{"id":6568,"date":"2019-04-22T10:26:03","date_gmt":"2019-04-22T01:26:03","guid":{"rendered":"https:\/\/y-com.info\/contents\/?p=6568"},"modified":"2021-12-15T12:49:43","modified_gmt":"2021-12-15T03:49:43","slug":"%e5%89%8d%e3%81%8b%e3%82%89%e3%80%81%e5%be%8c%e3%82%8d%e3%81%8b%e3%82%89%e4%bd%95%e7%95%aa%e7%9b%ae%e3%81%a8%e3%81%8b%e3%80%81%e4%bd%95%e5%80%8b%e5%88%86%e3%81%a8%e3%81%8b%e3%82%92%e3%82%b9%e3%82%bf","status":"publish","type":"post","link":"https:\/\/y-com.info\/contents\/?p=6568","title":{"rendered":"CSS\u3067\u4f55\u756a\u76ee\u3084\u4f55\u500b\u5206\u3092\u524d\u304b\u3089\u3001\u5f8c\u308d\u304b\u3089\u81ea\u7531\u81ea\u5728\u306b\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u7591\u4f3c\u8981\u7d20\u307e\u3068\u3081"},"content":{"rendered":"<p><span class=\"anchor\"><a id=\"anc_01\"><\/a><\/span><\/p>\n<section class=\"entry__section\">\n\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3067\u306f\u3001\u8981\u7d20\u306e\u4f55\u756a\u76ee\u3060\u3051\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3059\u308b\u3063\u3066\u3044\u3046\u3053\u3068\u304c\u7c21\u5358\u306b\u3067\u304d\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001&lt;p&gt;\u30bf\u30b0\u3068\u304b\u4f7f\u3063\u3066\u3044\u308b\u3068\u6700\u5f8c\u306e\uff11\u884c\u306f\u30de\u30fc\u30b8\u30f3\u3092\u53d6\u308a\u305f\u304f\u306a\u3044\u3063\u3066\u3044\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u305b\u3093\u304b\u3002<br \/>\n\u5546\u54c1\u306e\u30e9\u30a4\u30f3\u30ca\u30c3\u30d7\u306a\u3069\u3067\u7e26\u6a2a\u306b\u8981\u7d20\u3092\u4e26\u3079\u3066\u3044\u308b\u6642\u3082\u3001\uff11\u756a\u6700\u5f8c\u306e\u5217\u306f\u30de\u30fc\u30b8\u30f3\u3092\u53d6\u308a\u305f\u304f\u306a\u3044\u3063\u3066\u3044\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u305d\u3093\u306a\u6642\u306b\u3001\u30af\u30e9\u30b9\u540d\u3092\u6307\u5b9a\u3057\u3066\u30de\u30fc\u30b8\u30f3\u3092\u6d88\u3059\u3068\u304b\u305d\u3046\u3044\u3063\u305f\u3053\u3068\u3092\u3059\u308b\u4eba\u3082\u307e\u3060\u3044\u307e\u3059\u3088\u306d\u3002<br \/>\n\u305d\u3093\u306a\u3053\u3068\u3092\u3057\u306a\u304f\u3066\u3082\u3001<strong>\u524d\u304b\u3089\u4f55\u756a\u76ee\u3068\u304b\u524d\u304b\u3089\u4f55\u500b\u5206\u3068\u304b\u305d\u3046\u3044\u3063\u305f\u6307\u5b9a\u304c\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3067\u7c21\u5358\u306b\u3067\u304d\u307e\u3059<\/strong>\u3002<br \/>\n\u3088\u304f\u4f7f\u3046\u3093\u3060\u3051\u3069\u3001\u305f\u307e\u306b\u5fd8\u308c\u3066\u3057\u307e\u3046\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3067\u4f55\u756a\u76ee\u7684\u306a\u6307\u5b9a\u306e\u4ed5\u65b9\u3092\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002<br \/>\n\u500b\u4eba\u7684\u306b\u5fd8\u308c\u308b\u3053\u3068\u591a\u3044\u306e\u3067\u3001\u5099\u5fd8\u306e\u70ba\u306b\u3082\u66f8\u3044\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<table class=\"visual\">\n<thead>\n<th><\/th>\n<th>-child<\/th>\n<th>-of-type<\/th>\n<\/thead>\n<tbody>\n<tr>\n<th>\u6700\u521d<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/1.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" style=\"margin:5px 0 0 0;\" \/><\/th>\n<td>:first-child<\/td>\n<td>:first-of-type<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u5f8c<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/2.png\" style=\"margin:5px 0 0 0;\" alt=\"2\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6578\" \/><\/th>\n<td>:last-child<\/td>\n<td>:last-of-type<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u521d\u304b\u3089X\u756a\u76ee<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/3.png\" style=\"margin:5px 0 0 0;\" alt=\"3\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6582\" \/><\/th>\n<td>:nth-child(X)<\/td>\n<td>:nth-of-type(X)<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u5f8c\u304b\u3089X\u756a\u76ee<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/4.png\" style=\"margin:5px 0 0 0;\" alt=\"4\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6583\" \/><\/th>\n<td>:nth-last-child(X)<\/td>\n<td>:nth-last-of-type(X)<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u521d\u304b\u3089X\u500b<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/5.png\" style=\"margin:5px 0 0 0;\" alt=\"5\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6584\" \/><\/th>\n<td>:nth-child(-n+X)<\/td>\n<td>:nth-of-type(-n+X)<\/td>\n<\/tr>\n<tr>\n<th>X\u756a\u304b\u3089\u6700\u5f8c<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/6.png\" style=\"margin:5px 0 0 0;\" alt=\"6\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6585\" \/><\/th>\n<td>:nth-child(n+X)<\/td>\n<td>:nth-of-type(n+X)<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u5f8c\u304b\u3089X\u500b<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/7.png\" style=\"margin:5px 0 0 0;\" alt=\"7\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6586\" \/><\/th>\n<td>:nth-last-child(-n+X)<\/td>\n<td>:nth-last-of-type(-n+X)<\/td>\n<\/tr>\n<tr>\n<th>\u6700\u5f8c\u304b\u3089X\u756a\u304b\u3089\u4ee5\u524d<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/8.png\" style=\"margin:5px 0 0 0;\" alt=\"8\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6587\" \/><\/th>\n<td>:nth-last-child(n+X)<\/td>\n<td>:nth-last-of-type(n+X)<\/td>\n<\/tr>\n<tr>\n<th>X\u306e\u500d\u6570<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/91.png\" style=\"margin:5px 0 0 0;\" alt=\"9\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6593\" \/><\/th>\n<td>:nth-child(Xn)<\/td>\n<td>:nth-of-type(Xn)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u308f\u304b\u308a\u3084\u3059\u304f\u307e\u3068\u3081\u305f\u3064\u3082\u308a\u306a\u306e\u3067\u3001\u3042\u308b\u7a0b\u5ea6\u308f\u304b\u3063\u3066\u308b\u4eba\u306f\u3053\u306e\u8868\u304c\u3042\u308c\u3070\u5099\u5fd8\u7528\u306b\u306f\u5145\u5206\u3060\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u3053\u3053\u304b\u3089\u4e0b\u306f\u3001\u521d\u5fc3\u8005\u306e\u305f\u3081\u306b\u88dc\u8db3\u7684\u306b\u8aac\u660e\u5165\u308c\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<h2 class=\"section__title\">-child \u3068 -of-type\u306e\u9055\u3044\u306e\u8a71<\/h2>\n<p>\u3053\u306e\u7279\u5b9a\u306e\u8981\u7d20\u306b\u5bfe\u3059\u308b\u6307\u5b9a\u306e\u65b9\u6cd5\u306f\u5927\u304d\u304f2\u3064\u306e\u6307\u5b9a\u65b9\u6cd5\u304c\u3042\u3063\u3066\u3001<strong>\u8981\u7d20\u540d\u3064\u307e\u308a\u306f\u30bf\u30b0\u306e\u7a2e\u985e\u306b\u304b\u304b\u308f\u3089\u305a\u5bfe\u8c61<\/strong>\u3068\u3059\u308b\u65b9\u6cd5\u3068\u3001<strong>\u7279\u5b9a\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u3060\u3051\uff08&lt;P&gt;\u3060\u3051\u3068\u304b\uff09\u5bfe\u8c61\u3068\u3059\u308b\u65b9\u6cd5<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n<strong>-child\u306f\u8981\u7d20\u306e\u7a2e\u985e\u306b\u304b\u304b\u308f\u3089\u305a\u5168\u3066\u3092\u5bfe\u8c61<\/strong>\u3068\u3057\u3066\u3001<strong>-of-type\u306f\u7279\u5b9a\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u3060\u3051\u5bfe\u8c61<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u306d\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/type.png\" alt=\"type\" width=\"613\" height=\"149\" class=\"alignnone size-full wp-image-6596\" srcset=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/type.png 613w, https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/type-600x146.png 600w\" sizes=\"auto, (max-width: 613px) 100vw, 613px\" \/><\/p>\n<p>\u56f3\u3092\u898b\u3066\u3082\u3089\u3063\u305f\u3089\u308f\u304b\u308b\u3088\u3046\u306b\u3001\u9ec4\u8272\u3044\u306e\u304c\u5bfe\u8c61\u306b\u306a\u308b\u8981\u7d20\u3067\u3059\u3002<br \/>\n<strong>\u8907\u6570\u306e\u8981\u7d20\u304c\u6df7\u5728\u3057\u3066\u3082\u3001-child\u3067\u306f\u3059\u3079\u3066\u306e\u8981\u7d20\u304c\u5bfe\u8c61<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n<strong>-of-type\u3067\u306f\u3001\u305d\u306e\u4e2d\u306e\u7279\u5b9a\u306e\u8981\u7d20\uff08\u30bf\u30b0\uff09\u304c\u5bfe\u8c61<\/strong>\u3067\u3059\u3002<br \/>\n\u8aac\u660e\u3060\u3051\u3067\u306f\u308f\u304b\u308a\u306b\u304f\u3044\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u8aac\u660e\u3067\u306e\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u7c21\u5358\u306b\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<h2 class=\"section__title\">\u6700\u521d\u306e\u8981\u7d20\u3084\u6700\u5f8c\u306e\u8981\u7d20\u306b\u30b9\u30bf\u30a4\u30eb\u306e\u6307\u5b9a\u3092\u3059\u308b<\/h2>\n<h3 class=\"point__title\">:first-child \/ :first-of-type<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/1.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" \/><\/h3>\n<h3 class=\"point__title\">:last-child \/ :last-of-type<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/2.png\" alt=\"2\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6578\" \/><\/h3>\n<p><strong>\u5148\u982d\u3084\u6700\u5f8c\u306e\u8981\u7d20\u3060\u3051\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a<\/strong>\u3059\u308b\u5834\u5408\u306f\u3053\u308c\u3092\u4f7f\u3044\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3059\u3054\u304f\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u306d\u3001\u8981\u7d20\u304c\u3044\u304f\u3064\u304b\u4e26\u3093\u3067\u3044\u308b\u3068\u304d\u306b1\u756a\u5148\u982d\u306b\u5bfe\u3057\u3066\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3057\u305f\u308a\u30011\u756a\u5f8c\u308d\u306b\u5bfe\u3057\u3066\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u5177\u4f53\u7684\u306b\u306f\u3053\u3046\u3044\u3063\u305f\u66f8\u304d\u65b9\u3092\u3057\u307e\u3059<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np:first-child{\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\np:first-of-type{\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p>\u5b9f\u306f\u7c21\u5358\u306a\u3088\u3046\u306b\u601d\u3048\u3066\u3001\u3053\u306e\uff12\u3064\u306e\u610f\u5473\u5408\u3044\u304c\u306a\u304b\u306a\u304b\u96e3\u3057\u3044\u3002<br \/>\n\u305d\u308c\u305e\u308c\u306e\u610f\u5473\u5408\u3044\u3092\u7b54\u3048\u3089\u308c\u307e\u3059\u304b\uff1f<br \/>\n\u307e\u305a\u3053\u3061\u3089<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np:first-child{\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p>\u3053\u308c\u306f\u3069\u3046\u3044\u3046\u610f\u5473\u304b\u3068\u3044\u3046\u3068\u3001<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/fchild.png\" alt=\"fchild\" width=\"646\" height=\"63\" class=\"alignnone size-full wp-image-6608\" srcset=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/fchild.png 646w, https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/fchild-600x59.png 600w\" sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><br \/>\n<strong>-child\u306e\u6307\u5b9a\u65b9\u6cd5\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u3001:first-child\u3068\u306f\u8981\u7d20\u306e\u7a2e\u985e\u306b\u304b\u304b\u308f\u3089\u305a\u4e00\u756a\u5148\u982d\u304c\u5bfe\u8c61<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u4e0a\u306e\u56f3\u306e\u8d64\u3044\u67a0\u306e\u90e8\u5206\u304c\u5bfe\u8c61\u3068\u3044\u3046\u3053\u3068\u3002<br \/>\n<strong>\u305d\u306e\u8981\u7d20\u304c&lt;p&gt;\u3067\u3042\u308c\u3070\u30b9\u30bf\u30a4\u30eb\u304c\u6307\u5b9a<\/strong>\u3055\u308c\u307e\u3059\u3002<br \/>\n\u4e0a\u306e\u4f8b\u3067\u306f<strong>&lt;div&gt;\u306a\u306e\u3067\u3001\u30b9\u30bf\u30a4\u30eb\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093<\/strong>\u3002<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np:first-of-type{\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/tchild.png\" alt=\"tchild\" width=\"646\" height=\"63\" class=\"alignnone size-full wp-image-6609\" srcset=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/tchild.png 646w, https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/tchild-600x59.png 600w\" sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><br \/>\n\u3053\u3061\u3089\u306f\u3001<strong>-of-type\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u5bfe\u8c61\u306f\u5148\u982d\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b&lt;p&gt;\u8981\u7d20<\/strong>\u306e\u307f\u3002<br \/>\n\u56f3\u306e\u8d64\u67a0\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u3053\u308d\u3067\u3059\u3002<br \/>\n<strong>:first-of-type\u306f\u305d\u306e\u4e2d\u3067\u5148\u982d\u306e\u3082\u306e\u304c&lt;p&gt;\u8981\u7d20\u3067\u3042\u308c\u3070\u9069\u7528<\/strong>\u3055\u308c\u307e\u3059\u3002<br \/>\n\u3082\u3061\u308d\u3093\u3001\u5bfe\u8c61\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306b\u306f&lt;p&gt;\u8981\u7d20\u306e\u306f\u305a\u306a\u306e\u3067\u30b9\u30bf\u30a4\u30eb\u304c\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u610f\u5473\u306e\u611f\u3058\u308f\u304b\u308a\u307e\u3059\u304b\u306d\u3002<br \/>\n\u4ee5\u4e0b\u3059\u3079\u3066\u540c\u3058\u3088\u3046\u306a\u8003\u3048\u65b9\u3067\u3059\u3002<\/p>\n<h2 class=\"section__title\">\u5148\u982d\u304b\u3089X\u756a\u76ee\u306e\u8981\u7d20\u306b\u30b9\u30bf\u30a4\u30eb\u306e\u6307\u5b9a\u3092\u3059\u308b<\/h2>\n<h3 class=\"point__title\">:nth-child(X) \/ :nth-of-type(X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/3.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" \/><\/h3>\n<h3 class=\"point__title\">:nth-last-child(X) \/ :nth-last-of-type(X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/4.png\" alt=\"2\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6578\" \/><\/h3>\n<p>\u5148\u307b\u3069\u306f\u5148\u982d\u3001\u3068\u304b\u6700\u5f8c\u5c3e\u3068\u3044\u3063\u305f\u3082\u306e\u3060\u3063\u305f\u3051\u308c\u3069\u3001\u3082\u3046\u5c11\u3057\u6c4e\u7528\u7684\u306b<strong>\u524d\u304b\u3089\uff08\u5f8c\u308d\u304b\u3089\uff09\u4f55\u756a\u76ee<\/strong>\u3068\u3044\u3046\u6307\u5b9a\u65b9\u6cd5\u304c\u3053\u308c\u3067\u3059\u3002<br \/>\n\u5148\u982d\u304b\u3089X\u756a\u76ee\u3068\u304b\u3001\u5f8c\u308d\u304b\u3089X\u756a\u76ee\u304c\u7c21\u5358\u306b\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<br \/>\n\u203bX\u3092\uff11\u306b\u3059\u308c\u3070\u3001\u5148\u982d\u3068\u304b\u6700\u5f8c\u5c3e\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308b\u306e\u3067\u3001\u3055\u304d\u307b\u3069\u306e:first-child\u306a\u3069\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u306d<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np::nth-child(3){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\np:nth-of-type(3){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p>p::nth-child(3) \u3068\u3044\u3046\u306e\u306f\u3001<strong>\u7a2e\u985e\u306b\u95a2\u308f\u3089\u305a\u524d\u304b\u3089\uff13\u756a\u76ee\u306e\u8981\u7d20\u304c&lt;p&gt;\u8981\u7d20\u3067\u3042\u308c\u3070\u305d\u3053\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a<\/strong>\u3002<br \/>\np:nth-of-type(3)\u3000\u306f\u3001<strong>\u524d\u304b\u3089\uff13\u56de\u76ee\u306b\u51fa\u73fe\u3059\u308b&lt;p&gt;\u8981\u7d20\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a<\/strong>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<h2 class=\"section__title\">\u9023\u7d9a\u3059\u308b\u8907\u6570\u500b\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3092\u3059\u308b<\/h2>\n<h3 class=\"point__title\">:nth-child(-n+X) \/ :nth-of-type(-n+X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/5.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" \/><\/h3>\n<h3 class=\"point__title\">:nth-child(n+X) \/ :nth-of-type(n+X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/6.png\" alt=\"2\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6578\" \/><\/h3>\n<h3 class=\"point__title\">:nth-last-child(-n+X) \/ :nth-last-of-type(-n+X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/7.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" \/><\/h3>\n<h3 class=\"point__title\">:nth-last-child(n+X) \/ :nth-last-of-type(n+X)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/8.png\" alt=\"2\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6578\" \/><\/h3>\n<p>\u6b21\u306f\u3001\uff11\u3064\u3067\u306f\u306a\u304f<strong>\u8907\u6570\u500b\u306e\u8981\u7d20\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a<\/strong>\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<br \/>\n\u3053\u308c\u307e\u3067\u3068\u540c\u3058\u304f\u3001<strong>\u5148\u982d\u304b\u3089\u6570\u3048\u308b\u306e\u304b\u6700\u5f8c\u5c3e\u304b\u3089\u6570\u3048\u308b\u306e\u304b\u3068\u3044\u3046\uff12\u3064\u306e\u30d1\u30bf\u30fc\u30f3<\/strong>\u306e\u6307\u5b9a\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u305d\u308c\u306b\u52a0\u3048\u3066\u3001<strong>\u57fa\u6e96\u3068\u3057\u305f\u4f4d\u7f6e\u304b\u3089\u524d\u306b\u5411\u304b\u3046\u306e\u304b\u3001\u5f8c\u308d\u306b\u5411\u304b\u3046\u306e\u304b\u3068\u3044\u3046\uff12\u30d1\u30bf\u30fc\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u8a084\u901a\u308a<\/strong>\u3002<\/p>\n<p>\u307e\u305a\u306f\u5148\u982d\u304b\u3089\u6570\u3048\u308b\u5834\u5408\u3001<strong>\u57fa\u6e96\u3068\u306a\u308b\u4f4d\u7f6e\u3092X\u756a\u76ee\u3068\u3057\u3066\u6307\u5b9a<\/strong>\u3057\u307e\u3059\u3002<br \/>\n\u305d\u306e<strong>\u57fa\u6e96\u5024\u304b\u3089\u5148\u982d\u306b\u5411\u304b\u3066\u9078\u629e\uff08X\u4f4d\u7f6e\u3092\u57fa\u6e96\u3068\u3057\u3066\u5de6\u5074\uff09\u3059\u308b\u306e\u304c :nth-child(-n+X) \u3068\u3044\u3063\u305f\u6307\u5b9a<\/strong>\u3002<br \/>\n\u305d\u306e<strong>\u57fa\u6e96\u5024\u304b\u3089\u5f8c\u308d\u306b\u5411\u304b\u3063\u3066\u9078\u629e\uff08X\u4f4d\u7f6e\u3092\u57fa\u6e96\u3068\u3057\u3066\u53f3\u5074\uff09\u3059\u308b\u306e\u304c :nth-child(n+X) \u3068\u3044\u3063\u305f\u8a2d\u5b9a<\/strong>\u3067\u3059\u3002<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np:nth-child(-n+3){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\np:nth-of-type(-n+3){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p>p:nth-child(-n+3) \u306f\u3001<strong>\u7a2e\u985e\u306b\u304b\u304b\u308f\u3089\u305a\u5148\u982d\u304b\u3089\uff13\u3064\u306e\u3046\u3061&lt;p&gt;\u8981\u7d20<\/strong>\u3067\u3042\u308b\u3082\u306e\u3002<br \/>\np:nth-of-type(-n+3) \u306f\u3001<strong>\u5148\u982d\u304b\u3089&lt;p&gt;\u8981\u7d20\uff13\u3064<\/strong>\u304c\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n\u4ed6\u306e3\u3064\u306e\u6307\u5b9a\u65b9\u6cd5\u3082\u3001\u524d\u304b\u3089\u6570\u3048\u308b\u304b\u5f8c\u308d\u304b\u3089\u6570\u3048\u308b\u304b\u3002<br \/>\n\u307e\u305f\u3001\u57fa\u6e96\u70b9\u3088\u308a\u524d\u3092\u5bfe\u8c61\u3068\u3059\u308b\u306e\u304b\u5f8c\u308d\u3092\u5bfe\u8c61\u3068\u3059\u308b\u306e\u304b\u3068\u3044\u3063\u305f\u9055\u3044\u3067\u3059\u306d\u3002<\/p>\n<h2 class=\"section__title\">\u7279\u5b9a\u306e\u500d\u6570\u306e\u4f4d\u7f6e\u306e\u8981\u7d20\u306b\u30b9\u30bf\u30a4\u30eb\u306e\u6307\u5b9a\u3092\u3059\u308b<\/h2>\n<h3 class=\"point__title\">:nth-child(Xn) \/ :nth-of-type(Xn)<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/y-com.info\/contents\/wp-content\/uploads\/2019\/04\/91.png\" alt=\"1\" width=\"265\" height=\"25\" class=\"alignnone size-full wp-image-6570\" \/><\/h3>\n<p>\uff12\u306e\u500d\u6570\u3084\uff13\u306e\u500d\u6570\u306a\u3069\u3001<strong>\u7279\u5b9a\u306e\u500d\u6570\u306e\u5834\u6240\u306b\u3042\u308b\u8981\u7d20<\/strong>\u306e\u307f\u3092\u5bfe\u8c61\u3068\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<br \/>\n\u7e26\u6a2a\u306b\u914d\u5217\u3055\u308c\u305f\u8981\u7d20\u3068\u304b\u306f\u3001\u3053\u306e\u500d\u6570\u306e\u6307\u5b9a\u3092\u4f7f\u3063\u305f\u308a\u3057\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\uff13\u5217\u3067\u7e26\u306b\u4e26\u3093\u3060\u8981\u7d20\u306e\u4e00\u756a\u53f3\u306b\u306fmargin\u3092\u6307\u5b9a\u3057\u305f\u304f\u306a\u3044\u3068\u3044\u3063\u305f\u5834\u5408\u30013\u306e\u500d\u6570\u306e\u307f\u306bmargin\u30920\u3068\u3059\u308b\u3088\u3046\u306a\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\np:nth-child(3n){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\np:nth-of-type(3n){\r\n    \/* \u3053\u3053\u306b\u30b9\u30bf\u30a4\u30eb *\/\r\n}\r\n<\/pre>\n<p>p:nth-child(3n)\u306f\u3001<strong>\u5148\u982d\u304b\u30893\u306e\u500d\u6570\u306e\u4f4d\u7f6e\u306b\u3042\u308b\u8981\u7d20\u304c&lt;p&gt;\u8981\u7d20\u3067\u3042\u308c\u3070\u6307\u5b9a<\/strong>\u3002<br \/>\np:nth-of-type(3n)\u306f\u3001<strong>&lt;p&gt;\u8981\u7d20\u3060\u3051\u3092\u5bfe\u8c61\u3068\u3057\u30663\u306e\u500d\u6570\u306e&lt;p&gt;\u8981\u7d20\u306b\u6307\u5b9a<\/strong>\u3055\u308c\u308b\u3002<br \/>\n\u3053\u306e:nth-child\u3068\u3044\u3046\u306e\u306f\u4f55\u5ea6\u3082\u51fa\u3066\u304d\u3066\u3044\u308b\u3088\u306d\u3002<br \/>\n\u5ff5\u306e\u305f\u3081\u66f8\u3044\u3066\u304a\u304f\u3068\u3001\u3053\u308c\u3082<strong>\u9006\u304b\u3089\u6570\u3048\u305f\u3051\u308c\u3070 :nth-last-child(Xn) \u3068\u304b\u304c\u4f7f\u3048\u307e\u3059<\/strong>\u3002<br \/>\n\u307e\u305f\u3001<strong>2n+1 \u3068\u3044\u3063\u305f\u3082\u306e\u306f2\u306e\u500d\u6570\uff08\u5076\u6570\uff09\u306b1\u3092\u8db3\u3057\u305f\u4f4d\u7f6e\u306a\u306e\u3067\u5947\u6570<\/strong>\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<p>\u8efd\u304f\u5099\u5fd8\u7528\u306b\u66f8\u3053\u3046\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u6c17\u304c\u3064\u3051\u3070\u7d50\u69cb\u3057\u3063\u304b\u308a\u3068\u3057\u305f\u8a18\u4e8b\u3092\u66f8\u3044\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<br \/>\n\u3088\u304f\u3001\uff11\u756a\u6700\u5f8c\u306e\u8981\u7d20\u3068\u304b\u3001\uff11\u3064\u3054\u3068\u306e\u8981\u7d20\u306b\u30af\u30e9\u30b9\u3092\u3064\u3051\u3066\u30af\u30e9\u30b9\u540d\u3067\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u4eba\u3092\u898b\u304b\u3051\u307e\u3059\u3002<br \/>\n\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u7591\u4f3c\u8981\u7d20\u306e\u6307\u5b9a\u65b9\u6cd5\u3092\u4f7f\u3048\u3070\u7279\u5b9a\u306e\u8981\u7d20\u306b\u7c21\u5358\u306b\u30b9\u30bf\u30a4\u30eb\u306e\u6307\u5b9a\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u3067\u306f\u89e3\u50cf\u5ea6\u306b\u3088\u3063\u3066\u8981\u7d20\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u3088\u304f\u5909\u308f\u308b\u306e\u3067\u3001\u305d\u308c\u306b\u67d4\u8edf\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u304f\u306b\u306f\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u7591\u4f3c\u8981\u7d20\u306f\u5927\u5909\u4fbf\u5229\u3067\u3059\u3002<br \/>\n\u77e5\u3089\u306a\u304b\u3063\u305f\u4eba\u306f\u3001\u305c\u3072\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u306d\u3002<\/p>\n<p>\u3042\u30681\u9031\u9593\u3067\u30b4\u30fc\u30eb\u30c7\u30f3\u30a6\u30a3\u30fc\u30af\u3002<br 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