{"id":9715,"date":"2025-07-31T21:05:10","date_gmt":"2025-07-31T12:05:10","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=9715"},"modified":"2025-08-01T10:54:46","modified_gmt":"2025-08-01T01:54:46","slug":"typescript-enum","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/typescript-enum\/","title":{"rendered":"\u3010TypeScript\u5165\u9580\u3011enum\uff08\u5217\u6319\u578b\uff09\u3068\u306f\uff1f\u5229\u7528\u304c\u975e\u63a8\u5968\u306e\u7406\u7531\u3068\u4ee3\u66ff\u624b\u6bb5\u3082\u8a73\u3057\u304f\u89e3\u8aac"},"content":{"rendered":"\n<p>TypeScript\u306b\u306f\u3001enum\uff08\u5217\u6319\u578b\uff09\u3068\u3044\u3046\u3001\u5b9a\u6570\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>\u5217\u6319\u578b\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3082\u3088\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u306e\uff11\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u898b\u3059\u308b\u3068\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3042\u308b enum\u3067\u3059\u304c\u3001\u5b9f\u969b\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u7406\u7531\u304b\u3089\u4f7f\u7528\u306f\u907f\u3051\u305f\u65b9\u304c\u3088\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u4eca\u56de\u306f\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>enum\u3068\u306f\u305d\u3082\u305d\u3082\u4f55\u304b\uff1f<\/li>\n\n\n\n<li>enum\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/li>\n<\/ul>\n\n\n\n<p>\u3068\u3044\u3063\u305f\u5185\u5bb9\u304b\u3089\u3001\u975e\u63a8\u5968\u3068\u3055\u308c\u3066\u3044\u308b\u539f\u56e0\u3084\u4ee3\u66ff\u624b\u6bb5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__1\" class=\"wp-block-heading\">TypeScript\u306b\u304a\u3051\u308benum\uff08\u5217\u6319\u578b\uff09\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>enum\u3068\u306f\u3001\u5217\u6319\u578b\u3068\u547c\u3070\u308c\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u6307\u3059\u3082\u306e\u3067\u3059\u3002<br>\u5217\u6319\u578b\u3068\u306f\u3001\u95a2\u9023\u3059\u308b\u5b9a\u6570\u3092\u4e00\u3064\u306e\u30b0\u30eb\u30fc\u30d7\u3068\u3057\u3066\u307e\u3068\u3081\u308b\u305f\u3081\u306e\u6a5f\u80fd\u306e\u3053\u3068\u3092\u8a00\u3044\u307e\u3059\u3002<br>\u305d\u308c\u305e\u308c\u306e\u5b9a\u6570\u3092\u4efb\u610f\u306e\u30ad\u30fc\u306b\u3088\u3063\u3066\u7ba1\u7406\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u30e1\u30ea\u30c3\u30c8\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>Typescript\u3067\u306f\u3001\u4efb\u610f\u306e\u6587\u5b57\u5217\u3001\u307e\u305f\u306f\u6570\u5024\u3092\u3001\u5b9a\u6570\u306e\u5024\u3068\u3057\u3066\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u30c7\u30d5\u30a9\u30eb\u30c8 (\u30ad\u30fc\u306e\u307f\u3067enum\u3092\u5b9a\u7fa9) \u306e\u5834\u5408\u306f\u30010,1,2\u2026\u3068\u3044\u3063\u305f\u9806\u306b\u3001\u6574\u6570\u5024\u306e\u9023\u756a\u304c\u81ea\u52d5\u3067\u5024\u3068\u3057\u3066\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u57fa\u672c\u7684\u306b\u306f\u3001\u5b9a\u6570\u306e\u4e2d\u8eab\u81ea\u4f53\u306f\u4f55\u3067\u3082\u3088\u3044\u4ee3\u308f\u308a\u306b\u3001\u5024\u304c\u4e00\u610f\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u308b\u6a5f\u80fd\u3067\u3059\u3002<br>\u307e\u305f\u3001\u5b9a\u7fa9\u3057\u305fenum\u306f\u3001\u578b\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__2\" class=\"wp-block-heading\">enum\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p>\u307e\u305a\u306f\u3001enum\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 id=\"outline__2_1\" class=\"wp-block-heading\">\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n\n<p>enum\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306e\u57fa\u672c\u69cb\u6587\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u57fa\u672c\u69cb\u6587\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum \u5217\u6319\u578b\u540d {\n    \u5b9a\u6570\u540d1,\n    \u5b9a\u6570\u540d2,\n    ...\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u5b9a\u7fa9\u306e\u969b\u306b\u5024\u3092\u6307\u5b9a\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u3001\u4e0a\u8ff0\u306e\u901a\u308a\u3001\uff10\u304b\u3089\u9806\u306b\u5024\u304c\u81ea\u52d5\u3067\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan,\n    America,\n    China\n}\n\nconsole.log(Country.Japan);\nconsole.log(Country.America);\nconsole.log(Country.China);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>0\n1\n2<\/code><\/pre><\/div>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306e\u3088\u3046\u306b\u3001\u4e00\u90e8\u306e\u5b9a\u6570\u306b\u306e\u307f\u4efb\u610f\u306e\u6570\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001\u305d\u306e\u4ed6\u306e\u5b9a\u6570\u306f\uff11\u3064\u524d\u306e\u5b9a\u6570\u306e\u5024\u304b\u3089\u7d9a\u304f\u9023\u756a\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan = 1,    \/\/ 1\n    America,      \/\/ 2\n    China,        \/\/ 3\n    England = 5,  \/\/ 5\n    France        \/\/ 6\n}\n\nconsole.log(Country.Japan);\nconsole.log(Country.America);\nconsole.log(Country.France);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>1\n2\n6<\/code><\/pre><\/div>\n\n\n\n<p>\u6570\u5024\u306e\u4ee3\u308f\u308a\u306b\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan = &quot;\u65e5\u672c&quot;,   \n    America = &quot;\u30a2\u30e1\u30ea\u30ab&quot;, \n    China = &quot;\u4e2d\u56fd&quot;\n}\n\nconsole.log(Country.Japan);\nconsole.log(Country.America);\nconsole.log(Country.China);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>\u65e5\u672c\n\u30a2\u30e1\u30ea\u30ab\n\u4e2d\u56fd<\/code><\/pre><\/div>\n\n\n\n<p>\u307e\u305f\u3001\u6570\u5024\u578b\u306e\u5834\u5408\u306b\u9650\u308a\u307e\u3059\u304c\u3001\u30ad\u30fc\u304b\u3089\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u5024\u304b\u3089\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3082\u53ef\u80fd\u3068\u3059\u308b\u4ed5\u69d8 (\u53cc\u65b9\u5411\u30de\u30c3\u30d4\u30f3\u30b0) \u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan,\n    America,\n    China\n}\n\nconsole.log(Country[0]);\nconsole.log(Country[1]);\nconsole.log(Country[2]);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>Japan\nAmerica\nChina<\/code><\/pre><\/div>\n\n\n\n<h2 id=\"outline__3\" class=\"wp-block-heading\">enum\u306e\u554f\u984c\u70b9<\/h2>\n\n\n\n<p>enum\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u7d42\u3048\u305f\u3068\u3053\u308d\u3067\u3001\u7d9a\u3044\u3066\u3001TypeScript\u306b\u304a\u3051\u308benum\u304c\u975e\u63a8\u5968\u3068\u3055\u308c\u308b\u7406\u7531\u306b\u3064\u3044\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__3_1\" class=\"wp-block-heading\">enum\u306fJavaScript\u306e\u4ed5\u69d8\u304b\u3089\u96e2\u308c\u3059\u304e\u3066\u3044\u308b<\/h3>\n\n\n\n<p>\u30e1\u30b8\u30e3\u30fc\u306a\u8a00\u8a9e\u306e\u307b\u3068\u3093\u3069\u306b\u306f\u6a19\u6e96\u3067\u642d\u8f09\u3055\u308c\u3066\u3044\u308benum\u3067\u3059\u304c\u3001\u6b8b\u5ff5\u306a\u304c\u3089JavaScript\u306b\u306f\u7528\u610f\u3055\u308c\u3066\u304a\u3089\u305a\u3001TypeScript\u304c\u72ec\u81ea\u306b\u5b9f\u88c5\u3057\u3066\u3044\u308b\u6a5f\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u305f\u3081\u3001TypeScript\u306eenum\u3092JavaScript\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3068\u3001\u8a00\u8a9e\u4ed5\u69d8\u306b\u5b58\u5728\u3057\u306a\u3044\u3082\u306e\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u5373\u6642\u5b9f\u884c\u95a2\u6570\u3092\u542b\u3080\u30b3\u30fc\u30c9\u3078\u3068\u5909\u63db\u3055\u308c\u3001\u305d\u306e\u95a2\u6570\u3092\u7d4c\u7531\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b3\u30f3\u30d1\u30a4\u30eb\u524d\u306e\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>\/\/ \u6570\u5024\u306e\u5834\u5408\nenum Direction {\n  North,\n  South,\n  East,\n  West\n}\n\n\/\/ \u6587\u5b57\u5217\u306e\u5834\u5408\nenum Suit {\n  Spade = &quot;\u30b9\u30da\u30fc\u30c9&quot;,\n  Heart = &quot;\u30cf\u30fc\u30c8&quot;,\n  Diamond = &quot;\u30c0\u30a4\u30a2\u30e2\u30f3\u30c9&quot;,\n  Club = &quot;\u30af\u30e9\u30d6&quot;,\n}<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u30b3\u30f3\u30d1\u30a4\u30eb\u5f8c\u306e\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>var Direction;\n(function (Direction) {\n    Direction[Direction[&quot;North&quot;] = 0] = &quot;North&quot;;\n    Direction[Direction[&quot;South&quot;] = 1] = &quot;South&quot;;\n    Direction[Direction[&quot;East&quot;] = 2] = &quot;East&quot;;\n    Direction[Direction[&quot;West&quot;] = 3] = &quot;West&quot;;\n})(Direction || (Direction = {}));\n\n\/\/ \u6587\u5b57\u5217\u306e\u5834\u5408\nvar Suit;\n(function (Suit) {\n    Suit[&quot;Spade&quot;] = &quot;\u30b9\u30da\u30fc\u30c9&quot;;\n    Suit[&quot;Heart&quot;] = &quot;\u30cf\u30fc\u30c8&quot;;\n    Suit[&quot;Diamond&quot;] = &quot;\u30c0\u30a4\u30a2\u30e2\u30f3\u30c9&quot;;\n    Suit[&quot;Club&quot;] = &quot;\u30af\u30e9\u30d6&quot;;\n})(Suit || (Suit = {}));<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u30b5\u30a4\u30ba\u306e\u5897\u52a0\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u306b\u7e4b\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u610f\u56f3\u3057\u306a\u3044\u6319\u52d5\u304c\u8d77\u3053\u308b\u539f\u56e0\u306b\u3082\u306a\u308a\u5f97\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u3053\u3046\u3057\u305f\u30b3\u30fc\u30c9\u306fTree-shaking\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u4f7f\u7528\u306e\u6709\u7121\u306b\u95a2\u308f\u3089\u305a\u30d0\u30f3\u30c9\u30eb\u306b\u542b\u307e\u308c\u3066\u3057\u307e\u3046\u554f\u984c\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>Tree-shaking\u3068\u306f\u3001\u30d0\u30f3\u30c9\u30eb\u6642\u306b\u4f7f\u308f\u308c\u3066\u3044\u306a\u3044\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3059\u308b\u51e6\u7406\u306e\u3053\u3068\u3092\u8a00\u3044\u307e\u3059\u3002<br>Rollup\u306a\u3069\u306e\u30d0\u30f3\u30c9\u30e9\u30fc\u3067\u306f\u3001\u5373\u6642\u5b9f\u884c\u95a2\u6570\u3092 \u300c\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30b3\u30fc\u30c9\u300d \u3068\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u672a\u4f7f\u7528\u306e\u5834\u5408\u3067\u3082Tree-shaking\u304c\u9069\u7528\u3055\u308c\u305a\u3001\u30b3\u30fc\u30c9\u304c\u6b8b\u3063\u305f\u307e\u307e\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__3_2\" class=\"wp-block-heading\">\u578b\u5b89\u5168\u6027\uff08Type Safety\uff09\u306e\u70b9\u3067\u554f\u984c\u304c\u3042\u308b<\/h3>\n\n\n\n<p>\u4e00\u90e8\u306e\u8a00\u8a9e\u3067\u306f\u4f8b\u5916\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u57fa\u672c\u7684\u306b\u5217\u6319\u578b\u306f\u3001\u5ba3\u8a00\u6642\u306b\u6307\u5b9a\u3057\u305f\u5b9a\u6570\u306e\u5024\u4ee5\u5916\u306f\u5909\u6570\u306b\u4ee3\u5165\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u578b\u306e\u5b89\u5168\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u308b\u306e\u3082\u30e1\u30ea\u30c3\u30c8\u306e\uff11\u3064\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3068\u3053\u308d\u304cTypeScript\u3067\u306f\u3001\u5ba3\u8a00\u3057\u305f\u5024\u4ee5\u5916\u306e\u6570\u5024\u3082\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u578b\u5b89\u5168\u6027\u306e\u89b3\u70b9\u306b\u304a\u3044\u3066\u554f\u984c\u304c\u3042\u308b\u4ed5\u69d8\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan,\n    America,\n    China\n}\n\nconst country: Country = 10; \/\/ \u3053\u3053\u3067\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\nconsole.log(country)<\/code><\/pre><\/div>\n\n\n\n<p>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>10<\/code><\/pre><\/div>\n\n\n\n<p>\u5ba3\u8a00\u6642\u306b\u81ea\u52d5\u3067\u5272\u308a\u632f\u3089\u308c\u3066\u3044\u308b\u5024\u306f0\u301c2\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u4ee5\u5916\u306e\u6570\u5024\u3067\u3042\u308b10\u3092\u4ee3\u5165\u3057\u3066\u3082\u30a8\u30e9\u30fc\u304c\u767a\u751f\u305b\u305a\u306b\u6b63\u5e38\u52d5\u4f5c\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u554f\u984c\u306f TypeScript5.0\u672a\u6e80\u3067\u767a\u751f\u3059\u308b\u3082\u306e\u3067\u3001\u305d\u308c\u4ee5\u964d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u4ed5\u69d8\u304c\u6539\u5584\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010TypeScript 5.0\u4ee5\u964d\u306e\u5834\u5408\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan,   \n    America, \n    China\n}\n\nconst country: Country = 10;\nconsole.log(country);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>error TS2322: Type &#39;10&#39; is not assignable to type &#39;Country&#39;.<\/code><\/pre><\/div>\n\n\n\n<p>\u307e\u305f\u3001\u5024\u304b\u3089\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u3001\u4e0a\u8a18\u306e\u4f8b\u3068\u540c\u69d8\u306b\u5b58\u5728\u3057\u306a\u3044\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u3089\u305a\u306b \u300cundefined\u300d \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum Country {\n    Japan,\n    America,\n    China\n}\n\nconsole.log(Country[10]);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>undefined<\/code><\/pre><\/div>\n\n\n\n<h3 id=\"outline__3_3\" class=\"wp-block-heading\">\u6587\u5b57\u5217\u5217\u6319\u578b\u3060\u3051\u516c\u79f0\u578b\u306b\u306a\u308b<\/h3>\n\n\n\n<p>\u3042\u308b\u578b\u306b\u5225\u306e\u578b\u3092\u4ee3\u5165\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u3068\u3044\u3063\u305f \u300c\u578b\u306e\u4e92\u63db\u6027\u300d \u306e\u70b9\u306b\u304a\u3044\u3066\u3001\u5404\u8a00\u8a9e\u3054\u3068\u306b\u4ed5\u69d8\u306f\u7570\u306a\u308a\u307e\u3059\u3002<br>\u3053\u3046\u3057\u305f\u578b\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u4e3b\u306b \u300c\u516c\u79f0\u578b\u300d \u3068 \u300c\u69cb\u9020\u7684\u90e8\u5206\u578b\u300d \u306e\uff12\u3064\u306b\u5206\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u516c\u79f0\u578b\u306f\u3001Java\u3084PHP\u306a\u3069\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u578b\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002<br>\u578b\u306e\u4e92\u63db\u6027\u304c\u3042\u308b\u304b\u5426\u304b\u3092\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540c\u58eb\u306e\u7d99\u627f\u95a2\u4fc2\u306b\u57fa\u3065\u3044\u3066\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u305d\u308c\u305e\u308c\u306e\u6240\u6301\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u5168\u304f\u540c\u4e00\u306e\u30af\u30e9\u30b9A\u3068\u30af\u30e9\u30b9B\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3059\u3002<br>\u69cb\u9020\u4e0a\u306f\u540c\u3058\u3067\u3042\u308b\u3068\u8a00\u3048\u308b\u3053\u306e\uff12\u3064\u306e\u30af\u30e9\u30b9\u3067\u3059\u304c\u3001\u516c\u79f0\u578b\u306e\u5834\u5408\u306f\u4e92\u3044\u304c\u7d99\u627f\u95a2\u4fc2\u306b\u306a\u3051\u308c\u3070\u4e92\u63db\u6027\u304c\u3042\u308b\u3068\u306f\u898b\u306a\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3001\u4e0a\u8a18\u306e\u4f8b\u3092\u4e92\u63db\u6027\u304c\u3042\u308b\u3082\u306e\u3068\u898b\u306a\u3059\u306e\u304c\u69cb\u9020\u7684\u90e8\u5206\u578b\u3067\u3059\u3002<br>\u69cb\u9020\u7684\u90e8\u5206\u578b\u306f\u3001\u578b\u306e\u4e92\u63db\u6027\u3092\u7d99\u627f\u95a2\u4fc2\u3067\u306f\u306a\u304f\u69cb\u9020\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3067\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>TypeScript\u306e\u578b\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u4e00\u90e8\u306e\u4f8b\u5916\u3092\u9664\u3044\u3066\u3053\u306e\u69cb\u9020\u7684\u90e8\u5206\u578b\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>\u305d\u3057\u3066\u3001\u305d\u306e\u4f8b\u5916\u306e\uff11\u3064\u306b\u5f53\u305f\u308b\u306e\u304c\u6587\u5b57\u5217\u5217\u6319\u578b\u306a\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum NumGroup {\n    One,   \n    Two\n}\n\nenum StrGroup {\n    Hoge = &quot;hoge&quot;,\n    Fuga = &quot;fuga&quot;\n}\n\n\/\/ \u3069\u3061\u3089\u3082OK\nconst num1: NumGroup = NumGroup.One;\nconst num2: NumGroup = 0;\n\n\/\/ \u6587\u5b57\u5217\u306e\u4ee3\u5165\u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b\nconst str1: StrGroup = StrGroup.Hoge;\nconst str2: StrGroup = &quot;hoge&quot;;<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>error TS2322: Type &#39;&quot;hoge&quot;&#39; is not assignable to type &#39;StrGroup&#39;.<\/code><\/pre><\/div>\n\n\n\n<p>\u305d\u308c\u305e\u308c\u306e\u5217\u6319\u578b\u306e\u5909\u6570\u306b\u3001\u540c\u3058\u5217\u6319\u578b\u306e\u5b9a\u6570\u3092\u4ee3\u5165\u3067\u304d\u308b\u306e\u306f\u3069\u3061\u3089\u3082\u540c\u3058\u3067\u3059\u304c\u3001\u4ee3\u5165\u3059\u308b\u5024\u3092\u6570\u5024\u578b\u3067\u6307\u5b9a\u3059\u308b\u5834\u5408\u3068\u6587\u5b57\u5217\u3067\u6307\u5b9a\u3059\u308b\u5834\u5408\u3067\u306f\u3001\u52d5\u4f5c\u304c\u7570\u306a\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u5217\u6319\u578b\u306e\u4e2d\u3067\u3082\u3001\u5b9a\u6570\u306e\u5024\u304c\u3069\u3061\u3089\u306e\u578b\u3067\u3042\u308b\u304b\u3067\u51e6\u7406\u304c\u5909\u308f\u308b\u305f\u3081\u3001\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__4\" class=\"wp-block-heading\">enum\u306e\u4ee3\u66ff\u624b\u6bb5<\/h2>\n\n\n\n<p>\u4e0a\u8ff0\u306e\u7406\u7531\u304b\u3089\u3001\u57fa\u672c\u7684\u306benum\u306e\u4f7f\u7528\u306f\u975e\u63a8\u5968\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5217\u6319\u578b\u306e\u6a5f\u80fd\u305d\u306e\u3082\u306e\u306f\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u4e0a\u3067\u4fbf\u5229\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u3001\u4ee3\u66ff\u624b\u6bb5\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u308b\u3044\u304f\u3064\u304b\u306e\u8a18\u8ff0\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br>\u305f\u3060\u3057\u3001\u3044\u305a\u308c\u3082\u5168\u304f\u540c\u3058\u6a5f\u80fd\u3092\u518d\u73fe\u3067\u304d\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u308b\u3088\u3046\u306b\u3059\u308b\u3068\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 id=\"outline__4_1\" class=\"wp-block-heading\">Union\u578b\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n\n\n\n<p>\uff11\u3064\u76ee\u306e\u4ee3\u66ff\u6848\u306f\u3001Union\u578b\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>Union\u578b\u3068\u306f\u30012\u3064\u4ee5\u4e0a\u306e\u578b\u304b\u3089\u69cb\u6210\u3055\u308c\u308b\u578b\u3067\u3042\u308a\u3001\u7279\u5b9a\u306e\u5024\u304c\u305d\u308c\u3089\u306e\u578b\u306e\u3044\u305a\u308c\u304b\u306b\u5f53\u3066\u306f\u307e\u308b\u53ef\u80fd\u6027\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u8868\u8a18\u6cd5\u3067\u3059\u3002<br>\u5909\u6570\u306a\u3069\u306e\u578b\u306e\u6307\u5b9a\u3067\u3001\u901a\u5e38\u306f\uff11\u3064\u306e\u578b\u306e\u307f\u3092\u6307\u5b9a\u3059\u308b\u3068\u3053\u308d\u3092\u3001\u3053\u306e\u8868\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u8907\u6570\u306e\u578b\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>Union\u578b\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>let \u5909\u6570\u540d: string | undefined;<\/code><\/pre><\/div>\n\n\n\n<p>\u6307\u5b9a\u3057\u305f\u3044\u305d\u308c\u305e\u308c\u306e\u578b\u3092\u3001\u300c | (\u30d1\u30a4\u30d7\u8a18\u53f7)\u300d \u3067\u533a\u5207\u3063\u3066\u8a18\u8ff0\u3057\u307e\u3059\u3002<br>\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u65b0\u305f\u306b\u578b\u540d\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>type \u578b\u540d = string | undefined;<\/code><\/pre><\/div>\n\n\n\n<p>Union\u578b\u306e\u5fdc\u7528\u65b9\u6cd5\u3068\u3057\u3066\u3001\u7279\u5b9a\u306e\u5024\u3092\u578b\u306b\u6307\u5b9a\u3057\u3001\u305d\u306e\u5024\u306e\u307f\u3092\u4ee3\u5165\u53ef\u80fd\u3068\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<br>\u3053\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001enum\u3068\u540c\u3058\u3088\u3046\u306b\u4ee3\u5165\u3059\u308b\u5024\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>type Fruits = &quot;Apple&quot; | &quot;Peach&quot; | &quot;Orange&quot;;\n\nconst myFruits1: Fruits = &quot;Apple&quot;; \/\/ \u4ee3\u5165\u53ef\u80fd\nconst myFruits2: Fruits = &quot;Banana&quot;; \/\/ \u4ee3\u5165\u4e0d\u53ef<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>error TS2322: Type &#39;&quot;Banana&quot;&#39; is not assignable to type &#39;Fruits&#39;.<\/code><\/pre><\/div>\n\n\n\n<p>\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u3001\u300cFruits\u300d \u578b\u3067\u6307\u5b9a\u3057\u3066\u3044\u306a\u3044\u5024\u3092\u5909\u6570\u306b\u4ee3\u5165\u3057\u3088\u3046\u3068\u3057\u305f\u305f\u3081\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001enum\u306b\u4f3c\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u6bd4\u8f03\u7684\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b\u306e\u304c\u3001Union\u578b\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__4_2\" class=\"wp-block-heading\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n\n\n\n<p>\u5148\u307b\u3069\u306eUnion\u578b\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u4ee3\u66ff\u6848\u3068\u3057\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305a\u306f\u3001\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>const Fruits = {\n  Apple: &quot;Apple&quot;,\n  Peach: &quot;Peach&quot;,\n  Orange: &quot;Orange&quot;\n} as const\n\ntype Fruits = typeof Fruits[keyof typeof Fruits];\n\/\/ type Fruit = &quot;Apple&quot; | &quot;Peach&quot; | &quot;Orange&quot; \u3068\u540c\u3058\n\nfunction toJapanese(fruits: Fruits) {\n  switch (fruits) {\n    case Fruits.Apple:\n      return &quot;\u308a\u3093\u3054&quot;\n    case Fruits.Peach:\n      return &quot;\u3082\u3082&quot;\n    case Fruits.Orange:\n      return &quot;\u307f\u304b\u3093&quot;\n  }\n}\n\nconsole.log(toJapanese(Fruits.Apple));<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>\u308a\u3093\u3054<\/code><\/pre><\/div>\n\n\n\n<p>Union\u578b\u306e\u307f\u306e\u5834\u5408\u3068\u6bd4\u3079\u308b\u3068\u3001\u30b3\u30fc\u30c9\u91cf\u306f\u5897\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u304c\u3001\u3088\u308aenum\u306b\u8fd1\u3044\u30b3\u30fc\u30c9\u5f62\u5f0f\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br>\u3053\u306e\u65b9\u6cd5\u3092\u4f7f\u3046\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8\u306e\uff11\u3064\u3068\u3057\u3066\u3001\u5024\u304c\u5909\u66f4\u306b\u306a\u3063\u305f\u5834\u5408\u306e\u4fee\u6b63\u304c\u884c\u3044\u3084\u3059\u3044\u70b9\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4e0a\u8a18\u306e\u4f8b\u3092Union\u578b\u306e\u307f\u3067\u8a18\u8ff0\u3057\u305f\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>type Fruits = &quot;Apple&quot; | &quot;Peach&quot; | &quot;Orange&quot;;\n\nfunction toJapanese(fruits: Fruits) {\n  switch (fruits) {\n    case &quot;Apple&quot;:\n      return &quot;\u308a\u3093\u3054&quot;\n    case &quot;Peach&quot;:\n      return &quot;\u3082\u3082&quot;\n    case &quot;Orange&quot;:\n      return &quot;\u307f\u304b\u3093&quot;\n  }\n}\n\nconsole.log(toJapanese(&quot;Apple&quot;));<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u4e00\u90e8\u306e\u5024\u3092\u5909\u66f4\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u3001\u578b\u90e8\u5206\u306e\u8a18\u8ff0\u3060\u3051\u3067\u306a\u304f\u3001switch\u6587\u306e\u6761\u4ef6\u306a\u3069\u3082\u4fee\u6b63\u3059\u308b\u5fc5\u8981\u304c\u51fa\u3066\u304d\u307e\u3059\u3002<br>\u5b9a\u7fa9\u3057\u305f\u578b\u3092\u4f7f\u7528\u3059\u308b\u7b87\u6240\u304c\u591a\u3051\u308c\u3070\u591a\u3044\u307b\u3069\u3001\u305d\u306e\u624b\u9593\u3082\u9065\u304b\u306b\u5927\u304d\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3042\u308c\u3070\u3001\u6bd4\u8f03\u306a\u3069\u306f\u30ad\u30fc\u3067\u884c\u3048\u308b\u305f\u3081\uff11\u7b87\u6240\u3092\u4fee\u6b63\u3059\u308b\u306e\u307f\u3067\u6e08\u307f\u307e\u3059\u3002<br>\u3053\u3046\u3057\u305f\u30b3\u30fc\u30c9\u7ba1\u7406\u306e\u3057\u3084\u3059\u3055\u306f\u3001\u5927\u304d\u306a\u5229\u70b9\u306e\uff11\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__5\" class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u4eca\u56de\u306f\u3001TypeScript\u306b\u304a\u3051\u308benum\u306b\u3064\u3044\u3066\u89e3\u8aac\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u4e0a\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001\u73fe\u5728\u3067\u306f\u975e\u63a8\u5968\u306b\u306a\u3063\u3066\u3044\u308b\u306a\u3069\u6ce8\u610f\u70b9\u304c\u591a\u3044\u6a5f\u80fd\u3067\u3059\u306e\u3067\u3001\u4f7f\u7528\u3059\u308b\u5834\u5408\u306b\u306f\u6c17\u3092\u4ed8\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 id=\"outline__6\" class=\"wp-block-heading\">TypeScript\u306e\u52c9\u5f37\u65b9\u6cd5\u306f\uff1f<\/h2>\n\n\n<p>\u66f8\u7c4d\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u5b66\u7fd2\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6628\u4eca\u3067\u306f\u3001YouTube\u306a\u3069\u306e\u52d5\u753b\u30b5\u30a4\u30c8\u3084\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30b5\u30a4\u30c8\u306a\u3069\u3082\u5145\u5b9f\u3057\u3066\u3044\u3066\u591a\u304f\u306e\u60c5\u5831\u304c\u624b\u306b\u5165\u308a\u307e\u3059\u3002<br \/>\u305d\u3057\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3059\u308b\u306b\u306f\u3001\u77e5\u8b58\u3092\u3064\u3051\u306a\u304c\u3089\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u308b\u306a\u3069\u3001\u30a4\u30f3\u30d7\u30c3\u30c8\u3068\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u72ec\u5b66\u306e\u5834\u5408\u306f\u3001\u6709\u8b58\u8005\u306b\u8cea\u554f\u304c\u3067\u304d\u305f\u308a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u3082\u3089\u3048\u308b\u3088\u3046\u306a\u74b0\u5883\u304c\u3042\u308b\u3068\u3001\u7406\u89e3\u5ea6\u304c\u6df1\u307e\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u305f\u3060\u3001TypeScript\u306b\u9650\u3089\u305a\u3001IT\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u308b\u969b\u3001\u3069\u3046\u3057\u3066\u3082\u8ab2\u984c\u306b\u3076\u3064\u304b\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u3088\u306d\u3002\u7279\u306b\u72ec\u5b66\u3060\u3068\u3001\u308f\u304b\u3089\u306a\u3044\u90e8\u5206\u3092\u30d7\u30ed\u306b\u8cea\u554f\u3067\u304d\u308b\u6a5f\u4f1a\u3092\u78ba\u4fdd\u3057\u306b\u304f\u304f\u3001\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u304c\u7d9a\u304d\u306b\u304f\u3044\u3068\u3044\u3046\u5074\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u72ec\u5b66\u3067\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u7dad\u6301\u3059\u308b\u81ea\u4fe1\u304c\u306a\u3044\u4eba\u306b\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3068\u3044\u3046\u624b\u3082\u3042\u308a\u307e\u3059\u3002\u8cbb\u7528\u306f\u639b\u304b\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u3084\u3059\u3044\u3067\u3059\u3002\u3057\u3063\u304b\u308a\u3068\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3057\u3066\u5b9f\u8df5\u306b\u6d3b\u304b\u3057\u305f\u3044\u3068\u3044\u3046\u4eba\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<p><span class=\"markerYellow\"><strong>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u306a\u3089\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u304c\u304a\u3059\u3059\u3081\uff01<\/strong><\/span><\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/yuudou.png\" class=\"post-img\">\n\n\n<p>IT\u30b9\u30ad\u30eb\u9700\u8981\u306e\u9ad8\u307e\u308a\u3068\u3068\u3082\u306b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3082\u5897\u3048\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u3069\u306e\u30b9\u30af\u30fc\u30eb\u306b\u901a\u3046\u3079\u304d\u304b\u8ff7\u3063\u3066\u3057\u307e\u3046\u4eba\u3082\u3044\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u3093\u306a\u65b9\u306b\u306f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\uff01\u3053\u308c\u307e\u3067\u591a\u304f\u306eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u80b2\u6210\u30fb\u8f29\u51fa\u3057\u3066\u304d\u305f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3092\u958b\u8b1b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"bgBox\">\n<p><strong>\uff1c\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306e\u7279\u5fb4\uff1e<\/strong><br 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