{"id":8151,"date":"2021-01-01T13:32:19","date_gmt":"2021-01-01T04:32:19","guid":{"rendered":"https:\/\/fueru.info\/?p=8151"},"modified":"2021-01-01T13:32:19","modified_gmt":"2021-01-01T04:32:19","slug":"css-pseudo-elements-beginner","status":"publish","type":"post","link":"https:\/\/affiblog2019.xsrv.jp\/?p=8151","title":{"rendered":"\u3010\u521d\u5fc3\u8005OK\u3011CSS\u7591\u4f3c\u8981\u7d20\u306e\u7a2e\u985e\u3068\u66f8\u304d\u65b9 \u8d85\u7c21\u5358\u306b\u89e3\u8aac"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u3053\u308c\u304b\u3089CSS\u3092\u52c9\u5f37\u3057\u3066\u307f\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u308b\u65b9\u5411\u3051\u306b\u3001\u8d85\u7c21\u5358\u306b\u565b\u307f\u7815\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002\u3069\u3093\u306a\u611f\u3058\u306a\u306e\u304b\u306a\u3041\uff5e\u3001\u304f\u3089\u3044\u306e\u8208\u5473\u3067\u30aa\u30c3\u30b1\u30fc\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56de\u306f\u300c<span class=\"marker\"><strong>CSS\u306e\u7591\u4f3c\u8981\u7d20\u306b\u3064\u3044\u3066<\/strong>\u300d\u66f8\u3044\u3066\u3044\u307e\u3059\u3002<\/span>\u4eca\u56de\u306e\u7591\u4f3c\u8981\u7d20\u3092\u7406\u89e3\u3057\u3001\u4f7f\u3044\u3053\u306a\u305b\u308b\u3068\u521d\u5fc3\u8005\u304b\u3089\u306f\u8131\u51fa\u3067\u3059\u3002\u306a\u305c\u306a\u3089<span class=\"marker\">CSS\u7591\u4f3c\u8981\u7d20\u3092\u4f7f\u3046\u4e8b\u3067\u3001\u666e\u901a\u3067\u306f\u96e3\u3057\u3044\u8868\u73fe\u304c\u53ef\u80fd\u306b\u306a\u308b\u304b\u3089\u3002<\/span><br \/>\u3053\u3053\u304b\u3089\u5148\u306f\u8868\u73fe\u306e\u5e45\u304c\u683c\u6bb5\u306b\u4e0a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c0f\u96e3\u3057\u3044\u4e8b\u306f\u3042\u3048\u3066\u66f8\u3044\u3066\u307e\u305b\u3093\u304c\u3001\u52c9\u5f37\u9806\u306f\u3001\u57fa\u672c\u30bb\u30ec\u30af\u30bf\u30fc \u2192 \u7591\u4f3c\u30af\u30e9\u30b9 \u2192 \u4eca\u56de\u306e\u300c\u7591\u4f3c\u8981\u7d20\u300d\u304c\u7d76\u5bfe\u304a\u3059\u3059\u3081\u3002<br \/>\u3053\u306e\u9806\u756a\u3067\u3084\u308b\u306e\u304c\u3001\u7406\u89e3\u3092\u65e9\u3081\u308b\u30b3\u30c4\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"supplement blue-border kaisetu\">\n  <div class=\"kaisetu-title\">\n    CSS\u3068\u306fCascading Style Sheets\uff08\u30ab\u30b9\u30b1\u30fc\u30c7\u30a3\u30f3\u30b0\u30fb\u30b9\u30bf\u30a4\u30eb\u30fb\u30b7\u30fc\u30c8\uff09\n  <\/div>\n  <div class=\"inner-contents\">\n    CSS\u3068\u306fCascading Style Sheets\uff08\u30ab\u30b9\u30b1\u30fc\u30c7\u30a3\u30f3\u30b0\u30fb\u30b9\u30bf\u30a4\u30eb\u30fb\u30b7\u30fc\u30c8\uff09\u306e\u4e8b\u3002<strong>web\u30b5\u30a4\u30c8\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u6587\u5b57\u306e\u8272\u306a\u3069\u3001\u898b\u305f\u76ee\u3092\u8abf\u6574\u3059\u308b\u5f79\u5272\u3068\u3057\u3066\u4f7f\u3044\u307e\u3059\u3002<\/strong><br \/>\n\u4e00\u65b9\u3001HTML\u306f\u6587\u66f8\u69cb\u9020\u3092\u69cb\u7bc9\u3059\u308b\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002\u3088\u304f\u300c\u672c\u300d\u306b\u4f8b\u3048\u3089\u308c\u307e\u3059\u3002\n  <\/div>\n<\/div>\n\n\n\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\" style=\"display:block; text-align:center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-4186887910872435\" data-ad-slot=\"4362651766\" data-full-width-responsive=\"false\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">CSS\u30bb\u30ec\u30af\u30bf\u30fc\u3068\u306f\uff08CSS\u306e\u57fa\u790e\u30fbHTML\u306e\u4e88\u5099\u77e5\u8b58\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CSS\u306f\u3001HTML\u3067\u4f5c\u3089\u308c\u305f\u69cb\u9020\u306b\u5bfe\u3057\u3066\u6587\u5b57\u306e\u8272\u3084\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u6307\u5b9a\u306a\u3069\u3001\u898b\u305f\u76ee\u306e\u8abf\u6574\u3092\u884c\u3046\u3082\u306e\u3002\u305d\u306e\u8abf\u6574\u3092\u3069\u3053\u306b\u3059\u308b\u306e\u304b\u3092\u6307\u5b9a\u3059\u308b\u6642\u306b\u4f7f\u3046\u306e\u304c<strong>\u300cCSS\u30bb\u30ec\u30af\u30bf\u30fc\u300d<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-stk-plugin-voicecomment voice default r icon_color_none\"><figure class=\"icon\"><img loading=\"lazy\" decoding=\"async\" class=\"voice_icon__img\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2020\/11\/robot-smile.png\" width=\"100\" height=\"100\"\/><\/figure><div class=\"voicecomment\">\n<p class=\"wp-block-paragraph\">]HTML\u3068CSS\u306f\u305d\u308c\u305e\u308c\u5f79\u5272\u304c\u9055\u3046\u3093\u3060\u306d<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f<span class=\"marker\"><strong>\u300cCSS\u7591\u4f3c\u8981\u7d20\u300d<\/strong><\/span>\u3068\u3044\u3046\u3082\u306e\u3092\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u3082\u3046\u77e5\u3063\u3066\u308b\u3088\u30fc\u300d\u3063\u3066\u65b9\u306f\u3001<a href=\"#pseudo-element\">\u300cCSS\u7591\u4f3c\u8981\u7d20\u3068\u306f\uff1f\u300d\u306e\u9805\u76ee\u3078\u3069\u3046\u305e<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e88\u5099\u77e5\u8b58\uff1a<strong>HTML\u306e\u69cb\u9020<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CSS\u3092\u7406\u89e3\u3059\u308b\u524d\u306b\u307e\u305aHTML\u304c\u3069\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u304b\u77e5\u3063\u3066\u3044\u308b\u3068\u7406\u89e3\u304c\u6df1\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>HTML\u306f\u30bf\u30b0\u3068\u547c\u3070\u308c\u308b\u8a18\u53f7\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/><span class=\"marker\"><strong>\u958b\u59cb\u30bf\u30b0<\/strong>\u3068<strong>\u7d42\u4e86\u30bf\u30b0<\/strong>\u304c\u3042\u308a\u3001\u6587\u7ae0\u306a\u3069\u306e\u60c5\u5831\u3092\u3053\u306e\u30bf\u30b0\u3067\u56f2\u3080\u3053\u3068\u306b\u3088\u308a\u610f\u5473\u3092\u6301\u3061\u307e\u3059\u3002<\/span>\u305d\u3057\u3066\u3001\u3053\u306e<span class=\"marker\">\u958b\u59cb\u30bf\u30b0\u304b\u3089\u7d42\u4e86\u30bf\u30b0\u3067\u56f2\u308f\u308c\u305f\u6240\u3092\u300c<strong>\u8981\u7d20<\/strong>\u300d\u3068\u3044\u3044\u307e\u3059\u3002<\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2020\/11\/elements.png\" alt=\"\u56f3\u89e3\uff1a\u8981\u7d20\u306e\u4ed5\u7d44\u307f\u89e3\u8aac\" class=\"wp-image-5462\"\/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u30bf\u30b0\u306b\u3088\u3063\u3066\u4f7f\u3048\u308b\u3082\u306e\u306b\u9055\u3044\u306f\u3042\u308a\u307e\u3059\u304c\u3001<strong>\u300c\u5c5e\u6027\u300d<\/strong>\u3068\u305d\u306e\u5024\u3067\u3042\u308b\u3001<strong>\u300c\u5c5e\u6027\u5024\u300d<\/strong>\u3092\u6307\u5b9a\u51fa\u6765\u307e\u3059\u3002<br \/>\u5f8c\u3067\u7d39\u4ecb\u3059\u308b\u300cid\u300d\u3084\u300cclass\u300d\u3082\u3001\u300c\u5c5e\u6027\u300d\u3068\u300c\u5c5e\u6027\u5024\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001\u8981\u7d20\u3092\u30bf\u30b0\u3067\u56f2\u3080\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u3002\u300c\u5165\u308c\u5b50\u300d\u3068\u8a00\u3063\u305f\u308a\u3082\u3057\u307e\u3059\u3002<br \/>\u4e0b\u306e\u56f3\u3060\u3068\u3001\u4e09\u3064\u306e\u8981\u7d20\u306f\u968e\u5c64\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\u5916\u5074\u306e\u8981\u7d20\u3092\u300c\u89aa\u8981\u7d20\u300d\u3001\u5185\u5074\u306e\u8981\u7d20\u3092\u300c\u5b50\u8981\u7d20\u300d\u3068\u3044\u3044\u3001\u5b50\u8981\u7d20\u306e\u3055\u3089\u306b\u5185\u5074\u304c\u300c\u5b6b\u8981\u7d20\u300d\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2020\/11\/html-structure.png\" alt=\"\u56f3\u89e3\uff1aHTML\u306e\u8981\u7d20\u5165\u308c\u5b50\u69cb\u9020\" class=\"wp-image-5466\"\/><figcaption class=\"wp-element-caption\">\u30b5\u30f3\u30d7\u30eb\u3067\u306f&lt;div&gt;\u304c\u89aa\u8981\u7d20\u3002\u66f4\u306b\u4e0a\u306b\u3055\u304b\u306e\u307c\u3063\u3066\u884c\u3051\u3070&lt;html&gt;\u304c\u89aa\u8981\u7d20\u306b\u306a\u308a\u307e\u3059\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">CSS\u306e\u57fa\u672c\u6587\u6cd5<\/h2>\n\n\n\n<div class=\"stk_grids\" style=\"--gridgap_pc:16px;--gridgap_sp:16px;--gridcolumn_pc:2;--gridcolumn_sp:1\">\n<div class=\"stk_grid__child\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"295\" height=\"200\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2020\/11\/css-grammar.png\" alt=\"\u56f3\u89e3\uff1acss\u306e\u6587\u6cd5\u66f8\u304d\u65b9\" class=\"wp-image-5685\"\/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"stk_grid__child\">\n<p class=\"has-text-align-left wp-block-paragraph\">CSS\u306f\u3001\u300c\u30bb\u30ec\u30af\u30bf\u30fc\u300d\u300c\u30d7\u30ed\u30d1\u30c6\u30a3\u300d\u300c\u5024\u300d\u306e3\u3064\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\u30bb\u30ec\u30af\u30bf\u30fc\u3067\u6307\u5b9a\u3059\u308b\u4e8b\u306b\u3088\u308a\u3001\u30c7\u30b6\u30a4\u30f3\u306e\u9069\u7528\u5148\u3092\u9078\u629e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"is-style-supplement-memo wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">CSS\u3092\u9069\u7528\u3059\u308b\u4e8b\u3092\u3001\u300cCSS\u3092\u639b\u3051\u308b\u300d\u300cCSS\u304c\u52b9\u304f\u300d\u3068\u8a00\u3063\u305f\u308a\u3057\u307e\u3059\u3002<\/mark><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"pseudo-element\">CSS\u7591\u4f3c\u8981\u7d20\u3068\u306f\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u64ec\u4f3c\u8981\u7d20\u3068\u306f\u9078\u629e\u3055\u308c\u305f\u8981\u7d20\u306e\u7279\u5b9a\u90e8\u5206\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3055\u305b\u308b\u4e8b\u304c\u51fa\u6765\u307e\u3059\u3002<br \/>\u307e\u305f\u3001\u6587\u5b57\u901a\u308a\u3001<span class=\"marker\"><strong>\u7591\u4f3c\u7684\u306b\u8981\u7d20\u3092\u751f\u6210\u3059\u308b<\/strong>\u3053\u3068\u3067\u3001HTML\u30d5\u30a1\u30a4\u30eb\u306b\u5909\u66f4\u3092\u52a0\u3048\u308b\u3053\u3068\u306a\u304f\u30b9\u30bf\u30a4\u30eb\u3092\u5909\u5316\u3055\u305b\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/span><\/p>\n\n\n\n<dl class=\"explain\">\n<dt>CSS\u7591\u4f3c\u30af\u30e9\u30b9\u3068\u306e\u3061\u304c\u3044<\/dt>\n<dd>\u7591\u4f3c\u30af\u30e9\u30b9\u306f\u30bb\u30ec\u30af\u30bf\u306b\u4ed8\u52a0\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u3053\u3068\u3067\u3001\u9078\u629e\u3055\u308c\u305f\u8981\u7d20\u306b\u5bfe\u3057\u3066\u7279\u5b9a\u306e\u72b6\u614b\u306e\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3059\u3002\n<\/dd>\n<\/dl>\n\n\n\n<div class=\"wp-block-stk-plugin-voicecomment voice default l icon_color_none\"><figure class=\"icon\"><img loading=\"lazy\" decoding=\"async\" class=\"voice_icon__img\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2020\/10\/profile.png\" width=\"100\" height=\"100\"\/><figcaption class=\"avatar-name name\">\u30d5\u30a8\u30eb<\/figcaption><\/figure><div class=\"voicecomment\">\n<p class=\"wp-block-paragraph\">\u8868\u793a\u7d50\u679c\u306f\u3001\u5206\u304b\u308a\u6613\u3044\u3088\u3046\u306b\u30bf\u30b0\u3092\u4ed8\u3051\u3066\u8868\u793a\u3057\u3066\u3044\u308b\u3088\u3002<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading stk-mt_m\" id=\"pseudo-element\">CSS\u7591\u4f3c\u8981\u7d20\u306e\u7a2e\u985e<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff0eX::first-letter\uff08\u8981\u7d20\u306e1\u884c\u76ee\u306e\u6700\u521d\u306e\u6587\u5b57\u3092\u6307\u5b9a\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>::first-letter<\/strong>\u306f\u30011\u884c\u76ee\u306e\u6700\u521d\u306e\u6587\u5b57\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>\u25a0 HTML\n&lt;p class=&quot;sample&quot;&gt;\n\u30c6\u30ad\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002&lt;br&gt;\n\u6539\u884c\u3057\u3066\u30821\u884c\u76ee\u306e\u6700\u521d\u306e\u6587\u5b57\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002\n&lt;\/p&gt;\n\u25a0 CSS\n.sample::first-letter {\n  color: #00bce9;\n}<\/code><\/pre><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"250\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2021\/01\/first-letter.png\" alt=\"\u56f3\u89e3\uff1a\u7591\u4f3c\u8981\u7d20first-letter\u306e\u8868\u793a\u7d50\u679c\" class=\"wp-image-8186\" srcset=\"https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/first-letter.png 660w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/first-letter-300x114.png 300w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/first-letter-485x184.png 485w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading stk-mt_m\">2\uff0eX::first-line\uff08\u8981\u7d20\u306e\u6700\u521d\u306e1\u884c\u3092\u6307\u5b9a\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>::first-line<\/strong>\u306f\u3001<span class=\"marker\">\u6700\u521d\u306e1\u884c<\/span>\u306b\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>\u25a0 HTML\n&lt;p class=&quot;sample&quot;&gt;\n\u30c6\u30ad\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002&lt;br&gt;\n\u6539\u884c\u3057\u3066\u3082\u6700\u521d\u306e1\u884c\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002\n&lt;\/p&gt;\n\u25a0 CSS\n.sample::first-line {\n  color: #00bce9;\n}<\/code><\/pre><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2021\/01\/first-line.png\" alt=\"\u56f3\u89e3\uff1a\u7591\u4f3c\u8981\u7d20first-line\u306e\u8868\u793a\u7d50\u679c\" class=\"wp-image-8222\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading stk-mt_m\">3\uff0eX::before\uff08\u8981\u7d20\u306e\u6700\u521d\u306e\u5b50\u8981\u7d20\u3092\u4f5c\u6210\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>::before<\/strong>\u306f\u3001<span class=\"marker\">\u9078\u629e\u3057\u305f\u8981\u7d20\u306e\u6700\u521d\u306e\u5b50\u8981\u7d20<\/span>\u3068\u3057\u3066\u64ec\u4f3c\u8981\u7d20\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002CSS\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u300ccontent\u300d\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"memo\">\nHTML\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u306a\u304f\u8981\u7d20\u306e\u5185\u5bb9\u3092\u5909\u66f4\u3057\u305f\u308a\u8ffd\u52a0\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\n\u30e1\u30cb\u30e5\u30fc\u306e\u524d\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u8868\u793a\u3055\u305b\u308b\u6642\u306b\u3088\u304f\u4f7f\u3044\u307e\u3059\u306d\u3002\n<\/div>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>\u25a0 HTML\n&lt;p class=&quot;sample&quot;&gt;\n::before \u2190\u3000\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u898b\u308b\u3068\u3053\u3053\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002\n\u30c6\u30ad\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002\n&lt;\/p&gt;\n\u25a0 CSS\n.sample::before {\n  color: #00bce9;\n  content: &quot;\u3053\u306e\u69d8\u306b\u8ffd\u52a0\u51fa\u6765\u307e\u3059\u3002&quot;;\n}<\/code><\/pre><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"215\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2021\/01\/before.png\" alt=\"\u56f3\u89e3\uff1a\u7591\u4f3c\u8981\u7d20before\u306e\u8868\u793a\u7d50\u679c\" class=\"wp-image-8215\" srcset=\"https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/before.png 660w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/before-300x98.png 300w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/before-485x158.png 485w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading stk-mt_m\">4\uff0eX::after\uff08\u8981\u7d20\u306e\u6700\u5f8c\u306e\u5b50\u8981\u7d20\u3092\u4f5c\u6210\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>::after<\/strong>\u306f\u3001<span class=\"marker\">\u9078\u629e\u3057\u305f\u8981\u7d20\u306e\u6700\u5f8c\u306e\u5b50\u8981\u7d20<\/span>\u3068\u3057\u3066\u64ec\u4f3c\u8981\u7d20\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002CSS\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u300ccontent\u300d\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"memo\">\nHTML\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u306a\u304f\u8981\u7d20\u306e\u5185\u5bb9\u3092\u5909\u66f4\u3057\u305f\u308a\u8ffd\u52a0\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\n\u5148\u7a0b\u3068\u540c\u3058\u304f\u30e1\u30cb\u30e5\u30fc\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u8868\u793a\u3055\u305b\u308b\u6642\u306b\u3088\u304f\u4f7f\u3044\u307e\u3059\u306d\u3002\u3053\u3061\u3089\u306f\u8981\u7d20\u306e\u5f8c\u308d\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002\n<\/div>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>\u25a0 HTML\n&lt;p class=&quot;sample&quot;&gt;\n\u30c6\u30ad\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002\n::after \u2190\u3000\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u898b\u308b\u3068\u3053\u3053\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002\n&lt;\/p&gt;\n\u25a0 CSS\n.sample::before {\n  color: #00bce9;\n  content: &quot;\u4eca\u5ea6\u306f\u5f8c\u308d\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002&quot;;\n}<\/code><\/pre><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"215\" src=\"https:\/\/fueru.info\/blog\/wp-content\/uploads\/2021\/01\/after.png\" alt=\"\u56f3\u89e3\uff1a\u7591\u4f3c\u8981\u7d20after\u306e\u8868\u793a\u7d50\u679c\" class=\"wp-image-8214\" srcset=\"https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/after.png 660w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/after-300x98.png 300w, https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/after-485x158.png 485w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\" style=\"display:block; text-align:center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-4186887910872435\" data-ad-slot=\"4362651766\" data-full-width-responsive=\"false\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081\uff1a\u7591\u4f3c\u8981\u7d20\u7de8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56de\u306f\u7591\u4f3c\u8981\u7d20\u3092\u7d39\u4ecb\u3044\u305f\u3057\u307e\u3057\u305f\u3002\u7591\u4f3c\u8981\u7d20\u306e\u306a\u304b\u3067\u3082\u300c::before\u300d\u300c::after\u300d\u306f\u69d8\u3005\u306a\u8868\u73fe\u304c\u53ef\u80fd\u306b\u306a\u308b\u306e\u3067\u5fc5\u9808\u3060\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed6\u306b\u3082\u30bb\u30ec\u30af\u30bf\u30fc\u306f\u3042\u308b\u306e\u3067\u3053\u308c\u3089\u306e\u8a18\u4e8b\u3068\u5408\u308f\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u306d\u3002\u8868\u73fe\u306e\u5e45\u304c\u5e83\u304c\u308a\u307e\u3059\u3088\u3002<\/p>\n\n\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u308c\u304b\u3089CSS\u3092\u52c9\u5f37\u3057\u3066\u307f\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u308b\u65b9\u5411\u3051\u306b\u3001\u8d85\u7c21\u5358\u306b\u565b\u307f\u7815\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002\u3069\u3093\u306a\u611f\u3058\u306a\u306e\u304b\u306a\u3041\uff5e\u3001\u304f\u3089\u3044\u306e\u8208\u5473\u3067\u30aa\u30c3\u30b1\u30fc\u3002 \u4eca\u56de\u306f\u300cCSS\u306e\u7591\u4f3c\u8981\u7d20\u306b\u3064\u3044\u3066\u300d\u66f8\u3044\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306e\u7591\u4f3c\u8981\u7d20\u3092\u7406\u89e3\u3057\u3001\u4f7f\u3044\u3053\u306a\u305b\u308b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8240,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_jinr_url_youtube":"","_jinr_pip_youtube":false,"_jinr_time_youtube":"","_jinr_thumb_youtube":"","_jinr_media_youtube":"","_jinr_category_edit":false,"_jinr_category":"","_jinr_title_display":false,"_jinr_snsbutton_display":false,"_jinr_ads_display":false,"_jinr_thumbnail_display":false,"_jinr_profile_display":false,"_jinr_representations_display":false,"_jinr_relatedpost_display":false,"_jinr_sidebar1col_display":false,"_jinr_sidebar2col_display":false,"_jinr_seotitle_display":"","_jinr_description_display":"","_jinr_keyword_display":"","_jinr_hastag_display":"","_jinr_canonical_display":"","_jinr_noindex_display":false,"_jinr_paidpost":false,"_jinr_paidpost_product_id":"","_jinr_headtag_article":"","footnotes":""},"categories":[8,7],"tags":[],"class_list":["post-8151","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-html-css","category-design"],"yoast_head":"<!-- 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max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010\u521d\u5fc3\u8005OK\u3011CSS\u7591\u4f3c\u8981\u7d20\u306e\u7a2e\u985e\u3068\u66f8\u304d\u65b9 \u8d85\u7c21\u5358\u306b\u89e3\u8aac\" \/>\n<meta property=\"og:description\" content=\"\u3053\u308c\u304b\u3089CSS\u3092\u52c9\u5f37\u3057\u3066\u307f\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u308b\u65b9\u5411\u3051\u306b\u3001\u8d85\u7c21\u5358\u306b\u565b\u307f\u7815\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002CSS\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u3001\u6b21\u306b\u7591\u4f3c\u30af\u30e9\u30b9\u3092\u899a\u3048\u305f\u3089\u3001\u3044\u3088\u3044\u3088\u7591\u4f3c\u8981\u7d20\u3067\u3059\u3002\u7591\u4f3c\u8981\u7d20\u306f\u5229\u7528\u983b\u5ea6\u304c\u9ad8\u3044\u306e\u3067\u78ba\u5b9f\u306b\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fueru.info\/design\/html-css\/css-pseudo-elements-beginner\/\" \/>\n<meta property=\"og:site_name\" content=\"FUERU\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-01T04:32:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/affiblog2019.xsrv.jp\/wp\/wp-content\/uploads\/2021\/01\/css-pseudo-elements-beginner-8151.png\" \/>\n\t<meta property=\"og:image:width\" content=\"740\" \/>\n\t<meta property=\"og:image:height\" content=\"416\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"hiroyon\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"\u3010\u521d\u5fc3\u8005OK\u3011CSS\u7591\u4f3c\u8981\u7d20\u306e\u7a2e\u985e\u3068\u66f8\u304d\u65b9 \u8d85\u7c21\u5358\u306b\u89e3\u8aac\" \/>\n<meta name=\"twitter:description\" 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