{"id":7176,"date":"2024-11-04T10:16:08","date_gmt":"2024-11-04T10:16:08","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=7176"},"modified":"2026-01-03T05:59:18","modified_gmt":"2026-01-03T05:59:18","slug":"css_absolute_relative","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css_absolute_relative\/","title":{"rendered":"\u3010CSS\u3011position\u306eabsolute\u3068relative\u306e\u4f7f\u3044\u65b9\u3092\u8a73\u3057\u304f\u89e3\u8aac\uff01"},"content":{"rendered":"<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.40.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u30da\u30f3\u535a\u58eb\u3001position\u306e absolute \u3068 relative \u304c\u3088\u304f\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u3069\u3046\u4f7f\u3044\u5206\u3051\u308c\u3070\u3044\u3044\u3093\u3067\u3057\u3087\u3046\u304b\uff1f<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.08.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3075\u3080\u3075\u3080\u3002\u8981\u306f\u300c<strong>\u57fa\u6e96\uff08\u3069\u3053\u3092\u8d77\u70b9\u306b\u7f6e\u304f\u304b\uff09<\/strong>\u300d\u3068\u300c<strong>\u6587\u66f8\u306e\u6d41\u308c\u306b\u5c45\u308b\u304b\/\u5916\u308c\u308b\u304b<\/strong>\u300d\u3058\u3083\u3002\u4eca\u304b\u3089\u8a73\u3057\u304f\u89e3\u8aac\u3059\u308b\u304b\u3089\u3088\u30fc\u304f\u805e\u304f\u3093\u3058\u3083\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\uff01\u304a\u9858\u3044\u3057\u307e\u3059\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>CSS\u3067\u8981\u7d20\u306e\u914d\u7f6e\u304c\u601d\u3044\u901a\u308a\u306b\u3044\u304b\u306a\u3044\u3001\u305d\u3093\u306a\u60a9\u307f\u3092\u62b1\u3048\u3066\u3044\u307e\u305b\u3093\u304b\uff1f<\/p>\n\n\n\n<p>\u7279\u306b <strong>position: relative<\/strong> \u3068 <strong>absolute<\/strong> \u306e\u9055\u3044\u3084\u4f7f\u3044\u5206\u3051\u304c\u5206\u304b\u3089\u306a\u3044\u3068\u3001\u601d\u3044\u901a\u308a\u306b\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u8abf\u6574\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u3066\u6b63\u3057\u304f\u4f7f\u3048\u3070\u3001\u8981\u7d20\u306e\u914d\u7f6e\u306f\u7c21\u5358\u306b\u306a\u308a\u3001\u52b9\u7387\u7684\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u3068\u5b9f\u4f8b\u3092\u901a\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_announce\">\u300c\u5b66\u7fd2\u2192\u53ce\u5165\u300d\u306b\u3064\u306a\u3052\u305f\u53d7\u8b1b\u751f\u306e\u30ea\u30a2\u30eb\u306a\u4f53\u9a13\u8ac7\u3082\u516c\u958b\u4e2d\uff01<br>\u50cd\u304d\u65b9\u3092\u5909\u3048\u305f\u3044\u65b9\u306b\u3082\u97ff\u304f\u30b9\u30c8\u30fc\u30ea\u30fc\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_info\"><strong>O.Y\u3055\u3093<\/strong><br>\u5b50\u80b2\u3066\u3068\u4e21\u7acb\u3067\u304d\u308b\u50cd\u304d\u65b9\u3092\u76ee\u6307\u3057\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b66\u7fd2\u3092\u958b\u59cb\u3059\u308b\u3002\u72ec\u5b66\u3067\u306e\u5b66\u7fd2\u306b\u9650\u754c\u3092\u611f\u3058\u3001WithCode\u306e\u526f\u696d\u30b3\u30fc\u30b9\u306e\u53d7\u8b1b\u3092\u6c7a\u610f\u3002\u6700\u7d42\u76ee\u6a19\u304b\u3089\u9006\u7b97\u3057\u305f\u5b66\u7fd2\u8a08\u753b\u306e\u3082\u3068\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3057\u3001\u5352\u696d\u5f8c\u306b\u521d\u6848\u4ef6\u3092\u62c5\u5f53\u3002\u73fe\u5728\u306f\u5b9f\u6848\u4ef6\u30b5\u30dd\u30fc\u30c8\u306e\u3082\u3068\u3001\u8907\u6570\u6848\u4ef6\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>\u8a73\u3057\u304f\u306f<a href=\"https:\/\/withcode.tech\/media\/interview_10\/\" title=\"\u3053\u3061\u3089\u306e\u8a18\u4e8b\">\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type1\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/05\/\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc-17.jpg\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/withcode.tech\/media\/interview_10\/\">\u3010\u526f\u696d\u76ee\u6307\u3059\u30de\u30de\u3055\u3093\u5fc5\u898b\u3011\u30c6\u30c3\u30af\u30a2\u30ab\u30c7\u30df\u30fc\u5352\u696d\u5f8c\u306b\u518d\u5165\u5b66\uff01\u80b2\u5150\u3068\u5b66\u7fd2\u3092\u4e21\u7acb\u3055\u305b\u3066&#8221;\u670810\u4e07\u5186&amp;#&#8230;<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">\u30da\u30f3\u535a\u58eb\uff01\u4eca\u56de\u306f\u3069\u3093\u306a\u65b9\u304c\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc\u306b\u5fdc\u3058\u3066\u304f\u3060\u3055\u3063\u305f\u3093\u3067\u3059\u304b\uff1f \u3046\u3080\u3002\u4eca\u56de\u306f\u80b2\u5150\u3068\u5b66\u7fd2\u3092\u4e21\u7acb\u3057\u306a\u304c\u3089\u670810\u4e07\u5186\u306e\u526f\u53ce\u5165\u3092\u9054\u6210\u3057\u305f\u30de\u30de\u3055\u3093\u3058\u3083\u3088\u3002\u5b66\u7fd2\u65b9\u6cd5\u3001\u6848&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<h2 class=\"wp-block-heading\">position\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u306f\uff1f\u57fa\u672c\u3092\u62bc\u3055\u3048\u3088\u3046<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"792\" height=\"447\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/10\/2-3.png\" alt=\"\" class=\"wp-image-7178\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/10\/2-3.png 792w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/10\/2-3-768x433.png 768w\" sizes=\"(max-width: 792px) 100vw, 792px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>relative\u3068absolute\u306e\u9055\u3044<\/strong><\/h3>\n\n\n\n<p>CSS\u306e <strong>position<\/strong> \u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u8981\u7d20\u306e\u914d\u7f6e\u65b9\u6cd5\u3092\u6307\u5b9a\u3059\u308b\u969b\u306b\u91cd\u8981\u306a\u5f79\u5272\u3067\u3059\u3002\u7279\u306b\u3001<strong>relative<\/strong>\u3001<strong>absolute<\/strong> \u306f\u3088\u304f\u4f7f\u308f\u308c\u308b\u5024\u3067\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>relative<\/strong> \u306f\u3001\u8981\u7d20\u306e\u672c\u6765\u306e\u4f4d\u7f6e\u304b\u3089\u76f8\u5bfe\u7684\u306b\u4f4d\u7f6e\u3092\u8abf\u6574\u3067\u304d\u308b\u30e2\u30fc\u30c9\u3067\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">relative \u306f\u3001\u4ed6\u306e\u8981\u7d20\u306e\u914d\u7f6e\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305a\u306b\u3001\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u5fae\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/span><\/strong><\/p>\n\n\n\n<p><strong>absolute<\/strong> \u306f\u3001\u8981\u7d20\u3092\u89aa\u8981\u7d20\u3092\u57fa\u6e96\u306b\u7d76\u5bfe\u4f4d\u7f6e\u306b\u914d\u7f6e\u3057\u3001\u89aa\u8981\u7d20\u304c <strong>position: relative<\/strong> \u3092\u6301\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306e\u4f4d\u7f6e\u304c\u57fa\u6e96\u306b\u306a\u308a\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">absolute\u3092\u4f7f\u3046\u3068\u3001\u8981\u7d20\u306f\u6587\u66f8\u306e\u6d41\u308c\u304b\u3089\u5916\u308c\u3001\u81ea\u7531\u306a\u4f4d\u7f6e\u306b\u914d\u7f6e\u3067\u304d\u308b<\/span><\/strong>\u305f\u3081\u3001\u8907\u96d1\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u69cb\u7bc9\u3059\u308b\u969b\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u5404position\u306e\u52d5\u4f5c\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u8a2d\u8a08\u304c\u53ef\u80fd\u3058\u3083\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>position\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3064\u3044\u3066\u3082\u3063\u3068\u77e5\u308a\u305f\u3044\u65b9\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/CSS\/position\">CSS\u516c\u5f0f\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9-position\u306b\u3064\u3044\u3066<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">position relative\u306e\u4f7f\u3044\u65b9\u3068\u305d\u306e\u5177\u4f53\u4f8b<\/h2>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u3053\u3067\u306f\u3001position relative\u306e\u4f7f\u3044\u65b9\u3068\u305d\u306e\u5177\u4f53\u4f8b\u3092\u89e3\u8aac\u3059\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u5fae\u8abf\u6574\u3059\u308b<\/strong><\/h3>\n\n\n\n<p>relative\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u8981\u7d20\u306e\u5143\u306e\u4f4d\u7f6e\u306f\u305d\u306e\u307e\u307e\u6b8b\u308a\u3001\u8996\u899a\u7684\u306b\u52d5\u3044\u305f\u4f4d\u7f6e\u304c\u53cd\u6620\u3055\u308c\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">\u8907\u96d1\u306aCSS\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u4e2d\u3067\u3082\u3001\u7279\u5b9a\u306e\u8981\u7d20\u3060\u3051\u3092\u67d4\u8edf\u306b\u8abf\u6574\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd<\/span><\/strong>\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u3084\u30dc\u30bf\u30f3\u3001\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30e1\u30cb\u30e5\u30fc\u306a\u3069\u306e\u8981\u7d20\u3092\u76f8\u5bfe\u7684\u306b\u914d\u7f6e\u3057\u76f4\u3059\u3068\u304d\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u8996\u899a\u7684\u306a\u8abf\u6574\u306b\u4f7f\u3046\u969b\u306b\u306f\u3001<strong>top<\/strong> \u3084 <strong>left<\/strong> \u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u5fae\u8abf\u6574\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"jOgwdvK\" data-pen-title=\"relative-1\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/jOgwdvK\">\n\n\u00a0\u00a0relative-1<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<ul class=\"wp-block-list\">\n<li>.box \u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u8981\u7d20\u3092\u5143\u306e\u4f4d\u7f6e\u304b\u3089 <strong>top: 20px<\/strong> \u3068 <strong>left: 30px<\/strong> \u3067\u76f8\u5bfe\u7684\u306b\u79fb\u52d5\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>container<\/strong> \u306f\u6587\u66f8\u306e\u6d41\u308c\u306b\u5f93\u3063\u3066\u914d\u7f6e\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u3067 <strong>.box<\/strong> \u306e\u4f4d\u7f6e\u3060\u3051\u304c\u76f8\u5bfe\u7684\u306b\u305a\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.12.07.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u306e\u3088\u3046\u306b relative \u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u89aa\u8981\u7d20\u3084\u4ed6\u306e\u8981\u7d20\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305a\u306b\u3001\u500b\u5225\u306b\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u5fae\u8abf\u6574\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3058\u3083\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3059\u308b<\/strong><\/h3>\n\n\n\n<p>\u8981\u7d20\u306e\u5143\u306e\u4f4d\u7f6e\u3092\u57fa\u6e96\u306b\u52d5\u304d\u3092\u4e0e\u3048\u308b\u3053\u3068\u3067\u3001\u4ed6\u306e\u8981\u7d20\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305a\u306b\u6ed1\u3089\u304b\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30dc\u30bf\u30f3\u304c\u30db\u30d0\u30fc\u3055\u308c\u305f\u3068\u304d\u306b\u4e0a\u4e0b\u306b\u52d5\u304f\u3001\u307e\u305f\u306f\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30e1\u30cb\u30e5\u30fc\u304c\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306a\u52b9\u679c\u3092\u4f5c\u308b\u969b\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>position: relative<\/strong> \u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u8981\u7d20\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u81ea\u4f53\u306f\u305d\u306e\u307e\u307e\u7dad\u6301\u3055\u308c\u3001\u52d5\u304d\u3092\u4e0e\u3048\u3066\u3082\u30da\u30fc\u30b8\u5168\u4f53\u306e\u69cb\u9020\u304c\u5d29\u308c\u307e\u305b\u3093\u3002\u3055\u3089\u306b\u3001CSS\u306e <strong>@keyframes<\/strong> \u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u52d5\u304d\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3082\u7c21\u5358\u306b\u5b9f\u88c5\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"OJKgdrx\" data-pen-title=\"Untitled\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/OJKgdrx\">\n\n\u00a0\u00a0Untitled<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3053\u306e\u4f8b\u3067\u306f\u3001 <strong>position: relative<\/strong> \u3092\u4f7f\u3063\u3066\u30dc\u30c3\u30af\u30b9\u304c\u4e0a\u4e0b\u306b\u52d5\u304f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>@keyframes<\/strong> \u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u304d\u3092\u6307\u5b9a\u3057\u3001\u30dc\u30c3\u30af\u30b9\u304c\u4e0a\u4e0b\u306b20px\u52d5\u304d\u3001\u5143\u306e\u4f4d\u7f6e\u306b\u623b\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u7e70\u308a\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u306e\u3088\u3046\u306b\u3001position: relative \u306f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u6709\u52b9\u3058\u3083\u3002\u4ed6\u306e\u8981\u7d20\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305a\u306b\u52d5\u304d\u3092\u52a0\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u52d5\u7684\u306a\u30c7\u30b6\u30a4\u30f3\u3092\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u3082\u3063\u3068\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u65b9\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/withcode.tech\/media\/animation_pyon\/\">CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u300c\u307d\u3088\u3093\u300d\u3068\u52d5\u304b\u3059\uff01\u521d\u5fc3\u8005\u3067\u3082\u3067\u304d\u308b\u5b9f\u88c5\u30ac\u30a4\u30c9<\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-withcode-media wp-block-embed-withcode-media\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/withcode.tech\/media\/animation_pyon\/\n<\/div><\/figure>\n\n\n\n<p><a href=\"https:\/\/withcode.tech\/media\/css_animation_rotation\/\">\u3010\u7c21\u5358\uff01\u3011CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u56de\u8ee2\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u8a73\u3057\u304f\u89e3\u8aac<\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-withcode-media wp-block-embed-withcode-media\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/withcode.tech\/media\/css_animation_rotation\/\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">position absolute\u306e\u4f7f\u3044\u65b9\u3068\u5b9f\u7528\u4f8b<\/h2>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30a2\u30bb\u30c3\u30c8-6@4x-2.png\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u3053\u3067\u306f\u3001position absolute\u306e\u4f7f\u3044\u65b9\u3068\u5b9f\u7528\u4f8b\u3092\u89e3\u8aac\u3059\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>relative\u3068absolute\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b<\/strong><\/h3>\n\n\n\n<p><strong>position: absolute<\/strong> \u306f\u3001\u901a\u5e38 <strong>position: relative<\/strong> \u3092\u6307\u5b9a\u3055\u308c\u305f\u89aa\u8981\u7d20\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002absolute\u306e\u8981\u7d20\u306f\u3001\u89aa\u8981\u7d20\u3092\u57fa\u6e96\u306b\u3057\u3066\u914d\u7f6e\u304c\u6c7a\u307e\u308b\u305f\u3081\u3001\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u5b50\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u81ea\u7531\u306b\u8abf\u6574\u3067\u304d\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u67d4\u8edf\u6027\u3092\u9ad8\u3081\u308b\u6709\u52b9\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001Web\u30da\u30fc\u30b8\u3067\u30d0\u30ca\u30fc\u306e\u4e0a\u306b\u30c6\u30ad\u30b9\u30c8\u3084\u30dc\u30bf\u30f3\u3092\u91cd\u306d\u305f\u3044\u5834\u5408\u3001<strong><span class=\"swl-marker mark_yellow\">\u89aa\u8981\u7d20\u306b relative \u3092\u8a2d\u5b9a\u3057\u3001\u5b50\u8981\u7d20\u306b absolute \u3092\u4f7f\u3046<\/span><\/strong>\u3068\u3001\u30c6\u30ad\u30b9\u30c8\u3084\u30dc\u30bf\u30f3\u3092\u81ea\u7531\u306b\u914d\u7f6e\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u3063\u3066\u3001\u4ed6\u306e\u8981\u7d20\u306e\u914d\u7f6e\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u306a\u304f\u3001\u610f\u56f3\u3057\u305f\u901a\u308a\u306b\u8868\u793a\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u306f\u3001\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u5b50\u8981\u7d20\u306e\u753b\u50cf\u3084\u30c6\u30ad\u30b9\u30c8\u3092 <strong>absolute<\/strong> \u3067\u91cd\u306d\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"abeYQjK\" data-pen-title=\"Untitled\" data-user=\"ddwkeakz-the-reactor\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/ddwkeakz-the-reactor\/pen\/abeYQjK\">\n  Untitled<\/a> by \u305b\u3044\u3084 (<a href=\"https:\/\/codepen.io\/ddwkeakz-the-reactor\">@ddwkeakz-the-reactor<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<strong>.container<\/strong> \u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u4e2d\u306b\u3042\u308b <strong>.overlay-text<\/strong> \u306f <strong>position: absolute<\/strong> \u3067\u3001\u30d0\u30ca\u30fc\u753b\u50cf\u306e\u4e0a\u306b\u81ea\u7531\u306b\u914d\u7f6e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u5177\u4f53\u4f8b<\/strong><\/h3>\n\n\n\n<p><strong>position: absolute<\/strong> \u306f\u3001\u8981\u7d20\u3092\u6587\u66f8\u306e\u6d41\u308c\u304b\u3089\u5207\u308a\u96e2\u3057\u3066\u3001\u89aa\u8981\u7d20\u306b\u5bfe\u3057\u3066\u7d76\u5bfe\u7684\u306a\u4f4d\u7f6e\u306b\u914d\u7f6e\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u3053\u308c\u3092\u4f7f\u3048\u3070\u3001<strong><span class=\"swl-marker mark_yellow\">\u7279\u5b9a\u306e\u8981\u7d20\u3092\u81ea\u7531\u306b\u914d\u7f6e\u3067\u304d\u3001\u8907\u96d1\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u7c21\u5358\u306b\u4f5c\u6210<\/span><\/strong>\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u30012\u3064\u306e\u8981\u7d20\u304c\u4e26\u3093\u3060\u30ec\u30a4\u30a2\u30a6\u30c8\u3084\u8907\u6570\u306e\u91cd\u306a\u308a\u5408\u3063\u305f\u8981\u7d20\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30b6\u30a4\u30f3\u306b\u304a\u3044\u3066\u3001\u7d76\u5bfe\u4f4d\u7f6e\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u8996\u899a\u7684\u306b\u30ea\u30c3\u30c1\u306a\u753b\u9762\u304c\u4f5c\u6210\u53ef\u80fd\u3067\u3059\u3002\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u4e0a\u306b\u5b50\u8981\u7d20\u3092 <strong>position: absolute<\/strong> \u3067\u914d\u7f6e\u3059\u308b\u3053\u3068\u3067\u3001\u89aa\u8981\u7d20\u5185\u3067\u306e\u5b50\u8981\u7d20\u306e\u914d\u7f6e\u304c\u610f\u56f3\u901a\u308a\u306b\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306b\u3001\u5177\u4f53\u7684\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"jOgwdJp\" data-pen-title=\"relative-4\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/jOgwdJp\">\n\n\u00a0\u00a0relative-4<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3053\u306e\u4f8b\u3067\u306f\u3001\u89aa\u8981\u7d20 <strong>.container<\/strong> \u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>.sidebar<\/strong> \u306f <strong>position: absolute<\/strong> \u3067\u914d\u7f6e\u3055\u308c\u3066\u304a\u308a\u3001\u753b\u9762\u306e\u5de6\u5074\u306b\u56fa\u5b9a\u3002<\/li>\n\n\n\n<li><strong>.main-content<\/strong> \u306f <strong>left: 25%<\/strong> \u3067\u914d\u7f6e\u3055\u308c\u3001\u30b5\u30a4\u30c9\u30d0\u30fc\u306e\u6a2a\u306b\u4f4d\u7f6e\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u306e\u3088\u3046\u306b\u3001\u7d76\u5bfe\u4f4d\u7f6e\u6307\u5b9a\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u89aa\u8981\u7d20\u306e\u4e2d\u3067\u8981\u7d20\u3092\u81ea\u7531\u306b\u914d\u7f6e\u3067\u304d\u308b\u305f\u3081\u3001\u8907\u96d1\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u52b9\u7387\u7684\u306b\u69cb\u7bc9\u3067\u304d\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">CSS\u30ec\u30a4\u30a2\u30a6\u30c8\u306b\u304a\u3051\u308bz-index\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30a2\u30bb\u30c3\u30c8-6@4x-2.png\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u3053\u3067\u306f\u3001CSS\u30ec\u30a4\u30a2\u30a6\u30c8\u306b\u304a\u3051\u308bz-index\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3059\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>position\u3068z-index\u3067\u8981\u7d20\u3092\u91cd\u306d\u308b<\/strong><\/h3>\n\n\n\n<p><strong>z-index<\/strong> \u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u8981\u7d20\u306e\u91cd\u306a\u308a\u9806\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u3001\u7279\u306b<strong>position: relative<\/strong> \u3084 <strong>position: absolute<\/strong> \u3092\u4f7f\u3063\u3066\u8981\u7d20\u3092\u914d\u7f6e\u3057\u305f\u969b\u306b\u3001<strong><span class=\"swl-marker mark_yellow\">\u3069\u306e\u8981\u7d20\u304c\u524d\u9762\u306b\u8868\u793a\u3055\u308c\u3001\u3069\u306e\u8981\u7d20\u304c\u80cc\u9762\u306b\u96a0\u308c\u308b\u304b\u3092\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002z-index \u306e\u6570\u5024\u304c\u5927\u304d\u3044\u307b\u3069\u3001\u305d\u306e\u8981\u7d20\u306f\u524d\u9762\u306b\u8868\u793a\u3055\u308c\u3001\u5c0f\u3055\u3044\u6570\u5024\u306e\u8981\u7d20\u306f\u80cc\u9762\u306b\u914d\u7f6e<\/span><\/strong>\u3055\u308c\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u8907\u6570\u306e\u753b\u50cf\u3084\u30c6\u30ad\u30b9\u30c8\u304c\u91cd\u306a\u308b\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u3001\u7279\u5b9a\u306e\u8981\u7d20\u3092\u524d\u9762\u306b\u8868\u793a\u3057\u305f\u3044\u5834\u5408\u306b <strong>z-index<\/strong> \u3092\u5229\u7528\u3057\u307e\u3059\u3002\u901a\u5e38\u3001\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u4e2d\u306e\u5b50\u8981\u7d20\u306b <strong>z-index<\/strong> \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u671f\u5f85\u901a\u308a\u306e\u30ec\u30a4\u30e4\u30fc\u914d\u7f6e\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"GRVEzLE\" data-pen-title=\"relative-5\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/GRVEzLE\">\n\n\u00a0\u00a0relative-5<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>.container<\/strong> \u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u5b50\u8981\u7d20\u3092 <strong>position: absolute<\/strong> \u3067\u81ea\u7531\u306b\u914d\u7f6e\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>z-index<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u3001<strong>.box1<\/strong> \u3092\u6700\u80cc\u9762\u3001<strong>.box3<\/strong> \u3092\u6700\u524d\u9762\u306b\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">position\u304c\u52b9\u304b\u306a\u3044\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"924\" height=\"636\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2024-12-12-23.01.33.png\" alt=\"\" class=\"wp-image-7769\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2024-12-12-23.01.33.png 924w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/11\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2024-12-12-23.01.33-768x529.png 768w\" sizes=\"(max-width: 924px) 100vw, 924px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.13.05.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u3053\u3067\u306f\u3001position\u304c\u52b9\u304b\u306a\u3044\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\u3092\u89e3\u8aac\u3059\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>\u89aa\u8981\u7d20\u306bposition\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044<\/strong><\/h3>\n\n\n\n<p><strong>position: absolute<\/strong> \u3092\u4f7f\u3063\u3066\u3044\u308b\u3068\u304d\u3001\u671f\u5f85\u901a\u308a\u306b\u8981\u7d20\u304c\u914d\u7f6e\u3055\u308c\u306a\u3044\u5834\u5408\u3001\u305d\u306e\u539f\u56e0\u306f<strong><span class=\"swl-marker mark_yellow\">\u89aa\u8981\u7d20\u306b position: relative \u307e\u305f\u306f position: absolute \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u591a\u3044<\/span><\/strong>\u3067\u3059\u3002\u7d76\u5bfe\u914d\u7f6e\u306e\u8981\u7d20\uff08<strong>absolute<\/strong>\uff09\u306f\u3001\u6700\u3082\u8fd1\u3044\u89aa\u8981\u7d20\u306e <strong>position<\/strong> \u30d7\u30ed\u30d1\u30c6\u30a3\u304c <strong>relative<\/strong> \u307e\u305f\u306f <strong>absolute<\/strong> \u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u524d\u63d0\u306b\u3057\u3066\u914d\u7f6e\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3082\u3057\u89aa\u8981\u7d20\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e <strong>position: static<\/strong> \u306e\u307e\u307e\u3060\u3068\u3001\u753b\u9762\u5168\u4f53\u3092\u57fa\u6e96\u306b\u914d\u7f6e\u3055\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u601d\u3044\u901a\u308a\u306b\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u7d44\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bfe\u51e6\u6cd5\uff1a\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306b\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u89aa\u8981\u7d20\u306bposition: relative\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\uff1a<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"eYqRxqa\" data-pen-title=\"relative-6\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/eYqRxqa\">\n\n\u00a0\u00a0relative-6<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u5b50\u8981\u7d20\u3067\u4f4d\u7f6e\u3092\u6307\u5b9a\u3057\u3066\u307e\u3059\u304c\u3001\u89aa\u8981\u7d20\u304b\u3089\u96e2\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u89aa\u8981\u7d20\u306bposition: relative\u3092\u8a2d\u5b9a\u3057\u305f\u5834\u5408\uff1a<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"yLmXwBZ\" data-pen-title=\"relative-7\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/yLmXwBZ\">\n\n\u00a0\u00a0relative-7<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>\u89aa\u8981\u7d20\u306b <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u5b50\u8981\u7d20\u306e <strong>position: absolute<\/strong> \u306f\u89aa\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u57fa\u6e96\u306b\u3057\u3066\u914d\u7f6e\u3055\u308c\u3001\u610f\u56f3\u901a\u308a\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>overflow: hidden \u304c\u89aa\u8981\u7d20\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b<\/strong><\/h3>\n\n\n\n<p><strong>overflow: hidden<\/strong> \u306f\u3001\u89aa\u8981\u7d20\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u306f\u307f\u51fa\u3057\u305f\u3068\u304d\u306b\u3001\u306f\u307f\u51fa\u3057\u305f\u90e8\u5206\u3092\u8868\u793a\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u3001<strong><span class=\"swl-marker mark_yellow\">position: absolute \u3084 relative \u3092\u4f7f\u3063\u3066\u8981\u7d20\u3092\u81ea\u7531\u306b\u914d\u7f6e\u3057\u3066\u3082\u3001\u89aa\u8981\u7d20\u306e\u5883\u754c\u5916\u306b\u51fa\u305f\u90e8\u5206\u306f\u96a0\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/span><\/strong><\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u30d0\u30ca\u30fc\u753b\u50cf\u306e\u4e0a\u306b\u30dc\u30bf\u30f3\u3084\u30c6\u30ad\u30b9\u30c8\u3092 <strong>absolute<\/strong> \u3067\u914d\u7f6e\u3057\u3066\u3001\u89aa\u8981\u7d20\u3092\u8d85\u3048\u3066\u8868\u793a\u3055\u305b\u305f\u3044\u3068\u304d\u306b\u3001<strong>overflow: hidden<\/strong> \u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3001\u30dc\u30bf\u30f3\u3084\u30c6\u30ad\u30b9\u30c8\u304c\u4e00\u90e8\u898b\u3048\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bfe\u51e6\u6cd5\uff1a<strong>overflow: visible<\/strong> \u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3001\u306f\u307f\u51fa\u3057\u305f\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8868\u793a\u3055\u305b\u308b<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306b\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>overflow: hidden\u306e\u5834\u5408<\/strong><\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"GRVEegM\" data-pen-title=\"relative-8\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/GRVEegM\">\n\n\u00a0\u00a0relative-8<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p><strong>overflow: visible\u306e\u5834\u5408<\/strong><\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"ExqXMja\" data-pen-title=\"relative-9\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/ExqXMja\">\n\n\u00a0\u00a0relative-9<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3053\u306e\u3088\u3046\u306bvisible\u306b\u3059\u308b\u3053\u3068\u3067\u8868\u793a\u3067\u304d\u308b\u3002\u306a\u304a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8a2d\u5b9a\u3067\u306foverflow\u30d7\u30ed\u30d1\u30c6\u30a3\u306fvisible\u3058\u3083\u3002overflow\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u671f\u5f85\u901a\u308a\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u306b\u306a\u308b\u305e\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>z-index\u5024\u3068\u7af6\u5408\u3057\u3066\u3044\u308b<\/strong><\/h3>\n\n\n\n<p><strong>z-index<\/strong> \u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u8981\u7d20\u306e\u91cd\u306a\u308a\u9806\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304c\u3001<strong><span class=\"swl-marker mark_yellow\">\u8907\u6570\u306e\u8981\u7d20\u3067 z-index \u306e\u5024\u304c\u7af6\u5408\u3057\u3066\u3044\u308b\u3068\u3001\u610f\u56f3\u3057\u305f\u9806\u756a\u3067\u8981\u7d20\u304c\u8868\u793a\u3055\u308c\u306a\u3044<\/span><\/strong>\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u7570\u306a\u308b <strong>position<\/strong> \u306e\u8a2d\u5b9a\u304c\u7d44\u307f\u5408\u308f\u3055\u308b\u3068\u3001\u3053\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u8907\u6570\u306e\u8981\u7d20\u306b <strong>position: absolute<\/strong> \u3092\u8a2d\u5b9a\u3057\u3001\u305d\u308c\u305e\u308c\u306b\u7570\u306a\u308b <strong>z-index<\/strong> \u306e\u5024\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u6b63\u3057\u304f\u524d\u9762\u3084\u80cc\u9762\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u3001\u8981\u7d20\u304c\u5c5e\u3059\u308b <strong>stacking context<\/strong>\uff08\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\uff09\u306b\u3088\u308b\u3082\u306e\u304c\u539f\u56e0\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u3001Web\u30da\u30fc\u30b8\u3067<strong><span class=\"swl-marker mark_yellow\">\u300c\u3069\u306e\u8981\u7d20\u304c\u3069\u306e\u8981\u7d20\u306e\u524d\u306b\u8868\u793a\u3055\u308c\u308b\u304b\u300d\u3092\u6c7a\u3081\u308b\u4ed5\u7d44\u307f<\/span><\/strong>\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u753b\u50cf\u3084\u30dc\u30bf\u30f3\u304c\u3069\u306e\u9806\u756a\u3067\u91cd\u306a\u3063\u3066\u8868\u793a\u3055\u308c\u308b\u304b\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u305f\u3081\u306b\u4f7f\u3044\u3001\u7279\u5b9a\u306e\u8981\u7d20\u304c\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u308b\u3068\u3001\u305d\u306e\u4e2d\u306b\u3042\u308b\u8981\u7d20\u306f\u3001\u5916\u5074\u306e\u8981\u7d20\u3068\u5225\u306b\u91cd\u306a\u308a\u9806\u3092\u6301\u3064\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306frelative\u3001absolute\u3001fixed\u306a\u3069\u3092\u4f7f\u7528\u3059\u308b\u3068\u4f5c\u6210\u3055\u308c\u308b\u3002\u89aa\u8981\u7d20\u304c\u65b0\u3057\u3044\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u305f\u5834\u5408\u3001\u5b50\u8981\u7d20\u306e z-index \u304c\u52b9\u304b\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u306e\u3058\u3083\u3002<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h4 class=\"wp-block-heading\">\u5bfe\u51e6\u6cd5\uff1a<strong>z-index<\/strong> \u306e\u5024\u304c\u610f\u56f3\u901a\u308a\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/h4>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"vYoZPGZ\" data-pen-title=\"relative-10\" data-user=\"kenkenpyo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n\n\u00a0\u00a0<span>See the Pen <a href=\"https:\/\/codepen.io\/kenkenpyo\/pen\/vYoZPGZ\">\n\n\u00a0\u00a0relative-10<\/a> by kosuke (<a href=\"https:\/\/codepen.io\/kenkenpyo\">@kenkenpyo<\/a>)\n\n\u00a0\u00a0on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n\n<\/p>\n\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>.container<\/strong> \u8981\u7d20\u306f <strong>position: relative<\/strong> \u3092\u8a2d\u5b9a\u3057\u3066\u65b0\u3057\u3044\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>z-index<\/strong> \u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3057\u3001<strong>.box2<\/strong> \u304c <strong>.box1<\/strong> \u3088\u308a\u524d\u9762\u306b\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong>z-index<\/strong> \u3068\u30b9\u30bf\u30c3\u30ad\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u7406\u89e3\u3057\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u8981\u7d20\u306e\u91cd\u306a\u308a\u9806\u3092\u610f\u56f3\u901a\u308a\u306b\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9ad8\u3055\u3084\u5e45\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044<\/strong><\/h3>\n\n\n\n<p><strong>position<\/strong> \u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3063\u3066\u8981\u7d20\u3092\u914d\u7f6e\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u3001\u8981\u7d20\u304c\u6b63\u3057\u304f\u8868\u793a\u3055\u308c\u306a\u3044\u5834\u5408\u3001\u9ad8\u3055\u3084\u5e45\u306e\u6307\u5b9a\u304c\u6b20\u3051\u3066\u3044\u308b\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u3001<strong><span class=\"swl-marker mark_yellow\">\u7279\u306b\u89aa\u8981\u7d20\u3084\u5b50\u8981\u7d20\u306bwidth \u3084 height \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u8981\u7d20\u304c\u610f\u56f3\u3057\u306a\u3044\u5f62\u3067\u8868\u793a\u3055\u308c\u305f\u308a\u3001\u914d\u7f6e\u304c\u3046\u307e\u304f\u3044\u304b\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/strong><\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001<strong>position: absolute<\/strong> \u3092\u4f7f\u3063\u3066\u8981\u7d20\u3092\u89aa\u8981\u7d20\u306b\u5bfe\u3057\u3066\u914d\u7f6e\u3057\u3088\u3046\u3068\u3059\u308b\u969b\u306b\u3001\u89aa\u8981\u7d20\u306e\u9ad8\u3055\u3084\u5e45\u304c\u81ea\u52d5\u3067\u8a08\u7b97\u3055\u308c\u308b\u3068\u3001\u305d\u306e\u914d\u7f6e\u304c\u601d\u3044\u901a\u308a\u306b\u3044\u304b\u306a\u3044\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bfe\u51e6\u6cd5\uff1a\u89aa\u8981\u7d20\u3068\u5b50\u8981\u7d20\u306e <strong>width<\/strong> \u3084 <strong>height<\/strong> \u3092\u660e\u78ba\u306b\u6307\u5b9a\u3059\u308b\u3002<\/h4>\n\n\n\n<p>\u7279\u306b\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u306e\u5834\u5408\u306f\u3001\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u3084 <strong>vw<\/strong>\u3001<strong>vh<\/strong> \u306a\u3069\u306e\u5358\u4f4d\u3092\u6d3b\u7528\u3057\u3001\u67d4\u8edf\u306b\u9ad8\u3055\u3068\u5e45\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u30da\u30f3\u535a\u58eb\uff01position\u306eabsolute\u3068relative\u306e\u9055\u3044\u3001\u3088\u304f\u308f\u304b\u308a\u307e\u3057\u305f\uff01<br>\u975e\u5e38\u306b\u308f\u304b\u308a\u3084\u3059\u304b\u3063\u305f\u3067\u3059\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.12.07.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u305d\u3046\u8a00\u3063\u3066\u304f\u308c\u3066\u5b09\u3057\u3044\u9650\u308a\u3058\u3083\uff01absolute \u306f\u201c\u89aa\u3092\u57fa\u6e96\u306b\u7f6e\u304f\u201d\u3001relative \u306f\u201c\u305d\u306e\u5834\u306b\u3044\u306a\u304c\u3089\u898b\u305f\u76ee\u3060\u3051\u30ba\u30e9\u3059\u201d\u3002\u305d\u3057\u3066\u89aa\u306b <code>position: relative;<\/code> \u3092\u4ed8\u3051\u308b\u306e\u304c\u809d\u3058\u3083\u305e\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.06.05.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u65e9\u901f\u81ea\u5206\u306e\u30da\u30fc\u30b8\u3067\u8a66\u3057\u3066\u307f\u307e\u3059\u3002\u30da\u30f3\u535a\u58eb\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>\u307e\u3068\u3081<\/strong><\/h2>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001CSS\u306eposition\u306eabsolute\u3068relative\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>CSS\u306eposition\u30d7\u30ed\u30d1\u30c6\u30a3 \u306f\u3001\u8981\u7d20\u3092\u81ea\u7531\u306b\u30ec\u30a4\u30a2\u30a6\u30c8\u3057\u3001\u4ed6\u306e\u8981\u7d20\u3068\u5e72\u6e09\u3057\u306a\u3044\u3088\u3046\u306b\u914d\u7f6e\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u8981\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-big_icon_point\"><strong>relative\u306e\u7279\u5fb4<\/strong><br>\u8981\u7d20\u81ea\u8eab\u306e\u5143\u306e\u4f4d\u7f6e\u3092\u57fa\u6e96\u306b\u3057\u3066\u3001\u4e0a\u4e0b\u5de6\u53f3\u3078\u4f4d\u7f6e\u3092\u5fae\u8abf\u6574\u3067\u304d\u308b\u3002<br><br><strong>absolute\u306e\u7279\u5fb4<\/strong><br>\u89aa\u8981\u7d20 \u3092\u57fa\u6e96\u306b\u3057\u3066\u8981\u7d20\u3092\u6b63\u78ba\u306b\u914d\u7f6e\u53ef\u80fd\u3002<br>\u3088\u308a\u81ea\u7531\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u4f5c\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002<br><br><strong>z-index\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><br>\u8981\u7d20\u306e \u91cd\u306a\u308a\u9806\u3092\u5236\u5fa1 \u3067\u304d\u308b\u3002<br>\u8907\u96d1\u306a\u30c7\u30b6\u30a4\u30f3\u3084\u91cd\u306d\u5408\u308f\u305b\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u52b9\u679c\u7684\u3002<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001position\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u3046\u307e\u304f\u52b9\u304b\u306a\u3044\u5834\u5408\u3082\u3042\u308b\u305f\u3081\u3001\u305d\u306e\u969b\u306f\u4eca\u56de\u89e3\u8aac\u3057\u305f\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\u3092\u53c2\u8003\u306b\u3001<strong><span class=\"swl-marker mark_yellow\">\u8981\u7d20\u306e\u30b9\u30bf\u30a4\u30eb\u8a2d\u5b9a\u3092\u898b\u76f4\u3059\u3053\u3068\u304c\u5927\u5207<\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>CSS\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u3001\u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u8a66\u884c\u932f\u8aa4\u3059\u308b\u3053\u3068\u304c\u3001\u6700\u9069\u306a\u30c7\u30b6\u30a4\u30f3\u306e\u5b9f\u73fe\u306b\u3064\u306a\u304c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"index_id17\">WithCode\u3092\u4f53\u9a13\u3067\u304d\u308b\u521d\u7d1a\u30b3\u30fc\u30b9\u516c\u958b\u4e2d\uff01<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"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=\"\" class=\"wp-image-2650\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">\u521d\u7d1a\u30b3\u30fc\u30b9(\u00a549,800)\u304c\u5b8c\u5168\u7121\u6599\u306b\uff01<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u671f\u9593\uff1a1\u9031\u9593<\/strong><\/li>\n\n\n\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\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\n\n<p>\u672a\u7d4c\u9a13\u3067\u3082\u5fc3\u914d\u3059\u308b\u3053\u3068\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\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<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<\/strong> <strong>\u2192<\/strong><\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>CSS\u3067\u8981\u7d20\u306e\u914d\u7f6e\u304c\u601d\u3044\u901a\u308a\u306b\u3044\u304b\u306a\u3044\u3001\u305d\u3093\u306a\u60a9\u307f\u3092\u62b1\u3048\u3066\u3044\u307e\u305b\u3093\u304b\uff1f \u7279\u306b position: relative \u3068 absolute \u306e\u9055\u3044\u3084\u4f7f\u3044\u5206\u3051\u304c\u5206\u304b\u3089\u306a\u3044\u3068\u3001\u601d\u3044\u901a\u308a\u306b\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u8abf\u6574\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u3002\u3057\u304b [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":7179,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"swell_btn_cv_data":"","footnotes":""},"categories":[34,361],"tags":[37,61,68,250,251],"class_list":["post-7176","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming","category-css","tag-programming","tag-css","tag-html","tag-absolute","tag-relative"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/7176","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/comments?post=7176"}],"version-history":[{"count":11,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/7176\/revisions"}],"predecessor-version":[{"id":10944,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/posts\/7176\/revisions\/10944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/media\/7179"}],"wp:attachment":[{"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/media?parent=7176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/categories?post=7176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/withcode.tech\/media\/wp-json\/wp\/v2\/tags?post=7176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}