{"id":17719,"date":"2026-07-18T02:38:21","date_gmt":"2026-07-17T17:38:21","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=17719"},"modified":"2026-07-18T02:38:21","modified_gmt":"2026-07-17T17:38:21","slug":"cc-js-ecmascript","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-js-ecmascript\/","title":{"rendered":"\u30102026\u5e747\u6708\u7248\u3011JavaScript\u3068ECMAScript\u306e\u9055\u3044\u3068\u306f\uff1f\u6b74\u53f2\u30fb\u30d0\u30fc\u30b8\u30e7\u30f3\u65e9\u898b\u8868\u30fbTC39\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b9\u3092\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"\n<style>\n.g-flow-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;}\n.g-flow-item{background:linear-gradient(135deg,#1a1a1a,#2a1015);color:#fff;border-radius:8px;padding:16px 14px;min-width:130px;flex:1;text-align:center;}\n.g-flow-arrow{color:#dc2626;font-size:20px;font-weight:700;}\n.g-card-row{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 32px;}\n.g-card-row>div{flex:1;min-width:220px;}\n@media(max-width:600px){\n  .g-flow-row{flex-direction:column;}\n  .g-flow-arrow{transform:rotate(90deg);}\n  .g-card-row{flex-direction:column;}\n  .g-card-row>div{min-width:100%;}\n}\n<\/style>\n\n\n\n<div style=\"margin:0 0 32px;\">\n  <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/07\/thumb-cc-js-ecmascript.jpg\" alt=\"\u30102026\u5e747\u6708\u7248\u3011JavaScript\u3068ECMAScript\u306e\u9055\u3044\u3068\u306f\uff1f\u6b74\u53f2\u30fb\u30d0\u30fc\u30b8\u30e7\u30f3\u65e9\u898b\u8868\u30fbTC39\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b9\u3092\u5fb9\u5e95\u89e3\u8aac\" style=\"width:100%;height:auto;border-radius:12px;display:block;\">\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-radius:12px;padding:24px 28px;margin:0 0 32px;border-left:4px solid #dc2626;\">\n  <p style=\"font-size:15px;font-weight:700;color:#1a1a1a;margin:0 0 16px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9<\/p>\n  <ol style=\"margin:0;padding-left:20px;font-size:14px;line-height:2.2;list-style:none;\">\n    <li><a href=\"#sec-01\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">01<\/span>JavaScript\u3068ECMAScript\u306e\u9055\u3044\uff1a1\u5206\u3067\u308f\u304b\u308b\u672c\u8cea<\/a><\/li>\n    <li><a href=\"#sec-02\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">02<\/span>ECMAScript\u306e\u8a95\u751f\uff1a1990\u5e74\u4ee3\u306e\u30d6\u30e9\u30a6\u30b6\u6226\u4e89\u304b\u3089\u751f\u307e\u308c\u305f\u6a19\u6e96\u5316<\/a><\/li>\n    <li><a href=\"#sec-03\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">03<\/span>ECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u3068\u6b74\u53f2\u5e74\u8868\uff08ES1\u301cES2024\uff09<\/a><\/li>\n    <li><a href=\"#sec-04\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">04<\/span>TC39\u3068\u306f\uff1fECMAScript\u4ed5\u69d8\u306e\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b95\u30b9\u30c6\u30fc\u30b8<\/a><\/li>\n    <li><a href=\"#sec-05\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">05<\/span>\u4e3b\u8981\u30d0\u30fc\u30b8\u30e7\u30f3\u5225\u306e\u65b0\u6a5f\u80fd\u307e\u3068\u3081\uff1aES2015\u301cES2024\u65e9\u898b\u8868<\/a><\/li>\n    <li><a href=\"#sec-06\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">06<\/span>\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u3068\u306f\uff1fBabel\u3068TypeScript\u306e\u5f79\u5272<\/a><\/li>\n    <li><a href=\"#sec-07\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">07<\/span>\u3010\u72ec\u81ea\u3011Claude Code\u3067\u30e2\u30c0\u30f3JavaScript\u958b\u767a\u309210\u500d\u52a0\u901f\u3059\u308b<\/a><\/li>\n    <li><a href=\"#faq\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">FAQ<\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n  <\/ol>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJavaScript\u3068ECMAScript\u3063\u3066\u540c\u3058\u3058\u3083\u306a\u3044\u306e\uff1f\u300d\u300cES6\u3068ES2015\u3063\u3066\u4f55\u304c\u9055\u3046\uff1f\u300d\u2014\u2014Web\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306e\u5b66\u7fd2\u3092\u59cb\u3081\u308b\u3068\u3001\u3053\u3046\u3057\u305f\u6df7\u4e71\u304c\u5fc5\u305a\u8d77\u304d\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u7d4c\u9a13\u8005\u3067\u3082\u3001\u3053\u306e2\u3064\u306e\u6b63\u78ba\u306a\u95a2\u4fc2\u3092\u628a\u63e1\u3067\u304d\u3066\u3044\u306a\u3044\u65b9\u306f\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001JavaScript\u3068ECMAScript\u306e\u9055\u3044\u3092<strong>\u6b74\u53f2\u30fb\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u30fb\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b9<\/strong>\u306e3\u3064\u306e\u5207\u308a\u53e3\u3067\u5b8c\u5168\u89e3\u8aac\u3057\u307e\u3059\u3002ES2015\u304b\u3089ES2024\u307e\u3067\u306e\u4e3b\u8981\u6a5f\u80fd\u65e9\u898b\u8868\u30fbBabel\/TypeScript\u306e\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u89e3\u8aac\u30fb\u305d\u3057\u3066\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u4f7f\u3048\u308bClaude Code\u3067\u306eJavaScript\u958b\u767a\u5b9f\u8df5\u6cd5\u307e\u3067\u30011\u672c\u3067\u7db2\u7f85\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u306fClaude Code\u5c02\u9580\u306e\u652f\u63f4\u6a5f\u95a2\u3068\u3057\u3066\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7d4c\u55b6\u8005\u30fb\u30b9\u30bf\u30c3\u30d5\u304cJavaScript\u3092\u4f7f\u3063\u305f\u696d\u52d9\u81ea\u52d5\u5316\u30fbLP\u5236\u4f5c\u30fbWeb\u958b\u767a\u3092\u884c\u3046\u73fe\u5834\u3092\u591a\u6570\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u300c\u77e5\u8b58\u306e\u6574\u7406\u300d\u3060\u3051\u3067\u306a\u304f\u300c\u5b9f\u52d9\u3067\u306e\u4f7f\u3044\u65b9\u300d\u306e\u8996\u70b9\u3067\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300cJavaScript\u300d\u3068\u300cECMAScript\u300d\u306f\u6df7\u4e71\u3057\u3084\u3059\u3044\u3067\u3059\u304c\u3001\u4e00\u8a00\u3067\u6574\u7406\u3059\u308b\u3068\u300cECMAScript\u304c\u8a2d\u8a08\u56f3\uff08\u4ed5\u69d8\u66f8\uff09\u3001JavaScript\u304c\u305d\u306e\u8a2d\u8a08\u56f3\u306b\u5f93\u3063\u3066\u4f5c\u3089\u308c\u305f\u5b9f\u88c5\u54c1\u300d\u3067\u3059\u3002\u6599\u7406\u3067\u8a00\u3048\u3070\u3001ECMAScript\u304c\u30ec\u30b7\u30d4\u3001JavaScript\u304c\u305d\u306e\u30ec\u30b7\u30d4\u901a\u308a\u306b\u4f5c\u3063\u305f\u6599\u7406\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">ES6\u3068\u3044\u3046\u8a00\u8449\u3082\u3088\u304f\u51fa\u3066\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u306fECMAScript 2015\uff086\u756a\u76ee\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff09\u306e\u5225\u540d\u3067\u3059\u30022015\u5e74\u4ee5\u964d\u306f\u300cES2015\u30fbES2016\u2026\u300d\u3068\u3044\u3046\u5e74\u53f7\u8868\u8a18\u306b\u7d71\u4e00\u3055\u308c\u307e\u3057\u305f\u304c\u3001ES6\u3068\u3044\u3046\u53e4\u3044\u547c\u3073\u65b9\u3082\u73fe\u5834\u3067\u306f\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>JavaScript\u3068ECMAScript\u306e\u6b63\u78ba\u306a\u95a2\u4fc2\uff08\u4ed5\u69d8 vs \u5b9f\u88c5\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>1997\u301c2024\u5e74\u307e\u3067\u306eECMAScript\u306e\u6b74\u53f2\u3068\u5404\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u610f\u7fa9<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>TC39\u3068\u306f\u4f55\u304b\u30fb5\u30b9\u30c6\u30fc\u30b8\u306e\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b9\u306e\u5168\u5bb9<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>ES2015\u301cES2024\u306e\u4e3b\u8981\u65b0\u6a5f\u80fd\u306e\u65e9\u898b\u8868\uff08let\/const\u30fbarrow\u95a2\u6570\u30fbasync\/await\u30fbetc.\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>Babel\u3068TypeScript\u304c\u306a\u305c\u5b58\u5728\u3057\u3001\u3069\u3046\u4f7f\u3046\u304b\u306e\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u89e3\u8aac<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>Claude Code\u3067JavaScript\u306e\u66f8\u304d\u65b9\u3092\u5373\u5ea7\u306b\u7fd2\u5f97\u30fb\u696d\u52d9\u81ea\u52d5\u5316\u306b\u6d3b\u304b\u3059\u5b9f\u8df5\u6cd5<\/span><\/div>\n\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-01\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">01<\/span>\n  <span class=\"section-label\" style=\"display:block;\">THE DIFFERENCE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">JavaScript\u3068ECMAScript\u306e\u9055\u3044\uff1a1\u5206\u3067\u308f\u304b\u308b\u672c\u8cea<\/span>\n  <span class=\"section-desc\">\u300c\u4ed5\u69d8\u66f8\u300d\u3068\u300c\u5b9f\u88c5\u300d\u306e\u95a2\u4fc2\u304c\u3059\u3079\u3066\u306e\u51fa\u767a\u70b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d50\u8ad6\u304b\u3089\u8a00\u3044\u307e\u3059\u3002<strong>ECMAScript\u306fJavaScript\u306e\u300c\u4ed5\u69d8\u66f8\uff08\u6a19\u6e96\u898f\u683c\uff09\u300d\u3067\u3042\u308a\u3001JavaScript\u306f\u305d\u306eECMAScript\u4ed5\u69d8\u306b\u6e96\u62e0\u3057\u3066\u4f5c\u3089\u308c\u305f\u300c\u5b9f\u88c5\u300d\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3046\u5c11\u3057\u5177\u4f53\u7684\u306b\u8aac\u660e\u3057\u307e\u3059\u3002ECMAScript\u306f\u300cJavaScript \u3068\u3044\u3046\u8a00\u8a9e\u306f\u3053\u3046\u3044\u3046\u6587\u6cd5\u3067\u3001\u3053\u3046\u3044\u3046\u52d5\u4f5c\u3092\u3059\u3079\u304d\u3060\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3092\u5b9a\u3081\u305f\u6587\u66f8\u3067\u3059\u3002\u3053\u306e\u6587\u66f8\u306fECMA\u3068\u3044\u3046\u56fd\u969b\u6a19\u6e96\u5316\u56e3\u4f53\u304c\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u306eJavaScript\u306f\u3001\u3053\u306e\u30eb\u30fc\u30eb\u306b\u5f93\u3063\u3066\u30d6\u30e9\u30a6\u30b6\u30e1\u30fc\u30ab\u30fc\uff08Google\u30fbMozilla\u30fbApple\u7b49\uff09\u304c\u5b9f\u969b\u306b\u4f5c\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u5b9f\u88c5\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u6982\u5ff5<\/th><th>ECMAScript<\/th><th>JavaScript<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u5f79\u5272<\/td><td>\u4ed5\u69d8\u66f8\u30fb\u6a19\u6e96\u898f\u683c<\/td><td>\u5b9f\u88c5\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e<\/td><\/tr>\n<tr><td>\u7ba1\u7406\u4e3b\u4f53<\/td><td>Ecma International\uff08TC39\u59d4\u54e1\u4f1a\uff09<\/td><td>\u30d6\u30e9\u30a6\u30b6\u30d9\u30f3\u30c0\u30fc\uff08Google\/Mozilla\/Apple\u7b49\uff09<\/td><\/tr>\n<tr><td>\u6587\u66f8\u304b\u8a00\u8a9e\u304b<\/td><td>\u6587\u66f8\uff08PDF\/\u4ed5\u69d8\u66f8\uff09<\/td><td>\u5b9f\u969b\u306b\u52d5\u304f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e<\/td><\/tr>\n<tr><td>\u6bd4\u55a9<\/td><td>\u30ec\u30b7\u30d4\u30fb\u8a2d\u8a08\u56f3<\/td><td>\u5b9f\u969b\u306b\u4f5c\u3089\u308c\u305f\u6599\u7406\u30fb\u88fd\u54c1<\/td><\/tr>\n<tr><td>\u6b63\u5f0f\u540d\u79f0<\/td><td>ECMAScript\uff08ECMA-262\uff09<\/td><td>JavaScript\u2122\uff08\u5546\u6a19\u306fOracle\u6240\u6709\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>ECMAScript<\/strong>\uff1aEcma International\uff081994\u5e74\u8a2d\u7acb\u306e\u56fd\u969b\u6a19\u6e96\u5316\u56e3\u4f53\uff09\u304c\u7ba1\u7406\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4ed5\u69d8\u66f8\u3002\u6b63\u5f0f\u540d\u79f0\u306fECMA-262\u3002JavaScript\u3060\u3051\u3067\u306a\u304f\u3001ActionScript\uff08Flash\u7528\uff09\u30fbJScript\uff08IE\u7528\uff09\u3082ECMAScript\u4ed5\u69d8\u3092\u5b9f\u88c5\u3057\u305f\u8a00\u8a9e\u3002\u73fe\u5728\u306f\u5b9f\u8cea\u7684\u306bJavaScript\u306e\u6a19\u6e96\u4ed5\u69d8\u3092\u6307\u3059\u8a00\u8449\u3068\u3057\u3066\u4f7f\u308f\u308c\u3066\u3044\u308b\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJavaScript\u3068\u3044\u3046\u5546\u6a19\u306fOracle\u304c\u6301\u3063\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u4e8b\u5b9f\u3082\u6df7\u4e71\u306e\u539f\u56e0\u306e\u4e00\u3064\u3067\u3059\u3002Netscape\u304c\u958b\u767a\u3057\u305fJavaScript\u306e\u5546\u6a19\u306f\u3001Sun Microsystems\u3092\u7d4c\u7531\u3057\u3066Oracle\u304c\u4fdd\u6709\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u6a19\u6e96\u5316\u56e3\u4f53\u3067\u3042\u308bEcma\u306f\u5546\u6a19\u306e\u554f\u984c\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u300cECMAScript\u300d\u3068\u3044\u3046\u5225\u540d\u3067\u4ed5\u69d8\u3092\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u65e5\u5e38\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u300cJavaScript\u300d\u3068\u547c\u3079\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u6b63\u5f0f\u306a\u6a19\u6e96\u4ed5\u69d8\u66f8\u306e\u540d\u524d\u306f\u300cECMAScript\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u899a\u3048\u65b9\uff1a\u300cJavaScript = ECMAScript + DOM + BOM\u300d<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u304fJavaScript\u306f\u3001ECMAScript\uff08\u30b3\u30a2\u8a00\u8a9e\u4ed5\u69d8\uff09\uff0bDOM\uff08HTML\u3092\u64cd\u4f5c\u3059\u308bAPI\uff09\uff0bBOM\uff08\u30d6\u30e9\u30a6\u30b6\u81ea\u4f53\u3092\u64cd\u4f5c\u3059\u308bAPI\uff09\u306e3\u3064\u304c\u7d44\u307f\u5408\u308f\u3055\u3063\u305f\u3082\u306e\u3067\u3059\u3002Node.js\u3067\u52d5\u304fJavaScript\u306f\u300cECMAScript + Node\u72ec\u81eaAPI\u300d\u3068\u3044\u3046\u69cb\u6210\u3067\u3059\u3002ECMAScript\u306f\u3069\u306e\u5b9f\u884c\u74b0\u5883\u306b\u3082\u5171\u901a\u3059\u308b\u30b3\u30a2\u90e8\u5206\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-02\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">02<\/span>\n  <span class=\"section-label\" style=\"display:block;\">HISTORY<\/span>\n  <span class=\"section-title\" style=\"display:block;\">ECMAScript\u306e\u8a95\u751f\uff1a1990\u5e74\u4ee3\u306e\u30d6\u30e9\u30a6\u30b6\u6226\u4e89\u304b\u3089\u751f\u307e\u308c\u305f\u6a19\u6e96\u5316<\/span>\n  <span class=\"section-desc\">Netscape\u306e\u5931\u6557\u3068ECMA\u3078\u306e\u4f9d\u983c\u304b\u3089\u59cb\u307e\u3063\u305f\u6a19\u6e96\u5316\u306e\u7d4c\u7def<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u306a\u305cECMAScript\u3068\u3044\u3046\u4ed5\u69d8\u304c\u5fc5\u8981\u306b\u306a\u3063\u305f\u306e\u304b\u3001\u6b74\u53f2\u3092\u8ffd\u3044\u306a\u304c\u3089\u7406\u89e3\u3057\u307e\u3059\u3002\u3053\u306e\u80cc\u666f\u3092\u77e5\u308b\u3068\u300c\u306a\u305cJavaScript\u3068ECMAScript\u3068\u3044\u30462\u3064\u306e\u540d\u524d\u304c\u3042\u308b\u306e\u304b\u300d\u304c\u3059\u3063\u304d\u308a\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2-1. JavaScript\u306e\u8a95\u751f\uff081995\u5e74\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306f1995\u5e74\u306b<strong>Netscape Communications<\/strong>\u306eBrendan Eich\u304c\u958b\u767a\u3057\u307e\u3057\u305f\u3002\u5f53\u521d\u306e\u540d\u524d\u306f\u300cMocha\u300d\u2192\u300cLiveScript\u300d\u3067\u3001\u6700\u7d42\u7684\u306b\u300cJavaScript\u300d\u306b\u6539\u540d\u3055\u308c\u307e\u3057\u305f\u3002\u540d\u524d\u306bJava\u304c\u5165\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u5f53\u6642\u7d76\u5927\u306a\u4eba\u6c17\u3092\u8a87\u3063\u3066\u3044\u305fJava\u306e\u30d6\u30e9\u30f3\u30c9\u529b\u3092\u501f\u308a\u308b\u305f\u3081\u306e\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u5224\u65ad\u3067\u3001<strong>Java\u3068JavaScript\u306f\u6280\u8853\u7684\u306b\u4f55\u306e\u95a2\u4fc2\u3082\u3042\u308a\u307e\u305b\u3093<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Netscape\u306e\u30d6\u30e9\u30a6\u30b6\uff08Netscape Navigator\uff09\u306bJavaScript\u304c\u642d\u8f09\u3055\u308c\u308b\u3068\u3001Microsoft\u306fInternet Explorer\u306bJScript\u3068\u3044\u3046\u72ec\u81ea\u5b9f\u88c5\u3092\u7d44\u307f\u8fbc\u307f\u307e\u3057\u305f\u3002\u3053\u308c\u304c\u300c\u30d6\u30e9\u30a6\u30b6\u6226\u4e89\u300d\u306e\u59cb\u307e\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2-2. \u30d6\u30e9\u30a6\u30b6\u6226\u4e89\u3068\u4e92\u63db\u6027\u306e\u5d29\u58ca\uff081996\u301c1998\u5e74\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Netscape\u3068Microsoft\u304c\u305d\u308c\u305e\u308c\u72ec\u81ea\u62e1\u5f35\u3092\u52a0\u3048\u7d9a\u3051\u305f\u7d50\u679c\u3001JavaScript\u3068JScript\u306f\u7d30\u90e8\u3067\u7570\u306a\u308b\u52d5\u4f5c\u3092\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002Web\u30c7\u30b6\u30a4\u30ca\u30fc\u306f\u300c\u3053\u306e\u30b3\u30fc\u30c9\u306fNetscape\u3067\u306f\u52d5\u304f\u304cIE\u3067\u306f\u52d5\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u554f\u984c\u306b\u65e5\u5e38\u7684\u306b\u76f4\u9762\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4e92\u63db\u6027\u306e\u5d29\u58ca\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001Netscape\u306f1996\u5e74\u306b\u8a00\u8a9e\u306e\u6a19\u6e96\u5316\u3092Ecma International\uff08\u5f53\u6642\u306fECMA\uff09\u306b\u4f9d\u983c\u3057\u307e\u3059\u3002\u3053\u308c\u304c<strong>ECMAScript\u306e\u59cb\u307e\u308a<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>1995\u5e74<\/strong><br><span style=\"font-size:12px;\">Brendan Eich \u304c<br>10\u65e5\u3067JavaScript\u3092\u958b\u767a<br>\uff08Netscape Navigator\uff09<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>1996\u5e74<\/strong><br><span style=\"font-size:12px;\">Microsoft\u304cJScript<br>\u3092IE\u306b\u642d\u8f09<br>\u2192\u4e92\u63db\u6027\u5d29\u58ca<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>1996\u5e74<\/strong><br><span style=\"font-size:12px;\">Netscape\u304cECMA\u306b<br>\u6a19\u6e96\u5316\u3092\u4f9d\u983c<br>\u2192TC39\u8a2d\u7acb<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>1997\u5e74<\/strong><br><span style=\"font-size:12px;\">ECMAScript 1<br>\uff08ES1\uff09\u3092\u6b63\u5f0f\u516c\u958b<br>\u2192\u6a19\u6e96\u5316\u5b8c\u6210<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u73fe\u5728<\/strong><br><span style=\"font-size:12px;\">\u6bce\u5e746\u6708\u306b<br>\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u516c\u958b<br>ES2024\u307e\u3067<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>TC39\uff08Technical Committee 39\uff09<\/strong>\uff1aECMAScript\u4ed5\u69d8\u3092\u7ba1\u7406\u30fb\u7b56\u5b9a\u3059\u308bEcma International\u306e\u6280\u8853\u59d4\u54e1\u4f1a\u3002Google\u30fbMozilla\u30fbApple\u30fbMicrosoft\u30fbSamsung\u30fbMeta\u7b49\u306e\u30c6\u30c3\u30af\u4f01\u696d\u306e\u4ee3\u8868\u8005\u304c\u53c2\u52a0\u3002\u65b0\u3057\u3044JavaScript\u6a5f\u80fd\u306e\u63d0\u6848\u30fb\u5be9\u8b70\u30fb\u627f\u8a8d\u3092\u884c\u3044\u3001\u6bce\u5e746\u6708\u306b\u65b0\u3057\u3044ECMAScript\u3092\u516c\u958b\u3059\u308b\u3002TC39\u306e\u8b70\u4e8b\u9332\u306fGitHub\u3067\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-03\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">03<\/span>\n  <span class=\"section-label\" style=\"display:block;\">VERSIONS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">ECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u3068\u6b74\u53f2\u5e74\u8868\uff08ES1\u301cES2024\uff09<\/span>\n  <span class=\"section-desc\">ES6=ES2015\u306e\u8b0e\u3068\u3001\u306a\u305c\u5e74\u53f7\u8868\u8a18\u306b\u5909\u308f\u3063\u305f\u306e\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u306f\u300cES5\u300d\u300cES6\u300d\u300cES2015\u300d\u306e\u3088\u3046\u306b\u8907\u6570\u306e\u547c\u3073\u65b9\u304c\u3042\u308a\u3001\u6df7\u4e71\u3057\u3084\u3059\u3044\u3067\u3059\u3002\u3053\u3053\u3067\u5b8c\u5168\u306b\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. \u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u306e2\u3064\u306e\u4f53\u7cfb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u8868\u8a18\u306f2015\u5e74\u3092\u5883\u306b\u5909\u308f\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>2015\u5e74\u4ee5\u524d\uff08ES1\u301cES6\uff09\uff1a\u756a\u53f7\u4f53\u7cfb<\/strong>\u2014\u2014ES1\u30fbES2\u30fbES3\u30fbES4\uff08\u672a\u516c\u958b\uff09\u30fbES5\u30fbES5.1\u30fbES6 \u3068\u3044\u3046\u5f62\u5f0f\u3067\u547c\u3070\u308c\u3066\u3044\u305f<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>2015\u5e74\u4ee5\u964d\uff08ES2015\u301cES2024\uff09\uff1a\u5e74\u53f7\u4f53\u7cfb<\/strong>\u2014\u2014\u6bce\u5e746\u6708\u306b\u516c\u958b\u3059\u308b\u305f\u3081\u3001\u516c\u958b\u5e74\u3092\u305d\u306e\u307e\u307e\u540d\u524d\u306b\u3057\u305f\uff08ES2015\u30fbES2016\u30fbES2017\u2026\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>ES6 = ES2015\u306f\u540c\u4e00\u30d0\u30fc\u30b8\u30e7\u30f3<\/strong>\u2014\u2014ES6\u3068\u3044\u3046\u306e\u306fES2015\u306e\u65e7\u79f0\u3002\u73fe\u5834\u3067\u306f\u4eca\u3082ES6\u3068\u3044\u3046\u547c\u3073\u65b9\u304c\u901a\u7528\u3059\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u6b63\u5f0f\u540d\u79f0<\/th><th>\u65e7\u79f0\uff08\u901a\u79f0\uff09<\/th><th>\u516c\u958b\u5e74<\/th><th>\u91cd\u8981\u5ea6<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>ECMAScript 1<\/td><td>ES1<\/td><td>1997\u5e74<\/td><td>\u521d\u7248<\/td><\/tr>\n<tr><td>ECMAScript 2<\/td><td>ES2<\/td><td>1998\u5e74<\/td><td>\u30de\u30a4\u30ca\u30fc\u6539\u8a02<\/td><\/tr>\n<tr><td>ECMAScript 3<\/td><td>ES3<\/td><td>1999\u5e74<\/td><td>\u2605\u2605\u2605\uff08\u6b63\u898f\u8868\u73fe\u30fbtry-catch\u306a\u3069\u5927\u5e45\u8ffd\u52a0\uff09<\/td><\/tr>\n<tr><td>ECMAScript 4<\/td><td>ES4<\/td><td>\u672a\u516c\u958b<\/td><td>\u2605\u2605\u2605\uff08\u5927\u898f\u6a21\u5909\u66f4\u3067\u8b70\u8ad6\u7d1b\u7cfe\u2192\u5ec3\u6848\uff09<\/td><\/tr>\n<tr><td>ECMAScript 5<\/td><td>ES5<\/td><td>2009\u5e74<\/td><td>\u2605\u2605\u2605\uff08strict mode\u30fbJSON\u30fbArray\u65b0\u30e1\u30bd\u30c3\u30c9\uff09<\/td><\/tr>\n<tr><td>ECMAScript 5.1<\/td><td>ES5.1<\/td><td>2011\u5e74<\/td><td>\u2605\uff08ISO\u6a19\u6e96\u5316\u5bfe\u5fdc\uff09<\/td><\/tr>\n<tr><td>ECMAScript 6<\/td><td>ES6 \/ ES2015<\/td><td>2015\u5e74<\/td><td>\u2605\u2605\u2605\u2605\u2605\uff08let\/const\u30fbclass\u30fbarrow\u95a2\u6570\u30fbPromise\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2016<\/td><td>ES7<\/td><td>2016\u5e74<\/td><td>\u2605\u2605\uff08Array.includes\u30fb\u3079\u304d\u4e57\u6f14\u7b97\u5b50\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2017<\/td><td>ES8<\/td><td>2017\u5e74<\/td><td>\u2605\u2605\u2605\u2605\uff08async\/await\u30fbObject.values\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2018<\/td><td>ES9<\/td><td>2018\u5e74<\/td><td>\u2605\u2605\u2605\uff08Rest\/Spread\u30fb\u975e\u540c\u671f\u53cd\u5fa9\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2019<\/td><td>ES10<\/td><td>2019\u5e74<\/td><td>\u2605\u2605\uff08Array.flat\u30fbObject.fromEntries\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2020<\/td><td>ES11<\/td><td>2020\u5e74<\/td><td>\u2605\u2605\u2605\uff08Optional Chaining\u30fbNullish Coalescing\u30fbBigInt\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2021<\/td><td>ES12<\/td><td>2021\u5e74<\/td><td>\u2605\u2605\uff08String.replaceAll\u30fbPromise.any\u30fb&&=\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2022<\/td><td>ES13<\/td><td>2022\u5e74<\/td><td>\u2605\u2605\u2605\uff08Top-Level Await\u30fbat()\u30fbError.cause\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2023<\/td><td>ES14<\/td><td>2023\u5e74<\/td><td>\u2605\u2605\uff08Array.findLast\u30fb\u65b0Hashbang\u30eb\u30fc\u30eb\uff09<\/td><\/tr>\n<tr><td>ECMAScript 2024<\/td><td>ES15<\/td><td>2024\u5e74<\/td><td>\u2605\u2605\uff08Promise.withResolvers\u30fbObject.groupBy\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u300c\u306a\u305cES4\u306f\u5ec3\u6848\u306b\u306a\u3063\u305f\u306e\u304b\u300d\u3068\u3044\u3046\u8208\u5473\u6df1\u3044\u6b74\u53f2<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">ES4\u306f\u30af\u30e9\u30b9\u30fb\u540d\u524d\u7a7a\u9593\u30fb\u578b\u4ed8\u3051\u7b49\u306e\u5927\u898f\u6a21\u306a\u5909\u66f4\u3092\u63d0\u6848\u3057\u307e\u3057\u305f\u304c\u3001Microsoft\u3068Yahoo\u304c\u5f37\u304f\u53cd\u5bfe\u3057\u3001TC39\u5185\u3067\u5408\u610f\u304c\u5f62\u6210\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u305d\u306e\u5f8cES4\u306e\u4e00\u90e8\u30a2\u30a4\u30c7\u30a2\u306fES6\uff08ES2015\uff09\u306b\u5f15\u304d\u7d99\u304c\u308c\u3001ActionScript\uff08Adobe Flash\uff09\u306b\u5b9f\u88c5\u3055\u308c\u307e\u3057\u305f\u304c\u3001Flash\u81ea\u4f53\u304c\u5ec3\u6b62\u3055\u308c\u305f\u305f\u3081\u6b74\u53f2\u7684\u306a\u907a\u7269\u3068\u306a\u308a\u307e\u3057\u305f\u3002ES4\u306e\u5931\u6557\u306f\u300c\u5f8c\u65b9\u4e92\u63db\u6027\u306e\u7dad\u6301\u300d\u306e\u91cd\u8981\u6027\u3092JavaScript\u958b\u767a\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306b\u5f37\u304f\u610f\u8b58\u3055\u305b\u308b\u304d\u3063\u304b\u3051\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u5f8c\u65b9\u4e92\u63db\u6027\uff08Backward Compatibility\uff09<\/strong>\uff1a\u53e4\u3044\u30b3\u30fc\u30c9\u304c\u65b0\u3057\u3044\u74b0\u5883\u3067\u3082\u52d5\u304d\u7d9a\u3051\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u539f\u5247\u3002JavaScript\u306f\u300c\u58ca\u308c\u305fWeb\u3092\u76f4\u3059\u300d\u3092\u6700\u512a\u5148\u54f2\u5b66\u3068\u3057\u3066\u3001\u65e2\u5b58\u306eWeb\u30b5\u30a4\u30c8\u3092\u58ca\u3059\u3088\u3046\u306a\u4ed5\u69d8\u5909\u66f4\u3092\u907f\u3051\u3066\u304d\u305f\u3002\u3053\u308c\u306fPython\u306ePython2\u2192Python3\u79fb\u884c\uff08\u5f8c\u65b9\u4e92\u63db\u6027\u306a\u3057\uff09\u3068\u306f\u5bfe\u7167\u7684\u3067\u3001JavaScript\u304c\u300c10\u5e74\u524d\u306e\u30b3\u30fc\u30c9\u304c\u4eca\u3082\u52d5\u304f\u300d\u3068\u3044\u3046\u7a00\u306a\u6027\u8cea\u3092\u6301\u3064\u7406\u7531\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-04\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">04<\/span>\n  <span class=\"section-label\" style=\"display:block;\">TC39 PROCESS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">TC39\u3068\u306f\uff1fECMAScript\u4ed5\u69d8\u306e\u7b56\u5b9a\u30d7\u30ed\u30bb\u30b95\u30b9\u30c6\u30fc\u30b8<\/span>\n  <span class=\"section-desc\">Proposal \u2192 Stage 0\u301c4 \u306e\u9053\u306e\u308a\u3068\u3001\u65b0\u6a5f\u80fd\u304c\u3069\u3046JavaScript\u306b\u8ffd\u52a0\u3055\u308c\u308b\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ECMAScript\u306b\u65b0\u3057\u3044\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u308b\u307e\u3067\u306b\u306f\u3001TC39\u304c\u5b9a\u3081\u305f5\u6bb5\u968e\u306e\u5be9\u67fb\u30d7\u30ed\u30bb\u30b9\uff08\u30b9\u30c6\u30fc\u30b8\u5236\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u7406\u89e3\u3059\u308b\u3068\u300c\u3053\u306e\u6a5f\u80fd\u306f\u307e\u3060\u4f7f\u3048\u306a\u3044\u300d\u300c\u3053\u308c\u306f\u5168\u30d6\u30e9\u30a6\u30b6\u3067\u4f7f\u3048\u308b\u300d\u304c\u5224\u65ad\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30b9\u30c6\u30fc\u30b8<\/th><th>\u540d\u79f0<\/th><th>\u5185\u5bb9<\/th><th>\u76ee\u5b89\u671f\u9593<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Stage 0<\/td><td>Strawperson\uff08\u6848\uff09<\/td><td>TC39\u30e1\u30f3\u30d0\u30fc\u304c\u300c\u3053\u3093\u306a\u6a5f\u80fd\u304c\u6b32\u3057\u3044\u300d\u3068\u63d0\u6848\u3057\u305f\u6bb5\u968e\u3002\u6b63\u5f0f\u306a\u63a1\u7528\u304c\u6c7a\u307e\u3063\u305f\u308f\u3051\u3067\u306f\u306a\u3044<\/td><td>\u301c\u6570\u9031\u9593<\/td><\/tr>\n<tr><td>Stage 1<\/td><td>Proposal\uff08\u63d0\u6848\uff09<\/td><td>TC39\u304c\u300c\u691c\u8a0e\u3059\u308b\u4fa1\u5024\u304c\u3042\u308b\u300d\u3068\u8a8d\u3081\u305f\u6bb5\u968e\u3002API\u306e\u5f62\u3084\u89e3\u6c7a\u3059\u308b\u554f\u984c\u3092\u660e\u78ba\u5316<\/td><td>\u301c\u6570\u30f6\u6708<\/td><\/tr>\n<tr><td>Stage 2<\/td><td>Draft\uff08\u8349\u6848\uff09<\/td><td>\u521d\u671f\u306e\u4ed5\u69d8\u6848\u3092\u6587\u66f8\u5316\u3002\u5b9f\u9a13\u7684\u5b9f\u88c5\u3092\u8a31\u53ef\u3002\u57fa\u672c\u7684\u306a\u69cb\u6587\u30fb\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u78ba\u5b9a<\/td><td>\u301c1\u5e74<\/td><\/tr>\n<tr><td>Stage 2.7<\/td><td>Approved\uff08\u627f\u8a8d\u8349\u6848\uff09<\/td><td>2023\u5e74\u8ffd\u52a0\u3002\u4ed5\u69d8\u304c\u5b89\u5b9a\u3057\u3001\u3042\u3068\u306f\u8a00\u8a9e\u3078\u306e\u7d71\u5408\u3092\u5f85\u3064\u6bb5\u968e<\/td><td>\u301c\u6570\u30f6\u6708<\/td><\/tr>\n<tr><td>Stage 3<\/td><td>Candidate\uff08\u5019\u88dc\uff09<\/td><td>\u4ed5\u69d8\u307b\u307c\u78ba\u5b9a\u3002\u30d6\u30e9\u30a6\u30b6\u30d9\u30f3\u30c0\u30fc\u304c\u5b9f\u88c5\u3092\u958b\u59cb\u3002\u958b\u767a\u8005\u304c\u30d5\u30e9\u30b0\u4ed8\u304d\u3067\u8a66\u9a13\u5229\u7528\u53ef\u80fd<\/td><td>\u301c1\u5e74<\/td><\/tr>\n<tr><td>Stage 4<\/td><td>Finished\uff08\u5b8c\u4e86\uff09<\/td><td>2\u3064\u4ee5\u4e0a\u306e\u5b9f\u88c5\u304c\u5b8c\u4e86\u3057\u3001\u30c6\u30b9\u30c8\u5408\u683c\u3002\u6b21\u306eECMAScript\u306b\u6b63\u5f0f\u8ffd\u52a0<\/td><td>\u7fcc\u5e746\u6708\u516c\u958b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>Stage 0<\/strong><br><span style=\"font-size:12px;\">\u30a2\u30a4\u30c7\u30a2\u63d0\u6848<br>TC39\u30e1\u30f3\u30d0\u30fc<br>\u306e\u307f\u53ef\u80fd<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Stage 1<\/strong><br><span style=\"font-size:12px;\">\u554f\u984c\u5b9a\u7fa9<br>API\u6848\u4f5c\u6210<br>\u59d4\u54e1\u4f1a\u627f\u8a8d<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Stage 2<\/strong><br><span style=\"font-size:12px;\">\u8349\u6848\u6587\u66f8\u5316<br>\u69cb\u6587\u306e<br>\u57fa\u672c\u78ba\u5b9a<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Stage 3<\/strong><br><span style=\"font-size:12px;\">\u4ed5\u69d8\u78ba\u5b9a<br>\u30d6\u30e9\u30a6\u30b6\u5b9f\u88c5<br>\u958b\u59cb<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Stage 4<\/strong><br><span style=\"font-size:12px;\">\u8907\u6570\u5b9f\u88c5<br>\u5b8c\u4e86\u2192\u7fcc\u5e74<br>\u6b63\u5f0f\u53ce\u9332<\/span><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Web\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u6ce8\u76ee\u3059\u308b\u306e\u306f\u4e3b\u306b<strong>Stage 3\u3068Stage 4<\/strong>\u3067\u3059\u3002Stage 3\u306b\u5165\u3063\u305f\u3089\u300c\u8fd1\u3044\u5c06\u6765\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u6a5f\u80fd\u300d\u3068\u3057\u3066\u5b66\u7fd2\u5bfe\u8c61\u306b\u306a\u308a\u3001Stage 4\u3067\u300c\u6b21\u306eECMAScript\u306b\u5165\u308b\u3053\u3068\u304c\u78ba\u5b9a\u3057\u305f\u6a5f\u80fd\u300d\u3068\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">TC39\u306eProposal\u306fGitHub\u3067\u8ab0\u3067\u3082\u78ba\u8a8d\u3067\u304d\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">TC39\u306e\u5168Proposal\u306f github.com\/tc39\/proposals \u3067\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u73fe\u5728Stage 3\u306e\u6a5f\u80fd\uff08\u8fd1\u3044\u5c06\u6765\u8ffd\u52a0\u3055\u308c\u308b\u6a5f\u80fd\uff09\u306fStage 3 Proposals\u306e\u30ea\u30b9\u30c8\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002JavaScript\u306e\u6700\u5148\u7aef\u52d5\u5411\u3092\u8ffd\u3046\u306e\u306b\u6700\u3082\u4e00\u6b21\u60c5\u5831\u306b\u8fd1\u3044\u5834\u6240\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-05\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">05<\/span>\n  <span class=\"section-label\" style=\"display:block;\">KEY FEATURES<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u4e3b\u8981\u30d0\u30fc\u30b8\u30e7\u30f3\u5225\u306e\u65b0\u6a5f\u80fd\u307e\u3068\u3081\uff1aES2015\u301cES2024\u65e9\u898b\u8868<\/span>\n  <span class=\"section-desc\">\u73fe\u4ee3\u306eJavaScript\u958b\u767a\u3067\u4f7f\u308f\u308c\u308b\u6a5f\u80fd\u306e9\u5272\u306fES2015\u301cES2020\u3067\u767b\u5834\u3057\u305f<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u5728\u306e\u30e2\u30c0\u30f3\u306aJavaScript\u958b\u767a\u3067\u4f7f\u308f\u308c\u308b\u91cd\u8981\u306a\u6a5f\u80fd\u306e\u307b\u3068\u3093\u3069\u306f\u3001ES2015\uff08ES6\uff09\u4ee5\u964d\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304f\u3079\u304d\u6a5f\u80fd\u3092\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u5225\u306b\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5-1. ES2015\uff08ES6\uff09\uff1aJavaScript\u306e\u5927\u9769\u547d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ES2015\u306f\u300cJavaScript\u306e\u5927\u9769\u547d\u300d\u3068\u547c\u3070\u308c\u308b\u307b\u3069\u5927\u91cf\u306e\u65b0\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002\u73fe\u4ee3\u306eJavaScript\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9\u304c\u5927\u304d\u304f\u5909\u308f\u3063\u305f\u8ee2\u63db\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>let\u30fbconst<\/strong>\u2014\u2014\u5f93\u6765\u306evar\u306b\u4ee3\u308f\u308b\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u5ba3\u8a00\u3002var\u306e\u4e88\u671f\u3057\u306a\u3044\u6319\u52d5\uff08\u30db\u30a4\u30b9\u30c6\u30a3\u30f3\u30b0\u7b49\uff09\u3092\u56de\u907f<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30a2\u30ed\u30fc\u95a2\u6570\uff08Arrow Function\uff09<\/strong>\u2014\u2014<code>function() {}<\/code>\u306e\u4ee3\u308f\u308a\u306b<code>() =&gt; {}<\/code>\u3068\u66f8\u3051\u308b\u3002this\u306e\u6319\u52d5\u304c\u5909\u308f\u308b\u91cd\u8981\u306a\u9055\u3044\u3042\u308a<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>class\u69cb\u6587<\/strong>\u2014\u2014\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u30d9\u30fc\u30b9\u306eOOP\u3092class\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u76f4\u611f\u7684\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u305f\uff08\u5185\u90e8\u5b9f\u88c5\u306f\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u306e\u307e\u307e\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30ea\u30c6\u30e9\u30eb<\/strong>\u2014\u2014\u30d0\u30c3\u30af\u30af\u30a9\u30fc\u30c8\u3067\u56f2\u3093\u3067<code>`Hello, ${name}!`<\/code>\u306e\u3088\u3046\u306b\u5909\u6570\u3092\u57cb\u3081\u8fbc\u3081\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u5206\u5272\u4ee3\u5165\uff08Destructuring\uff09<\/strong>\u2014\u2014<code>const {x, y} = point<\/code>\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u304b\u3089\u4e00\u62ec\u62bd\u51fa<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08...\uff09<\/strong>\u2014\u2014\u914d\u5217\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5c55\u958b\u30fb\u30b3\u30d4\u30fc\u30fb\u7d50\u5408\u3059\u308b\u305f\u3081\u306e<code>...<\/code>\u6f14\u7b97\u5b50<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Promise<\/strong>\u2014\u2014\u975e\u540c\u671f\u51e6\u7406\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u5730\u7344\u304b\u3089\u89e3\u653e\u3002then\/catch\/finally\u3067\u51e6\u7406\u3092\u9023\u9396<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e2\u30b8\u30e5\u30fc\u30eb\uff08import\/export\uff09<\/strong>\u2014\u2014\u30d5\u30a1\u30a4\u30eb\u9593\u3067\u30b3\u30fc\u30c9\u3092\u5206\u5272\u30fb\u5171\u6709\u3059\u308b\u305f\u3081\u306e\u516c\u5f0f\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Symbol\u578b<\/strong>\u2014\u2014\u30e6\u30cb\u30fc\u30af\u306a\u8b58\u5225\u5b50\u3092\u4f5c\u308b\u305f\u3081\u306e\u65b0\u3057\u3044\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Map\u30fbSet<\/strong>\u2014\u2014\u30ad\u30fc\u306b\u4efb\u610f\u306e\u5024\u3092\u4f7f\u3048\u308bMap\u3001\u91cd\u8907\u3092\u6392\u9664\u3059\u308bSet\u3068\u3044\u3046\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/span><\/div>\n\n<\/div>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ ES5\u306e\u66f8\u304d\u65b9\uff08\u53e4\u3044\uff09\nvar name = 'Alice';\nfunction greet(name) {\n  return 'Hello, ' + name + '!';\n}\nvar promise = new Promise(function(resolve, reject) {\n  setTimeout(function() { resolve('done'); }, 1000);\n});\n\n\/\/ ES2015\u306e\u66f8\u304d\u65b9\uff08\u30e2\u30c0\u30f3\uff09\nconst name = 'Alice';\nconst greet = (name) =&gt; `Hello, ${name}!`;\nconst promise = new Promise((resolve, reject) =&gt; {\n  setTimeout(() =&gt; resolve('done'), 1000);\n});<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-2. ES2017\uff1aasync\/await\u306e\u8ffd\u52a0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ES2017\u3067\u8ffd\u52a0\u3055\u308c\u305f<strong>async\/await<\/strong>\u306f\u3001\u975e\u540c\u671f\u51e6\u7406\u306e\u66f8\u304d\u65b9\u3092\u5287\u7684\u306b\u7c21\u5358\u306b\u3057\u307e\u3057\u305f\u3002Promise\u306ethen\/catch\u3092\u9023\u9396\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u540c\u671f\u51e6\u7406\u306e\u3088\u3046\u306b\u8aad\u3081\u308b\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ Promise\u306ethen\/catch\uff08ES2015\u301c\uff09\nfetch('\/api\/data')\n  .then(res =&gt; res.json())\n  .then(data =&gt; console.log(data))\n  .catch(err =&gt; console.error(err));\n\n\/\/ async\/await\uff08ES2017\u301c\uff09\u2014 \u5727\u5012\u7684\u306b\u8aad\u307f\u3084\u3059\u3044\nasync function getData() {\n  try {\n    const res = await fetch('\/api\/data');\n    const data = await res.json();\n    console.log(data);\n  } catch (err) {\n    console.error(err);\n  }\n}<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-3. ES2020\u301c\uff1aOptional Chaining\u30fbNullish Coalescing\u30fbBigInt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ES2020\u4ee5\u964d\u306b\u8ffd\u52a0\u3055\u308c\u305f\u6a5f\u80fd\u3067\u7279\u306b\u5b9f\u7528\u7684\u306a\u306e\u304c\u300cOptional Chaining\uff08?.\uff09\u300d\u3068\u300cNullish Coalescing\uff08??\uff09\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ Optional Chaining\uff08?.\uff09\u2014 ES2020\n\/\/ null\u3084undefined\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3067\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\nconst city = user?.address?.city; \/\/ user\u3084address\u304cnull\u3067\u3082\u30a8\u30e9\u30fc\u306a\u3057\n\n\/\/ \u65e7\u6765\u306e\u66f8\u304d\u65b9\nconst city = user &amp;&amp; user.address &amp;&amp; user.address.city;\n\n\/\/ Nullish Coalescing\uff08??\uff09\u2014 ES2020\n\/\/ null\u307e\u305f\u306fundefined\u306e\u5834\u5408\u306e\u307f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\nconst name = user.name ?? '\u540d\u524d\u672a\u8a2d\u5b9a';\n\n\/\/ || \u3068\u306e\u9055\u3044: || \u306f 0 \u3084\u7a7a\u6587\u5b57\u5217\u3082falsy\u6271\u3044\nconst count = value || 0;  \/\/ value\u304c0\u3067\u30820\u304c\u8fd4\u308b\uff08\u610f\u56f3\u3057\u306a\u3044\u5834\u5408\u3042\u308a\uff09\nconst count2 = value ?? 0; \/\/ value\u304cnull\/undefined\u306e\u6642\u3060\u30510\u304c\u8fd4\u308b<\/code><\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>Optional Chaining\uff08?. \uff09<\/strong>\uff1aES2020\u3067\u8ffd\u52a0\u3055\u308c\u305f\u6f14\u7b97\u5b50\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001\u9014\u4e2d\u3067null\u307e\u305f\u306fundefined\u304c\u73fe\u308c\u3066\u3082\u30a8\u30e9\u30fc\u3092\u6295\u3052\u305a\u306bundefined\u3092\u8fd4\u3059\u3002<code>user?.address?.city<\/code>\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u304c\u6df1\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-4. ES2022\u301c\uff1aTop-Level Await\u3068\u30af\u30e9\u30b9\u6a5f\u80fd\u5f37\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ES2022\u3067\u306f<strong>Top-Level Await<\/strong>\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\uff08\u95a2\u6570\u306e\u5916\uff09\u3067\u76f4\u63a5await\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u3084\u521d\u671f\u5316\u51e6\u7406\u3092\u540c\u671f\u7684\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ ES2022 Top-Level Await \u2014 \u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u3067\u76f4\u63a5await\nconst config = await fetch('\/config.json').then(r =&gt; r.json());\n\n\/\/ ES2022 \u30af\u30e9\u30b9\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\uff08#prefix\uff09\nclass Counter {\n  #count = 0; \/\/ \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u30af\u30e9\u30b9\u5916\u304b\u3089\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\uff09\n\n  increment() { this.#count++; }\n  get value() { return this.#count; }\n}\n\n\/\/ ES2024 Object.groupBy \u2014 \u914d\u5217\u3092\u30ad\u30fc\u3067\u30b0\u30eb\u30fc\u30d7\u5316\nconst result = Object.groupBy(products, product =&gt; product.category);\n\/\/ { 'electronics': [...], 'clothing': [...] }<\/code><\/pre>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-06\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">06<\/span>\n  <span class=\"section-label\" style=\"display:block;\">TRANSPILE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u3068\u306f\uff1fBabel\u3068TypeScript\u306e\u5f79\u5272<\/span>\n  <span class=\"section-desc\">\u65b0\u3057\u3044ECMAScript\u3092\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u304b\u3059\u305f\u3081\u306e\u5909\u63db\u6280\u8853<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ES2015\u4ee5\u964d\u306e\u65b0\u3057\u3044\u69cb\u6587\u306f\u3001\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\uff08IE 11\u7b49\uff09\u3067\u306f\u52d5\u304d\u307e\u305b\u3093\u3002<strong>\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb<\/strong>\u3068\u306f\u3001\u6700\u65b0\u306eJavaScript\u30b3\u30fc\u30c9\u3092\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u3082\u52d5\u304f\u5f62\u5f0f\u306b\u81ea\u52d5\u5909\u63db\u3059\u308b\u51e6\u7406\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\uff08Transpile\uff09<\/strong>\uff1a\u540c\u3058\u62bd\u8c61\u30ec\u30d9\u30eb\u306e\u5225\u306e\u8a00\u8a9e\u30fb\u69cb\u6587\u306b\u5909\u63db\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3002TypeScript\u2192JavaScript\u3078\u306e\u5909\u63db\u3084\u3001ES2015\u69cb\u6587\u2192ES5\u69cb\u6587\u3078\u306e\u5909\u63db\u304c\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u306e\u4ee3\u8868\u4f8b\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u300c\u9ad8\u30ec\u30d9\u30eb\u8a00\u8a9e\u2192\u6a5f\u68b0\u8a9e\u300d\u3078\u306e\u5909\u63db\u3092\u6307\u3059\u306e\u306b\u5bfe\u3057\u3001\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u306f\u300c\u9ad8\u30ec\u30d9\u30eb\u8a00\u8a9e\u2192\u5225\u306e\u9ad8\u30ec\u30d9\u30eb\u8a00\u8a9e\u300d\u3078\u306e\u5909\u63db\u3092\u6307\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. Babel\uff1aJavaScript\u3092JavaScript\u306b\u5909\u63db\u3059\u308b\u30c4\u30fc\u30eb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Babel<\/strong>\u306f\u300c\u6700\u65b0\u306eECMAScript\u69cb\u6587\u3067\u66f8\u3044\u305fJavaScript\u3092\u3001\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u304c\u7406\u89e3\u3067\u304d\u308bES5\u76f8\u5f53\u306eJavaScript\u306b\u5909\u63db\u3059\u308b\u300d\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4f8b\u3048\u3070ES2015\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001Babel\u3092\u901a\u3059\u3068\u5f93\u6765\u306efunction\u5f0f\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code># Babel\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\nnpm install --save-dev @babel\/core @babel\/cli @babel\/preset-env\n\n# babel.config.json \u306e\u8a2d\u5b9a\n{\n  \"presets\": [\n    [\"@babel\/preset-env\", {\n      \"targets\": \"&gt; 0.25%, not dead\",  \/\/ \u5bfe\u8c61\u30d6\u30e9\u30a6\u30b6\u3092\u6307\u5b9a\n      \"useBuiltIns\": \"usage\",\n      \"corejs\": 3\n    }]\n  ]\n}\n\n# \u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u5b9f\u884c\nnpx babel src --out-dir dist<\/code><\/pre>\n<\/div>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ \u5909\u63db\u524d\uff08ES2015\u306e\u30a2\u30ed\u30fc\u95a2\u6570\uff09\nconst add = (a, b) =&gt; a + b;\n\n\/\/ Babel\u304c\u5909\u63db\u5f8c\uff08ES5\u306efunction\u5f0f\uff09\nvar add = function add(a, b) {\n  return a + b;\n};<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-2. TypeScript\uff1a\u578b\u4ed8\u304dJavaScript\u306e\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TypeScript<\/strong>\u306fMicrosoft\u304c\u958b\u767a\u3057\u305f\u300cJavaScript\u306b\u578b\u30c1\u30a7\u30c3\u30af\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u305f\u8a00\u8a9e\u300d\u3067\u3059\u3002.ts\u3068\u3044\u3046\u62e1\u5f35\u5b50\u3067\u66f8\u304b\u308c\u305fTypeScript\u30b3\u30fc\u30c9\u306f\u3001TypeScript\u30b3\u30f3\u30d1\u30a4\u30e9\uff08tsc\uff09\u3067JavaScript\u306b\u5909\u63db\uff08\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\uff09\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ TypeScript\uff08\u578b\u4ed8\u304d\uff09\nfunction greet(name: string, age: number): string {\n  return `${name}\u3055\u3093\uff08${age}\u6b73\uff09\u3001\u3053\u3093\u306b\u3061\u306f\uff01`;\n}\n\n\/\/ \u8aa4\u3063\u305f\u578b\u3092\u6e21\u3059\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30a8\u30e9\u30fc\ngreet('Alice', 'thirty');  \/\/ \u30a8\u30e9\u30fc: 'string'\u3092'number'\u578b\u306b\u4ee3\u5165\u3067\u304d\u307e\u305b\u3093\n\n\/\/ TypeScript\u2192JavaScript\u306b\u5909\u63db\u5f8c\nfunction greet(name, age) {\n  return `${name}\u3055\u3093\uff08${age}\u6b73\uff09\u3001\u3053\u3093\u306b\u3061\u306f\uff01`;\n}<\/code><\/pre>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u9805\u76ee<\/th><th>Babel<\/th><th>TypeScript<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u5f79\u5272<\/td><td>\u6700\u65b0\u69cb\u6587\u2192\u53e4\u3044JS\u5909\u63db<\/td><td>\u578b\u4ed8\u304dJS\u2192JS\u5909\u63db\uff08\u578b\u30c1\u30a7\u30c3\u30af\uff09<\/td><\/tr>\n<tr><td>\u578b\u30c1\u30a7\u30c3\u30af<\/td><td>\u306a\u3057<\/td><td>\u3042\u308a\uff08TypeScript\u306e\u4e3b\u76ee\u7684\uff09<\/td><\/tr>\n<tr><td>\u51fa\u529b<\/td><td>JavaScript\u306e\u307f<\/td><td>JavaScript\uff08\u578b\u60c5\u5831\u306f\u524a\u9664\uff09<\/td><\/tr>\n<tr><td>\u5b66\u7fd2\u30b3\u30b9\u30c8<\/td><td>\u4f4e\uff08\u8a2d\u5b9a\u3060\u3051\uff09<\/td><td>\u4e2d\u301c\u9ad8\uff08\u578b\u306e\u77e5\u8b58\u304c\u5fc5\u8981\uff09<\/td><\/tr>\n<tr><td>\u5411\u3044\u3066\u3044\u308b\u7528\u9014<\/td><td>\u30d6\u30e9\u30a6\u30b6\u4e92\u63db\u6027\u306e\u78ba\u4fdd<\/td><td>\u5927\u898f\u6a21\u958b\u767a\u30fb\u30c1\u30fc\u30e0\u958b\u767a\u30fb\u30d0\u30b0\u306e\u4e8b\u524d\u9632\u6b62<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-js-ecmascript&#038;blog_slug=cc-js-ecmascript\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-js-ecmascript&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-07\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">07<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CLAUDE CODE PRACTICE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u3011Claude Code\u3067\u30e2\u30c0\u30f3JavaScript\u958b\u767a\u309210\u500d\u52a0\u901f\u3059\u308b<\/span>\n  <span class=\"section-desc\">\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u300c\u66f8\u3051\u308bJS\u300d\u3092\u5897\u3084\u3059\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u3001Claude Code\u3092\u4f7f\u3063\u3066JavaScript\u958b\u767a\u3092\u52a0\u901f\u3055\u305b\u308b\u5b9f\u8df5\u7684\u306a\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u300cJavaScript\u3092\u5b66\u3073\u305f\u3044\u304c\u3001\u72ec\u5b66\u306f\u96e3\u3057\u3044\u300d\u300cECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u5dee\u7570\u3067\u8a70\u307e\u308b\u300d\u3068\u3044\u3046\u65b9\u306b\u7279\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. \u300c\u3053\u306e\u66f8\u304d\u65b9\u306fES\u4f55\uff1f\u300d\u3092\u5373\u5ea7\u306b\u5224\u5b9a\u3057\u3066\u3082\u3089\u3046<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u300c\u3053\u308c\u306f\u4f7f\u3063\u3066\u5927\u4e08\u592b\u306a\u66f8\u304d\u65b9\u304b\u300d\u300c\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u3082\u52d5\u304f\u304b\u300d\u3092\u5224\u65ad\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u3002Claude Code\u306a\u3089\u3001\u30b3\u30fc\u30c9\u3092\u8cbc\u308b\u3060\u3051\u3067\u5373\u5ea7\u306b\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u3053\u306e\u30b3\u30fc\u30c9\u306fECMAScript\u4f55\u5e74\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u304b\uff1fIE11\u3067\u52d5\u304d\u307e\u3059\u304b\uff1f\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u3053\u306eES2020\u306e\u66f8\u304d\u65b9\u3092ES5\u3067\u52d5\u304f\u5f62\u306b\u66f8\u304d\u76f4\u3057\u3066\u304f\u3060\u3055\u3044\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u73fe\u5728\u306e\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u306a\u3089\u3053\u306e\u30b3\u30fc\u30c9\u306e\u3069\u306e\u90e8\u5206\u3092ES2015\u4ee5\u964d\u306e\u66f8\u304d\u65b9\u306b\u76f4\u305b\u307e\u3059\u304b\uff1f\u300d<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u300c\u3053\u306eBabel\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306f\u4f55\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u304b\uff1f\u65e5\u672c\u8a9e\u3067\u8aac\u660e\u3057\u3066\u304f\u3060\u3055\u3044\u300d<\/span><\/div>\n\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-2. \u65e7\u6765\u30b3\u30fc\u30c9\u2192\u30e2\u30c0\u30f3JS\u3078\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092Claude Code\u306b\u4f9d\u983c\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e2\u5b58\u306e\u53e4\u3044JavaScript\u30b3\u30fc\u30c9\u3092ES2015\u4ee5\u964d\u306e\u30e2\u30c0\u30f3\u306a\u66f8\u304d\u65b9\u306b\u66f4\u65b0\u3059\u308b\u4f5c\u696d\u306f\u3001Claude Code\u306b\u4e38\u6295\u3052\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ Claude Code\u3078\u306e\u6307\u793a\u4f8b:\n\/\/ \u300c\u4ee5\u4e0b\u306eES5\u30b3\u30fc\u30c9\u3092ES2015\u4ee5\u964d\u306e\u30e2\u30c0\u30f3\u306a\u66f8\u304d\u65b9\u306b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n\/\/  \u5909\u63db\u306e\u30dd\u30a4\u30f3\u30c8\u3082\u65e5\u672c\u8a9e\u3067\u30b3\u30e1\u30f3\u30c8\u3057\u3066\u304f\u3060\u3055\u3044\u300d\n\n\/\/ \u5909\u63db\u524d\uff08\u53e4\u3044ES5\u30b3\u30fc\u30c9\uff09\nvar users = [];\nfor (var i = 0; i &lt; data.length; i++) {\n  if (data[i].active) {\n    users.push({\n      name: data[i].name,\n      email: data[i].email\n    });\n  }\n}\n\n\/\/ Claude Code\u304c\u63d0\u6848\u3059\u308b\u5909\u63db\u5f8c\uff08\u30e2\u30c0\u30f3\u306aES2015+\u30b3\u30fc\u30c9\uff09\nconst users = data\n  .filter(user =&gt; user.active)           \/\/ filter\u3067active\u306a\u30e6\u30fc\u30b6\u30fc\u3060\u3051\u62bd\u51fa\n  .map(({ name, email }) =&gt; ({ name, email })); \/\/ \u5206\u5272\u4ee3\u5165\u3067\u30b7\u30f3\u30d7\u30eb\u306b\u5909\u63db<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-3. TypeScript\u578b\u5b9a\u7fa9\u3092Claude Code\u306b\u81ea\u52d5\u751f\u6210\u3057\u3066\u3082\u3089\u3046<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">TypeScript\u306e\u578b\u5b9a\u7fa9\uff08interface\u30fbtype\uff09\u3092\u66f8\u304f\u306e\u306f\u3081\u3093\u3069\u3046\u3067\u3059\u304c\u3001Claude Code\u306b\u65e2\u5b58\u306eJavaScript\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u305b\u3070\u81ea\u52d5\u751f\u6210\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e2e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n<pre style=\"margin:0;color:#cdd6f4;font-family:'Fira Code',monospace;font-size:14px;line-height:1.7;white-space:pre-wrap;\"><code>\/\/ Claude Code\u3078\u306e\u6307\u793a:\n\/\/ \u300c\u4ee5\u4e0b\u306eJavaScript\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092TypeScript\u306einterface\u306b\u5909\u63db\u3057\u3066\u304f\u3060\u3055\u3044\u300d\n\nconst user = {\n  id: 1,\n  name: '\u5c71\u5d0e',\n  email: 'yamazaki@example.com',\n  role: 'admin',\n  createdAt: '2025-01-01T00:00:00Z',\n  profile: {\n    age: 30,\n    department: '\u55b6\u696d\u90e8',\n    tags: ['manager', 'sales']\n  }\n};\n\n\/\/ Claude Code\u304c\u51fa\u529b\u3059\u308bTypeScript\u578b\u5b9a\u7fa9\ninterface UserProfile {\n  age: number;\n  department: string;\n  tags: string[];\n}\n\ninterface User {\n  id: number;\n  name: string;\n  email: string;\n  role: 'admin' | 'user' | 'viewer';  \/\/ Union\u578b\u3067\u5024\u3092\u5236\u9650\n  createdAt: string; \/\/ ISO 8601\u5f62\u5f0f\n  profile: UserProfile;\n}<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-4. \u696d\u52d9\u30b9\u30af\u30ea\u30d7\u30c8\u3092Claude Code\u3067\u66f8\u3044\u3066\u3082\u3089\u3046\u5b9f\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\u3067Claude Code\u3092\u4f7f\u3063\u3066\u5b9f\u969b\u306b\u66f8\u3044\u3066\u3044\u308bJavaScript\u696d\u52d9\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Spreadsheet\u306e\u30c7\u30fc\u30bf\u3092API\u3067\u81ea\u52d5\u6574\u5f62<\/strong>\uff1aGoogle Apps Script\u3067\u52d5\u304f\u3001\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u2192JSON\u5909\u63db\u30b9\u30af\u30ea\u30d7\u30c8<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Web\u30b9\u30af\u30ec\u30a4\u30d4\u30f3\u30b0\u306e\u7d50\u679c\u3092\u6574\u5f62<\/strong>\uff1aPuppeteer\uff08Node.js\uff09\u3092\u4f7f\u3063\u305f\u8907\u6570\u30b5\u30a4\u30c8\u306e\u4fa1\u683c\u30c7\u30fc\u30bf\u4e00\u62ec\u53d6\u5f97<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>WordPress\u306e\u6295\u7a3f\u3092\u4e00\u62ec\u66f4\u65b0<\/strong>\uff1aWP REST API\u3092fetch+async\/await\u3067\u547c\u3073\u51fa\u3059\u6295\u7a3f\u66f4\u65b0\u30b9\u30af\u30ea\u30d7\u30c8<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Slack\u3078\u306e\u81ea\u52d5\u901a\u77e5<\/strong>\uff1aNode.js\u3067Slack Webhook\u306bJSON POST\u3057\u3066\u696d\u52d9\u901a\u77e5\u3092\u81ea\u52d5\u5316<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30d0\u30c3\u30c1\u51e6\u7406\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u89e3\u6790<\/strong>\uff1aNode.js\u3067\u5927\u91cf\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u975e\u540c\u671f\u3067\u4e26\u5217\u8aad\u307f\u8fbc\u307f\u30fb\u96c6\u8a08<\/span><\/div>\n\n<\/div>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a,#2a1015);border-radius:12px;padding:20px 24px;margin:24px 0;display:flex;align-items:center;gap:16px;color:#fff;\">\n  <span style=\"font-size:36px;\">&#127942;<\/span>\n  <div>\n    <div style=\"font-size:13px;color:#dc2626;font-weight:700;letter-spacing:1px;\">VERDICT<\/div>\n    <div style=\"font-size:18px;font-weight:800;\">Claude Code \u306b\u8ecd\u914d<\/div>\n    <div style=\"font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px;\">\u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u30e2\u30c0\u30f3\u5316\u30fbTypeScript\u578b\u751f\u6210\u30fbNode.js\u30b9\u30af\u30ea\u30d7\u30c8\u4f5c\u6210\u2014\u2014JavaScript\u306e\u958b\u767a\u306b\u304a\u3044\u3066Claude Code\u306f\u30a8\u30c7\u30a3\u30bf\u3068\u540c\u7b49\u304b\u305d\u308c\u4ee5\u4e0a\u306b\u91cd\u8981\u306a\u30c4\u30fc\u30eb\u306b\u306a\u3063\u305f\u3002<\/div>\n  <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJavaScript\u3092\u52c9\u5f37\u3057\u306a\u3051\u308c\u3070\u300d\u3068\u601d\u3063\u3066\u306f\u3044\u308b\u3051\u3069\u3001\u306a\u304b\u306a\u304b\u9032\u3081\u3089\u308c\u306a\u3044\u65b9\u3078\u3002Claude Code\u306b\u300c\u3053\u306e\u30b3\u30fc\u30c9\u3092\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3001\u6b21\u306b\u4f55\u3092\u5b66\u3079\u3070\u3044\u3044\u304b\u6559\u3048\u3066\u300d\u3068\u805e\u304f\u3060\u3051\u3067\u3001\u30d1\u30fc\u30bd\u30ca\u30e9\u30a4\u30ba\u3055\u308c\u305fJavaScript\u5b66\u7fd2\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u304c\u51fa\u3066\u304d\u307e\u3059\u3002\u72ec\u5b66\u3088\u308a\u3082\u4f55\u500d\u3082\u65e9\u304f\u300c\u66f8\u3051\u308bJS\u300d\u304c\u5897\u3048\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">JavaScript\u3068Claude Code\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u696d\u52d9\u81ea\u52d5\u5316\u3092\u4e00\u7dd2\u306b\u8a2d\u8a08\u3057\u307e\u3059<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJavaScript\u3067\u3053\u3093\u306a\u81ea\u52d5\u5316\u304c\u3057\u305f\u3044\u3051\u3069\u66f8\u3051\u306a\u3044\u300d\u300c\u65e2\u5b58\u306eJS\u30b3\u30fc\u30c9\u3092\u30e2\u30c0\u30f3\u306b\u76f4\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u65b9\u306b\u3001\u5f0a\u793e\u5b9f\u904b\u7528\u30ce\u30a6\u30cf\u30a6\u3092\u3082\u3068\u306b\u500b\u5225\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3067\u3082\u300c\u6307\u793a\u3059\u308b\u529b\u300d\u304c\u3042\u308c\u3070Claude Code\u304c\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u304f\u308c\u307e\u3059\u3002\u307e\u305a\u7121\u6599\u76f8\u8ac7\u3067\u3001\u3042\u306a\u305f\u306e\u696d\u52d9\u306b\u6700\u3082\u52b9\u679c\u304c\u51fa\u308bJavaScript\u00d7Claude Code\u6d3b\u7528\u6cd5\u3092\u4e00\u7dd2\u306b\u898b\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);border-radius:16px;padding:36px 32px;margin:48px 0 16px;color:#fff;\">\n  <p style=\"font-size:13px;font-weight:700;color:#dc2626;letter-spacing:2px;margin:0 0 12px;\">NEXT STEP<\/p>\n  <p style=\"font-size:22px;font-weight:800;line-height:1.5;margin:0 0 20px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9\u3092\u3001\u3042\u306a\u305f\u306e\u30d3\u30b8\u30cd\u30b9\u3067<br>\u5b9f\u8df5\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f<\/p>\n  <div style=\"background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:12px;padding:24px;max-width:560px;margin:0 auto;\">\n    <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">AI\u6d3b\u7528\u3092\u81ea\u793e\u3067\u56de\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u65b9\u3078<\/p>\n    <p style=\"font-size:20px;font-weight:800;margin:0 0 12px;\">AI\u9b3c\u7ba1\u7406<\/p>\n    <p style=\"font-size:14px;color:rgba(255,255,255,0.75);margin:0 0 20px;line-height:1.7;\">Claude Code\u30fbCowork\u5c0e\u5165\u652f\u63f4\u304b\u3089\u696d\u52d9\u8a2d\u8a08\u30fb\u793e\u5185\u6d78\u900f\u307e\u3067\u5b9f\u8df5\u30d9\u30fc\u30b9\u3067\u4f34\u8d70\u3002\u300c\u81ea\u793e\u3067\u56de\u305b\u308b\u7d44\u7e54\u300d\u309290\u65e5\u3067\u4f5c\u308b\u7d4c\u55b6\u8005\u5411\u3051\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3002<\/p>\n    <div style=\"text-align:center;\">\n      <a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&utm_medium=article&utm_campaign=cc-js-ecmascript&utm_content=next-step-cta\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#dc2626;color:#fff;font-weight:700;font-size:15px;padding:14px 32px;border-radius:30px;text-decoration:none;\">AI\u9b3c\u7ba1\u7406\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q. JavaScript\u3068ECMAScript\u306f\u540c\u3058\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u53b3\u5bc6\u306b\u306f\u9055\u3044\u307e\u3059\u3002ECMAScript\u306f\u4ed5\u69d8\u66f8\uff08\u6a19\u6e96\u898f\u683c\uff09\u306e\u540d\u524d\u3067\u3001JavaScript\u306f\u305d\u306e\u4ed5\u69d8\u306b\u5f93\u3063\u305f\u5b9f\u88c5\u306e\u540d\u524d\u3067\u3059\u3002\u305f\u3060\u3057\u5b9f\u7528\u4e0a\u306f\u300cJavaScript\u306e\u6a19\u6e96\u4ed5\u69d8 = ECMAScript\u300d\u3068\u7406\u89e3\u3057\u3066\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u4e00\u65b9\u3067ActionScript\uff08Flash\uff09\u3084JScript\uff08IE\uff09\u3082ECMAScript\u4ed5\u69d8\u3092\u5b9f\u88c5\u3057\u305f\u8a00\u8a9e\u3067\u3057\u305f\u304c\u3001\u73fe\u5728\u306f\u3044\u305a\u308c\u3082\u5ec3\u6b62\u3055\u308c\u3066JavaScript\u304c\u4e8b\u5b9f\u4e0a\u306e\u552f\u4e00\u306e\u5b9f\u88c5\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. ES6\u3068ES2015\u306f\u3069\u3061\u3089\u304c\u6b63\u3057\u3044\u547c\u3073\u65b9\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u6b63\u5f0f\u540d\u79f0\u306fES2015\uff08ECMAScript 2015\uff09\u3067\u3059\u3002ES6\u306f2015\u5e74\u4ee5\u524d\u306e\u65e7\u4f53\u5236\u3067\u306e\u756a\u53f7\u8868\u8a18\uff086\u756a\u76ee\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff09\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u6b63\u3057\u304f\u3001\u73fe\u5834\u3067\u306f\u3069\u3061\u3089\u306e\u547c\u3073\u65b9\u3082\u901a\u7528\u3057\u307e\u3059\u30022015\u5e74\u4ee5\u964d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306fES2016\u30fbES2017\u3068\u5e74\u53f7\u8868\u8a18\u304c\u7d71\u4e00\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u300c\u6700\u65b0\u306eECMAScript\u3092\u5b66\u3079\u3070\u3044\u3044\u300d\u3067\u3059\u304b\uff1f\u305d\u308c\u3068\u3082\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u304b\u3089\u5b66\u3076\u3079\u304d\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u73fe\u4ee3\u306e\u5b66\u7fd2\u306b\u304a\u3044\u3066\u306f\u6700\u65b0\u306e\u30e2\u30c0\u30f3JavaScript\uff08ES2015\u4ee5\u964d\uff09\u306e\u66f8\u304d\u65b9\u304b\u3089\u5b66\u3076\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u300cvar\u306f\u306a\u305c\u4f7f\u308f\u306a\u3044\u306e\u304b\u300d\u300cPromise\u304c\u751f\u307e\u308c\u308b\u524d\u306f\u3069\u3046\u66f8\u3044\u3066\u3044\u305f\u304b\u300d\u3068\u3044\u3046\u6b74\u53f2\u7684\u6587\u8108\u3092\u77e5\u308b\u3053\u3068\u3067\u3001\u65b0\u6a5f\u80fd\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u3088\u308a\u6df1\u304f\u7406\u89e3\u3067\u304d\u307e\u3059\u3002\u53e4\u3044\u66f8\u304d\u65b9\u3092\u899a\u3048\u308b\u3088\u308a\u3082\u300c\u306a\u305c\u65b0\u3057\u3044\u66f8\u304d\u65b9\u304c\u751f\u307e\u308c\u305f\u304b\u300d\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. TypeScript\u3092\u4f7f\u3048\u3070ECMAScript\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u5dee\u7570\u306f\u6c17\u306b\u3057\u306a\u304f\u3066\u3088\u304f\u306a\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. TypeScript\u3092\u4f7f\u3063\u3066\u3082\u3001\u51fa\u529b\u5148\u306eJavaScript\uff08tsconfig.json\u306etarget\u8a2d\u5b9a\uff09\u3092\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3059\u308b\u304b\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002TypeScript\u306f\u300c\u578b\u30c1\u30a7\u30c3\u30af\u300d\u306e\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u307e\u3059\u304c\u3001\u30d6\u30e9\u30a6\u30b6\u4e92\u63db\u6027\u306e\u554f\u984c\u306fBabel\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u304b\u3001TypeScript\u306etarget\u8a2d\u5b9a\u3067\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u5bfe\u51e6\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Babel\u3092\u4f7f\u308f\u305a\u306b\u6700\u65b0\u306eECMAScript\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u5927\u4e08\u592b\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u5bfe\u8c61\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u308a\u307e\u3059\u30022025\u5e74\u4ee5\u964d\u306e\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\uff08Chrome\u30fbFirefox\u30fbSafari\u30fbEdge\u6700\u65b0\u7248\uff09\u3067\u3042\u308c\u3070ES2020\u301cES2022\u306e\u591a\u304f\u306e\u6a5f\u80fd\u304c\u30cd\u30a4\u30c6\u30a3\u30d6\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002IE11\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u4e0d\u8981\u306a\u5834\u5408\u306fBabel\u306a\u3057\u3067\u6700\u65b0\u6a5f\u80fd\u3092\u4f7f\u3048\u307e\u3059\u3002\u305f\u3060\u3057Node.js\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u308a\u4e00\u90e8\u6a5f\u80fd\u304c\u4f7f\u3048\u306a\u3044\u5834\u5408\u304c\u3042\u308b\u305f\u3081\u3001\u4f7f\u7528\u74b0\u5883\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Claude Code\u306fJavaScript\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u307e\u3059\u304b\uff1f \u4fe1\u983c\u3067\u304d\u308b\u54c1\u8cea\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u306f\u3044\u3001Claude Code\u306fJavaScript\u30fbTypeScript\u306e\u30b3\u30fc\u30c9\u3092\u9ad8\u54c1\u8cea\u3067\u751f\u6210\u3067\u304d\u307e\u3059\u3002\u5358\u7d14\u306a\u30b9\u30af\u30ea\u30d7\u30c8\u304b\u3089\u8907\u96d1\u306aAPI\u306e\u7d71\u5408\u307e\u3067\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306f\u5fc5\u305a\u52d5\u4f5c\u30c6\u30b9\u30c8\u3092\u884c\u3044\u3001\u7279\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u308f\u308b\u90e8\u5206\uff08\u8a8d\u8a3c\u30fb\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30fbSQL\u30af\u30a8\u30ea\u7b49\uff09\u306f\u5c02\u9580\u5bb6\u306b\u3088\u308b\u30ec\u30d3\u30e5\u30fc\u3092\u63a8\u5968\u3057\u307e\u3059\u3002Claude Code\u306f\u300c\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u751f\u7523\u6027\u3092\u4e0a\u3052\u308b\u30c4\u30fc\u30eb\u300d\u3067\u3042\u308a\u300c\u30c6\u30b9\u30c8\u30fb\u30ec\u30d3\u30e5\u30fc\u3092\u7701\u7565\u3067\u304d\u308b\u30c4\u30fc\u30eb\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. ECMAScript\u306e\u6b21\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff08ES2025\uff09\u306b\u306f\u3069\u3093\u306a\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. 2025\u5e746\u6708\u516c\u958b\u4e88\u5b9a\u306eES2025\uff08TC39 Stage 4\u78ba\u5b9a\u5206\uff09\u306b\u306f\u3001Import Assertions\uff08\u30e2\u30b8\u30e5\u30fc\u30eb\u30a4\u30f3\u30dd\u30fc\u30c8\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\uff09\u30fbTemporal API\uff08\u65e5\u6642\u51e6\u7406\u306e\u6539\u5584\u3001\u73fe\u5728\u306eDate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u554f\u984c\u3092\u89e3\u6c7a\uff09\u30fbArray.fromAsync\uff08\u975e\u540c\u671f\u30a4\u30c6\u30e9\u30d6\u30eb\u304b\u3089\u306e\u914d\u5217\u751f\u6210\uff09\u7b49\u304c\u542b\u307e\u308c\u308b\u898b\u8fbc\u307f\u3067\u3059\u3002Temporal API\u306f\u7279\u306b\u6ce8\u76ee\u5ea6\u304c\u9ad8\u304f\u3001\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u51e6\u7406\u306e\u8907\u96d1\u3055\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"JavaScript\u3068ECMAScript\u306f\u540c\u3058\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u53b3\u5bc6\u306b\u306f\u9055\u3044\u307e\u3059\u3002ECMAScript\u306f\u4ed5\u69d8\u66f8\uff08\u6a19\u6e96\u898f\u683c\uff09\u306e\u540d\u524d\u3067\u3001JavaScript\u306f\u305d\u306e\u4ed5\u69d8\u306b\u5f93\u3063\u305f\u5b9f\u88c5\u306e\u540d\u524d\u3067\u3059\u3002\u305f\u3060\u3057\u5b9f\u7528\u4e0a\u306f\u300cJavaScript\u306e\u6a19\u6e96\u4ed5\u69d8 = ECMAScript\u300d\u3068\u7406\u89e3\u3057\u3066\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u4e00\u65b9\u3067ActionScript\uff08Flash\uff09\u3084JScript\uff08IE\uff09\u3082ECMAScript\u4ed5\u69d8\u3092\u5b9f\u88c5\u3057\u305f\u8a00\u8a9e\u3067\u3057\u305f\u304c\u3001\u73fe\u5728\u306f\u3044\u305a\u308c\u3082\u5ec3\u6b62\u3055\u308c\u3066JavaScript\u304c\u4e8b\u5b9f\u4e0a\u306e\u552f\u4e00\u306e\u5b9f\u88c5\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"ES6\u3068ES2015\u306f\u3069\u3061\u3089\u304c\u6b63\u3057\u3044\u547c\u3073\u65b9\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u6b63\u5f0f\u540d\u79f0\u306fES2015\uff08ECMAScript 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