{"id":1495,"date":"2017-08-25T18:19:02","date_gmt":"2017-08-25T09:19:02","guid":{"rendered":"https:\/\/webst8.com\/code\/?p=1495"},"modified":"2024-08-01T12:33:47","modified_gmt":"2024-08-01T03:33:47","slug":"css-fake-class-element","status":"publish","type":"post","link":"https:\/\/webst8.com\/code\/css-fake-class-element\/","title":{"rendered":"CSS\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u304a\u3088\u3073\u4f75\u7528\u53ef\u5426\u306b\u3064\u3044\u3066"},"content":{"rendered":"<p>\u3053\u3053\u3067\u306f\u3001\u77e5\u3063\u3066\u304a\u304d\u305f\u3044CSS\u306e\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u306e\u57fa\u672c\u3068\u4f75\u7528\u53ef\u5426\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p><div class=\"webst-sns-follow-container\">\n<div class=\"webst-sns-follow-title\">SNS\u30d5\u30a9\u30ed\u30fc\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u3057\u307e\u3059\uff01<\/p>\n<p><span style=\"font-size: 11px;\">\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u3084\u3001\u3088\u308a\u8a73\u7d30\u306a\u89e3\u8aac\u3092\u52d5\u753b\u3084\u30b7\u30e7\u30fc\u30c8\u52d5\u753b\u3067\u304a\u5c4a\u3051\u3057\u3066\u3044\u307e\u3059\u3002\u65e5\u3005\u306e\u60c5\u5831\u53ce\u96c6\u306b\u304a\u5f79\u7acb\u3066\u304f\u3060\u3055\u3044\u3002<\/span><\/div>\n<div class=\"webst-sns-follow-row\"><a class=\"webst-sns-button webst-sns-youtube\" href=\"https:\/\/www.youtube.com\/@webst8356\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone size-full wp-image-70744\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-youtube.png\" alt=\"\" width=\"737\" height=\"289\" \/><\/a><\/div>\n<div class=\"webst-sns-follow-row\"><a class=\"webst-sns-button webst-sns-instagram\" href=\"https:\/\/www.instagram.com\/webst8_com\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone size-full wp-image-70741\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-instagram.png\" alt=\"\" width=\"250\" height=\"315\" \/><\/a><br \/>\n<a class=\"webst-sns-button webst-sns-tiktok\" href=\"https:\/\/www.tiktok.com\/@webst8_com\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone size-full wp-image-70742\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-tiktok.png\" alt=\"\" width=\"214\" height=\"305\" \/><\/a><br \/>\n<a class=\"webst-sns-button webst-sns-twitter-x\" href=\"https:\/\/x.com\/mattsunkei\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone size-full wp-image-70743\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-x.png\" alt=\"\" width=\"219\" height=\"301\" \/><\/a><\/div>\n<\/div>\n<\/p>\n<p>&nbsp;<\/p>\n<p><p class=\"text-center\" style=\"max-width:420px;margin:0 auto;\"><b><a href=\"https:\/\/webst8.com\" target=\"_blank\" class=\"webst8-banar-html\" rel=\"noopener noreferrer\">\u3010HTML\u30fbCSS\u3092\u500b\u5225\u6307\u5c0e\u3011<br \/>Web\u30b9\u30af\u30fc\u30eb<\u300cWEBST8\u300d<\/b><br \/><img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2018\/03\/webst8-banar-htmlcss.png\" alt=\"HTML\u30fbCSS \u81ea\u5206\u3067HP\u30fbWeb\u5236\u4f5c\u3057\u305f\u3044\u500b\u4eba\u4e8b\u696d\u4e3b\u69d8\u5411\u3051Web\u30b9\u30af\u30fc\u30eb \u30a6\u30a7\u30d6\u30b9\u30c8\u30a8\u30a4\u30c8\" width=\"336\" height=\"300\" class=\"alignnone size-full wp-image-3702\" style=\"box-shadow:2px 2px 2px rgba(0,0,0,.5)\" \/><\/a><\/p>\n<br \/>\n&nbsp;<\/p>\n<h2>\u4ee3\u8868\u7684\u306a\u64ec\u4f3c\u30af\u30e9\u30b9<\/h2>\n<p><span class=\"text-accent bold\">\u3042\u308b\u8981\u7d20\u304c\u7279\u5b9a\u306e\u72b6\u614b\u306b\u3042\u308b\u3068\u304d\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u306b\u64ec\u4f3c\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/span><br \/>\n&nbsp;<\/p>\n<p>\u4f8b)<\/p>\n<ul>\n<li>\u3042\u308b\u8981\u7d20\u306b\u5bfe\u3057\u3066\u3001\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u72b6\u614b\u306b\u3042\u308b\u6642<\/li>\n<li>\u3042\u308b\u8981\u7d20\u306b\u5bfe\u3057\u3066\u3001\u30ab\u30fc\u30bd\u30eb\u304c\u4e0a\u306b\u4e57\u3063\u3066\u3044\u308b\u6642<\/li>\n<\/ul>\n<p>\u306a\u3069\u306a\u3069\u3002<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u30af\u30e9\u30b9\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"border-primary font-30 padding-10\">\n\u30bb\u30ec\u30af\u30bf:\u64ec\u4f3c\u30af\u30e9\u30b9{<br \/>\n\u3000\u4efb\u610f\u306eCSS\u8a2d\u5b9a<br \/>\n}\n<\/div>\n<p>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u4ee3\u8868\u7684\u306a\u3082\u306e\u3068\u3057\u3066\u30de\u30a6\u30b9\u304c\u3042\u308b\u8981\u7d20\u4e0a\u306b\u8f09\u3063\u305f\u3089\u8272\u3084\u5f62\u3092\u5909\u3048\u308b\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n<div style=\"width: 620px;\" class=\"wp-video\"><!--[if lt IE 9]><script>document.createElement('video');<\/script><![endif]-->\n<video class=\"wp-video-shortcode\" id=\"video-1495-1\" width=\"620\" height=\"202\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4?_=1\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4<\/a><\/video><\/div><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u4ee3\u8868\u7684\u306a\u64ec\u4f3c\u30af\u30e9\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u6700\u521d\u306e\u8981\u7d20 first-child<\/h3>\n<p>\u3042\u308b\u8981\u7d20\u306e\u3046\u3061\u306e<span class=\"text-accent bold\">\u6700\u521d\u306e\u8981\u7d20\u306e\u6307\u5b9a\u3092\u300cfirst-child\u300d<\/span>\u3067\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b(li\u306e\u6700\u521d\u306e\u8981\u7d20)<\/p>\n<pre class=\"lang:default decode:true \">&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      ul li:first-child{\r\n        color:red;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;ul&gt;\r\n      &lt;li&gt;\u6700\u521d\u306eli\u8981\u7d20\u306f\u8d64\u8272\u306b\u306a\u308a\u307e\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n    &lt;\/ul&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-1498\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/first-child.png\" alt=\"CSS \u64ec\u4f3c\u30af\u30e9\u30b9 first-child\" width=\"310\" height=\"134\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/first-child.png 310w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/first-child-300x130.png 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u6700\u5f8c\u306e\u8981\u7d20 last-child<\/h3>\n<p>\u3042\u308b\u8981\u7d20\u306e\u3046\u3061\u3001<span class=\"text-accent bold\">\u6700\u5f8c\u306e\u8981\u7d20\u306e\u6307\u5b9a\u3092\u300clast-child\u300d<\/span>\u3067\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      ul li:last-child{\r\n        color:red;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;ul&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u6700\u5f8c\u306eli\u8981\u7d20\u306f\u8d64\u8272\u306b\u306a\u308a\u307e\u3059&lt;\/li&gt;      \r\n    &lt;\/ul&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" class=\"alignnone wp-image-1500 size-full\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/last-child.png\" alt=\"CSS \u64ec\u4f3c\u30af\u30e9\u30b9 last-child\" width=\"313\" height=\"128\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/last-child.png 313w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/last-child-300x123.png 300w\" sizes=\"(max-width: 313px) 100vw, 313px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>n\u756a\u76ee\u306e\u6307\u5b9a\u65b9\u6cd5 nth-child(\u6570\u5b57)<\/h3>\n<p>\u3042\u308b\u8981\u7d20\u306e\u3046\u3061\u3001<span class=\"text-accent bold\">\u81ea\u5206\u304c\u6307\u5b9a\u3057\u305f\u3044\u4efb\u610f\u306e\u8981\u7d20\u306e\u6307\u5b9a\u3092\u300cnth-child(\u81ea\u5206\u306e\u6307\u5b9a\u3057\u305f\u3044\u6570\u5b57)\u300d<\/span>\u3067\u884c\u3044\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u306a\u304a\u3001<span class=\"bold\">(\u81ea\u5206\u306e\u6307\u5b9a\u3057\u305f\u3044\u6570\u5b57)\u306b\u300ceven\u300d\u3092\u6307\u5b9a\u3059\u308b\u3068\u5076\u6570\u756a\u76ee\u3001\u300codd\u300d\u3092\u6307\u5b9a\u3059\u308b\u3068\u5947\u6570\u756a\u76ee<\/span>\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b(3\u756a\u76ee\u306eli\u8981\u7d20\u3092\u6307\u5b9a)<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      ul li:nth-child(3){\r\n        color:red;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;ul&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n      &lt;li&gt;3\u756a\u76ee\u306eli\u8981\u7d20\u306f\u8d64\u8272\u306b\u306a\u308a\u307e\u3059&lt;\/li&gt;\r\n      &lt;li&gt;\u9ed2\u6587\u5b57\u3067\u3059&lt;\/li&gt;\r\n    &lt;\/ul&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/nth-child3.png\" alt=\"CSS \u64ec\u4f3c\u30af\u30e9\u30b9 nth-child(3)\" width=\"322\" height=\"140\" class=\"size-full wp-image-1502\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/nth-child3.png 322w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/nth-child3-300x130.png 300w\" sizes=\"(max-width: 322px) 100vw, 322px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u6307\u5b9a\u3057\u305f\u64ec\u4f3c\u30af\u30e9\u30b9\u3092\u9664\u5916 :not(\u9664\u5916\u3057\u305f\u3044\u64ec\u4f3c\u30af\u30e9\u30b9)<\/h3>\n<p><span class=\"text-accent bold\">\u6307\u5b9a\u3057\u305f\u64ec\u4f3c\u30af\u30e9\u30b9\u3092\u9664\u5916\u3059\u308b\u306b\u306f\u3001:not(\u9664\u5916\u3057\u305f\u3044\u64ec\u4f3c\u30af\u30e9\u30b9)<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b(\u6700\u5f8c\u306eli\u8981\u7d20:last-child\u3092\u9664\u5916\u3057\u3066\u6587\u5b57\u3092\u8d64\u8272\u306e\u8a2d\u5b9a)<\/p>\n<pre class=\"lang:default decode:true \" >&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      li:not(:last-child){\r\n        color:red;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;ul&gt;\r\n      &lt;li&gt;li\u8981\u7d20&lt;\/li&gt;\r\n      &lt;li&gt;li\u8981\u7d20&lt;\/li&gt;\r\n      &lt;li&gt;li\u8981\u7d20&lt;\/li&gt;\r\n      &lt;li&gt;li\u8981\u7d20&lt;\/li&gt;\r\n    &lt;\/ul&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/li-not-last-child.png\" alt=\"li\u8981\u7d20\u306e\u6700\u5f8c\u306e\u5b50\u8981\u7d20\u3092not\u3067\u9664\u5916\" width=\"327\" height=\"143\" class=\"size-full wp-image-1679\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/li-not-last-child.png 327w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/li-not-last-child-300x131.png 300w\" sizes=\"(max-width: 327px) 100vw, 327px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u672a\u8a2a\u554f\u30ea\u30f3\u30af :link<\/h3>\n<p><span class=\"text-accent bold\">\u307e\u3060\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u3053\u3068\u306e\u306a\u3044\u30ea\u30f3\u30af\uff08\u672a\u8a2a\u554f\u30ea\u30f3\u30af\uff09\u3092:link<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b\uff08\u672a\u8a2a\u554f\u30ea\u30f3\u30af\u3092\u30d4\u30f3\u30af\u8272\uff09 <\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      a:link{\r\n        color:pink;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;a href=\"#\"&gt;\u672a\u8a2a\u554f\u30ea\u30f3\u30af(\u30d4\u30f3\u30af\u8272)&lt;\/a&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/link.png\" alt=\"CSS \u672a\u8a2a\u554f\u30ea\u30f3\u30af :link\" width=\"212\" height=\"52\" class=\"alignleft size-full wp-image-1514\" \/><br \/>\n&nbsp;<\/p>\n<h3>\u8a2a\u554f\u6e08\u307f\u30ea\u30f3\u30af :visited<\/h3>\n<p><span class=\"text-accent bold\">\u3059\u3067\u306b\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u3053\u3068\u304c\u3042\u308b\u30ea\u30f3\u30af\uff08\u8a2a\u554f\u6e08\u307f\u30ea\u30f3\u30af\uff09\u3092:visited<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n    a:link{\r\n      color:pink;\r\n    }\r\n    a:visited{\r\n      color:orange;\r\n    }\r\n      \r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;a href=\"#\"&gt;\u672a\u8a2a\u554f\u30ea\u30f3\u30af(\u30d4\u30f3\u30af\u8272)\u3067\u3059\u304c\u3001\u4e00\u5ea6\u30af\u30ea\u30c3\u30af\u3057\u305f\u5f8c\u3067\u518d\u5ea6\u78ba\u8a8d\u3059\u308b\uff08\u8a2a\u554f\u6e08\u307f\u30ea\u30f3\u30af\uff09\u3068\u3001\u30aa\u30ec\u30f3\u30b8\u8272\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002&lt;\/a&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<div style=\"width: 502px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1495-2\" width=\"502\" height=\"176\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-visited.mp4?_=2\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-visited.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-visited.mp4<\/a><\/video><\/div><br \/>\n&nbsp;<\/p>\n<p>\u306a\u304a\u3001\u8a2a\u554f\u3057\u305f\u304b\u672a\u8a2a\u554f\u304b\u306f\u5404\u30d6\u30e9\u30a6\u30b6\u3054\u3068\u306b\u4fdd\u6301\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001Chrome\u3067\u4e00\u5ea6\u8a2a\u554f\u3057\u3066\u3082\u3001\u540c\u3058PC\u306eSafari\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u672a\u8a2a\u554f\u72b6\u614b\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u30de\u30a6\u30b9\u304c\u4e57\u3063\u3066\u3044\u308b\u6642 :hover<\/h3>\n<p><span class=\"text-accent bold\">\u30de\u30a6\u30b9\u304c\u3042\u308b\u8981\u7d20\u4e0a\u306b\u3042\u308b\u6642\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u300c:hover\u300d<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>a:hover{}\u3092\u6307\u5b9a\u3057\u3066\u30ea\u30f3\u30af\u5148\u306b\u30ab\u30fc\u30bd\u30eb\u3092\u5408\u308f\u3055\u3063\u305f\u72b6\u614b\u306e\u6642\u306b\u8272\u3092\u5909\u3048\u308b\u306a\u3069\u306f\u3088\u304f\u3042\u308b\u4f8b\u3067\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n    a:hover{\r\n      background: pink;\r\n    }\r\n    div{\r\n      background:aqua;\r\n      width: 200px;\r\n      height: 100px;\r\n    }\r\n    div:hover{\r\n      background:pink;\r\n    }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;a href=\"#\"&gt;\u3053\u306e\u6587\u7ae0\u306e\u4e0a\u306b\u30de\u30a6\u30b9\u306e\u30ab\u30fc\u30bd\u30eb\u304c\u4e57\u308b\u3068\u80cc\u666f\u304c\u30d4\u30f3\u30af\u8272\u306b\u306a\u308a\u307e\u3059&lt;\/a&gt;\r\n    &lt;br&gt;&lt;br&gt;&lt;br&gt;\r\n    &lt;div&gt;\r\n      \u3053\u306e\u56db\u89d2\u306e\u4e0a\u306b\u30de\u30a6\u30b9\u306e\u30ab\u30fc\u30bd\u30eb\u304c\u4e57\u308b\u3068\u80cc\u666f\u304c\u6c34\u8272\u2192\u30d4\u30f3\u30af\u306b\u306a\u308a\u307e\u3059\r\n    &lt;\/div&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<div style=\"width: 620px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1495-3\" width=\"620\" height=\"202\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4?_=3\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-hover.mp4<\/a><\/video><\/div><br \/>\n&nbsp;<\/p>\n<p>\u30af\u30ea\u30c3\u30af\u3057\u306a\u304f\u3066\u3082\u30de\u30a6\u30b9\u30ab\u30fc\u30bd\u30eb\u304c\u8981\u7d20\u4e0a\u306b\u3042\u308b\u3060\u3051\u3067hover\u304c\u9069\u7528\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u30de\u30a6\u30b9\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u6642 :active<\/h3>\n<p><span class=\"text-accent bold\">\u30de\u30a6\u30b9\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u6642\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u300c:active\u300d<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n    div{\r\n      background:aqua;\r\n      width: 200px;\r\n      height: 100px;\r\n    }\r\n    div:active{\r\n      background:pink;\r\n    }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;div&gt;\r\n      \u3053\u306e\u56db\u89d2\u306e\u4e0a\u3067\u30de\u30a6\u30b9\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u80cc\u666f\u304c\u6c34\u8272\u2192\u30d4\u30f3\u30af\u306b\u306a\u308a\u307e\u3059\r\n    &lt;\/div&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<div style=\"width: 310px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1495-4\" width=\"310\" height=\"138\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-active.mp4?_=4\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-active.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-active.mp4<\/a><\/video><\/div><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u30d5\u30a9\u30fc\u30ab\u30b9\u3057\u3066\u3044\u308b\u6642\u3000:focus<\/h3>\n<p><span class=\"text-accent bold\">\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306a\u3069\u3067\u30ab\u30fc\u30bd\u30eb\u3092\u7f6e\u3044\u3066\u3044\u308b\uff08\u30d5\u30a9\u30fc\u30ab\u30b9\uff09\u3057\u3066\u3044\u308b\u3068\u304d\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u300c:focus\u300d<\/span>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      input:focus{\r\n        outline:pink auto 5px; \r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;form class=\"\" action=\"index.html\" method=\"post\"&gt;\r\n      &lt;input type=\"text\" name=\"\" placeholder=\"\u30d4\u30f3\u30af\u8272\u306b\u306a\u308a\u307e\u3059\u3002\" value=\"\"&gt;      \r\n    &lt;\/form&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<div style=\"width: 350px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1495-5\" width=\"350\" height=\"126\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-focus.mp4?_=5\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-focus.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-focus.mp4<\/a><\/video><\/div><br \/>\n&nbsp;<\/p>\n<h3>link\u3001visited\u3001hover\u3001active\u306e\u9806\u756a<\/h3>\n<p>4\u3064\u306e\u64ec\u4f3c\u30af\u30e9\u30b9(:link\u3001visited\u3001hover\u3001active)\u306e\u5c11\u3057\u7279\u6b8a\u306a\u4ed5\u69d8\u3068\u3057\u3066\u30014\u3064\u306e\u64ec\u4f3c\u30af\u30e9\u30b9CSS\u306e\u8a18\u8ff0\u9806\u5e8f\u306f\u4e0b\u8a18\u306e\u9806\u756a\u3067\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>a:link<\/li>\n<li>a:visited<\/li>\n<li>a:hover<\/li>\n<li>a:active<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8a18\u8ff0\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >a:link { color:aqua; }\r\na:visited { color:orange; }\r\na:hover { color:red; }\r\na:active { color:purple; }<\/pre>\n<p>&nbsp;<\/p>\n<p>\u9806\u756a\u304c\u4e0a\u8a18\u306e\u9806\u3067\u306a\u3044\u5834\u5408\u306f\u3001\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u306a\u3044\u3068\u3044\u3046\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n&nbsp;<\/p>\n<h2>\u3088\u304f\u4f7f\u3046\u64ec\u4f3c\u8981\u7d20<\/h2>\n<p>\u64ec\u4f3c\u30af\u30e9\u30b9\u306e\u4ed6\u306b\u3001\u64ec\u4f3c\u8981\u7d20\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u8981\u7d20\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"border-primary bold font-30 padding-10\">\n\u30bb\u30ec\u30af\u30bf::\u64ec\u4f3c\u8981\u7d20{<br \/>\n \u4efb\u610f\u306e\u30b9\u30bf\u30a4\u30eb&#8230;<br \/>\n}\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u306a\u304a\u3001<b>\u64ec\u4f3c\u30af\u30e9\u30b9\u304c\u3042\u308b\u8981\u7d20\u304c\u7279\u5b9a\u306e\u72b6\u614b\u306b\u306a\u3063\u305f\u3068\u304d\u306b\u6307\u5b9a\u3059\u308b\u65b9\u5f0f(\u72b6\u614b\u306e\u5909\u5316\u306b\u5bfe\u3059\u308b\u6307\u5b9a\u65b9\u5f0f)\u306a\u306e\u306b\u5bfe\u3057\u3066\u3001<\/b><br \/>\n&nbsp;<\/p>\n<p><span class=\"text-accent bold\">\u64ec\u4f3c\u8981\u7d20\u306f\u3001(\u72b6\u614b\u306e\u5909\u5316\u306b\u95a2\u308f\u3089\u305a)\u8981\u7d20\u306e\u4e00\u90e8\u3092\u8ffd\u52a0\u3067\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/span><br \/>\n&nbsp;<\/p>\n<p>(\u64ec\u4f3c\u8981\u7d20\u3068\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u3044\u3046\u8868\u73fe\u304c\u3084\u3084\u3053\u3057\u3044\u3067\u3059\u306d\u3002\u3002)<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u8981\u7d20\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001HTML\u30b3\u30fc\u30c9\u306b\u4e0d\u8981\u306a\u30bf\u30b0\u3084\u30b3\u30fc\u30c9\u3092\u6e1b\u3089\u3057\u3064\u3064\u3001\u8981\u7d20\u5185\u306e\u7279\u5b9a\u306e\u6587\u5b57\u3084\u884c\u306b\u5bfe\u3057\u3066\u8272\u3005\u306a\u30b9\u30bf\u30a4\u30eb\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u3042\u308b\u8981\u7d20\u5185\u306e\u6700\u521d\u306e\u6587\u5b57<\/h3>\n<p><span class=\"text-accent bold\">\u3042\u308b\u8981\u7d20\u306e\u6700\u521d\u306e\u6587\u5b57\u3060\u3051\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u306b\u306f\u300c::first-letter\u300d<\/span>\u3092\u5229\u7528\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      p::first-letter{\r\n        font-size:30px;\r\n        color:pink;\r\n      }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;p&gt;Q \u8cea\u554f\u3067\u3059\uff01\r\n      &lt;br&gt;\r\n      Q&amp;A\u306a\u3069\u3067\u6700\u521d\u306e\u6587\u5b57\u3060\u3051\u8272\u3092\u5909\u3048\u3066\u6587\u5b57\u3092\u5927\u304d\u304f\u3057\u305f\u3044\u3067\u3059\u3002&lt;\/p&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-firstletter.png\" alt=\"CSS \u64ec\u4f3c\u8981\u7d20 first-letter\" width=\"580\" height=\"146\" class=\"size-full wp-image-1534\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-firstletter.png 580w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-firstletter-300x76.png 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u3042\u308b\u8981\u7d20\u306e\u76f4\u524d\u306b\u4f5c\u6210\u3059\u308b\u64ec\u4f3c\u8981\u7d20 ::before<\/h3>\n<p>\u6700\u8fd1\u306eWeb\u30da\u30fc\u30b8\u3067\u3068\u3066\u3082\u3088\u304f\u4f7f\u3046\u64ec\u4f3c\u8981\u7d20\u306b\u3001before\u3068after\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p><span class=\"text-accent bold\">\u3042\u308b\u8981\u7d20\u306e\u76f4\u524d\u306b\u64ec\u4f3c\u7684\u306a\u8981\u7d20\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u64ec\u4f3c\u8981\u7d20\u300c::before\u300d<\/span>\u3092\u5229\u7528\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u5c11\u3057\u72ec\u7279\u306a\u8a18\u8ff0\u3067\u3059\u304c\u3001<span class=\"bold\">before{}\u306e\u306a\u304b\u306bcontent:&#8217;\u4efb\u610f\u306e\u6587\u5b57&#8217;;<\/span>\u3068\u3044\u3046\u8a18\u8ff0\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<div class=\"border-primary bold font-30 padding-10\">\n\u4efb\u610f\u306e\u30bb\u30ec\u30af\u30bf::before{<br \/>\ncontent:&#8221;;<br \/>\n\u4efb\u610f\u306e\u30b9\u30bf\u30a4\u30eb\u8a2d\u5b9a&#8230;<br \/>\n}\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      .sample-1::before{\r\n        content: '';\r\n        width: 15px;\r\n        height: 15px;\r\n        background: pink;\r\n        display: inline-block;\r\n      }\r\n      .sample-2::before{\r\n        content: '\u2606before\u8981\u7d20\u2606';\r\n        color:red;\r\n      }      \r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;p class=\"sample-1\"&gt;\u30d4\u30f3\u30af\u8272\u306e\u56db\u89d2\u306fp\u306e\u64ec\u4f3c\u8981\u7d20before\u3067\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002&lt;\/p&gt;\r\n    &lt;p class=\"sample-2\"&gt;before\u306econtent\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u6587\u5b57\u3092\u5165\u308c\u308b\u3068\u3001\u305d\u306e\u8981\u7d20\u306e\u76f4\u524d\u306b\u5165\u308c\u305f\u6587\u5b57\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002&lt;\/p&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-before-1.png\" alt=\"CSS \u64ec\u4f3c\u8981\u7d20 before\" width=\"1009\" height=\"120\" class=\"alignleft size-full wp-image-1527\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-before-1.png 1009w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-before-1-300x36.png 300w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-before-1-768x91.png 768w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-before-1-718x85.png 718w\" sizes=\"(max-width: 1009px) 100vw, 1009px\" \/><br \/>\n&nbsp;<\/p>\n<p>\u306a\u304a\u3001before\u3001after\u306f\u30a4\u30f3\u30e9\u30a4\u30f3\u8981\u7d20\u306e\u305f\u3081\u3001width\u3084height\u306a\u3069\u306e\u5927\u304d\u3055\u3092\u8a2d\u5b9a\u3059\u308b\u5834\u5408\u306f\u300cdisplay:block\u307e\u305f\u306fdisplay:inline-block\u300d\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u3042\u308b\u8981\u7d20\u306e\u76f4\u5f8c\u306e\u8981\u7d20<\/h3>\n<p>before\u3068\u307b\u307c\u540c\u3058\u6027\u8cea\u306e\u64ec\u4f3c\u8981\u7d20\u3067\u3001<span class=\"bold text-accent\">\u3042\u308b\u8981\u7d20\u306e\u76f4\u5f8c\u306b\u64ec\u4f3c\u7684\u306a\u8981\u7d20\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u64ec\u4f3c\u8981\u7d20\u300c::after\u300d<\/span>\u3092\u5229\u7528\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8a2d\u5b9a\u4f8b<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      p::before{\r\n        content: '';\r\n        width: 15px;\r\n        height: 15px;\r\n        background: pink;\r\n        display: inline-block;\r\n      }\r\n      p::after{\r\n        content: '';\r\n        width: 15px;\r\n        height: 15px;\r\n        background: aqua;\r\n        display: inline-block;\r\n      }      \r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;p&gt;\u30d4\u30f3\u30af\u8272\u306e\u56db\u89d2\u306fp\u306e\u64ec\u4f3c\u8981\u7d20before\u3067\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002\r\n      &lt;br&gt;\r\n      \u6c34\u8272\u306e\u56db\u89d2\u306fp\u306e\u64ec\u4f3c\u8981\u7d20after\u3067\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002&lt;\/p&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-after.png\" alt=\"CSS \u64ec\u4f3c\u8981\u7d20 after\u3068before\" width=\"712\" height=\"105\" class=\"alignleft size-full wp-image-1526\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-after.png 712w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-after-300x44.png 300w\" sizes=\"(max-width: 712px) 100vw, 712px\" \/><br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>before,after\u306e\u5fdc\u7528\u4f8b<\/h3>\n<p>\u306f\u3058\u3081\u3066before\u3084after\u3092\u5b66\u3073\u51fa\u3059\u3068\u3001\u300c\u3053\u308c\u3063\u3066\u4f7f\u3046\u30b7\u30fc\u30f3\u3042\u308b\u306e\u304b\u306a\uff1f\uff1f\u300d\u3068\u7591\u554f\u306b\u601d\u3046\u65b9\u3082\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<br \/>\n&nbsp;<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u5fdc\u7528\u4f8b\u3068\u3057\u3066\u3001before,after\u3092\u5229\u7528\u3057\u305f\u5fdc\u7528\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<h4>\u6f2b\u753b\u306e\u3088\u3046\u306a\u5439\u304d\u51fa\u3057<\/h4>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306bbefore\u8981\u7d20\u3092\u5229\u7528\u3057\u3066\u6f2b\u753b\u306e\u3088\u3046\u306a\u5439\u304d\u51fa\u3057\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002before\u8981\u7d20\u306f\u5439\u304d\u51fa\u3057\u306e\u4e09\u89d2\u90e8\u5206\u3067\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u25a0\u8868\u793a\u4f8b<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-like-comic.png\" alt=\"CSS before\u3068after\u3092\u4f7f\u3063\u305f\u5fdc\u7528\u4f8b \u6f2b\u753b\u306e\u3088\u3046\u306a\u5439\u304d\u51fa\u3057\" width=\"664\" height=\"340\" class=\"size-full wp-image-1539\" srcset=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-like-comic.png 664w, https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/css-like-comic-300x154.png 300w\" sizes=\"(max-width: 664px) 100vw, 664px\" \/><br \/>\n&nbsp;<\/p>\n<p>\u25a0\u4e0a\u8a18\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n    \r\n    .container{\r\n      width:600px;\r\n      margin: 0 auto;\r\n    }    \r\n    img{\r\n      max-width: 100%;\r\n    }    \r\n    .clearfix::after {\r\n      content: '';\r\n      display: block;\r\n      clear: both;\r\n    }        \r\n    .balloon-primary_chara {\r\n     width:100px;\r\n     float:left;\r\n    }\r\n    .balloon-primary {\r\n      float:left;\r\n      position: relative; \r\n      left: 10px;\r\n      padding: 10px !important;\r\n      background:#d3edfb;\r\n      border-radius: 10px;\r\n    }\r\n    .balloon-primary::before {\r\n      content: '';\r\n      position: absolute;\r\n      width: 0px;\r\n      border-width: 16px;\r\n      border-style: solid;\r\n      border-color: transparent #d3edfb transparent transparent;\r\n      top: 10%;\r\n      left: -30px;\r\n    }\r\n\r\n    .balloon-accent_chara {\r\n     width:100px;\r\n     float:right;\r\n    }\r\n    .balloon-accent {\r\n      float:right;\r\n      position: relative; \r\n      right: 10px;\r\n      padding: 10px !important;\r\n      background:#fff67f;\r\n      border-radius: 10px;\r\n    }\r\n    .balloon-accent::before {\r\n      content: '';\r\n      position: absolute;\r\n      width: 0px;\r\n      border-width: 16px;\r\n      border-style: solid;\r\n      border-color: transparent transparent transparent #fff67f;\r\n      top: 10%;\r\n      right: -30px;\r\n    }\r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    \r\n    &lt;div class=\"container clearfix\"&gt;\r\n      &lt;p class=\"balloon-primary_chara\"&gt;&lt;img src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/boy-sample.png\" alt=\"\"&gt;&lt;\/p&gt;\r\n      &lt;p class=\"balloon-primary\"&gt;\u3084\u3042\u3001\u3053\u3093\u306b\u3061\u306f&lt;\/p&gt;\r\n    &lt;\/div&gt;\r\n    &lt;div class=\"container clearfix\"&gt;\r\n      &lt;p class=\"balloon-accent_chara\"&gt;&lt;img src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/girl-sample.png\" alt=\"\"&gt;&lt;\/p&gt;\r\n      &lt;p class=\"balloon-accent\"&gt;\u306f\u3058\u3081\u307e\u3057\u3066\u3001\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u3057\u307e\u3059\u3002&lt;\/p&gt;\r\n    &lt;\/div&gt;\r\n    \r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>&nbsp;<br \/>\n&nbsp;<\/p>\n<h2>\u64ec\u4f3c\u8981\u7d20\u3068\u64ec\u4f3c\u30af\u30e9\u30b9\u3092\u4e00\u7dd2\u306b\u4f7f\u3048\u308b\u304b\u3001\u4f75\u7528\u53ef\u5426<\/h2>\n<p>\u6700\u5f8c\u306b\u3001\u64ec\u4f3c\u8981\u7d20\u3068\u64ec\u4f3c\u30af\u30e9\u30b9\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u7c21\u5358\u306b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>before\u3084after\u306a\u3069\u306e\u64ec\u4f3c\u8981\u7d20\u306b\u5bfe\u3057\u3066\u64ec\u4f3c\u30af\u30e9\u30b9hover\u3092\u9069\u7528\u3057\u305f\u3044\u306a\u3069\u306e\u5834\u5408\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3057\u307e\u3059\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<br \/>\n&nbsp;<\/p>\n<p><span class=\"bold\">:\u64ec\u4f3c\u30af\u30e9\u30b9::\u64ec\u4f3c\u8981\u7d20\u306f\u52d5\u4f5c\u3059\u308b<\/span><br \/>\n\u4f8b. :hover::after\u306f\u52d5\u4f5c\u3059\u308b<br \/>\n&nbsp;<\/p>\n<p><span class=\"bold\">::\u64ec\u4f3c\u8981\u7d20:\u64ec\u4f3c\u30af\u30e9\u30b9\u306f\u52d5\u4f5c\u3057\u306a\u3044<\/span><br \/>\n\u4f8b. ::after:hover\u306f\u52d5\u4f5c\u3057\u306a\u3044<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<h3>\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u306e\u4f75\u7528\u306e\u4f8b<\/h3>\n<p>\u3053\u3053\u3067\u306f\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306aHTML\u30b5\u30f3\u30d7\u30eb\u3067\u52d5\u4f5c\u3092\u8aac\u660e\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \" >&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n  &lt;head&gt;\r\n    &lt;meta charset=\"utf-8\"&gt;\r\n    &lt;title&gt;\u306f\u3058\u3081\u3066\u306eCSS&lt;\/title&gt;\r\n    &lt;style media=\"screen\"&gt;\r\n      div::before{\r\n      content:\"\u3053\u308c\u306f\u64ec\u4f3c\u8981\u7d20before\u3067\u3059\u3002\";\r\n      border:solid 1px green;\r\n      }\r\n       \r\n      div::after{\r\n      content:\"\u3053\u308c\u306f\u64ec\u4f3c\u8981\u7d20after\u3067\u3059\u3002\";\r\n      border:solid 1px orange;\r\n      }  \r\n    &lt;\/style&gt;\r\n  &lt;\/head&gt;\r\n  &lt;body&gt;\r\n    &lt;div&gt;div\u8981\u7d20&lt;\/div&gt;\r\n  &lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<p>\u4e0a\u8a18\u4f8b\u306b\u5bfe\u3057\u3066<\/p>\n<p><span class=\"bold\">\u64ec\u4f3c\u8981\u7d20:\u64ec\u4f3c\u30af\u30e9\u30b9<br \/>\n\u4f8b. div::after:hover{}<br \/>\n\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u3066\u3082after\u8981\u7d20\u306b\u5bfe\u3057\u3066\u306fhover\u3067\u6307\u5b9a\u3057\u305f\u5185\u5bb9\u304c\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/span><\/p>\n<p>&nbsp;<br \/>\n\u4e00\u65b9\u3001<span class=\"text-accent bold\">\u64ec\u4f3c\u30af\u30e9\u30b9::\u64ec\u4f3c\u8981\u7d20<br \/>\n\u4f8b. div:hover::after<br \/>\n\u306e\u3088\u3046\u306b\u6307\u5b9a\u3059\u308b\u3068after\u8981\u7d20\u306b\u5bfe\u3057\u3066hover\u3067\u6307\u5b9a\u3057\u305f\u5185\u5bb9\u304c\u52d5\u4f5c\u3057\u307e\u3057\u305f\u3002<\/span><\/p>\n<p>&nbsp;<br \/>\n\u52d5\u753b\u3067\u304a\u898b\u305b\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n<div style=\"width: 920px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1495-6\" width=\"920\" height=\"570\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/fake-selector-element.mp4?_=6\" \/><a href=\"https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/fake-selector-element.mp4\">https:\/\/webst8.com\/code\/wp-content\/uploads\/2017\/08\/fake-selector-element.mp4<\/a><\/video><\/div>&nbsp;<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<p>\u53c2\u8003\u30b5\u30a4\u30c8<br \/>\n<a href=\"https:\/\/w3g.jp\/css\/guide\/pseudo\" target=\"_blank\" rel=\"nofollow noopener\">\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20<\/a><br \/>\n&nbsp;<\/p>\n<h2> \u307e\u3068\u3081<\/h2>\n<p>\u307e\u3068\u3081\u3067\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u4eca\u56de\u306f\u3001\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u3001\u304a\u3088\u3073\u305d\u306e\u7d44\u307f\u5408\u308f\u305b\u4f75\u7528\u53ef\u5426\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u30af\u30e9\u30b9\u306f\u3001\u3042\u308b\u8981\u7d20\u304c\u7279\u5b9a\u306e\u72b6\u614b\u306b\u306a\u3063\u305f\u6642\u306b\u6307\u5b9a\u3059\u308b\u30b9\u30bf\u30a4\u30eb\u65b9\u5f0f<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u8981\u7d20\u306f\u3001\u3042\u308b\u8981\u7d20\u306e\u4e00\u90e8\u3092\u6307\u5b9a\u3059\u308b\u30b9\u30bf\u30a4\u30eb\u65b9\u5f0f\u3067\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u306e\u4f75\u7528\u3067\u3059\u304c\u3001<br \/>\n&nbsp;<\/p>\n<p>:\u64ec\u4f3c\u30af\u30e9\u30b9::\u64ec\u4f3c\u8981\u7d20\u306f\u52d5\u4f5c\u3059\u308b(\u4f8b. :hover::after\u306f\u52d5\u4f5c\u3059\u308b)\u306e\u306b\u5bfe\u3057\u3066\u3001<br \/>\n&nbsp;<\/p>\n<p>::\u64ec\u4f3c\u8981\u7d20:\u64ec\u4f3c\u30af\u30e9\u30b9\u306f\u52d5\u4f5c\u3057\u306a\u3044\uff08\u4f8b. ::after:hover\u306f\u52d5\u4f5c\u3057\u306a\u3044\uff09\u3053\u3068\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<br \/>\n&nbsp;<\/p>\n<p>\u3068\u304f\u306b\u64ec\u4f3c\u30af\u30e9\u30b9(:hover)\u3084\u64ec\u4f3c\u8981\u7d20(::before\u3001::after)\u306a\u3069\u306f\u81f3\u308b\u3068\u3053\u308d\u306eWeb\u30da\u30fc\u30b8\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u6700\u521d\u306f\u6163\u308c\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u305c\u3072\u899a\u3048\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u306d\u3002<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n<p>\u4eca\u56de\u306f\u4ee5\u4e0a\u306b\u306a\u308a\u307e\u3059\u3002\u6700\u5f8c\u307e\u3067\u3054\u89a7\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<br \/>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3053\u3067\u306f\u3001\u77e5\u3063\u3066\u304a\u304d\u305f\u3044CSS\u306e\u64ec\u4f3c\u30af\u30e9\u30b9\u3068\u64ec\u4f3c\u8981\u7d20\u306e\u57fa\u672c\u3068\u4f75\u7528\u53ef\u5426\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 &nbsp; &nbsp; &nbsp; \u4ee3\u8868\u7684\u306a\u64ec\u4f3c\u30af\u30e9\u30b9 \u3042\u308b\u8981\u7d20\u304c\u7279\u5b9a\u306e\u72b6\u614b\u306b\u3042\u308b\u3068\u304d\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059 &#8230; <\/p>\n","protected":false},"author":1,"featured_media":1541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[1],"tags":[],"class_list":["post-1495","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-css"],"_links":{"self":[{"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/posts\/1495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/comments?post=1495"}],"version-history":[{"count":20,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/posts\/1495\/revisions"}],"predecessor-version":[{"id":67121,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/posts\/1495\/revisions\/67121"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/media\/1541"}],"wp:attachment":[{"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/media?parent=1495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/categories?post=1495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webst8.com\/code\/wp-json\/wp\/v2\/tags?post=1495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}