{"id":25425,"date":"2026-08-01T10:43:53","date_gmt":"2026-08-01T01:43:53","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=25425"},"modified":"2026-08-08T15:25:37","modified_gmt":"2026-08-08T06:25:37","slug":"cc-jquery-closest","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-jquery-closest\/","title":{"rendered":"\u30102026\u5e748\u6708\u6700\u65b0\u3011jQuery\u306eclosest()\u3068\u306f\uff1f\u89aa\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u4f7f\u3044\u65b9\u304b\u3089\u3001\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u305a\u306b\u81ea\u793e\u30b5\u30a4\u30c8\u3092\u76f4\u3059\u65b9\u6cd5\u307e\u3067"},"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\/08\/thumb-cc-jquery-closest.jpg\" alt=\"\u30102026\u5e748\u6708\u6700\u65b0\u3011jQuery\u306eclosest()\u3068\u306f\uff1f\u89aa\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u4f7f\u3044\u65b9\u304b\u3089\u3001\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u305a\u306b\u81ea\u793e\u30b5\u30a4\u30c8\u3092\u76f4\u3059\u65b9\u6cd5\u307e\u3067\" style=\"width:100%;height:auto;border-radius:12px;display:block;\">\n<\/div>\n\n\n\n\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u6ce8\u6587\u4e00\u89a7\u306e\u524a\u9664\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3089\u3001\u62bc\u3057\u305f\u884c\u3060\u3051\u304c\u6d88\u3048\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u300d\u300c\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u306e\u3001\u3053\u306e\u9805\u76ee\u3060\u3051\u5165\u529b\u6b04\u306e\u8272\u3092\u5909\u3048\u305f\u3044\u300d\u300c\u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3\u30e1\u30cb\u30e5\u30fc\u3067\u3001\u30af\u30ea\u30c3\u30af\u3057\u305f\u898b\u51fa\u3057\u306e\u76f4\u4e0b\u3060\u3051\u958b\u9589\u3055\u305b\u305f\u3044\u300d\u2014\u2014\u3053\u3046\u3057\u305f<strong>\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u3001\u305d\u308c\u304c\u5c5e\u3057\u3066\u3044\u308b\u201c\u3072\u3068\u307e\u3068\u307e\u308a\u306e\u60c5\u5831\u201d\u3092\u7279\u5b9a\u3059\u308b\u300d<\/strong>\u3068\u3044\u3046\u51e6\u7406\u306f\u3001\u696d\u7a2e\u3092\u554f\u308f\u305a\u3042\u3089\u3086\u308b\u81ea\u793e\u30b5\u30a4\u30c8\u30fb\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u753b\u9762\u306b\u767b\u5834\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u3053\u306e\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u3001\u305d\u306e\u89aa\u306b\u3042\u305f\u308b\u60c5\u5831\u306e\u304b\u305f\u307e\u308a\u3092\u81ea\u52d5\u3067\u8fbf\u3063\u3066\u7279\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u4ed5\u7d44\u307f\u306f\u3001Web\u30b5\u30a4\u30c8\u306e\u88cf\u5074\u3067\u3088\u304f\u4f7f\u308f\u308c\u308bjQuery\uff08JavaScript\u3092\u6271\u3044\u3084\u3059\u304f\u3059\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\uff09\u306e<strong>closest()<\/strong>\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u62c5\u3063\u3066\u3044\u307e\u3059\u3002\u30dc\u30bf\u30f3\u3084\u5165\u529b\u6b04\u305d\u306e\u3082\u306e\u3060\u3051\u3067\u306a\u304f\u3001\u300c\u305d\u306e\u8981\u7d20\u304c\u4eca\u3001\u3069\u306e\u884c\u30fb\u3069\u306e\u30ab\u30fc\u30c9\u30fb\u3069\u306e\u30d6\u30ed\u30c3\u30af\u306b\u5c5e\u3057\u3066\u3044\u308b\u304b\u300d\u3092\u81ea\u52d5\u3067\u5224\u5b9a\u3059\u308b\u51e6\u7406\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u30fb\u30c6\u30fc\u30d6\u30eb\u30fb\u4e00\u89a7\u753b\u9762\u306a\u3069\u3001business\u5411\u3051\u30b5\u30a4\u30c8\u306e\u81f3\u308b\u3068\u3053\u308d\u306b\u96a0\u308c\u3066\u3044\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\">closest()\u3068\u805e\u304f\u3068\u300c\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5c02\u9580\u77e5\u8b58\u300d\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3084\u3063\u3066\u3044\u308b\u3053\u3068\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u4e0a\u3078\u4e0a\u3078\u3068\u89aa\u3092\u305f\u3069\u3063\u3066\u3044\u304d\u3001\u76ee\u7684\u306e\u201c\u307e\u3068\u307e\u308a\u201d\u306b\u884c\u304d\u7740\u3044\u305f\u3089\u6b62\u307e\u308b\u300d\u3068\u3044\u3046\u3001\u79c1\u305f\u3061\u304c\u7d19\u306e\u66f8\u985e\u3092\u6574\u7406\u3059\u308b\u3068\u304d\u306b\u7121\u610f\u8b58\u306b\u3084\u3063\u3066\u3044\u308b\u52d5\u4f5c\u3092\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u3082\u5206\u304b\u308b\u5f62\u3067\u66f8\u304d\u4e0b\u3057\u305f\u3060\u3051\u306e\u3082\u306e\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\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001jQuery\u306eclosest()\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u3001\u3088\u304f\u4f3c\u305fparent()\u30fbfind()\u3068\u306e\u9055\u3044\u3001\u696d\u52d9\u30b5\u30a4\u30c8\u3067\u306e\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3\u307e\u3067\u3092\u3001\u696d\u52d9\u306e\u6bd4\u55a9\u306b\u4f8b\u3048\u306a\u304c\u3089\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u6700\u5f8c\u306b\u306f\u300c\u69cb\u6587\u3092\u899a\u3048\u306a\u304f\u3066\u3082\u3001\u76f4\u3057\u305f\u3044\u52d5\u304d\u3092\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308b\u3060\u3051\u3067Claude Code\u304c\u5b9f\u88c5\u3057\u3066\u304f\u308c\u308b\u300d\u3068\u3044\u3046\u9078\u629e\u80a2\u306b\u3064\u3044\u3066\u3082\u89e6\u308c\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3092\u6700\u5f8c\u307e\u3067\u8aad\u3080\u3068\u3001\u6b21\u306e\u5185\u5bb9\u304c\u7406\u89e3\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><strong>closest()\u306e\u57fa\u672c\u69cb\u9020<\/strong>\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u8981\u7d20\u304b\u3089\u3001\u89aa\u65b9\u5411\u3078\u3069\u3046\u8fbf\u3063\u3066\u3044\u304f\u304b\u306e\u8003\u3048\u65b9<\/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\u30fbid\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027\u3067\u306e\u7d5e\u308a\u8fbc\u307f<\/strong>\uff1a\u76ee\u7684\u306e\u300c\u307e\u3068\u307e\u308a\u300d\u3060\u3051\u3092\u30d4\u30f3\u30dd\u30a4\u30f3\u30c8\u3067\u6349\u3048\u308b\u65b9\u6cd5<\/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>parent()\u30fbfind()\u3068\u306e\u9055\u3044<\/strong>\uff1a\u4f3c\u3066\u3044\u308b\u3088\u3046\u3067\u6319\u52d5\u304c\u307e\u3063\u305f\u304f\u7570\u306a\u308b3\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051<\/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\u30fc\u30d6\u30eb\u64cd\u4f5c\u3067\u306e\u5b9f\u8df5\u4f8b<\/strong>\uff1a\u300c\u3069\u306e\u884c\u306e\u30dc\u30bf\u30f3\u304c\u62bc\u3055\u308c\u305f\u304b\u300d\u3092\u7279\u5b9a\u3059\u308b\u5178\u578b\u30d1\u30bf\u30fc\u30f3<\/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>\u696d\u52d9Web\u30b5\u30a4\u30c8\u3067\u306e\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3<\/strong>\uff1a\u30d5\u30a9\u30fc\u30e0\u884c\u524a\u9664\u30fb\u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3\u30fb\u4e00\u89a7\u64cd\u4f5c\u3078\u306e\u5fdc\u7528<\/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>\u69cb\u6587\u3092\u899a\u3048\u306a\u304f\u3066\u3082\u89aa\u8981\u7d20\u306e\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5<\/strong>\uff1a\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3067AI\u306b\u4efb\u305b\u308b\u9078\u629e\u80a2<\/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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">WHAT IS CLOSEST<\/span>\n  <span class=\"section-title\" style=\"display:block;\">closest()\u3068\u306f\u4f55\u304b\u30fb\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u89aa\u3092\u8fbf\u308b\u300d\u3092\u696d\u52d9\u306e\u6bd4\u55a9\u3067\u7406\u89e3\u3059\u308b<\/span>\n  <span class=\"section-desc\">DOM\uff08\u30da\u30fc\u30b8\u306e\u69cb\u9020\uff09\u3092\u300c\u4e0a\u3078\u300d\u305f\u3069\u3063\u3066\u3001\u76ee\u7684\u306e\u307e\u3068\u307e\u308a\u3092\u898b\u3064\u3051\u308b\u4ed5\u7d44\u307f<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u3068\u306f\u3001jQuery\u304c\u63d0\u4f9b\u3059\u308b<strong>\u300c\u4eca\u64cd\u4f5c\u3057\u3066\u3044\u308b\u8981\u7d20\u304b\u3089\u3001\u305d\u306e\u8981\u7d20\u3092\u542b\u3080\u89aa\uff08\u3055\u3089\u306b\u89aa\u306e\u89aa\u2026\uff09\u3092\u4e0a\u65b9\u5411\u306b\u305f\u3069\u3063\u3066\u3044\u304d\u3001\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u306b\u6700\u521d\u306b\u5408\u81f4\u3057\u305f\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u300d<\/strong>\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u82f1\u8a9e\u306e\u300cclosest\uff08\u6700\u3082\u8fd1\u3044\uff09\u300d\u304c\u793a\u3059\u3068\u304a\u308a\u3001\u300c\u81ea\u5206\u306b\u6700\u3082\u8fd1\u3044\u3001\u6761\u4ef6\u306b\u5408\u3046\u5148\u7956\uff08\u89aa\u30fb\u7956\u7236\u6bcd\u306b\u3042\u305f\u308b\u8981\u7d20\uff09\u300d\u3092\u63a2\u3057\u306b\u884c\u304d\u307e\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>DOM\uff08Document Object Model\uff09<\/strong>\uff1a\u30d6\u30e9\u30a6\u30b6\u304cWeb\u30da\u30fc\u30b8\u306eHTML\u3092\u8aad\u307f\u8fbc\u3093\u3060\u3068\u304d\u306b\u4f5c\u308b\u3001\u8981\u7d20\u540c\u58eb\u306e\u89aa\u5b50\u95a2\u4fc2\u3092\u8868\u73fe\u3057\u305f\u6728\u69cb\u9020\uff08\u30c4\u30ea\u30fc\uff09\u306e\u3053\u3068\u3002\u300c\u3053\u306e\u30dc\u30bf\u30f3\u306f\u3001\u3053\u306e\u884c\u306e\u4e2d\u306b\u3042\u308a\u3001\u305d\u306e\u884c\u306f\u3053\u306e\u8868\u306e\u4e2d\u306b\u3042\u308a\u2026\u300d\u3068\u3044\u3046\u3088\u3046\u306b\u3001\u8981\u7d20\u540c\u58eb\u306f\u5fc5\u305a\u3069\u3053\u304b\u306e\u8981\u7d20\u306e\u300c\u5b50\u300d\u3068\u3057\u3066\u5b58\u5728\u3057\u3066\u3044\u308b\u3002closest()\u306f\u3001\u3053\u306eDOM\u306e\u6728\u69cb\u9020\u3092\u81ea\u5206\u306e\u4f4d\u7f6e\u304b\u3089\u6839\u3063\u3053\uff08\u4e0a\uff09\u306e\u65b9\u5411\u3078\u305f\u3069\u3063\u3066\u3044\u304f\u51e6\u7406\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>closest()<\/strong>\uff1a\u300c\u81ea\u5206\u81ea\u8eab\u3001\u307e\u305f\u306f\u305d\u306e\u89aa\u30fb\u7956\u7236\u6bcd\u2026\u306b\u3042\u305f\u308b\u5148\u7956\u8981\u7d20\u306e\u4e2d\u304b\u3089\u3001\u6307\u5b9a\u3057\u305f\u30bb\u30ec\u30af\u30bf\u306b\u6700\u521d\u306b\u4e00\u81f4\u3059\u308b\u3082\u306e\u3092\u53d6\u5f97\u3059\u308b\u300djQuery\u306e\u30e1\u30bd\u30c3\u30c9\u3002\u81ea\u5206\u81ea\u8eab\u3082\u691c\u7d22\u5bfe\u8c61\u306b\u542b\u307e\u308c\u308b\u70b9\u3001\u30de\u30c3\u30c1\u3057\u305f\u6642\u70b9\u3067\u305d\u308c\u4ee5\u4e0a\u306f\u4e0a\u306b\u8fbf\u3089\u305a1\u3064\u3060\u3051\u8fd4\u3059\u70b9\u304c\u7279\u5fb4\u3002\u30de\u30c3\u30c1\u3059\u308b\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u3051\u308c\u3070\u3001\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u8a72\u5f53\u306a\u3057\uff09\u304c\u8fd4\u308b\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u696d\u52d9\u306e\u5834\u9762\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u7d19\u306e\u6ce8\u6587\u66f8\u304c\u4e26\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u3092\u6574\u7406\u3057\u3066\u3044\u308b\u62c5\u5f53\u8005\u306f\u3001\u65e5\u3005\u3053\u3093\u306a\u4f5c\u696d\u3092\u3057\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u3042\u308b1\u4ef6\u306e<br>\u300c\u524a\u9664\u300d\u5370\u3092\u898b\u308b<\/strong><br><span style=\"font-size:12px;\">\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f<br>\u30dc\u30bf\u30f3\u306e\u4f4d\u7f6e<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u305d\u306e\u5370\u304c\u62bc\u3055\u308c\u305f<br>\u7528\u7d19\u3092\u4e0a\u306b\u3081\u304f\u308b<\/strong><br><span style=\"font-size:12px;\">1\u3064\u4e0a\u306e\u968e\u5c64\u3092<br>\u78ba\u8a8d\u3059\u308b<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u300c\u3053\u306e\u7528\u7d19\u306f<br>\u6ce8\u6587\u66f8\u304b\u300d\u3092\u78ba\u8a8d<\/strong><br><span style=\"font-size:12px;\">\u6761\u4ef6\u306b\u5408\u3046<br>\u307e\u3068\u307e\u308a\u304b\u5224\u5b9a<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5408\u3063\u3066\u3044\u308c\u3070<br>\u305d\u306e\u7528\u7d19\u3092\u7279\u5b9a<\/strong><br><span style=\"font-size:12px;\">\u898b\u3064\u304b\u3063\u305f\u6642\u70b9\u3067<br>\u63a2\u7d22\u3092\u7d42\u3048\u308b<\/span><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u306e\u4f4d\u7f6e\u304b\u3089\u3001\u4e0a\u3078\u4e0a\u3078\u3068\u89aa\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u3001\u76ee\u7684\u306e\u201c\u307e\u3068\u307e\u308a\u201d\uff08\u3053\u306e\u4f8b\u3067\u306f\u6ce8\u6587\u66f8\u3068\u3044\u3046\u5358\u4f4d\uff09\u304c\u898b\u3064\u304b\u3063\u305f\u3089\u6b62\u307e\u308b\u300d\u3068\u3044\u3046\u4e00\u9023\u306e\u52d5\u4f5c\u3092\u3001jQuery\u3067\u66f8\u304f\u3068\u304a\u304a\u3088\u305d\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u696d\u52d9\u30eb\u30fc\u30eb\uff1a\u524a\u9664\u30dc\u30bf\u30f3\u304c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u3089\u3001\u305d\u306e\u884c(\u6ce8\u6587)\u3092\u7279\u5b9a\u3059\u308b\n$(&#x27;.delete-btn&#x27;).on(&#x27;click&#x27;, function () {\n    \/\/ this = \u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u81ea\u8eab\n    \/\/ closest(&#x27;.order-row&#x27;) = \u81ea\u5206\u304b\u3089\u4e0a\u3078\u305f\u3069\u308a\u3001\n    \/\/  \u6700\u521d\u306b\u898b\u3064\u304b\u3063\u305f\u300c.order-row\u300d\u30af\u30e9\u30b9\u306e\u8981\u7d20\u3092\u53d6\u5f97\n    var $row = $(this).closest(&#x27;.order-row&#x27;);\n\n    console.log($row); \/\/ \u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\uff081\u4ef6\uff09\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b3\u30fc\u30c9\u306e\u69cb\u9020\u81ea\u4f53\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002<strong>closest()\u306e\u4e38\u62ec\u5f27\u300c()\u300d\u306b\u3001\u63a2\u3057\u305f\u3044\u89aa\u8981\u7d20\u306e\u6761\u4ef6\uff08\u30bb\u30ec\u30af\u30bf\uff09<\/strong>\u3092\u66f8\u304d\u307e\u3059\u3002\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u8981\u7d20\uff08this\uff09\u3092\u8d77\u70b9\u306b\u3001\u6761\u4ef6\u306b\u5408\u3046\u5148\u7956\u8981\u7d20\u304c\u898b\u3064\u304b\u308b\u307e\u3067\u81ea\u52d5\u7684\u306b\u4e0a\u3078\u8fbf\u3063\u3066\u304f\u308c\u308b\u306e\u304cclosest()\u306e\u5f79\u5272\u3067\u3059\u3002<\/p>\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\">\u91cd\u8981\u306a\u306e\u306f\u3001closest()\u81ea\u4f53\u306f\u300cAI\u3084\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5c02\u9580\u77e5\u8b58\u300d\u3067\u306f\u306a\u304f\u3001\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u3001\u76ee\u7684\u306e\u307e\u3068\u307e\u308a\u3092\u898b\u3064\u3051\u308b\u307e\u3067\u4e0a\u3078\u63a2\u3057\u306b\u884c\u304f\u300d\u3068\u3044\u3046\u3001\u4eba\u9593\u304c\u7d19\u306e\u66f8\u985e\u3067\u3084\u308b\u52d5\u4f5c\u3092\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u5b9f\u884c\u3067\u304d\u308b\u5f62\u5f0f\u306b\u66f8\u304d\u63db\u3048\u305f\u3082\u306e\u3060\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3068\u3001\u69cb\u6587\u3092\u6697\u8a18\u3059\u308b\u3053\u3068\u306f\u5225\u7269\u3067\u3059\u3002<\/div>\n<\/div>\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;\">\u307e\u305a\u306f\u300c\u3069\u306e\u307e\u3068\u307e\u308a\u3092\u7279\u5b9a\u3057\u305f\u3044\u304b\u300d\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u8449\u306b\u3059\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u3044\u304d\u306a\u308a\u30b3\u30fc\u30c9\u3092\u66f8\u3053\u3046\u3068\u305b\u305a\u3001\u307e\u305a\u300c\u524a\u9664\u30dc\u30bf\u30f3\u304c\u62bc\u3055\u308c\u305f\u3089\u3001\u305d\u306e\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\uff08\u6ce8\u65871\u4ef6\u5206\uff09\u3092\u7279\u5b9a\u3057\u305f\u3044\u300d\u306e\u3088\u3046\u306b\u3001\u81ea\u5206\u304c\u5b9f\u73fe\u3057\u305f\u3044\u52d5\u304d\u3092\u65e5\u672c\u8a9e\u306e\u6587\u7ae0\u3067\u66f8\u304d\u51fa\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u6587\u7ae0\u304c\u305d\u306e\u307e\u307e\u3001closest()\u306b\u6e21\u3059\u30bb\u30ec\u30af\u30bf\u306e\u8a2d\u8a08\u56f3\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u8003\u3048\u65b9\u306f\u3001\u5f8c\u8ff0\u3059\u308bClaude Code\u3078\u306e\u4f9d\u983c\u306e\u4ed5\u65b9\u306b\u3082\u76f4\u7d50\u3057\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">BASIC USAGE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">closest()\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\uff1a\u69cb\u6587\u3068\u30de\u30c3\u30c1\u306e\u4ed5\u7d44\u307f<\/span>\n  <span class=\"section-desc\">\u300c\u81ea\u5206\u81ea\u8eab\u300d\u3082\u691c\u7d22\u5bfe\u8c61\u306b\u542b\u307e\u308c\u308b\u70b9\u304c\u6700\u5927\u306e\u30dd\u30a4\u30f3\u30c8<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u306e\u57fa\u672c\u69cb\u6587\u306f<strong>$(\u8981\u7d20).closest(\u30bb\u30ec\u30af\u30bf)<\/strong>\u3068\u3044\u3046\u5f62\u3067\u3059\u3002\u30bb\u30ec\u30af\u30bf\u306b\u306f\u3001CSS\u3068\u540c\u3058\u66f8\u304d\u65b9\uff08\u30af\u30e9\u30b9\u540d\u306a\u3089\u300c.\u30af\u30e9\u30b9\u540d\u300d\u3001id\u540d\u306a\u3089\u300c#id\u540d\u300d\u3001\u30bf\u30b0\u540d\u306a\u3089\u305d\u306e\u307e\u307e\u306e\u540d\u524d\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30bb\u30ec\u30af\u30bf<\/strong>\uff1aHTML\u306e\u4e2d\u304b\u3089\u300c\u3069\u306e\u8981\u7d20\u3092\u9078\u3076\u304b\u300d\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u66f8\u304d\u65b9\u306e\u30eb\u30fc\u30eb\u3002\u300c.order-row\u300d\u306a\u3089class=\"order-row\"\u304c\u4ed8\u3044\u305f\u8981\u7d20\u3001\u300c#result\u300d\u306a\u3089id=\"result\"\u304c\u4ed8\u3044\u305f\u8981\u7d20\u3001\u300ctr\u300d\u306a\u3089\u3059\u3079\u3066\u306e<tr>\u30bf\u30b0\u3092\u6307\u3059\u3002closest()\u30fbfind()\u30fbparent()\u306a\u3069\u3001jQuery\u306e\u307b\u3068\u3093\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3053\u306e\u30bb\u30ec\u30af\u30bf\u3092\u6761\u4ef6\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u57fa\u672c\u69cb\u6587\n$(\u8981\u7d20).closest(\u30bb\u30ec\u30af\u30bf)\n\n\/\/ \u5177\u4f53\u4f8b\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30ea\u30f3\u30af\u304b\u3089\u3001\u76f4\u8fd1\u306e.card\u8981\u7d20\u3092\u53d6\u5f97\n$(&#x27;.card-link&#x27;).on(&#x27;click&#x27;, function (e) {\n    e.preventDefault();\n    var $card = $(this).closest(&#x27;.card&#x27;);\n    $card.toggleClass(&#x27;is-selected&#x27;);\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u62bc\u3055\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u304c\u3001<strong>closest()\u306f\u300c\u81ea\u5206\u81ea\u8eab\u300d\u3082\u691c\u7d22\u5bfe\u8c61\u306b\u542b\u3080<\/strong>\u3068\u3044\u3046\u4ed5\u69d8\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u8981\u7d20\u81ea\u4f53\u304c\u6307\u5b9a\u3057\u305f\u30bb\u30ec\u30af\u30bf\u306b\u4e00\u81f4\u3057\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u6642\u70b9\u3067\uff08\u4e0a\u306b\u8fbf\u308b\u3053\u3068\u306a\u304f\uff09\u305d\u306e\u8981\u7d20\u81ea\u8eab\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u4e00\u81f4\u3057\u306a\u3051\u308c\u30701\u3064\u4e0a\u306e\u89aa\u3001\u305d\u308c\u3082\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u3055\u3089\u306b1\u3064\u4e0a\u2026\u2026\u3068\u3044\u3046\u5177\u5408\u306b\u3001<strong>document\uff08\u30da\u30fc\u30b8\u5168\u4f53\u306e root\uff09\u306b\u5230\u9054\u3059\u308b\u307e\u3067\u63a2\u7d22\u3092\u7d9a\u3051\u307e\u3059<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2-1. \u30de\u30c3\u30c1\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306f\u300c\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u304c\u8fd4\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u308c\u3060\u3051\u4e0a\u307e\u3067\u8fbf\u3063\u3066\u3082\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u3001closest()\u306f<strong>\u8981\u7d20\u6570\u304c0\u4ef6\u306e\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong>\u3092\u8fd4\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u306b\u306f\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u300d\u72b6\u614b\u3092\u30b3\u30fc\u30c9\u5074\u3067\u3069\u3046\u6271\u3046\u304b\u304c\u3001\u6b21\u7ae0\u4ee5\u964d\u3067\u8aac\u660e\u3059\u308b\u5b9f\u8df5\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;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:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u30bb\u30ec\u30af\u30bf\u306e\u30bf\u30a4\u30d7\u30df\u30b9\u306b\u6ce8\u610f<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">closest('.oder-row')\u306e\u3088\u3046\u306b\u30af\u30e9\u30b9\u540d\u3092\u6253\u3061\u9593\u9055\u3048\u3066\u3082\u3001jQuery\u306f\u30a8\u30e9\u30fc\u3092\u51fa\u3057\u307e\u305b\u3093\u3002\u5358\u306b\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u300d\u3068\u3057\u3066\u7a7a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3060\u3051\u306a\u306e\u3067\u3001\u52d5\u4f5c\u78ba\u8a8d\u3092\u3057\u306a\u3044\u3068\u6c17\u3065\u304d\u306b\u304f\u3044\u5178\u578b\u7684\u306a\u30df\u30b9\u3067\u3059\u3002\u5b9f\u969b\u306eHTML\u306b\u66f8\u304b\u308c\u3066\u3044\u308b\u30af\u30e9\u30b9\u540d\u30fbid\u540d\u3068\u3001\u30b3\u30fc\u30c9\u5074\u306e\u30bb\u30ec\u30af\u30bf\u304c\u5b8c\u5168\u306b\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3001\u5fc5\u305a\u898b\u6bd4\u3079\u3066\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\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\">\u300c\u81ea\u5206\u81ea\u8eab\u3082\u691c\u7d22\u5bfe\u8c61\u306b\u542b\u307e\u308c\u308b\u300d\u3068\u3044\u3046\u4ed5\u69d8\u306f\u3001\u6b21\u306e\u7ae0\u3067\u7d39\u4ecb\u3059\u308b\u30af\u30e9\u30b9\u30fbid\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u4f7f\u3044\u5206\u3051\u3092\u7406\u89e3\u3059\u308b\u3046\u3048\u3067\u3082\u91cd\u8981\u306a\u524d\u63d0\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u306f\u610f\u8b58\u3057\u3066\u8aad\u307f\u9032\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">SELECTOR PATTERNS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">class\u30fbid\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027\u3092\u4f7f\u3063\u305f\u89aa\u8981\u7d20\u306e\u7d5e\u308a\u8fbc\u307f<\/span>\n  <span class=\"section-desc\">\u76ee\u7684\u306e\u300c\u307e\u3068\u307e\u308a\u300d\u3060\u3051\u3092\u30d4\u30f3\u30dd\u30a4\u30f3\u30c8\u3067\u6349\u3048\u308b\u305f\u3081\u306e3\u3064\u306e\u6307\u5b9a\u65b9\u6cd5<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u306b\u6e21\u3059\u30bb\u30ec\u30af\u30bf\u306f\u3001\u696d\u52d9\u30b5\u30a4\u30c8\u306e\u73fe\u5834\u3067\u306f\u4e3b\u306b<strong>class\uff08\u30af\u30e9\u30b9\uff09\u30fbid\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027<\/strong>\u306e3\u30d1\u30bf\u30fc\u30f3\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u5411\u3044\u3066\u3044\u308b\u5834\u9762\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u6307\u5b9a\u65b9\u6cd5<\/th><th>\u66f8\u304d\u65b9\u306e\u4f8b<\/th><th>\u5411\u3044\u3066\u3044\u308b\u5834\u9762<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>class<\/td><td>closest('.order-row')<\/td><td>\u540c\u3058\u69cb\u9020\u304c\u4e00\u89a7\u3067\u7e70\u308a\u8fd4\u3055\u308c\u308b\u8981\u7d20\uff08\u884c\u30fb\u30ab\u30fc\u30c9\u306a\u3069\uff09\u3092\u5bfe\u8c61\u306b\u3057\u305f\u3044\u3068\u304d<\/td><\/tr>\n<tr><td>id<\/td><td>closest('#main-form')<\/td><td>\u30da\u30fc\u30b8\u5185\u306b1\u3064\u3057\u304b\u306a\u3044\u3001\u7279\u5b9a\u306e\u8981\u7d20\u3092\u30d4\u30f3\u30dd\u30a4\u30f3\u30c8\u3067\u5bfe\u8c61\u306b\u3057\u305f\u3044\u3068\u304d<\/td><\/tr>\n<tr><td>\u30c7\u30fc\u30bf\u5c5e\u6027<\/td><td>closest('[data-id]')<\/td><td>\u8981\u7d20\u306b\u57cb\u3081\u8fbc\u3093\u3060\u56fa\u6709\u306e\u5024\uff08\u6ce8\u6587\u756a\u53f7\u306a\u3069\uff09\u3092\u5f8c\u304b\u3089\u53d6\u308a\u51fa\u3057\u305f\u3044\u3068\u304d<\/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>\u30c7\u30fc\u30bf\u5c5e\u6027\uff08data-*\uff09<\/strong>\uff1aHTML\u306e\u30bf\u30b0\u306b\u300cdata-\u300d\u304b\u3089\u59cb\u307e\u308b\u540d\u524d\u3067\u81ea\u7531\u306b\u60c5\u5831\u3092\u57cb\u3081\u8fbc\u3081\u308b\u4ed5\u7d44\u307f\u3002\u305f\u3068\u3048\u3070<tr data-order-id=\"1023\">\u3068\u66f8\u3044\u3066\u304a\u3051\u3070\u3001jQuery\u306e.attr('data-order-id')\u3084querySelector\u306e[data-order-id]\u3067\u3001\u305d\u306e\u884c\u304c\u300c\u6ce8\u6587\u756a\u53f71023\u300d\u3067\u3042\u308b\u3053\u3068\u3092\u30b3\u30fc\u30c9\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u3002\u884c\u3084\u30ab\u30fc\u30c9\u306b\u7d10\u3065\u304f\u56fa\u6709ID\u3092\u6301\u305f\u305b\u305f\u3044\u3068\u304d\u306b\u3088\u304f\u4f7f\u308f\u308c\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u30c7\u30fc\u30bf\u5c5e\u6027\u3092\u4f7f\u3063\u3066\u3001\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u884c\u306e\u300c\u6ce8\u6587\u756a\u53f7\u300d\u3092\u53d6\u5f97\u3059\u308b\u4f8b\n\/\/ HTML\u5074: &lt;tr class=&quot;order-row&quot; data-order-id=&quot;1023&quot;&gt;...&lt;button class=&quot;delete-btn&quot;&gt;\u524a\u9664&lt;\/button&gt;&lt;\/tr&gt;\n\n$(&#x27;.delete-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $row = $(this).closest(&#x27;[data-order-id]&#x27;);\n    var orderId = $row.data(&#x27;order-id&#x27;);\n    console.log(&#x27;\u524a\u9664\u5bfe\u8c61\u306e\u6ce8\u6587\u756a\u53f7: &#x27; + orderId); \/\/ &quot;\u524a\u9664\u5bfe\u8c61\u306e\u6ce8\u6587\u756a\u53f7: 1023&quot;\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u306e\u3088\u3046\u306b\u3001<strong>\u30c7\u30fc\u30bf\u5c5e\u6027\u3092\u76ee\u5370\u3068\u3057\u3066\u6301\u305f\u305b\u3066\u304a\u304d\u3001closest()\u3067\u8a72\u5f53\u884c\u3092\u53d6\u5f97\u3057\u305f\u3046\u3048\u3067\u3001\u305d\u3053\u304b\u3089\u56fa\u6709\u306e\u5024\uff08\u6ce8\u6587\u756a\u53f7\u306a\u3069\uff09\u3092\u8aad\u307f\u51fa\u3059<\/strong>\u3068\u3044\u3046\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u30c6\u30fc\u30d6\u30eb\u64cd\u4f5c\u3067\u975e\u5e38\u306b\u3088\u304f\u4f7f\u308f\u308c\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. \u30bb\u30ec\u30af\u30bf\u306f\u300c\u8907\u6570\u6761\u4ef6\u300d\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">closest('.order-row.is-active')\u306e\u3088\u3046\u306b\u3001\u30bb\u30ec\u30af\u30bf\u3092\u30b9\u30da\u30fc\u30b9\u306a\u3057\u3067\u4e26\u3079\u308b\u3068\u3001<strong>\u4e21\u65b9\u306e\u30af\u30e9\u30b9\u3092\u6301\u3064\u8981\u7d20\u3060\u3051<\/strong>\u306b\u30de\u30c3\u30c1\u3055\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u300c\u6709\u52b9\u306a\u6ce8\u6587\u884c\u3060\u3051\u3092\u5bfe\u8c61\u306b\u3057\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u3001\u6761\u4ef6\u3092\u7d5e\u308a\u8fbc\u3093\u3060\u51e6\u7406\u3092\u7d44\u307f\u305f\u3044\u3068\u304d\u306b\u4f7f\u3044\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;\">\u8ff7\u3063\u305f\u3089\u30af\u30e9\u30b9\u540d\u3001\u56fa\u6709\u306e\u5024\u3092\u6271\u3046\u306a\u3089\u30c7\u30fc\u30bf\u5c5e\u6027<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c\u540c\u3058\u69cb\u9020\u304c\u7e70\u308a\u8fd4\u3055\u308c\u308b\u884c\u30fb\u30ab\u30fc\u30c9\u3092\u5bfe\u8c61\u306b\u3057\u305f\u3044\u300d\u306a\u3089class\u3001\u300c\u305d\u306e\u8981\u7d20\u306b\u7d10\u3065\u304f\u56fa\u6709\u306e\u5024\uff08ID\u30fb\u91d1\u984d\u306a\u3069\uff09\u3082\u4e00\u7dd2\u306b\u6271\u3044\u305f\u3044\u300d\u306a\u3089\u30c7\u30fc\u30bf\u5c5e\u6027\u3001\u3068\u3044\u3046\u306e\u304c\u5b9f\u52d9\u3067\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u5206\u3051\u306e\u76ee\u5b89\u3067\u3059\u3002id\u6307\u5b9a\u306f\u300c\u30da\u30fc\u30b8\u306b1\u3064\u3057\u304b\u306a\u3044\u7279\u5225\u306a\u8981\u7d20\u300d\u306b\u9650\u5b9a\u3057\u3066\u4f7f\u3046\u3068\u3001\u5f8c\u304b\u3089\u69cb\u9020\u3092\u5909\u66f4\u3057\u305f\u3068\u304d\u306e\u4fee\u6b63\u7b87\u6240\u304c\u5c11\u306a\u304f\u3066\u6e08\u307f\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">SEARCH CONTEXT<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u691c\u7d22\u7bc4\u56f2\u3092\u6307\u5b9a\u3059\u308b\u7b2c2\u5f15\u6570\uff08context\uff09<\/span>\n  <span class=\"section-desc\">\u300c\u3069\u3053\u307e\u3067\u4e0a\u3092\u63a2\u3057\u306b\u884c\u3063\u3066\u3044\u3044\u304b\u300d\u306b\u6b6f\u6b62\u3081\u3092\u304b\u3051\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u306b\u306f\u3001\u30bb\u30ec\u30af\u30bf\u306b\u52a0\u3048\u3066<strong>\u7b2c2\u5f15\u6570\uff08context\uff09<\/strong>\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u3053\u306e\u8981\u7d20\u306e\u4e2d\u3060\u3051\u3092\u691c\u7d22\u7bc4\u56f2\u306b\u3059\u308b\u300d\u3068\u3044\u3046\u4e0a\u9650\u3092\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3001\u66f8\u5f0f\u306f<strong>closest(\u30bb\u30ec\u30af\u30bf, context)<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u7b2c2\u5f15\u6570\u3067\u691c\u7d22\u7bc4\u56f2\u3092\u300c.dashboard\u300d\u306e\u4e2d\u3060\u3051\u306b\u9650\u5b9a\u3059\u308b\nvar $panel = document.querySelector(&#x27;.dashboard&#x27;);\n\n$(&#x27;.close-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $box = $(this).closest(&#x27;.info-box&#x27;, $panel);\n    \/\/ .dashboard \u306e\u4e2d\u3067\u3057\u304b .info-box \u3092\u63a2\u3057\u306b\u884c\u304b\u306a\u3044\n    $box.hide();\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u306f\u7b2c2\u5f15\u6570\u3092\u7701\u7565\u3057\u3066\u3082\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5168\u4f53\uff08\u30da\u30fc\u30b8\u5168\u4f53\uff09\u304c\u691c\u7d22\u7bc4\u56f2\u306b\u306a\u308a\u307e\u3059\u304c\u3001<strong>1\u3064\u306e\u30da\u30fc\u30b8\u306e\u4e2d\u306b\u4f3c\u305f\u69cb\u9020\u306e\u30d6\u30ed\u30c3\u30af\u304c\u8907\u6570\u5b58\u5728\u3059\u308b<\/strong>\u5834\u5408\u3001context \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u300c\u3053\u306e\u30d1\u30cd\u30eb\u306e\u4e2d\u3060\u3051\u3092\u63a2\u3059\u300d\u3068\u3044\u3046\u5236\u9650\u3092\u304b\u3051\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u610f\u56f3\u3057\u306a\u3044\u5225\u306e\u5834\u6240\u306b\u3042\u308b\u8981\u7d20\u3092\u8aa4\u3063\u3066\u53d6\u5f97\u3057\u3066\u3057\u307e\u3046\u4e8b\u6545\u3092\u9632\u3052\u307e\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>context\uff08\u7b2c2\u5f15\u6570\uff09<\/strong>\uff1aclosest()\u3084find()\u306a\u3069\u306ejQuery\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u305b\u308b\u3001\u691c\u7d22\u7bc4\u56f2\u3092\u9650\u5b9a\u3059\u308b\u305f\u3081\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u5f15\u6570\u3002\u6307\u5b9a\u3057\u305f\u8981\u7d20\u306e\u5b50\u5b6b\u306e\u7bc4\u56f2\u3067\u306e\u307f\u691c\u7d22\u304c\u884c\u308f\u308c\u3001\u305d\u308c\u3088\u308a\u5916\u5074\u306e\u8981\u7d20\u306f\u30de\u30c3\u30c1\u306e\u5bfe\u8c61\u304b\u3089\u9664\u5916\u3055\u308c\u308b\u30021\u30da\u30fc\u30b8\u306b\u540c\u3058\u69cb\u9020\u306e\u30d1\u30cd\u30eb\u3084\u30ab\u30fc\u30c9\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u306e\u8aa4\u7206\u9632\u6b62\u306b\u4f7f\u308f\u308c\u308b\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4-1. \u5b9f\u52d9\u3067\u306f\u7701\u7565\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u307b\u3068\u3093\u3069<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306e\u696d\u52d9\u30b5\u30a4\u30c8\u3067\u306f\u3001closest()\u306b\u6e21\u3059\u30af\u30e9\u30b9\u540d\u3084\u30c7\u30fc\u30bf\u5c5e\u6027\u304c\u305d\u3082\u305d\u3082\u4e00\u610f\uff08\u4ed6\u306e\u5834\u6240\u3068\u91cd\u8907\u3057\u306a\u3044\uff09\u3067\u3042\u308b\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001<strong>\u7b2c2\u5f15\u6570\u3092\u7701\u7565\u3057\u3066\u305d\u306e\u307e\u307e\u4f7f\u3046<\/strong>\u30b1\u30fc\u30b9\u304c\u5927\u534a\u3067\u3059\u3002\u8907\u96d1\u306a\u30da\u30fc\u30b8\u69cb\u6210\u3067\u300c\u540c\u3058\u30af\u30e9\u30b9\u540d\u306e\u30d6\u30ed\u30c3\u30af\u304c\u8907\u6570\u7b87\u6240\u306b\u3042\u308b\u300d\u3088\u3046\u306a\u5834\u5408\u306b\u3060\u3051\u3001\u3053\u306e\u7b2c2\u5f15\u6570\u306e\u5b58\u5728\u3092\u601d\u3044\u51fa\u305b\u308c\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\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\">\u7b2c2\u5f15\u6570\u306econtext\u306f\u3001\u6b63\u76f4\u306a\u3068\u3053\u308d\u4f7f\u3046\u5834\u9762\u306f\u305d\u3053\u307e\u3067\u591a\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u300c\u540c\u3058\u30af\u30e9\u30b9\u540d\u306e\u8981\u7d20\u304c\u8907\u6570\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u307e\u305f\u304c\u3063\u3066\u5b58\u5728\u3059\u308b\u306e\u306b\u3001\u610f\u56f3\u3057\u306a\u3044\u65b9\u306e\u8981\u7d20\u304c\u53d6\u5f97\u3055\u308c\u3066\u3057\u307e\u3046\u300d\u3068\u3044\u3046\u4e0d\u5177\u5408\u306e\u76f8\u8ac7\u3092\u53d7\u3051\u305f\u3068\u304d\u306f\u3001\u305f\u3044\u3066\u3044\u3053\u306econtext\u3067\u691c\u7d22\u7bc4\u56f2\u3092\u7d5e\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3057\u307e\u3057\u305f\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">TABLE PATTERN<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30c6\u30fc\u30d6\u30eb\uff08tr\/td\uff09\u64cd\u4f5c\u3067\u306e\u5b9f\u8df5\u4f8b\uff1a\u300c\u3069\u306e\u884c\u306e\u30dc\u30bf\u30f3\u304b\u300d\u3092\u7279\u5b9a\u3059\u308b<\/span>\n  <span class=\"section-desc\">\u4e00\u89a7\u8868\u30fb\u6ce8\u6587\u30ea\u30b9\u30c8\u306e\u64cd\u4f5c\u3067\u6700\u3082\u983b\u51fa\u3059\u308b\u30d1\u30bf\u30fc\u30f3<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u304c\u6700\u3082\u6d3b\u8e8d\u3059\u308b\u5834\u9762\u306e\u3072\u3068\u3064\u304c\u3001<strong>\u30c6\u30fc\u30d6\u30eb\uff08\u8868\uff09\u306e\u4e2d\u306e1\u884c\u3060\u3051\u3092\u64cd\u4f5c\u3057\u305f\u3044<\/strong>\u30b1\u30fc\u30b9\u3067\u3059\u3002\u7ba1\u7406\u753b\u9762\u306e\u6ce8\u6587\u4e00\u89a7\u3001\u9867\u5ba2\u30ea\u30b9\u30c8\u3001\u5728\u5eab\u4e00\u89a7\u306a\u3069\u3001business\u5411\u3051\u30b5\u30a4\u30c8\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u753b\u9762\u3067\u306f\u307b\u307c\u5fc5\u305a\u3068\u8a00\u3063\u3066\u3044\u3044\u307b\u3069\u767b\u5834\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u30c6\u30fc\u30d6\u30eb\u306e\u5404\u884c\u306b\u524a\u9664\u30dc\u30bf\u30f3\u304c\u3042\u308b\u60f3\u5b9a\n\/\/ HTML: &lt;table&gt;&lt;tr class=&quot;order-row&quot; data-order-id=&quot;1023&quot;&gt;&lt;td&gt;...&lt;\/td&gt;\n\/\/         &lt;td&gt;&lt;button class=&quot;delete-btn&quot;&gt;\u524a\u9664&lt;\/button&gt;&lt;\/td&gt;&lt;\/tr&gt;...&lt;\/table&gt;\n\n$(&#x27;.delete-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $tr = $(this).closest(&#x27;tr&#x27;);           \/\/ \u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b&lt;tr&gt;\n    var orderId = $tr.data(&#x27;order-id&#x27;);        \/\/ \u305d\u306e\u884c\u306e\u6ce8\u6587\u756a\u53f7\n\n    if (confirm(&#x27;\u6ce8\u6587\u756a\u53f7 &#x27; + orderId + &#x27; \u3092\u524a\u9664\u3057\u307e\u3059\u304b\uff1f&#x27;)) {\n        $tr.remove();                           \/\/ \u305d\u306e\u884c\u3060\u3051\u3092\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u524a\u9664\n    }\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306b\u4f55\u5341\u884c\u3042\u3063\u3066\u3082\u3001<strong>closest('tr')\u306b\u3088\u3063\u3066\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304c\u5b9f\u969b\u306b\u5c5e\u3057\u3066\u3044\u308b\u3001\u305d\u306e1\u884c\u3060\u3051\u300d<\/strong>\u3092\u6b63\u78ba\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u30dc\u30bf\u30f3\u3054\u3068\u306b\u500b\u5225\u306e\u51e6\u7406\u3092\u66f8\u304f\u5fc5\u8981\u306f\u306a\u304f\u3001\u30c6\u30fc\u30d6\u30eb\u5168\u4f53\u306b\u5bfe\u3057\u30661\u3064\u306e\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u3060\u3051\u3067\u3001\u3069\u306e\u884c\u304c\u62bc\u3055\u308c\u3066\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5-1. \u306a\u305c\u300c\u305d\u306e\u884c\u3060\u3051\u300d\u3092\u6b63\u78ba\u306b\u53d6\u5f97\u3067\u304d\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c6\u30fc\u30d6\u30eb\u306e\u5404\u884c\uff08tr\uff09\u306f\u3001DOM\u4e0a\u3067\u306f\u305d\u308c\u305e\u308c\u72ec\u7acb\u3057\u305f\u89aa\u8981\u7d20\u3067\u3059\u3002\u524a\u9664\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001jQuery\u306f<strong>\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u81ea\u8eab\u304b\u3089\u898b\u3066\u3001\u4e00\u756a\u8fd1\u3044\uff08\u81ea\u5206\u306b\u6700\u3082\u8fd1\u3044\u968e\u5c64\u306b\u3042\u308b\uff09tr\u8981\u7d20<\/strong>\u3060\u3051\u3092\u8fd4\u3057\u307e\u3059\u3002\u4ed6\u306e\u884c\u306etr\u304c\u3069\u308c\u3060\u3051\u591a\u304f\u3042\u3063\u3066\u3082\u3001\u7121\u95a2\u4fc2\u306a\u884c\u304c\u8aa4\u3063\u3066\u9078\u3070\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\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>\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u898b\u3066\u3001\u6700\u3082\u8fd1\u3044\u968e\u5c64\u306etr\u3060\u3051\u304c\u5bfe\u8c61\u306b\u306a\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>\u884c\u306e\u4e26\u3073\u9806\u3084\u884c\u6570\u304c\u5909\u308f\u3063\u3066\u3082\u3001\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u63db\u3048\u308b\u5fc5\u8981\u304c\u306a\u3044<\/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>\u30c6\u30fc\u30d6\u30eb\u5168\u4f53\u306b1\u3064\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u3060\u3051\u3067\u3001\u5168\u884c\u306b\u5bfe\u5fdc\u3067\u304d\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>data\u5c5e\u6027\u3068\u7d44\u307f\u5408\u308f\u305b\u308c\u3070\u3001\u884c\u306b\u7d10\u3065\u304f\u56fa\u6709\u306e\u5024\uff08\u6ce8\u6587\u756a\u53f7\u30fb\u9867\u5ba2ID\u306a\u3069\uff09\u3082\u540c\u6642\u306b\u53d6\u5f97\u3067\u304d\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;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:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">td\uff08\u30bb\u30eb\u5358\u4f4d\uff09\u3067\u306f\u306a\u304ftr\uff08\u884c\u5358\u4f4d\uff09\u3067\u6307\u5b9a\u3059\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c\u524a\u9664\u30dc\u30bf\u30f3\u304c\u5165\u3063\u3066\u3044\u308b\u30bb\u30eb\u3060\u3051\u3092\u6d88\u3057\u305f\u3044\u300d\u306e\u3067\u306f\u306a\u304f\u300c\u884c\u305d\u306e\u3082\u306e\u3092\u524a\u9664\u3057\u305f\u3044\u300d\u5834\u5408\u306f\u3001closest('td')\u3067\u306f\u306a\u304fclosest('tr')\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002closest('td')\u306b\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30dc\u30bf\u30f3\u304c\u5165\u3063\u3066\u3044\u308b\u30bb\u30eb1\u3064\u3060\u3051\u304c\u5bfe\u8c61\u306b\u306a\u308a\u3001\u884c\u5168\u4f53\u306e\u524a\u9664\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u300c\u4f55\u3092\u524a\u9664\u30fb\u5909\u66f4\u3057\u305f\u3044\u306e\u304b\u300d\u3068\u3044\u3046\u5358\u4f4d\u3092\u5148\u306b\u6c7a\u3081\u3066\u304b\u3089\u3001\u30bb\u30ec\u30af\u30bf\u3092\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\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\">\u5f0a\u793e\u306e\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u306e\u76f8\u8ac7\u3067\u3082\u3001\u300c\u4e00\u89a7\u753b\u9762\u306e\u524a\u9664\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3089\u3001\u306a\u305c\u304b\u5225\u306e\u884c\u304c\u6d88\u3048\u308b\u300d\u3068\u3044\u3063\u305f\u4e0d\u5177\u5408\u306e\u76f8\u8ac7\u3092\u53d7\u3051\u305f\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u539f\u56e0\u3092\u898b\u308b\u3068\u3001\u305f\u3044\u3066\u3044\u30bb\u30ec\u30af\u30bf\u306e\u6307\u5b9a\u5358\u4f4d\uff08td\u304btr\u304b\uff09\u3092\u9593\u9055\u3048\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u3057\u305f\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">RETURN VALUE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">closest()\u306e\u623b\u308a\u5024\u3068\u6761\u4ef6\u5206\u5c90\uff08length\u30d7\u30ed\u30d1\u30c6\u30a3\u6d3b\u7528\uff09<\/span>\n  <span class=\"section-desc\">\u300c\u898b\u3064\u304b\u3063\u305f\u304b\u3069\u3046\u304b\u300d\u3092\u5224\u5b9a\u3057\u3066\u304b\u3089\u51e6\u7406\u3092\u9032\u3081\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">2\u7ae0\u3067\u89e6\u308c\u305f\u3068\u304a\u308a\u3001closest()\u306f\u6761\u4ef6\u306b\u5408\u3046\u5148\u7956\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u3051\u308c\u3070<strong>\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong>\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u306e\u300c\u898b\u3064\u304b\u3063\u305f\u304b\u3069\u3046\u304b\u300d\u3092\u78ba\u8a8d\u305b\u305a\u306b\u5f8c\u7d9a\u306e\u51e6\u7406\u3092\u66f8\u3044\u3066\u3057\u307e\u3046\u3068\u3001\u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\u3084\u30a8\u30e9\u30fc\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\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>length\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\uff1ajQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6301\u3064\u3001\u30de\u30c3\u30c1\u3057\u305f\u8981\u7d20\u306e\u4ef6\u6570\u3092\u8868\u3059\u30d7\u30ed\u30d1\u30c6\u30a3\u3002closest()\u306e\u5834\u5408\u3001\u30de\u30c3\u30c1\u3059\u308c\u30701\u3001\u30de\u30c3\u30c1\u3057\u306a\u3051\u308c\u30700\u306b\u306a\u308b\u3002if ($el.length) \u3068\u3044\u3046\u66f8\u304d\u65b9\u3067\u300c\u8981\u7d20\u304c\u898b\u3064\u304b\u3063\u305f\u304b\u3069\u3046\u304b\u300d\u3092\u5224\u5b9a\u3059\u308b\u306e\u304c\u5b9a\u756a\u306e\u30d1\u30bf\u30fc\u30f3\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u623b\u308a\u5024\u306elength\u3067\u300c\u898b\u3064\u304b\u3063\u305f\u304b\u3069\u3046\u304b\u300d\u3092\u78ba\u8a8d\u3059\u308b\n$(&#x27;.action-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $panel = $(this).closest(&#x27;.settings-panel&#x27;);\n\n    if ($panel.length) {\n        \/\/ \u30de\u30c3\u30c1\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n        $panel.addClass(&#x27;is-editing&#x27;);\n    } else {\n        \/\/ \u60f3\u5b9a\u3057\u305f\u89aa\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\n        console.warn(&#x27;settings-panel \u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f&#x27;);\n    }\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e<strong>if ($panel.length) { ... } else { ... }<\/strong>\u3068\u3044\u3046\u66f8\u304d\u65b9\u306f\u3001closest()\u3092\u4f7f\u3046\u307b\u307c\u3059\u3079\u3066\u306e\u5834\u9762\u3067\u767b\u5834\u3059\u308b\u5b9a\u756a\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u300c\u898b\u3064\u304b\u3063\u305f\u524d\u63d0\u300d\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3057\u307e\u3046\u3068\u3001HTML\u69cb\u9020\u304c\u30ea\u30cb\u30e5\u30fc\u30a2\u30eb\u306a\u3069\u3067\u5909\u308f\u3063\u305f\u969b\u306b\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u51fa\u306a\u3044\u307e\u307e\u51e6\u7406\u3060\u3051\u304c\u52d5\u304b\u306a\u304f\u306a\u308b\u3001\u3068\u3044\u3046\u6c17\u3065\u304d\u306b\u304f\u3044\u4e0d\u5177\u5408\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. \u300c\u898b\u3064\u304b\u3089\u306a\u3044\u300d\u304c\u6b63\u5e38\u306a\u5834\u5408\u3082\u3042\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u753b\u9762\u4e0a\u306e\u3059\u3079\u3066\u306e\u30dc\u30bf\u30f3\u304c\u540c\u3058\u89aa\u69cb\u9020\u3092\u6301\u3064\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u300c\u7279\u5b9a\u306e\u6761\u4ef6\u306e\u30dc\u30bf\u30f3\u3060\u3051\u3001\u3042\u308b\u30af\u30e9\u30b9\u306e\u89aa\u3092\u6301\u3064\u300d\u3068\u3044\u3046\u8a2d\u8a08\u3067\u3042\u308c\u3070\u3001<strong>closest()\u304c\u7a7a\u3092\u8fd4\u3059\u3053\u3068\u81ea\u4f53\u304c\u6b63\u5e38\u306a\u72b6\u614b<\/strong>\u3068\u3044\u3046\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u306f\u30a8\u30e9\u30fc\u6271\u3044\u306b\u305b\u305a\u3001else\u5074\u3067\u300c\u8a72\u5f53\u306a\u3057\u306e\u3068\u304d\u306e\u51e6\u7406\u300d\u3092\u7528\u610f\u3057\u3066\u304a\u304f\u306e\u304c\u9069\u5207\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;\">length\u30c1\u30a7\u30c3\u30af\u3092\u7fd2\u6163\u306b\u3059\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">closest()\u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\u3067\u306f\u3001\u53d6\u5f97\u3057\u305f\u76f4\u5f8c\u306b\u5fc5\u305aif ($el.length)\u3067\u5b58\u5728\u78ba\u8a8d\u3092\u3059\u308b\u7fd2\u6163\u3092\u3064\u3051\u308b\u3068\u3001HTML\u69cb\u9020\u306e\u5909\u66f4\u3084\u30bf\u30a4\u30d7\u30df\u30b9\u306b\u8d77\u56e0\u3059\u308b\u4e0d\u5177\u5408\u3092\u65e9\u671f\u306b\u767a\u898b\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u30c6\u30b9\u30c8\u6bb5\u968e\u3067\u306f\u3001\u308f\u3056\u3068\u6761\u4ef6\u306b\u5408\u308f\u306a\u3044\u8981\u7d20\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u307f\u3066\u3001\u610f\u56f3\u901a\u308aelse\u5074\u306e\u51e6\u7406\u304c\u52d5\u304f\u304b\u3082\u78ba\u8a8d\u3057\u3066\u304a\u304f\u3068\u5b89\u5fc3\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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;\">VS PARENT<\/span>\n  <span class=\"section-title\" style=\"display:block;\">closest()\u3068parent()\u306e\u9055\u3044\uff1a\u300c1\u6bb5\u3060\u3051\u300d\u304b\u300c\u30de\u30c3\u30c1\u3059\u308b\u307e\u3067\u4f55\u6bb5\u3067\u3082\u300d\u304b<\/span>\n  <span class=\"section-desc\">\u4f3c\u3066\u3044\u308b\u3088\u3046\u3067\u3001\u63a2\u7d22\u306e\u6df1\u3055\u304c\u307e\u3063\u305f\u304f\u9055\u3046<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">jQuery\u521d\u5b66\u8005\u304c\u6700\u3082\u6df7\u540c\u3057\u3084\u3059\u3044\u306e\u304c<strong>closest()\u3068parent()<\/strong>\u306e\u9055\u3044\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u300c\u89aa\u65b9\u5411\u3092\u63a2\u3059\u300d\u70b9\u306f\u5171\u901a\u3057\u3066\u3044\u307e\u3059\u304c\u3001<strong>\u3069\u3053\u307e\u3067\u63a2\u3057\u306b\u884c\u304f\u304b<\/strong>\u304c\u6839\u672c\u7684\u306b\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u63a2\u7d22\u306e\u7bc4\u56f2<\/th><th>\u30bb\u30ec\u30af\u30bf\u3092\u6e21\u3057\u305f\u5834\u5408\u306e\u6319\u52d5<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>parent()<\/td><td>\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u306e\u89aa\u3060\u3051<\/td><td>\u89aa\u304c\u30bb\u30ec\u30af\u30bf\u306b\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u3001\u305d\u308c\u4ee5\u4e0a\u306f\u63a2\u3055\u305a\u300c\u8a72\u5f53\u306a\u3057\u300d\u306b\u306a\u308b<\/td><\/tr>\n<tr><td>closest()<\/td><td>\u81ea\u5206\u81ea\u8eab\u3092\u542b\u3081\u3001\u7956\u5148\u3092\u4e0a\u9650\uff08document\uff09\u307e\u3067\u305f\u3069\u308b<\/td><td>\u4e00\u81f4\u3059\u308b\u307e\u3067\u4f55\u968e\u5c64\u3067\u3082\u4e0a\u3078\u63a2\u3057\u7d9a\u3051\u3001\u6700\u521d\u306b\u898b\u3064\u304b\u3063\u305f1\u3064\u3092\u8fd4\u3059<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ HTML\u69cb\u9020\u306e\u60f3\u5b9a:\n\/\/ &lt;div class=&quot;order-row&quot;&gt;\n\/\/   &lt;div class=&quot;cell-wrap&quot;&gt;\n\/\/     &lt;button class=&quot;delete-btn&quot;&gt;\u524a\u9664&lt;\/button&gt;\n\/\/   &lt;\/div&gt;\n\/\/ &lt;\/div&gt;\n\n\/\/ (A) parent() : 1\u968e\u5c64\u4e0a\u306e .cell-wrap \u3057\u304b\u898b\u306a\u3044\n$(&#x27;.delete-btn&#x27;).parent();               \/\/ \u2192 .cell-wrap \u3092\u53d6\u5f97\n$(&#x27;.delete-btn&#x27;).parent(&#x27;.order-row&#x27;);   \/\/ \u2192 1\u968e\u5c64\u4e0a\u306f.cell-wrap\u3067\u4e00\u81f4\u3057\u306a\u3044\u305f\u3081\u300c\u7a7a\u300d\n\n\/\/ (B) closest() : \u4e00\u81f4\u3059\u308b\u307e\u3067\u4f55\u968e\u5c64\u3067\u3082\u4e0a\u3078\u305f\u3069\u308b\n$(&#x27;.delete-btn&#x27;).closest(&#x27;.order-row&#x27;);  \/\/ \u2192 cell-wrap\u3092\u98db\u3073\u8d8a\u3048\u3066 .order-row \u3092\u53d6\u5f97<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u304c\u793a\u3059\u3068\u304a\u308a\u3001<strong>parent('.order-row')\u306f\u300c1\u968e\u5c64\u4e0a\u304c\u305f\u307e\u305f\u307e.order-row\u3067\u306a\u3051\u308c\u3070\u5931\u6557\u300d<\/strong>\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001<strong>closest('.order-row')\u306f\u9593\u306b\u4f55\u968e\u5c64\u306e\u8981\u7d20\u304c\u631f\u307e\u3063\u3066\u3044\u3066\u3082\u3001\u898b\u3064\u304b\u308b\u307e\u3067\u4e0a\u3078\u8fbf\u3063\u3066\u304f\u308c\u307e\u3059<\/strong>\u3002\u5b9f\u52d9\u306eHTML\u306f\u3001\u88c5\u98fe\u7528\u306ediv\u304c\u4f55\u91cd\u306b\u3082\u5165\u308c\u5b50\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u73cd\u3057\u304f\u306a\u3044\u305f\u3081\u3001\u76ee\u7684\u306e\u89aa\u3092\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u305f\u3044\u5834\u9762\u3067\u306fclosest()\u306e\u65b9\u304c\u5727\u5012\u7684\u306b\u5b89\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. \u306a\u305cparent()\u304c\u4f7f\u308f\u308c\u308b\u5834\u9762\u3082\u3042\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u5fc5\u305a\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u3092\u53d6\u5f97\u3057\u305f\u3044\u300d\u3053\u3068\u304c\u660e\u78ba\u306a\u5834\u5408\u306f\u3001closest()\u3088\u308aparent()\u306e\u65b9\u304c\u30b7\u30f3\u30d7\u30eb\u3067\u610f\u56f3\u304c\u4f1d\u308f\u308a\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u9006\u306b\u3001<strong>HTML\u69cb\u9020\u304c\u5c06\u6765\u5909\u308f\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff08\u88c5\u98fe\u7528\u306ediv\u304c\u5897\u6e1b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff09<\/strong>\u5834\u5408\u306f\u3001\u968e\u5c64\u6570\u306b\u4f9d\u5b58\u3057\u306a\u3044closest()\u306e\u65b9\u304c\u58ca\u308c\u306b\u304f\u3044\u9078\u629e\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;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:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u300c\u52d5\u304b\u306a\u3044\u300d\u306e\u539f\u56e0No.1\u306fparent()\u3068closest()\u306e\u53d6\u308a\u9055\u3048<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">jQuery\u521d\u5b66\u8005\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u6700\u3082\u591a\u304f\u898b\u304b\u3051\u308b\u4e0d\u5177\u5408\u304c\u3001\u3053\u306e2\u3064\u306e\u53d6\u308a\u9055\u3048\u3067\u3059\u3002\u300c1\u968e\u5c64\u4e0a\u3057\u304b\u898b\u3066\u3044\u306a\u3044\u306e\u306b\u30012\u968e\u5c64\u4e0a\u306e\u8981\u7d20\u3092\u671f\u5f85\u3057\u3066\u66f8\u3044\u3066\u3044\u308b\u300d\u30b1\u30fc\u30b9\u304c\u307b\u3068\u3093\u3069\u306a\u306e\u3067\u3001\u52d5\u4f5c\u3057\u306a\u3044\u5834\u5408\u306f\u307e\u305a\u30bb\u30ec\u30af\u30bf\u306e\u524d\u306b\u4ed8\u3044\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u540d\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\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\">parent()\u3068closest()\u306e\u9055\u3044\u306f\u3001jQuery\u3092\u5b66\u3076\u4eba\u304c\u6700\u521d\u306b\u3064\u307e\u305a\u304f\u4ee3\u8868\u7684\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u300c\u306a\u305c\u304b\u30af\u30e9\u30b9\u3092\u4ed8\u3051\u5916\u3057\u3067\u304d\u306a\u3044\u300d\u3068\u3044\u3046\u4e0d\u5177\u5408\u306e\u539f\u56e0\u3092\u8abf\u3079\u308b\u3068\u3001\u3053\u306e\u53d6\u308a\u9055\u3048\u304c\u7d61\u3093\u3067\u3044\u308b\u3053\u3068\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-08\"><\/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;\">08<\/span>\n  <span class=\"section-label\" style=\"display:block;\">VS FIND<\/span>\n  <span class=\"section-title\" style=\"display:block;\">closest()\u3068find()\u306e\u9055\u3044\uff1a\u300c\u4e0a\u306b\u8fbf\u308b\u300d\u304b\u300c\u4e0b\u3092\u63a2\u3059\u300d\u304b<\/span>\n  <span class=\"section-desc\">\u63a2\u3059\u65b9\u5411\u304c\u305d\u3082\u305d\u3082\u9006\u3068\u3044\u3046\u3001\u6839\u672c\u7684\u306b\u7570\u306a\u308b2\u3064\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3046\u4e00\u3064\u6df7\u540c\u3055\u308c\u3084\u3059\u3044\u306e\u304c<strong>closest()\u3068find()<\/strong>\u3067\u3059\u3002\u3053\u3061\u3089\u306f\u300c\u4f3c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u300d\u3068\u3044\u3046\u3088\u308a\u3001<strong>\u63a2\u3059\u65b9\u5411\u304c\u6b63\u53cd\u5bfe<\/strong>\u3068\u3044\u3046\u3001\u6839\u672c\u7684\u306b\u7570\u306a\u308b\u4ed5\u7d44\u307f\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>find()<\/strong>\uff1a\u6307\u5b9a\u3057\u305f\u8981\u7d20\u306e\u300c\u5185\u5074\uff08\u5b50\u30fb\u5b6b\u2026\uff09\u300d\u3092\u691c\u7d22\u3059\u308bjQuery\u306e\u30e1\u30bd\u30c3\u30c9\u3002closest()\u3068\u306f\u9006\u306b\u3001\u4e0b\u65b9\u5411\uff08\u81ea\u5206\u3088\u308a\u5185\u5074\u306e\u8981\u7d20\uff09\u3078\u63a2\u3057\u306b\u884c\u304f\u3002$('.card').find('.title')\u306a\u3089\u3001.card\u306e\u4e2d\u306b\u542b\u307e\u308c\u308b.title\u3092\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308b\u3002<\/p>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u63a2\u3059\u65b9\u5411<\/th><th>\u8d77\u70b9\u3068\u306e\u95a2\u4fc2<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>closest()<\/td><td>\u4e0a\uff08\u7956\u5148\u65b9\u5411\uff09<\/td><td>\u81ea\u5206\u81ea\u8eab\u3092\u542b\u3081\u3001\u5916\u5074\u3078\u5e83\u304c\u3063\u3066\u3044\u304f<\/td><\/tr>\n<tr><td>find()<\/td><td>\u4e0b\uff08\u5b50\u5b6b\u65b9\u5411\uff09<\/td><td>\u81ea\u5206\u306e\u5185\u5074\u306b\u3042\u308b\u8981\u7d20\u3092\u63a2\u3057\u306b\u884c\u304f<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ HTML\u69cb\u9020\u306e\u60f3\u5b9a:\n\/\/ &lt;div class=&quot;card&quot; data-id=&quot;7&quot;&gt;\n\/\/   &lt;h3 class=&quot;title&quot;&gt;\u5546\u54c1A&lt;\/h3&gt;\n\/\/   &lt;button class=&quot;detail-btn&quot;&gt;\u8a73\u7d30&lt;\/button&gt;\n\/\/ &lt;\/div&gt;\n\n\/\/ (A) find() : .card \u306e\u300c\u5185\u5074\u300d\u306b\u3042\u308b .title \u3092\u63a2\u3059\uff08\u4e0b\u65b9\u5411\uff09\nvar $title = $(&#x27;.card[data-id=&quot;7&quot;]&#x27;).find(&#x27;.title&#x27;);\n\n\/\/ (B) closest() : .detail-btn \u306e\u300c\u5916\u5074\u300d\u306b\u3042\u308b .card \u3092\u63a2\u3059\uff08\u4e0a\u65b9\u5411\uff09\n$(&#x27;.detail-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $card = $(this).closest(&#x27;.card&#x27;);   \/\/ \u30dc\u30bf\u30f3\u3092\u542b\u3080\u30ab\u30fc\u30c9\u81ea\u4f53\u3092\u53d6\u5f97\n    var itemId = $card.data(&#x27;id&#x27;);\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e2\u3064\u306f\u3001<strong>\u300c\u4eca\u3069\u3053\u306b\u3044\u3066\u3001\u3069\u3061\u3089\u306e\u65b9\u5411\u306b\u4f55\u3092\u63a2\u3057\u305f\u3044\u304b\u300d\u304c\u305d\u3082\u305d\u3082\u9055\u3046<\/strong>\u305f\u3081\u3001\u4f7f\u3044\u5206\u3051\u306b\u8ff7\u3046\u3053\u3068\u306f\u3042\u307e\u308a\u306a\u3044\u306f\u305a\u3067\u3059\u304c\u3001\u540d\u524d\u306e\u97ff\u304d\u304c\u4f3c\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u3001jQuery\u306b\u4e0d\u6163\u308c\u306a\u3046\u3061\u306f\u53d6\u308a\u9055\u3048\u308b\u30b1\u30fc\u30b9\u304c\u898b\u3089\u308c\u307e\u3059\u3002\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u5916\u5074\u306e\u201c\u307e\u3068\u307e\u308a\u201d\u3092\u77e5\u308a\u305f\u3044\u300d\u306a\u3089closest()\u3001\u300c\u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u306b\u3042\u308b\u3001\u7279\u5b9a\u306e\u90e8\u54c1\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u300d\u306a\u3089find()\u3001\u3068\u899a\u3048\u3066\u304a\u304f\u3068\u8ff7\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8-1. closest()\u3068find()\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u30b1\u30fc\u30b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u52d9\u3067\u306f\u3001<strong>closest()\u3067\u5916\u5074\u306e\u307e\u3068\u307e\u308a\u3092\u7279\u5b9a\u3057\u305f\u3042\u3068\u3001\u305d\u306e\u307e\u3068\u307e\u308a\u306e\u4e2d\u306b\u3042\u308bfind()\u3067\u7279\u5b9a\u306e\u90e8\u54c1\u3092\u63a2\u3059<\/strong>\u3068\u3044\u3046\u7d44\u307f\u5408\u308f\u305b\u3082\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u524a\u9664\u30dc\u30bf\u30f3\u304c\u62bc\u3055\u308c\u305f\u884c\u306e\u4e2d\u304b\u3089\u3001\u3055\u3089\u306b\u300c\u6570\u91cf\u300d\u6b04\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u4f8b\n$(&#x27;.delete-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $row = $(this).closest(&#x27;.order-row&#x27;);   \/\/ (\u4e0a\u3078) \u884c\u5168\u4f53\u3092\u7279\u5b9a\n    var qty = $row.find(&#x27;.qty-input&#x27;).val();     \/\/ (\u4e0b\u3078) \u884c\u306e\u4e2d\u306e\u6570\u91cf\u6b04\u3092\u53d6\u5f97\n\n    console.log(&#x27;\u524a\u9664\u3055\u308c\u308b\u6570\u91cf: &#x27; + qty);\n});<\/pre>\n<\/div>\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\u307e\u305a\u4e0a\u3001\u305d\u306e\u3042\u3068\u4e0b\u300d\u3068\u3044\u3046\u9806\u756a\u3067\u8003\u3048\u308b\u3068\u30df\u30b9\u304c\u6e1b\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u8907\u96d1\u306a\u64cd\u4f5c\u307b\u3069\u3001\u3044\u304d\u306a\u308a\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u3088\u3046\u3068\u305b\u305a\u3001\u300c\u307e\u305aclosest()\u3067\u5bfe\u8c61\u306e\u307e\u3068\u307e\u308a\u3092\u7279\u5b9a\u3059\u308b\u300d\u2192\u300c\u305d\u306e\u3042\u3068find()\u3067\u5fc5\u8981\u306a\u90e8\u54c1\u3092\u53d6\u308a\u51fa\u3059\u300d\u3068\u3044\u30462\u6bb5\u968e\u306b\u5206\u3051\u3066\u8003\u3048\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u898b\u901a\u3057\u304c\u826f\u304f\u306a\u308a\u3001\u610f\u56f3\u3057\u306a\u3044\u8981\u7d20\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3046\u30df\u30b9\u3082\u6e1b\u3089\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a,#2a2015);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:#f59e0b;font-weight:700;letter-spacing:1px;\">VERDICT<\/div>\n    <div style=\"font-size:18px;font-weight:800;\">\u4f7f\u3044\u5206\u3051\u304c\u6b63\u89e3<\/div>\n    <div style=\"font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px;\">closest()\u3068find()\u306f\u512a\u52a3\u306e\u8a71\u3067\u306f\u306a\u304f\u65b9\u5411\u306e\u9055\u3044\u3002\u300c\u5916\u5074\u306e\u307e\u3068\u307e\u308a\u3092\u77e5\u308a\u305f\u3044\u300d\u304b\u300c\u5185\u5074\u306e\u90e8\u54c1\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u300d\u304b\u3067\u6a5f\u68b0\u7684\u306b\u6c7a\u307e\u308b\u3002<\/div>\n  <\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-09\"><\/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;\">09<\/span>\n  <span class=\"section-label\" style=\"display:block;\">PRACTICAL PATTERNS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u696d\u52d9Web\u30b5\u30a4\u30c8\u3067\u3088\u304f\u3042\u308b\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3\u96c6<\/span>\n  <span class=\"section-desc\">\u30d5\u30a9\u30fc\u30e0\u884c\u524a\u9664\u30fb\u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3\u30fb\u4e00\u89a7\u64cd\u4f5c\u3078\u306e\u5fdc\u7528\u4f8b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u7d39\u4ecb\u3057\u305f\u4f7f\u3044\u65b9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u696d\u52d9\u30b5\u30a4\u30c8\u3067\u3088\u304f\u3042\u308b\u753b\u9762\u64cd\u4f5c\u306e\u591a\u304f\u3092closest()\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9-1. \u30d5\u30a9\u30fc\u30e0\u306e\u300c\u884c\u3092\u8ffd\u52a0\u30fb\u524a\u9664\u3067\u304d\u308b\u300d\u5165\u529b\u6b04<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u898b\u7a4d\u66f8\u30d5\u30a9\u30fc\u30e0\u306a\u3069\u3067\u3001\u884c\u3054\u3068\u306b\u8ffd\u52a0\u30fb\u524a\u9664\u30dc\u30bf\u30f3\u304c\u3042\u308b\u60f3\u5b9a\n$(document).on(&#x27;click&#x27;, &#x27;.remove-line&#x27;, function () {\n    $(this).closest(&#x27;.line-item&#x27;).remove();   \/\/ \u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5165\u529b\u884c\u3060\u3051\u524a\u9664\n});\n\n$(&#x27;.add-line&#x27;).on(&#x27;click&#x27;, function () {\n    var $template = $(&#x27;.line-item&#x27;).first().clone();\n    $template.find(&#x27;input&#x27;).val(&#x27;&#x27;);           \/\/ \u8907\u88fd\u3057\u305f\u884c\u306e\u5165\u529b\u5024\u3092\u30af\u30ea\u30a2\n    $(&#x27;.line-item&#x27;).last().after($template);\n});<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">9-2. \u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3\uff08\u30af\u30ea\u30c3\u30af\u3057\u305f\u9805\u76ee\u3060\u3051\u958b\u9589\u3059\u308b\uff09<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u30af\u30ea\u30c3\u30af\u3057\u305f\u898b\u51fa\u3057\u306b\u5bfe\u5fdc\u3059\u308b\u672c\u6587\u3060\u3051\u3092\u958b\u9589\u3059\u308b\n$(&#x27;.accordion-head&#x27;).on(&#x27;click&#x27;, function () {\n    var $item = $(this).closest(&#x27;.accordion-item&#x27;);\n    $item.toggleClass(&#x27;is-open&#x27;);\n    $item.find(&#x27;.accordion-body&#x27;).slideToggle();\n});<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">9-3. \u4e00\u89a7\u306e\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u304b\u3089\u300c\u9078\u629e\u3055\u308c\u305f\u884c\u300d\u3092\u96c6\u3081\u308b<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ \u30c1\u30a7\u30c3\u30af\u304c\u5165\u3063\u3066\u3044\u308b\u884c\u306e\u6ce8\u6587\u756a\u53f7\u3060\u3051\u3092\u96c6\u3081\u308b\nfunction getSelectedOrderIds() {\n    var ids = [];\n    $(&#x27;.row-checkbox:checked&#x27;).each(function () {\n        var orderId = $(this).closest(&#x27;tr&#x27;).data(&#x27;order-id&#x27;);\n        ids.push(orderId);\n    });\n    return ids;\n}<\/pre>\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>\u30d5\u30a9\u30fc\u30e0\u884c\u306e\u8ffd\u52a0\u30fb\u524a\u9664\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u305d\u306e\u5165\u529b\u884c\u3060\u3051\u3092\u7279\u5b9a\u3059\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>\u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3\u958b\u9589\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u898b\u51fa\u3057\u306b\u5bfe\u5fdc\u3059\u308b\u672c\u6587\u3060\u3051\u3092\u958b\u9589\u3059\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>\u30c6\u30fc\u30d6\u30eb\u306e\u4e00\u62ec\u9078\u629e\u51e6\u7406\uff1a\u30c1\u30a7\u30c3\u30af\u304c\u5165\u3063\u3066\u3044\u308b\u884c\u3060\u3051\u3092\u96c6\u3081\u3066\u51e6\u7406\u3059\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>\u30bf\u30d6\u5207\u308a\u66ff\u3048\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30bf\u30d6\u306b\u5bfe\u5fdc\u3059\u308b\u30d1\u30cd\u30eb\u3060\u3051\u3092\u8868\u793a\u3059\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>\u30e2\u30fc\u30c0\u30eb\uff08\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\uff09\u306e\u9589\u3058\u308b\u30dc\u30bf\u30f3\uff1a\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u30e2\u30fc\u30c0\u30eb\u81ea\u4f53\u3092\u7279\u5b9a\u3057\u3066\u9589\u3058\u308b<\/span><\/div>\n\n<\/div>\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\">\u3053\u3046\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u306f\u30011\u3064\u3072\u3068\u3064\u306e\u52d5\u304d\u81ea\u4f53\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3082\u3001\u300c\u3069\u306e\u30bb\u30ec\u30af\u30bf\u3067\u3001\u3069\u306e\u968e\u5c64\u307e\u3067\u8fbf\u308b\u304b\u300d\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u3068\u304d\u306b\u3069\u3046\u632f\u308b\u821e\u308f\u305b\u308b\u304b\u300d\u3068\u3044\u3063\u305f\u3001\u3053\u306e\u8a18\u4e8b\u3067\u89e6\u308c\u3066\u304d\u305f\u6ce8\u610f\u70b9\u304c\u3059\u3079\u3066\u7d61\u3093\u3067\u304d\u307e\u3059\u3002\u30bc\u30ed\u304b\u3089\u66f8\u304d\u8d77\u3053\u3059\u3068\u3001\u5730\u5473\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u9818\u57df\u3067\u3059\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-10\"><\/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;\">10<\/span>\n  <span class=\"section-label\" style=\"display:block;\">GENAI CASE DATA<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u30c7\u30fc\u30bf\u3011GENAI\u5b9f\u904b\u7528\u306b\u304a\u3051\u308b\u30b5\u30a4\u30c8\u4fee\u6b63\u30fb\u78ba\u8a8d\u696d\u52d9\u306e\u5b9f\u614b<\/span>\n  <span class=\"section-desc\">\u300c\u3053\u306e\u30dc\u30bf\u30f3\u306e\u6319\u52d5\u3092\u76f4\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u4f9d\u983c\u306b\u3001\u3069\u308c\u3060\u3051\u306e\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3044\u305f\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u306f\u3001\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u304c\u5b9f\u969b\u306b\u3069\u306e\u7a0b\u5ea6\u306e\u696d\u52d9\u6642\u9593\u3092\u300cWeb\u30b5\u30a4\u30c8\u306e\u7d30\u304b\u306a\u6319\u52d5\u4fee\u6b63\u30fb\u78ba\u8a8d\u696d\u52d9\u300d\u306b\u8cbb\u3084\u3057\u3066\u3044\u305f\u304b\u3001\u793e\u5185\u306e\u5b9f\u904b\u7528\u30c7\u30fc\u30bf\u3092\u3082\u3068\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002closest()\u306e\u3088\u3046\u306aDOM\u64cd\u4f5c\u305d\u306e\u3082\u306e\u306e\u69cb\u6587\u3088\u308a\u3082\u3001<strong>\u300c\u3069\u306e\u8981\u7d20\u3092\u3001\u3069\u306e\u7bc4\u56f2\u307e\u3067\u8fbf\u3089\u305b\u308c\u3070\u610f\u56f3\u901a\u308a\u306e\u52d5\u304d\u306b\u306a\u308b\u304b\u300d\u3092\u8a2d\u8a08\u30fb\u78ba\u8a8d\u3059\u308b\u6642\u9593<\/strong>\u304c\u3001\u898b\u3048\u306b\u304f\u3044\u30b3\u30b9\u30c8\u306b\u306a\u3063\u3066\u3044\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u9805\u76ee<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u5229\u7528\u30d7\u30e9\u30f3<\/td><td>Claude Max 20x\uff08\u6708\u984d$200\uff0f\u7d0430,000\u5186\uff09<\/td><\/tr>\n<tr><td>\u5229\u7528\u958b\u59cb<\/td><td>2025\u5e74\u5f8c\u534a\u301c<\/td><\/tr>\n<tr><td>\u9069\u7528\u7bc4\u56f2<\/td><td>\u7d4c\u55b6\u30fb\u55b6\u696d\u30fb\u5e83\u544a\u30fb\u958b\u767a\u30fb\u7d4c\u7406\u30fb\u79d8\u66f8\u696d\u52d9\u30fb\u500b\u4eba\u696d\u52d9\u307e\u3067\u5168\u793e<\/td><\/tr>\n<tr><td>\u30b5\u30a4\u30c8\u4fee\u6b63\u95a2\u9023\u306e\u4e3b\u306a\u7528\u9014<\/td><td>LP\u306e\u30dc\u30bf\u30f3\u6319\u52d5\u4fee\u6b63\u30fb\u30d5\u30a9\u30fc\u30e0\u884c\u306e\u8ffd\u52a0\u524a\u9664\u6a5f\u80fd\u30fb\u7ba1\u7406\u753b\u9762\u306e\u4e00\u89a7\u64cd\u4f5c\u6539\u5584<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\u306e\u5e83\u544a\u30fbLP\u904b\u7528\u696d\u52d9\u3067\u306f\u3001<strong>\u300c\u3053\u306e\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3068\u304d\u306e\u52d5\u304d\u3092\u5c11\u3057\u5909\u3048\u305f\u3044\u300d\u300c\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u306e\u3001\u3053\u306e\u884c\u3060\u3051\u524a\u9664\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u300d<\/strong>\u3068\u3044\u3063\u305f\u7d30\u304b\u306a\u4fee\u6b63\u4f9d\u983c\u304c\u5b9a\u5e38\u7684\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u4ee5\u524d\u306f\u3053\u3046\u3057\u305f\u4fee\u6b63\u306e\u305f\u3073\u306b\u3001\u8a72\u5f53\u3059\u308b\u753b\u9762\u306eHTML\u69cb\u9020\u3092\u78ba\u8a8d\u3057\u3001\u52d5\u4f5c\u78ba\u8a8d\u30fb\u5fae\u8abf\u6574\u3092\u7e70\u308a\u8fd4\u3059\u5f62\u3067\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u696d\u52d9\u9818\u57df<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><th>\u6982\u7b97\u524a\u6e1b\u6642\u9593\uff08\u808c\u611f\u30d9\u30fc\u30b9\uff09<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u958b\u767a\uff08LP\/\u30d5\u30a9\u30fc\u30e0\u4fee\u6b63\uff09<\/td><td>\u30dc\u30bf\u30f3\u6319\u52d5\u4fee\u6b63\u30fb\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u6539\u5584\u30fb\u30b9\u30af\u30ea\u30d7\u30c8\u66f8\u304d\u6368\u3066<\/td><td>\u90fd\u5ea6\u6570\u6642\u9593\u524a\u6e1b<\/td><\/tr>\n<tr><td>\u5e83\u544a\u904b\u7528<\/td><td>\u9031\u6b21\u30ec\u30dd\u30fc\u30c8\u30fbCPA\u5206\u6790\u30fb\u914d\u4fe1\u5185\u5bb9\u8abf\u6574<\/td><td>\u903110h \u2192 \u90311h<\/td><\/tr>\n<tr><td>\u79d8\u66f8\u696d\u52d9<\/td><td>\u65e5\u5831\u751f\u6210\u30fb\u8b70\u4e8b\u9332\u30fb\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u8abf\u6574<\/td><td>\u65e52h \u2192 \u65e515\u5206<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;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:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u6570\u5024\u306e\u6ce8\u610f\u66f8\u304d<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u4e0a\u8a18\u306f\u5f0a\u793e\u306e\u808c\u611f\u30d9\u30fc\u30b9\u306e\u6570\u5024\u3067\u3042\u308a\u3001\u696d\u7a2e\u30fb\u696d\u614b\u30fb\u62c5\u5f53\u8005\u306e\u30b9\u30ad\u30eb\u306b\u3088\u3063\u3066\u524a\u6e1b\u6642\u9593\u306f\u5909\u52d5\u3057\u307e\u3059\u3002\u300c\u5b8c\u5168\u81ea\u52d5\u5316\u300d\u3067\u306f\u306a\u304f\u3001\u4eba\u9593\u306e\u30ec\u30d3\u30e5\u30fc\u30fb\u5fae\u8abf\u6574\u3092\u4f34\u3046\u904b\u7528\u3067\u3042\u308b\u70b9\u306b\u3082\u3054\u7559\u610f\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306bLP\u30fb\u30d5\u30a9\u30fc\u30e0\u95a2\u9023\u306e\u4fee\u6b63\u306f\u3001\u672c\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f<strong>\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u8981\u7d20\u304b\u3089\u3069\u306e\u7bc4\u56f2\u3092\u5bfe\u8c61\u306b\u3059\u308b\u304b\u300d\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u3068\u304d\u306b\u3069\u3046\u632f\u308b\u821e\u308f\u305b\u308b\u304b\u300d<\/strong>\u304c\u305d\u306e\u307e\u307e\u6d3b\u304d\u308b\u9818\u57df\u3067\u3059\u3002\u305f\u3060\u3057\u5b9f\u52d9\u3067\u306f\u3001<strong>\u300c\u4eca\u56de\u306eHTML\u69cb\u9020\u306b\u306f\u3069\u306e\u30bb\u30ec\u30af\u30bf\u30fb\u3069\u306e\u691c\u7d22\u65b9\u5411\u3092\u4f7f\u3046\u3079\u304d\u304b\u300d\u3092\u90fd\u5ea6\u78ba\u8a8d\u3059\u308b\u4f5c\u696d<\/strong>\u304c\u3001\u3053\u308c\u307e\u3067\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3067\u3057\u305f\u3002<\/p>\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\">closest()\u3084parent()\u306e\u69cb\u6587\u81ea\u4f53\u306f\u899a\u3048\u308c\u3070\u66f8\u3051\u307e\u3059\u304c\u3001\u300c\u5b9f\u969b\u306eHTML\u69cb\u9020\u306b\u5bfe\u3057\u3066\u3069\u306e\u30bb\u30ec\u30af\u30bf\u3092\u4f7f\u3048\u3070\u610f\u56f3\u901a\u308a\u52d5\u304f\u304b\u300d\u3068\u3044\u3046\u78ba\u8a8d\u4f5c\u696d\u306f\u3001\u7d4c\u9a13\u304c\u306a\u3044\u3068\u5730\u5473\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u5f0a\u793e\u3067\u306f\u3001\u3053\u306e\u78ba\u8a8d\u4f5c\u696d\u306e\u90e8\u5206\u3082Claude Code\u306b\u76f8\u8ac7\u3057\u306a\u304c\u3089\u9032\u3081\u308b\u3053\u3068\u3067\u3001\u62c5\u5f53\u8005\u304c\u672c\u6765\u306e\u696d\u52d9\u5224\u65ad\u306b\u96c6\u4e2d\u3067\u304d\u308b\u6642\u9593\u3092\u5897\u3084\u3057\u3066\u3044\u307e\u3059\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-11\"><\/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;\">11<\/span>\n  <span class=\"section-label\" style=\"display:block;\">COMMON PITFALLS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u3011\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u304cDOM\u64cd\u4f5c\u3067\u3064\u307e\u305a\u304f3\u3064\u306e\u7f60<\/span>\n  <span class=\"section-desc\">\u3064\u307e\u305a\u304d\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3068\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u306f\u69cb\u6587\u81ea\u4f53\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u304c\u72ec\u5b66\u3084AI\u3068\u306e\u5354\u696d\u3067DOM\u64cd\u4f5c\uff08\u89aa\u8981\u7d20\u306e\u53d6\u5f97\uff09\u3092\u6271\u3044\u59cb\u3081\u308b\u3068\u3001\u5171\u901a\u3057\u3066\u3064\u307e\u305a\u304f\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u4ee3\u8868\u7684\u306a3\u3064\u306e\u7f60\u3068\u3001\u305d\u306e\u56de\u907f\u65b9\u6cd5\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">11-1. \u7f601\uff1aparent()\u3068closest()\u3092\u53d6\u308a\u9055\u3048\u3066\u30011\u968e\u5c64\u3057\u304b\u898b\u3066\u3044\u306a\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">7\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u3068\u304a\u308a\u3001<strong>parent()\u306f\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u3057\u304b\u898b\u307e\u305b\u3093<\/strong>\u3002\u88c5\u98fe\u7528\u306ediv\u304c\u9593\u306b\u631f\u307e\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u300c\u898b\u3064\u304b\u3089\u306a\u3044\u300d\u6271\u3044\u306b\u306a\u308b\u305f\u3081\u3001\u60f3\u5b9a\u3057\u305f\u89aa\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u4e0d\u5177\u5408\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">11-2. \u7f602\uff1aclosest()\u3068find()\u3067\u3001\u63a2\u3059\u65b9\u5411\u3092\u9006\u306b\u899a\u3048\u3066\u3057\u307e\u3046<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">8\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u3068\u304a\u308a\u3001<strong>closest()\u306f\u4e0a\uff08\u5916\u5074\uff09\u3001find()\u306f\u4e0b\uff08\u5185\u5074\uff09<\/strong>\u3068\u3044\u3046\u3001\u63a2\u3059\u65b9\u5411\u304c\u305d\u3082\u305d\u3082\u9006\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u306e\u5185\u5074\u304b\u3089\u89aa\u8981\u7d20\u3092\u63a2\u305d\u3046\u3068\u3057\u3066find()\u3092\u4f7f\u3063\u3066\u3057\u307e\u3046\u300d\u3068\u3044\u3063\u305f\u53d6\u308a\u9055\u3048\u306f\u3001\u898b\u305f\u76ee\u306e\u30a8\u30e9\u30fc\u304c\u51fa\u306a\u3044\u305f\u3081\u6c17\u3065\u304d\u306b\u304f\u3044\u5178\u578b\u7684\u306a\u4e8b\u6545\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">11-3. \u7f603\uff1a\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u300d\u306e\u51e6\u7406\u3092\u7528\u610f\u3057\u3066\u3044\u306a\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">6\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u3068\u304a\u308a\u3001closest()\u306f<strong>\u30de\u30c3\u30c1\u3057\u306a\u3051\u308c\u3070\u7a7a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3060\u3051\u3067\u3001\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093<\/strong>\u3002length\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u5b58\u5728\u78ba\u8a8d\u3092\u3057\u306a\u3044\u307e\u307e\u5f8c\u7d9a\u306e\u51e6\u7406\u3092\u66f8\u304f\u3068\u3001\u300c\u306a\u305c\u304b\u4f55\u3082\u8d77\u304d\u306a\u3044\u300d\u72b6\u614b\u306b\u306a\u308a\u3001\u539f\u56e0\u306e\u7279\u5b9a\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>parent()\u3068<br>closest()\u3092<br>\u53d6\u308a\u9055\u3048\u3066\u3044\u306a\u3044\u304b<\/strong><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u4e0a\u306b\u8fbf\u308b\u304b\u4e0b\u306b<br>\u8fbf\u308b\u304b\u3001\u65b9\u5411\u306f<br>\u5408\u3063\u3066\u3044\u308b\u304b<\/strong><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f<br>\u3068\u304d\u306e\u51e6\u7406\u3092<br>\u7528\u610f\u3057\u3066\u3044\u308b\u304b<\/strong><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5b9f\u969b\u306eHTML\u3067<br>console.log<br>\u78ba\u8a8d<\/strong><\/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>\u30e1\u30bd\u30c3\u30c9\u306e\u9078\u629e\uff1a\u76f4\u8fd11\u968e\u5c64\u3067\u5341\u5206\u306a\u3089parent()\u3001\u968e\u5c64\u6570\u304c\u4e0d\u5b9a\u306a\u3089closest()\u3092\u4f7f\u3063\u3066\u3044\u308b\u304b<\/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>\u63a2\u7d22\u65b9\u5411\uff1a\u4e0a\uff08\u5916\u5074\uff09\u3092\u63a2\u3057\u305f\u3044\u306e\u304b\u4e0b\uff08\u5185\u5074\uff09\u3092\u63a2\u3057\u305f\u3044\u306e\u304b\u3092\u53d6\u308a\u9055\u3048\u3066\u3044\u306a\u3044\u304b<\/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>\u5b58\u5728\u78ba\u8a8d\uff1aclosest()\u306e\u623b\u308a\u5024\u3092length\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u78ba\u8a8d\u3057\u3066\u304b\u3089\u5f8c\u7d9a\u51e6\u7406\u3092\u66f8\u3044\u3066\u3044\u308b\u304b<\/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>\u30bb\u30ec\u30af\u30bf\u306e\u4e00\u81f4\uff1aHTML\u5074\u306e\u30af\u30e9\u30b9\u540d\u30fbid\u540d\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027\u540d\u3068\u3001\u30b3\u30fc\u30c9\u5074\u306e\u6307\u5b9a\u304c\u5b8c\u5168\u306b\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b<\/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>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\uff1a\u30af\u30ea\u30c3\u30af\u5bfe\u8c61\u306e\u8981\u7d20\u30fb\u898b\u3064\u304b\u3089\u306a\u3044\u306f\u305a\u306e\u8981\u7d20\u306e\u4e21\u65b9\u3067\u52d5\u4f5c\u78ba\u8a8d\u3092\u3057\u305f\u304b<\/span><\/div>\n\n<\/div>\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\">\u3053\u306e3\u3064\u306e\u7f60\u306f\u3001\u5f0a\u793e\u306e\u5c0e\u5165\u652f\u63f4\u5148\u3067\u3082\u672c\u5f53\u306b\u3088\u304f\u898b\u304b\u3051\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u300c\u30bb\u30ec\u30af\u30bf\u81ea\u4f53\u306f\u6b63\u3057\u3044\u306e\u306b\u3001\u63a2\u3059\u65b9\u5411\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u9078\u3073\u65b9\u306e\u629c\u3051\u3067\u610f\u56f3\u3068\u9055\u3046\u52d5\u304d\u3092\u3059\u308b\u300d\u3068\u3044\u3046\u306e\u306f\u3001\u7d4c\u9a13\u3092\u7a4d\u3080\u307e\u3067\u306f\u907f\u3051\u306b\u304f\u3044\u30df\u30b9\u306a\u306e\u3067\u3001\u5b9f\u969b\u306eHTML\u3067\u52d5\u4f5c\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-12\"><\/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;\">12<\/span>\n  <span class=\"section-label\" style=\"display:block;\">WITH CLAUDE CODE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u69cb\u6587\u3092\u899a\u3048\u306a\u304f\u3066\u3082\u3001\u76f4\u3057\u305f\u3044\u52d5\u304d\u3092\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308c\u3070Claude Code\u304c\u5b9f\u88c5\u3059\u308b<\/span>\n  <span class=\"section-desc\">closest\/parent\/find...\u4e00\u3064\u3072\u3068\u3064\u6697\u8a18\u3057\u306a\u304f\u3066\u3082\u3001\u76ee\u7684\u3055\u3048\u8a00\u3048\u308c\u3070\u5b9f\u88c5\u3055\u308c\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u898b\u3066\u304d\u305f\u3068\u304a\u308a\u3001closest()\u81ea\u4f53\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3082\u3001<strong>parent()\u3068\u306e\u63a2\u7d22\u7bc4\u56f2\u306e\u9055\u3044\u30fbfind()\u3068\u306e\u65b9\u5411\u306e\u9055\u3044\u30fb\u623b\u308a\u5024\u304clength=0\u306b\u306a\u308b\u30b1\u30fc\u30b9\u306e\u6271\u3044<\/strong>\u306a\u3069\u3001\u6b63\u3057\u304f\u52d5\u304f\u89aa\u8981\u7d20\u306e\u53d6\u5f97\u51e6\u7406\u3092\u66f8\u304f\u306b\u306f\u6c17\u3092\u3064\u3051\u308b\u3079\u304d\u70b9\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u300211\u7ae0\u3067\u6319\u3052\u305f\u3088\u3046\u306a\u300c\u30e1\u30bd\u30c3\u30c9\u306e\u53d6\u308a\u9055\u3048\u300d\u300c\u63a2\u7d22\u65b9\u5411\u306e\u8aa4\u308a\u300d\u300c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\u6f0f\u308c\u300d\u3068\u3044\u3063\u305f\u843d\u3068\u3057\u7a74\u3092\u8e0f\u307e\u305a\u306b\u3001\u6bce\u56de\u6b63\u3057\u3044DOM\u64cd\u4f5c\u3092\u7d44\u307f\u7acb\u3066\u308b\u306e\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u6163\u308c\u3066\u3044\u306a\u3044\u4eba\u307b\u3069\u30cf\u30fc\u30c9\u30eb\u304c\u9ad8\u3044\u306e\u304c\u5b9f\u60c5\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u300c\u5b9f\u73fe\u3057\u305f\u3044\u753b\u9762\u306e\u52d5\u304d\u3092\u6574\u7406\u3057\u3001\u5bfe\u8c61\u8981\u7d20\u306e\u7d5e\u308a\u8fbc\u307f\u65b9\u6cd5\u3092\u6b63\u3057\u304f\u8a2d\u8a08\u3057\u3001\u30b3\u30fc\u30c9\u306b\u843d\u3068\u3057\u8fbc\u307f\u3001\u5b9f\u969b\u306eHTML\u3067\u52d5\u4f5c\u78ba\u8a8d\u3059\u308b\u300d\u3068\u3044\u3046\u4e00\u9023\u306e\u4f5c\u696d\u306f\u3001<strong>Claude Code\u306e\u3088\u3046\u306a\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u578bAI\u30c4\u30fc\u30eb\u306b\u65e5\u672c\u8a9e\u3067\u305d\u306e\u307e\u307e\u4f9d\u983c\u3067\u304d\u308b<\/strong>\u9818\u57df\u3067\u3059\u3002closest\u30fbparent\u30fbfind\u30fbselector\u3068\u3044\u3063\u305f\u7528\u8a9e\u3084\u69cb\u6587\u3092\u6697\u8a18\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u3001\u300c\u3053\u306e\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3089\u3001\u3053\u306e\u201c\u307e\u3068\u307e\u308a\u201d\u3092\u3053\u3046\u52d5\u304b\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u8981\u4ef6\u3092\u305d\u306e\u307e\u307e\u4f1d\u3048\u308b\u3060\u3051\u3067\u3001\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u3069\u3046\u7d44\u307f\u5408\u308f\u305b\u308b\u304b\u307e\u3067\u542b\u3081\u3066\u9069\u5207\u306a\u5b9f\u88c5\u3092\u63d0\u6848\u3057\u3066\u3082\u3089\u3048\u307e\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>Claude Code<\/strong>\uff1aAnthropic\u793e\u304c\u63d0\u4f9b\u3059\u308bAI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u30c4\u30fc\u30eb\u3002\u30c1\u30e3\u30c3\u30c8\u5f62\u5f0f\u3067\u300c\u3007\u3007\u3092\u3084\u3063\u3066\u300d\u3068\u6307\u793a\u3059\u308b\u3060\u3051\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u8aad\u307f\u53d6\u308a\u3001\u30b3\u30fc\u30c9\u306e\u4f5c\u6210\u30fb\u4fee\u6b63\u30fb\u5b9f\u884c\u307e\u3067\u3092\u81ea\u5f8b\u7684\u306b\u884c\u3046\u3002\u30bf\u30fc\u30df\u30ca\u30eb\u7248\u3060\u3051\u3067\u306a\u304f\u3001\u30bf\u30fc\u30df\u30ca\u30eb\u64cd\u4f5c\u304c\u4e0d\u8981\u306a\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u7248\u3082\u63d0\u4f9b\u3055\u308c\u3066\u304a\u308a\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3060\u3051\u3067\u696d\u52d9\u3092\u4efb\u305b\u3089\u308c\u308b\u3002closest()\u306e\u69cb\u6587\u3084parent()\u30fbfind()\u3068\u306e\u4f7f\u3044\u5206\u3051\u3092\u6697\u8a18\u3057\u3066\u3044\u306a\u304f\u3066\u3082\u3001\u76ee\u7684\u3092\u4f1d\u3048\u308b\u3060\u3051\u3067\u6b63\u3057\u3044\u30b3\u30fc\u30c9\u304c\u5f97\u3089\u308c\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;color:#d4d4d4;white-space:pre-wrap;\">\/\/ Claude Code\u3078\u306e\u4f9d\u983c\u30a4\u30e1\u30fc\u30b8\uff08\u5b9f\u969b\u306f\u30c1\u30e3\u30c3\u30c8\u3067\u65e5\u672c\u8a9e\u306e\u307e\u307e\u6307\u793a\u3059\u308b\u3060\u3051\uff09\n\/\/ \u4f9d\u983c\u4f8b\uff1a\n\/\/ \u300c\u6ce8\u6587\u4e00\u89a7\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u3001\u5404\u884c\u306b\u524a\u9664\u30dc\u30bf\u30f3\u3092\u4ed8\u3051\u305f\u3044\u3002\n\/\/   \u524a\u9664\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3089\u3001\u305d\u306e\u884c\u3060\u3051\u78ba\u8a8d\u30c0\u30a4\u30a2\u30ed\u30b0\u3092\u51fa\u3057\u3066\u3001\n\/\/   OK\u306a\u3089\u884c\u3092\u6d88\u3059\u51e6\u7406\u3092\u4f5c\u3063\u3066\u300d\n\n\/\/ Claude Code\u304c\u751f\u6210\u3059\u308b\u30b3\u30fc\u30c9\u4f8b\n$(&#x27;.delete-btn&#x27;).on(&#x27;click&#x27;, function () {\n    var $row = $(this).closest(&#x27;tr&#x27;);\n    var orderId = $row.data(&#x27;order-id&#x27;);\n\n    if (confirm(&#x27;\u6ce8\u6587\u756a\u53f7 &#x27; + orderId + &#x27; \u3092\u524a\u9664\u3057\u307e\u3059\u304b\uff1f&#x27;)) {\n        $row.remove();\n    }\n});<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f9d\u983c\u306e\u4e2d\u3067\u3001\u300c\u884c\u5168\u4f53\u3092\u5bfe\u8c61\u306b\u3059\u3079\u304d\u304b\u3001\u30bb\u30eb\u3060\u3051\u3092\u5bfe\u8c61\u306b\u3059\u3079\u304d\u304b\u300d\u300c\u524a\u9664\u524d\u306b\u78ba\u8a8d\u30c0\u30a4\u30a2\u30ed\u30b0\u3092\u631f\u3080\u3079\u304d\u304b\u300d\u300c\u6ce8\u6587\u756a\u53f7\u3092\u3069\u3053\u304b\u3089\u8aad\u307f\u53d6\u308b\u304b\u300d\u3068\u3044\u3063\u305f\u3001<strong>\u3053\u306e\u8a18\u4e8b\u3067\u8aac\u660e\u3057\u3066\u304d\u305f\u5224\u65ad\u304c\u3059\u3079\u3066\u81ea\u52d5\u7684\u306b\u53cd\u6620\u3055\u308c\u3066\u3044\u308b<\/strong>\u70b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002closest\u30fbparent\u30fbfind\u30fblength\u306e\u610f\u5473\u3092\u4e00\u3064\u3072\u3068\u3064\u899a\u3048\u3066\u3044\u306a\u304f\u3066\u3082\u3001\u76ee\u7684\u3055\u3048\u8a00\u8a9e\u5316\u3067\u304d\u308c\u3070\u6b63\u3057\u3044\u5b9f\u88c5\u306b\u305f\u3069\u308a\u7740\u3051\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;\">\u4f9d\u983c\u3059\u308b\u3068\u304d\u306f\u300c\u4eca\u306eHTML\u306e\u69cb\u9020\u300d\u3082\u4e00\u7dd2\u306b\u898b\u305b\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">closest()\u306b\u4f55\u3092\u6e21\u3059\u3079\u304d\u304b\u306f\u3001\u5b9f\u969b\u306eHTML\u69cb\u9020\u6b21\u7b2c\u3067\u5909\u308f\u308a\u307e\u3059\u3002\u300c\u3053\u306e\u30da\u30fc\u30b8\u306e\u3053\u306e\u90e8\u5206\u3092\u76f4\u3057\u305f\u3044\u300d\u3068\u4f1d\u3048\u308b\u3068\u304d\u306f\u3001\u8a72\u5f53\u3059\u308b\u753b\u9762\u3084\u30b3\u30fc\u30c9\u306e\u30d5\u30a1\u30a4\u30eb\u3082\u4e00\u7dd2\u306b\u898b\u3066\u3082\u3089\u3046\u3068\u3001\u968e\u5c64\u69cb\u9020\u306b\u5408\u308f\u305b\u305f\u6b63\u78ba\u306a\u30bb\u30ec\u30af\u30bf\u304c\u63d0\u6848\u3055\u308c\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u62bd\u8c61\u7684\u306a\u8aac\u660e\u3060\u3051\u3088\u308a\u3001\u5b9f\u7269\u3092\u898b\u305b\u308b\u65b9\u304c\u7cbe\u5ea6\u306e\u9ad8\u3044\u63d0\u6848\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\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;\">closest\/parent\/find\u306e\u69cb\u6587\u3084\u30eb\u30fc\u30eb\u3092\u6697\u8a18\u3057\u3066\u624b\u4f5c\u696d\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u624b\u9593\u3092\u3001\u76ee\u7684\u3092\u4f1d\u3048\u308b\u3060\u3051\u306e\u4f9d\u983c\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u308b\u3002\u4eba\u9593\u304c\u5224\u65ad\u3059\u3079\u304d\u306f\u300c\u305d\u3082\u305d\u3082\u4f55\u3092\u3001\u3069\u3046\u52d5\u304b\u3057\u305f\u3044\u304b\u300d\u3068\u3044\u3046\u90e8\u5206\u3002<\/div>\n  <\/div>\n<\/div>\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\">closest()\u306e\u69cb\u6587\u3084parent()\u3068\u306e\u4f7f\u3044\u5206\u3051\u3092\u6697\u8a18\u3057\u3066\u624b\u4f5c\u696d\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3001\u3068\u3044\u3046\u4f5c\u696d\u81ea\u4f53\u304c\u3001\u4eca\u306e\u6642\u4ee3\u306f\u3082\u3046\u5fc5\u9808\u3067\u306f\u306a\u304f\u306a\u3063\u3066\u304d\u3066\u3044\u308b\u3068\u611f\u3058\u307e\u3059\u3002\u300c\u3069\u306e\u30bb\u30ec\u30af\u30bf\u3092\u3069\u3046\u7d44\u307f\u5408\u308f\u305b\u308b\u3079\u304d\u304b\u300d\u3068\u3044\u3046\u90e8\u5206\u3053\u305dAI\u306b\u76f8\u8ac7\u3059\u308c\u3070\u3044\u3044\u9818\u57df\u3067\u3001\u4eba\u9593\u304c\u5224\u65ad\u3059\u3079\u304d\u306a\u306e\u306f\u300c\u305d\u3082\u305d\u3082\u753b\u9762\u3092\u3069\u3046\u52d5\u304b\u3057\u305f\u3044\u304b\u300d\u3068\u3044\u3046\u8981\u4ef6\u306e\u90e8\u5206\u3067\u3059\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-13\"><\/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;\">13<\/span>\n  <span class=\"section-label\" style=\"display:block;\">PRACTICAL WORKFLOW<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067\u81ea\u793e\u30b5\u30a4\u30c8\u306e\u30dc\u30bf\u30f3\u6319\u52d5\u3092\u4fee\u6b63\u3059\u308b\u5b9f\u8df5\u30d5\u30ed\u30fc<\/span>\n  <span class=\"section-desc\">\u30bf\u30fc\u30df\u30ca\u30eb\u64cd\u4f5c\u306a\u3057\u30fb\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u7248\u3067\u5b8c\u7d50\u3059\u308b4\u30b9\u30c6\u30c3\u30d7<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cClaude Code\u304c\u4fbf\u5229\u306a\u306e\u306f\u5206\u304b\u3063\u305f\u304c\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3058\u3083\u306a\u3044\u306e\u3067\u5c0e\u5165\u304c\u4e0d\u5b89\u300d\u3068\u3044\u3046\u65b9\u5411\u3051\u306b\u3001\u5b9f\u969b\u306b\u3069\u306e\u3088\u3046\u306a\u624b\u9806\u3067\u81ea\u793e\u30b5\u30a4\u30c8\u306e\u30dc\u30bf\u30f3\u6319\u52d5\u3092\u4fee\u6b63\u3057\u3066\u3044\u304f\u306e\u304b\u3092\u6574\u7406\u3057\u307e\u3059\u3002\u30bf\u30fc\u30df\u30ca\u30eb\uff08\u9ed2\u3044\u753b\u9762\uff09\u306e\u77e5\u8b58\u306f\u4e00\u5207\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u76f4\u3057\u305f\u3044\u52d5\u304d\u3092<br>\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308b<\/strong><br><span style=\"font-size:12px;\">\u5bfe\u8c61\u753b\u9762\u30fb<br>\u671f\u5f85\u3059\u308b\u6319\u52d5<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Claude Code\u304c<br>\u30b3\u30fc\u30c9\u751f\u6210<\/strong><br><span style=\"font-size:12px;\">\u30bb\u30ec\u30af\u30bf\u30fb\u63a2\u7d22\u65b9\u5411<br>\u3092\u81ea\u52d5\u5224\u65ad<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5b9f\u969b\u306e\u753b\u9762\u3067<br>\u52d5\u4f5c\u78ba\u8a8d<\/strong><br><span style=\"font-size:12px;\">\u30af\u30ea\u30c3\u30af\u3057\u3066<br>\u7d50\u679c\u3092\u78ba\u8a8d<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u554f\u984c\u306a\u3051\u308c\u3070<br>\u53cd\u6620<\/strong><br><span style=\"font-size:12px;\">\u672c\u756a\u30b5\u30a4\u30c8\u3078<br>\u9069\u7528<\/span><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">13-1. Step1\uff1a\u307e\u305a1\u3064\u306e\u753b\u9762\u306e\u30011\u3064\u306e\u52d5\u304d\u3060\u3051\u3092\u5177\u4f53\u7684\u306b\u4f1d\u3048\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3044\u304d\u306a\u308a\u30b5\u30a4\u30c8\u5168\u4f53\u306e\u4fee\u6b63\u3092\u307e\u3068\u3081\u3066\u4f9d\u983c\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001<strong>\u300c\u3053\u306e\u753b\u9762\u306e\u3001\u3053\u306e\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3068\u304d\u306e\u3001\u3053\u306e\u52d5\u304d\u3060\u3051\u3092\u76f4\u3057\u305f\u3044\u300d\u3068\u3044\u30461\u3064\u306e\u5177\u4f53\u7684\u306a\u8981\u671b<\/strong>\u304b\u3089\u59cb\u3081\u308b\u306e\u304c\u30b3\u30c4\u3067\u3059\u3002\u300c\u30d5\u30a9\u30fc\u30e0\u3092\u4f7f\u3044\u3084\u3059\u304f\u3057\u305f\u3044\u300d\u306e\u3088\u3046\u306a\u62bd\u8c61\u7684\u306a\u4f9d\u983c\u3088\u308a\u3001\u300c\u898b\u7a4d\u30d5\u30a9\u30fc\u30e0\u3067\u3001\u884c\u306e\u53f3\u306b\u3042\u308b\u524a\u9664\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u305f\u3089\u3001\u305d\u306e\u884c\u3060\u3051\u6d88\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u300d\u306e\u3088\u3046\u306a\u5177\u4f53\u7684\u306a\u4f9d\u983c\u306e\u65b9\u304c\u3001\u7cbe\u5ea6\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u3059\u3050\u306b\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">13-2. Step2\uff1a\u51fa\u3066\u304d\u305f\u30b3\u30fc\u30c9\u3092\u5b9f\u969b\u306e\u753b\u9762\u3067\u78ba\u8a8d\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u306f\u30d5\u30a1\u30a4\u30eb\u3092\u76f4\u63a5\u8aad\u307f\u66f8\u304d\u3057\u305f\u308a\u3001\u30b3\u30fc\u30c9\u3092\u305d\u306e\u5834\u3067\u63d0\u793a\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u5b9f\u969b\u306e\u753b\u9762\u306b\u53cd\u6620\u3057\u3001<strong>\u610f\u56f3\u3057\u305f\u884c\u30fb\u8981\u7d20\u3060\u3051\u304c\u52d5\u304f\u304b\u3001\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u6319\u52d5\u3082\u304a\u304b\u3057\u304f\u306a\u3044\u304b<\/strong>\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">13-3. Step3\uff1a\u671f\u5f85\u3068\u9055\u3046\u7d50\u679c\u304c\u51fa\u305f\u3089\u3001\u305d\u306e\u307e\u307e\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u601d\u3063\u3066\u3044\u305f\u52d5\u304d\u3068\u9055\u3046\u300d\u3068\u611f\u3058\u305f\u3089\u3001\u5c02\u9580\u7528\u8a9e\u3092\u4f7f\u308f\u305a\u306b<strong>\u300c\u3007\u3007\u306e\u30b1\u30fc\u30b9\u3060\u3068\u52d5\u304d\u304c\u304a\u304b\u3057\u3044\u300d\u3068\u305d\u306e\u307e\u307e\u4f1d\u3048\u308b<\/strong>\u3060\u3051\u3067\u5341\u5206\u3067\u3059\u300211\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u3088\u3046\u306a\u53d6\u308a\u9055\u3048\u3084\u51e6\u7406\u6f0f\u308c\u306e\u554f\u984c\u3082\u3001Claude Code\u304c\u539f\u56e0\u3092\u7279\u5b9a\u3057\u3066\u4fee\u6b63\u3057\u3066\u304f\u308c\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>\u6700\u521d\u306e\u4f9d\u983c\u306f\u300c1\u3064\u306e\u753b\u9762\u30fb1\u3064\u306e\u30dc\u30bf\u30f3\u306e\u6319\u52d5\u300d\u306b\u7d5e\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>\u5bfe\u8c61\u306eHTML\u69cb\u9020\uff08\u8a72\u5f53\u30d5\u30a1\u30a4\u30eb\u3084\u753b\u9762\uff09\u3092\u5177\u4f53\u7684\u306b\u898b\u305b\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>\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306f\u5fc5\u305a\u4e00\u5ea6\u3001\u5b9f\u969b\u306e\u753b\u9762\u3067\u52d5\u4f5c\u78ba\u8a8d\u3059\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>\u7d50\u679c\u304c\u304a\u304b\u3057\u3044\u3068\u304d\u306f\u5c02\u9580\u7528\u8a9e\u3092\u4f7f\u308f\u305a\u300c\u3007\u3007\u306e\u5834\u5408\u304c\u304a\u304b\u3057\u3044\u300d\u3068\u4f1d\u3048\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>\u3046\u307e\u304f\u3044\u3063\u305f\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u4f3c\u305f\u753b\u9762\uff08\u4ed6\u306e\u4e00\u89a7\u8868\u30fb\u5225\u306e\u30d5\u30a9\u30fc\u30e0\u306a\u3069\uff09\u306b\u3082\u6a2a\u5c55\u958b\u3059\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">13-4. Step4\uff1a\u3046\u307e\u304f\u3044\u3063\u305f\u4fee\u6b63\u30d1\u30bf\u30fc\u30f3\u3092\u6a2a\u5c55\u958b\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3064\u306e\u753b\u9762\u3067\u52b9\u679c\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3089\u3001<strong>\u540c\u3058\u8003\u3048\u65b9\u3092\u4ed6\u306e\u753b\u9762\u306b\u3082\u5e83\u3052\u3066\u3044\u304f<\/strong>\u306e\u304c\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u300c\u6ce8\u6587\u4e00\u89a7\u306e\u884c\u524a\u9664\u300d\u3067\u4f7f\u3063\u305f\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u9867\u5ba2\u30ea\u30b9\u30c8\u3084\u5728\u5eab\u4e00\u89a7\u306a\u3069\u3001\u4f3c\u305f\u69cb\u9020\u306e\u4e00\u89a7\u753b\u9762\u3067\u3042\u308c\u3070\u540c\u69d8\u306b\u5fdc\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\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\">\u5f0a\u793e\u3067\u306f\u3001\u6700\u521d\u306bLP\u306e\u304a\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u3067\u8a66\u3057\u305f\u884c\u8ffd\u52a0\u30fb\u524a\u9664\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u3001\u7ba1\u7406\u753b\u9762\u306e\u6ce8\u6587\u4e00\u89a7\u3084\u3001\u5e83\u544a\u30ec\u30dd\u30fc\u30c8\u306e\u8868\u64cd\u4f5c\u306b\u3082\u305d\u306e\u307e\u307e\u6a2a\u5c55\u958b\u3057\u307e\u3057\u305f\u3002closest()\u3092\u4f7f\u3063\u305f\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u307e\u3068\u307e\u308a\u3092\u7279\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u81ea\u4f53\u306f\u4f7f\u3044\u56de\u305b\u308b\u306e\u3067\u30011\u3064\u6210\u529f\u30d1\u30bf\u30fc\u30f3\u304c\u3067\u304d\u308b\u3068\u5c55\u958b\u304c\u65e9\u3044\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u6240\u304b\u3089\u3001\u305d\u306e\u89aa\u306b\u3042\u305f\u308b\u8981\u7d20\u3092\u7279\u5b9a\u3057\u3066\u64cd\u4f5c\u3059\u308b\u300d\u3068\u3044\u3046\u7d30\u304b\u306aUI\u4fee\u6b63\u306b\u3064\u3044\u3066\u3082\u3001\u8981\u4ef6\u306e\u6574\u7406\u304b\u3089\u5b9f\u88c5\u3001\u5b9f\u753b\u9762\u3067\u306e\u78ba\u8a8d\u307e\u3067\u3092Claude Code\u306b\u4efb\u305b\u308b\u5f62\u3067\u904b\u7528\u3057\u3066\u3044\u307e\u3059\u300210\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u958b\u767a\u30fb\u5e83\u544a\u9818\u57df\u306e\u524a\u6e1b\u4e8b\u4f8b\u3082\u3001\u3053\u3046\u3057\u305f\u7d30\u304b\u306a\u30b5\u30a4\u30c8\u4fee\u6b63\u306e\u7a4d\u307f\u91cd\u306d\u306b\u3088\u308b\u3082\u306e\u3067\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\">closest()\u306e\u69cb\u6587\u30921\u3064\u305a\u3064\u6697\u8a18\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308b\u3068\u3001\u30b5\u30a4\u30c8\u306e\u7d30\u304b\u306a\u6319\u52d5\u4fee\u6b63\u3092\u4f9d\u983c\u3059\u308b\u30cf\u30fc\u30c9\u30eb\u306f\u5927\u304d\u304f\u4e0b\u304c\u308a\u307e\u3059\u3002\u300c\u3069\u306e\u69cb\u6587\u3092\u4f7f\u3046\u304b\u300d\u3088\u308a\u300c\u753b\u9762\u3092\u3069\u3046\u52d5\u304b\u3057\u305f\u3044\u304b\u300d\u3092\u8003\u3048\u308b\u6642\u9593\u306b\u96c6\u4e2d\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u304c\u3001Claude Code\u3092\u4f7f\u3046\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u3060\u3068\u611f\u3058\u3066\u3044\u307e\u3059\u3002<\/div>\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-jquery-closest&#038;blog_slug=cc-jquery-closest\" 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-jquery-closest&#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-14\"><\/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;\">14<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CONCLUSION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u307e\u3068\u3081<\/span>\n  <span class=\"section-desc\">closest()\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u3064\u3064\u3001\u5b9f\u88c5\u306e\u8ca0\u62c5\u306f\u4ed5\u7d44\u307f\u3067\u6e1b\u3089\u3059<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001jQuery\u306eclosest()\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u69cb\u6587\u3001class\u30fbid\u30fb\u30c7\u30fc\u30bf\u5c5e\u6027\u306b\u3088\u308b\u7d5e\u308a\u8fbc\u307f\u3001\u7b2c2\u5f15\u6570\uff08context\uff09\u3001\u30c6\u30fc\u30d6\u30eb\u64cd\u4f5c\u306e\u5b9f\u8df5\u4f8b\u3001\u623b\u308a\u5024\u3068\u6761\u4ef6\u5206\u5c90\u3001parent()\u30fbfind()\u3068\u306e\u9055\u3044\u3001\u696d\u52d9\u30b5\u30a4\u30c8\u3067\u306e\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3\u307e\u3067\u3092\u6574\u7406\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u308a\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>closest()\u306f\u300c\u81ea\u5206\u81ea\u8eab\u3092\u542b\u3081\u3001\u6761\u4ef6\u306b\u5408\u3046\u5148\u7956\u8981\u7d20\u304c\u898b\u3064\u304b\u308b\u307e\u3067\u4e0a\u3078\u8fbf\u308b\u300d\u30e1\u30bd\u30c3\u30c9<\/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>parent()\u306f\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u3057\u304b\u898b\u306a\u3044\u305f\u3081\u3001\u9593\u306b\u8981\u7d20\u304c\u631f\u307e\u3063\u3066\u3044\u308b\u3068\u898b\u3064\u304b\u3089\u306a\u3044<\/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>find()\u306f\u9006\u306b\u300c\u5185\u5074\uff08\u5b50\u5b6b\u65b9\u5411\uff09\u300d\u3092\u63a2\u3059\u30e1\u30bd\u30c3\u30c9\u3067\u3001closest()\u3068\u306f\u65b9\u5411\u304c\u6b63\u53cd\u5bfe<\/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>\u30de\u30c3\u30c1\u3057\u306a\u3051\u308c\u3070\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u8fd4\u308b\u305f\u3081\u3001length \u3067\u5b58\u5728\u78ba\u8a8d\u3059\u308b\u306e\u304c\u5b9a\u77f3<\/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>\u30c6\u30fc\u30d6\u30eb\u64cd\u4f5c\u3067\u306f closest('tr') \u3067\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\u300d\u3092\u6b63\u78ba\u306b\u53d6\u5f97\u3067\u304d\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>\u30c7\u30fc\u30bf\u5c5e\u6027\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u884c\u30fb\u30ab\u30fc\u30c9\u306b\u7d10\u3065\u304f\u56fa\u6709\u306e\u5024\u3082\u540c\u6642\u306b\u53d6\u5f97\u3067\u304d\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>\u69cb\u6587\u3092\u6697\u8a18\u3057\u306a\u304f\u3066\u3082\u3001Claude Code\u306b\u65e5\u672c\u8a9e\u3067\u76ee\u7684\u3092\u4f1d\u3048\u308c\u3070\u9069\u5207\u306a\u89aa\u8981\u7d20\u306e\u51e6\u7406\u3092\u5b9f\u88c5\u3057\u3066\u304f\u308c\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">closest()\u306e\u69cb\u6587\u306f\u7a2e\u985e\u304c\u591a\u3044\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001parent()\u3068\u306e\u63a2\u7d22\u7bc4\u56f2\u306e\u9055\u3044\u3001find()\u3068\u306e\u65b9\u5411\u306e\u9055\u3044\u3001\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u6271\u3044\u306a\u3069\u3001\u6b63\u3057\u304f\u52d5\u304f\u51e6\u7406\u3092\u66f8\u304f\u306b\u306f\u610f\u5916\u3068\u591a\u304f\u306e\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u306f\u672c\u8a18\u4e8b\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u5b9f\u969b\u306e\u753b\u9762\u3067\u52d5\u304b\u3057\u306a\u304c\u3089\u3001\u81ea\u793e\u30b5\u30a4\u30c8\u306e\u6539\u5584\u3057\u305f\u3044\u7b87\u6240\u306b\u5f53\u3066\u306f\u3081\u3066\u8003\u3048\u3066\u307f\u3066\u304f\u3060\u3055\u3044\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\">closest()\u306e\u57fa\u790e\u77e5\u8b58\u306f\u3001\u899a\u3048\u3066\u304a\u3044\u3066\u640d\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u5b9f\u969b\u306e\u696d\u52d9\u3067\u306f\u300c\u5b9f\u969b\u306eHTML\u69cb\u9020\u306b\u5bfe\u3057\u3066\u3001\u3069\u306e\u30bb\u30ec\u30af\u30bf\u30fb\u3069\u306e\u63a2\u7d22\u65b9\u5411\u3092\u4f7f\u3048\u3070\u610f\u56f3\u901a\u308a\u52d5\u304f\u304b\u300d\u3092\u90fd\u5ea6\u78ba\u8a8d\u3059\u308b\u6642\u9593\u306e\u65b9\u304c\u9577\u304f\u306a\u308a\u304c\u3061\u3067\u3059\u3002\u305d\u3046\u3057\u305f\u78ba\u8a8d\u30fb\u5b9f\u88c5\u306e\u624b\u9593\u3092\u6e1b\u3089\u3057\u305f\u3044\u65b9\u306f\u3001AI\u9b3c\u7ba1\u7406\u307e\u3067\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u81ea\u793e\u30b5\u30a4\u30c8\u306e\u7d30\u304b\u306a\u6319\u52d5\u4fee\u6b63\u3001Claude Code\u3067\u4e00\u7dd2\u306b\u9032\u3081\u307e\u305b\u3093\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u4e00\u89a7\u753b\u9762\u306e\u3053\u306e\u30dc\u30bf\u30f3\u306e\u52d5\u304d\u3092\u76f4\u3057\u305f\u3044\u300d\u300c\u30d5\u30a9\u30fc\u30e0\u306e\u884c\u3092\u8ffd\u52a0\u30fb\u524a\u9664\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u300d\u2014\u2014\u5f0a\u793eAI\u9b3c\u7ba1\u7406\u3067\u306f\u3001Claude Code\u3092\u4f7f\u3063\u305fWeb\u30b5\u30a4\u30c8\u306e\u6319\u52d5\u4fee\u6b63\u30fb\u696d\u52d9\u753b\u9762\u306e\u6539\u5584\u652f\u63f4\u304b\u3089\u5c0e\u5165\u307e\u3067\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\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\">\u76f4\u3057\u305f\u3044\u753b\u9762\u3068\u3001\u5b9f\u73fe\u3057\u305f\u3044\u52d5\u304d\u3092\u898b\u305b\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u305d\u306e\u5834\u3067\u5b9f\u88c5\u30a4\u30e1\u30fc\u30b8\u3092\u304a\u4f1d\u3048\u3067\u304d\u307e\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u76f8\u8ac7\u3067\u3001\u4eca\u304b\u304b\u3063\u3066\u3044\u308b\u30b5\u30a4\u30c8\u4fee\u6b63\u30fb\u78ba\u8a8d\u4f5c\u696d\u306e\u6642\u9593\u611f\u899a\u3092\u304a\u805e\u304b\u305b\u304f\u3060\u3055\u3044\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#fff;border:2px solid #eee;border-radius:16px;padding:32px 20px;margin:48px 0 16px;\">\n  <p style=\"text-align:center;font-size:13px;font-weight:700;color:#dc2626;letter-spacing:2px;margin:0 0 12px;\">NEXT STEP<\/p>\n  <p style=\"text-align:center;font-size:22px;font-weight:800;line-height:1.5;color:#1a1a1a;margin:0 0 24px;\">\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=\"display:flex;gap:16px;flex-wrap:wrap;justify-content:center;\">\n    <div style=\"flex:1 1 300px;max-width:560px;background:#fafafa;border:1px solid #eee;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;\">\n      <img src=\"https:\/\/genai-ai.co.jp\/img\/flagship-onikanri.png\" alt=\"AI\u9b3c\u7ba1\u7406 \u2014 Claude Code\u5c0e\u5165\u652f\u63f4\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto;aspect-ratio:16\/9;object-fit:cover;display:block;\">\n      <div style=\"padding:20px 20px 24px;display:flex;flex-direction:column;flex:1;\">\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;color:#1a1a1a;margin:0 0 12px;\">AI\u9b3c\u7ba1\u7406<\/p>\n        <p style=\"font-size:14px;color:#555;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;margin-top:auto;\">\n          <a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&utm_medium=article&utm_campaign=cc-jquery-closest&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    <div style=\"flex:1 1 300px;max-width:560px;background:#fafafa;border:1px solid #eee;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;\">\n      <img src=\"https:\/\/genai-ai.co.jp\/img\/flagship-aibpo.png\" alt=\"AIBPO by AI\u9b3c\u7ba1\u7406 \u2014 \u5b9a\u578b\u696d\u52d9\u306e\u4e38\u3054\u3068\u4ee3\u884c\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto;aspect-ratio:16\/9;object-fit:cover;display:block;\">\n      <div style=\"padding:20px 20px 24px;display:flex;flex-direction:column;flex:1;\">\n        <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">\u696d\u52d9\u3092\u4e38\u3054\u3068\u4efb\u305b\u305f\u3044\u65b9\u3078<\/p>\n        <p style=\"font-size:20px;font-weight:800;color:#1a1a1a;margin:0 0 12px;\">AIBPO by AI\u9b3c\u7ba1\u7406<\/p>\n        <p style=\"font-size:14px;color:#555;margin:0 0 20px;line-height:1.7;\">\u8acb\u6c42\u51e6\u7406\u30fb\u30c7\u30fc\u30bf\u5165\u529b\u30fb\u554f\u3044\u5408\u308f\u305b\u5bfe\u5fdc\u306a\u3069\u306e\u5b9a\u578b\u696d\u52d9\u3092\u3001AI\u00d7\u4eba\u306e\u54c1\u8cea\u7ba1\u7406\u4f53\u5236\u3067\u4e38\u3054\u3068\u4ee3\u884c\u3002\u3044\u307e\u306e\u30b3\u30b9\u30c8\u306e75%\u76ee\u5b89\u3067\u3001\u65e5\u3005\u306f\u6210\u679c\u7269\u3092\u627f\u8a8d\u3059\u308b\u3060\u3051\u3002<\/p>\n        <div style=\"text-align:center;margin-top:auto;\">\n          <a href=\"https:\/\/genai-ai.co.jp\/ai-kanri\/ai-bpo\/?utm_source=blog&utm_medium=article&utm_campaign=cc-jquery-closest&utm_content=next-step-cta-bpo\" 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;\">AIBPO\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n        <\/div>\n      <\/div>\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. closest()\u3068\u306f\u4f55\u3092\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. closest()\u306f\u3001jQuery\u3067\u300c\u4eca\u64cd\u4f5c\u3057\u3066\u3044\u308b\u8981\u7d20\u81ea\u8eab\u3001\u307e\u305f\u306f\u305d\u306e\u89aa\u30fb\u7956\u7236\u6bcd\u2026\u306b\u3042\u305f\u308b\u5148\u7956\u8981\u7d20\u306e\u4e2d\u304b\u3089\u3001\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u306b\u6700\u521d\u306b\u4e00\u81f4\u3059\u308b\u3082\u306e\u3092\u53d6\u5f97\u3059\u308b\u300d\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u305d\u306e\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\u3084\u30ab\u30fc\u30c9\u306a\u3069\u300c\u3072\u3068\u307e\u3068\u307e\u308a\u306e\u60c5\u5831\u300d\u3092\u7279\u5b9a\u3057\u305f\u3044\u3068\u304d\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u304c\u898b\u3064\u304b\u308b\u307e\u3067\u3001document\uff08\u30da\u30fc\u30b8\u5168\u4f53\u306e\u6839\u3063\u3053\uff09\u306b\u5230\u9054\u3059\u308b\u307e\u3067\u4e0a\u65b9\u5411\u3078\u63a2\u7d22\u3092\u7d9a\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. closest()\u3068parent()\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. parent()\u306f\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u306e\u89aa\u3057\u304b\u898b\u305a\u3001\u305d\u306e\u89aa\u304c\u30bb\u30ec\u30af\u30bf\u306b\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u300c\u8a72\u5f53\u306a\u3057\u300d\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9closest()\u306f\u81ea\u5206\u81ea\u8eab\u3092\u542b\u3081\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u307e\u3067\u4f55\u968e\u5c64\u3067\u3082\u4e0a\u3078\u305f\u3069\u308a\u7d9a\u3051\u307e\u3059\u3002\u88c5\u98fe\u7528\u306ediv\u306a\u3069\u304c\u9593\u306b\u631f\u307e\u3063\u3066\u3044\u308b\u5b9f\u52d9\u306eHTML\u3067\u306f\u3001\u968e\u5c64\u6570\u306b\u4f9d\u5b58\u3057\u306a\u3044closest()\u306e\u65b9\u304c\u610f\u56f3\u3057\u305f\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u3084\u3059\u3044\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. closest()\u3068find()\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. closest()\u306f\u81ea\u5206\u3088\u308a\u5916\u5074\uff08\u7956\u5148\u65b9\u5411\uff09\u3092\u63a2\u3057\u3001find()\u306f\u81ea\u5206\u3088\u308a\u5185\u5074\uff08\u5b50\u5b6b\u65b9\u5411\uff09\u3092\u63a2\u3059\u3068\u3044\u3046\u3001\u63a2\u7d22\u306e\u65b9\u5411\u304c\u305d\u3082\u305d\u3082\u9006\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u305d\u308c\u304c\u5c5e\u3059\u308b\u5916\u5074\u306e\u307e\u3068\u307e\u308a\u3092\u77e5\u308a\u305f\u3044\u300d\u306a\u3089closest()\u3001\u300c\u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u306b\u3042\u308b\u7279\u5b9a\u306e\u90e8\u54c1\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u300d\u306a\u3089find()\u3092\u4f7f\u3044\u307e\u3059\u3002\u4e21\u8005\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u307e\u305aclosest()\u3067\u5bfe\u8c61\u3092\u7279\u5b9a\u3057\u3001\u305d\u306e\u3042\u3068find()\u3067\u4e2d\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u4f7f\u3044\u65b9\u3082\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. closest()\u3067\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306f\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30a8\u30e9\u30fc\u306b\u306f\u306a\u3089\u305a\u3001\u8981\u7d20\u6570\u304c0\u4ef6\u306e\u7a7a\u306ejQuery\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u8fd4\u308a\u307e\u3059\u3002\u3053\u306e\u72b6\u614b\u306e\u307e\u307e\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3082\u76ee\u306b\u898b\u3048\u308b\u30a8\u30e9\u30fc\u306f\u51fa\u306a\u3044\u305f\u3081\u3001$el.length\uff08\u30de\u30c3\u30c1\u4ef6\u6570\uff09\u3067\u898b\u3064\u304b\u3063\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u5f8c\u7d9a\u306e\u51e6\u7406\u3092\u66f8\u304f\u306e\u304c\u5b9a\u77f3\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u30c6\u30fc\u30d6\u30eb\u306e\u884c\u30921\u884c\u3060\u3051\u64cd\u4f5c\u3057\u305f\u3044\u3068\u304d\u3001\u3069\u3046\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u5404\u884c\u306e\u524a\u9664\u30dc\u30bf\u30f3\u306a\u3069\u306b\u30a4\u30d9\u30f3\u30c8\u3092\u8a2d\u5b9a\u3057\u3001\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089 closest('tr') \u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u3001\u305d\u306e\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\u3060\u3051\u3092\u6b63\u78ba\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u884c\u6570\u304c\u3044\u304f\u3064\u3042\u3063\u3066\u3082\u3001\u4ed6\u306e\u884c\u304c\u8aa4\u3063\u3066\u9078\u3070\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u884c\u306b\u7d10\u3065\u304f\u56fa\u6709\u306e\u5024\uff08\u6ce8\u6587\u756a\u53f7\u306a\u3069\uff09\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u5834\u5408\u306f\u3001data-\u5c5e\u6027\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u5b9a\u756a\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. closest()\u306e\u7b2c2\u5f15\u6570\uff08context\uff09\u306f\u4f55\u306e\u305f\u3081\u306b\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u691c\u7d22\u3059\u308b\u7bc4\u56f2\u3092\u3001\u6307\u5b9a\u3057\u305f\u8981\u7d20\u306e\u5185\u5074\u3060\u3051\u306b\u9650\u5b9a\u3059\u308b\u305f\u3081\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3059\u30021\u3064\u306e\u30da\u30fc\u30b8\u306b\u540c\u3058\u30af\u30e9\u30b9\u540d\u306e\u69cb\u9020\u304c\u8907\u6570\u7b87\u6240\u306b\u307e\u305f\u304c\u3063\u3066\u5b58\u5728\u3059\u308b\u5834\u5408\u3001\u7b2c2\u5f15\u6570\u3067\u691c\u7d22\u7bc4\u56f2\u3092\u7d5e\u308b\u3053\u3068\u3067\u3001\u610f\u56f3\u3057\u306a\u3044\u5225\u306e\u5834\u6240\u306b\u3042\u308b\u8981\u7d20\u304c\u8aa4\u3063\u3066\u53d6\u5f97\u3055\u308c\u308b\u306e\u3092\u9632\u3052\u307e\u3059\u3002\u305f\u3060\u3057\u5b9f\u52d9\u3067\u306f\u7701\u7565\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u5927\u534a\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. jQuery\u3092\u52c9\u5f37\u3057\u3066\u3044\u306a\u304f\u3066\u3082\u3001closest()\u3092\u4f7f\u3063\u305f\u51e6\u7406\u306f\u4f5c\u308c\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u4f5c\u308c\u307e\u3059\u3002Claude Code\u306e\u3088\u3046\u306a\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u578bAI\u30c4\u30fc\u30eb\u3067\u3042\u308c\u3070\u3001\u5b9f\u73fe\u3057\u305f\u3044\u753b\u9762\u306e\u52d5\u304d\u3068\u5bfe\u8c61\u306eHTML\u69cb\u9020\u3092\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308b\u3060\u3051\u3067\u3001closest\u30fbparent\u30fbfind\u306e\u3069\u308c\u3092\u4f7f\u3046\u3079\u304d\u304b\u3001\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\u307e\u3067\u542b\u3081\u3066\u8003\u616e\u3057\u305f\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002\u69cb\u6587\u3092\u6697\u8a18\u3057\u3066\u3044\u306a\u304f\u3066\u3082\u3001\u76ee\u7684\u3092\u8a00\u8a9e\u5316\u3067\u304d\u308c\u3070\u5b9f\u88c5\u306b\u305f\u3069\u308a\u7740\u3051\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\": \"closest()\u3068\u306f\u4f55\u3092\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"closest()\u306f\u3001jQuery\u3067\u300c\u4eca\u64cd\u4f5c\u3057\u3066\u3044\u308b\u8981\u7d20\u81ea\u8eab\u3001\u307e\u305f\u306f\u305d\u306e\u89aa\u30fb\u7956\u7236\u6bcd\u2026\u306b\u3042\u305f\u308b\u5148\u7956\u8981\u7d20\u306e\u4e2d\u304b\u3089\u3001\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u306b\u6700\u521d\u306b\u4e00\u81f4\u3059\u308b\u3082\u306e\u3092\u53d6\u5f97\u3059\u308b\u300d\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u305d\u306e\u30dc\u30bf\u30f3\u304c\u5c5e\u3059\u308b\u884c\u3084\u30ab\u30fc\u30c9\u306a\u3069\u300c\u3072\u3068\u307e\u3068\u307e\u308a\u306e\u60c5\u5831\u300d\u3092\u7279\u5b9a\u3057\u305f\u3044\u3068\u304d\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u304c\u898b\u3064\u304b\u308b\u307e\u3067\u3001document\uff08\u30da\u30fc\u30b8\u5168\u4f53\u306e\u6839\u3063\u3053\uff09\u306b\u5230\u9054\u3059\u308b\u307e\u3067\u4e0a\u65b9\u5411\u3078\u63a2\u7d22\u3092\u7d9a\u3051\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"closest()\u3068parent()\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"parent()\u306f\u76f4\u8fd1\u306e1\u968e\u5c64\u4e0a\u306e\u89aa\u3057\u304b\u898b\u305a\u3001\u305d\u306e\u89aa\u304c\u30bb\u30ec\u30af\u30bf\u306b\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u300c\u8a72\u5f53\u306a\u3057\u300d\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9closest()\u306f\u81ea\u5206\u81ea\u8eab\u3092\u542b\u3081\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u307e\u3067\u4f55\u968e\u5c64\u3067\u3082\u4e0a\u3078\u305f\u3069\u308a\u7d9a\u3051\u307e\u3059\u3002\u88c5\u98fe\u7528\u306ediv\u306a\u3069\u304c\u9593\u306b\u631f\u307e\u3063\u3066\u3044\u308b\u5b9f\u52d9\u306eHTML\u3067\u306f\u3001\u968e\u5c64\u6570\u306b\u4f9d\u5b58\u3057\u306a\u3044closest()\u306e\u65b9\u304c\u610f\u56f3\u3057\u305f\u8981\u7d20\u3092\u78ba\u5b9f\u306b\u53d6\u5f97\u3057\u3084\u3059\u3044\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"closest()\u3068find()\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"closest()\u306f\u81ea\u5206\u3088\u308a\u5916\u5074\uff08\u7956\u5148\u65b9\u5411\uff09\u3092\u63a2\u3057\u3001find()\u306f\u81ea\u5206\u3088\u308a\u5185\u5074\uff08\u5b50\u5b6b\u65b9\u5411\uff09\u3092\u63a2\u3059\u3068\u3044\u3046\u3001\u63a2\u7d22\u306e\u65b9\u5411\u304c\u305d\u3082\u305d\u3082\u9006\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u300c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u30dc\u30bf\u30f3\u304b\u3089\u3001\u305d\u308c\u304c\u5c5e\u3059\u308b\u5916\u5074\u306e\u307e\u3068\u307e\u308a\u3092\u77e5\u308a\u305f\u3044\u300d\u306a\u3089closest()\u3001\u300c\u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u306b\u3042\u308b\u7279\u5b9a\u306e\u90e8\u54c1\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u300d\u306a\u3089find()\u3092\u4f7f\u3044\u307e\u3059\u3002\u4e21\u8005\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u307e\u305aclosest()\u3067\u5bfe\u8c61\u3092\u7279\u5b9a\u3057\u3001\u305d\u306e\u3042\u3068find()\u3067\u4e2d\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u4f7f\u3044\u65b9\u3082\u4e00\u822c\u7684\u3067\u3059\u3002\"\n 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