{"id":19274,"date":"2026-07-28T13:57:28","date_gmt":"2026-07-28T13:57:28","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=19274"},"modified":"2026-07-28T14:59:47","modified_gmt":"2026-07-28T14:59:47","slug":"css-typing-animation","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css-typing-animation\/","title":{"rendered":"CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4f5c\u308a\u65b9\uff5c\u30b3\u30d4\u30da\u5b9f\u88c5\u96c6"},"content":{"rendered":"<p><!-- roam:retrofit18209 --><\/p>\n<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-left\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.40.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\">\n<div class=\"c-balloon__text\">\n<p><strong>\u30c1\u30e3\u30c3\u30c8\u3084\u30bf\u30fc\u30df\u30ca\u30eb\u307f\u305f\u3044\u306b\u3001\u6587\u5b57\u304c1\u6587\u5b57\u305a\u3064\u6253\u305f\u308c\u308b\u6f14\u51fa\u3063\u3066CSS\u3067\u4f5c\u308c\u307e\u3059\u304b\uff1f<\/strong><\/p>\n<p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-right\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\">\n<div class=\"c-balloon__text\">\n<p><strong>\u4f5c\u308c\u308b\u3088\uff01steps()\u95a2\u6570\u3068width\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3001\u305d\u308c\u306b\u30ab\u30fc\u30bd\u30eb\u306e\u70b9\u6ec5\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u30b3\u30c4\u3002\u4eca\u65e5\u306f\u30b3\u30d4\u30da\u3067\u52d5\u304f\u30d1\u30bf\u30fc\u30f3\u3092\u7528\u610f\u3057\u305f\u3088\u3002<\/strong><\/p>\n<p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\">\u30bf\u30fc\u30df\u30ca\u30eb\u3084\u30c1\u30e3\u30c3\u30c8\u753b\u9762\u306e\u3088\u3046\u306b\u300c\u6587\u5b57\u304c1\u6587\u5b57\u305a\u3064\u6253\u3061\u8fbc\u307e\u308c\u3066\u3044\u304f\u300d\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3002Web\u30b5\u30a4\u30c8\u306e\u30d2\u30fc\u30ed\u30fc\u30bb\u30af\u30b7\u30e7\u30f3\u3084404\u30da\u30fc\u30b8\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5834\u6240\u3067\u898b\u304b\u3051\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u3053\u306e\u6f14\u51fa\u3001<strong><span class=\"swl-marker mark_yellow\">JavaScript\u3092\u4f7f\u308f\u305aCSS\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u307e\u3059<\/span><\/strong>\u3002\u305f\u3060\u3057\u300c\u306a\u305c\u3053\u306e\u66f8\u304d\u65b9\u306a\u306e\u304b\u300d\u3092\u7406\u89e3\u305b\u305a\u306b\u30b3\u30d4\u30da\u3059\u308b\u3068\u3001\u6587\u5b57\u6570\u304c\u5909\u308f\u3063\u305f\u3068\u304d\u306b\u58ca\u308c\u305f\u308a\u3001\u65e5\u672c\u8a9e\u3067\u3046\u307e\u304f\u52d5\u304b\u306a\u304b\u3063\u305f\u308a\u3068\u3044\u3046\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u304d\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4ed5\u7d44\u307f\u304b\u3089\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u305f\u3046\u3048\u3067\u3001\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308b\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u8907\u6570\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u30eb\u30fc\u30d7\u3055\u305b\u308b\u65b9\u6cd5\u3001\u8907\u6570\u884c\u306b\u5bfe\u5fdc\u3059\u308b\u65b9\u6cd5\u3001\u65e5\u672c\u8a9e\u3067\u306e\u6ce8\u610f\u70b9\u3001\u305d\u3057\u3066CSS\u306e\u9650\u754c\u3068JavaScript1\u884c\u3067\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u307e\u3067\u7db2\u7f85\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"wp-block-list\">\n<li>steps() \u95a2\u6570\u3068width\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u30bf\u30a4\u30d7\u30e9\u30a4\u30bf\u30fc\u52b9\u679c\u3092\u4f5c\u308b\u4ed5\u7d44\u307f<\/li>\n<li>border-right \u3067\u30ab\u30fc\u30bd\u30eb\u70b9\u6ec5\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5<\/li>\n<li>\u30eb\u30fc\u30d7\uff08\u7e70\u308a\u8fd4\u3057\uff09\u3055\u305b\u308b\u305f\u3081\u306e @keyframes \u8a2d\u8a08<\/li>\n<li>\u8907\u6570\u884c\u306e\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5<\/li>\n<li>\u65e5\u672c\u8a9e\u30c6\u30ad\u30b9\u30c8\u3067 ch \u5358\u4f4d\u304c\u4f7f\u3048\u306a\u3044\u7406\u7531\u3068\u5bfe\u51e6\u6cd5<\/li>\n<li>CSS\u306e\u9650\u754c\u3068 JavaScript 1\u884c\u3067\u52d5\u7684\u5bfe\u5fdc\u3059\u308b\u65b9\u6cd5<\/li>\n<\/ul>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4ed5\u7d44\u307f<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"19274-1\"><img decoding=\"async\" width=\"1568\" height=\"389\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-1.png\" alt=\"\u30bf\u30a4\u30d4\u30f3\u30b0\u8868\u73fe\u306e\u4ed5\u7d44\u307f\" class=\"wp-image-19375\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-1.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-1-768x191.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-1-1536x381.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u300cwidth \u3092 0 \u304b\u3089 \u6700\u7d42\u5e45\u307e\u3067\u5e83\u3052\u308b\u300d\u3053\u3068\u3067\u5b9f\u73fe\u3057\u307e\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u306f overflow: hidden \u3067\u96a0\u3057\u3066\u304a\u304d\u3001width\u304c\u5e83\u304c\u308b\u306b\u3064\u308c\u3066\u5de6\u304b\u3089\u6587\u5b57\u304c\u898b\u3048\u3066\u304f\u308b\u3068\u3044\u3046\u539f\u7406\u3067\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u30dd\u30a4\u30f3\u30c8\u306f<strong><span class=\"swl-marker mark_yellow\">steps() \u30a4\u30fc\u30b8\u30f3\u30b0\u95a2\u6570<\/span><\/strong>\u3092\u4f7f\u3046\u3053\u3068\u3067\u3059\u3002\u901a\u5e38\u306e animation \u306f\u6ed1\u3089\u304b\u306b\u5909\u5316\u3057\u307e\u3059\u304c\u3001steps(N) \u3092\u4f7f\u3046\u3068 N \u6bb5\u968e\u306e\u30b9\u30c6\u30c3\u30d7\u72b6\u306e\u5909\u5316\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u300c1\u6587\u5b57\u305a\u3064\u3071\u3063\u3071\u3063\u3068\u73fe\u308c\u308b\u300d\u30bf\u30a4\u30d7\u30e9\u30a4\u30bf\u30fc\u611f\u304c\u751f\u307e\u308c\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">steps() \u306e\u52d5\u4f5c\u3092\u7406\u89e3\u3059\u308b<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u6ed1\u3089\u304b\u306b\u5e83\u304c\u308b\uff08\u30bf\u30a4\u30d4\u30f3\u30b0\u3063\u307d\u304f\u306a\u3044\uff09 *\/\n.smooth {\n  animation: expand 3s linear forwards;\n}\n\n\/* \u6bb5\u968e\u7684\u306b\u5e83\u304c\u308b\uff08\u30bf\u30a4\u30d4\u30f3\u30b0\u98a8\uff09 *\/\n.typewriter {\n  animation: expand 3s steps(20, end) forwards;\n  \/* steps(\u6587\u5b57\u6570, end) \u3068\u66f8\u304f *\/\n}\n\n@keyframes expand {\n  from { width: 0; }\n  to   { width: 20ch; } \/* 20\u6587\u5b57\u5206\u306e\u5e45 *\/\n}\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\">steps(20, end) \u306e 20 \u306f\u300c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u309220\u6bb5\u968e\u306b\u5206\u3051\u308b\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u304c20\u6587\u5b57\u306a\u3089 steps(20) \u3068\u66f8\u304f\u3053\u3068\u3067\u30011\u30b9\u30c6\u30c3\u30d7\u306b\u3064\u304d1\u6587\u5b57\u5206\u9032\u3080\u3088\u3046\u306b\u5408\u308f\u305b\u307e\u3059\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u57fa\u672c\u306e\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"19274-2\"><img decoding=\"async\" width=\"1568\" height=\"731\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-2.png\" alt=\"\u5b9f\u88c5\u306e4\u30b9\u30c6\u30c3\u30d7\" class=\"wp-image-19376\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-2.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-2-768x358.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-2-1536x716.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n<h3 class=\"wp-block-heading\">\u82f1\u6570\u5b571\u884c\u7248\uff08\u6700\u3082\u30b7\u30f3\u30d7\u30eb\uff09<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.typewriter {\n  font-family: monospace; \/* \u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u5fc5\u9808 *\/\n  white-space: nowrap;    \/* \u6298\u308a\u8fd4\u3057\u7981\u6b62 *\/\n  overflow: hidden;       \/* \u306f\u307f\u51fa\u3057\u975e\u8868\u793a *\/\n  width: 0;\n  animation: typing 3s steps(30, end) forwards;\n}\n\n@keyframes typing {\n  to {\n    width: 30ch; \/* \u30c6\u30ad\u30b9\u30c8\u306e\u6587\u5b57\u6570\u306b\u5408\u308f\u305b\u308b *\/\n  }\n}\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- \u300cHello, WithCode!\u300d\u306f15\u6587\u5b57 \u2192 steps(15)\u3001width: 15ch --&gt;\n&lt;p class=&quot;typewriter&quot; style=&quot;animation: typing 2s steps(15, end) forwards;&quot;&gt;\n  Hello, WithCode!\n&lt;\/p&gt;\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">ch \u5358\u4f4d\u306f\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u306e\u300c0\u300d1\u6587\u5b57\u5206\u306e\u5e45<\/span><\/strong>\u3092\u8868\u3057\u307e\u3059\u3002\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\uff08monospace\uff09\u3067\u306f\u5168\u6587\u5b57\u304c\u540c\u3058\u5e45\u306a\u306e\u3067\u3001\u300c\u6587\u5b57\u6570ch = \u30c6\u30ad\u30b9\u30c8\u306e\u5168\u5e45\u300d\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u30ab\u30fc\u30bd\u30eb\u70b9\u6ec5\u3092\u8ffd\u52a0\u3059\u308b<\/h3>\n<p class=\"wp-block-paragraph\">border-right \u3067\u30ab\u30fc\u30bd\u30eb\u3092\u7591\u4f3c\u7684\u306b\u8868\u73fe\u3057\u3001animation \u3067\u70b9\u6ec5\u3055\u305b\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.typewriter-cursor {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  border-right: 2px solid #333; \/* \u3053\u308c\u304c\u30ab\u30fc\u30bd\u30eb *\/\n  animation:\n    typing 3s steps(20, end) forwards,\n    blink 0.75s step-end infinite;\n}\n\n@keyframes typing {\n  to {\n    width: 20ch;\n  }\n}\n\n@keyframes blink {\n  0%, 100% { border-color: #333; }  \/* \u8868\u793a *\/\n  50%       { border-color: transparent; } \/* \u975e\u8868\u793a *\/\n}\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;h1 class=&quot;typewriter-cursor&quot;&gt;Welcome to WithCode&lt;\/h1&gt;\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\">blink \u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306b step-end \u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u6ed1\u3089\u304b\u306b\u30d5\u30a7\u30fc\u30c9\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u300c\u30d1\u30c3\u30fb\u30d1\u30c3\u300d\u3068\u30aa\u30f3\/\u30aa\u30d5\u304c\u5207\u308a\u66ff\u308f\u308b\u30ab\u30fc\u30bd\u30eb\u3089\u3057\u3044\u70b9\u6ec5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u30bf\u30a4\u30d4\u30f3\u30b0\u5b8c\u4e86\u5f8c\u306b\u30ab\u30fc\u30bd\u30eb\u3092\u6b62\u3081\u308b\u30fb\u6d88\u3059<\/h2>\n<p class=\"wp-block-paragraph\">\u30bf\u30a4\u30d4\u30f3\u30b0\u304c\u7d42\u308f\u3063\u305f\u5f8c\u3001\u30ab\u30fc\u30bd\u30eb\u3092\u70b9\u6ec5\u3055\u305b\u7d9a\u3051\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3057\u3001\u6570\u79d2\u5f8c\u306b\u6d88\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30bf\u30a4\u30d4\u30f3\u30b0\u5b8c\u4e86\u5f8c\u3082\u30ab\u30fc\u30bd\u30eb\u70b9\u6ec5\u3092\u7d9a\u3051\u308b *\/\n.typewriter-keep-cursor {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  border-right: 2px solid currentColor;\n  animation:\n    typing 3s steps(18, end) forwards,\n    blink 0.75s step-end infinite; \/* infinite \u3067\u6c38\u7d9a *\/\n}\n\n\/* \u30bf\u30a4\u30d4\u30f3\u30b0\u5b8c\u4e86\u5f8c\u306b\u30ab\u30fc\u30bd\u30eb\u3092\u6d88\u3059 *\/\n.typewriter-hide-cursor {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  border-right: 2px solid currentColor;\n  animation:\n    typing 3s steps(18, end) forwards,\n    blink 0.75s step-end 4, \/* 4\u56de\u3060\u3051\u70b9\u6ec5\uff08\u7d043\u79d2\uff09 *\/\n    hideCursor 0s 3.2s forwards; \/* \u30bf\u30a4\u30d4\u30f3\u30b0\u5f8c\u306b\u6d88\u3059 *\/\n}\n\n@keyframes hideCursor {\n  to {\n    border-color: transparent;\n  }\n}\n<\/code><\/pre>\n<\/div>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u30eb\u30fc\u30d7\uff08\u7e70\u308a\u8fd4\u3057\uff09\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/h2>\n<p class=\"wp-block-paragraph\">\u6587\u5b57\u304c\u6253\u3061\u8fbc\u307e\u308c\u3066\u304b\u3089\u6d88\u3048\u3066\u3001\u307e\u305f\u6253\u3061\u8fbc\u307e\u308c\u308b\u2026\u2026\u3068\u3044\u3046\u30eb\u30fc\u30d7\u3092\u4f5c\u308b\u306b\u306f\u3001@keyframes \u3067\u300c\u5e83\u304c\u308b \u2192 \u7e2e\u3080\u300d\u306e\u52d5\u304d\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.typewriter-loop {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  border-right: 2px solid #333;\n  width: 0;\n  animation:\n    typingLoop 4s steps(20, end) infinite,\n    blink 0.75s step-end infinite;\n}\n\n@keyframes typingLoop {\n  \/* 0\u301c40%\uff1a\u6587\u5b57\u3092\u6253\u3061\u8fbc\u3080 *\/\n  0%   { width: 0; }\n  40%  { width: 20ch; }\n  \/* 40\u301c60%\uff1a\u6253\u3061\u7d42\u308f\u3063\u305f\u72b6\u614b\u3067\u30ab\u30fc\u30bd\u30eb\u3092\u70b9\u6ec5\u3055\u305b\u3066\u5f85\u6a5f *\/\n  60%  { width: 20ch; }\n  \/* 60\u301c100%\uff1a\u6587\u5b57\u3092\u6d88\u3059 *\/\n  100% { width: 0; }\n}\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\">\u305f\u3060\u30571\u7a2e\u985e\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u30eb\u30fc\u30d7\u3055\u305b\u308b\u3060\u3051\u306a\u3089\u4e0a\u8a18\u3067\u5341\u5206\u3067\u3059\u304c\u3001<strong><span class=\"swl-marker mark_yellow\">\u8907\u6570\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u5207\u308a\u66ff\u3048\u3066\u30eb\u30fc\u30d7\u3055\u305b\u308b\u5834\u5408\u306f CSS \u3060\u3051\u3067\u306f\u56f0\u96e3<\/span><\/strong>\u3067\u3059\u3002\u5f8c\u8ff0\u306e JavaScript \u7248\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u8907\u6570\u884c\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/h2>\n<p class=\"wp-block-paragraph\">1\u884c\u76ee\u304c\u6253\u3061\u7d42\u308f\u3063\u305f\u30892\u884c\u76ee\u304c\u6253\u3061\u8fbc\u307e\u308c\u308b\u3001\u3068\u3044\u3046\u9806\u756a\u5236\u5fa1\u306f animation-delay \u3067\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.line1,\n.line2,\n.line3 {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  display: block; \/* \u5404\u884c\u3092\u30d6\u30ed\u30c3\u30af\u8981\u7d20\u306b *\/\n}\n\n\/* 1\u884c\u76ee\uff1a\u3059\u3050\u958b\u59cb\u300114\u6587\u5b57 *\/\n.line1 {\n  animation:\n    typeLine1 1.4s steps(14, end) forwards,\n    blink 0.75s step-end 3;\n  border-right: 2px solid #333;\n}\n\n\/* 2\u884c\u76ee\uff1a1\u884c\u76ee\u5b8c\u4e86\u5f8c\u306b\u958b\u59cb\uff081.5\u79d2\u5f8c\uff09\u300118\u6587\u5b57 *\/\n.line2 {\n  animation:\n    typeLine2 1.8s steps(18, end) 1.6s forwards,\n    blink 0.75s step-end 3;\n  animation-delay: 1.6s, 1.6s;\n  border-right: 2px solid #333;\n}\n\n\/* 3\u884c\u76ee\uff1a2\u884c\u76ee\u5b8c\u4e86\u5f8c\u306b\u958b\u59cb\uff083.5\u79d2\u5f8c\uff09\u300112\u6587\u5b57 *\/\n.line3 {\n  animation:\n    typeLine3 1.2s steps(12, end) 3.6s forwards,\n    blink 0.75s step-end infinite;\n  animation-delay: 3.6s, 3.6s;\n  border-right: 2px solid #333;\n}\n\n@keyframes typeLine1 { to { width: 14ch; } }\n@keyframes typeLine2 { to { width: 18ch; } }\n@keyframes typeLine3 { to { width: 12ch; } }\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;div class=&quot;terminal&quot;&gt;\n  &lt;span class=&quot;line1&quot;&gt;$ npm install&lt;\/span&gt;\n  &lt;span class=&quot;line2&quot;&gt;Installing packages...&lt;\/span&gt;\n  &lt;span class=&quot;line3&quot;&gt;Done! 12 added&lt;\/span&gt;\n&lt;\/div&gt;\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u30bf\u30fc\u30df\u30ca\u30eb\u98a8\u306e\u30b9\u30bf\u30a4\u30eb\u3068\u7d44\u307f\u5408\u308f\u305b\u308b<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.terminal {\n  background: #1a1a2e;\n  color: #00ff41;\n  padding: 24px 28px;\n  border-radius: 8px;\n  font-family: 'Courier New', Courier, monospace;\n  font-size: 1rem;\n  line-height: 2;\n  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);\n}\n\n.terminal::before {\n  content: '';\n  display: block;\n  width: 12px;\n  height: 12px;\n  border-radius: 50%;\n  background: #ff5f56;\n  box-shadow: 20px 0 0 #ffbd2e, 40px 0 0 #27c93f;\n  margin-bottom: 16px;\n}\n<\/code><\/pre>\n<\/div>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u65e5\u672c\u8a9e\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u6ce8\u610f\u70b9<\/h2>\n<p class=\"wp-block-paragraph\">\u65e5\u672c\u8a9e\u30c6\u30ad\u30b9\u30c8\u306b\u5bfe\u3057\u3066CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3046\u5834\u5408\u3001\u82f1\u6570\u5b57\u306e\u3068\u304d\u3068\u306f\u7570\u306a\u308b\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">ch \u5358\u4f4d\u306f\u65e5\u672c\u8a9e\u3067\u306f\u4f7f\u3048\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">ch \u5358\u4f4d\u306f\u300c0\uff08\u30bc\u30ed\uff09\u306e\u5e45\u300d\u3092\u57fa\u6e96\u306b\u3059\u308b\u305f\u3081\u3001\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u306e\u82f1\u6570\u5b57\u3067\u306f\u300c1\u6587\u5b57 = 1ch\u300d\u304c\u6210\u7acb\u3057\u307e\u3059\u3002\u3057\u304b\u3057<strong><span class=\"swl-marker mark_yellow\">\u65e5\u672c\u8a9e\u306e\u5168\u89d2\u6587\u5b57\u306f\u901a\u5e38 2ch \u5206\u306e\u5e45<\/span><\/strong>\u306b\u306a\u308b\u305f\u3081\u3001steps \u306e\u6570\u3068\u5e45\u304c\u5408\u3044\u307e\u305b\u3093\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u65e5\u672c\u8a9e\uff1aem \u5358\u4f4d\u3092\u4f7f\u3046\u65b9\u6cd5 *\/\n.typewriter-ja {\n  font-family: monospace;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  \/* \u65e5\u672c\u8a9e10\u6587\u5b57\u306a\u3089 10em\uff08\u76ee\u5b89\uff09 *\/\n  animation: typingJa 3s steps(10, end) forwards;\n}\n\n@keyframes typingJa {\n  to {\n    width: 10em; \/* \u6587\u5b57\u6570 \u00d7 em \u3067\u6307\u5b9a *\/\n  }\n}\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057em\u5358\u4f4d\u3082\u30d5\u30a9\u30f3\u30c8\u306b\u3088\u3063\u3066\u5909\u308f\u308b\u305f\u3081\u3001\u5b8c\u5168\u306b\u6b63\u78ba\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6700\u3082\u78ba\u5b9f\u306a\u306e\u306f\u3001\u5b9f\u969b\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u8868\u793a\u3057\u305f\u72b6\u614b\u306e\u5e45\u3092\u30d6\u30e9\u30a6\u30b6\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u6e2c\u5b9a\u3057\u3001px \u5358\u4f4d\u3067\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* px \u5358\u4f4d\u3067\u78ba\u5b9f\u306b\u6307\u5b9a\u3059\u308b\u65b9\u6cd5 *\/\n.typewriter-ja-px {\n  font-size: 1.5rem;\n  font-family: 'Hiragino Kaku Gothic Pro', 'Meiryo', sans-serif;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  \/* \u5b9f\u969b\u306e\u5e45\u3092\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3067\u8a08\u6e2c\u3057\u3066\u6307\u5b9a *\/\n  animation: typingJaPx 3s steps(10, end) forwards;\n}\n\n@keyframes typingJaPx {\n  to {\n    width: 240px; \/* \u5b9f\u6e2c\u5024\u3092\u5165\u308c\u308b *\/\n  }\n}\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u65e5\u672c\u8a9e\u3067\u30d7\u30ed\u30dd\u30fc\u30b7\u30e7\u30ca\u30eb\u30d5\u30a9\u30f3\u30c8\u3092\u4f7f\u3046\u5834\u5408<\/h3>\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30dd\u30fc\u30b7\u30e7\u30ca\u30eb\u30d5\u30a9\u30f3\u30c8\uff08\u6587\u5b57\u3054\u3068\u306b\u5e45\u304c\u7570\u306a\u308b\u30d5\u30a9\u30f3\u30c8\uff09\u3067\u306f\u30011\u6587\u5b57\u305a\u3064\u3074\u3063\u305f\u308a\u5e83\u304c\u308b\u30bf\u30a4\u30d4\u30f3\u30b0\u52b9\u679c\u306fCSS\u3060\u3051\u3067\u306f\u5b9f\u73fe\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u5834\u5408\u306f\u5f8c\u8ff0\u306eJavaScript\u7248\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">CSS\u306e\u9650\u754c\u3068JavaScript1\u884c\u3067\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"19274-3\"><img decoding=\"async\" width=\"1568\" height=\"554\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-3.png\" alt=\"CSS\u306e\u307f \u3068 JS\u4f75\u7528\" class=\"wp-image-19377\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-3.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-3-768x271.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-3-1536x543.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u4ee5\u4e0b\u306e\u9650\u754c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th>\u6a5f\u80fd<\/th>\n<th>CSS<\/th>\n<th>JavaScript<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1\u7a2e\u985e\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u8868\u793a<\/td>\n<td>\u53ef\u80fd<\/td>\n<td>\u53ef\u80fd<\/td>\n<\/tr>\n<tr>\n<td>\u8907\u6570\u30c6\u30ad\u30b9\u30c8\u3092\u9806\u756a\u306b\u5207\u308a\u66ff\u3048<\/td>\n<td>\u56f0\u96e3\uff08\u9577\u3044@keyframes\u304c\u5fc5\u8981\uff09<\/td>\n<td>\u7c21\u5358<\/td>\n<\/tr>\n<tr>\n<td>\u30d7\u30ed\u30dd\u30fc\u30b7\u30e7\u30ca\u30eb\u30d5\u30a9\u30f3\u30c8\u5bfe\u5fdc<\/td>\n<td>\u4e0d\u53ef<\/td>\n<td>\u53ef\u80fd<\/td>\n<\/tr>\n<tr>\n<td>\u65e5\u672c\u8a9e\u3092\u6b63\u78ba\u306b1\u6587\u5b57\u305a\u3064<\/td>\n<td>\u56f0\u96e3<\/td>\n<td>\u53ef\u80fd<\/td>\n<\/tr>\n<tr>\n<td>\u52d5\u7684\u306a\u30c6\u30ad\u30b9\u30c8\uff08API\u304b\u3089\u53d6\u5f97\u306a\u3069\uff09<\/td>\n<td>\u4e0d\u53ef<\/td>\n<td>\u53ef\u80fd<\/td>\n<\/tr>\n<tr>\n<td>\u30eb\u30fc\u30d7\u4e2d\u306e\u30c6\u30ad\u30b9\u30c8\u5909\u66f4<\/td>\n<td>\u4e0d\u53ef<\/td>\n<td>\u53ef\u80fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h3 class=\"wp-block-heading\">JavaScript\u7248\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\uff08\u30b7\u30f3\u30d7\u30eb\u5b9f\u88c5\uff09<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ 1\u7a2e\u985e\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u30bf\u30a4\u30d4\u30f3\u30b0\u8868\u793a\nfunction typewriter(element, text, speed = 80) {\n  let i = 0;\n  element.textContent = '';\n  const timer = setInterval(() => {\n    if (i &lt; text.length) {\n      element.textContent += text.charAt(i);\n      i++;\n    } else {\n      clearInterval(timer);\n    }\n  }, speed);\n}\n\n\/\/ \u4f7f\u3044\u65b9\nconst el = document.querySelector('.typewriter-js');\ntypewriter(el, 'CSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3', 100);\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u8907\u6570\u30c6\u30ad\u30b9\u30c8\u3092\u30eb\u30fc\u30d7\u3059\u308bJavaScript\u7248<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ \u8907\u6570\u30c6\u30ad\u30b9\u30c8\u3092\u9806\u756a\u306b\u30bf\u30a4\u30d4\u30f3\u30b0\u2192\u524a\u9664\u2192\u6b21\u306e\u30c6\u30ad\u30b9\u30c8\nfunction multiTypewriter(element, texts, {\n  typeSpeed = 80,\n  deleteSpeed = 40,\n  pauseAfterType = 1500,\n  pauseAfterDelete = 400\n} = {}) {\n  let textIndex = 0;\n  let charIndex = 0;\n  let isDeleting = false;\n\n  function tick() {\n    const currentText = texts[textIndex];\n\n    if (!isDeleting) {\n      \/\/ \u30bf\u30a4\u30d4\u30f3\u30b0\u4e2d\n      element.textContent = currentText.substring(0, charIndex + 1);\n      charIndex++;\n\n      if (charIndex === currentText.length) {\n        \/\/ \u6253\u3061\u7d42\u308f\u308a \u2192 \u5f85\u6a5f\u3057\u3066\u304b\u3089\u524a\u9664\u958b\u59cb\n        isDeleting = true;\n        setTimeout(tick, pauseAfterType);\n        return;\n      }\n      setTimeout(tick, typeSpeed);\n    } else {\n      \/\/ \u524a\u9664\u4e2d\n      element.textContent = currentText.substring(0, charIndex - 1);\n      charIndex--;\n\n      if (charIndex === 0) {\n        \/\/ \u524a\u9664\u5b8c\u4e86 \u2192 \u6b21\u306e\u30c6\u30ad\u30b9\u30c8\u3078\n        isDeleting = false;\n        textIndex = (textIndex + 1) % texts.length;\n        setTimeout(tick, pauseAfterDelete);\n        return;\n      }\n      setTimeout(tick, deleteSpeed);\n    }\n  }\n\n  tick();\n}\n\n\/\/ \u4f7f\u3044\u65b9\nconst el = document.querySelector('.multi-typewriter');\nmultiTypewriter(el, [\n  'Web\u30b5\u30a4\u30c8\u3092\u4f5c\u308d\u3046',\n  '\u30c7\u30b6\u30a4\u30f3\u3092\u78e8\u3053\u3046',\n  'CSS\u3092\u5b66\u307c\u3046'\n]);\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* JS\u7248\u306e\u30ab\u30fc\u30bd\u30eb\u30b9\u30bf\u30a4\u30eb *\/\n.multi-typewriter {\n  display: inline-block;\n  border-right: 2px solid currentColor;\n  padding-right: 2px;\n  animation: blink 0.75s step-end infinite;\n  min-height: 1.5em; \/* \u30c6\u30ad\u30b9\u30c8\u304c\u6d88\u3048\u305f\u3068\u304d\u306e\u9ad8\u3055\u78ba\u4fdd *\/\n}\n\n@keyframes blink {\n  0%, 100% { border-color: currentColor; }\n  50%       { border-color: transparent; }\n}\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/withcode.tech\/media\/css-keyframes-animation\/\">CSS @keyframes\u306e\u57fa\u790e<\/a>\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067JavaScript\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u67d4\u8edf\u3067\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3057\u3084\u3059\u3044\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u66f8\u3051\u307e\u3059\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30b6\u30a4\u30f3\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3<\/h2>\n<h3 class=\"wp-block-heading\">\u30b0\u30ea\u30fc\u30f3\u30bf\u30fc\u30df\u30ca\u30eb\u98a8<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.terminal-green {\n  background: #0d1117;\n  color: #39d353;\n  font-family: 'Courier New', monospace;\n  font-size: 1.1rem;\n  padding: 20px 24px;\n  border-radius: 6px;\n  display: inline-block;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  border-right: 2px solid #39d353;\n  animation:\n    typing 2.5s steps(20, end) forwards,\n    blink 0.6s step-end infinite;\n}\n\n@keyframes typing {\n  to { width: 20ch; }\n}\n\n@keyframes blink {\n  50% { border-color: transparent; }\n}\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u30db\u30ef\u30a4\u30c8\u80cc\u666f\u30fb\u30df\u30cb\u30de\u30eb\u7248<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.typewriter-minimal {\n  font-family: 'Georgia', serif;\n  font-size: 2rem;\n  color: #1a1a1a;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  border-right: 3px solid #d16176;\n  padding-right: 4px;\n  animation:\n    typing 3s steps(16, end) forwards,\n    blink 0.8s step-end infinite;\n}\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u30bf\u30a4\u30d7\u30e9\u30a4\u30bf\u30fc\u5f8c\u306b\u4e0b\u7dda\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.typewriter-underline {\n  position: relative;\n  display: inline-block;\n  white-space: nowrap;\n  overflow: hidden;\n  width: 0;\n  font-family: monospace;\n  animation: typing 2s steps(14, end) forwards;\n}\n\n.typewriter-underline::after {\n  content: '';\n  position: absolute;\n  bottom: -4px;\n  left: 0;\n  width: 100%;\n  height: 3px;\n  background: #d16176;\n  transform: scaleX(0);\n  transform-origin: left;\n  animation: underlineIn 0.4s ease 2.1s forwards; \/* \u30bf\u30a4\u30d4\u30f3\u30b0\u5b8c\u4e86\u5f8c\u306b\u767a\u706b *\/\n}\n\n@keyframes underlineIn {\n  to { transform: scaleX(1); }\n}\n<\/code><\/pre>\n<\/div>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u5931\u6557\u3068\u5bfe\u51e6\u6cd5<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"19274-4\"><img decoding=\"async\" width=\"1568\" height=\"669\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-4.png\" alt=\"\u3064\u307e\u305a\u304d\u2192\u5bfe\u51e6\" class=\"wp-image-19378\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-4.png 1568w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-4-768x328.png 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/dia-19274-4-1536x655.png 1536w\" sizes=\"(max-width: 1568px) 100vw, 1568px\" \/><\/figure>\n<h3 class=\"wp-block-heading\">\u5931\u65571\uff1asteps \u306e\u6570\u3068\u6587\u5b57\u6570\u304c\u5408\u308f\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">steps(N) \u306e N \u306f\u30c6\u30ad\u30b9\u30c8\u306e\u6587\u5b57\u6570\u306b\u4e00\u81f4\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305a\u308c\u308b\u3068\u3001\u6700\u5f8c\u306e\u6570\u6587\u5b57\u304c\u4e00\u77ac\u3067\u8868\u793a\u3055\u308c\u305f\u308a\u3001\u624b\u524d\u3067\u6b62\u307e\u3063\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30c6\u30ad\u30b9\u30c8\u300cHello World\u300d= 11\u6587\u5b57\uff08\u30b9\u30da\u30fc\u30b9\u542b\u3080\uff09 *\/\n\n\/* NG\uff1a\u6587\u5b57\u6570\u3068 steps \u304c\u5408\u3063\u3066\u3044\u306a\u3044 *\/\n.bad { animation: typing 2s steps(10, end) forwards; }\n\/* NG\uff1awidth\u3082\u5408\u3063\u3066\u3044\u306a\u3044 *\/\n@keyframes typing { to { width: 9ch; } } \/* 10\u6587\u5b57\u5206\u3057\u304b\u306a\u3044 *\/\n\n\/* OK\uff1a\u6587\u5b57\u6570\u306b\u5408\u308f\u305b\u308b *\/\n.good { animation: typing 2s steps(11, end) forwards; }\n@keyframes typing { to { width: 11ch; } }\n<\/code><\/pre>\n<\/div>\n<h3 class=\"wp-block-heading\">\u5931\u65572\uff1awidth: fit-content \u3067\u4f7f\u3048\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">width: fit-content \u306f\u56fa\u5b9a\u5024\u3067\u306f\u306a\u3044\u305f\u3081\u3001@keyframes \u306e to \u3067\u4f7f\u3046\u3068\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3002\u5fc5\u305a\u56fa\u5b9a\u306e\u9577\u3055\uff08ch, em, px\uff09\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u5931\u65573\uff1ainline \u8981\u7d20\u3067width\u304c\u52b9\u304b\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">span \u306a\u3069 inline \u8981\u7d20\u3067\u306f width \u304c\u52b9\u304d\u307e\u305b\u3093\u3002display: inline-block \u304b display: block \u306b\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* NG *\/\nspan.typewriter {\n  width: 0; \/* inline\u8981\u7d20\u306bwidth\u306f\u52b9\u304b\u306a\u3044 *\/\n  overflow: hidden;\n}\n\n\/* OK *\/\nspan.typewriter {\n  display: inline-block; \/* \u307e\u305f\u306f block *\/\n  width: 0;\n  overflow: hidden;\n}\n<\/code><\/pre>\n<\/div>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\">\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\uff1aprefers-reduced-motion \u5bfe\u5fdc<\/h2>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>@media (prefers-reduced-motion: reduce) {\n  .typewriter,\n  .typewriter-cursor,\n  .typewriter-loop {\n    animation: none;\n    width: auto;     \/* \u30c6\u30ad\u30b9\u30c8\u3092\u3059\u3079\u3066\u8868\u793a *\/\n    overflow: visible;\n    border-right: none;\n  }\n}\n<\/code><\/pre>\n<\/div>\n<p class=\"wp-block-paragraph\">reduced-motion \u74b0\u5883\u3067\u306f width: 0 + overflow: hidden \u306e\u307e\u307e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u6b62\u3081\u3066\u3057\u307e\u3046\u3068\u3001\u30c6\u30ad\u30b9\u30c8\u304c\u898b\u3048\u306a\u3044\u72b6\u614b\u306e\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">\u5fc5\u305a width: auto \u3068 overflow: visible \u3092\u8a2d\u5b9a<\/span><\/strong>\u3057\u3066\u30c6\u30ad\u30b9\u30c8\u304c\u8aad\u3081\u308b\u72b6\u614b\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<p><!-- roam:retrofit18209-matome --><\/p>\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n<p class=\"wp-block-paragraph\">\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u3001steps()\u3067width\u3092\u6bb5\u968e\u7684\u306b\u5e83\u3052\u3001border-right\u3067\u30ab\u30fc\u30bd\u30eb\u3092\u8868\u73fe\u3059\u308b\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u30dd\u30a4\u30f3\u30c8\u306f\u2460\u6587\u5b57\u6570\u306b\u5408\u308f\u305b\u3066width\u3068steps()\u306e\u6570\u3092\u5408\u308f\u305b\u308b\u2461\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u3067\u6587\u5b57\u30ba\u30ec\u3092\u9632\u3050\u2462\u30ab\u30fc\u30bd\u30eb\u70b9\u6ec5\u306f\u5225\u306e@keyframes\u3067\u4f5c\u308b\u3001\u306e3\u70b9\u3002\u8907\u6570\u884c\u3084JavaScript\u4f75\u7528\u306e\u5fdc\u7528\u3082\u7d39\u4ecb\u3057\u305f\u306e\u3067\u3001\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><!-- withmedia-faq --><\/p>\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n<h3 class=\"wp-block-heading\">CSS\u3060\u3051\u3067\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u308b\u5834\u5408\u3001\u3069\u3093\u306a\u30d5\u30a9\u30f3\u30c8\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\uff08monospace\uff09\u3092\u4f7f\u3046\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u3067\u306f\u5168\u6587\u5b57\u304c\u540c\u3058\u5e45\u306a\u306e\u3067\u300cN\u6587\u5b57 = Nch\u300d\u304c\u6b63\u78ba\u306b\u6210\u7acb\u3057\u3001steps() \u3068 width: Nch \u306e\u8a08\u7b97\u304c\u7c21\u5358\u306b\u306a\u308a\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u7b49\u5e45\u30d5\u30a9\u30f3\u30c8\u306f Courier New\u3001Consolas\u3001&#8217;Source Code Pro&#8217;\u3001&#8217;Fira Code&#8217; \u306a\u3069\u3067\u3059\u3002\u30d7\u30ed\u30dd\u30fc\u30b7\u30e7\u30ca\u30eb\u30d5\u30a9\u30f3\u30c8\uff08\u30d2\u30e9\u30ae\u30ce\u89d2\u30b4\u306a\u3069\uff09\u3067\u3069\u3046\u3057\u3066\u3082\u30bf\u30a4\u30d4\u30f3\u30b0\u98a8\u3092\u5b9f\u73fe\u3057\u305f\u3044\u5834\u5408\u306f JavaScript \u7248\u3092\u4f7f\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u6587\u5b57\u6570\u304c\u5206\u304b\u3089\u306a\u3044\u52d5\u7684\u30c6\u30ad\u30b9\u30c8\u306bCSS\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3048\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\">CSS\u306e\u307f\u3067\u306f\u56f0\u96e3\u3067\u3059\u3002steps() \u306e\u6570\u5024\u3068 width \u306e\u5024\u3092\u3042\u3089\u304b\u3058\u3081\u56fa\u5b9a\u3067\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u52d5\u7684\u306a\u30c6\u30ad\u30b9\u30c8\u3078\u306e\u5bfe\u5fdc\u306fJavaScript\u304c\u5fc5\u8981\u3067\u3059\u3002JavaScript\u3067\u30c6\u30ad\u30b9\u30c8\u306e\u6587\u5b57\u6570\u3092\u53d6\u5f97\u3057\u3066 steps \u3068 width \u3092\u52d5\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u304b\u3001\u672c\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305fJavaScript\u30bf\u30a4\u30d4\u30f3\u30b0\u95a2\u6570\u3092\u4f7f\u3046\u65b9\u6cd5\u3092\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u30bf\u30a4\u30d4\u30f3\u30b0\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u7279\u5b9a\u306e\u30da\u30fc\u30b8\u8981\u7d20\u304c\u8868\u793a\u3055\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u958b\u59cb\u3057\u305f\u3044<\/h3>\n<p class=\"wp-block-paragraph\">Intersection Observer API 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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\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" width=\"1254\" height=\"1254\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner.jpg\" alt=\"\u4eca\u306a\u3089\u5b8c\u5168\u7121\u6599\u3067AI\u3092\u5b66\u3079\u308b\uff01WithAI\" class=\"wp-image-18841\" 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 class=\"swl-marker mark_yellow\">0\u5186\u3067AI\u30b9\u30ad\u30eb\u304c\u8eab\u306b\u3064\u304f<\/span><\/li>\n<\/ul>\n<p>\u76ee\u7684\u306b\u5408\u308f\u305b\u3066\u9078\u3079\u308b\u300cAI\u526f\u696d\u300d\u300cAI\u8ee2\u8077\u300d\u300cAI\u6d3b\u7528\u300d\u306e3\u30b3\u30fc\u30b9\u3092\u7528\u610f\u3002\u526f\u53ce\u5165\u30fb\u30ad\u30e3\u30ea\u30a2\u30c1\u30a7\u30f3\u30b8\u30fb\u65e5\u5e38\u306e\u751f\u7523\u6027\u30a2\u30c3\u30d7\u307e\u3067\u3001\u3042\u306a\u305f\u306e\u30b4\u30fc\u30eb\u306b\u5408\u308f\u305b\u3066AI\u3092\u5b66\u3079\u307e\u3059\u3002<\/p>\n<p>\u4f1a\u54e1\u767b\u9332\u306f\u30ab\u30f3\u30bf\u30f330\u79d2\u3067\u5b8c\u4e86\u3057\u307e\u3059\u3002\u307e\u305a\u306f\u516c\u5f0fLINE\u304b\u3089\u3001\u7121\u6599\u3067AI\u5b66\u7fd2\u3092\u30b9\u30bf\u30fc\u30c8\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n<div class=\"wp-block-buttons\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" 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