{"id":4799,"date":"2023-04-07T22:56:45","date_gmt":"2023-04-07T13:56:45","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=4799"},"modified":"2023-04-08T11:02:27","modified_gmt":"2023-04-08T02:02:27","slug":"javascript-prototype","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/","title":{"rendered":"\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\uff08prototype\uff09\u306e\u57fa\u790e\u3001\u30e1\u30ea\u30c3\u30c8\u3084\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306b\u3088\u308b\u5b9f\u88c5\u65b9\u6cd5\u3092\u51fa\u6765\u308b\u3060\u3051\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3010JavaScript\u3011"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%81%AE%E5%9F%BA%E6%9C%AC\" >\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306e\u57fa\u672c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%82%92%E4%BD%BF%E3%81%86%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88\" >\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%83%A1%E3%83%A2%E3%83%AA%E3%81%AE%E5%8A%B9%E7%8E%87%E5%8C%96\" >\u30e1\u30e2\u30ea\u306e\u52b9\u7387\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E7%B6%99%E6%89%BF\" >\u7d99\u627f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%83%A9%E3%82%A4%E3%83%96%E3%83%A9%E3%83%AA%E3%81%AE%E6%8B%A1%E5%BC%B5\" >\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u62e1\u5f35<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%83%81%E3%82%A7%E3%83%BC%E3%83%B3\" >\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30c1\u30a7\u30fc\u30f3<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-prototype\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u697d\u5668\u306e\u30ae\u30bf\u30fc\u306b\u4f8b\u3048\u308b\u3068\u3001\u3042\u308b\u30ae\u30bf\u30fc\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306f\u300c\u305d\u306e\u30ae\u30bf\u30fc\u304c\u6301\u3064<strong>\u7279\u5b9a\u306e\u6a5f\u80fd\u3084\u7279\u6027\u3092\u5b9a\u7fa9\u3059\u308b\u3088\u3046\u306a\u8a2d\u8a08\u56f3<\/strong>\u300d\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5177\u4f53\u7684\u306b\u3069\u3046\u3044\u3046\u3053\u3068\u304b\u3068\u8a00\u3046\u3068\u3001\u4f8b\u3048\u3070\u30ae\u30bf\u30fc\u306e\u5f62\u72b6\u3001\u97f3\u8272\u3001\u4f7f\u7528\u6750\u6599\u306a\u3069\u306e\u60c5\u5831\u304c\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306b\u542b\u307e\u308c\u307e\u3059\u3002\u300c\u30b9\u30c8\u30e9\u30c8\u30ad\u30e3\u30b9\u30bf\u30fc\u300d\u3068\u3044\u3046\u30e2\u30c7\u30eb\u540d\u3067\u4f5c\u3089\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306e\u30ae\u30bf\u30fc\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306b\u306f<span class=\"marker-under-blue\">\u300c\u30b9\u30c8\u30e9\u30c8\u30ad\u30e3\u30b9\u30bf\u30fc\u300d\u3068\u3044\u3046\u30e2\u30c7\u30eb\u540d<\/span>\u3084\u3001<span class=\"marker-under-blue\">\u30dc\u30c7\u30a3\u30b9\u30bf\u30a4\u30eb<\/span>\u3001<span class=\"marker-under-blue\">3\u3064\u306e\u30b7\u30f3\u30b0\u30eb\u30b3\u30a4\u30eb\u30d4\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30c8\u30ec\u30e2\u30ed\u30e6\u30cb\u30c3\u30c8<\/span>\u3001<span class=\"marker-under-blue\">\u30cd\u30c3\u30af\u5f62\u72b6<\/span>\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u3058\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u5171\u6709\u3059\u308b\u5225\u306e\u30ae\u30bf\u30fc\u304c\u4f5c\u3089\u308c\u308b\u3068\u3001\u305d\u306e\u30ae\u30bf\u30fc\u3082\u540c\u3058\u7279\u6027\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u300c\u65b0\u3057\u3044\u30b9\u30c8\u30e9\u30c8\u30ad\u30e3\u30b9\u30bf\u30fc\u3092\u4f5c\u308b\u300d\u3068\u3044\u3046\u5834\u5408\u3001\u3042\u308b\u7a0b\u5ea6\u540c\u3058\u7279\u5fb4\u304c\u5f15\u304d\u7d99\u304c\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u69d8\u306b\u3001JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u304c\u5b58\u5728\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u6a5f\u80fd\u3084\u7279\u6027\u306f\u3001\u305d\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306b\u3088\u3063\u3066\u6c7a\u5b9a\u3055\u308c\u307e\u3059\u3002\u3042\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7d99\u627f\u3059\u308b\u5834\u5408\u3001\u524d\u8005\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306f\u5f8c\u8005\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306b\u306a\u308a\u3001\u524d\u8005\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5f8c\u8005\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u540c\u3058\u7279\u6027\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3064\u3044\u3066\u306f\u300e<a href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/\">JavaScript \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\u4f55\u304b\uff1f\u6982\u8981\u3068\u8a18\u8ff0\u65b9\u6cd5\u3092\u57fa\u790e\u304b\u3089\u89e3\u8aac<\/a>\u300f\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%81%AE%E5%9F%BA%E6%9C%AC\"><\/span>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306e\u57fa\u672c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u3057\u3066\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<script>\nfunction Guitar(manufactureYear, color) {\n  this.manufactureYear = manufactureYear;\n  this.color = color;\n}\n\nGuitar.prototype.getCondition = function() {\n  return this.manufactureYear + \"\u5e74\u306b\u3064\u304f\u3089\u308c\u305f\" + this.color + \"\u8272\u3067\u3059\";\n};\n\nlet guitar01 = new Guitar(\"1976\", \"\u30d3\u30f3\u30c6\u30fc\u30b8\u30db\u30ef\u30a4\u30c8\");\nconsole.log(guitar01.getCondition()); \/\/ \"1976\u5e74\u306b\u3064\u304f\u3089\u308c\u305f\u30d3\u30f3\u30c6\u30fc\u30b8\u30db\u30ef\u30a4\u30c8\u8272\u3067\u3059\"\n<\/script>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"prototype-01.js\" data-lang=\"JavaScript\"><code>function Guitar(manufactureYear, color) {\n  this.manufactureYear = manufactureYear;\n  this.color = color;\n}\n\nGuitar.prototype.getCondition = function() {\n  return this.manufactureYear + &quot;\u5e74\u306b\u3064\u304f\u3089\u308c\u305f&quot; + this.color + &quot;\u8272\u3067\u3059&quot;;\n};\n\nlet guitar01 = new Guitar(&quot;1976&quot;, &quot;\u30d3\u30f3\u30c6\u30fc\u30b8\u30db\u30ef\u30a4\u30c8&quot;);\nconsole.log(guitar01.getCondition()); \/\/ &quot;1976\u5e74\u306b\u3064\u304f\u3089\u308c\u305f\u30d3\u30f3\u30c6\u30fc\u30b8\u30db\u30ef\u30a4\u30c8\u8272\u3067\u3059&quot;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<code>Guitar<\/code>\u95a2\u6570\u306f\u3001<code>manufactureYear<\/code>\u3068<code>color<\/code>\u306e<a href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/#toc2\">\u30d7\u30ed\u30d1\u30c6\u30a3<\/a>\u3092\u6301\u3064\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u95a2\u6570\u3067\u3059\u3002\u305d\u306e\u5f8c\u3001<code>getCondition<\/code>\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c<code>Guitar.prototype<\/code>\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001<code>Guitar<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3059\u3079\u3066\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067<code>getCondition<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306f\u3001JavaScript\u306e<strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7c21\u5358\u306b\u62e1\u5f35\u51fa\u6765\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u304c\u5b9f\u73fe\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%82%92%E4%BD%BF%E3%81%86%E3%83%A1%E3%83%AA%E3%83%83%E3%83%88\"><\/span>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u540c\u3058\u7a2e\u985e\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u591a\u6570\u4f5c\u6210\u3059\u308b\u5834\u5408\u306b\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3059\u308b\u969b\u3001\u540c\u3058\u6a5f\u80fd\u3092\u8907\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u5171\u6709\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u304d\u306f\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3046\u3068\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3048\u3070\u3001\u540c\u3058\u6a5f\u80fd\u3092\u5171\u6709\u3059\u308b\u305f\u3081\u306b\u91cd\u8907\u3059\u308b\u30b3\u30fc\u30c9\u3092\u56de\u907f\u51fa\u6765\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3084\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540c\u58eb\u306e\u7d99\u627f\u95a2\u4fc2\u3092\u660e\u78ba\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3082\u9ad8\u307e\u308a\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u958b\u767a\u306e\u52b9\u7387\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308b\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306b\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u5b9f\u4f8b\u3092\u4ea4\u3048\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%A1%E3%83%A2%E3%83%AA%E3%81%AE%E5%8A%B9%E7%8E%87%E5%8C%96\"><\/span>\u30e1\u30e2\u30ea\u306e\u52b9\u7387\u5316<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u5171\u6709\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u6301\u305f\u305b\u308b\u5fc5\u8981\u304c\u306a\u304f\u3001\u30e1\u30e2\u30ea\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"not-prototype.js\" data-lang=\"JavaScript\"><code>function Person(name, age) {\n  this.name = name;\n  this.age = age;\n  this.greet = function() {\n    console.log(&quot;\u79c1\u306f&quot; + this.name + &quot;\u3067\u3059\u3002&quot; + this.age + &quot;\u6b73\u3067\u3059\u3002&quot;);\n  }\n}\nlet person1 = new Person(&quot;Konan&quot;, 7);\nlet person2 = new Person(&quot;Ran&quot;, 16);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u30892\u3064\uff08<code>person1<\/code>, <code>person2<\/code>\uff09\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u305d\u308c\u305e\u308c<code>name<\/code>\u3001<code>age<\/code>\u3001<code>greet<\/code>\u3068\u3044\u3046\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3067\u3059\u304c\u3053\u308c\u3089\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u305d\u308c\u305e\u308c\u306b\u5b9a\u7fa9\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6301\u3064\u306b\u3082\u95a2\u308f\u3089\u305a\u3001\u30e1\u30e2\u30ea\u3092\u5927\u91cf\u306b\u6d88\u8cbb\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\uff08<code>person3<\/code>, <code>person4<\/code>, &#8230; <code>person999<\/code>\u306a\u3069\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3001\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u5171\u6709\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001<code>Person<\/code>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"prototype-sample.js\" data-lang=\"JavaScript\"><code>function Person(name, age) {\n  this.name = name;\n  this.age = age;\n}\n\nPerson.prototype.greet = function() {\n  console.log(&quot;\u79c1\u306f&quot; + this.name + &quot;\u3067\u3059\u3002&quot; + this.age + &quot;\u6b73\u3067\u3059\u3002&quot;);\n}\n\nlet person1 = new Person(&quot;Konan&quot;, 7);\nlet person2 = new Person(&quot;Ran&quot;, 16);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001<code>Person<\/code>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u969b\u3001<code>greet()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u304b\u3089\u7d99\u627f\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8907\u6570\u4f5c\u6210\u3057\u3066\u3082\u3001\u30e1\u30e2\u30ea\u306e\u4f7f\u7528\u3092\u7bc0\u7d04\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%B6%99%E6%89%BF\"><\/span>\u7d99\u627f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7d99\u627f\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7d99\u627f\u5143\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u7d99\u627f\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3082\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u8a73\u7d30\u306b\u8aac\u660e\u3059\u308b\u3068\u975e\u5e38\u306b\u9577\u304f\u306a\u308b\u306e\u3067\u7d99\u627f\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u3055\u3089\u3063\u3068\u898b\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u5225\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"prototype.inheritance.js\" data-lang=\"JavaScript\"><code>function Animal(name) {\n  this.name = name;\n}\n\nAnimal.prototype.eat = function() {\n  console.log(this.name + &quot; is eating.&quot;);\n}\n\nfunction Bird(name) {\n  Animal.call(this, name);\n}\n\nBird.prototype = Object.create(Animal.prototype);\nBird.prototype.constructor = Bird;\n\nBird.prototype.fly = function() {\n  console.log(this.name + &quot; is flying.&quot;);\n}\n\nlet animal = new Animal(&quot;Tiger&quot;);\nanimal.eat(); \/\/ &quot;Tiger is eating.&quot;\n\nlet bird = new Bird(&quot;Eagle&quot;);\nbird.eat(); \/\/ &quot;Eagle is eating.&quot;\nbird.fly(); \/\/ &quot;Eagle is flying.&quot;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001<code>Bird<\/code>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067<code>Animal<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7d99\u627f\u3057\u3066\u3044\u307e\u3059\u3002<code>Animal<\/code>\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092<code>Bird<\/code>\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001<code>Animal<\/code>\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b<code>eat<\/code>\u3092<code>Bird<\/code>\u3067\u3082\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001<code>Bird<\/code>\u72ec\u81ea\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b<code>fly<\/code>\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7d99\u627f\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u518d\u5229\u7528\u6027\u304c\u9ad8\u307e\u308a\u3001\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%A9%E3%82%A4%E3%83%96%E3%83%A9%E3%83%AA%E3%81%AE%E6%8B%A1%E5%BC%B5\"><\/span>\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u62e1\u5f35<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f\u3001JavaScript\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u3063\u3066\u3001\u914d\u5217\u3092\u30b7\u30e3\u30c3\u30d5\u30eb\u3059\u308b\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u62e1\u5f35\u3059\u308b\u4f8b\u3067\u3059\u3002\u914d\u5217\u306e\u8981\u7d20\u3092\u30e9\u30f3\u30c0\u30e0\u306b\u4e26\u3073\u66ff\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"prototype-array-shuffle.js\" data-lang=\"JavaScript\"><code>\/\/ Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eprototype\u3092\u62e1\u5f35\u3057\u3066\u3001shuffle\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3059\u308b\nArray.prototype.shuffle = function() {\n  let array = this.slice(); \/\/ \u914d\u5217\u306e\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\n  for (let i = array.length - 1; i &gt; 0; i--) {\n    let j = Math.floor(Math.random() * (i + 1));\n    let temp = array[i];\n    array[i] = array[j];\n    array[j] = temp;\n  }\n  return array;\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nlet array = [1, 2, 3, 4, 5];\nlet shuffledArray = array.shuffle();\nconsole.log(shuffledArray); \/\/ [4, 2, 5, 1, 3] (\u30e9\u30f3\u30c0\u30e0\u306a\u9806\u5e8f\u3067\u4e26\u3073\u66ff\u3048\u3089\u308c\u305f\u914d\u5217)<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eprototype\u3092\u62e1\u5f35\u3059\u308b\u3053\u3068\u3067\u3001\u65e2\u5b58\u306e\u914d\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u3001\u65b0\u3057\u3044shuffle\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4efb\u610f\u306e\u914d\u5217\u3092array\u578b\u3092<code>shuffle()<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u30b7\u30e3\u30c3\u30d5\u30eb\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%97%E3%83%AD%E3%83%88%E3%82%BF%E3%82%A4%E3%83%97%E3%83%81%E3%82%A7%E3%83%BC%E3%83%B3\"><\/span>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30c1\u30a7\u30fc\u30f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"prototype-chain.js\" data-lang=\"JavaScript\"><code>function Animal(name) {\n  this.name = name;\n}\n\nAnimal.prototype.eat = function() {\n  console.log(this.name + &quot; is eating.&quot;);\n}\n\nfunction Bird(name) {\n  this.name = name;\n}\n\nBird.prototype = Object.create(Animal.prototype);\nBird.prototype.constructor = Bird;\n\nBird.prototype.fly = function() {\n  console.log(this.name + &quot; is flying.&quot;);\n}\n\nlet bird = new Bird(&quot;Eagle&quot;);\nbird.eat(); \/\/ &quot;Eagle is eating.&quot;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001<code>Bird<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e<code>eat<\/code>\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001<code>Bird<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f<code>eat<\/code>\u30e1\u30bd\u30c3\u30c9\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30c1\u30a7\u30fc\u30f3\u306b\u3088\u3063\u3066\u3001<code>Bird<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3067\u3042\u308b<code>Animal<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e<code>eat<\/code>\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3001\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30c1\u30a7\u30fc\u30f3\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7d99\u627f\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u518d\u5229\u7528\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u518d\u5229\u7528\u6027\u3084\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<strong>\u30e1\u30e2\u30ea\u306e\u7bc0\u7d04<\/strong>\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e<strong>\u7d99\u627f<\/strong>\u3001<strong>\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6a5f\u80fd\u62e1\u5f35<\/strong>\u3001<strong>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30c1\u30a7\u30fc\u30f3<\/strong>\u3092\u5229\u7528\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u306e\u518d\u5229\u7528\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306fJavaScript\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u306e\u3067\u3001\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u697d\u5668\u306e\u30ae\u30bf\u30fc\u306b\u4f8b\u3048\u308b\u3068\u3001\u3042\u308b\u30ae\u30bf\u30fc\u306e\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306f\u300c\u305d\u306e\u30ae\u30bf\u30fc\u304c\u6301\u3064\u7279\u5b9a\u306e\u6a5f\u80fd\u3084\u7279\u6027\u3092\u5b9a\u7fa9\u3059\u308b\u3088\u3046\u306a\u8a2d\u8a08\u56f3\u300d\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002 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