18\u306e\u9805\u76ee\u3067\u3059\u3002<\/p><pre><strong>Perf.printInclusive() \/ Perf.printExclusive()<\/strong><\/pre><p><em>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092<\/em> \u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\u305f\u3081\u306b\u9069\u5207\u306a\u6642\u9593 <em>\u3092\u8fd4\u3059<\/em> \u6642\u9593\u306e\u91cf\u3092\u8fd4\u3057\u307e\u3059\u3002 \u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306b\u3088\u3063\u3066\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u306f\u3001\u901a\u5e38\u3001\u4e0a\u8a18\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3057\u306a\u3044\u3053\u3068\u306b\u3088\u3063\u3066\u89e3\u6c7a\u3055\u308c\u308b\u305f\u3081\u3001\u307b\u3068\u3093\u3069\u306e\u958b\u767a\u8005\u306f\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u975e\u5e38\u306b\u4fbf\u5229\u306b\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093: <em>Perf.printWasted()<\/em>.<\/p><p>\u305f\u3060\u3057\u3001\u3053\u306e\u65b9\u6cd5\u306f\u3001\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u3067\u5927\u91cf\u306e\u8a08\u7b97\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u8b58\u5225\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002 <em>print\u306e<\/em>\u554f\u984c\u3092\u4fee\u6b63\u3057\u305f\u5f8c\u3001\u305d\u308c\u306f\u305d\u308c\u3089\u306e\u8cb4\u91cd\u306a\u30ea\u30bd\u30fc\u30b9\u3092\u5360\u6709\u3057\u3066\u3044\u308b\u3042\u306a\u305f\u306e\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u3067\u3042\u308b\u3053\u3068\u3092\u5b66\u3073\u307e\u3059\u3002 \u3042\u308b\u3044\u306f\u3001\u6a19\u6e96\u306e Chrome DevTool \u306e JavaScript \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u3092\u5229\u7528\u3057\u3066\u3001\u6700\u3082\u8ca0\u8377\u306e\u9ad8\u3044\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u76f4\u63a5\u898b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p><pre><strong>Perf.printDOM()<\/strong><\/pre><p><em>Perf.printDOM() \u306f<\/em> \u3001React \u30c4\u30ea\u30fc\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u4e2d\u306b\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u305f\u3059\u3079\u3066\u306e DOM \u64cd\u4f5c\u3092\u793a\u3057\u307e\u3059\u3002 \u3042\u306a\u305f\u304c\u304b\u306a\u308a\u306e\u6642\u9593ReactJS\u3067\u904a\u3093\u3067\u3044\u305f\u306a\u3089\u3001\u304a\u305d\u3089\u304f\u3053\u308c\u304c\u6700\u3082\u9762\u5012\u306a\u90e8\u5206\u3060\u3068\u77e5\u3063\u3066\u3044\u307e\u3059\u3002 \u30a2\u30d7\u30ea\u304c\u975e\u5e38\u306b\u8907\u96d1\u306a\u5834\u5408\u306b\u884c\u3068\u5217\u306e\u7121\u9650\u306e\u30ea\u30b9\u30c8\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001\u6b63\u78ba\u306b\u4f55\u304c\u9593\u9055\u3063\u3066\u3044\u305f\u304b\u3092\u691c\u51fa\u3059\u308b\u305f\u3081\u306b\u6c38\u9060\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p><p>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u6700\u521d\u306e\u30bb\u30c3\u30c8\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u308b\u3068\u3001\u5c06\u6765\u306e\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306f\u65e2\u5b58\u306eDOM\u30ce\u30fc\u30c9\u3092\u518d\u5229\u7528\u3057\u3001\u65b0\u3057\u3044\u30ce\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u306a\u3044\u3053\u3068\u3092\u671f\u5f85\u3057\u3066\u3044\u307e\u3059- React\u306e\u4eee\u60f3DOM\u306b\u3088\u3063\u3066\u4e0e\u3048\u3089\u308c\u3001\u3059\u3079\u3066\u306eReact\u958b\u767a\u8005\u306b\u3088\u3063\u3066\u4ed8\u4e0e\u3055\u308c\u305f\u6700\u9069\u5316\u3002<\/p><p><em>Perf.printDOM()<\/em> \u306f\u3001\u72ec\u7279\u306e\u9ad8\u4fa1\u306a\u30d6\u30e9\u30a6\u30b6\u306e\u5947\u5999\u3055\u3092\u898b\u3064\u3051\u305f\u308a\u3001\u4e3b\u8981\u3067\u4e88\u6e2c\u4e0d\u53ef\u80fd\u306aDOM\u306e\u5909\u66f4\u3092\u76e3\u8996\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p><h3 id='reactjs-web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5408\u6210\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0'  id=\"boomdevs_4\">ReactJS Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5408\u6210\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/h3><p>\u4e0a\u8a18\u306e\u30e1\u30bd\u30c3\u30c9\u306f React \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u76e3\u8996\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u304c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u7528\u4e2d\u306b\u4e00\u822c\u7684\u306a\u30e6\u30fc\u30b6\u30fc\u304c\u5b9f\u884c\u3059\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u6a21\u5023\u3067\u304d\u307e\u305b\u3093\u3002 \u5408\u6210\u76e3\u8996\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306f<span style=\"color: #0000ff;\">\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u30ec\u30b3\u30fc\u30c0\u30fc\u3068\u7d44\u307f\u5408\u308f\u305b\u3066<\/span>\u3001\u4e8b\u524d\u306b\u8a18\u9332\u3055\u308c\u305f\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u304a\u3088\u3073\u518d\u751f\u3057\u3001\u5b9f\u969b\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u30e6\u30fc\u30b6\u30fc\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3068\u5178\u578b\u7684\u306a\u30e6\u30fc\u30b6\u30fc\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u305f\u3068\u3048\u3070\u3001\u57fa\u672c\u7684\u306a\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3001\u30d5\u30a9\u30fc\u30e0\u306e\u9001\u4fe1\u3001\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0 \u30ab\u30fc\u30c8\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3001\u30aa\u30f3\u30e9\u30a4\u30f3 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\u4e0a\u8a18\u306e\u4ed6\u306e\u30c4\u30fc\u30eb\u3068\u306f\u7570\u306a\u308a\u3001\u5408\u6210\u76e3\u8996\u306b\u306f\u7a4d\u6975\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u3067\u3042\u308a\u3001\u624b\u4f5c\u696d\u3067\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u6642\u9593\u306e\u304b\u304b\u308b\u30d7\u30ed\u30bb\u30b9\u304b\u3089\u89e3\u653e\u3055\u308c\u307e\u3059\u3002<\/p><h3 id='reactjs\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u76e3\u8996-\u7d50\u8ad6'  id=\"boomdevs_5\">ReactJS\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u76e3\u8996:\u7d50\u8ad6<\/h3><p>\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u306f\u958b\u767a\u74b0\u5883\u3067 React \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u76e3\u8996\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u304c\u3001\u904b\u7528\u74b0\u5883\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u76e3\u8996\u306f\u5225\u306e\u5927\u304d\u306a\u8ab2\u984c\u3067\u3042\u308a\u3001\u3088\u308a\u91cd\u307f\u3092\u6301\u3061\u307e\u3059\u3002 \u300c\u79c1\u306e\u30de\u30b7\u30f3\u4e0a\u306e\u4f5c\u54c1\u300d\u306e\u30e1\u30f3\u30bf\u30ea\u30c6\u30a3\u306b\u5c48\u3059\u308b\u3053\u3068\u306f\u3001\u751f\u7523\u4e2d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5371\u6a5f\u306b\u7015\u3057\u3066\u3044\u308b\u3068\u304d\u306e\u6ce8\u610f\u6df1\u3044\u8a71\u3067\u3059\u3002 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href=\"https:\/\/userauth.dotcom-monitor.com\/Account\/FreeTrialSignUp\">\u4eca\u3059\u305030\u65e5\u9593\u306e\u7121\u6599\u306eDotcom-Monitor\u306e\u30c8\u30e9\u30a4\u30a2\u30eb<\/a><\/span>\u3092\u5165\u624b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>ReactJS\u306f\u3001JavaScript\u306e\u901f\u5ea6\u3068\u72ec\u81ea\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u52d5\u7684\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6307\u5411\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306b\u5fdc\u7b54\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002 JS\u30ec\u30dd\u30fc\u30c8\u306e\u72b6\u614b2018\u306f\u3001ReactJS\u304c\u3053\u306e\u3088\u3046 [&hellip;]<\/p>\n","protected":false},"author":21,"featured_media":21735,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6027],"tags":[],"class_list":["post-21732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-6027"],"_links":{"self":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/21732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/comments?post=21732"}],"version-history":[{"count":0,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/21732\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/media\/21735"}],"wp:attachment":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/media?parent=21732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/categories?post=21732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/tags?post=21732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}