{"id":18104,"date":"2026-07-14T16:13:31","date_gmt":"2026-07-14T16:13:31","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=18104"},"modified":"2026-07-19T15:12:35","modified_gmt":"2026-07-19T15:12:35","slug":"css-position-sticky","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css-position-sticky\/","title":{"rendered":"\u30102026\u5e74\u7248\u3011position: sticky\u3067\u8ffd\u5f93\u3055\u305b\u308b\u65b9\u6cd5\uff5c\u30d8\u30c3\u30c0\u30fc\u30fb\u76ee\u6b21\u30fb\u8868\u3092\u56fa\u5b9a"},"content":{"rendered":"<p class=\"wp-block-paragraph\">CSS\u3067\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3082\u30d8\u30c3\u30c0\u30fc\u304c\u8ffd\u3044\u304b\u3051\u3066\u304f\u308b\u300d\u300c\u76ee\u6b21\u304c\u753b\u9762\u306b\u56fa\u5b9a\u3055\u308c\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u52d5\u304d\u3092\u5b9f\u88c5\u3057\u305f\u3044\u3068\u304d\u3001<code>position: sticky<\/code> \u304c\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u5f37\u529b\u306a\u9078\u629e\u80a2\u3067\u3059\u3002JavaScript\u306f\u4e0d\u8981\u3067\u3001\u6570\u884c\u306eCSS\u3060\u3051\u3067\u8ffd\u5f93UI\u3092\u4f5c\u308c\u307e\u3059\u3002\u304b\u3064\u3066\u306f JavaScript \u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u76e3\u8996\u3067\u3057\u304b\u5b9f\u73fe\u3067\u304d\u306a\u304b\u3063\u305f\u3053\u306e\u52d5\u304d\u304c\u3001\u4eca\u3084\u7d14\u7c8b\u306aCSS\u30d7\u30ed\u30d1\u30c6\u30a3\u4e00\u884c\u3067\u5b9f\u88c5\u3067\u304d\u308b\u6642\u4ee3\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u3057\u304b\u3057\u300c\u66f8\u3044\u305f\u306e\u306b\u52d5\u304b\u306a\u3044\u300d\u300c\u306a\u305c\u304b\u56fa\u5b9a\u3055\u308c\u306a\u3044\u300d\u3068\u3044\u3046\u30c8\u30e9\u30d6\u30eb\u306b\u76f4\u9762\u3059\u308b\u30b1\u30fc\u30b9\u3082\u591a\u304f\u3001\u539f\u56e0\u3092\u77e5\u3089\u306a\u3044\u307e\u307e\u8a66\u884c\u932f\u8aa4\u3067\u6642\u9593\u3092\u6eb6\u304b\u3057\u3066\u3057\u307e\u3044\u304c\u3061\u3067\u3059\u3002position: sticky \u306f\u8a2d\u5b9a\u304c\u7c21\u5358\u306a\u4e00\u65b9\u3067\u3001\u300c\u89aa\u8981\u7d20\u306e overflow\u300d\u300c\u9ad8\u3055\u306e\u95a2\u4fc2\u300d\u300cdisplay \u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u306e\u5e72\u6e09\u300d\u306a\u3069\u3001\u8907\u6570\u306e\u843d\u3068\u3057\u7a74\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u77e5\u3089\u305a\u306b\u66f8\u3044\u3066\u3082\u52d5\u304b\u306a\u3044\u306e\u306f\u5f53\u7136\u3067\u3001\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3066\u304b\u3089\u66f8\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u3067\u306f\u3001position: sticky \u306e\u4ed5\u7d44\u307f\u304b\u3089\u3001\u30d8\u30c3\u30c0\u30fc\u30fb\u76ee\u6b21\u30fb\u30c6\u30fc\u30d6\u30eb\u3078\u306e\u5fdc\u7528\u3001\u305d\u3057\u3066\u300c\u52b9\u304b\u306a\u3044\u300d\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\u307e\u3067\u3001\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u7db2\u7f85\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u521d\u5fc3\u8005\u306e\u65b9\u306f\u57fa\u672c\u304b\u3089\u9806\u756a\u306b\u8aad\u307f\u9032\u3081\u3066\u304f\u3060\u3055\u3044\u3002\u7d4c\u9a13\u8005\u306e\u65b9\u306f\u76ee\u6b21\u304b\u3089\u300c\u52b9\u304b\u306a\u3044\u539f\u56e0\u3068\u5bfe\u51e6\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u76f4\u63a5\u30b8\u30e3\u30f3\u30d7\u3057\u3066\u3044\u305f\u3060\u3044\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u5148\u306b\u3001\u3053\u306e\u8a18\u4e8b\u306e\u7d50\u8ad6\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li><code>position: sticky<\/code> \u306f <code>top<\/code>\uff08\u307e\u305f\u306f <code>bottom<\/code>\uff09\u3092\u5fc5\u305a\u6307\u5b9a\u3057\u306a\u3044\u3068\u52d5\u304b\u306a\u3044<\/li>\n<li>\u89aa\u8981\u7d20\u306b <code>overflow: hidden \/ auto \/ scroll<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068 sticky \u304c\u7121\u52b9\u306b\u306a\u308b<\/li>\n<li>\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u304c\u5b50\u8981\u7d20\u3088\u308a\u5927\u304d\u304f\u306a\u3044\u3068 sticky \u304c\u52b9\u304f\u300c\u4f59\u5730\u300d\u304c\u306a\u3044<\/li>\n<li>\u30d8\u30c3\u30c0\u30fc\u30fb\u30b5\u30a4\u30c9\u30d0\u30fc\u76ee\u6b21\u30fb\u30c6\u30fc\u30d6\u30eb\u306ethead\u56fa\u5b9a\u306a\u3069\u3001\u5e45\u5e83\u3044\u5834\u9762\u3067JavaScript\u4e0d\u8981\u3067\u5b9f\u73fe\u3067\u304d\u308b<\/li>\n<li>\u300c\u52b9\u304b\u306a\u3044\u300d\u30d1\u30bf\u30fc\u30f3\u306f7\u3064\u306b\u96c6\u7d04\u3067\u304d\u3001\u305d\u308c\u305e\u308c\u660e\u78ba\u306a\u5bfe\u51e6\u6cd5\u304c\u3042\u308b<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\">position: sticky\u3068\u306f\uff1ffixed \/ absolute \u3068\u306e\u9055\u3044<\/h2>\n\n\n<p class=\"wp-block-paragraph\"><code>position: sticky<\/code> \u306f\u300c\u901a\u5e38\u30d5\u30ed\u30fc\u306e\u4e2d\u306b\u914d\u7f6e\u3055\u308c\u3064\u3064\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u4f4d\u7f6e\u306b\u5fdc\u3058\u3066\u753b\u9762\u306b\u56fa\u5b9a\u3055\u308c\u308b\u300d\u3068\u3044\u3046\u3001<code>relative<\/code> \u3068 <code>fixed<\/code> \u306e\u4e2d\u9593\u7684\u306a\u6319\u52d5\u3092\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u524d\u306f\u901a\u5e38\u306e\u30d6\u30ed\u30c3\u30af\u8981\u7d20\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u6307\u5b9a\u3057\u305f\u95be\u5024\uff08<code>top<\/code> \u5024\u306a\u3069\uff09\u306b\u9054\u3057\u305f\u77ac\u9593\u304b\u3089\u56fa\u5b9a\u8868\u793a\u306b\u5207\u308a\u66ff\u308f\u308a\u307e\u3059\u3002\u30da\u30fc\u30b8\u4e0a\u90e8\u304b\u3089\u8981\u7d20\u304c\u6d41\u308c\u3066\u304d\u3066\u3001\u753b\u9762\u4e0a\u7aef\u306b\u5c4a\u3044\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u300c\u5f35\u308a\u4ed8\u304f\u300d\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u4ed6\u306e position \u5024\u3068\u306e\u9055\u3044\u3092\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d7\u30ed\u30d1\u30c6\u30a3<\/th><th>\u901a\u5e38\u30d5\u30ed\u30fc<\/th><th>\u57fa\u6e96\u70b9<\/th><th>\u30b9\u30af\u30ed\u30fc\u30eb\u3068\u306e\u95a2\u4fc2<\/th><th>\u7528\u9014\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>static\uff08\u521d\u671f\u5024\uff09<\/td><td>\u7dad\u6301\u3059\u308b<\/td><td>\u306a\u3057<\/td><td>\u4e00\u7dd2\u306b\u52d5\u304f<\/td><td>\u901a\u5e38\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u7f6e<\/td><\/tr><tr><td>relative<\/td><td>\u7dad\u6301\u3059\u308b<\/td><td>\u81ea\u5206\u81ea\u8eab<\/td><td>\u4e00\u7dd2\u306b\u52d5\u304f<\/td><td>z-index\u3084\u5b50\u306eabsolute\u306e\u57fa\u6e96<\/td><\/tr><tr><td>absolute<\/td><td>\u5916\u308c\u308b<\/td><td>\u76f4\u8fd1\u306e\u975estatic\u7956\u5148<\/td><td>\u4e00\u7dd2\u306b\u52d5\u304f<\/td><td>\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30fb\u30d0\u30c3\u30b8\u914d\u7f6e<\/td><\/tr><tr><td>fixed<\/td><td>\u5916\u308c\u308b<\/td><td>\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8<\/td><td>\u5e38\u306b\u56fa\u5b9a<\/td><td>\u30e2\u30fc\u30c0\u30eb\u30fb\u30c1\u30e3\u30c3\u30c8\u30dc\u30bf\u30f3<\/td><\/tr><tr><td>sticky<\/td><td>\u7dad\u6301\u3059\u308b<\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca<\/td><td>\u95be\u5024\u307e\u3067\u52d5\u304f\u30fb\u4ee5\u964d\u56fa\u5b9a<\/td><td>\u8ffd\u5f93\u30d8\u30c3\u30c0\u30fc\u30fb\u76ee\u6b21\u30fbthead\u56fa\u5b9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p class=\"wp-block-paragraph\"><code>fixed<\/code> \u306f\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u3092\u57fa\u6e96\u306b\u5e38\u6642\u56fa\u5b9a\u3055\u308c\u308b\u305f\u3081\u3001\u30da\u30fc\u30b8\u306e\u4ed6\u306e\u8981\u7d20\u3068\u91cd\u306a\u308a\u3084\u3059\u304f\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u5d29\u308c\u3078\u306e\u5bfe\u51e6\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f <code>fixed<\/code> \u306f\u901a\u5e38\u30d5\u30ed\u30fc\u304b\u3089\u5916\u308c\u308b\u305f\u3081\u3001\u30da\u30fc\u30b8\u306b\u300c\u9699\u9593\u300d\u304c\u3067\u304d\u306a\u3044\u3088\u3046 padding \u306a\u3069\u3067\u8abf\u6574\u3059\u308b\u624b\u9593\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u4e00\u65b9 <code>sticky<\/code> \u306f\u89aa\u8981\u7d20\u306e\u7bc4\u56f2\u5185\u3067\u3060\u3051\u56fa\u5b9a\u3055\u308c\u308b\u305f\u3081\u3001\u89aa\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u7d42\u308f\u308b\u3068\u81ea\u7136\u306b\u6d41\u308c\u3066\u3044\u304d\u307e\u3059\u3002\u901a\u5e38\u30d5\u30ed\u30fc\u5185\u306b\u7559\u307e\u308b\u306e\u3067\u4ed6\u306e\u8981\u7d20\u3068\u306e\u91cd\u306a\u308a\u3082\u5236\u5fa1\u3057\u3084\u3059\u3044\u3067\u3059\u3002\u3053\u308c\u304c\u30b5\u30a4\u30c9\u30d0\u30fc\u76ee\u6b21\u3084thead\u56fa\u5b9a\u306b\u9069\u3057\u3066\u3044\u308b\u7406\u7531\u3067\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">sticky \u306e\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u300d\u3068\u306f<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u304c\u56fa\u5b9a\u3055\u308c\u308b\u57fa\u6e96\u306f\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u300d\u3067\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u3068\u306f\u3001<code>overflow: scroll<\/code> \u307e\u305f\u306f <code>overflow: auto<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u6700\u3082\u8fd1\u3044\u7956\u5148\u8981\u7d20\u306e\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u7956\u5148\u304c\u306a\u3051\u308c\u3070\u3001\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\uff08\u30d6\u30e9\u30a6\u30b6\u306e\u8868\u793a\u9818\u57df\u305d\u306e\u3082\u306e\uff09\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306b\u306a\u308a\u307e\u3059\u3002body \u5168\u4f53\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u4e00\u822c\u7684\u306a\u30da\u30fc\u30b8\u3067\u306f\u3001\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u304c\u57fa\u6e96\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u5b9a\u306e div \u5185\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u306f\u3001\u305d\u306e div \u304c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u300c\u66f8\u3044\u305f\u306f\u305a\u306a\u306e\u306b\u52d5\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u4e8b\u614b\u306b\u9665\u308a\u3084\u3059\u3044\u306e\u3067\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u306a\u304a\u3001sticky \u8981\u7d20\u306f\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4e00\u90e8\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u81ea\u4f53\u306e\u76f4\u63a5\u306e\u5b50\u8981\u7d20\u3067\u306a\u3044\u5834\u5408\u3084\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u3068\u540c\u3058\u5927\u304d\u3055\u306e\u5834\u5408\u306a\u3069\u3001\u6761\u4ef6\u304c\u63c3\u308f\u306a\u3044\u3068 sticky \u306f\u7121\u52b9\u306b\u306a\u308a\u307e\u3059\u3002\u300c\u306a\u305c\u52d5\u304b\u306a\u3044\u306e\u304b\u300d\u3068\u8ff7\u3063\u305f\u3068\u304d\u306f\u3001\u307e\u305a\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u304c\u3069\u3053\u306b\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3092\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\">\u57fa\u672c\u306e\u4f7f\u3044\u65b9\uff08top\u6307\u5b9a\u3068\u300c\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u30fb\u30b9\u30af\u30ed\u30fc\u30eb\u7bc4\u56f2\u300d\u306e\u95a2\u4fc2\uff09<\/h2>\n\n\n<p class=\"wp-block-paragraph\">position: sticky \u306e\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u66f8\u304d\u65b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<code>top<\/code> \u306e\u5024\u306f\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306e\u4e0a\u7aef\u304b\u3089\u3069\u306e\u8ddd\u96e2\u307e\u3067\u6765\u305f\u3089\u56fa\u5b9a\u3059\u308b\u304b\u300d\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u8981\u7d20\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u3088\u3063\u3066\u753b\u9762\u4e0a\u7aef\u304b\u3089 <code>top<\/code> \u306e\u5024\u4ee5\u4e0b\u306e\u4f4d\u7f6e\u307e\u3067\u5230\u9054\u3059\u308b\u3068\u3001\u305d\u306e\u5834\u6240\u306b\u56fa\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.sticky-element {\n  position: sticky;\n  top: 0; \/* \u753b\u9762\u4e0a\u7aef\u306b\u5230\u9054\u3057\u305f\u3089\u56fa\u5b9a *\/\n}\n<\/code><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\"><code>top: 0<\/code> \u306f\u753b\u9762\u4e0a\u7aef\u30d4\u30c3\u30bf\u30ea\u3067\u56fa\u5b9a\u3057\u307e\u3059\u3002\u30b5\u30a4\u30c8\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u305d\u306e\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u5206\u3060\u3051\u4f59\u767d\u3092\u3042\u3051\u307e\u3059\u3002\u4f8b\u3048\u3070\u30d8\u30c3\u30c0\u30fc\u304c\u9ad8\u3055 60px \u306a\u3089 <code>top: 60px<\/code> \u3068\u3057\u307e\u3059\u3002\u3053\u3053\u3092\u5408\u308f\u305b\u306a\u3044\u3068\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u306b\u96a0\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u5b9f\u969b\u306e\u6848\u4ef6\u3067\u306f\u5fc5\u305a\u30d8\u30c3\u30c0\u30fc\u9ad8\u3055\u306b\u5408\u308f\u305b\u305f top \u5024\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.sticky-element {\n  position: sticky;\n  top: 60px; \/* 60px\u306e\u30d8\u30c3\u30c0\u30fc\u5206\u3060\u3051\u4e0b\u3052\u308b *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u304c sticky \u306e\u300c\u6709\u52b9\u7bc4\u56f2\u300d\u3092\u6c7a\u3081\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u8981\u7d20\u306f\u300c\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u300d\u306e\u7bc4\u56f2\u5185\u3067\u3057\u304b\u56fa\u5b9a\u3055\u308c\u307e\u305b\u3093\u3002\u89aa\u8981\u7d20\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u7d42\u308f\u308b\u3068\u3001sticky \u8981\u7d20\u3082\u305d\u308c\u4ee5\u4e0a\u56fa\u5b9a\u3055\u308c\u305a\u306b\u4e0a\u306b\u6d41\u308c\u3066\u3044\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u30b5\u30a4\u30c9\u30d0\u30fc\u306e\u76ee\u6b21\u3092 sticky \u306b\u3059\u308b\u5834\u5408\u3001\u305d\u306e\u76ee\u6b21\u306e\u89aa\u3067\u3042\u308b\u30b5\u30a4\u30c9\u30d0\u30fc div \u306e\u9ad8\u3055\u304c\u8a18\u4e8b\u672c\u6587\u3088\u308a\u77ed\u3044\u3068\u3001\u76ee\u6b21\u306f\u3059\u3050\u306b\u56fa\u5b9a\u304c\u5916\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u7279\u306b\u30b5\u30a4\u30c9\u30d0\u30fc\u76ee\u6b21\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u591a\u304f\u5f15\u3063\u304b\u304b\u308b\u843d\u3068\u3057\u7a74\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001sticky \u8981\u7d20\u306e\u89aa\uff08\u307e\u305f\u306f\u305d\u306e\u4e0a\u4f4d\u306e\u8981\u7d20\uff09\u3092\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u7bc4\u56f2\u5168\u4f53\u306b\u308f\u305f\u3063\u3066\u5341\u5206\u306a\u9ad8\u3055\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Flexbox \u3084 Grid \u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u3001<code>align-self: stretch<\/code> \u3084 <code>align-items: stretch<\/code> \u3067\u9ad8\u3055\u3092\u5f15\u304d\u4f38\u3070\u3059\u304b\u3001\u610f\u56f3\u7684\u306b <code>align-self: start<\/code> \u3092\u8a2d\u5b9a\u3057\u3066 sticky \u306e\u6709\u52b9\u7bc4\u56f2\u3092\u78ba\u4fdd\u3059\u308b\u3068\u3044\u3063\u305f\u5bfe\u51e6\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;div class=\"sidebar\"&gt;\n  &lt;!-- \u3053\u306e div \u306e\u9ad8\u3055\u304c sticky \u306e\u6709\u52b9\u7bc4\u56f2\u3092\u6c7a\u3081\u308b --&gt;\n  &lt;nav class=\"toc\"&gt;\n    &lt;ul&gt;\n      &lt;li&gt;&lt;a href=\"#h2-1\"&gt;\u898b\u51fa\u30571&lt;\/a&gt;&lt;\/li&gt;\n      &lt;li&gt;&lt;a href=\"#h2-2\"&gt;\u898b\u51fa\u30572&lt;\/a&gt;&lt;\/li&gt;\n    &lt;\/ul&gt;\n  &lt;\/nav&gt;\n&lt;\/div&gt;\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.sidebar {\n  \/* \u89aa\u306e\u9ad8\u3055\u3092\u660e\u793a\u307e\u305f\u306f align-self: stretch \u306a\u3069\u3067\u5f15\u304d\u5ef6\u3070\u3059 *\/\n  align-self: stretch; \/* Flexbox\u30ec\u30a4\u30a2\u30a6\u30c8\u6642\u306b\u6709\u52b9 *\/\n}\n\n.toc {\n  position: sticky;\n  top: 80px;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">bottom \/ left \/ right \u3067\u306e\u56fa\u5b9a<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u306f <code>top<\/code> \u3060\u3051\u3067\u306a\u304f <code>bottom<\/code>\u30fb<code>left<\/code>\u30fb<code>right<\/code> \u3067\u3082\u4f7f\u3048\u307e\u3059\u3002<code>bottom: 0<\/code> \u306b\u3059\u308b\u3068\u3001\u8981\u7d20\u304c\u753b\u9762\u4e0b\u7aef\u306b\u5230\u9054\u3057\u305f\u3089\u56fa\u5b9a\u3055\u308c\u307e\u3059\u3002\u30da\u30fc\u30b8\u4e0b\u90e8\u306eCTA\u30d0\u30ca\u30fc\u3084\u300c\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u300d\u30dc\u30bf\u30f3\u3092 sticky \u3067\u5b9f\u73fe\u3057\u305f\u3044\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u5217\u3092\u56fa\u5b9a\u3057\u305f\u3044\u5834\u5408\u306f <code>left: 0<\/code> \u3084 <code>right: 0<\/code> \u3092\u4f7f\u3044\u307e\u3059\u3002\u5b9f\u969b\u306b\u306f <code>top<\/code> \u3092\u4f7f\u3046\u30b1\u30fc\u30b9\u304c\u5727\u5012\u7684\u306b\u591a\u3044\u3067\u3059\u304c\u3001\u3053\u308c\u3089\u306e\u7d44\u307f\u5408\u308f\u305b\u3082\u899a\u3048\u3066\u304a\u304f\u3068\u5fdc\u7528\u304c\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u753b\u9762\u4e0b\u7aef\u306b\u8ffd\u5f93\u3055\u305b\u308b\u5834\u5408 *\/\n.sticky-footer-bar {\n  position: sticky;\n  bottom: 0;\n}\n\n\/* \u30c6\u30fc\u30d6\u30eb\u306e\u5de6\u7aef\u5217\u3092\u56fa\u5b9a\u3059\u308b\u5834\u5408 *\/\n.table-first-col {\n  position: sticky;\n  left: 0;\n  background: #fff; \/* \u80cc\u666f\u8272\u3092\u6307\u5b9a\u3057\u306a\u3044\u3068\u900f\u3051\u3066\u898b\u3048\u308b *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u8ffd\u5f93\u30d8\u30c3\u30c0\u30fc\uff08\u30da\u30fc\u30b8\u4e0a\u90e8\u306b\u30d8\u30c3\u30c0\u30fc\u3092\u56fa\u5b9a\uff09\u5b9f\u88c5<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u30b5\u30a4\u30c8\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3082\u753b\u9762\u4e0a\u90e8\u306b\u8868\u793a\u3057\u7d9a\u3051\u308b\u306e\u304c\u300c\u8ffd\u5f93\u30d8\u30c3\u30c0\u30fc\u300d\u3067\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30da\u30fc\u30b8\u306e\u3069\u3053\u306b\u3044\u3066\u3082\u3001\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3078\u3059\u3050\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u305f\u3081UX\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002position: sticky \u3092\u4f7f\u3048\u3070\u3001JavaScript\u306a\u3057\u3067\u30b7\u30f3\u30d7\u30eb\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057 sticky \u30d8\u30c3\u30c0\u30fc\u306f\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u8868\u793a\u9762\u7a4d\u3092\u5e38\u306b\u6e1b\u3089\u3059\u305f\u3081\u3001\u9ad8\u3055\u306f\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u3067\u306f\u753b\u9762\u306e\u7e26\u5e45\u304c\u9650\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f\u7d30\u3081\uff0850px \u524d\u5f8c\uff09\u306e\u30d8\u30c3\u30c0\u30fc\u306b\u3059\u308b\u8a2d\u8a08\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u6700\u5c0f\u69cb\u6210\u306eHTML\u3068CSS<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;header class=\"site-header\"&gt;\n  &lt;div class=\"header-inner\"&gt;\n    &lt;a href=\"\/\" class=\"logo\"&gt;\u30b5\u30a4\u30c8\u540d&lt;\/a&gt;\n    &lt;nav class=\"global-nav\"&gt;\n      &lt;ul&gt;\n        &lt;li&gt;&lt;a href=\"\/about\/\"&gt;About&lt;\/a&gt;&lt;\/li&gt;\n        &lt;li&gt;&lt;a href=\"\/works\/\"&gt;Works&lt;\/a&gt;&lt;\/li&gt;\n        &lt;li&gt;&lt;a href=\"\/contact\/\"&gt;Contact&lt;\/a&gt;&lt;\/li&gt;\n      &lt;\/ul&gt;\n    &lt;\/nav&gt;\n  &lt;\/div&gt;\n&lt;\/header&gt;\n\n&lt;main&gt;\n  &lt;!-- \u30da\u30fc\u30b8\u672c\u6587 --&gt;\n&lt;\/main&gt;\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.site-header {\n  position: sticky;\n  top: 0;\n  z-index: 100; \/* \u30b3\u30f3\u30c6\u30f3\u30c4\u3088\u308a\u624b\u524d\u306b\u8868\u793a *\/\n  background: #fff;\n  border-bottom: 1px solid #e0e0e0;\n  width: 100%;\n}\n\n.header-inner {\n  max-width: 1200px;\n  margin: 0 auto;\n  padding: 0 16px;\n  height: 60px;\n  display: flex;\n  align-items: center;\n  justify-content: space-between;\n}\n\n.global-nav ul {\n  list-style: none;\n  margin: 0;\n  padding: 0;\n  display: flex;\n  gap: 24px;\n}\n\n.global-nav a {\n  text-decoration: none;\n  color: #333;\n  font-size: 0.9rem;\n}\n<\/code><\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30a4\u30f3\u30c8\u306f <code>z-index: 100<\/code> \u3068 <code>background: #fff<\/code> \u306e2\u3064\u3067\u3059\u3002z-index \u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u30d8\u30c3\u30c0\u30fc\u306e\u4e0a\u306b\u91cd\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f background-color \u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u3001\u30d8\u30c3\u30c0\u30fc\u304c\u534a\u900f\u660e\u306b\u306a\u3063\u3066\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u900f\u3051\u3066\u898b\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u5fc5\u305a\u4e21\u65b9\u30bb\u30c3\u30c8\u3067\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306b\u5f71\u3092\u3064\u3051\u3066\u30d8\u30c3\u30c0\u30fc\u3092\u5f37\u8abf\u3059\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u59cb\u307e\u308b\u3068\u30d8\u30c3\u30c0\u30fc\u306b\u5f71\u304c\u4ed8\u304f\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u306e\u5883\u754c\u304c\u660e\u78ba\u306b\u306a\u308aUX\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u30da\u30fc\u30b8\u6700\u4e0a\u90e8\u3067\u306f\u30d8\u30c3\u30c0\u30fc\u3068\u30da\u30fc\u30b8\u80cc\u666f\u304c\u4e00\u4f53\u306b\u898b\u3048\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u59cb\u3081\u308b\u3068\u5f71\u304c\u73fe\u308c\u3066\u30d8\u30c3\u30c0\u30fc\u304c\u300c\u6d6e\u304d\u4e0a\u304c\u308b\u300d\u3088\u3046\u306a\u6f14\u51fa\u306b\u306a\u308a\u307e\u3059\u3002JavaScript\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u3092\u691c\u77e5\u3057\u3066\u30af\u30e9\u30b9\u3092\u4ed8\u3051\u5916\u3057\u3059\u308b\u65b9\u6cd5\u304c\u4e00\u822c\u7684\u3067\u3059\u3002CSS\u306e <code>position: sticky<\/code> \u3060\u3051\u3067\u306f\u300c\u56fa\u5b9a\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u300d\u3092\u691c\u77e5\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u90e8\u5206\u3060\u3051\u306fJavaScript\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.site-header {\n  position: sticky;\n  top: 0;\n  z-index: 100;\n  background: #fff;\n  transition: box-shadow 0.3s ease;\n}\n\n\/* JavaScript\u3067\u4ed8\u4e0e\u3059\u308b\u30af\u30e9\u30b9 *\/\n.site-header.is-scrolled {\n  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);\n}\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;script&gt;\nconst header = document.querySelector('.site-header');\nwindow.addEventListener('scroll', () => {\n  if (window.scrollY &gt; 0) {\n    header.classList.add('is-scrolled');\n  } else {\n    header.classList.remove('is-scrolled');\n  }\n});\n&lt;\/script&gt;\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u5bfe\u5fdc\uff08\u30e1\u30cb\u30e5\u30fc\u30dc\u30bf\u30f3\u4ed8\u304d\uff09<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3067\u306f\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3092\u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30e1\u30cb\u30e5\u30fc\u306b\u5207\u308a\u66ff\u3048\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u306f\u5f15\u304d\u7d9a\u304d sticky \u3067\u56fa\u5b9a\u3057\u307e\u3059\u3002PC\u7528\u306e\u30ca\u30d3\u3092\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3067\u975e\u8868\u793a\u306b\u3057\u3001\u4ee3\u308f\u308a\u306b\u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30dc\u30bf\u30f3\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u30dc\u30bf\u30f3\u30af\u30ea\u30c3\u30af\u3067\u30e1\u30cb\u30e5\u30fc\u3092\u958b\u9589\u3059\u308b\u52d5\u304d\u306fJavaScript\u304c\u5fc5\u8981\u3067\u3059\u304c\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u8ffd\u5f93\u81ea\u4f53\u306fCSS\u306e\u307f\u3067\u52d5\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>@media (max-width: 640px) {\n  .global-nav {\n    display: none; \/* PC\u7528\u30ca\u30d3\u3092\u975e\u8868\u793a *\/\n  }\n\n  .menu-toggle {\n    display: block; \/* \u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30dc\u30bf\u30f3\u3092\u8868\u793a *\/\n  }\n\n  \/* \u30e1\u30cb\u30e5\u30fcopen\u6642 *\/\n  .global-nav.is-open {\n    display: block;\n    position: fixed;\n    top: 60px;\n    left: 0;\n    width: 100%;\n    background: #fff;\n    padding: 16px;\n    border-top: 1px solid #e0e0e0;\n    z-index: 99;\n  }\n\n  .global-nav.is-open ul {\n    flex-direction: column;\n    gap: 16px;\n  }\n}\n<\/code><\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u30b5\u30a4\u30c9\u306e\u76ee\u6b21\uff08\u3082\u304f\u3058\uff09\u3092\u8ffd\u5f93\u3055\u305b\u308b\u5b9f\u88c5<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u30d6\u30ed\u30b0\u8a18\u4e8b\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30da\u30fc\u30b8\u3067\u3088\u304f\u898b\u304b\u3051\u308b\u300c\u30b5\u30a4\u30c9\u30d0\u30fc\u306e\u76ee\u6b21\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u8ffd\u3044\u304b\u3051\u3066\u304f\u308b\u300d\u52d5\u304d\u3082\u3001position: sticky \u3067\u5b9f\u88c5\u3067\u304d\u307e\u3059\u30022\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u524d\u63d0\u306b\u306a\u308a\u307e\u3059\u3002\u5de6\u5074\u306b\u8a18\u4e8b\u672c\u6587\u3001\u53f3\u5074\u306b\u30b5\u30a4\u30c9\u30d0\u30fc\u76ee\u6b21\u3092\u914d\u7f6e\u3057\u3001\u30b5\u30a4\u30c9\u30d0\u30fc\u5185\u306e\u76ee\u6b21\u306b sticky \u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u8a18\u4e8b\u672c\u6587\u304c\u9577\u3044\u307b\u3069sticky\u304c\u6709\u52b9\u306a\u533a\u9593\u304c\u9577\u304f\u306a\u308a\u3001\u5feb\u9069\u306b\u4f7f\u3048\u308b\u76ee\u6b21\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u3053\u306e\u5b9f\u88c5\u3067\u306f\u89aa\u30b3\u30f3\u30c6\u30ca\u306e\u8a2d\u5b9a\u304c\u91cd\u8981\u3067\u3059\u3002\u30b5\u30a4\u30c9\u30d0\u30fc\u306e\u89aa\u8981\u7d20\uff082\u30ab\u30e9\u30e0\u3092\u675f\u306d\u308b\u30b3\u30f3\u30c6\u30ca\uff09\u304c\u3001\u8a18\u4e8b\u672c\u6587\u3068\u540c\u3058\u9ad8\u3055\u306b\u306a\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u3001\u30b5\u30a4\u30c9\u30d0\u30fc\u306e sticky \u304c\u65e9\u3005\u306b\u89e3\u9664\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002Flexbox \u306e\u5834\u5408\u3001<code>align-items: flex-start<\/code> \u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u9375\u306b\u306a\u308a\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306e <code>align-items: stretch<\/code> \u3060\u3068\u3001\u30b5\u30a4\u30c9\u30d0\u30fc\u304c\u672c\u6587\u3068\u540c\u3058\u9ad8\u3055\u306b\u5f15\u304d\u4f38\u3070\u3055\u308c\u3066 sticky \u304c\u52b9\u304b\u306a\u304f\u306a\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8a18\u4e8b\u672c\u6587\u30b3\u30f3\u30c6\u30ca\u306e\u9ad8\u3055\u3068\u6574\u5408\u3055\u305b\u308b\u305f\u3081\u306b <code>flex-start<\/code> \u3092\u6307\u5b9a\u3057\u3066\u304a\u304f\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">2\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u57fa\u672c\u69cb\u9020<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;div class=\"page-layout\"&gt;\n\n  &lt;main class=\"main-content\"&gt;\n    &lt;h1&gt;\u8a18\u4e8b\u30bf\u30a4\u30c8\u30eb&lt;\/h1&gt;\n    &lt;p&gt;\u672c\u6587\u306e\u5185\u5bb9...\uff08\u3053\u3053\u304c\u9577\u3044\u3068 sticky \u304c\u52b9\u304f\u7bc4\u56f2\u304c\u5e83\u304c\u308b\uff09&lt;\/p&gt;\n    &lt;h2 id=\"section-1\"&gt;\u898b\u51fa\u30571&lt;\/h2&gt;\n    &lt;p&gt;...&lt;\/p&gt;\n    &lt;h2 id=\"section-2\"&gt;\u898b\u51fa\u30572&lt;\/h2&gt;\n    &lt;p&gt;...&lt;\/p&gt;\n  &lt;\/main&gt;\n\n  &lt;aside class=\"sidebar\"&gt;\n    &lt;nav class=\"toc\"&gt;\n      &lt;h3&gt;\u76ee\u6b21&lt;\/h3&gt;\n      &lt;ul&gt;\n        &lt;li&gt;&lt;a href=\"#section-1\"&gt;\u898b\u51fa\u30571&lt;\/a&gt;&lt;\/li&gt;\n        &lt;li&gt;&lt;a href=\"#section-2\"&gt;\u898b\u51fa\u30572&lt;\/a&gt;&lt;\/li&gt;\n      &lt;\/ul&gt;\n    &lt;\/nav&gt;\n  &lt;\/aside&gt;\n\n&lt;\/div&gt;\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.page-layout {\n  display: flex;\n  gap: 40px;\n  align-items: flex-start; \/* \u3053\u308c\u304c\u91cd\u8981\uff01 *\/\n  max-width: 1100px;\n  margin: 0 auto;\n  padding: 40px 16px;\n}\n\n.main-content {\n  flex: 1;\n  min-width: 0; \/* \u30c6\u30ad\u30b9\u30c8\u306e\u306f\u307f\u51fa\u3057\u9632\u6b62 *\/\n}\n\n.sidebar {\n  width: 280px;\n  flex-shrink: 0;\n}\n\n.toc {\n  position: sticky;\n  top: 80px; \/* \u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055 + \u4f59\u767d *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u76ee\u6b21\u306e\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u6b21\u306e\u30d3\u30b8\u30e5\u30a2\u30eb\u3092\u6574\u3048\u308b\u3068\u3001\u8a18\u4e8b\u5168\u4f53\u306e\u8aad\u307f\u3084\u3059\u3055\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u30ab\u30fc\u30c9\u98a8\u306e\u30c7\u30b6\u30a4\u30f3\u306b\u3057\u3066\u8a18\u4e8b\u672c\u6587\u3068\u8996\u899a\u7684\u306b\u533a\u5225\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u5de6\u30dc\u30fc\u30c0\u30fc\u3067\u30a2\u30af\u30bb\u30f3\u30c8\u30ab\u30e9\u30fc\u3092\u6dfb\u3048\u308b\u3068\u30d6\u30e9\u30f3\u30c9\u306e\u7d71\u4e00\u611f\u304c\u51fa\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.toc {\n  position: sticky;\n  top: 80px;\n  background: #f8f8f8;\n  border-radius: 8px;\n  padding: 20px;\n  border-left: 4px solid #d16176;\n}\n\n.toc h3 {\n  font-size: 0.85rem;\n  color: #888;\n  letter-spacing: 0.05em;\n  text-transform: uppercase;\n  margin: 0 0 12px;\n}\n\n.toc ul {\n  list-style: none;\n  margin: 0;\n  padding: 0;\n}\n\n.toc li {\n  padding: 4px 0;\n}\n\n.toc a {\n  text-decoration: none;\n  color: #333;\n  font-size: 0.9rem;\n  line-height: 1.6;\n  transition: color 0.2s;\n}\n\n.toc a:hover {\n  color: #d16176;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u5fdc\u3058\u3066\u73fe\u5728\u5730\u306e\u76ee\u6b21\u9805\u76ee\u3092\u30cf\u30a4\u30e9\u30a4\u30c8\u3059\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Intersection Observer API \u3092\u4f7f\u3046\u3068\u3001\u73fe\u5728\u753b\u9762\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u898b\u51fa\u3057\u306b\u5bfe\u5fdc\u3059\u308b\u76ee\u6b21\u9805\u76ee\u3092\u81ea\u52d5\u3067\u30cf\u30a4\u30e9\u30a4\u30c8\u3067\u304d\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u8a18\u4e8b\u306e\u3069\u3053\u3092\u8aad\u3093\u3067\u3044\u308b\u304b\u304c\u4e00\u76ee\u3067\u308f\u304b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u3067\u76e3\u8996\u3059\u308b\u5f93\u6765\u306e\u65b9\u6cd5\u3088\u308a\u3001Intersection Observer \u306f\u51e6\u7406\u304c\u8efd\u304f\u5b9f\u88c5\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002<code>rootMargin<\/code> \u306e\u5024\u3067\u300c\u3069\u306e\u4f4d\u7f6e\u306b\u6765\u305f\u3089\u30a2\u30af\u30c6\u30a3\u30d6\u3068\u307f\u306a\u3059\u304b\u300d\u3092\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;script&gt;\nconst headings = document.querySelectorAll('h2[id], h3[id]');\nconst tocLinks = document.querySelectorAll('.toc a');\n\nconst observer = new IntersectionObserver((entries) => {\n  entries.forEach(entry =&gt; {\n    if (entry.isIntersecting) {\n      tocLinks.forEach(link =&gt; link.classList.remove('is-active'));\n      const activeLink = document.querySelector(`.toc a[href=\"#${entry.target.id}\"]`);\n      if (activeLink) activeLink.classList.add('is-active');\n    }\n  });\n}, { rootMargin: '-80px 0px -60% 0px' });\n\nheadings.forEach(h =&gt; observer.observe(h));\n&lt;\/script&gt;\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.toc a.is-active {\n  color: #d16176;\n  font-weight: bold;\n}\n<\/code><\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u30c6\u30fc\u30d6\u30eb\u306e\u898b\u51fa\u3057\u884c\uff08thead\uff09\u3092\u56fa\u5b9a\u3059\u308b<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u884c\u6570\u306e\u591a\u3044\u30c7\u30fc\u30bf\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u3068\u30d8\u30c3\u30c0\u30fc\u884c\u304c\u898b\u3048\u306a\u304f\u306a\u3063\u3066\u300c\u3053\u306e\u5217\u306f\u4f55\u306e\u30c7\u30fc\u30bf\u3060\u3063\u305f\u304b\u300d\u304c\u308f\u304b\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002<code>thead th<\/code> \u306b sticky \u3092\u9069\u7528\u3059\u308b\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u3092\u7e26\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3082\u30d8\u30c3\u30c0\u30fc\u884c\u304c\u753b\u9762\u4e0a\u90e8\u306b\u56fa\u5b9a\u3055\u308c\u307e\u3059\u3002Excel\u306e\u300c\u5148\u982d\u884c\u3092\u56fa\u5b9a\u300d\u3068\u540c\u3058\u52d5\u304d\u3092CSS\u3060\u3051\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u3067\u306e sticky \u306b\u306f\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<code>thead<\/code> \u3084 <code>tr<\/code> \u305d\u306e\u3082\u306e\u306b sticky \u3092\u9069\u7528\u3057\u3066\u3082\u52b9\u304b\u306a\u3044\u30d6\u30e9\u30a6\u30b6\u304c\u3042\u308a\u307e\u3059\u3002\u5fc5\u305a <code>th<\/code>\uff08\u307e\u305f\u306f <code>td<\/code>\uff09\u306b\u9069\u7528\u3059\u308b\u306e\u304c\u6b63\u3057\u3044\u65b9\u6cd5\u3067\u3059\u3002\u307e\u305f\u3001\u80cc\u666f\u8272\u306e\u6307\u5b9a\u3092\u5fd8\u308c\u308b\u3068\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306btbody\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u304cthead\u306e\u4e0b\u306b\u900f\u3051\u3066\u898b\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u306e2\u70b9\u306f\u7279\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u672c\u5b9f\u88c5<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;div class=\"table-wrapper\"&gt;\n  &lt;table class=\"data-table\"&gt;\n    &lt;thead&gt;\n      &lt;tr&gt;\n        &lt;th&gt;\u5546\u54c1\u540d&lt;\/th&gt;\n        &lt;th&gt;\u4fa1\u683c&lt;\/th&gt;\n        &lt;th&gt;\u5728\u5eab&lt;\/th&gt;\n        &lt;th&gt;\u30ab\u30c6\u30b4\u30ea&lt;\/th&gt;\n      &lt;\/tr&gt;\n    &lt;\/thead&gt;\n    &lt;tbody&gt;\n      &lt;tr&gt;\n        &lt;td&gt;\u5546\u54c1A&lt;\/td&gt;\n        &lt;td&gt;\u00a51,000&lt;\/td&gt;\n        &lt;td&gt;50&lt;\/td&gt;\n        &lt;td&gt;\u98df\u54c1&lt;\/td&gt;\n      &lt;\/tr&gt;\n      &lt;!-- \u884c\u304c\u7d9a\u304f --&gt;\n    &lt;\/tbody&gt;\n  &lt;\/table&gt;\n&lt;\/div&gt;\n<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.table-wrapper {\n  max-height: 400px; \/* \u30c6\u30fc\u30d6\u30eb\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u7bc4\u56f2\u3092\u5236\u9650 *\/\n  overflow-y: auto;  \/* \u7e26\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u6709\u52b9\u5316 *\/\n}\n\n.data-table {\n  width: 100%;\n  border-collapse: collapse;\n}\n\n.data-table thead th {\n  position: sticky;\n  top: 0;\n  background: #51322b;  \/* \u80cc\u666f\u8272\u306f\u5fc5\u9808 *\/\n  color: #fff;\n  padding: 12px 16px;\n  text-align: left;\n  z-index: 1;\n}\n\n.data-table tbody td {\n  padding: 10px 16px;\n  border-bottom: 1px solid #e0e0e0;\n}\n\n.data-table tbody tr:hover {\n  background: #fdf0f0;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u30da\u30fc\u30b8\u5168\u4f53\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u30c6\u30fc\u30d6\u30eb\uff08table-wrapper \u306a\u3057\uff09<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30c6\u30fc\u30d6\u30eb\u3092\u30da\u30fc\u30b8\u5168\u4f53\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u4f7f\u3046\u5834\u5408\uff08table-wrapper \u306b overflow \u3092\u8a2d\u5b9a\u3057\u306a\u3044\u5834\u5408\uff09\u3067\u3082\u3001<code>thead th<\/code> \u306b sticky \u3092\u9069\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306f\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u306a\u308a\u307e\u3059\u3002top \u306e\u5024\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u306b\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3001\u3053\u3053\u304c\u305a\u308c\u308b\u3068\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u306bthead\u304c\u96a0\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30da\u30fc\u30b8\u5168\u4f53\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5834\u5408 *\/\n.data-table thead th {\n  position: sticky;\n  top: 60px; \/* \u30b0\u30ed\u30fc\u30d0\u30eb\u30d8\u30c3\u30c0\u30fc\u304c60px\u306e\u5834\u5408 *\/\n  background: #fff;\n  z-index: 10;\n  border-bottom: 2px solid #d16176;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u5de6\u7aef\u306e\u5217\u3092\u56fa\u5b9a\u3059\u308b\uff08\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30c6\u30fc\u30d6\u30eb\uff09<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u6a2a\u65b9\u5411\u306b\u5217\u6570\u304c\u591a\u3044\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001\u5de6\u7aef\u306e\u300c\u9805\u76ee\u540d\u300d\u5217\u3092\u56fa\u5b9a\u3057\u305f\u3044\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<code>position: sticky<\/code> \u3068 <code>left: 0<\/code> \u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u7e26\u30b9\u30af\u30ed\u30fc\u30eb\u306ethead\u56fa\u5b9a\u3068\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5217\u56fa\u5b9a\u3092\u540c\u6642\u306b\u4f7f\u3046\u3053\u3068\u3082\u3067\u304d\u3001\u305d\u306e\u5834\u5408\u306f z-index \u306e\u7ba1\u7406\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.table-wrapper {\n  overflow-x: auto; \/* \u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u6709\u52b9\u5316 *\/\n}\n\n\/* \u5148\u982d\u5217\uff08th\u30fbtd \u3069\u3061\u3089\u3082\uff09\u3092\u56fa\u5b9a *\/\n.data-table th:first-child,\n.data-table td:first-child {\n  position: sticky;\n  left: 0;\n  background: #fff;\n  z-index: 1;\n  box-shadow: 2px 0 4px rgba(0, 0, 0, 0.08);\n}\n\n\/* \u30d8\u30c3\u30c0\u30fc\u884c\u304b\u3064\u5148\u982d\u5217 *\/\n.data-table thead th:first-child {\n  z-index: 2; \/* \u4ed6\u306esticky\u3088\u308a\u624b\u524d\u306b *\/\n  background: #51322b;\n}\n<\/code><\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">position: sticky\u304c\u52b9\u304b\u306a\u30447\u3064\u306e\u539f\u56e0\u3068\u5bfe\u51e6<\/h2>\n\n\n<p class=\"wp-block-paragraph\">\u300cposition: sticky \u3092\u66f8\u3044\u305f\u306e\u306b\u56fa\u5b9a\u3055\u308c\u306a\u3044\u300d\u3068\u3044\u3046\u30c8\u30e9\u30d6\u30eb\u306b\u306f\u3001\u307b\u307c\u5fc5\u305a\u539f\u56e0\u304c\u3042\u308a\u307e\u3059\u3002\u300c\u30d6\u30e9\u30a6\u30b6\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u306e\u304b\u3082\u300d\u3068\u7591\u3046\u524d\u306b\u3001\u4ee5\u4e0b\u306e7\u3064\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4e0a\u304b\u3089\u9806\u756a\u306b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307b\u3068\u3093\u3069\u306e\u30b1\u30fc\u30b9\u306f\u3053\u3053\u3067\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u539f\u56e01\uff1atop \/ bottom \/ left \/ right \u3092\u6307\u5b9a\u3057\u3066\u3044\u306a\u3044<\/h3>\n\n\n<p class=\"wp-block-paragraph\">position: sticky \u306f <code>top<\/code>\u30fb<code>bottom<\/code>\u30fb<code>left<\/code>\u30fb<code>right<\/code> \u306e\u3044\u305a\u308c\u304b\u3092\u5fc5\u305a\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6307\u5b9a\u3057\u306a\u3044\u3068 sticky \u306f\u6709\u52b9\u306b\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u6700\u3082\u591a\u3044\u30df\u30b9\u3067\u3059\u3002\u300c\u56fa\u5b9a\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u610f\u56f3\u3060\u3051\u3067 <code>position: sticky<\/code> \u3068\u66f8\u3044\u3066\u3057\u307e\u3044\u3001<code>top<\/code> \u3092\u5fd8\u308c\u308b\u30b1\u30fc\u30b9\u304c\u975e\u5e38\u306b\u591a\u3044\u306e\u3067\u3001\u30bb\u30c3\u30c8\u3067\u899a\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\uff1atop\u306a\u3057\u306f\u52d5\u304b\u306a\u3044 *\/\n.sticky {\n  position: sticky;\n}\n\n\/* OK\uff1atop\u3092\u5fc5\u305a\u6307\u5b9a\u3059\u308b *\/\n.sticky {\n  position: sticky;\n  top: 0;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e02\uff1a\u89aa\u8981\u7d20\u306b overflow: hidden \/ auto \/ scroll \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u8981\u7d20\u306e\u7956\u5148\u8981\u7d20\u306e\u3044\u305a\u308c\u304b\u306b <code>overflow: hidden<\/code>\u30fb<code>overflow: auto<\/code>\u30fb<code>overflow: scroll<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u3001\u305d\u306e\u8981\u7d20\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306b\u306a\u308a\u307e\u3059\u3002sticky \u306f\u305d\u306e\u30b3\u30f3\u30c6\u30ca\u3092\u57fa\u6e96\u306b\u52d5\u3053\u3046\u3068\u3057\u307e\u3059\u304c\u3001\u591a\u304f\u306e\u5834\u5408\u305d\u306e\u30b3\u30f3\u30c6\u30ca\u306f\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u3088\u308a\u5c0f\u3055\u304f\u3001sticky \u304c\u610f\u56f3\u901a\u308a\u306b\u52d5\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u306f2\u756a\u76ee\u306b\u591a\u3044\u539f\u56e0\u3067\u3059\u3002<\/p>\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u300cclearfix \u306e\u305f\u3081\u306b <code>overflow: hidden<\/code> \u3092\u66f8\u3044\u3066\u3044\u305f\u300d\u300c\u6a2a\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u9632\u3050\u305f\u3081\u306b\u66f8\u3044\u3066\u3044\u305f\u300d\u3068\u3044\u3046\u30b1\u30fc\u30b9\u3067\u8d77\u304d\u3084\u3059\u3044\u3067\u3059\u3002\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067\u89aa\u8981\u7d20\u3092\u4e00\u3064\u305a\u3064\u78ba\u8a8d\u3057\u3066\u3001overflow \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u539f\u56e0\uff1a\u3069\u3053\u304b\u306e\u7956\u5148\u306b\u3053\u308c\u304c\u3042\u308b *\/\n.wrapper {\n  overflow: hidden; \/* \u2190 \u3053\u308c\u304c sticky \u3092\u6bba\u3059 *\/\n}\n\n\/* \u5bfe\u51e6\uff1aoverflow:hidden \u3092\u524a\u9664\u3059\u308b\u304b\u3001visible \u306b\u5909\u3048\u308b *\/\n.wrapper {\n  overflow: visible;\n}\n\n\/* \u6a2a\u306f\u307f\u51fa\u3057\u3060\u3051\u96a0\u3057\u305f\u3044\u5834\u5408\u306f overflow-x: clip \u3092\u4f7f\u3046 *\/\n.wrapper {\n  overflow-x: clip; \/* \u7e26\u65b9\u5411\u306esticky\u306b\u306f\u5f71\u97ff\u3057\u306b\u304f\u3044 *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e03\uff1a\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u304c sticky \u8981\u7d20\u3088\u308a\u5927\u304d\u304f\u306a\u3044<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u306f\u89aa\u8981\u7d20\u306e\u7bc4\u56f2\u5185\u3067\u306e\u307f\u56fa\u5b9a\u3055\u308c\u307e\u3059\u3002\u89aa\u8981\u7d20\u304c sticky \u8981\u7d20\u3068\u540c\u3058\u9ad8\u3055\u3057\u304b\u306a\u3044\u5834\u5408\u3001\u56fa\u5b9a\u3067\u304d\u308b\u300c\u4f59\u5730\u300d\u304c\u30bc\u30ed\u306e\u305f\u3081\u52d5\u304d\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u89aa\u304c\u9ad8\u3055\u56fa\u5b9a\u306e\u5c0f\u3055\u3044 div \u3067\u3001\u305d\u306e\u4e2d\u306b sticky \u3092\u5165\u308c\u3066\u3044\u308b\u5834\u5408\u304c\u3053\u308c\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002\u300c\u753b\u9762\u5185\u306b\u53ce\u307e\u308b\u5c0f\u3055\u3044\u30b3\u30f3\u30c6\u30ca\u300d\u306b sticky \u3092\u5165\u308c\u3066\u3082\u610f\u5473\u304c\u306a\u3044\u306e\u3067\u3001\u69cb\u9020\u3092\u898b\u76f4\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\uff1a\u89aa\u304c100px\u3001\u5b50\u3082100px \u2192 \u52d5\u304f\u4f59\u5730\u304c\u306a\u3044 *\/\n.parent {\n  height: 100px;\n}\n.child {\n  position: sticky;\n  top: 0;\n  height: 100px;\n}\n\n\/* OK\uff1a\u89aa\u3092\u5927\u304d\u304f\u3059\u308b\u304b\u3001\u9ad8\u3055\u3092 height: auto \u306b\u3059\u308b *\/\n.parent {\n  height: auto; \/* \u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u5fdc\u3058\u3066\u4f38\u3073\u308b *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e04\uff1adisplay: flex \u306e align-items \u304c stretch \u306b\u306a\u3063\u3066\u3044\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Flexbox \u306e\u30b3\u30f3\u30c6\u30ca\u3067 <code>align-items: stretch<\/code>\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\uff09\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001flex \u30a2\u30a4\u30c6\u30e0\u306e\u9ad8\u3055\u304c\u30b3\u30f3\u30c6\u30ca\u5168\u4f53\u3068\u540c\u3058\u9ad8\u3055\u306b\u5f15\u304d\u4f38\u3070\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u3068\u304d sticky \u8981\u7d20\u306e\u9ad8\u3055\u3068\u89aa\u306e\u9ad8\u3055\u304c\u540c\u3058\u306b\u306a\u308a\u3001\u56fa\u5b9a\u3067\u304d\u308b\u4f59\u5730\u304c\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u554f\u984c\u304c\u51fa\u308b\u30d1\u30bf\u30fc\u30f3 *\/\n.flex-container {\n  display: flex;\n  align-items: stretch; \/* \u30c7\u30d5\u30a9\u30eb\u30c8\u5024 *\/\n}\n\n\/* sticky \u3092\u4f7f\u3046\u5074\u306e\u30b3\u30f3\u30c6\u30ca\u306f flex-start \u3092\u63a8\u5968 *\/\n.flex-container {\n  display: flex;\n  align-items: flex-start;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e05\uff1adisplay: grid \u3067 align-self \u304c stretch \u306b\u306a\u3063\u3066\u3044\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Grid \u30ec\u30a4\u30a2\u30a6\u30c8\u3067\u3082\u540c\u69d8\u306e\u554f\u984c\u304c\u8d77\u304d\u307e\u3059\u3002\u30b0\u30ea\u30c3\u30c9\u30a2\u30a4\u30c6\u30e0\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u9ad8\u3055\u304c\u884c\u5168\u4f53\u306b\u5f15\u304d\u5ef6\u3070\u3055\u308c\u307e\u3059\uff08<code>align-self: stretch<\/code>\uff09\u3002sticky \u3092\u4f7f\u3044\u305f\u3044\u30b0\u30ea\u30c3\u30c9\u30a2\u30a4\u30c6\u30e0\u306b\u306f <code>align-self: start<\/code> \u3092\u8a2d\u5b9a\u3057\u3066\u3001\u81ea\u8eab\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u9ad8\u3055\u306b\u7559\u307e\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* sticky \u3092\u5165\u308c\u308b\u30b0\u30ea\u30c3\u30c9\u30a2\u30a4\u30c6\u30e0\u81ea\u8eab\u306b align-self \u3092\u8a2d\u5b9a *\/\n.sidebar {\n  align-self: start; \/* stretch \u304b\u3089 start \u306b\u5909\u3048\u308b *\/\n}\n\n.toc {\n  position: sticky;\n  top: 80px;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e06\uff1a\u30c6\u30fc\u30d6\u30eb\u3067 thead \u3084 tr \u306b\u9069\u7528\u3057\u3066\u3044\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30c6\u30fc\u30d6\u30eb\u306e <code>thead<\/code> \u3084 <code>tr<\/code> \u306b sticky \u3092\u76f4\u63a5\u9069\u7528\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u3001\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u306f <code>display: table-header-group<\/code> \u306a\u3069\u306e\u5185\u90e8 display \u304c\u4e0a\u66f8\u304d\u3055\u308c\u3066\u52b9\u304b\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002sticky \u3092\u52b9\u304b\u305b\u308b\u306b\u306f <code>th<\/code> \u307e\u305f\u306f <code>td<\/code> \u306b\u9069\u7528\u3059\u308b\u306e\u304c\u6b63\u3057\u3044\u65b9\u6cd5\u3067\u3059\u3002\u8981\u7d20\u306e\u968e\u5c64\u3092\u4e00\u6bb5\u4e0b\u3052\u308b\u3060\u3051\u3067\u52d5\u304f\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\uff1athead \u306b sticky \u306f\u52b9\u304b\u306a\u3044\u30d6\u30e9\u30a6\u30b6\u304c\u3042\u308b *\/\nthead {\n  position: sticky;\n  top: 0;\n}\n\n\/* OK\uff1ath \u306b\u9069\u7528\u3059\u308b *\/\nthead th {\n  position: sticky;\n  top: 0;\n  background: #fff;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u539f\u56e07\uff1az-index \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u304a\u3089\u305a\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4e0b\u306b\u96a0\u308c\u308b<\/h3>\n\n\n<p class=\"wp-block-paragraph\">sticky \u81ea\u4f53\u306f\u52d5\u3044\u3066\u3044\u308b\u304c\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306b\u4ed6\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4e0b\u306b\u6f5c\u308a\u8fbc\u3093\u3067\u3057\u307e\u3046\u554f\u984c\u3067\u3059\u3002sticky \u8981\u7d20\u306f <code>z-index<\/code> \u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u91cd\u306a\u308a\u9806\u304c\u4e0d\u5b9a\u306b\u306a\u308a\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u306a\u3069\u524d\u9762\u306b\u8868\u793a\u3057\u305f\u3044\u8981\u7d20\u306b\u306f\u660e\u793a\u7684\u306b <code>z-index<\/code> \u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u80cc\u666f\u8272\u304c\u900f\u660e\u3060\u3068\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u900f\u3051\u3066\u898b\u3048\u308b\u305f\u3081\u3001<code>background-color<\/code> \u3082\u5408\u308f\u305b\u3066\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.site-header {\n  position: sticky;\n  top: 0;\n  z-index: 100; \/* \u30b3\u30f3\u30c6\u30f3\u30c4\u3088\u308a\u5927\u304d\u306a\u5024\u3092\u6307\u5b9a *\/\n  background: #fff; \/* \u80cc\u666f\u8272\u3082\u5fc5\u9808 *\/\n}\n<\/code><\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n\n<h3 class=\"wp-block-heading\">Q1. position: sticky \u306f\u3069\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u73fe\u5728\u306e\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u5168\u3066\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002Chrome\u30fbFirefox\u30fbSafari\u30fbEdge \u306e\u3044\u305a\u308c\u3082\u554f\u984c\u306a\u304f\u52d5\u4f5c\u3057\u307e\u3059\u3002Safari \u306f\u904e\u53bb\u306b <code>-webkit-sticky<\/code> \u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u304c\u5fc5\u8981\u3067\u3057\u305f\u304c\u3001\u73fe\u5728\uff08Safari 13\u4ee5\u964d\uff09\u306f\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u306a\u3057\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002Internet Explorer 11 \u306f\u975e\u5bfe\u5fdc\u3067\u3059\u304c\u30012022\u5e746\u6708\u306b IE11 \u306e\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u4e86\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u73fe\u5728\u306eWeb\u958b\u767a\u3067\u306f\u5b9f\u8cea\u7684\u306b\u5168\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u3068\u8003\u3048\u3066\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3078\u306e\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u6848\u4ef6\u3067\u306e\u307f\u3001JavaScript\u306b\u3088\u308b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u5ff5\u306e\u305f\u3081\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u4ed8\u304d\u3082\u66f8\u304f\u5834\u5408 *\/\n.sticky-element {\n  position: -webkit-sticky; \/* Safari \u5bfe\u5fdc\uff08\u5ff5\u306e\u305f\u3081\uff09 *\/\n  position: sticky;\n  top: 0;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">Q2. position: fixed \u3068\u306e\u4f7f\u3044\u5206\u3051\u306f\u3069\u3046\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u300c\u5e38\u306b\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u56fa\u5b9a\u3057\u305f\u3044\u300d\u306a\u3089 fixed\u3001\u300c\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u6d41\u308c\u306e\u4e2d\u3067\u3001\u4e00\u5b9a\u4f4d\u7f6e\u306b\u6765\u305f\u3089\u56fa\u5b9a\u3057\u305f\u3044\u300d\u306a\u3089 sticky \u3068\u3044\u3046\u4f7f\u3044\u5206\u3051\u304c\u57fa\u672c\u3067\u3059\u3002\u30e2\u30fc\u30c0\u30eb\u30c0\u30a4\u30a2\u30ed\u30b0\u3084\u753b\u9762\u53f3\u4e0b\u306e\u30c1\u30e3\u30c3\u30c8\u30dc\u30bf\u30f3\u306a\u3069\u3001\u30da\u30fc\u30b8\u4e0a\u306e\u3069\u3053\u304b\u3089\u3067\u3082\u5e38\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308bUI\u306f fixed \u304c\u9069\u5207\u3067\u3059\u3002\u8a18\u4e8b\u306e\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u76ee\u6b21\u3084\u8a18\u4e8b\u30d8\u30c3\u30c0\u30fc\u306a\u3069\u3001\u7279\u5b9a\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u9818\u57df\u5185\u3060\u3051\u306b\u95a2\u9023\u3059\u308bUI\u306f sticky \u304c\u9069\u5207\u3067\u3059\u3002sticky \u306f\u30ec\u30a4\u30a2\u30a6\u30c8\u30d5\u30ed\u30fc\u5185\u306b\u6b8b\u308b\u305f\u3081\u30ec\u30a4\u30a2\u30a6\u30c8\u5d29\u308c\u304c\u8d77\u304d\u306b\u304f\u304f\u3001\u30b9\u30da\u30fc\u30b9\u306e\u78ba\u4fdd\u3082\u81ea\u52d5\u306a\u306e\u3067\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u697d\u3067\u3059\u3002\u5b9f\u6848\u4ef6\u3067\u306f\u3001\u30b5\u30a4\u30c8\u5168\u4f53\u306e\u30d8\u30c3\u30c0\u30fc\u3067\u3082 sticky \u3092\u63a1\u7528\u3059\u308b\u30b1\u30fc\u30b9\u304c\u5897\u3048\u3066\u304a\u308a\u3001fixed \u3088\u308a\u6271\u3044\u3084\u3059\u3044\u3068\u8a55\u4fa1\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">Q3. sticky\u30d8\u30c3\u30c0\u30fc\u304c\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u30b8\u30e3\u30f3\u30d7\u5148\u3092\u96a0\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u89e3\u6c7a\u65b9\u6cd5\u306f\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">sticky \u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u3068\u3001\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u30b8\u30e3\u30f3\u30d7\u3057\u305f\u3068\u304d\u898b\u51fa\u3057\u304c\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u306b\u96a0\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u975e\u5e38\u306b\u3088\u304f\u8d77\u304d\u308b\u554f\u984c\u3067\u3059\u3002\u5bfe\u51e6\u6cd5\u306f <code>scroll-margin-top<\/code> \u307e\u305f\u306f <code>scroll-padding-top<\/code> \u3092\u4f7f\u3046\u3053\u3068\u3067\u3059\u3002<code>scroll-margin-top<\/code> \u306f\u30b8\u30e3\u30f3\u30d7\u5148\u306e\u8981\u7d20\u306b\u8a2d\u5b9a\u3057\u3001<code>scroll-padding-top<\/code> \u306f html \u8981\u7d20\u306b\u8a2d\u5b9a\u3057\u3066\u30b5\u30a4\u30c8\u5168\u4f53\u306b\u4e00\u62ec\u9069\u7528\u3067\u304d\u307e\u3059\u3002\u3069\u3061\u3089\u3082\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u5206\u3060\u3051\u30b8\u30e3\u30f3\u30d7\u4f4d\u7f6e\u3092\u4e0b\u306b\u305a\u3089\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u65b9\u6cd51\uff1a\u30b8\u30e3\u30f3\u30d7\u5148\u306e\u898b\u51fa\u3057\u306b\u8a2d\u5b9a *\/\nh2, h3 {\n  scroll-margin-top: 80px; \/* \u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u5206\u3060\u3051\u4f59\u767d\u3092\u3068\u308b *\/\n}\n\n\/* \u65b9\u6cd52\uff1ahtml \u8981\u7d20\u306b\u8a2d\u5b9a\uff08\u5168\u30a2\u30f3\u30ab\u30fc\u306b\u4e00\u62ec\u9069\u7528\uff09 *\/\nhtml {\n  scroll-padding-top: 80px;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">Q4. \u30c6\u30fc\u30d6\u30eb\u306ethead\u3092sticky\u306b\u3059\u308b\u3068\u7dda\u304c\u6d88\u3048\u305f\u308a\u4e8c\u91cd\u306b\u306a\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u306a\u305c\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\"><code>border-collapse: collapse<\/code> \u3092\u4f7f\u3063\u3066\u3044\u308b\u30c6\u30fc\u30d6\u30eb\u3067 <code>thead th<\/code> \u306b sticky \u3092\u9069\u7528\u3059\u308b\u3068\u3001\u30dc\u30fc\u30c0\u30fc\u304c\u6d88\u3048\u305f\u308a\u4e8c\u91cd\u8868\u793a\u306b\u306a\u3063\u305f\u308a\u3059\u308b\u554f\u984c\u304c\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f <code>border-collapse: collapse<\/code> \u304c sticky \u3068\u76f8\u6027\u304c\u60aa\u3044\u305f\u3081\u3067\u3059\u3002\u5bfe\u51e6\u6cd5\u306f <code>border-collapse: separate<\/code> \u306b\u5207\u308a\u66ff\u3048\u3066 <code>border-spacing: 0<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u65b9\u6cd5\u3001\u307e\u305f\u306f\u30dc\u30fc\u30c0\u30fc\u3067\u306f\u306a\u304f <code>box-shadow<\/code> \u3067\u7dda\u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5\u306e2\u3064\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u5bfe\u51e6\u6cd51\uff1aborder-collapse \u3092 separate \u306b *\/\n.data-table {\n  border-collapse: separate;\n  border-spacing: 0;\n}\n\n.data-table thead th {\n  position: sticky;\n  top: 0;\n  background: #fff;\n  border-bottom: 2px solid #d16176;\n}\n\n\/* \u5bfe\u51e6\u6cd52\uff1abox-shadow\u3067\u30dc\u30fc\u30c0\u30fc\u3092\u64ec\u4f3c\u7684\u306b\u518d\u73fe *\/\n.data-table thead th {\n  position: sticky;\n  top: 0;\n  background: #fff;\n  box-shadow: inset 0 -2px 0 #d16176;\n}\n<\/code><\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\">Q5. CSS\u30ab\u30b9\u30bf\u30e0\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3063\u3066\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u3092\u4e00\u5143\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u304c\u5909\u308f\u308b\u305f\u3073\u306b <code>top: 60px<\/code> \u3092\u3042\u3061\u3053\u3061\u3067\u66f8\u304d\u76f4\u3059\u306e\u306f\u975e\u52b9\u7387\u3067\u3059\u3002CSS \u30ab\u30b9\u30bf\u30e0\u30d7\u30ed\u30d1\u30c6\u30a3\uff08\u5909\u6570\uff09\u3092\u4f7f\u3048\u3070\u4e00\u5143\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002<code>:root<\/code> \u306b\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u3001sticky \u306e <code>top<\/code> \u5024\u3084\u30a2\u30f3\u30ab\u30fc\u30b8\u30e3\u30f3\u30d7\u306e <code>scroll-margin-top<\/code> \u3067\u53c2\u7167\u3057\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u3092\u5909\u66f4\u3059\u308b\u3068\u304d\u306f\u5909\u6570\u3092\u4e00\u304b\u6240\u66f8\u304d\u63db\u3048\u308b\u3060\u3051\u3067\u6e08\u3080\u305f\u3081\u3001\u4fdd\u5b88\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3068PC\u3067\u30d8\u30c3\u30c0\u30fc\u9ad8\u3055\u304c\u7570\u306a\u308b\u5834\u5408\u3082\u3001\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u5185\u3067\u5909\u6570\u3092\u4e0a\u66f8\u304d\u3059\u308b\u3060\u3051\u3067\u5168\u3066\u306e\u5024\u304c\u81ea\u52d5\u3067\u66f4\u65b0\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>:root {\n  --header-height: 60px;\n}\n\n@media (max-width: 640px) {\n  :root {\n    --header-height: 50px; \/* \u30b9\u30de\u30db\u3067\u306f\u30d8\u30c3\u30c0\u30fc\u3092\u5c0f\u3055\u304f *\/\n  }\n}\n\n.site-header {\n  position: sticky;\n  top: 0;\n  height: var(--header-height);\n  z-index: 100;\n}\n\n.toc {\n  position: sticky;\n  top: calc(var(--header-height) + 16px); \/* \u30d8\u30c3\u30c0\u30fc\u9ad8\u3055 + \u4f59\u767d *\/\n}\n\nh2, h3 {\n  scroll-margin-top: calc(var(--header-height) + 8px);\n}\n\nhtml {\n  scroll-padding-top: var(--header-height);\n}\n<\/code><\/pre><\/div>\n\n\n\n<!-- withmedia-related -->\n<h2 class=\"wp-block-heading\">\u95a2\u9023\u8a18\u4e8b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-absolute-relative\/\">CSS\u306eposition absolute\/relative\u5b8c\u5168\u30ac\u30a4\u30c9\u30102026\u5e74\u7248\u3011<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-scroll\/\">CSS\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30102026\u5e74\u7248\u3011JavaScript\u4e0d\u8981\u306e\u5b9f\u88c5\u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/parallax-effect\/\">\u30102026\u5e74\u6700\u65b0\u3011\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u5b8c\u5168\u30ac\u30a4\u30c9\uff5cHTML\u30fbCSS\u3067\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u521d\u5fc3\u8005\u3067\u3082\u4f5c\u308c\u308b\u5b9f\u88c5\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-flexbox-grid-guide\/\">CSS Flexbox\u3068Grid\u3092\u4f7f\u3044\u5206\u3051\u308b\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5b9f\u6848\u4ef6\u3067\u5f79\u7acb\u3064\u30ec\u30a4\u30a2\u30a6\u30c8\u5b9f\u88c5\u306e\u57fa\u672c<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-modern-ui-components-30\/\">\u3010\u30b3\u30d4\u30da\u53ef\u3011CSS\u3060\u3051\u3067\u4f5c\u308b\u30e2\u30c0\u30f3UI\u30d1\u30fc\u30c430\u9078\uff5c\u5b9f\u88c5\u30b3\u30fc\u30c9\u5168\u90e8\u8f09\u305b<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CSS\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u300c\u30ec\u30a4\u30a2\u30a6\u30c8\u30fb\u88c5\u98fe\u30fb\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30fb\u57fa\u790e\u30fb\u30c8\u30e9\u30d6\u30eb\u89e3\u6c7a\u300d\u306e\u76ee\u7684\u5225\u306b\u63a2\u305b\u308b\u7dcf\u307e\u3068\u3081\u30da\u30fc\u30b8\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u88c5\u3067\u8ff7\u3063\u305f\u3068\u304d\u306e\u7d22\u5f15\u3068\u3057\u3066\u3069\u3046\u305e\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-webdesign-technique-map\/\">\u3010CSS\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u5b8c\u5168\u30de\u30c3\u30d7\u3011\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308bWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u30ac\u30a4\u30c9\u7dcf\u307e\u3068\u3081<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">WithCode\u3092\u4f53\u9a13\u3067\u304d\u308b\u521d\u7d1a\u30b3\u30fc\u30b9\u516c\u958b\u4e2d\uff01<\/h2>\n\n<figure class=\"wp-block-image alignleft size-full\"><img decoding=\"async\" width=\"600\" height=\"500\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/04\/\u30d0\u30ca\u30fc_300\u00d7250_20240425.png\" alt=\"WithCode\u3092\u4f53\u9a13\u3067\u304d\u308b\u521d\u7d1a\u30b3\u30fc\u30b9\u516c\u958b\u4e2d\uff01\" class=\"wp-image-2650\"\/><\/figure>\n\n<h3 class=\"wp-block-heading\">\u521d\u7d1a\u30b3\u30fc\u30b9(\u00a549,800)\u304c\u5b8c\u5168\u7121\u6599\u306b\uff01<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u671f\u9593\uff1a1\u9031\u9593<\/strong><\/li>\n<li><strong>\u5b66\u7fd2\u5185\u5bb9\uff1a<\/strong><br><strong>\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\/\u57fa\u790e\u77e5\u8b58\/\u74b0\u5883\u69cb\u7bc9\/HTML\/CSS\/LP\u30fb\u30dd\u30fc\u30c8\u30d5\u30a9\u30ea\u30aa\u4f5c\u6210<\/strong><br><strong>\u2192 <span class=\"swl-marker mark_yellow\">\u6b63\u3057\u3044\u5b66\u7fd2\u65b9\u6cd5\u3067\u300c\u78ba\u304b\u306a\u6210\u9577\u300d\u3092\u5b9f\u611f\u3067\u304d\u308b\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0\u3002<\/span><\/strong><\/li>\n<\/ul>\n\n<p>\u526f\u696d\u30fb\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u304c\u4e3b\u6d41\u306b\u306a\u3063\u3066\u3044\u308b\u4eca\u3053\u305d\u3001\u81ea\u3089\u306e\u30b9\u30ad\u30eb\u3067\u7a3c\u3052\u308b\u4eba\u6750\u3092\u76ee\u6307\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f<\/p>\n\n<p>\u672a\u7d4c\u9a13\u3067\u3082\u5fc3\u914d\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u521d\u7d1a\u30b3\u30fc\u30b9\u3092\u53d7\u8b1b\u3055\u308c\u308b\u65b9\u306e\u5927\u591a\u6570\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u672a\u7d4c\u9a13\u3067\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u30ab\u30a6\u30f3\u30bb\u30ea\u30f3\u30b0\u3067\u3001\u60a9\u307f\u3084\u4e0d\u5b89\u3092\u304a\u805e\u304b\u305b\u304f\u3060\u3055\u3044\uff01<\/p>\n\n<div class=\"wp-block-buttons\"><div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/withcode.tech\/reservation\/\" style=\"background-color:#ffbf00\"><strong>\u516c\u5f0f\u30b5\u30a4\u30c8\u304b\u3089\u7121\u6599\u30ab\u30a6\u30f3\u30bb\u30ea\u30f3\u30b0\u306b\u7533\u3057\u8fbc\u3080 \u2192<\/strong><\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>CSS\u3067\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3082\u30d8\u30c3\u30c0\u30fc\u304c\u8ffd\u3044\u304b\u3051\u3066\u304f\u308b\u300d\u300c\u76ee\u6b21\u304c\u753b\u9762\u306b\u56fa\u5b9a\u3055\u308c\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u52d5\u304d\u3092\u5b9f\u88c5\u3057\u305f\u3044\u3068\u304d\u3001position: sticky \u304c\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u5f37\u529b\u306a\u9078\u629e\u80a2\u3067\u3059\u3002JavaScript\u306f\u4e0d\u8981\u3067\u3001\u6570\u884c\u306eCS [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":18283,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"swell_btn_cv_data":"","footnotes":"","vk-ltc-link":"","vk-ltc-target":""},"categories":[361],"tags":[],"class_list":["post-18104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-css"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/18104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/comments?post=18104"}],"version-history":[{"count":2,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/18104\/revisions"}],"predecessor-version":[{"id":18137,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/18104\/revisions\/18137"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/media\/18283"}],"wp:attachment":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/media?parent=18104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/categories?post=18104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/tags?post=18104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}