{"id":1608,"date":"2025-11-08T12:00:00","date_gmt":"2025-11-08T03:00:00","guid":{"rendered":"https:\/\/ownmono.com\/blog\/?p=1608"},"modified":"2025-12-11T21:04:10","modified_gmt":"2025-12-11T12:04:10","slug":"css-pseudo-element-image","status":"publish","type":"post","link":"https:\/\/ownmono.com\/blog\/frontend\/css-pseudo-element-image\/","title":{"rendered":"CSS\u64ec\u4f3c\u8981\u7d20\u306econtent\u3067\u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\uff01"},"content":{"rendered":"<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2024\/03\/hashibi_right-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30cf\u30b7\u30d3\u30a3\u304f\u3093<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p>\u753b\u50cf\u7d20\u6750\u3092\u4f7f\u3063\u3066Web\u30b5\u30a4\u30c8\u3092\u88c5\u98fe\u3057\u305f\u3044\u3063\u3059\uff01\u80cc\u666f\u753b\u50cf\u3067\u306f\u306a\u304f\u3001\u753b\u50cf\u3092\u81ea\u7531\u306b\u52d5\u304b\u3057\u3066\u4f7f\u3044\u305f\u3044\u3063\u3059\u3002<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"yellow\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2024\/03\/capy_left-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30ab\u30d4\u30fc\u3055\u3093<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p>\u80cc\u666f\u753b\u50cf\u3068\u306f\u9055\u3046\u3093\u3060\u306a\u3002\u305d\u308c\u306a\u3089\u64ec\u4f3c\u8981\u7d20\u3092\u4f7f\u3063\u3066\u307f\u308b\u306e\u304c\u30d9\u30b9\u30c8\u3060\u306a\u3002\u6d3b\u7528\u3059\u308b\u983b\u5ea6\u3082\u9ad8\u3044\u304b\u3089\u305c\u3072\u899a\u3048\u3066\u304a\u304f\u3068\u3044\u3044\u305e\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u30c6\u30ad\u30b9\u30c8\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u4ed8\u3051\u305f\u3044\uff0f\u30ea\u30b9\u30c8\u9805\u76ee\u306e\u5148\u982d\u306b\u753b\u50cf\u3092\u5165\u308c\u305f\u3044\u2026\u3068\u3044\u3063\u305f\u5834\u9762\u3067\u3001HTML \u306b <code>&lt;img&gt;<\/code> \u3092\u90fd\u5ea6\u66f8\u304d\u8fbc\u3080\u306e\u306f\u624b\u9593\u3067\u3059\u3002<br>\u305d\u3053\u3067\u3001CSS \u306e\u64ec\u4f3c\u8981\u7d20 <code>::before<\/code> \u3084 <code>::after<\/code> \u3092\u4f7f\u3063\u3066\u3001 <strong>CSS \u5074\u3060\u3051\u3067\u753b\u50cf\u3092\u633f\u5165\u3059\u308b\u65b9\u6cd5<\/strong> \u304c\u4fbf\u5229\u3067\u3059\u3002<br>\u4eca\u56de\u306f\u3001\u4ee5\u4e0b\u306e\u6d41\u308c\u3067\u89e3\u8aac\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list is-style-num_circle\">\n<li>\u64ec\u4f3c\u8981\u7d20\u306e <code>content<\/code> \u306b\u753b\u50cf\u3092\u6307\u5b9a\u3059\u308b\u57fa\u672c\u624b\u6cd5<\/li>\n\n\n\n<li>\u305d\u306e\u753b\u50cf\u30b5\u30a4\u30ba\u30fb\u4f4d\u7f6e\u3092\u8abf\u6574\u3059\u308b\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li><code>background<\/code> \u3092\u4f7f\u3063\u305f\u5225\u30a2\u30d7\u30ed\u30fc\u30c1<\/li>\n\n\n\n<li>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u306e\u30dd\u30a4\u30f3\u30c8<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u64ec\u4f3c\u8981\u7d20\u306e <code>content<\/code> \u3067\u753b\u50cf\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u64ec\u4f3c\u8981\u7d20 <code>::before<\/code>\u30fb<code>::after<\/code> \u306f\u3001\u901a\u5e38\u300c\u524d\uff0f\u5f8c\u308d\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u5165\u308c\u308b\u300d\u300c\u30dc\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u300d\u306a\u3069\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<br>\u3057\u304b\u3057\u5b9f\u306f\u3001<code>content: url(\u2026)<\/code> \u3092\u4f7f\u3063\u3066 <strong>\u753b\u50cf\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"321\" src=\"https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01-1024x321.webp\" alt=\"\" class=\"wp-image-1610\" srcset=\"https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01-1024x321.webp 1024w, https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01-300x94.webp 300w, https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01-768x241.webp 768w, https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01-1536x481.webp 1536w, https:\/\/ownmono.com\/blog\/wp-content\/uploads\/2025\/11\/element01.webp 1893w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">\u64ec\u4f3c\u8981\u7d20\u306e\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8<\/figcaption><\/figure>\n\n\n\n<p>\u3053\u3061\u3089\u306e\u753b\u50cf\u306f\u64ec\u4f3c\u8981\u7d20\u3092\u4f7f\u3063\u3066\u3001\u30da\u30fc\u30b8\u306e\u53f3\u4e0a\u306b\u88c5\u98fe\u76ee\u7684\u306e\u753b\u50cf\u3092\u5dee\u3057\u8fbc\u3093\u3060\u5f62\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u901a\u5e38\u3067\u3042\u308c\u3070\u3001\u30ab\u30e9\u30e0\u306a\u3069\u3092\u4f7f\u3063\u3066\u8981\u7d20\u306e\u5272\u5408\u3092\u99c6\u4f7f\u3057\u3066\u8868\u73fe\u3057\u3088\u3046\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30ab\u30e9\u30e0\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306f\u753b\u9762\u5272\u5408\u306e\u5e45\u306b\u5de6\u53f3\u3055\u308c\u3066\u3057\u307e\u3046\u306e\u3067\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u304c\u3057\u306b\u304f\u3044\u5834\u9762\u304c\u3042\u308b\u306e\u3067\u3001\u305d\u308c\u3089\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p::before {\n  content: url(.\/heart.png);\n  vertical-align: middle;\n  padding-right: 5px;\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u3059\u3079\u3066\u306e <code>&lt;p&gt;<\/code> \u8981\u7d20\u306e\u524d\u306b <code>heart.png<\/code> \u30a2\u30a4\u30b3\u30f3\u3092\u633f\u5165\u3057\u3066\u3044\u307e\u3059\u3002\u6587\u7ae0\u3068\u306e\u5782\u76f4\u4f4d\u7f6e\u3084\u4f59\u767d\uff08<code>vertical-align<\/code>\/<code>padding-right<\/code>\uff09\u3082\u8abf\u6574\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><code>content<\/code> \u3067\u6307\u5b9a\u3057\u305f\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3059\u308b\u306b\u306f\uff1f<\/h2>\n\n\n\n<p>\u4e0a\u8a18\u306e\u65b9\u6cd5\u3067\u753b\u50cf\u3092\u633f\u5165\u3067\u304d\u3066\u3082\u3001\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3059\u304e\u305f\u308a\u5c0f\u3055\u3059\u304e\u305f\u308a\u3068\u3044\u3046\u554f\u984c\u304c\u51fa\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br>\u3057\u304b\u3057\u3001<code>content<\/code> \u3067\u633f\u5165\u3055\u308c\u305f\u753b\u50cf\u306b\u5bfe\u3057\u3066 <code>width<\/code>\/<code>height<\/code> \u3092\u6307\u5b9a\u3057\u3066\u3082\u3001\u671f\u5f85\u3069\u304a\u308a\u306b\u52b9\u304b\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6c7a\u7b56\uff1a<code>transform: scale()<\/code> \u3092\u4f7f\u3046<\/h3>\n\n\n\n<p>\u753b\u50cf\u306e\u5927\u304d\u3055\u3092\u8abf\u6574\u3057\u305f\u3044\u3068\u304d\u306f\u3001\u64ec\u4f3c\u8981\u7d20\u306b <code>display: inline-block<\/code> \u7b49\u3092\u6307\u5b9a\u3057\u3066\u3001<code>transform: scale()<\/code> \u3067\u7e2e\u5c0f\u30fb\u62e1\u5927\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p::before {\n  content: url(.\/heart.png);\n  display: inline-block;\n  vertical-align: middle;\n  transform: scale(0.1);\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f4d\u7f6e\u30fb\u4f59\u767d\u306e\u8abf\u6574<\/h3>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u753b\u50cf\u81ea\u4f53\u304c\u7e2e\u5c0f\u3055\u308c\u3066\u3082 \u201c\u5143\u306e\u9818\u57df\u201d \u304c\u6b8b\u3063\u3066\u4f59\u767d\u304c\u3067\u304d\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br>\u305d\u306e\u305f\u3081\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066 <code>position: absolute<\/code> \u3092\u4f7f\u3063\u3066\u4f4d\u7f6e\u3092\u305a\u3089\u3057\u305f\u308a\u3001\u89aa\u8981\u7d20\u306b <code>position: relative<\/code> \u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p {\n  position: relative;\n  padding-left: 50px;\n}\np::before {\n  content: url(.\/heart.png);\n  transform: scale(0.1);\n  position: absolute;\n  top: -105px;\n  left: -100px;\n}<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><code>background<\/code> \u3092\u4f7f\u3063\u305f\u753b\u50cf\u8868\u793a\u306e\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u300c\u753b\u50cf\u30b5\u30a4\u30ba\u3092\u81ea\u7531\u306b\u8abf\u6574\u3057\u305f\u3044\u300d\u300c\u30dc\u30c3\u30af\u30b9\u306e\u4e2d\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u5165\u308c\u3066\u914d\u7f6e\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u5834\u5408\u306f\u3001\u64ec\u4f3c\u8981\u7d20\u3092 \u2018\u7a7a\u306e\u30dc\u30c3\u30af\u30b9\u2019 \u3068\u3057\u3066\u4f7f\u3044\u3001\u80cc\u666f\u753b\u50cf\u3068\u3057\u3066\u8a2d\u5b9a\u3059\u308b\u65b9\u304c\u30b7\u30f3\u30d7\u30eb\u3067\u5805\u5b9f\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p::before {\n  content: &quot;&quot;;\n  display: inline-block;\n  width: 25px;\n  height: 25px;\n  background: url(.\/heart.png) no-repeat;\n  background-size: contain;\n  margin-right: 8px;\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<code>content: \"\"<\/code> \u3067\u5b9f\u8cea\u30dc\u30c3\u30af\u30b9\u3060\u3051\u3092\u751f\u6210\u3057\u3001<code>background<\/code> \u306b\u753b\u50cf\u3092\u6307\u5b9a\u3002<code>width<\/code>\uff0f<code>height<\/code> \u3067\u30b5\u30a4\u30ba\u3092\u5236\u5fa1\u3067\u304d\u308b\u305f\u3081\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5b89\u5b9a\u3057\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3044\u3064\u4f7f\u3046\u3079\u304d\u304b\uff1f<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u306b\u30c6\u30ad\u30b9\u30c8\u6a2a\u306b\u5c0f\u3055\u306a\u30a2\u30a4\u30b3\u30f3\u3092\u4ed8\u3051\u308b\u3060\u3051\u306a\u3089\u3001<code>content: url()<\/code> \u306e\u624b\u8efd\u306a\u65b9\u6cd5\u3067\u3082\u5341\u5206\u3002<\/li>\n\n\n\n<li>\u305f\u3060\u3057\u3001 <strong>\u8907\u96d1\u306a\u30ec\u30a4\u30a2\u30a6\u30c8<\/strong> \u3084 <strong>\u753b\u50cf\u30b5\u30a4\u30ba\uff0f\u4f4d\u7f6e\u8abf\u6574\u304c\u591a\u304f\u5fc5\u8981\u306a\u5834\u9762<\/strong> \u3067\u306f\u3001<code>background<\/code> \u30d1\u30bf\u30fc\u30f3\u306e\u65b9\u304c\u7ba1\u7406\u3057\u3084\u3059\u3044\u3068\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7591\u4f3c\u8981\u7d20\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>after\u3084before\u304c\u3082\u306e\u3059\u3054\u304f\u4fbf\u5229\u306a\u306e\u306f\u300cHTML\u30b3\u30fc\u30c9\u3092\u6c5a\u3059\u3053\u3068\u306a\u304f\u69d8\u3005\u306a\u8868\u73fe\u304c\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u306a\u304a\u3001\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u306fCSS\u3067\u3042\u308b\u7591\u4f3c\u8981\u7d20\u3092\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4e2d\u8eab\u3068\u3057\u3066\u898b\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001SEO\u3092\u6c17\u306b\u305b\u305a\u306b\u30e6\u30fc\u30b6\u30fc\u306e\u305f\u3081\u306e\u81ea\u7531\u306a\u8868\u73fe\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u88c5\u98fe\u306e\u8ffd\u52a0\u30fb\u524a\u9664\u304cCSS\u3060\u3051\u3067\u5b8c\u7d50\u3059\u308b\u306e\u3082\u5f37\u307f\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u300c\u898b\u51fa\u3057\u306e\u524d\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u4ed8\u3051\u305f\u3044\u300d\u300c\u30ea\u30f3\u30af\u306b\u77e2\u5370\u3092\u8db3\u3057\u305f\u3044\u300d\u306a\u3069\u3001HTML\u3092\u89e6\u3089\u305a\u306b\u6e08\u3080\u3002\u2192 \u30c7\u30b6\u30a4\u30f3\u5909\u66f4\u6642\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u306a\u3069\u306b\u8aad\u307f\u4e0a\u3052\u3089\u308c\u306a\u3044\uff08\u975e\u8868\u793a\uff09\u306e\u3082\u88c5\u98fe\u76ee\u7684\u306a\u3089\u9b45\u529b\u3067\u3059\u3002<br><code>content<\/code> \u3067\u8ffd\u52a0\u3055\u308c\u305f\u6587\u5b57\u3084\u753b\u50cf\u306f\u3001\u901a\u5e38\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u30c4\u30fc\u30eb\u306b\u306f\u8a8d\u8b58\u3055\u308c\u307e\u305b\u3093\u3002<br>\u2192 \u88c5\u98fe\u76ee\u7684\u306a\u3089\u305d\u308c\u3067OK\u3067\u3059\u304c\u3001\u610f\u5473\u306e\u3042\u308b\u60c5\u5831\uff08\u672c\u6587\u306e\u4e00\u90e8\uff09\u3092\u64ec\u4f3c\u8981\u7d20\u3067\u51fa\u3059\u306e\u306fNG\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\uff08\u753b\u9762\u5e45\u306b\u5fdc\u3058\u3066\u8abf\u6574\uff09<\/h2>\n\n\n\n<p>\u30b9\u30de\u30db\u30fb\u30bf\u30d6\u30ec\u30c3\u30c8\u30fbPC\u3068\u3044\u3063\u305f\u8907\u6570\u753b\u9762\u3067\u95b2\u89a7\u3055\u308c\u308b\u4eca\u3001\u64ec\u4f3c\u8981\u7d20\u3067\u8868\u793a\u3057\u305f\u753b\u50cf\u3082\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u306b\u5bfe\u5fdc\u3055\u305b\u308b\u306e\u304c\u671b\u307e\u3057\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p {\n  font-size: 16px;\n}\np::before {\n  content: &quot;&quot;;\n  display: inline-block;\n  width: 12px;\n  height: 12px;\n  background: url(.\/heart.png) no-repeat;\n  background-size: contain;\n  margin-right: 3px;\n}\n@media screen and (min-width: 480px) {\n  p {\n    font-size: 28px;\n  }\n  p::before {\n    width: 20px;\n    height: 20px;\n    margin-right: 8px;\n  }\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u3001\u753b\u9762\u5e45\u304c 480px \u4ee5\u4e0a\uff08\u30bf\u30d6\u30ec\u30c3\u30c8\/PC\uff09\u3067\u306f\u30a2\u30a4\u30b3\u30f3\u30b5\u30a4\u30ba\u3084\u4f59\u767d\u3092\u5927\u304d\u304f\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001\u30a2\u30a4\u30b3\u30f3\u30b5\u30a4\u30ba\u3092\u300c\u6587\u5b57\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u5909\u5316\u3055\u305b\u305f\u3044\u300d\u306a\u3089 <code>px<\/code> \u3067\u306f\u306a\u304f <code>em<\/code> \u5358\u4f4d\u3092\u4f7f\u3046\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>p { font-size: 16px; }\np::before {\n  content: &quot;&quot;;\n  display: inline-block;\n  width: 0.7em;\n  height: 0.7em;\n  background: url(.\/heart.png) no-repeat;\n  background-size: contain;\n  margin-right: 0.2em;\n}\n@media screen and (min-width: 480px) {\n  p { font-size: 28px; }\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u5834\u5408\u3001\u753b\u9762\u5e45\u304c\u5909\u308f\u308b\u3068\u6587\u5b57\u30b5\u30a4\u30ba\u304c\u5909\u308f\u308a\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u30a2\u30a4\u30b3\u30f3\u30b5\u30a4\u30ba\u3082\u6bd4\u4f8b\u3057\u3066\u5909\u308f\u308b\u8a2d\u8a08\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081\uff1a<\/h2>\n\n\n\n<p>\u64ec\u4f3c\u8981\u7d20\u3092\u4f7f\u3048\u3070\u3001HTML\u3092\u6c5a\u3055\u305a\u306b\u30c7\u30b6\u30a4\u30f3\u306e\u5e45\u3092\u5e83\u3052\u3089\u308c\u307e\u3059\u3002<br>\u753b\u50cf\u3084\u30a2\u30a4\u30b3\u30f3\u3092CSS\u3067\u81ea\u5728\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3001\u8868\u73fe\u529b\u304c\u4e00\u6c17\u306b\u4e0a\u304c\u308a\u307e\u3059\u3002<br>\u5c0f\u3055\u306a\u88c5\u98fe\u304b\u3089UI\u6f14\u51fa\u307e\u3067\u3001\u65e5\u3005\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u305c\u3072\u6d3b\u304b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span><\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u64ec\u4f3c\u8981\u7d20 <code>::before<\/code>\uff0f<code>::after<\/code> \u3092\u4f7f\u3048\u3070\u3001HTML \u3092\u76f4\u63a5\u3044\u3058\u3089\u305a\u306b\u30a2\u30a4\u30b3\u30f3\u3084\u753b\u50cf\u3092\u633f\u5165\u3067\u304d\u308b\u3002<\/li>\n\n\n\n<li><code>content: url()<\/code> \u3067\u3082\u753b\u50cf\u633f\u5165\u53ef\u80fd\u3060\u304c\u3001\u30b5\u30a4\u30ba\u8abf\u6574\u306f <code>transform: scale()<\/code> \u7b49\u306e\u5de5\u592b\u304c\u5fc5\u8981\u3002<\/li>\n\n\n\n<li>\u3088\u308a\u30b5\u30a4\u30ba\u30fb\u4f4d\u7f6e\u3092\u81ea\u5728\u306b\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u306a\u3089\u3001\u64ec\u4f3c\u8981\u7d20\u3092\u300c\u7a7a\u7bb1\u300d\u306b\u3057\u3066 <code>background<\/code> \u306b\u753b\u50cf\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u304c\u5b89\u5b9a\u3002<\/li>\n\n\n\n<li>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u3067\u306f\u3001\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3084 <code>em<\/code> \u5358\u4f4d\u3092\u4f7f\u3063\u3066\u3001\u753b\u9762\u5e45\u3084\u6587\u5b57\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u305f\u8abf\u6574\u3092\u884c\u304a\u3046\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u30c6\u30ad\u30b9\u30c8\u306b\u30a2\u30a4\u30b3\u30f3\u3092\u4ed8\u3051\u305f\u3044\uff0f\u30ea\u30b9\u30c8\u9805\u76ee\u306e\u5148\u982d\u306b\u753b\u50cf\u3092\u5165\u308c\u305f\u3044\u2026\u3068\u3044\u3063\u305f\u5834\u9762\u3067\u3001HTML \u306b &lt;img&gt; \u3092\u90fd\u5ea6\u66f8\u304d\u8fbc\u3080\u306e\u306f\u624b\u9593\u3067\u3059\u3002\u305d\u3053\u3067\u3001CSS \u306e\u64ec\u4f3c\u8981\u7d20 ::before \u3084 ::after \u3092\u4f7f\u3063\u3066 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1624,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[19],"tags":[14],"class_list":["post-1608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-frontend","tag-css"],"_links":{"self":[{"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/posts\/1608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/comments?post=1608"}],"version-history":[{"count":2,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/posts\/1608\/revisions"}],"predecessor-version":[{"id":1611,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/posts\/1608\/revisions\/1611"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/media\/1624"}],"wp:attachment":[{"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/media?parent=1608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/categories?post=1608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ownmono.com\/blog\/wp-json\/wp\/v2\/tags?post=1608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}