{"id":11565,"date":"2025-10-20T08:00:18","date_gmt":"2025-10-20T08:00:18","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=11565"},"modified":"2026-08-17T14:41:31","modified_gmt":"2026-08-17T14:41:31","slug":"parallax-effect","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/parallax-effect\/","title":{"rendered":"\u30102026\u5e74\u6700\u65b0\u3011\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u5b8c\u5168\u30ac\u30a4\u30c9\uff5cHTML\u30fbCSS\u3067\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u521d\u5fc3\u8005\u3067\u3082\u4f5c\u308c\u308b\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"<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\" loading=\"lazy\" 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=\"\u751f\u5f92\u30a2\u30a4\u30b3\u30f3\" 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>\u30da\u30f3\u535a\u58eb\uff01Web\u30b5\u30a4\u30c8\u306b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306e\u30b9\u30af\u30ed\u30fc\u30ebEffect\u3092\u5165\u308c\u3066\u307f\u305f\u3044\u3093\u3067\u3059\u304c\u3001HTML\u3084CSS\u3067\u3069\u3046\u66f8\u3051\u3070\u3044\u3044\u304b\u5168\u7136\u308f\u304b\u3089\u306a\u304f\u3066\u56f0\u3063\u3066\u3044\u307e\u3059\u2026\u2026\u3002<\/strong><\/p>\n<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\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\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\u30da\u30f3\u535a\u58eb\u30a2\u30a4\u30b3\u30f3\" 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>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3058\u3083\u306a\uff01\u4ed5\u7d44\u307f\u3055\u3048\u7406\u89e3\u3059\u308c\u3070\u3001\u521d\u5fc3\u8005\u3067\u3082\u3059\u3050\u306b\u4f5c\u308c\u308b\u305e\uff01CSS\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u308b\u65b9\u6cd5\u3082\u3042\u308b\u304b\u3089\u3001\u3057\u3063\u304b\u308a\u899a\u3048\u3066\u3044\u304f\u3093\u3058\u3083\u305e\uff01<\/strong><\/p>\n<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\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\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\u751f\u5f92\u30a2\u30a4\u30b3\u30f3\" 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>CSS\u3060\u3051\u3067\u3067\u304d\u308b\u3093\u3067\u3059\u306d\uff01\u305c\u3072\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff01<\/strong><\/p>\n<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\n<p class=\"wp-block-paragraph\">\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u5408\u308f\u305b\u3066\u80cc\u666f\u304c\u3086\u3063\u304f\u308a\u52d5\u304f\u300c\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u300d\u3001\u304a\u3057\u3083\u308c\u306aWeb\u30b5\u30a4\u30c8\u3067\u3088\u304f\u898b\u304b\u3051\u308b\u3051\u308c\u3069\u3001<strong>HTML\u3084CSS\u3067\u3069\u3046\u3084\u3063\u3066\u5b9f\u88c5\u3059\u308b\u306e\u304b\u308f\u304b\u3089\u306a\u3044\u2026<\/strong>\u3068\u60a9\u3093\u3067\u3044\u307e\u305b\u3093\u304b\uff1f<\/p>\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u3001\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306fCSS\u306e\u6570\u884c\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<strong>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u304b\u3089\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b\u3001\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u30fbJavaScript\u3092\u4f7f\u3063\u305f\u5fdc\u7528\u65b9\u6cd5<\/strong>\u307e\u3067\u3001\u521d\u5fc3\u8005\u3067\u3082\u8ff7\u308f\u305a\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u30b9\u30c6\u30c3\u30d7\u3054\u3068\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n<p class=\"is-style-icon_announce wp-block-paragraph\">\u300c\u5b66\u7fd2\u2192\u6848\u4ef6\u7372\u5f97\u300d\u306b\u3064\u306a\u3052\u305f\u53d7\u8b1b\u751f\u306e\u30ea\u30a2\u30eb\u306a\u4f53\u9a13\u8ac7\u3082\u516c\u958b\u4e2d\uff01\u50cd\u304d\u65b9\u3092\u5909\u3048\u305f\u3044\u65b9\u306b\u3082\u97ff\u304f\u30b9\u30c8\u30fc\u30ea\u30fc\u3067\u3059\u3002<\/p>\n\n<p class=\"is-style-icon_info wp-block-paragraph\"><strong>\u7247\u5c71\u3055\u3093<\/strong><br>\n\u598a\u5a20\u3092\u304d\u3063\u304b\u3051\u306b\u3001\u5b50\u3069\u3082\u306e\u305f\u3081\u306b\u3069\u3053\u3067\u3082\u50cd\u3051\u308b\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u4ed8\u3051\u305f\u3044\u3068\u8003\u3048\u308b\u3002\u30aa\u30f3\u30e9\u30a4\u30f3\u30b9\u30af\u30fc\u30eb\u306efamm\u30671\u30f6\u6708\u9593Web\u5236\u4f5c\u3092\u5b66\u3073\u3001\u305d\u306e\u5f8c\u72ec\u5b66\u3067\u52b1\u3080\u3082\u9650\u754c\u3092\u611f\u3058\u3001\u6848\u4ef6\u4fdd\u8a3c\u304c\u9b45\u529b\u306eWithCode\u3078\u5165\u5b66\u3002\u7a3c\u3052\u308b\u529b\u3092\u8eab\u306b\u4ed8\u3051\u3001\u73fe\u5728\u306f\u526f\u696d\u3068\u3057\u306610\u4ef6\u4ee5\u4e0a\u306e\u6848\u4ef6\u3092\u62c5\u5f53\u3059\u308b\u307e\u3067\u306b\u6210\u9577\u3057\u305f\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u8a73\u3057\u304f\u306f<a href=\"https:\/\/withcode.tech\/media\/interview-7\/\" title=\"\u7247\u5c71\u3055\u3093\u306e\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc\u8a18\u4e8b\">\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-withcode-media wp-block-embed-withcode-media\">\n<div class=\"wp-block-embed__wrapper\">\nhttps:\/\/withcode.tech\/media\/interview-7\/\n<\/div>\n<\/figure>\n\n<!-- \u76ee\u6b21\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3 -->\n<div class=\"toc-box\" style=\"background:#f8f8f8;border-left:4px solid #4a90e2;padding:20px 24px;margin:32px 0;border-radius:4px;\">\n<p style=\"font-weight:bold;margin-bottom:12px;\">\ud83d\udccb \u3053\u306e\u8a18\u4e8b\u3067\u308f\u304b\u308b\u3053\u3068<\/p>\n<ul style=\"margin:0;padding-left:20px;\">\n<li>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3068\u306f\u4f55\u304b\u30fb\u3069\u3093\u306a\u30b5\u30a4\u30c8\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b<\/li>\n<li>CSS\u3060\u3051\u3067\u5b9f\u88c5\u3059\u308bbackground-attachment\u306e\u4f7f\u3044\u65b9<\/li>\n<li>JavaScript\u3092\u4f7f\u3063\u305f\u3088\u308a\u6ed1\u3089\u304b\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306e\u4f5c\u308a\u65b9<\/li>\n<li>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u30fb\u30b9\u30de\u30db\u3067\u306e\u6ce8\u610f\u70b9<\/li>\n<li>\u3088\u304f\u3042\u308b\u5b9f\u88c5\u30df\u30b9\u3068\u305d\u306e\u89e3\u6c7a\u7b56<\/li>\n<\/ul>\n<\/div>\n\n<h2>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3068\u306f\uff1f\u57fa\u672c\u306e\u4ed5\u7d44\u307f\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/h2>\n<!-- withmedia-diagram -->\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-1_parallax_mechanism.png\" alt=\"\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306f\u80cc\u666f\u3068\u524d\u666f\u306e\u901f\u5ea6\u5dee\u3067\u5965\u884c\u304d\u3092\u751f\u3080\u4ed5\u7d44\u307f\u306e\u56f3\u89e3\" class=\"wp-image-16721\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-1_parallax_mechanism.png 1200w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-1_parallax_mechanism-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n<p class=\"wp-block-paragraph\"><strong>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\uff08Parallax\uff09<\/strong>\u3068\u306f\u3001\u8996\u5dee\uff08\u8996\u70b9\u306e\u4f4d\u7f6e\u306b\u3088\u3063\u3066\u898b\u3048\u65b9\u304c\u5909\u308f\u308b\u73fe\u8c61\uff09\u3092\u610f\u5473\u3059\u308b\u8a00\u8449\u3067\u3059\u3002Web\u30c7\u30b6\u30a4\u30f3\u306b\u304a\u3051\u308b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3068\u306f\u3001<strong>\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u305f\u3068\u304d\u306b\u80cc\u666f\u3068\u524d\u666f\u304c\u7570\u306a\u308b\u901f\u5ea6\u3067\u52d5\u304f\u3053\u3068\u3067\u3001\u5965\u884c\u304d\u3084\u7acb\u4f53\u611f\u3092\u6f14\u51fa\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/strong>\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u305f\u3068\u3048\u3070\u3001\u30da\u30fc\u30b8\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u305f\u3068\u304d\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u901a\u5e38\u306e\u901f\u3055\u3067\u6d41\u308c\u3066\u3044\u304f\u4e00\u65b9\u3001\u80cc\u666f\u753b\u50cf\u306f\u3086\u3063\u304f\u308a\u3068\u52d5\u304f\u2014\u2014\u3053\u306e\u30ba\u30ec\u304c\u300c\u8996\u5dee\u300d\u3092\u751f\u307f\u51fa\u3057\u3001\u8996\u899a\u7684\u306a\u30c0\u30a4\u30ca\u30df\u30ba\u30e0\u3068\u6ca1\u5165\u611f\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n\n<h3>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u304c\u4f7f\u308f\u308c\u308b\u4e3b\u306a\u30b7\u30fc\u30f3<\/h3>\n<ul>\n<li>\u4f01\u696d\u30fb\u30d6\u30e9\u30f3\u30c9\u306e\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30da\u30fc\u30b8\uff08LP\uff09<\/li>\n<li>\u30dd\u30fc\u30c8\u30d5\u30a9\u30ea\u30aa\u30b5\u30a4\u30c8\u30fb\u30af\u30ea\u30a8\u30a4\u30bf\u30fc\u306e\u4f5c\u54c1\u7d39\u4ecb\u30da\u30fc\u30b8<\/li>\n<li>\u89b3\u5149\u30fb\u65c5\u884c\u30fb\u98f2\u98df\u5e97\u306e\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\u30b5\u30a4\u30c8<\/li>\n<li>\u30b2\u30fc\u30e0\u3084\u6620\u753b\u306a\u3069\u306e\u30c6\u30a3\u30b6\u30fc\u30b5\u30a4\u30c8<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">\u8996\u899a\u7684\u306a\u30a4\u30f3\u30d1\u30af\u30c8\u304c\u5927\u304d\u3044\u305f\u3081\u3001<strong>\u30e6\u30fc\u30b6\u30fc\u306e\u6ede\u5728\u6642\u9593\u5411\u4e0a\u3084\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306e\u5f37\u5316<\/strong>\u306b\u3082\u52b9\u679c\u7684\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n<!-- roam:v1 -->\n<p class=\"wp-block-paragraph\">\u30b9\u30af\u30ed\u30fc\u30eb\u6f14\u51fa\u3092\u3055\u3089\u306b\u5e83\u3052\u305f\u3044\u5834\u5408\u306f\u3001<a href=\"https:\/\/withcode.tech\/media\/css-keyframes-animation\/\">@keyframes\u306b\u3088\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/a>\u3084<a href=\"https:\/\/withcode.tech\/media\/css-fadein-scroll\/\">\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u3075\u308f\u3063\u3068\u8868\u793a\u3059\u308b\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3<\/a>\u3082\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u8868\u73fe\u306e\u5e45\u304c\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n<h2>\u3010\u6700\u3082\u7c21\u5358\u3011CSS\u306ebackground-attachment\u3067\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3092\u5b9f\u88c5\u3059\u308b\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u65b9\u6cd5\u306f\u3001CSS\u306e<code>background-attachment: fixed;<\/code>\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3046\u65b9\u6cd5\u3067\u3059\u3002JavaScript\u3092\u4e00\u5207\u4f7f\u308f\u305a\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h3>\u57fa\u672c\u306eHTML\u69cb\u9020<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30bb\u30af\u30b7\u30e7\u30f3 --&gt;\n&lt;section class=\"parallax-section\"&gt;\n  &lt;div class=\"parallax-content\"&gt;\n    &lt;h2&gt;\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306e\u30b5\u30f3\u30d7\u30eb&lt;\/h2&gt;\n    &lt;p&gt;\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u80cc\u666f\u306e\u52d5\u304d\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046&lt;\/p&gt;\n  &lt;\/div&gt;\n&lt;\/section&gt;\n\n&lt;!-- \u901a\u5e38\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u30bb\u30af\u30b7\u30e7\u30f3 --&gt;\n&lt;section class=\"normal-section\"&gt;\n  &lt;p&gt;\u901a\u5e38\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30f3\u30c4\u3067\u3059\u3002&lt;\/p&gt;\n&lt;\/section&gt;\n\n&lt;!-- 2\u3064\u76ee\u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30bb\u30af\u30b7\u30e7\u30f3 --&gt;\n&lt;section class=\"parallax-section parallax-section--second\"&gt;\n  &lt;div class=\"parallax-content\"&gt;\n    &lt;h2&gt;2\u3064\u76ee\u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30bb\u30af\u30b7\u30e7\u30f3&lt;\/h2&gt;\n  &lt;\/div&gt;\n&lt;\/section&gt;\n<\/code><\/pre><\/div>\n\n<h3>\u57fa\u672c\u306eCSS\uff08background-attachment: fixed\uff09<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u57fa\u672c\u30b9\u30bf\u30a4\u30eb *\/\n.parallax-section {\n  background-image: url('images\/parallax-bg.jpg');\n  background-attachment: fixed;   \/* \u2190 \u3053\u308c\u304c\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306e\u6838\u5fc3 *\/\n  background-position: center;\n  background-repeat: no-repeat;\n  background-size: cover;\n  height: 500px;\n  display: flex;\n  align-items: center;\n  justify-content: center;\n}\n\n\/* \u30c6\u30ad\u30b9\u30c8\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u898b\u3084\u3059\u3055\u3092\u78ba\u4fdd *\/\n.parallax-content {\n  text-align: center;\n  color: #ffffff;\n  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);\n}\n\n.parallax-content h2 {\n  font-size: 2.5rem;\n  margin-bottom: 16px;\n}\n\n\/* \u901a\u5e38\u30bb\u30af\u30b7\u30e7\u30f3 *\/\n.normal-section {\n  padding: 80px 40px;\n  background-color: #ffffff;\n  text-align: center;\n  font-size: 1.1rem;\n  line-height: 1.8;\n}\n\n\/* 2\u3064\u76ee\u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\uff1a\u5225\u306e\u753b\u50cf\u3092\u8a2d\u5b9a *\/\n.parallax-section--second {\n  background-image: url('images\/parallax-bg2.jpg');\n}\n<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><strong>\u30dd\u30a4\u30f3\u30c8\u306f<code>background-attachment: fixed;<\/code>\u306e1\u884c\u3060\u3051<\/strong>\u3067\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u80cc\u666f\u753b\u50cf\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\uff08\u753b\u9762\uff09\u306b\u5bfe\u3057\u3066\u56fa\u5b9a\u3055\u308c\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u3060\u3051\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u305f\u3081\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u304c\u751f\u307e\u308c\u307e\u3059\u3002<\/p>\n\n<h3>background-attachment\u306e\u5404\u5024\u306e\u9055\u3044<\/h3>\n\n<div style=\"overflow-x:auto;\">\n<table style=\"width:100%;border-collapse:collapse;margin:16px 0;\">\n<thead>\n<tr style=\"background:#4a90e2;color:#fff;\">\n<th style=\"padding:12px 16px;text-align:left;\">\u5024<\/th>\n<th style=\"padding:12px 16px;text-align:left;\">\u52d5\u4f5c<\/th>\n<th style=\"padding:12px 16px;text-align:left;\">\u4e3b\u306a\u7528\u9014<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #ddd;\">\n<td style=\"padding:12px 16px;\"><code>scroll<\/code>\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/td>\n<td style=\"padding:12px 16px;\">\u80cc\u666f\u304c\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u4e00\u7dd2\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b<\/td>\n<td style=\"padding:12px 16px;\">\u901a\u5e38\u306e\u80cc\u666f\u753b\u50cf<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #ddd;background:#f9f9f9;\">\n<td style=\"padding:12px 16px;\"><code>fixed<\/code><\/td>\n<td style=\"padding:12px 16px;\">\u80cc\u666f\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u56fa\u5b9a\u3055\u308c\u308b<\/td>\n<td style=\"padding:12px 16px;\"><strong>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c<\/strong><\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #ddd;\">\n<td style=\"padding:12px 16px;\"><code>local<\/code><\/td>\n<td style=\"padding:12px 16px;\">\u80cc\u666f\u304c\u8981\u7d20\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u8ffd\u5f93\u3059\u308b<\/td>\n<td style=\"padding:12px 16px;\">\u30b9\u30af\u30ed\u30fc\u30eb\u53ef\u80fd\u306a\u30dc\u30c3\u30af\u30b9\u5185<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<h2>JavaScript\u3092\u4f7f\u3063\u305f\u3088\u308a\u6ed1\u3089\u304b\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u5b9f\u88c5<\/h2>\n\n<p class=\"wp-block-paragraph\"><code>background-attachment: fixed<\/code>\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001<strong>iOS\u306eSafari\u3067\u306f\u52d5\u4f5c\u3057\u306a\u3044<\/strong>\u3068\u3044\u3046\u6709\u540d\u306a\u554f\u984c\u304c\u3042\u308a\u307e\u3059\uff08\u5f8c\u8ff0\uff09\u3002\u3088\u308a\u5e45\u5e83\u3044\u30d6\u30e9\u30a6\u30b6\u30fb\u30c7\u30d0\u30a4\u30b9\u306b\u5bfe\u5fdc\u3057\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u901f\u5ea6\u3092\u7d30\u304b\u304f\u8abf\u6574\u3057\u305f\u3044\u5834\u5408\u306f\u3001JavaScript\u3067\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">JavaScript\u306b\u3088\u308b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u5b9f\u88c5\u30b3\u30fc\u30c9<\/h3>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u306b\u5fdc\u3058\u3066\u80cc\u666f\u8981\u7d20\u3092 <code>transform: translate3d()<\/code> \u3067\u52d5\u304b\u3059\u65b9\u6cd5\u3067\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">requestAnimationFrame \u3067\u30b9\u30af\u30ed\u30fc\u30eb\u51e6\u7406\u3092\u63cf\u753b\u306b\u540c\u671f\u3055\u305b\u3066\u9593\u5f15\u304f<\/span><\/strong>\u3053\u3068\u3067\u3001\u30ab\u30af\u3064\u304d\u306e\u5c11\u306a\u3044\u6ed1\u3089\u304b\u306a\u52d5\u304d\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<code>background-attachment: fixed<\/code> \u3068\u9055\u3044\u3001iOS Safari \u3067\u3082\u554f\u984c\u306a\u304f\u52d5\u4f5c\u3059\u308b\u306e\u304c\u5927\u304d\u306a\u5229\u70b9\u3067\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!DOCTYPE html&gt;\n&lt;html lang=\"ja\"&gt;\n&lt;head&gt;\n  &lt;meta charset=\"UTF-8\"&gt;\n  &lt;meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"&gt;\n  &lt;title&gt;JavaScript\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30b5\u30f3\u30d7\u30eb&lt;\/title&gt;\n  &lt;style&gt;\n    * { margin: 0; padding: 0; box-sizing: border-box; }\n\n    .parallax-wrapper {\n      position: relative;\n      height: 500px;\n      overflow: hidden;            \/* \u306f\u307f\u51fa\u305f\u80cc\u666f\u3092\u96a0\u3059 *\/\n    }\n\n    .parallax-bg {\n      position: absolute;\n      top: 0; left: 0;\n      width: 100%;\n      height: 130%;                \/* \u52d5\u304f\u5206\u3060\u3051\u4f59\u767d\u3092\u6301\u305f\u305b\u308b *\/\n      background: url('images\/bg.jpg') center \/ cover no-repeat;\n      will-change: transform;      \/* GPU \u5408\u6210\u3067\u30ab\u30af\u3064\u304d\u3092\u8efd\u6e1b *\/\n    }\n\n    .parallax-content {\n      position: relative;\n      z-index: 1;\n      display: flex;\n      align-items: center;\n      justify-content: center;\n      height: 100%;\n      color: #fff;\n      text-shadow: 0 2px 8px rgba(0,0,0,.6);\n    }\n  &lt;\/style&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n  &lt;section class=\"parallax-wrapper\"&gt;\n    &lt;div class=\"parallax-bg\" data-speed=\"0.3\"&gt;&lt;\/div&gt;\n    &lt;div class=\"parallax-content\"&gt;&lt;h2&gt;Parallax Sample&lt;\/h2&gt;&lt;\/div&gt;\n  &lt;\/section&gt;\n\n  &lt;script&gt;\n    const bg = document.querySelector('.parallax-bg');\n    let latestY = 0, ticking = false;\n\n    function update() {\n      const speed = parseFloat(bg.dataset.speed) || 0.3;\n      \/\/ \u30b9\u30af\u30ed\u30fc\u30eb\u91cf \u00d7 \u901f\u5ea6\u3060\u3051\u80cc\u666f\u3092\u4e0a\u3078\u52d5\u304b\u3059\n      bg.style.transform = `translate3d(0, ${latestY * speed}px, 0)`;\n      ticking = false;\n    }\n\n    window.addEventListener('scroll', () =&gt; {\n      latestY = window.scrollY;\n      \/\/ requestAnimationFrame \u3067\u63cf\u753b\u306b\u540c\u671f\u3055\u305b\u51e6\u7406\u3092\u9593\u5f15\u304f\n      if (!ticking) {\n        window.requestAnimationFrame(update);\n        ticking = true;\n      }\n    }, { passive: true });\n  &lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u30dd\u30a4\u30f3\u30c8\u306f3\u3064\u3067\u3059\u3002\u2460<code>overflow: hidden<\/code> \u3067\u4f59\u5206\u306a\u80cc\u666f\u3092\u96a0\u3059\u3001\u2461\u80cc\u666f\u306b <code>height: 130%<\/code> \u306e\u3088\u3046\u306b\u4f59\u767d\u3092\u6301\u305f\u305b\u3066\u52d5\u304f\u5206\u3092\u78ba\u4fdd\u3059\u308b\u3001\u2462<code>requestAnimationFrame<\/code> \u3067\u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u3092\u9593\u5f15\u3044\u3066\u8ca0\u8377\u3092\u4e0b\u3052\u308b\u2014\u2014\u3053\u306e\u8a2d\u8a08\u306b\u3059\u308b\u3053\u3068\u3067\u300160fps \u306b\u8fd1\u3044\u6ed1\u3089\u304b\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u3010\u5fdc\u7528\u3011CSS transform \u3068 perspective \u3067\u4f5c\u308b3D\u30d1\u30e9\u30e9\u30c3\u30af\u30b9<\/h2>\n<!-- withmedia-diagram -->\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-2_3d_layers.png\" alt=\"perspective\u3068translateZ\u30673D\u306e\u5965\u884c\u304d\u3092\u4f5c\u308b\u30ec\u30a4\u30e4\u30fc\u69cb\u9020\u306e\u56f3\u89e3\" class=\"wp-image-16722\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-2_3d_layers.png 1200w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-2_3d_layers-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n<p class=\"wp-block-paragraph\">\u3088\u308a\u5965\u884c\u304d\u306e\u3042\u308b\u7acb\u4f53\u7684\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3092\u4f5c\u308a\u305f\u3044\u306a\u3089\u3001<strong><span class=\"swl-marker mark_yellow\">perspective \u3068 translateZ \u3092\u7d44\u307f\u5408\u308f\u305b\u305f3D\u624b\u6cd5<\/span><\/strong>\u304c\u6709\u52b9\u3067\u3059\u3002JavaScript \u3092\u4f7f\u308f\u305a\u3001CSS\u3060\u3051\u3067\u8981\u7d20\u3054\u3068\u306b\u7570\u306a\u308b\u5965\u884c\u304d\u3092\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">3D\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306e\u4ed5\u7d44\u307f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u89aa\u8981\u7d20\u306b <code>perspective<\/code>\uff08\u8996\u70b9\u304b\u3089\u306e\u8ddd\u96e2\uff09\u3092\u6307\u5b9a\u3057\u3001\u5b50\u8981\u7d20\u306b <code>translateZ()<\/code> \u3067\u5965\u884c\u304d\u3092\u4e0e\u3048\u307e\u3059\u3002\u624b\u524d\u306e\u8981\u7d20\u307b\u3069\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u901f\u304f\u52d5\u304d\u3001\u5965\u306e\u8981\u7d20\u306f\u3086\u3063\u304f\u308a\u52d5\u304f\u305f\u3081\u3001\u81ea\u7136\u306a\u8996\u5dee\u304c\u751f\u307e\u308c\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.scene {\n  height: 100vh;\n  overflow-x: hidden;\n  overflow-y: auto;\n  perspective: 10px;          \/* \u8996\u70b9\u304b\u3089\u306e\u8ddd\u96e2\u3002\u5c0f\u3055\u3044\u307b\u3069\u52b9\u679c\u304c\u5f37\u3044 *\/\n  perspective-origin: center;\n}\n\n.layer {\n  position: absolute;\n  inset: 0;\n  transform-style: preserve-3d;\n}\n\n\/* \u5965\u306e\u30ec\u30a4\u30e4\u30fc\uff1a\u3086\u3063\u304f\u308a\u52d5\u304f *\/\n.layer--back  { transform: translateZ(-10px) scale(2); }\n\/* \u4e2d\u9593\u30ec\u30a4\u30e4\u30fc *\/\n.layer--mid   { transform: translateZ(-5px)  scale(1.5); }\n\/* \u624b\u524d\u306e\u30ec\u30a4\u30e4\u30fc\uff1a\u7b49\u500d\u30fb\u901a\u5e38\u901f\u5ea6 *\/\n.layer--front { transform: translateZ(0); }<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><code>translateZ<\/code> \u3067\u30de\u30a4\u30ca\u30b9\u65b9\u5411\u306b\u52d5\u304b\u3059\u3068\u8981\u7d20\u304c\u5965\u306b\u4e0b\u304c\u3063\u3066\u5c0f\u3055\u304f\u898b\u3048\u308b\u305f\u3081\u3001<code>scale()<\/code> \u3067\u898b\u304b\u3051\u306e\u5927\u304d\u3055\u3092\u88dc\u6b63\u3057\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">\u30b9\u30af\u30ed\u30fc\u30eb\u51e6\u7406\u3092\u4e00\u5207\u66f8\u304b\u305a\u306bGPU\u3060\u3051\u3067\u5b8c\u7d50\u3059\u308b<\/span><\/strong>\u305f\u3081\u975e\u5e38\u306b\u8efd\u91cf\u3067\u3001\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\u306a\u308960fps\u3067\u6ed1\u3089\u304b\u306b\u52d5\u304d\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">position: sticky \u3092\u4f7f\u3063\u305f\u30e2\u30c0\u30f3\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u6f14\u51fa<\/h2>\n\n<p class=\"wp-block-paragraph\">\u8fd1\u5e74\u306eWeb\u30c7\u30b6\u30a4\u30f3\u3067\u306f\u3001<code>position: sticky<\/code> \u3092\u4f7f\u3063\u305f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u98a8\u306e\u6f14\u51fa\u3082\u5b9a\u756a\u3067\u3059\u3002\u8981\u7d20\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u4e2d\u306b\u4e00\u5b9a\u4f4d\u7f6e\u3067\u300c\u8cbc\u308a\u4ed8\u3051\u300d\u3001\u80cc\u5f8c\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3060\u3051\u3092\u6d41\u3059\u3053\u3068\u3067\u3001\u30ec\u30a4\u30e4\u30fc\u304c\u91cd\u306a\u308b\u3088\u3046\u306a\u5965\u884c\u304d\u8868\u73fe\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.sticky-section {\n  position: sticky;\n  top: 0;\n  height: 100vh;\n  display: grid;\n  place-items: center;\n}\n\n\/* \u5f8c\u308d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304c sticky \u8981\u7d20\u306e\u4e0a\u306b\u91cd\u306a\u3063\u3066\u6d41\u308c\u308b *\/\n.next-section {\n  position: relative;\n  z-index: 1;\n  background: #fff;\n  min-height: 100vh;\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><code>sticky<\/code> \u306f JavaScript \u4e0d\u8981\u3067\u3001<strong><span class=\"swl-marker mark_yellow\">\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u306e\u91cd\u3044\u51e6\u7406\u3092\u907f\u3051\u3089\u308c\u308b<\/span><\/strong>\u306e\u304c\u5229\u70b9\u3067\u3059\u3002\u300c\u30ab\u30fc\u30c9\u304c\u91cd\u306a\u3063\u3066\u9032\u3080LP\u300d\u300c\u7ae0\u3054\u3068\u306b\u80cc\u666f\u304c\u5207\u308a\u66ff\u308f\u308b\u8a18\u4e8b\u300d\u306a\u3069\u306b\u5411\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u30102026\u5e74\u6700\u65b0\u3011CSS\u30b9\u30af\u30ed\u30fc\u30eb\u99c6\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067JavaScript\u306a\u3057\u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9<\/h2>\n\n<p class=\"wp-block-paragraph\">\u8fd1\u5e74\u3082\u3063\u3068\u3082\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u3001<strong><span class=\"swl-marker mark_yellow\">CSS\u30b9\u30af\u30ed\u30fc\u30eb\u99c6\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\uff08Scroll-driven Animations\uff09<\/span><\/strong>\u3067\u3059\u3002<code>animation-timeline<\/code> \u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3048\u3070\u3001<strong>JavaScript\u3092\u4e00\u5207\u66f8\u304b\u305a\u306b<\/strong>\u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u3068\u9023\u52d5\u3057\u305f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002Chrome\u30fbEdge 115\u4ee5\u964d\u3001Firefox\u30fbSafari \u3082\u5bfe\u5fdc\u304c\u9032\u307f\u30012024\u5e74\u4ee5\u964d\u306e\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\u3067\u5e83\u304f\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">scroll() \u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\uff1a\u30b9\u30af\u30ed\u30fc\u30eb\u5168\u4f53\u306b\u9023\u52d5\u3055\u305b\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\"><code>animation-timeline: scroll()<\/code> \u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u9032\u884c\u304c\u300c\u6642\u9593\u300d\u3067\u306f\u306a\u304f\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u4f4d\u7f6e\u300d\u306b\u7d10\u3065\u304d\u307e\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u6b62\u3081\u308c\u3070\u80cc\u666f\u3082\u6b62\u307e\u308a\u3001\u623b\u305b\u3070\u80cc\u666f\u3082\u623b\u308b\u2014\u2014\u5b8c\u5168\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3068\u540c\u671f\u3057\u305f\u52d5\u304d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.parallax-bg {\n  position: absolute;\n  inset: 0;\n  background: url('images\/bg.jpg') center \/ cover no-repeat;\n\n  \/* \u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u306b\u5fdc\u3058\u3066\u80cc\u666f\u3092\u4e0a\u3078\u52d5\u304b\u3059 *\/\n  animation: parallax-move linear both;\n  animation-timeline: scroll(root block); \/* \u30da\u30fc\u30b8\u5168\u4f53\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u9023\u52d5 *\/\n}\n\n@keyframes parallax-move {\n  from { transform: translateY(0); }\n  to   { transform: translateY(-20%); } \/* \u524d\u666f\u3088\u308a\u9045\u304f\u52d5\u304b\u3057\u3066\u8996\u5dee\u3092\u4f5c\u308b *\/\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><code>scroll(root block)<\/code> \u306f\u300c\u30eb\u30fc\u30c8\u8981\u7d20\u306e\u7e26\u30b9\u30af\u30ed\u30fc\u30eb\u300d\u3092\u57fa\u6e96\u306b\u3059\u308b\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<code>animation-timeline<\/code> \u306b\u7d10\u3065\u304f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u81ea\u52d5\u3067<strong>\u30b9\u30af\u30ed\u30fc\u30eb\u4f4d\u7f6e\uff1d\u9032\u6357<\/strong>\u306b\u5909\u63db\u3055\u308c\u308b\u305f\u3081\u3001<code>requestAnimationFrame<\/code> \u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">view() \u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\uff1a\u8981\u7d20\u304c\u753b\u9762\u306b\u5165\u308b\u52d5\u304d\u306b\u9023\u52d5\u3055\u305b\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\"><code>animation-timeline: view()<\/code> \u306f\u3001<strong>\u305d\u306e\u8981\u7d20\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u5165\u3063\u3066\u304b\u3089\u51fa\u308b\u307e\u3067<\/strong>\u3092\u9032\u6357\u306b\u3057\u307e\u3059\u3002\u753b\u50cf\u304c\u753b\u9762\u306b\u5165\u308b\u3042\u3044\u3060\u3060\u3051\u3086\u3063\u304f\u308a\u52d5\u304f\u3001\u5199\u771f\u30ae\u30e3\u30e9\u30ea\u30fc\u306e\u3088\u3046\u306a\u81ea\u7136\u306a\u8996\u5dee\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.gallery-img {\n  animation: img-parallax linear both;\n  animation-timeline: view();          \/* \u8981\u7d20\u304c\u53ef\u8996\u7bc4\u56f2\u306b\u3042\u308b\u9593\u3060\u3051\u9032\u884c *\/\n  animation-range: entry cover exit;   \/* \u5165\u308a\u59cb\u3081\u301c\u629c\u3051\u5207\u308a\u307e\u3067\u3092\u7bc4\u56f2\u306b *\/\n}\n\n@keyframes img-parallax {\n  from { transform: translateY(-12%) scale(1.1); }\n  to   { transform: translateY(12%)  scale(1.1); }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><code>animation-range<\/code> \u3067\u300c\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u304b\u3089\u3069\u3053\u307e\u3067\u300d\u3092\u7d30\u304b\u304f\u6307\u5b9a\u3067\u304d\u308b\u306e\u304c\u5f37\u529b\u3067\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">JS\u306eIntersectionObserver\uff0bscroll\u30a4\u30d9\u30f3\u30c8\u3067\u66f8\u3044\u3066\u3044\u305f\u51e6\u7406\u304c\u3001CSS\u6570\u884c\u306b\u7f6e\u304d\u63db\u308f\u308b<\/span><\/strong>\u306e\u304c\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u672a\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u3078\u306e\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af<\/h3>\n\n<p class=\"wp-block-paragraph\">Safari \u306a\u3069\u4e00\u90e8\u74b0\u5883\u3067\u306f\u307e\u3060\u672a\u5bfe\u5fdc\u306e\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<code>@supports<\/code> \u3067\u5206\u5c90\u3059\u308c\u3070\u3001\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u3060\u3051\u8996\u5dee\u3092\u6709\u52b9\u5316\u3057\u3001\u672a\u5bfe\u5fdc\u74b0\u5883\u3067\u306f\u901a\u5e38\u8868\u793a\u306b\u5b89\u5168\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>@supports (animation-timeline: scroll()) {\n  .parallax-bg {\n    animation: parallax-move linear both;\n    animation-timeline: scroll(root block);\n  }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u300cJS\u306a\u3057\u30fb\u8efd\u91cf\u30fb\u30b9\u30af\u30ed\u30fc\u30eb\u5b8c\u5168\u540c\u671f\u300d\u306e\u4e09\u62cd\u5b50\u304c\u305d\u308d\u3046<\/span><\/strong>\u306e\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u99c6\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u9b45\u529b\u3067\u3059\u3002\u3053\u308c\u304b\u3089\u65b0\u898f\u306b\u5b9f\u88c5\u3059\u308b\u306a\u3089\u3001\u307e\u305a\u3053\u306e\u624b\u6cd5\u3092\u7b2c\u4e00\u5019\u88dc\u306b\u691c\u8a0e\u3059\u308b\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u3092\u4e21\u7acb\u3055\u305b\u308b\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n<!-- withmedia-diagram -->\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-3_performance.png\" alt=\"\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u6700\u9069\u5316\u306e3\u539f\u5247\uff08GPU\u5408\u6210\u30fb\u30a4\u30d9\u30f3\u30c8\u9593\u5f15\u304d\u30fbprefers-reduced-motion\uff09\u306e\u56f3\u89e3\" class=\"wp-image-16723\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-3_performance.png 1200w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/11565-3_performance-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n<p class=\"wp-block-paragraph\">\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306f\u898b\u6804\u3048\u304c\u826f\u3044\u53cd\u9762\u3001\u5b9f\u88c5\u3092\u8aa4\u308b\u3068<strong><span class=\"swl-marker mark_yellow\">\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30ab\u30af\u3064\u304d\u30fb\u30b9\u30de\u30db\u306e\u767a\u71b1\u30fb\u4e57\u308a\u7269\u9154\u3044<\/span><\/strong>\u3092\u62db\u304d\u307e\u3059\u3002\u516c\u958b\u524d\u306b\u5fc5\u305a\u6b21\u306e3\u70b9\u3092\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u2460 will-change \u3068 translate3d \u3067 GPU \u5408\u6210\u306b\u8f09\u305b\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\">\u4f4d\u7f6e\u3092\u52d5\u304b\u3059\u3068\u304d\u306f <code>top\/left<\/code> \u3067\u306f\u306a\u304f <code>transform: translate3d()<\/code> \u3092\u4f7f\u3044\u307e\u3059\u3002\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u518d\u8a08\u7b97\uff08\u30ea\u30d5\u30ed\u30fc\uff09\u304c\u767a\u751f\u305b\u305a\u3001GPU \u306e\u5408\u6210\u30ec\u30a4\u30e4\u30fc\u3060\u3051\u3067\u51e6\u7406\u3055\u308c\u308b\u305f\u3081\u6ed1\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002<code>will-change: transform<\/code> \u3092\u6dfb\u3048\u308b\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u4e8b\u524d\u306b\u6700\u9069\u5316\u3092\u6e96\u5099\u3057\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u2461 \u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u306f requestAnimationFrame \u3067\u9593\u5f15\u304f<\/h3>\n\n<p class=\"wp-block-paragraph\"><code>scroll<\/code> \u30a4\u30d9\u30f3\u30c8\u306f1\u79d2\u9593\u306b\u4f55\u5341\u56de\u3082\u767a\u706b\u3057\u307e\u3059\u3002\u6bce\u56deDOM\u3092\u89e6\u308b\u3068\u91cd\u304f\u306a\u308b\u305f\u3081\u3001<code>requestAnimationFrame<\/code> \u3067\u30d5\u30ec\u30fc\u30e0\u306b\u540c\u671f\u3055\u305b\u3001\u30ea\u30b9\u30ca\u30fc\u306b\u306f <code>{ passive: true }<\/code> \u3092\u4ed8\u3051\u3066\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u30d6\u30ed\u30c3\u30af\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u2462 prefers-reduced-motion \u3067\u300c\u52d5\u304d\u3092\u6e1b\u3089\u3059\u300d\u8a2d\u5b9a\u3092\u5c0a\u91cd\u3059\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\">OS\u306e\u300c\u8996\u5dee\u52b9\u679c\u3092\u6e1b\u3089\u3059\uff0f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u6e1b\u3089\u3059\u300d\u8a2d\u5b9a\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u6b62\u3081\u308b\u306e\u304c\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u306e\u57fa\u672c<\/span><\/strong>\u3067\u3059\u3002\u6b21\u306e\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3067\u7c21\u5358\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30e6\u30fc\u30b6\u30fc\u304c\u300c\u52d5\u304d\u3092\u6e1b\u3089\u3059\u300d\u8a2d\u5b9a\u306a\u3089\u8996\u5dee\u3092\u7121\u52b9\u5316 *\/\n@media (prefers-reduced-motion: reduce) {\n  .parallax-bg,\n  .layer {\n    transform: none !important;\n    transition: none !important;\n  }\n}<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u914d\u616e\u306f<strong><span class=\"swl-marker mark_yellow\">SEO\u30fbLLMO\u306e\u89b3\u70b9\u3067\u3082\u91cd\u8981<\/span><\/strong>\u3067\u3059\u3002\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u3084AI\u306f\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u306b\u914d\u616e\u3057\u305f\u9ad8\u54c1\u8cea\u306a\u30da\u30fc\u30b8\u3092\u8a55\u4fa1\u3059\u308b\u50be\u5411\u304c\u5f37\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">iOS Safari \u3067 background-attachment: fixed \u304c\u52b9\u304b\u306a\u3044\u554f\u984c\u3068\u56de\u907f\u7b56<\/h2>\n\n<p class=\"wp-block-paragraph\">CSS\u3060\u3051\u3067\u4f5c\u308b <code>background-attachment: fixed<\/code> \u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306b\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">iOS Safari\uff08iPhone\/iPad\uff09\u3067\u306f\u56fa\u5b9a\u80cc\u666f\u304c\u52d5\u4f5c\u3057\u306a\u3044<\/span><\/strong>\u3068\u3044\u3046\u6709\u540d\u306a\u5236\u7d04\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u7406\u7531\u3067\u610f\u56f3\u7684\u306b\u7121\u52b9\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u80cc\u666f\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u8ffd\u5f93\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u56de\u907f\u7b561\uff1a\u64ec\u4f3c\u8981\u7d20\uff0bfixed \u80cc\u666f\u306b\u7f6e\u304d\u63db\u3048\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\">\u80cc\u666f\u3092\u8981\u7d20\u672c\u4f53\u3067\u306f\u306a\u304f <code>::before<\/code> \u64ec\u4f3c\u8981\u7d20\u306b <code>position: fixed<\/code> \u3067\u6577\u304f\u65b9\u6cd5\u3067\u3059\u3002\u591a\u304f\u306e\u74b0\u5883\u3067 fixed \u80cc\u666f\u3068\u8fd1\u3044\u898b\u305f\u76ee\u3092\u518d\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>.parallax-section {\n  position: relative;\n  overflow: hidden;\n  isolation: isolate;\n}\n\n.parallax-section::before {\n  content: \"\";\n  position: fixed;\n  inset: 0;\n  z-index: -1;\n  background: url('images\/bg.jpg') center \/ cover no-repeat;\n}<\/code><\/pre><\/div>\n\n<h3 class=\"wp-block-heading\">\u56de\u907f\u7b562\uff1aJavaScript \u5b9f\u88c5\u306b\u5207\u308a\u66ff\u3048\u308b<\/h3>\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u78ba\u5b9f\u306a\u306e\u306f\u3001\u524d\u8ff0\u306e <code>transform + requestAnimationFrame<\/code> \u306b\u3088\u308b JavaScript \u5b9f\u88c5\u3067\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">iOS\u3092\u542b\u3080\u5168\u30c7\u30d0\u30a4\u30b9\u3067\u5b89\u5b9a\u3057\u3066\u52d5\u304f<\/span><\/strong>\u305f\u3081\u3001\u30e2\u30d0\u30a4\u30eb\u6bd4\u7387\u304c\u9ad8\u3044\u30b5\u30a4\u30c8\u3067\u306f\u3053\u3061\u3089\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3092\u624b\u8efd\u306b\u5b9f\u88c5\u3067\u304d\u308bJavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\u6bd4\u8f03<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30bc\u30ed\u304b\u3089\u66f8\u304b\u305a\u306b\u6e08\u307e\u305b\u305f\u3044\u306a\u3089\u3001\u5c02\u7528\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u4fbf\u5229\u3067\u3059\u3002\u4ee3\u8868\u7684\u306a4\u3064\u3092\u3001\u7279\u5fb4\u30fb\u5bb9\u91cf\u30fb\u5411\u304d\u4e0d\u5411\u304d\u3067\u6bd4\u8f03\u3057\u307e\u3057\u305f\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u30e9\u30a4\u30d6\u30e9\u30ea<\/th><th>\u7279\u5fb4<\/th><th>\u5bb9\u91cf\u306e\u76ee\u5b89<\/th><th>\u5411\u3044\u3066\u3044\u308b\u7528\u9014<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>Rellax.js<\/strong><\/td><td>data\u5c5e\u6027\u3067\u901f\u5ea6\u6307\u5b9a\u3059\u308b\u3060\u3051\u3002\u8d85\u8efd\u91cf\u30fb\u4f9d\u5b58\u306a\u3057<\/td><td>\u7d047KB<\/td><td>\u624b\u8efd\u306a\u80cc\u666f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9<\/td><\/tr>\n<tr><td><strong>simpleParallax.js<\/strong><\/td><td>\u753b\u50cf\u306b\u81ea\u7136\u306a\u8996\u5dee\u3092\u4ed8\u3051\u308b\u306e\u306b\u7279\u5316<\/td><td>\u7d0410KB<\/td><td>\u5199\u771f\u30ae\u30e3\u30e9\u30ea\u30fc\u30fbLP<\/td><\/tr>\n<tr><td><strong>AOS<\/strong><\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u8981\u7d20\u3092\u30d5\u30a7\u30fc\u30c9\uff0f\u30b9\u30e9\u30a4\u30c9\u8868\u793a<\/td><td>\u7d0414KB<\/td><td>\u8981\u7d20\u306e\u767b\u5834\u30a2\u30cb\u30e1\u5168\u822c<\/td><\/tr>\n<tr><td><strong>locomotive-scroll<\/strong><\/td><td>\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\uff0b\u9ad8\u5ea6\u306a\u8996\u5dee\u3002\u8868\u73fe\u529b\u304c\u9ad8\u3044<\/td><td>\u7d0440KB\uff0b<\/td><td>\u30ea\u30c3\u30c1\u306a\u5236\u4f5c\u7cfb\u30b5\u30a4\u30c8<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u30b7\u30f3\u30d7\u30eb\u306a\u80cc\u666f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306a\u3089 Rellax.js\u3001<strong><span class=\"swl-marker mark_yellow\">\u4f5c\u54c1\u6027\u306e\u9ad8\u3044\u30b5\u30a4\u30c8\u3092\u4f5c\u308b\u306a\u3089 locomotive-scroll<\/span><\/strong> \u304c\u5b9a\u756a\u3067\u3059\u3002\u305f\u3060\u3057\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u5bb9\u91cf\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306b\u306a\u308b\u305f\u3081\u3001\u7528\u9014\u306b\u5bfe\u3057\u3066\u904e\u5270\u306b\u306a\u3089\u306a\u3044\u3082\u306e\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- Rellax.js \u306e\u6700\u5c0f\u30b5\u30f3\u30d7\u30eb --&gt;\n&lt;div class=\"rellax\" data-rellax-speed=\"-4\"&gt;&lt;\/div&gt;\n\n&lt;script src=\"https:\/\/cdn.jsdelivr.net\/npm\/rellax\/rellax.min.js\"&gt;&lt;\/script&gt;\n&lt;script&gt;\n  new Rellax('.rellax'); \/\/ data-rellax-speed \u306e\u5024\u3067\u901f\u5ea6\u3092\u8abf\u6574\n&lt;\/script&gt;<\/code><\/pre><\/div>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u5b9f\u88c5\u3067\u3088\u304f\u3042\u308b\u5931\u6557\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u3088\u304f\u3042\u308b\u5931\u6557<\/th><th>\u539f\u56e0<\/th><th>\u5bfe\u51e6\u6cd5<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30b9\u30de\u30db\u3067\u80cc\u666f\u304c\u52d5\u304b\u306a\u3044<\/td><td>iOS Safari \u304c background-attachment: fixed \u3092\u7121\u52b9\u5316<\/td><td>\u64ec\u4f3c\u8981\u7d20 fixed \u304b JavaScript \u5b9f\u88c5\u306b\u5207\u66ff<\/td><\/tr>\n<tr><td>\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u30ab\u30af\u3064\u304f<\/td><td>top\/left \u3067\u4f4d\u7f6e\u3092\u52d5\u304b\u3057\u3066\u30ea\u30d5\u30ed\u30fc\u304c\u767a\u751f<\/td><td>transform: translate3d \u3068 will-change \u3092\u4f7f\u3046<\/td><\/tr>\n<tr><td>\u6587\u5b57\u304c\u80cc\u666f\u306b\u57cb\u3082\u308c\u3066\u8aad\u3081\u306a\u3044<\/td><td>\u80cc\u666f\u3068\u6587\u5b57\u8272\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u4e0d\u8db3<\/td><td>text-shadow \u3084\u30aa\u30fc\u30d0\u30fc\u30ec\u30a4\uff08\u534a\u900f\u660e\u306e\u9ed2\uff09\u3092\u91cd\u306d\u308b<\/td><\/tr>\n<tr><td>\u80cc\u666f\u306e\u7aef\u306b\u9699\u9593\u304c\u3067\u304d\u308b<\/td><td>\u52d5\u304f\u5206\u306e\u9ad8\u3055\u3092\u78ba\u4fdd\u3057\u3066\u3044\u306a\u3044<\/td><td>\u80cc\u666f\u8981\u7d20\u306b height:120\u301c130% \u306a\u3069\u4f59\u767d\u3092\u6301\u305f\u305b\u308b<\/td><\/tr>\n<tr><td>\u30da\u30fc\u30b8\u304c\u91cd\u3044\u30fb\u767a\u71b1\u3059\u308b<\/td><td>scroll \u30a4\u30d9\u30f3\u30c8\u3067\u6bce\u56de\u91cd\u3044\u51e6\u7406<\/td><td>requestAnimationFrame \u3067\u9593\u5f15\u304d\u3001\u753b\u50cf\u3092\u8efd\u91cf\u5316<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u591a\u3044\u306e\u304c1\u3064\u76ee\u30682\u3064\u76ee\u3067\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">\u300ciOS\u3067\u52d5\u304b\u306a\u3044\u300d\u300c\u30ab\u30af\u3064\u304f\u300d\u306f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306e\u4e8c\u5927\u30c8\u30e9\u30d6\u30eb<\/span><\/strong>\u306a\u306e\u3067\u3001\u516c\u958b\u524d\u306b\u5b9f\u6a5f\u3068\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067\u5fc5\u305a\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u30fb\u30c7\u30d0\u30a4\u30b9\u306e\u5bfe\u5fdc\u72b6\u6cc1<\/h2>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u624b\u6cd5<\/th><th>PC Chrome\/Edge<\/th><th>PC Safari<\/th><th>iOS Safari<\/th><th>Android Chrome<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>background-attachment: fixed<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u00d7\uff08\u7121\u52b9\uff09<\/td><td>\u25b3\uff08\u4e00\u90e8\u4e0d\u5b89\u5b9a\uff09<\/td><\/tr>\n<tr><td>transform + JavaScript<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u25ce<\/td><\/tr>\n<tr><td>CSS perspective 3D<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u25cb<\/td><td>\u25cb<\/td><\/tr>\n<tr><td>position: sticky<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u25ce<\/td><td>\u25ce<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u30e2\u30d0\u30a4\u30eb\u307e\u3067\u542b\u3081\u3066\u5b89\u5b9a\u3055\u305b\u305f\u3044\u306a\u3089\u3001<strong><span class=\"swl-marker mark_yellow\">JavaScript\u5b9f\u88c5\u304b position: sticky \u304c\u6700\u3082\u5b89\u5168<\/span><\/strong>\u3067\u3059\u3002CSS\u306e fixed \u80cc\u666f\u306f\u300cPC\u5411\u3051\u306e\u88c5\u98fe\u300d\u3068\u5272\u308a\u5207\u308b\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081\uff5c\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306f\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308c\u3070\u521d\u5fc3\u8005\u3067\u3082\u4f5c\u308c\u308b<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306f\u3001<code>background-attachment: fixed<\/code> \u306e1\u884c\u304b\u3089\u59cb\u3081\u3089\u308c\u308b\u624b\u8efd\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3042\u308a\u306a\u304c\u3089\u3001JavaScript \u30843D transform \u3092\u7d44\u307f\u5408\u308f\u305b\u308c\u3070\u8868\u73fe\u306e\u5e45\u304c\u5927\u304d\u304f\u5e83\u304c\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u306e\u8981\u70b9\u3092\u632f\u308a\u8fd4\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>CSS\u3060\u3051\u306a\u3089 <code>background-attachment: fixed<\/code> \u304c\u6700\u77ed\u3002\u305f\u3060\u3057iOS Safari\u3067\u7121\u52b9<\/li>\n<li>\u5168\u30c7\u30d0\u30a4\u30b9\u5bfe\u5fdc\u306a\u3089 <code>transform + requestAnimationFrame<\/code> \u306eJavaScript\u5b9f\u88c5\u304c\u5b89\u5b9a<\/li>\n<li>\u7acb\u4f53\u611f\u3092\u51fa\u3059\u306a\u3089 <code>perspective + translateZ<\/code> \u306e3D\u624b\u6cd5\u304c\u8efd\u91cf\u3067\u52b9\u679c\u7684<\/li>\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f <code>will-change<\/code>\u30fb\u30a4\u30d9\u30f3\u30c8\u9593\u5f15\u304d\u30fb\u753b\u50cf\u8efd\u91cf\u5316\u3067\u6700\u9069\u5316\u3059\u308b<\/li>\n<li><code>prefers-reduced-motion<\/code> \u3067\u300c\u52d5\u304d\u3092\u6e1b\u3089\u3059\u300d\u8a2d\u5b9a\u3092\u5c0a\u91cd\u3059\u308b\u306e\u304ca11y\u306e\u57fa\u672c<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"is-style-big_icon_point wp-block-paragraph\"><strong>\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306f\u300c\u901f\u5ea6\u5dee\uff1d\u8996\u5dee\u300d\u304c\u3059\u3079\u3066\u3002<br \/>\u307e\u305a\u306fCSS1\u884c\u304b\u3089\u8a66\u3057\u3001\u6163\u308c\u305f\u3089JavaScript\u3067\u6ed1\u3089\u304b\u3055\u3068\u30e2\u30d0\u30a4\u30eb\u5bfe\u5fdc\u3092\u9ad8\u3081\u3066\u3044\u3053\u3046\u3002<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">\u624b\u3092\u52d5\u304b\u3057\u3066\u4ed5\u7d44\u307f\u3092\u4f53\u3067\u899a\u3048\u308b\u306e\u304c\u4e0a\u9054\u306e\u8fd1\u9053\u3067\u3059\u3002\u307e\u305a\u306f1\u3064\u3001\u3042\u306a\u305f\u306e\u30b5\u30a4\u30c8\u306b\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<!-- withmedia-faq -->\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q1. \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\uff08Parallax\uff09\u306f\u300c\u8996\u5dee\u300d\u3092\u610f\u5473\u3057\u3001\u8996\u70b9\u306e\u4f4d\u7f6e\u306b\u3088\u3063\u3066\u898b\u3048\u65b9\u304c\u5909\u308f\u308b\u73fe\u8c61\u3092\u6307\u3057\u307e\u3059\u3002Web\u30c7\u30b6\u30a4\u30f3\u3067\u306f\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u6642\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u901a\u5e38\u306e\u901f\u3055\u3067\u6d41\u308c\u308b\u4e00\u65b9\u3001\u80cc\u666f\u753b\u50cf\u306f\u3086\u3063\u304f\u308a\u52d5\u304f\u3053\u3068\u3067\u751f\u307e\u308c\u308b\u300c\u30ba\u30ec\u300d\u306b\u3088\u308a\u3001\u5965\u884c\u304d\u3084\u6ca1\u5165\u611f\u3092\u6f14\u51fa\u3057\u307e\u3059\u3002\u4f01\u696d\u306eLP\u3084\u30dd\u30fc\u30c8\u30d5\u30a9\u30ea\u30aa\u30b5\u30a4\u30c8\u3001\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\u30b5\u30a4\u30c8\u306a\u3069\u3067\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q2. CSS\u3060\u3051\u3067\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> \u3067\u304d\u307e\u3059\u3002\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u65b9\u6cd5\u306f\u3001\u80cc\u666f\u3092\u6301\u3064\u8981\u7d20\u306bbackground-attachment: fixed;\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6307\u5b9a\u3059\u308b\u3068\u80cc\u666f\u753b\u50cf\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\uff08\u753b\u9762\uff09\u306b\u5bfe\u3057\u3066\u56fa\u5b9a\u3055\u308c\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u3060\u3051\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u305f\u3081\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u304c\u751f\u307e\u308c\u307e\u3059\u3002\u30dd\u30a4\u30f3\u30c8\u306f\u3053\u306e1\u884c\u3060\u3051\u3067\u3001JavaScript\u306f\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q3. background-attachment\u306efixed\u3068scroll\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> \u30c7\u30d5\u30a9\u30eb\u30c8\u306escroll\u306f\u80cc\u666f\u304c\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u4e00\u7dd2\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3001\u901a\u5e38\u306e\u80cc\u666f\u753b\u50cf\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002fixed\u306f\u80cc\u666f\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u56fa\u5b9a\u3055\u308c\u308b\u305f\u3081\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u52b9\u679c\u306b\u7528\u3044\u307e\u3059\u3002\u307b\u304b\u306blocal\u3068\u3044\u3046\u5024\u3082\u3042\u308a\u3001\u3053\u308c\u306f\u30b9\u30af\u30ed\u30fc\u30eb\u53ef\u80fd\u306a\u30dc\u30c3\u30af\u30b9\u5185\u3067\u80cc\u666f\u304c\u8981\u7d20\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u8ffd\u5f93\u3059\u308b\u7528\u9014\u3067\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q4. background-attachment: fixed \u306e\u6ce8\u610f\u70b9\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> iOS\u306eSafari\u3067\u306f\u52d5\u4f5c\u3057\u306a\u3044\u3068\u3044\u3046\u6709\u540d\u306a\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u3088\u308a\u5e45\u5e83\u3044\u30d6\u30e9\u30a6\u30b6\u3084\u30c7\u30d0\u30a4\u30b9\u306b\u5bfe\u5fdc\u3057\u305f\u3044\u5834\u5408\u3084\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u901f\u5ea6\u3092\u7d30\u304b\u304f\u8abf\u6574\u3057\u305f\u3044\u5834\u5408\u306f\u3001JavaScript\u3092\u4f7f\u3063\u305f\u5b9f\u88c5\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002JavaScript\u306b\u3088\u308b\u65b9\u6cd5\u3067\u306f\u3001\u3088\u308a\u6ed1\u3089\u304b\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u8868\u73fe\u3084\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u3082\u884c\u3044\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">Q5. position: sticky \u3068\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306f\u3069\u3046\u9055\u3044\u307e\u3059\u304b\uff1f<\/h3>\n<p><strong>A.<\/strong> position: sticky \u306f\u8981\u7d20\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u4e2d\u306b\u4e00\u5b9a\u4f4d\u7f6e\u3067\u56fa\u5b9a\u3057\u3001\u80cc\u5f8c\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u6d41\u3059\u624b\u6cd5\u3067\u3059\u3002\u53b3\u5bc6\u306a\u300c\u901f\u5ea6\u5dee\u306b\u3088\u308b\u8996\u5dee\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u30ec\u30a4\u30e4\u30fc\u304c\u91cd\u306a\u308b\u30e2\u30c0\u30f3\u306a\u5965\u884c\u304d\u8868\u73fe\u304c\u3067\u304d\u3001JavaScript\u4e0d\u8981\u3067\u8efd\u91cf\u3067\u3059\u3002\u80cc\u666f\u3068\u524d\u666f\u3092\u7570\u306a\u308b\u901f\u5ea6\u3067\u52d5\u304b\u3059\u53e4\u5178\u7684\u306a\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306f transform \u3084 background-attachment \u3067\u5b9f\u88c5\u3057\u307e\u3059\u3002\u7528\u9014\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q6. \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306f\u30da\u30fc\u30b8\u3092\u91cd\u304f\u3057\u307e\u305b\u3093\u304b\uff1f<\/h3>\n<p><strong>A.<\/strong> \u5b9f\u88c5\u3092\u8aa4\u308b\u3068\u91cd\u304f\u306a\u308a\u307e\u3059\u3002\u4f4d\u7f6e\u3092 top\/left \u3067\u52d5\u304b\u3059\u3068\u30ea\u30d5\u30ed\u30fc\u304c\u767a\u751f\u3057\u3066\u91cd\u304f\u306a\u308b\u305f\u3081\u3001transform: translate3d \u3068 will-change \u3092\u4f7f\u3063\u3066GPU\u5408\u6210\u306b\u8f09\u305b\u308b\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u3055\u3089\u306bscroll\u30a4\u30d9\u30f3\u30c8\u3092 requestAnimationFrame \u3067\u9593\u5f15\u304d\u3001\u80cc\u666f\u753b\u50cf\u3092\u5727\u7e2e\u3059\u308c\u3070\u3001\u30b9\u30de\u30db\u3067\u3082\u6ed1\u3089\u304b\u306b\u52d5\u304d\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q7. \u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306fSEO\u306b\u60aa\u5f71\u97ff\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p><strong>A.<\/strong> \u9069\u5207\u306b\u5b9f\u88c5\u3059\u308c\u3070\u60aa\u5f71\u97ff\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u3001\u91cd\u3044\u5b9f\u88c5\u3067\u30da\u30fc\u30b8\u901f\u5ea6\uff08Core Web Vitals\uff09\u304c\u4f4e\u4e0b\u3059\u308b\u3068SEO\u306b\u30de\u30a4\u30ca\u30b9\u3067\u3059\u3002\u753b\u50cf\u306e\u8efd\u91cf\u5316\u3001\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3001\u30a4\u30d9\u30f3\u30c8\u9593\u5f15\u304d\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4fdd\u3066\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u3080\u3057\u308d\u6ede\u5728\u6642\u9593\u306e\u5411\u4e0a\u306a\u3069\u3001\u9593\u63a5\u7684\u306b\u30d7\u30e9\u30b9\u306b\u50cd\u304f\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q8. \u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u3067\u6c17\u3092\u3064\u3051\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p><strong>A.<\/strong> prefers-reduced-motion\uff08\u52d5\u304d\u3092\u6e1b\u3089\u3059\u8a2d\u5b9a\uff09\u3092\u5c0a\u91cd\u3059\u308b\u3053\u3068\u304c\u6700\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u8a2d\u5b9a\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u3001\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u3084\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u505c\u6b62\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u904e\u5ea6\u306a\u52d5\u304d\u306f\u4e57\u308a\u7269\u9154\u3044\uff08\u524d\u5ead\u969c\u5bb3\uff09\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u80cc\u666f\u3068\u6587\u5b57\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u5341\u5206\u306b\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3082\u5927\u5207\u3067\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q9. \u304a\u3059\u3059\u3081\u306e\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3069\u308c\u3067\u3059\u304b\uff1f<\/h3>\n<p><strong>A.<\/strong> \u624b\u8efd\u306a\u80cc\u666f\u30d1\u30e9\u30e9\u30c3\u30af\u30b9\u306a\u3089\u8d85\u8efd\u91cf\u306a Rellax.js\u3001\u5199\u771f\u306b\u81ea\u7136\u306a\u8996\u5dee\u3092\u4ed8\u3051\u308b\u306a\u3089 simpleParallax.js\u3001\u8981\u7d20\u306e\u767b\u5834\u30a2\u30cb\u30e1\u3082\u542b\u3081\u305f\u3044\u306a\u3089 AOS\u3001\u4f5c\u54c1\u6027\u306e\u9ad8\u3044\u30ea\u30c3\u30c1\u306a\u30b5\u30a4\u30c8\u306a\u3089 locomotive-scroll \u304c\u5b9a\u756a\u3067\u3059\u3002\u5bb9\u91cf\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306b\u306a\u308b\u305f\u3081\u3001\u7528\u9014\u306b\u5bfe\u3057\u3066\u904e\u5270\u306b\u306a\u3089\u306a\u3044\u3082\u306e\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<!-- withmedia-related -->\n<h2 class=\"wp-block-heading\">\u95a2\u9023\u8a18\u4e8b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/jamstackform-explanation\/\">Jamstack\u30d5\u30a9\u30fc\u30e0\u51e6\u7406\u30102026\u5e74\u7248\u3011\u30b5\u30fc\u30d0\u30fc\u30ec\u30b9\u5b9f\u88c5\u5b8c\u5168\u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/pagination-design\/\">\u30102026\u5e74\u6700\u65b0\u3011\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5\u5b8c\u5168\u30ac\u30a4\u30c9\uff5cHTML\u30b3\u30d4\u30da\u3067\u5373\u4f7f\u3048\u308bCSS\u4ed8\u304d\u30c7\u30b6\u30a4\u30f3\u96c6<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-color-change\/\">HTML\u3068CSS\u3067\u6587\u5b57\u8272\u3092\u5909\u3048\u308b\u65b9\u6cd5\uff5c\u521d\u5fc3\u8005\u5411\u3051\u5b8c\u5168\u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/markuplint-complete-guide\/\">Markuplint\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5168\u30eb\u30fc\u30eb\u89e3\u8aac\u30fbReact\/Vue\/Astro\u5bfe\u5fdc\u30fbVSCode\u30fbpre-commit\u30fbGitHub Actions\u30fb\u30ab\u30b9\u30bf\u30e0\u30eb\u30fc\u30eb\u30fb\u6bb5\u968e\u7684\u5c0e\u5165\u6226\u7565\u307e\u3067\u5fb9\u5e95\u89e3\u8aac<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/wai-aria-complete-guide\/\">WAI-ARIA\u5b8c\u5168\u30ac\u30a4\u30c9\uff5caria-label\u30fbaria-live\u30fb\u30d5\u30a9\u30fc\u30ab\u30b9\u7ba1\u7406\u30fb\u30ad\u30fc\u30dc\u30fc\u30c9\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30fbReact\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u30fbaxe\u30c6\u30b9\u30c8\u307e\u3067\u5fb9\u5e95\u89e3\u8aac<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/html-dialog\/\">HTML dialog\u8981\u7d20\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u4f7f\u3044\u65b9\u30fb\u5c5e\u6027\u30fb\u5b9f\u88c5\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-flexbox-grid-guide\/\">CSS Flexbox\u3068Grid\u3092\u4f7f\u3044\u5206\u3051\u308b\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5b9f\u6848\u4ef6\u3067\u5f79\u7acb\u3064\u30ec\u30a4\u30a2\u30a6\u30c8\u5b9f\u88c5\u306e\u57fa\u672c<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/html-not-displayed-completely-white\/\">HTML\u304c\u771f\u3063\u767d\u306b\u306a\u308b\u539f\u56e0\u3068\u89e3\u6c7a\u7b56\uff5c\u5b8c\u5168\u30ac\u30a4\u30c9<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<!-- withmedia-references -->\n<h2 class=\"wp-block-heading\">\u53c2\u8003\u30ea\u30f3\u30af\uff08\u516c\u5f0f\u30fb\u4e00\u6b21\u60c5\u5831\uff09<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/HTML\" target=\"_blank\" rel=\"noopener noreferrer\">MDN Web Docs \u2014 HTML<\/a><\/li>\n<li><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/JavaScript\" target=\"_blank\" rel=\"noopener noreferrer\">MDN Web Docs \u2014 JavaScript<\/a><\/li>\n<li><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/CSS\" target=\"_blank\" rel=\"noopener noreferrer\">MDN Web Docs \u2014 CSS<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081<\/h2>\n\n\n\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\n\n\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\n\n\n<h2 class=\"wp-block-heading\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044\uff08\u5b9f\u88c5\u30ac\u30a4\u30c9\uff09<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-overflow\/\">CSS overflow\u3067\u306f\u307f\u51fa\u3057\u30fb\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u5236\u5fa1\u3059\u308b<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-media-query\/\">CSS\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3067\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc\u3059\u308b\u65b9\u6cd5<\/a><\/li>\n<\/ul>\n\n\n\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\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\n<h3 class=\"wp-block-heading\">\u4eca\u306a\u3089\u5b8c\u5168\u7121\u6599\u3067AI\u3092\u5b66\u3079\u308b\uff01<\/h3>\n\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\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\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\n<div class=\"wp-block-buttons\"><div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color 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