{"id":4544,"date":"2023-03-31T16:14:07","date_gmt":"2023-03-31T07:14:07","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=4544"},"modified":"2023-04-02T03:06:10","modified_gmt":"2023-04-01T18:06:10","slug":"javascript-what-is-object","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/","title":{"rendered":"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"},"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 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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-what-is-object\/#JavaScript%E3%81%AE%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E6%A6%82%E8%A6%81\" >JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6982\u8981<\/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-what-is-object\/#%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E5%9F%BA%E6%9C%AC_%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%A8%E3%81%AF\" >\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c \u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u306f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" 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href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/#%EF%BC%91%EF%BC%8E%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E4%BD%9C%E6%88%90\" >\uff11\uff0e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210<\/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-what-is-object\/#%EF%BC%92%EF%BC%8E%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%AE%E8%BF%BD%E5%8A%A0%E3%83%BB%E5%89%8A%E9%99%A4\" >\uff12\uff0e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8ffd\u52a0\u30fb\u524a\u9664<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/#%EF%BC%93%EF%BC%8E%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%AE%E5%8F%96%E5%BE%97\" >\uff13\uff0e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u53d6\u5f97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-what-is-object\/#%EF%BC%94%EF%BC%8E%E3%83%A1%E3%82%BD%E3%83%83%E3%83%89%E3%81%AE%E8%BF%BD%E5%8A%A0\" >\uff14\uff0e\u30e1\u30bd\u30c3\u30c9\u306e\u8ffd\u52a0<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u3068\u6a5f\u80fd\u3092\u307e\u3068\u3081\u305f\u8907\u5408\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u8868\u73fe\u3059\u308b\u5b9f\u4e16\u754c\u306e\u6982\u5ff5\u3084\u4e8b\u7269\u3001\u307e\u305f\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5185\u90e8\u72b6\u614b\u3092\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306b\u3064\u3044\u3066\u306f\u300e<a href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-object\/\">JavaScript\u306b\u304a\u3051\u308bObject\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u578b<\/a>\u300f\u3092\u5225\u9014\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"JavaScript%E3%81%AE%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E6%A6%82%E8%A6%81\"><\/span>JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6982\u8981<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001<span class=\"bold-blue\">\u30ad\u30fc<\/span>\u3068<span class=\"bold-blue\">\u5024<\/span>\u306e\u30da\u30a2\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<strong>\u30ad\u30fc\u306f\u901a\u5e38\u6587\u5b57\u5217<\/strong>\u3067\u3042\u308a\u3001<strong>\u5024\u306b\u306f\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u578b<\/strong>\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u306b\u306f\u3001\u6587\u5b57\u5217\u3060\u3051\u3067\u306a\u304f\u6570\u5024\u3084\u30b7\u30f3\u30dc\u30eb\u306a\u3069\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u4e2d\u306b\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u542b\u3081\u305f\u308a\u3001\u914d\u5217\u3084\u95a2\u6570\u3092\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3042\u308a\u3001\u69d8\u3005\u306a\u76ee\u7684\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u8003\u3048\u65b9\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4e2d\u5fc3\u306b\u5c55\u958b\u3055\u308c\u308b\u305f\u3081\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u6982\u5ff5\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E5%9F%BA%E6%9C%AC_%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%A8%E3%81%AF\"><\/span>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c \u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u306f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306b\u5b58\u5728\u3059\u308b\u5024\u3084\u95a2\u6570\u3067\u3059\u3002<strong>\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3067\u5b9a\u7fa9<\/strong>\u3055\u308c\u307e\u3059\u3002\u30ad\u30fc\u306f\u6587\u5b57\u5217\u307e\u305f\u306f\u30b7\u30f3\u30dc\u30eb\u3067\u3042\u308a\u3001\u5024\u306f\u4efb\u610f\u306eJavaScript\u306e\u30c7\u30fc\u30bf\u578b\uff08String\u578b\u3001Number\u578b\u3001Boolean\u578b\u306a\u3069\uff09\u3067\u3042\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u3001<strong>\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5<\/strong>\u307e\u305f\u306f<strong>\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5<\/strong>\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d\u306b\u7d9a\u3051\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u30ad\u30fc\u3092\u30c9\u30c3\u30c8\u3067\u533a\u5207\u3063\u3066\u6307\u5b9a\u3057\u307e\u3059\u3002\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d\u306b\u7d9a\u3051\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u30ad\u30fc\u3092\u5f15\u7528\u7b26\u3067\u56f2\u3093\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"js-property-00.js\" data-lang=\"JavaScript\"><code>const person = {\n  name: &#39;John&#39;,\n  age: 30,\n  sayHello: function() {\n    console.log(&#39;Hello!&#39;);\n  }\n};\n\nconsole.log(person.name); \/\/ \u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\nconsole.log(person[&#39;age&#39;]); \/\/ \u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\nperson.sayHello(); \/\/ &#39;Hello!&#39;\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<code>person<\/code>\u306f\u3001<code>name<\/code>\u3001<code>age<\/code>\u3001<code>sayHello<\/code>\u306e3\u3064\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<code>name<\/code>\u3068<code>age<\/code>\u306f\u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u5024\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u304c\u3001<code>sayHello<\/code>\u306f\u95a2\u6570\u3092\u5024\u3068\u3057\u3066\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\u307e\u305f\u306f\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30af\u30bb\u30b9\u3055\u308c\u3001\u305d\u308c\u305e\u308c\u306e\u5024\u304c\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E3%82%AD%E3%83%BC%E3%81%A8%E3%81%AF\"><\/span>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u3068\u306f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u3068\u306f\u3001\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u306e\u3046\u3061\u3001\u5024\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u8b58\u5225\u5b50\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e<strong>\u30ad\u30fc\u306f\u4e00\u610f\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u540c\u3058\u30ad\u30fc\u3092\u6301\u3064\u30da\u30a2\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306b\u8907\u6570\u3042\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093<\/strong>\u3002\u307e\u305f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u306b\u306f\u3001\u6587\u5b57\u5217\u3060\u3051\u3067\u306a\u304f\u6570\u5024\u3084\u30b7\u30f3\u30dc\u30eb\u306a\u3069\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u306b\u306f\u3001\u30b3\u30ed\u30f3\u306e\u524d\u306e\u90e8\u5206\u306b\u8a18\u8ff0\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u4f8b\u3067\u3001<code>key1<\/code>\u3001<code>key2<\/code>\u3001<code>key3<\/code>\u304c\u30ad\u30fc\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"object-keys.js\" data-lang=\"JavaScript\"><code>const myObject = {\n  key1: &#39;value1&#39;,\n  key2: 2,\n  key3: true\n};<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ad\u30fc\u5024\u306b\u5909\u6570\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u3002\u8a73\u3057\u304f\u306f\u300e<a href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-obj-key-variables\/\">JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc\u306b\u5909\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3068\u53d6\u5f97\u3059\u308b\u65b9\u6cd5<\/a>\u300f\u3092\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"JavaScript%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E5%9F%BA%E6%9C%AC%E7%9A%84%E3%81%AA%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95\"><\/span>JavaScript\u306b\u304a\u3051\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306b\u304a\u3051\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u5024\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u4ed6\u306e\u8a00\u8a9e\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u540c\u69d8\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EF%BC%91%EF%BC%8E%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E4%BD%9C%E6%88%90\"><\/span>\uff11\uff0e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001<code>{}<\/code>\u3067\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001new\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"new-object.js\" data-lang=\"JavaScript\"><code>\/\/{}\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\nconst person = {};\n\n\/\/new\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\nconst person = new Object();<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EF%BC%92%EF%BC%8E%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%AE%E8%BF%BD%E5%8A%A0%E3%83%BB%E5%89%8A%E9%99%A4\"><\/span>\uff12\uff0e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8ffd\u52a0\u30fb\u524a\u9664<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u3001\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\u307e\u305f\u306f\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u524a\u9664\u306b\u306f\u3001delete\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"js-object-property.js\" data-lang=\"JavaScript\"><code>\/\/\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u8ffd\u52a0\nperson.name = &#39;John&#39;;\nperson[&#39;age&#39;] = 30;\n\n\/\/\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u524a\u9664\ndelete person.age;<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EF%BC%93%EF%BC%8E%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%81%AE%E5%8F%96%E5%BE%97\"><\/span>\uff13\uff0e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\u307e\u305f\u306f\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"get-property.js\" data-lang=\"JavaScript\"><code>\/\/\u30c9\u30c3\u30c8\u8868\u8a18\u6cd5\nconsole.log(person.name);\n\n\/\/\u30d6\u30e9\u30b1\u30c3\u30c8\u8868\u8a18\u6cd5\nconsole.log(person[&#39;name&#39;]);<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EF%BC%94%EF%BC%8E%E3%83%A1%E3%82%BD%E3%83%83%E3%83%89%E3%81%AE%E8%BF%BD%E5%8A%A0\"><\/span>\uff14\uff0e\u30e1\u30bd\u30c3\u30c9\u306e\u8ffd\u52a0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"object-function.js\" data-lang=\"JavaScript\"><code>person.sayHello = function() {\n  console.log(&#39;Hello!&#39;);\n};\n\nperson.sayHello(); \/\/ &#39;Hello!&#39;\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u304cJavaScript\u306b\u304a\u3051\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u975e\u5e38\u306b\u5f37\u529b\u3067\u3042\u308a\u3001\u3055\u307e\u3056\u307e\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u3068\u6a5f\u80fd\u3092\u307e\u3068\u3081\u305f\u8907\u5408\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u8868\u73fe\u3059\u308b\u5b9f\u4e16\u754c\u306e\u6982\u5ff5\u3084\u4e8b\u7269\u3001\u307e\u305f\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5185\u90e8\u72b6\u614b\u3092\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306b\u3064\u3044\u3066\u306f\u300eJavaS [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4554,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[8,48],"class_list":["post-4544","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-javascript","tag-48"],"_links":{"self":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/4544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/comments?post=4544"}],"version-history":[{"count":14,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/4544\/revisions"}],"predecessor-version":[{"id":4628,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/4544\/revisions\/4628"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media\/4554"}],"wp:attachment":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media?parent=4544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/categories?post=4544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/tags?post=4544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}