{"id":18118,"date":"2026-07-14T16:29:21","date_gmt":"2026-07-14T16:29:21","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=18118"},"modified":"2026-09-20T16:50:48","modified_gmt":"2026-09-20T16:50:48","slug":"css-transition","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css-transition\/","title":{"rendered":"\u30102026\u5e74\u7248\u3011CSS transition\u306e\u4f7f\u3044\u65b9\uff5chover\u306e\u52d5\u304d\u3092\u306a\u3081\u3089\u304b\u306b\u3059\u308b\u30b3\u30d4\u30da\u30b3\u30fc\u30c9\u96c6"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Web\u30b5\u30a4\u30c8\u306e\u30dc\u30bf\u30f3\u3084\u30e1\u30cb\u30e5\u30fc\u3092\u30db\u30d0\u30fc\u3057\u305f\u3068\u304d\u3001\u8272\u304c\u30d1\u30c3\u3068\u77ac\u9593\u7684\u306b\u5207\u308a\u66ff\u308f\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u306a\u3081\u3089\u304b\u306b\u5909\u5316\u3059\u308b\u30b5\u30a4\u30c8\u3092\u898b\u305f\u3053\u3068\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u3042\u306e\u300c\u3075\u308f\u3063\u3068\u52d5\u304f\u300d\u611f\u899a\u3092\u5b9f\u73fe\u3057\u3066\u3044\u308b\u306e\u304c\u3001CSS\u306e <code>transition<\/code> \u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\"><code>transition<\/code> \u306fJavaScript\u3092\u4e00\u5207\u4f7f\u308f\u305a\u3001CSS\u3060\u3051\u3067\u8981\u7d20\u306e\u5909\u5316\u3092\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u5316\u3067\u304d\u308b\u975e\u5e38\u306b\u5f37\u529b\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u30022026\u5e74\u73fe\u5728\u3001\u30e2\u30d0\u30a4\u30eb\u30d5\u30a1\u30fc\u30b9\u30c8\u306eWeb\u5236\u4f5c\u306b\u304a\u3044\u3066transition\u306f\u3082\u306f\u3084\u5fc5\u9808\u77e5\u8b58\u3067\u3042\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u5927\u304d\u304f\u5de6\u53f3\u3059\u308b\u8981\u7d20\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<code>transition<\/code> \u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u304b\u3089\u3001\u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8\u30fb\u30dc\u30bf\u30f3\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30fb\u30ab\u30fc\u30c9\u306e\u3075\u308f\u3063\u3068\u6d6e\u304f\u6f14\u51fa\u306a\u3069\u5b9f\u7528\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u307e\u3067\u3001\u30b3\u30d4\u30da\u3067\u3059\u3050\u52d5\u304f\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3059\u3002\u300c\u306a\u3093\u3068\u306a\u304f\u52d5\u3044\u3066\u3044\u308b\u3051\u3069\u4ed5\u7d44\u307f\u304c\u308f\u304b\u3063\u3066\u3044\u306a\u3044\u300d\u3068\u3044\u3046\u65b9\u304b\u3089\u3001\u300ctiming-function\u3092\u4f7f\u3044\u3053\u306a\u3057\u305f\u3044\u300d\u4e0a\u7d1a\u8005\u307e\u3067\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u5148\u306b\u3001\u3053\u306e\u8a18\u4e8b\u306e\u7d50\u8ad6\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<ul class=\"wp-block-list\">\n<li><code>transition<\/code> \u306f <code>property \/ duration \/ timing-function \/ delay<\/code> \u306e4\u5024\u3067\u69cb\u6210\u3055\u308c\u3001\u5909\u5316\u524d\u5f8c\u306b\u5024\u304c\u5fc5\u8981<\/li>\n<li><code>:hover<\/code> \u306a\u3069\u306e\u72b6\u614b\u5909\u5316\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8272\u30fb\u5927\u304d\u3055\u30fb\u4f4d\u7f6e\u306a\u3069\u3092\u306a\u3081\u3089\u304b\u306b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u304d\u308b<\/li>\n<li><code>transition: all<\/code> \u306f\u624b\u8efd\u3060\u304c\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\uff08\u500b\u5225\u6307\u5b9a\u304c\u63a8\u5968\uff09<\/li>\n<li><code>timing-function<\/code> \u306e\u4f7f\u3044\u5206\u3051\u3068\u30dc\u30bf\u30f3\u30fb\u30ab\u30fc\u30c9\u306e\u5b9f\u7528\u30d1\u30fc\u30c4\u30b3\u30fc\u30c9\u3092\u8a18\u4e8b\u5185\u3067\u30b3\u30d4\u30da\u63d0\u4f9b<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">CSS transition\u3068\u306f\uff1f\u57fa\u672c\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"CSS transition\u3068\u306f\uff1f\u57fa\u672c\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-01-v2-1.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>transition<\/code> \u306f\u3001CSS\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u304c\u5909\u5316\u3059\u308b\u3068\u304d\u306b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4ed8\u4e0e\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u901a\u5e38\u6642\u306f\u80cc\u666f\u8272\u304c\u767d\u3044\u30dc\u30bf\u30f3\u304c\u3001\u30db\u30d0\u30fc\u6642\u306b\u9752\u304f\u306a\u308b\u5834\u5408\u3001<code>transition<\/code> \u304c\u306a\u3051\u308c\u3070\u77ac\u9593\u7684\u306b\u30d1\u30c3\u3068\u5207\u308a\u66ff\u308f\u308a\u307e\u3059\u3002<code>transition<\/code> \u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u305d\u306e\u5909\u5316\u304c\u6307\u5b9a\u3057\u305f\u6642\u9593\u3092\u304b\u3051\u3066\u306a\u3081\u3089\u304b\u306b\u9032\u884c\u3057\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u91cd\u8981\u306a\u306e\u306f\u3001<strong>transition\u306fCSS\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u304c\u5909\u308f\u308b\u300c\u524d\u306e\u72b6\u614b\u300d\u3068\u300c\u5f8c\u306e\u72b6\u614b\u300d\u306e\u4e21\u65b9\u304c\u5fc5\u8981<\/strong>\u3060\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u3053\u306e\u30dd\u30a4\u30f3\u30c8\u304c\u3001\u3042\u3068\u3067\u7d39\u4ecb\u3059\u308b\u300c\u52b9\u304b\u306a\u3044\u539f\u56e0\u300d\u306e\u7b46\u982d\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">transition\u306e\u57fa\u672c\u69cb\u6587\uff5c4\u3064\u306e\u5024\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18118-1\"><img decoding=\"async\" width=\"1671\" height=\"941\" alt=\"transition\u3092\u69cb\u6210\u3059\u308b4\u3064\u306e\u5024\" class=\"wp-image-20858\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-01.jpg\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-01.jpg 1671w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-01-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-01-1536x865.jpg 1536w\" sizes=\"(max-width: 1671px) 100vw, 1671px\" \/><\/figure>\n<p class=\"wp-block-paragraph\"><code>transition<\/code> \u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u6b21\u306e4\u3064\u306e\u5024\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u66f8\u5f0f *\/\ntransition: property duration timing-function delay;\n\n\/* \u4f8b *\/\ntransition: background-color 0.3s ease 0s;<\/code><\/pre><\/div>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5024<\/th><th>\u5f79\u5272<\/th><th>\u7701\u7565\u6642\u306e\u30c7\u30d5\u30a9\u30eb\u30c8<\/th><\/tr><\/thead><tbody><tr><td><code>property<\/code><\/td><td>\u5909\u5316\u3055\u305b\u308bCSS\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\uff08all \u3067\u5168\u3066\uff09<\/td><td><code>all<\/code><\/td><\/tr><tr><td><code>duration<\/code><\/td><td>\u5909\u5316\u306b\u304b\u304b\u308b\u6642\u9593\uff08\u79d2\/\u30df\u30ea\u79d2\uff09<\/td><td><code>0s<\/code><\/td><\/tr><tr><td><code>timing-function<\/code><\/td><td>\u5909\u5316\u306e\u901f\u5ea6\u30ab\u30fc\u30d6<\/td><td><code>ease<\/code><\/td><\/tr><tr><td><code>delay<\/code><\/td><td>\u5909\u5316\u304c\u59cb\u307e\u308b\u307e\u3067\u306e\u5f85\u6a5f\u6642\u9593<\/td><td><code>0s<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">\u5404\u30b5\u30d6\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u500b\u5225\u306b\u66f8\u304f\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u500b\u5225\u30b5\u30d6\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u66f8\u304f\u65b9\u6cd5 *\/\n.button {\n  transition-property: background-color;\n  transition-duration: 0.3s;\n  transition-timing-function: ease;\n  transition-delay: 0s;\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">hover\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u57fa\u672c\u5b9f\u88c5\uff5c\u8272\u30fb\u80cc\u666f\u8272\u3092\u306a\u3081\u3089\u304b\u306b\u5909\u3048\u308b<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"hover\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u57fa\u672c\u5b9f\u88c5\uff5c\u8272\u30fb\u80cc\u666f\u8272\u3092\u306a\u3081\u3089\u304b\u306b\u5909\u3048\u308b\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-03-v2-1.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">\u6700\u3082\u3088\u304f\u4f7f\u308f\u308c\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u3001<code>:hover<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u8272\u5909\u5316\u3067\u3059\u3002<code>transition<\/code> \u306f\u5909\u5316\u306e\u8d77\u70b9\u3068\u306a\u308b\u8981\u7d20\uff08\u901a\u5e38\u72b6\u614b\uff09\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u80cc\u666f\u8272\u306e\u306a\u3081\u3089\u304b\u5909\u5316\uff08\u5b8c\u5168\u30b3\u30fc\u30c9\uff09<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;button class=\"btn-color\"&gt;\u30db\u30d0\u30fc\u3057\u3066\u306d&lt;\/button&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.btn-color {\n  background-color: #d16176;\n  color: #fff;\n  border: none;\n  padding: 12px 32px;\n  font-size: 16px;\n  border-radius: 4px;\n  cursor: pointer;\n  \/* transition\u306f\u901a\u5e38\u72b6\u614b\u306b\u8a18\u8ff0 *\/\n  transition: background-color 0.3s ease;\n}\n\n.btn-color:hover {\n  background-color: #51322b;\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30b3\u30fc\u30c9\u3092\u30d6\u30e9\u30a6\u30b6\u3067\u958b\u304d\u3001\u30dc\u30bf\u30f3\u3092\u30db\u30d0\u30fc\u3059\u308b\u30680.3\u79d2\u304b\u3051\u3066\u30d4\u30f3\u30af\u304b\u3089\u30c0\u30fc\u30af\u30d6\u30e9\u30a6\u30f3\u3078\u3068\u80cc\u666f\u8272\u304c\u306a\u3081\u3089\u304b\u306b\u5909\u5316\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u6587\u5b57\u8272\u306e\u306a\u3081\u3089\u304b\u5909\u5316<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.link-animated {\n  color: #d16176;\n  text-decoration: none;\n  transition: color 0.2s ease;\n}\n\n.link-animated:hover {\n  color: #51322b;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">\u5927\u304d\u3055\uff08scale\uff09\u3092\u306a\u3081\u3089\u304b\u306b\u5909\u3048\u308b<\/h3>\n<p class=\"wp-block-paragraph\"><code>transform: scale()<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u8981\u7d20\u3092\u306a\u3081\u3089\u304b\u306b\u62e1\u5927\u7e2e\u5c0f\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;img class=\"img-zoom\" src=\"sample.jpg\" alt=\"\u30b5\u30f3\u30d7\u30eb\u753b\u50cf\" width=\"300\" height=\"200\"&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.img-zoom {\n  display: block;\n  transition: transform 0.3s ease;\n}\n\n.img-zoom:hover {\n  transform: scale(1.05);\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\"><code>transform<\/code> \u3092\u4f7f\u3046\u5834\u5408\u3001GPU\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u9069\u7528\u3055\u308c\u308b\u305f\u3081\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u9ad8\u304f\u3001\u5b9f\u52d9\u3067\u63a8\u5968\u3055\u308c\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">transition: all \u306e\u4f7f\u3044\u65b9\u3068\u6ce8\u610f\u70b9<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"transition: all \u306e\u4f7f\u3044\u65b9\u3068\u6ce8\u610f\u70b9\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-04-v2-1.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>transition: all<\/code> \u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u5909\u5316\u3059\u308b\u3059\u3079\u3066\u306eCSS\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5bfe\u3057\u3066\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u8a18\u8ff0\u91cf\u304c\u5c11\u306a\u304f\u3066\u6e08\u307f\u307e\u3059\u304c\u3001\u610f\u56f3\u3057\u306a\u3044\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3082\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u4ed8\u3044\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* transition: all \u306e\u4f8b *\/\n.card {\n  background-color: #fff;\n  color: #333;\n  padding: 16px;\n  border-radius: 8px;\n  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);\n  transition: all 0.3s ease;\n}\n\n.card:hover {\n  background-color: #EFBDB7;\n  color: #51322b;\n  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><code>width<\/code> \u3084 <code>height<\/code> \u306a\u3069\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u4e0d\u8981\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3082\u9069\u7528\u3055\u308c\u3066\u3057\u307e\u3046\u5834\u5408\u304c\u3042\u308b<\/li>\n<li>\u30d6\u30e9\u30a6\u30b6\u304c\u5168\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5909\u5316\u3092\u76e3\u8996\u3059\u308b\u305f\u3081CPU\u8ca0\u8377\u304c\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u308b<\/li>\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\u306f\u3001\u5fc5\u8981\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u3060\u3051\u3092\u500b\u5225\u306b\u6307\u5b9a\u3059\u308b\u306e\u304c\u63a8\u5968<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">timing-function\uff08\u901f\u5ea6\u30ab\u30fc\u30d6\uff09\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18118-2\"><img decoding=\"async\" width=\"1672\" height=\"941\" alt=\"\u901f\u5ea6\u30ab\u30fc\u30d6\u306e\u4f7f\u3044\u5206\u3051\" class=\"wp-image-20859\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-02.jpg\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-02.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-02-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-02-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\"><code>timing-function<\/code> \u306f\u3001\u5909\u5316\u306e\u300c\u52a0\u901f\u30fb\u6e1b\u901f\u306e\u30ab\u30fc\u30d6\u300d\u3092\u6307\u5b9a\u3059\u308b\u5024\u3067\u3059\u3002\u540c\u30580.3\u79d2\u3067\u3082\u3001\u30ab\u30fc\u30d6\u304c\u9055\u3046\u3068\u52d5\u304d\u306e\u5370\u8c61\u304c\u307e\u3063\u305f\u304f\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5024<\/th><th>\u52d5\u304d<\/th><th>\u7528\u9014\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>ease<\/code>\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/td><td>\u6700\u521d\u3086\u3063\u304f\u308a\u2192\u4e2d\u9593\u901f\u3044\u2192\u6700\u5f8c\u3086\u3063\u304f\u308a<\/td><td>\u6c4e\u7528\u3002\u5927\u534a\u306e\u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8\u306b\u9069\u3059\u308b<\/td><\/tr><tr><td><code>ease-in<\/code><\/td><td>\u6700\u521d\u3086\u3063\u304f\u308a\u2192\u3060\u3093\u3060\u3093\u901f\u304f\u306a\u308b<\/td><td>\u8981\u7d20\u304c\u6d88\u3048\u3066\u3044\u304f\u30fb\u30d5\u30a7\u30fc\u30c9\u30a2\u30a6\u30c8\u7cfb<\/td><\/tr><tr><td><code>ease-out<\/code><\/td><td>\u6700\u521d\u901f\u3044\u2192\u3060\u3093\u3060\u3093\u3086\u3063\u304f\u308a\u306b\u306a\u308b<\/td><td>\u8981\u7d20\u304c\u98db\u3073\u8fbc\u3093\u3067\u304f\u308b\u30fb\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\u7cfb<\/td><\/tr><tr><td><code>ease-in-out<\/code><\/td><td>\u6700\u521d\u3068\u6700\u5f8c\u3086\u3063\u304f\u308a\u30fb\u4e2d\u9593\u901f\u3044<\/td><td>\u30b9\u30e9\u30a4\u30c0\u30fc\u30fb\u30e2\u30fc\u30c0\u30eb\u958b\u9589\u306a\u3069\u6ed1\u3089\u304b\u306a\u52d5\u304d<\/td><\/tr><tr><td><code>linear<\/code><\/td><td>\u4e00\u5b9a\u901f\u5ea6\u3067\u5909\u5316<\/td><td>\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u30d0\u30fc\u30fb\u56de\u8ee2\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/td><\/tr><tr><td><code>cubic-bezier()<\/code><\/td><td>\u81ea\u7531\u306b\u30ab\u30fc\u30d6\u3092\u5b9a\u7fa9<\/td><td>\u30d0\u30a6\u30f3\u30b9\u30fb\u30aa\u30fc\u30d0\u30fc\u30b7\u30e5\u30fc\u30c8\u306a\u3069\u72ec\u81ea\u306e\u52d5\u304d<\/td><\/tr><tr><td><code>steps()<\/code><\/td><td>\u30d1\u30e9\u30d1\u30e9\u6f2b\u753b\u306e\u3088\u3046\u306b\u6bb5\u968e\u7684\u306b\u5909\u5316<\/td><td>\u30b9\u30d7\u30e9\u30a4\u30c8\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/td><\/tr><\/tbody><\/table><\/figure>\n<h3 class=\"wp-block-heading\">cubic-bezier\u3067\u72ec\u81ea\u30ab\u30fc\u30d6\u3092\u4f5c\u308b<\/h3>\n<p class=\"wp-block-paragraph\"><code>cubic-bezier(x1, y1, x2, y2)<\/code> \u3092\u4f7f\u3046\u3068\u30014\u3064\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30dd\u30a4\u30f3\u30c8\u3067\u72ec\u81ea\u306e\u901f\u5ea6\u30ab\u30fc\u30d6\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<a href=\"https:\/\/cubic-bezier.com\/\" rel=\"noopener\" target=\"_blank\">cubic-bezier.com<\/a> \u3068\u3044\u3046\u30d3\u30b8\u30e5\u30a2\u30eb\u30c4\u30fc\u30eb\u3067\u8996\u899a\u7684\u306b\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30d0\u30a6\u30f3\u30b9\u611f\u306e\u3042\u308b\u52d5\u304d *\/\n.bounce-btn {\n  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);\n}\n\n.bounce-btn:hover {\n  transform: scale(1.1);\n}\n\n\/* \u30b9\u30d1\u30c3\u3068\u7d20\u65e9\u304f\u7d42\u308f\u308b\u52d5\u304d *\/\n.snappy-btn {\n  transition: background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1);\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">\u8907\u6570\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5225\u3005\u306e\u6642\u9593\u3067\u5909\u5316\u3055\u305b\u308b<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u8907\u6570\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5225\u3005\u306e\u6642\u9593\u3067\u5909\u5316\u3055\u305b\u308b\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-06-v2-1.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">\u8907\u6570\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5bfe\u3057\u3066\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u6642\u9593\u3084\u30ab\u30fc\u30d6\u3092\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u8907\u6570\u306etransition\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u8907\u6570\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u500b\u5225\u306etransition\u3092\u6307\u5b9a *\/\n.multi-transition {\n  background-color: #d16176;\n  color: #fff;\n  transform: translateY(0);\n  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);\n\n  \/* \u30ab\u30f3\u30de\u3067\u533a\u5207\u3063\u3066\u8907\u6570\u6307\u5b9a *\/\n  transition:\n    background-color 0.2s ease,\n    transform 0.3s ease-out,\n    box-shadow 0.3s ease;\n}\n\n.multi-transition:hover {\n  background-color: #51322b;\n  transform: translateY(-4px);\n  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001\u80cc\u666f\u8272\u306f0.2\u79d2\u30fbtransform\u306f0.3\u79d2\u30fbbox-shadow\u306f0.3\u79d2\u3068\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u6642\u9593\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3055\u305b\u3066\u3044\u307e\u3059\u3002\u7d30\u304b\u3044\u6642\u9593\u5dee\u3092\u4ed8\u3051\u308b\u3053\u3068\u3067\u3001\u52d5\u304d\u306b\u6df1\u307f\u304c\u751f\u307e\u308c\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">\u5b9f\u7528\u30d1\u30fc\u30c4\u96c6\uff5c\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308btransition\u30b3\u30fc\u30c9<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u5b9f\u7528\u30d1\u30fc\u30c4\u96c6\uff5c\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308btransition\u30b3\u30fc\u30c9\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-07-v2.jpg\"\/><\/figure>\n<h3 class=\"wp-block-heading\">1. \u5b9a\u756a\u30db\u30d0\u30fc\u30dc\u30bf\u30f3\uff08\u8272\u5909\u5316\uff0b\u4e0a\u306b\u6d6e\u304f\uff09<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;a href=\"#\" class=\"cta-button\"&gt;\u8a73\u3057\u304f\u898b\u308b&lt;\/a&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.cta-button {\n  display: inline-block;\n  background-color: #d16176;\n  color: #fff;\n  text-decoration: none;\n  padding: 14px 40px;\n  border-radius: 30px;\n  font-size: 16px;\n  font-weight: bold;\n  letter-spacing: 0.05em;\n  transition:\n    background-color 0.25s ease,\n    transform 0.25s ease,\n    box-shadow 0.25s ease;\n}\n\n.cta-button:hover {\n  background-color: #51322b;\n  transform: translateY(-3px);\n  box-shadow: 0 8px 20px rgba(81, 50, 43, 0.3);\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">2. \u30ab\u30fc\u30c9\u304c\u3075\u308f\u3063\u3068\u6d6e\u304f\u30a8\u30d5\u30a7\u30af\u30c8<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;div class=\"hover-card\"&gt;\n  &lt;h3&gt;\u30ab\u30fc\u30c9\u30bf\u30a4\u30c8\u30eb&lt;\/h3&gt;\n  &lt;p&gt;\u30ab\u30fc\u30c9\u306e\u8aac\u660e\u30c6\u30ad\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002&lt;\/p&gt;\n&lt;\/div&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.hover-card {\n  background: #fff;\n  border-radius: 12px;\n  padding: 24px;\n  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);\n  transition:\n    transform 0.3s ease,\n    box-shadow 0.3s ease;\n  cursor: pointer;\n}\n\n.hover-card:hover {\n  transform: translateY(-8px);\n  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">3. \u30c6\u30ad\u30b9\u30c8\u30ea\u30f3\u30af\u306e\u4e0b\u7dda\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/h3>\n<p class=\"wp-block-paragraph\">\u4e0b\u7dda\u304c\u5de6\u304b\u3089\u53f3\u306b\u30b9\u30e9\u30a4\u30c9\u3059\u308b\u30a8\u30d5\u30a7\u30af\u30c8\u3067\u3059\u3002<code>::after<\/code> \u64ec\u4f3c\u8981\u7d20\u3068\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;a href=\"#\" class=\"underline-link\"&gt;\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30ea\u30f3\u30af&lt;\/a&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.underline-link {\n  position: relative;\n  color: #d16176;\n  text-decoration: none;\n  display: inline-block;\n}\n\n.underline-link::after {\n  content: '';\n  position: absolute;\n  bottom: -2px;\n  left: 0;\n  width: 0;\n  height: 2px;\n  background-color: #d16176;\n  transition: width 0.3s ease;\n}\n\n.underline-link:hover::after {\n  width: 100%;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">4. \u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30e1\u30cb\u30e5\u30fc\u306e\u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;nav&gt;\n  &lt;ul class=\"nav-list\"&gt;\n    &lt;li&gt;&lt;a href=\"#\" class=\"nav-item\"&gt;\u30db\u30fc\u30e0&lt;\/a&gt;&lt;\/li&gt;\n    &lt;li&gt;&lt;a href=\"#\" class=\"nav-item\"&gt;\u30b5\u30fc\u30d3\u30b9&lt;\/a&gt;&lt;\/li&gt;\n    &lt;li&gt;&lt;a href=\"#\" class=\"nav-item\"&gt;\u4f1a\u793e\u6982\u8981&lt;\/a&gt;&lt;\/li&gt;\n    &lt;li&gt;&lt;a href=\"#\" class=\"nav-item\"&gt;\u304a\u554f\u3044\u5408\u308f\u305b&lt;\/a&gt;&lt;\/li&gt;\n  &lt;\/ul&gt;\n&lt;\/nav&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.nav-list {\n  display: flex;\n  list-style: none;\n  gap: 8px;\n  margin: 0;\n  padding: 0;\n}\n\n.nav-item {\n  display: block;\n  padding: 10px 20px;\n  color: #51322b;\n  text-decoration: none;\n  border-radius: 4px;\n  background-color: transparent;\n  transition:\n    background-color 0.2s ease,\n    color 0.2s ease;\n}\n\n.nav-item:hover {\n  background-color: #EFBDB7;\n  color: #51322b;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">5. \u30d5\u30a9\u30fc\u30e0\u5165\u529b\u6b04\u306e\u30d5\u30a9\u30fc\u30ab\u30b9\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;input type=\"text\" class=\"animated-input\" placeholder=\"\u304a\u540d\u524d\u3092\u5165\u529b\"&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.animated-input {\n  width: 100%;\n  padding: 12px 16px;\n  border: 2px solid #ddd;\n  border-radius: 6px;\n  font-size: 16px;\n  outline: none;\n  box-sizing: border-box;\n  transition:\n    border-color 0.2s ease,\n    box-shadow 0.2s ease;\n}\n\n.animated-input:focus {\n  border-color: #d16176;\n  box-shadow: 0 0 0 3px rgba(209, 97, 118, 0.2);\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">6. \u30cf\u30f3\u30d0\u30fc\u30ac\u30fc\u30e1\u30cb\u30e5\u30fc\u30a2\u30a4\u30b3\u30f3\u306e\u5909\u5316\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;!-- HTML --&gt;\n&lt;button class=\"hamburger\" id=\"hamburger\"&gt;\n  &lt;span class=\"bar\"&gt;&lt;\/span&gt;\n  &lt;span class=\"bar\"&gt;&lt;\/span&gt;\n  &lt;span class=\"bar\"&gt;&lt;\/span&gt;\n&lt;\/button&gt;<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS *\/\n.hamburger {\n  background: none;\n  border: none;\n  cursor: pointer;\n  padding: 8px;\n  display: flex;\n  flex-direction: column;\n  gap: 6px;\n}\n\n.bar {\n  display: block;\n  width: 28px;\n  height: 3px;\n  background-color: #51322b;\n  border-radius: 2px;\n  transition:\n    transform 0.3s ease,\n    opacity 0.3s ease;\n}\n\n\/* .open \u30af\u30e9\u30b9\u304c\u4ed8\u3044\u305f\u3068\u304d\u306b\u30d0\u30c4\u5370\u306b\u5909\u5316 *\/\n.hamburger.open .bar:nth-child(1) {\n  transform: translateY(9px) rotate(45deg);\n}\n\n.hamburger.open .bar:nth-child(2) {\n  opacity: 0;\n  transform: scaleX(0);\n}\n\n.hamburger.open .bar:nth-child(3) {\n  transform: translateY(-9px) rotate(-45deg);\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">transition\u3068animation\u306e\u4f7f\u3044\u5206\u3051<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18118-3\"><img decoding=\"async\" width=\"1672\" height=\"941\" alt=\"transition \u3068 animation\" class=\"wp-image-20860\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-03.jpg\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-03.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-03-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-03-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\"><code>transition<\/code> \u3068 <code>animation<\/code>\uff08<code>@keyframes<\/code>\uff09\u306f\u3069\u3061\u3089\u3082CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u624b\u6bb5\u3067\u3059\u304c\u3001\u7528\u9014\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002<\/p>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6bd4\u8f03\u9805\u76ee<\/th><th>transition<\/th><th>animation\uff08@keyframes\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u767a\u706b\u306e\u30bf\u30a4\u30df\u30f3\u30b0<\/td><td>\u72b6\u614b\u5909\u5316\uff08:hover, :focus\u306a\u3069\uff09\u304c\u5fc5\u8981<\/td><td>\u30da\u30fc\u30b8\u30ed\u30fc\u30c9\u6642\u306a\u3069\u81ea\u52d5\u518d\u751f\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u7e70\u308a\u8fd4\u3057<\/td><td>\u57fa\u672c\u7684\u306b1\u56de\u306e\u307f<\/td><td>\u7121\u9650\u30eb\u30fc\u30d7\uff08infinite\uff09\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u4e2d\u9593\u70b9\u306e\u8a2d\u5b9a<\/td><td>\u958b\u59cb\u3068\u7d42\u4e86\u306e2\u70b9\u306e\u307f<\/td><td>0%\u301c100%\u3067\u8907\u6570\u306e\u4e2d\u9593\u70b9\u3092\u8a2d\u5b9a\u53ef\u80fd<\/td><\/tr><tr><td>\u8a18\u8ff0\u306e\u7c21\u4fbf\u3055<\/td><td>\u30b7\u30f3\u30d7\u30eb\uff081\u884c\u301c2\u884c\uff09<\/td><td>@keyframes\u3068animation\u306e\u4e21\u65b9\u304c\u5fc5\u8981<\/td><\/tr><tr><td>\u9069\u3057\u305f\u7528\u9014<\/td><td>\u30db\u30d0\u30fc\u30fb\u30d5\u30a9\u30fc\u30ab\u30b9\u30fb\u30af\u30ea\u30c3\u30af\u6642\u306e\u5909\u5316<\/td><td>\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u30fb\u5e38\u6642\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30fb\u8907\u96d1\u306a\u52d5\u304d<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">\u307e\u3068\u3081\u308b\u3068\u3001<strong>\u30e6\u30fc\u30b6\u30fc\u306e\u64cd\u4f5c\u306b\u9023\u52d5\u3057\u305f\u5909\u5316\u306b\u306f <code>transition<\/code>\u3001\u305d\u308c\u4ee5\u5916\u306e\u81ea\u52d5\u518d\u751f\u30fb\u7e70\u308a\u8fd4\u3057\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u306f <code>animation<\/code><\/strong> \u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* transition \u304c\u5411\u3044\u3066\u3044\u308b\u4f8b\uff1a\u30db\u30d0\u30fc\u3067\u8272\u304c\u5909\u308f\u308b\u30dc\u30bf\u30f3 *\/\n.btn {\n  background-color: #d16176;\n  transition: background-color 0.3s ease;\n}\n.btn:hover {\n  background-color: #51322b;\n}\n\n\/* animation \u304c\u5411\u3044\u3066\u3044\u308b\u4f8b\uff1a\u5e38\u306b\u304f\u308b\u304f\u308b\u56de\u308b\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u30a2\u30a4\u30b3\u30f3 *\/\n.spinner {\n  width: 40px;\n  height: 40px;\n  border: 4px solid #EFBDB7;\n  border-top-color: #d16176;\n  border-radius: 50%;\n  animation: spin 0.8s linear infinite;\n}\n\n@keyframes spin {\n  to {\n    transform: rotate(360deg);\n  }\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">transition\u304c\u52b9\u304b\u306a\u3044\u3088\u304f\u3042\u308b\u5931\u6557\u3068\u539f\u56e0<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18118-4\"><img decoding=\"async\" width=\"1672\" height=\"941\" alt=\"\u52b9\u304b\u306a\u3044\u6642\u306e\u78ba\u8a8d\u9806\" class=\"wp-image-20861\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-04.jpg\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-04.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-04-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-section-04-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">\u521d\u5fc3\u8005\u304c\u3064\u307e\u305a\u304d\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3092\u307e\u3068\u3081\u307e\u3059\u3002transition\u304c\u52d5\u304b\u306a\u3044\u3068\u304d\u306f\u3001\u307e\u305a\u3053\u308c\u3089\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u5931\u65571\uff1a\u5909\u5316\u524d\u5f8c\u306e\u5024\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">transition\u306f\u300cA\uff08\u5909\u5316\u524d\uff09\u304b\u3089B\uff08\u5909\u5316\u5f8c\uff09\u300d\u3078\u306e\u79fb\u884c\u3092\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3057\u307e\u3059\u3002\u3069\u3061\u3089\u304b\u306e\u5024\u304c\u306a\u3051\u308c\u3070\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3057\u307e\u305b\u3093\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\u4f8b\uff1a\u901a\u5e38\u72b6\u614b\u306bbackground-color\u304c\u306a\u3044 *\/\n.btn {\n  transition: background-color 0.3s ease;\n  \/* background-color\u306e\u521d\u671f\u5024\u304c\u306a\u3044\u305f\u3081\u52d5\u304b\u306a\u3044\u5834\u5408\u304c\u3042\u308b *\/\n}\n.btn:hover {\n  background-color: #d16176;\n}\n\n\/* OK\u4f8b\uff1a\u901a\u5e38\u72b6\u614b\u306b\u3082\u5024\u3092\u660e\u793a\u3059\u308b *\/\n.btn {\n  background-color: transparent; \/* \u307e\u305f\u306f\u5177\u4f53\u7684\u306a\u8272 *\/\n  transition: background-color 0.3s ease;\n}\n.btn:hover {\n  background-color: #d16176;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">\u5931\u65572\uff1adisplay:none\u3068transition\u306f\u76f8\u6027\u304c\u60aa\u3044<\/h3>\n<p class=\"wp-block-paragraph\"><code>display: none<\/code> \u304b\u3089 <code>display: block<\/code> \u3078\u306e\u5909\u5316\u306ftransition\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u304d\u307e\u305b\u3093\u3002\u8981\u7d20\u306e\u8868\u793a\u30fb\u975e\u8868\u793a\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u306f <code>opacity<\/code> \u3068 <code>visibility<\/code> \u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\u4f8b\uff1adisplay:none\/block\u306etransition\u306f\u52d5\u304b\u306a\u3044 *\/\n.menu {\n  display: none;\n  transition: display 0.3s ease; \/* \u52b9\u304b\u306a\u3044 *\/\n}\n.menu.open {\n  display: block;\n}\n\n\/* OK\u4f8b\uff1aopacity + visibility \u3067\u4ee3\u66ff\u3059\u308b *\/\n.menu {\n  opacity: 0;\n  visibility: hidden;\n  transition:\n    opacity 0.3s ease,\n    visibility 0.3s ease;\n}\n.menu.open {\n  opacity: 1;\n  visibility: visible;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">\u5931\u65573\uff1aheight: auto \u3078\u306etransition\u306f\u52d5\u304b\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\"><code>height: 0<\/code> \u304b\u3089 <code>height: auto<\/code> \u3078\u306e\u5909\u5316\u306ftransition\u3067\u304d\u307e\u305b\u3093\u3002<code>max-height<\/code> \u3092\u4ee3\u308f\u308a\u306b\u4f7f\u3046\u304b\u3001JavaScript\u3067px\u5024\u3092\u52d5\u7684\u306b\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\u4f8b *\/\n.accordion-content {\n  height: 0;\n  overflow: hidden;\n  transition: height 0.3s ease; \/* height:auto\u306b\u306f\u52b9\u304b\u306a\u3044 *\/\n}\n.accordion-content.open {\n  height: auto; \/* \u52d5\u304b\u306a\u3044 *\/\n}\n\n\/* OK\u4f8b\uff1amax-height\u3092\u4f7f\u3046\uff08\u4f59\u88d5\u306e\u3042\u308b\u5024\u3092\u8a2d\u5b9a\u3059\u308b\uff09 *\/\n.accordion-content {\n  max-height: 0;\n  overflow: hidden;\n  transition: max-height 0.5s ease;\n}\n.accordion-content.open {\n  max-height: 500px; \/* \u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u6700\u5927\u9ad8\u3055\u3088\u308a\u5927\u304d\u3044\u5024 *\/\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">\u5931\u65574\uff1atransition\u304c\u5909\u5316\u5f8c\u306e\u8981\u7d20\u306b\u66f8\u304b\u308c\u3066\u3044\u308b<\/h3>\n<p class=\"wp-block-paragraph\">transition\u306f\u901a\u5e38\u72b6\u614b\u306e\u8981\u7d20\u306b\u66f8\u304f\u306e\u304c\u57fa\u672c\u3067\u3059\u3002:hover\u5074\u306b\u66f8\u304f\u3068\u3001\u300c\u30db\u30d0\u30fc\u3057\u305f\u3068\u304d\u300d\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u52d5\u3044\u3066\u3082\u300c\u30db\u30d0\u30fc\u3092\u5916\u3057\u305f\u3068\u304d\u300d\u306f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u3057\u3067\u77ac\u9593\u7684\u306b\u623b\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u25b3 \u7247\u65b9\u5411\u3060\u3051\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3059\u308b\uff08\u623b\u308a\u306f\u77ac\u9593\uff09 *\/\n.btn {\n  background-color: #d16176;\n}\n.btn:hover {\n  background-color: #51322b;\n  transition: background-color 0.3s ease; \/* \u30db\u30d0\u30fc\u6642\u306e\u307f\u52b9\u304f *\/\n}\n\n\/* OK\uff1a\u4e21\u65b9\u5411\u3068\u3082\u306a\u3081\u3089\u304b\u306b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3059\u308b *\/\n.btn {\n  background-color: #d16176;\n  transition: background-color 0.3s ease; \/* \u901a\u5e38\u72b6\u614b\u306b\u66f8\u304f *\/\n}\n.btn:hover {\n  background-color: #51322b;\n}<\/code><\/pre><\/div>\n<h3 class=\"wp-block-heading\">\u5931\u65575\uff1atransform\u3068transition\u306e\u4e21\u65b9\u304c\u5fc5\u8981\u306a\u306e\u306b\u3069\u3061\u3089\u304b\u304c\u6b20\u3051\u3066\u3044\u308b<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\u4f8b\uff1atransition\u306a\u3057\u3067\u306f\u30d1\u30c3\u3068\u79fb\u52d5\u3059\u308b\u3060\u3051 *\/\n.card {\n  \/* transition\u304c\u306a\u3044 *\/\n}\n.card:hover {\n  transform: translateY(-8px);\n}\n\n\/* OK\u4f8b *\/\n.card {\n  transition: transform 0.3s ease;\n}\n.card:hover {\n  transform: translateY(-8px);\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305ftransition\u306e\u66f8\u304d\u65b9<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305ftransition\u306e\u66f8\u304d\u65b9\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-10-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">transition\u306f\u30d6\u30e9\u30a6\u30b6\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u9ad8\u3044\u9806\u306b\u3001\u4ee5\u4e0b\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/th><th>\u30d7\u30ed\u30d1\u30c6\u30a3<\/th><th>\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>\u9ad8\u3044\uff08\u63a8\u5968\uff09<\/td><td><code>transform<\/code>, <code>opacity<\/code><\/td><td>GPU\u30b3\u30f3\u30dd\u30b8\u30c3\u30c8\u30ec\u30a4\u30e4\u30fc\u3067\u51e6\u7406\u3055\u308c\u308b<\/td><\/tr><tr><td>\u4e2d\u7a0b\u5ea6<\/td><td><code>color<\/code>, <code>background-color<\/code>, <code>box-shadow<\/code><\/td><td>\u30da\u30a4\u30f3\u30c8\u304c\u767a\u751f\u3059\u308b\u304c\u5f71\u97ff\u306f\u5c0f\u3055\u3044<\/td><\/tr><tr><td>\u4f4e\u3044\uff08\u6ce8\u610f\uff09<\/td><td><code>width<\/code>, <code>height<\/code>, <code>margin<\/code>, <code>padding<\/code>, <code>top<\/code>, <code>left<\/code><\/td><td>\u30ec\u30a4\u30a2\u30a6\u30c8\u518d\u8a08\u7b97\uff08\u30ea\u30d5\u30ed\u30fc\uff09\u304c\u767a\u751f\u3059\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">\u8981\u7d20\u3092\u52d5\u304b\u3057\u305f\u3044\u3068\u304d\u306f <code>margin<\/code> \u3084 <code>top\/left<\/code> \u3067\u306f\u306a\u304f <code>transform: translate()<\/code> \u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002\u8996\u899a\u7684\u306a\u7d50\u679c\u306f\u540c\u3058\u3067\u3082\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5dee\u304c\u51fa\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG\u4f8b\uff1amargin\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\uff08\u30ea\u30d5\u30ed\u30fc\u767a\u751f\uff09 *\/\n.card {\n  margin-top: 0;\n  transition: margin-top 0.3s ease;\n}\n.card:hover {\n  margin-top: -8px;\n}\n\n\/* OK\u4f8b\uff1atransform\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\uff08GPU\u3067\u51e6\u7406\uff09 *\/\n.card {\n  transform: translateY(0);\n  transition: transform 0.3s ease;\n}\n.card:hover {\n  transform: translateY(-8px);\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">will-change\u3067\u3055\u3089\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"will-change\u3067\u3055\u3089\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-11-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>will-change<\/code> \u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3046\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u306b\u300c\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u308b\u4e88\u5b9a\u300d\u3068\u3044\u3046\u4e8b\u524d\u60c5\u5831\u3092\u4e0e\u3048\u3001\u51e6\u7406\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4e71\u7528\u3059\u308b\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5897\u3048\u308b\u305f\u3081\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u591a\u3044\u8981\u7d20\u306b\u9650\u5b9a\u3057\u3066\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* transform\u3068opacity\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u6700\u9069\u5316 *\/\n.animated-card {\n  will-change: transform, opacity;\n  transition: transform 0.3s ease, opacity 0.3s ease;\n}\n\n.animated-card:hover {\n  transform: translateY(-8px);\n  opacity: 0.9;\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u3067\u306etransition\u8003\u616e<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u30c7\u30b6\u30a4\u30f3\u3067\u306etransition\u8003\u616e\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-12-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">\u30e2\u30d0\u30a4\u30eb\u7aef\u672b\u3067\u306f\u30db\u30d0\u30fc\u72b6\u614b\u304c\u767a\u751f\u3057\u306a\u3044\uff08\u30bf\u30c3\u30d7\uff09\u305f\u3081\u3001\u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u30b9\u30de\u30db\u3067\u610f\u56f3\u305b\u305a\u6b8b\u7559\u3059\u308b\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002<code>@media (hover: hover)<\/code> \u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30db\u30d0\u30fc\u304c\u6709\u52b9\u306a\u7aef\u672b\u306b\u3060\u3051\u30a8\u30d5\u30a7\u30af\u30c8\u3092\u9069\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30db\u30d0\u30fc\u304c\u6709\u52b9\u306a\u74b0\u5883\u3067\u306e\u307f\u30a8\u30d5\u30a7\u30af\u30c8\u3092\u9069\u7528 *\/\n@media (hover: hover) {\n  .btn:hover {\n    background-color: #51322b;\n    transform: translateY(-3px);\n  }\n\n  .card:hover {\n    transform: translateY(-8px);\n    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);\n  }\n}\n\n\/* transition\u306f\u5e38\u306b\u8a18\u8ff0\uff08\u30d5\u30a9\u30fc\u30ab\u30b9\u6642\u306b\u3082\u52b9\u304f\u305f\u3081\uff09 *\/\n.btn {\n  background-color: #d16176;\n  transition: background-color 0.25s ease, transform 0.25s ease;\n}\n\n.card {\n  transition: transform 0.3s ease, box-shadow 0.3s ease;\n}<\/code><\/pre><\/div>\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-13-v2.jpg\"\/><\/figure>\n<h3 class=\"wp-block-heading\">Q1. transition\u306fIE\uff08Internet Explorer\uff09\u3067\u3082\u4f7f\u3048\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">IE 10\u30fb11\u3067\u306f\u30d9\u30f3\u30c0\u30fc\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u306a\u3057\u3067 <code>transition<\/code> \u304c\u4f7f\u3048\u307e\u3059\u3002\u305f\u3060\u3057\u3001IE 9\u4ee5\u4e0b\u306ftransition\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u305b\u3093\u30022026\u5e74\u73fe\u5728\u3001Microsoft\u306f2022\u5e74\u306bIE\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u7d42\u4e86\u3057\u3066\u304a\u308a\u3001IE\u5bfe\u5fdc\u306f\u5b9f\u52d9\u4e0a\u307b\u307c\u4e0d\u8981\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\uff08Chrome\u30fbFirefox\u30fbSafari\u30fbEdge\uff09\u3067\u306f\u5b8c\u5168\u306b\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q2. transition\u3068transform\u306f\u4f55\u304c\u9055\u3044\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><code>transition<\/code> \u306f\u300c\u5909\u5316\u3092\u306a\u3081\u3089\u304b\u306b\u3059\u308b\u4ed5\u7d44\u307f\u300d\u3067\u3001<code>transform<\/code> \u306f\u300c\u8981\u7d20\u306e\u79fb\u52d5\u30fb\u56de\u8ee2\u30fb\u62e1\u5927\u7e2e\u5c0f\u3092\u6307\u5b9a\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u300d\u3067\u3059\u3002\u5225\u3005\u306e\u5f79\u5272\u3092\u6301\u3061\u307e\u3059\u3002\u300ctransform\u3092transition\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u300d\u3068\u3044\u3046\u5f62\u3067\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3044\u307e\u3059\u3002transition\u5358\u4f53\u3067\u306f\u4f55\u3082\u5909\u5316\u305b\u305a\u3001\u5909\u5316\u3055\u305b\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\uff08color\u3084transform\u306a\u3069\uff09\u304c\u5225\u9014\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q3. transition\u306bduration\u3092\u6307\u5b9a\u3057\u306a\u304b\u3063\u305f\u3089\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">duration\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306f <code>0s<\/code>\uff080\u79d2\uff09\u3067\u3059\u3002\u7701\u7565\u3057\u305f\u5834\u5408\u306f0\u79d2\u3067\u5909\u5316\u304c\u5b8c\u4e86\u3059\u308b\u305f\u3081\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u3057\uff08\u77ac\u9593\u7684\u306a\u5207\u308a\u66ff\u308f\u308a\uff09\u3068\u540c\u3058\u898b\u305f\u76ee\u306b\u306a\u308a\u307e\u3059\u3002\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u78ba\u8a8d\u3057\u305f\u3044\u5834\u5408\u306f\u5fc5\u305aduration\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u4f8b\uff1a<code>0.3s<\/code>\uff09\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q4. CSS transition\u3060\u3051\u3067\u30e2\u30fc\u30c0\u30eb\u306e\u8868\u793a\u30fb\u975e\u8868\u793a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u308c\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">\u306f\u3044\u3001\u4f5c\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001<code>display: none<\/code> \u2192 <code>display: block<\/code> \u306e\u5207\u308a\u66ff\u3048\u3067\u306ftransition\u304c\u52b9\u304b\u306a\u3044\u305f\u3081\u3001<code>opacity<\/code> \u3068 <code>visibility<\/code> \u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u4f7f\u3044\u307e\u3059\u3002\u30e2\u30fc\u30c0\u30eb\u3092\u975e\u8868\u793a\u306b\u3059\u308b\u3068\u304d <code>opacity: 0; visibility: hidden;<\/code>\u3001\u8868\u793a\u3059\u308b\u3068\u304d <code>opacity: 1; visibility: visible;<\/code> \u3068\u3057\u3001\u4e21\u65b9\u306btransition\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u8868\u793a\u30fb\u975e\u8868\u793a\u306e\u5207\u308a\u66ff\u3048\u81ea\u4f53\u306fJavaScript\u3067\u30af\u30e9\u30b9\u306e\u4ed8\u3051\u5916\u3057\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q5. transition\u306edelay\u306f\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u4f7f\u3044\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">delay\u306f\u300c\u5909\u5316\u304c\u59cb\u307e\u308b\u307e\u3067\u306e\u5f85\u6a5f\u6642\u9593\u300d\u3067\u3059\u3002\u4e3b\u306a\u6d3b\u7528\u4f8b\u306f\u3001\u8907\u6570\u8981\u7d20\u3092\u5c11\u3057\u305a\u3064\u6642\u9593\u5dee\u3067\u8868\u793a\u3059\u308b\u30b9\u30bf\u30ac\u30fc\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3084\u3001\u30c9\u30ed\u30c3\u30d7\u30c0\u30a6\u30f3\u30e1\u30cb\u30e5\u30fc\u3092\u30db\u30d0\u30fc\u5f8c0.2\u79d2\u5f85\u3063\u3066\u304b\u3089\u958b\u304f\uff08\u8aa4\u30db\u30d0\u30fc\u9632\u6b62\uff09\u7528\u9014\u306a\u3069\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001\u30ea\u30b9\u30c8\u306e\u5404\u30a2\u30a4\u30c6\u30e0\u3092\u6642\u9593\u5dee\u3067\u8868\u793a\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u5404\u30ea\u30b9\u30c8\u30a2\u30a4\u30c6\u30e0\u306b\u6642\u9593\u5dee\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3 *\/\n.list-item {\n  opacity: 0;\n  transform: translateY(20px);\n  transition: opacity 0.4s ease, transform 0.4s ease;\n}\n\n.list-item.visible {\n  opacity: 1;\n  transform: translateY(0);\n}\n\n.list-item:nth-child(1) { transition-delay: 0s; }\n.list-item:nth-child(2) { transition-delay: 0.1s; }\n.list-item:nth-child(3) { transition-delay: 0.2s; }\n.list-item:nth-child(4) { transition-delay: 0.3s; }\n.list-item:nth-child(5) { transition-delay: 0.4s; }<\/code><\/pre><\/div>\n\n<!-- withmedia-related -->\n\n<!-- withmedia-faq-schema -->\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"transition\u306fIE\uff08Internet Explorer\uff09\u3067\u3082\u4f7f\u3048\u307e\u3059\u304b\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"IE 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src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-14-v2.jpg\"\/><\/figure>\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-button-design-hover\/\">CSS\u30dc\u30bf\u30f3\u30c7\u30b6\u30a4\u30f330\u9078\uff5c\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u304a\u3057\u3083\u308c\u306a\u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8\u96c6<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-animation-rotation\/\">CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u56de\u8ee2\u3092\u5b8c\u5168\u30ac\u30a4\u30c9|\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-loading-animation\/\">CSS\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u96c6\uff5c\u30b3\u30d4\u30da\u3067\u5373\u4f7f\u3048\u308b\u5b9f\u88c5\u30b5\u30f3\u30d7\u30eb20<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-scroll\/\">CSS\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30102026\u5e74\u7248\u3011JavaScript\u4e0d\u8981\u306e\u5b9f\u88c5\u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-modern-ui-components-30\/\">\u3010\u30b3\u30d4\u30da\u53ef\u3011CSS\u3060\u3051\u3067\u4f5c\u308b\u30e2\u30c0\u30f3UI\u30d1\u30fc\u30c430\u9078\uff5c\u5b9f\u88c5\u30b3\u30fc\u30c9\u5168\u90e8\u8f09\u305b<\/a><\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-transition-15-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">CSS\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u300c\u30ec\u30a4\u30a2\u30a6\u30c8\u30fb\u88c5\u98fe\u30fb\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30fb\u57fa\u790e\u30fb\u30c8\u30e9\u30d6\u30eb\u89e3\u6c7a\u300d\u306e\u76ee\u7684\u5225\u306b\u63a2\u305b\u308b\u7dcf\u307e\u3068\u3081\u30da\u30fc\u30b8\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u88c5\u3067\u8ff7\u3063\u305f\u3068\u304d\u306e\u7d22\u5f15\u3068\u3057\u3066\u3069\u3046\u305e\u3002<\/p>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-webdesign-technique-map\/\">\u3010CSS\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u5b8c\u5168\u30de\u30c3\u30d7\u3011\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308bWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u30ac\u30a4\u30c9\u7dcf\u307e\u3068\u3081<\/a><\/li>\n<\/ul>\n<!-- addon:newlink-kf-fi-v1 -->\n<p class=\"wp-block-paragraph\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044\uff1a<a href=\"https:\/\/withcode.tech\/media\/css-keyframes-animation\/\">CSS @keyframes\u306e\u4f7f\u3044\u65b9\uff5c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4f5c\u308a\u65b9<\/a> \/ <a href=\"https:\/\/withcode.tech\/media\/css-fadein-scroll\/\">CSS\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\u306e\u5b9f\u88c5\u65b9\u6cd5\uff5c\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u3075\u308f\u3063\u3068\u8868\u793a<\/a><\/p>\n<h2 class=\"wp-block-heading\">AI\u30b9\u30ad\u30eb\u3067\u3001\u672a\u6765\u306e\u81ea\u5206\u3092\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\uff01<\/h2>\n<figure class=\"wp-block-image aligncenter size-large\"><a href=\"https:\/\/s.lmes.jp\/landing-qr\/2010578884-C5To3Fmv?uLand=phzKXf\" rel=\"noopener noreferrer\" target=\"_blank\"><img decoding=\"async\" width=\"1254\" height=\"1254\" alt=\"\u4eca\u306a\u3089\u5b8c\u5168\u7121\u6599\u3067AI\u3092\u5b66\u3079\u308b\uff01WithAI\" class=\"wp-image-18841\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner.jpg\" style=\"max-width:600px;width:100%;height:auto\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner.jpg 1254w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner-768x768.jpg 768w\" sizes=\"(max-width: 1254px) 100vw, 1254px\" \/><\/a><\/figure>\n<h3 class=\"wp-block-heading\">\u4eca\u306a\u3089\u5b8c\u5168\u7121\u6599\u3067AI\u3092\u5b66\u3079\u308b\uff01<\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>\u52d5\u753b\u3084\u5b9f\u8df5\u3067\u697d\u3057\u304f\u5b66\u3079\u308b<\/strong>\uff1a\u521d\u5fc3\u8005\u3067\u3082\u5b89\u5fc3\u306e\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0<\/li>\n<li><strong>\u30b9\u30de\u30db\u30fbPC\u3069\u3061\u3089\u3067\u3082OK<\/strong>\uff1a\u597d\u304d\u306a\u6642\u9593\u306b\u5b66\u7fd2\u3067\u304d\u308b<\/li>\n<li><strong>\u6599\u91d1\u306f\u4e00\u5207\u30ca\u30b7<\/strong>\uff1a<span 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