{"id":18115,"date":"2026-07-14T16:29:14","date_gmt":"2026-07-14T16:29:14","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=18115"},"modified":"2026-09-20T17:21:48","modified_gmt":"2026-09-20T17:21:48","slug":"css-smooth-scroll","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/css-smooth-scroll\/","title":{"rendered":"\u30102026\u5e74\u7248\u3011CSS\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5b9f\u88c5\u65b9\u6cd5\uff5cscroll-behavior\u3068\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3092\u30b3\u30d4\u30da\u3067\u6ed1\u3089\u304b\u306b"},"content":{"rendered":"<p class=\"wp-block-paragraph\">\u300c\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u3068\u304d\u3001\u30da\u30fc\u30b8\u304c\u3044\u304d\u306a\u308a\u30b8\u30e3\u30f3\u30d7\u3057\u3066\u4f53\u9a13\u304c\u60aa\u3044\u300d\u3068\u611f\u3058\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f CSS\u306e <code>scroll-behavior: smooth<\/code> \u30921\u884c\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3001\u305d\u306e\u554f\u984c\u306f\u307b\u307c\u89e3\u6c7a\u3057\u307e\u3059\u3002JavaScript\u306f\u4e0d\u8981\u3067\u3001\u30b3\u30d4\u30da\u3057\u3066\u3059\u3050\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<strong>scroll-behavior \u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9\u3001\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u3078\u306e\u5bfe\u5fdc\uff08scroll-margin-top\uff09\u3001JavaScript\u3068\u306e\u4f7f\u3044\u5206\u3051\u3001\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1\u3001\u305d\u3057\u3066\u300c\u52b9\u304b\u306a\u3044\u300d\u3068\u304d\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>\u307e\u3067\u3001\u5b9f\u969b\u306b\u52d5\u304f\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u9806\u756a\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u521d\u3081\u3066\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u3082\u3001\u300c\u524d\u306b\u5b9f\u88c5\u3057\u305f\u3051\u3069\u4e0a\u624b\u304f\u3044\u304b\u306a\u304b\u3063\u305f\u300d\u3068\u3044\u3046\u65b9\u3082\u3001\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3059\u3063\u304d\u308a\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u5148\u306b\u3001\u3053\u306e\u8a18\u4e8b\u306e\u7d50\u8ad6\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<ul class=\"wp-block-list\"><li><strong>scroll-behavior: smooth \u3092 html \u8981\u7d20\u306b\u4ed8\u3051\u308b\u3060\u3051<\/strong>\u3067\u3001\u30da\u30fc\u30b8\u5168\u4f53\u306e\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u304c\u30b9\u30e0\u30fc\u30ba\u306b\u306a\u308b<\/li><li><strong>\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u5834\u5408\u306f scroll-margin-top<\/strong> \u3092\u30b8\u30e3\u30f3\u30d7\u5148\u8981\u7d20\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u96a0\u308c\u306a\u3044<\/li><li>JavaScript\u306e <strong>scrollIntoView({ behavior: &#8216;smooth&#8217; })<\/strong> \u3068\u5f79\u5272\u304c\u91cd\u306a\u308b\u304c\u3001CSS\u306e\u307f\u3067\u6e08\u3080\u306a\u3089 CSS \u3092\u512a\u5148\u3059\u308b\u3068\u30b7\u30f3\u30d7\u30eb\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044<\/li><li><strong>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u306e\u305f\u3081 prefers-reduced-motion<\/strong> \u3092\u8003\u616e\u3059\u308b\u3068\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u8efd\u6e1b\u8a2d\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3082\u914d\u616e\u3067\u304d\u308b<\/li><\/ul>\n<h2 class=\"wp-block-heading\">scroll-behavior: smooth \u306e\u57fa\u672c<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18115-1\"><img alt=\"scroll-behavior\u306e\u8981\u70b9\" class=\"wp-image-20911\" decoding=\"async\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-01.jpg\" width=\"1672\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-01.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-01-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-01-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u3046\u3048\u3067\u6700\u521d\u306b\u899a\u3048\u308b\u3079\u304d\u30d7\u30ed\u30d1\u30c6\u30a3\u304c <code>scroll-behavior<\/code> \u3067\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f <code>auto<\/code>\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u30fb\u5373\u6642\u79fb\u52d5\uff09\u3068 <code>smooth<\/code>\uff08\u6ed1\u3089\u304b\u306b\u79fb\u52d5\uff09\u306e2\u3064\u306e\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">CSS\u30921\u884c\u8ffd\u52a0\u3059\u308b\u3060\u3051<\/h3>\n<p class=\"wp-block-paragraph\">\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u5b9f\u88c5\u306f\u3001<code>html<\/code> \u8981\u7d20\u306b\u5bfe\u3057\u3066 <code>scroll-behavior: smooth<\/code> \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u3060\u3051\u3067\u3001\u305d\u306e\u30da\u30fc\u30b8\u4e0a\u306e\u3059\u3079\u3066\u306e\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\uff08\u30da\u30fc\u30b8\u5185 <code>#id<\/code> \u3078\u306e\u30ea\u30f3\u30af\uff09\u304c\u6ed1\u3089\u304b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30da\u30fc\u30b8\u5168\u4f53\u3092\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306b\u3059\u308b *\/\nhtml {\n  scroll-behavior: smooth;\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u305f\u3063\u305f\u3053\u308c\u3060\u3051\u3067\u3059\u3002\u5916\u90e8\u30e9\u30a4\u30d6\u30e9\u30ea\u3082\u3001JavaScript\u3082\u4e0d\u8981\u3002\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">HTML\u69cb\u9020\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\uff08\u6700\u5c0f\u30b5\u30f3\u30d7\u30eb\uff09<\/h3>\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306b\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5834\u5408\u306e\u6700\u5c0f\u69cb\u6210\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u30ea\u30f3\u30af\u5148\u8981\u7d20\u306b <code>id<\/code> \u5c5e\u6027\u3092\u4ed8\u3051\u3001\u30ea\u30f3\u30af\u5074\u306f <code>href=\"#id\u540d\"<\/code> \u3068\u66f8\u304f\u3053\u3068\u3067\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" 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;title&gt;\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30b5\u30f3\u30d7\u30eb&lt;\/title&gt;\n  &lt;style&gt;\n    html {\n      scroll-behavior: smooth;\n    }\n  &lt;\/style&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n  &lt;!-- \u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3 --&gt;\n  &lt;nav&gt;\n    &lt;a href=\"#section1\"&gt;\u30bb\u30af\u30b7\u30e7\u30f31\u3078&lt;\/a&gt;\n    &lt;a href=\"#section2\"&gt;\u30bb\u30af\u30b7\u30e7\u30f32\u3078&lt;\/a&gt;\n    &lt;a href=\"#section3\"&gt;\u30bb\u30af\u30b7\u30e7\u30f33\u3078&lt;\/a&gt;\n  &lt;\/nav&gt;\n\n  &lt;!-- \u30b3\u30f3\u30c6\u30f3\u30c4 --&gt;\n  &lt;section id=\"section1\"&gt;\n    &lt;h2&gt;\u30bb\u30af\u30b7\u30e7\u30f31&lt;\/h2&gt;\n    &lt;p&gt;\u3053\u3053\u306f\u30bb\u30af\u30b7\u30e7\u30f31\u306e\u5185\u5bb9\u3067\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"section2\"&gt;\n    &lt;h2&gt;\u30bb\u30af\u30b7\u30e7\u30f32&lt;\/h2&gt;\n    &lt;p&gt;\u3053\u3053\u306f\u30bb\u30af\u30b7\u30e7\u30f32\u306e\u5185\u5bb9\u3067\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"section3\"&gt;\n    &lt;h2&gt;\u30bb\u30af\u30b7\u30e7\u30f33&lt;\/h2&gt;\n    &lt;p&gt;\u3053\u3053\u306f\u30bb\u30af\u30b7\u30e7\u30f33\u306e\u5185\u5bb9\u3067\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u30d6\u30e9\u30a6\u30b6\u3067\u958b\u304d\u3001\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u753b\u9762\u304c\u6ed1\u3089\u304b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u5bfe\u5fdc\u3059\u308b\u30bb\u30af\u30b7\u30e7\u30f3\u3078\u79fb\u52d5\u3057\u307e\u3059\u3002CSS\u306e <code>html { scroll-behavior: smooth; }<\/code> \u306e1\u884c\u304c\u52b9\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">html\u8981\u7d20\u306b\u4ed8\u3051\u308b\u5834\u5408\u3068\u7279\u5b9a\u8981\u7d20\u306b\u4ed8\u3051\u308b\u5834\u5408\u306e\u9055\u3044<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"html\u8981\u7d20\u306b\u4ed8\u3051\u308b\u5834\u5408\u3068\u7279\u5b9a\u8981\u7d20\u306b\u4ed8\u3051\u308b\u5834\u5408\u306e\u9055\u3044\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-02-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>scroll-behavior<\/code> \u306f\u3069\u306e\u8981\u7d20\u306b\u3082\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u52d5\u4f5c\u306e\u7bc4\u56f2\u304c\u5909\u308f\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">html\u8981\u7d20\u306b\u6307\u5b9a\u3059\u308b\u5834\u5408\uff08\u30da\u30fc\u30b8\u5168\u4f53\uff09<\/h3>\n<p class=\"wp-block-paragraph\"><code>html { scroll-behavior: smooth; }<\/code> \u3068\u66f8\u304f\u3068\u3001\u30da\u30fc\u30b8\u5168\u4f53\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff08\u30a6\u30a3\u30f3\u30c9\u30a6\u81ea\u4f53\uff09\u306b\u5bfe\u3057\u3066\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u6709\u52b9\u306b\u306a\u308a\u307e\u3059\u3002\u901a\u5e38\u3001\u30da\u30fc\u30b8\u5185\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3084\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u623b\u308b\u30dc\u30bf\u30f3\u306e\u5b9f\u88c5\u3067\u306f\u3053\u3061\u3089\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u7279\u5b9a\u306e\u8981\u7d20\uff08\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff09\u306b\u6307\u5b9a\u3059\u308b\u5834\u5408<\/h3>\n<p class=\"wp-block-paragraph\">\u9ad8\u3055\u3092\u56fa\u5b9a\u3057\u3066\u5185\u90e8\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u8981\u7d20\uff08\u4f8b\uff1a\u30b5\u30a4\u30c9\u30d0\u30fc\u306e\u76ee\u6b21\u30a8\u30ea\u30a2\u3001\u30e2\u30fc\u30c0\u30eb\u5185\u306e\u30ea\u30b9\u30c8\uff09\u306b\u5bfe\u3057\u3066\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u305d\u306e\u8981\u7d20\u306b\u76f4\u63a5 <code>scroll-behavior: smooth<\/code> \u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u7279\u5b9a\u306e\u8981\u7d20\uff08\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff09\u306b\u306e\u307f\u9069\u7528 *\/\n.scroll-container {\n  scroll-behavior: smooth;\n  overflow-y: scroll;\n  height: 400px;\n}<\/code><\/pre><\/div>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" data-lang=\"HTML\"><code>&lt;div class=\"scroll-container\"&gt;\n  &lt;div id=\"item1\"&gt;\u30a2\u30a4\u30c6\u30e01&lt;\/div&gt;\n  &lt;div id=\"item2\"&gt;\u30a2\u30a4\u30c6\u30e02&lt;\/div&gt;\n  &lt;div id=\"item3\"&gt;\u30a2\u30a4\u30c6\u30e03&lt;\/div&gt;\n&lt;\/div&gt;\n\n&lt;!-- \u30b3\u30f3\u30c6\u30ca\u5185\u3078\u306e\u30ea\u30f3\u30af --&gt;\n&lt;a href=\"#item2\"&gt;\u30a2\u30a4\u30c6\u30e02\u3078\u30b8\u30e3\u30f3\u30d7&lt;\/a&gt;<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3001<code>scroll-behavior<\/code> \u306f\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff08\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u767a\u751f\u3059\u308b\u8981\u7d20\uff09\u306b\u6307\u5b9a\u3059\u308b\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u30da\u30fc\u30b8\u5168\u4f53\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u306a\u3089 <code>html<\/code>\u3001\u7279\u5b9a\u30dc\u30c3\u30af\u30b9\u5185\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u306a\u3089\u305d\u306e\u30dc\u30c3\u30af\u30b9\u8981\u7d20\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u5b9f\u4f8b\uff08\u30b3\u30d4\u30da\u3067\u52d5\u304f\u5b8c\u5168\u30b3\u30fc\u30c9\uff09<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u5b9f\u4f8b\uff08\u30b3\u30d4\u30da\u3067\u52d5\u304f\u5b8c\u5168\u30b3\u30fc\u30c9\uff09\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-03-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306eWeb\u30b5\u30a4\u30c8\u3067\u4f7f\u3048\u308b\u69cb\u6210\u3068\u3057\u3066\u3001\u56fa\u5b9a\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u4ed8\u304d\u306e1\u30da\u30fc\u30b8\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u4f8b\u306b\u3001\u5b8c\u5168\u306aHTML\u30d5\u30a1\u30a4\u30eb\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u3092\u305d\u306e\u307e\u307e\u30b3\u30d4\u30fc\u3057\u3066HTML\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4fdd\u5b58\u3059\u308c\u3070\u3001\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" 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;\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af + \u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb&lt;\/title&gt;\n  &lt;style&gt;\n    \/* \u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u6709\u52b9\u5316 *\/\n    html {\n      scroll-behavior: smooth;\n    }\n\n    body {\n      font-family: sans-serif;\n      margin: 0;\n      padding: 0;\n    }\n\n    \/* \u56fa\u5b9a\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3 *\/\n    nav {\n      position: fixed;\n      top: 0;\n      left: 0;\n      right: 0;\n      background: #333;\n      padding: 12px 20px;\n      display: flex;\n      gap: 20px;\n      z-index: 100;\n    }\n\n    nav a {\n      color: #fff;\n      text-decoration: none;\n      font-size: 14px;\n    }\n\n    nav a:hover {\n      text-decoration: underline;\n    }\n\n    \/* \u30bb\u30af\u30b7\u30e7\u30f3\u5171\u901a *\/\n    section {\n      min-height: 100vh;\n      padding: 100px 40px 40px;\n      border-bottom: 1px solid #ddd;\n    }\n\n    #section1 { background: #f0f8ff; }\n    #section2 { background: #fff8f0; }\n    #section3 { background: #f0fff0; }\n  &lt;\/style&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n  &lt;nav&gt;\n    &lt;a href=\"#section1\"&gt;\u306f\u3058\u3081\u306b&lt;\/a&gt;\n    &lt;a href=\"#section2\"&gt;\u8a73\u7d30\u8aac\u660e&lt;\/a&gt;\n    &lt;a href=\"#section3\"&gt;\u307e\u3068\u3081&lt;\/a&gt;\n  &lt;\/nav&gt;\n\n  &lt;section id=\"section1\"&gt;\n    &lt;h2&gt;\u306f\u3058\u3081\u306b&lt;\/h2&gt;\n    &lt;p&gt;\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u30da\u30fc\u30b8\u306e\u6700\u521d\u306e\u90e8\u5206\u3067\u3059\u3002\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u6ed1\u3089\u304b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u307e\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"section2\"&gt;\n    &lt;h2&gt;\u8a73\u7d30\u8aac\u660e&lt;\/h2&gt;\n    &lt;p&gt;\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u8a73\u7d30\u8aac\u660e\u306e\u30a8\u30ea\u30a2\u3067\u3059\u3002scroll-behavior: smooth; \u3092 html \u8981\u7d20\u306b\u4ed8\u3051\u308b\u3060\u3051\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"section3\"&gt;\n    &lt;h2&gt;\u307e\u3068\u3081&lt;\/h2&gt;\n    &lt;p&gt;CSS\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u308b\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044\u624b\u6cd5\u3067\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30d0\u30fc\u304c\u753b\u9762\u4e0a\u90e8\u306b\u56fa\u5b9a\u3055\u308c\u3066\u304a\u308a\u3001\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u5bfe\u5fdc\u3059\u308b\u30bb\u30af\u30b7\u30e7\u30f3\u3078\u6ed1\u3089\u304b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u307e\u3059\u3002<code>html { scroll-behavior: smooth; }<\/code> \u306e1\u884c\u3060\u3051\u3067\u5b9f\u73fe\u3057\u3066\u3044\u308b\u30b7\u30f3\u30d7\u30eb\u306a\u5b9f\u88c5\u3067\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u898b\u51fa\u3057\u304c\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u306b\u96a0\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">scroll-margin-top \u3067\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u306b\u96a0\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18115-2\"><img alt=\"\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u306b\u96a0\u3055\u306a\u3044\" class=\"wp-image-20912\" decoding=\"async\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-02.jpg\" width=\"1672\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-02.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-02-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-02-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\uff08<code>position: fixed<\/code> \u306e\u30d8\u30c3\u30c0\u30fc\uff09\u304c\u3042\u308b\u30b5\u30a4\u30c8\u3067\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3092\u4f7f\u3046\u3068\u3001\u30b8\u30e3\u30f3\u30d7\u3057\u305f\u5148\u306e\u898b\u51fa\u3057\u304c\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u306b\u96a0\u308c\u3066\u3057\u307e\u3046\u554f\u984c\u304c\u3088\u304f\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304c <code>scroll-margin-top<\/code> \u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u30b8\u30e3\u30f3\u30d7\u5148\u306e\u8981\u7d20\u306b <code>scroll-margin-top<\/code> \u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u4f4d\u7f6e\u306b\u4f59\u767d\u304c\u52a0\u308f\u308a\u3001\u8981\u7d20\u304c\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u3068\u91cd\u306a\u3089\u306a\u3044\u4f4d\u7f6e\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">scroll-margin-top \u306e\u66f8\u304d\u65b9<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u5206\u3060\u3051\u4f59\u767d\u3092\u78ba\u4fdd\u3059\u308b *\/\nsection[id],\nh2[id],\nh3[id] {\n  scroll-margin-top: 80px; \/* \u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055 *\/\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\"><code>80px<\/code> \u306e\u90e8\u5206\u306f\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u306b\u5408\u308f\u305b\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u304c <code>60px<\/code> \u306a\u3089 <code>60px<\/code>\u3001<code>80px<\/code> \u306a\u3089 <code>80px<\/code> \u3068\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5c11\u3057\u5927\u304d\u3081\uff08+10\u301c20px \u7a0b\u5ea6\uff09\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u4f59\u88d5\u304c\u751f\u307e\u308c\u3066\u898b\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc + scroll-margin-top \u306e\u5b8c\u5168\u30b5\u30f3\u30d7\u30eb<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-markup\" 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;style&gt;\n    html {\n      scroll-behavior: smooth;\n    }\n\n    \/* \u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc *\/\n    header {\n      position: fixed;\n      top: 0;\n      left: 0;\n      right: 0;\n      height: 60px;\n      background: #d16176;\n      display: flex;\n      align-items: center;\n      padding: 0 20px;\n      color: #fff;\n      font-weight: bold;\n      z-index: 100;\n    }\n\n    \/* \u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u5206\u30b9\u30af\u30ed\u30fc\u30eb\u4f59\u767d\u3092\u8a2d\u5b9a *\/\n    section {\n      scroll-margin-top: 60px;\n      padding: 40px;\n      min-height: 100vh;\n      border-bottom: 1px solid #ddd;\n    }\n\n    \/* \u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3 *\/\n    nav {\n      margin-top: 60px; \/* \u30d8\u30c3\u30c0\u30fc\u5206\u4e0b\u3052\u308b *\/\n      padding: 20px;\n      background: #f8f8f8;\n    }\n\n    nav a {\n      margin-right: 16px;\n      color: #d16176;\n    }\n  &lt;\/style&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n  &lt;header&gt;\u30b5\u30a4\u30c8\u30ed\u30b4&lt;\/header&gt;\n\n  &lt;nav&gt;\n    &lt;a href=\"#about\"&gt;About&lt;\/a&gt;\n    &lt;a href=\"#service\"&gt;Service&lt;\/a&gt;\n    &lt;a href=\"#contact\"&gt;Contact&lt;\/a&gt;\n  &lt;\/nav&gt;\n\n  &lt;section id=\"about\"&gt;\n    &lt;h2&gt;About&lt;\/h2&gt;\n    &lt;p&gt;\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u304c\u3042\u3063\u3066\u3082\u3001scroll-margin-top \u306e\u304a\u304b\u3052\u3067\u898b\u51fa\u3057\u304c\u96a0\u308c\u307e\u305b\u3093\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"service\"&gt;\n    &lt;h2&gt;Service&lt;\/h2&gt;\n    &lt;p&gt;\u30b8\u30e3\u30f3\u30d7\u5148\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u6b63\u3057\u3044\u4f4d\u7f6e\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n\n  &lt;section id=\"contact\"&gt;\n    &lt;h2&gt;Contact&lt;\/h2&gt;\n    &lt;p&gt;\u3059\u3079\u3066\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u4f59\u767d\u304c\u7d71\u4e00\u3055\u308c\u3066\u3044\u307e\u3059\u3002&lt;\/p&gt;\n  &lt;\/section&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u9ad8\u3055\u304c <code>60px<\/code> \u306a\u306e\u3067 <code>scroll-margin-top: 60px<\/code> \u3092\u5404\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u4e0b\u304e\u308a\u304e\u308a\u304b\u3089\u5404\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u59cb\u307e\u308b\u4f4d\u7f6e\u306b\u6ed1\u3089\u304b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n<p class=\"wp-block-paragraph\"><code>scroll-margin-top<\/code> \u306f\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u4f4d\u7f6e\u306b\u306e\u307f\u5f71\u97ff\u3057\u3001\u901a\u5e38\u306e\u8868\u793a\u30ec\u30a4\u30a2\u30a6\u30c8\u306b\u306f\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u305b\u3093\u3002\u65e2\u5b58\u306e\u30c7\u30b6\u30a4\u30f3\u3092\u5d29\u3055\u305a\u306b\u5c0e\u5165\u3067\u304d\u308b\u306e\u304c\u5229\u70b9\u3067\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">scroll-padding-top \u3068\u306e\u9055\u3044\uff08\u88dc\u8db3\uff09<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"scroll-padding-top \u3068\u306e\u9055\u3044\uff08\u88dc\u8db3\uff09\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-05-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>scroll-margin-top<\/code> \u306b\u4f3c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066 <code>scroll-padding-top<\/code> \u304c\u3042\u308a\u307e\u3059\u30022\u3064\u306e\u9055\u3044\u3092\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d7\u30ed\u30d1\u30c6\u30a3<\/th><th>\u6307\u5b9a\u3059\u308b\u8981\u7d20<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td><code>scroll-margin-top<\/code><\/td><td>\u30b8\u30e3\u30f3\u30d7\u5148\u306e\u8981\u7d20\uff08\u5b50\uff09<\/td><td>\u305d\u306e\u8981\u7d20\u3072\u3068\u3064\u3060\u3051\u306b\u4f59\u767d\u3092\u4ed8\u3051\u308b<\/td><\/tr><tr><td><code>scroll-padding-top<\/code><\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff08\u89aa\uff09<\/td><td>\u30b3\u30f3\u30c6\u30ca\u5168\u4f53\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30b9\u30ca\u30c3\u30d7\u4f4d\u7f6e\u306b\u5f71\u97ff\u3059\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u5bfe\u7b56\u3068\u3057\u3066\u306f\u3001\u500b\u5225\u306e\u8981\u7d20\u306b <code>scroll-margin-top<\/code> \u3092\u8a2d\u5b9a\u3059\u308b\u306e\u304c\u6700\u3082\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3057\u3084\u3059\u3044\u65b9\u6cd5\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u8981\u7d20\u306b\u540c\u3058\u5024\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\uff08<code>html<\/code> \u8981\u7d20\uff09\u306b <code>scroll-padding-top<\/code> \u3092\u4e00\u62ec\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">JavaScript\u306escrollIntoView\u3068\u306e\u6bd4\u8f03\u30fb\u4f7f\u3044\u5206\u3051<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18115-3\"><img alt=\"CSS\u3068JS\u306e\u4f7f\u3044\u5206\u3051\" class=\"wp-image-20913\" decoding=\"async\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-03.jpg\" width=\"1672\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-03.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-03-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-03-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\">CSS\u306e <code>scroll-behavior: smooth<\/code> \u3068\u540c\u3058\u3053\u3068\u3092\u3001JavaScript\u306e <code>scrollIntoView()<\/code> \u30e1\u30bd\u30c3\u30c9\u3067\u3082\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u3001\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">JavaScript\u3067\u306e\u5b9f\u88c5\u4f8b<\/h3>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ JavaScript \u3067\u540c\u3058\u3053\u3068\u3092\u3059\u308b\u5834\u5408\nconst target = document.querySelector('#section2');\n\n\/\/ behavior: 'smooth' \u3067\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\ntarget.scrollIntoView({ behavior: 'smooth', block: 'start' });\n\n\/\/ \u30dc\u30bf\u30f3\u30af\u30ea\u30c3\u30af\u3067\u30b8\u30e3\u30f3\u30d7\u3059\u308b\u4f8b\ndocument.querySelector('#btn').addEventListener('click', () =&gt; {\n  document.querySelector('#target').scrollIntoView({\n    behavior: 'smooth',\n    block: 'start'\n  });\n});<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\"><code>scrollIntoView({ behavior: 'smooth', block: 'start' })<\/code> \u3092\u4f7f\u3048\u3070\u3001JavaScript\u304b\u3089\u3067\u3082\u540c\u69d8\u306e\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u56fa\u5b9a\u30d8\u30c3\u30c0\u30fc\u5bfe\u7b56\u306e <code>scroll-margin-top<\/code> \u306fJavaScript\u7248\u3067\u3082\u6709\u52b9\u306a\u306e\u3067\u3001\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">CSS vs JavaScript \u306e\u4f7f\u3044\u5206\u3051\uff08\u6bd4\u8f03\u8868\uff09<\/h3>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6bd4\u8f03\u9805\u76ee<\/th><th>CSS\uff08scroll-behavior\uff09<\/th><th>JavaScript\uff08scrollIntoView\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u5b9f\u88c5\u306e\u624b\u8efd\u3055<\/td><td>1\u884c\u8ffd\u52a0\u3059\u308b\u3060\u3051<\/td><td>\u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\u3084DOM\u64cd\u4f5c\u304c\u5fc5\u8981<\/td><\/tr><tr><td>\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027<\/td><td>\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb<\/td><td>\u30ed\u30b8\u30c3\u30af\u304c\u5897\u3048\u308b\u3068\u8907\u96d1\u306b\u306a\u308b<\/td><\/tr><tr><td>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u6027<\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u901f\u5ea6\u3092\u7d30\u304b\u304f\u5236\u5fa1\u3067\u304d\u306a\u3044<\/td><td>\u72ec\u81ea\u30a4\u30fc\u30b8\u30f3\u30b0\u3084\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u51e6\u7406\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u5f8c\u306e\u51e6\u7406<\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u5b8c\u4e86\u306e\u691c\u77e5\u304c\u96e3\u3057\u3044<\/td><td>Promise + then() \u3067\u5b8c\u4e86\u5f8c\u306e\u51e6\u7406\u304c\u66f8\u3051\u308b<\/td><\/tr><tr><td>\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc<\/td><td>\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u3067\u5bfe\u5fdc\u6e08\u307f\uff08IE\u975e\u5bfe\u5fdc\uff09<\/td><td>\u540c\u7b49\uff08IE\u3082 <code>behavior<\/code> \u306f\u975e\u5bfe\u5fdc\uff09<\/td><\/tr><tr><td>\u304a\u3059\u3059\u3081\u306e\u5834\u9762<\/td><td>\u30b7\u30f3\u30d7\u30eb\u306a\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u30fb\u30da\u30fc\u30b8\u5185\u79fb\u52d5<\/td><td>SPA\u30fb\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u64cd\u4f5c\u30fb\u5b8c\u4e86\u691c\u77e5\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\"><strong>\u57fa\u672c\u7684\u306b\u306f CSS \u306e <code>scroll-behavior: smooth<\/code> \u3092\u512a\u5148\u7684\u306b\u4f7f\u3046\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/strong> \u7406\u7531\u306f\u3001\u30b3\u30fc\u30c9\u304c\u6700\u5c0f\u9650\u3067\u6e08\u307f\u3001\u4fdd\u5b88\u3057\u3084\u3059\u304f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3082\u5c11\u306a\u3044\u304b\u3089\u3067\u3059\u3002JavaScript\u304c\u5fc5\u8981\u306b\u306a\u308b\u306e\u306f\u3001\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u5b8c\u4e86\u5f8c\u306b\u4f55\u304b\u5225\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3057\u305f\u3044\u300d\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30a4\u30fc\u30b8\u30f3\u30b0\uff08\u52a0\u901f\u30fb\u6e1b\u901f\u306e\u66f2\u7dda\uff09\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u305f\u3044\u300d\u300cReact\u3084Vue\u306a\u3069\u306eSPA\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u79fb\u52d5\u3092\u5236\u5fa1\u3057\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u5834\u5408\u306b\u9650\u5b9a\u3059\u308b\u306e\u304c\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2 class=\"wp-block-heading\">\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1\u3068\u6ce8\u610f\u70b9<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1\u3068\u6ce8\u610f\u70b9\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-07-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\"><code>scroll-behavior<\/code> \u306f\u73fe\u5728\u306e\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u3067\u307b\u307c\u554f\u984c\u306a\u304f\u4f7f\u3048\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3044\u304f\u3064\u304b\u77e5\u3063\u3066\u304a\u304f\u3079\u304d\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u5bfe\u5fdc\u72b6\u6cc1\uff082026\u5e747\u6708\u73fe\u5728\uff09<\/h3>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d6\u30e9\u30a6\u30b6<\/th><th>\u5bfe\u5fdc\u72b6\u6cc1<\/th><th>\u5099\u8003<\/th><\/tr><\/thead><tbody><tr><td>Chrome\uff08\u6700\u65b0\uff09<\/td><td>\u5bfe\u5fdc<\/td><td>\u554f\u984c\u306a\u3057<\/td><\/tr><tr><td>Firefox\uff08\u6700\u65b0\uff09<\/td><td>\u5bfe\u5fdc<\/td><td>\u554f\u984c\u306a\u3057<\/td><\/tr><tr><td>Safari\uff08\u6700\u65b0\uff09<\/td><td>\u5bfe\u5fdc<\/td><td>iOS Safari\u3082\u5bfe\u5fdc\u6e08\u307f<\/td><\/tr><tr><td>Edge\uff08\u6700\u65b0\uff09<\/td><td>\u5bfe\u5fdc<\/td><td>\u554f\u984c\u306a\u3057<\/td><\/tr><tr><td>Internet Explorer<\/td><td>\u975e\u5bfe\u5fdc<\/td><td>2022\u5e74\u306b\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3002\u73fe\u5728\u306f\u8003\u616e\u4e0d\u8981<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">2026\u5e74\u73fe\u5728\u3001Internet Explorer \u306f\u30de\u30a4\u30af\u30ed\u30bd\u30d5\u30c8\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u4e86\u3057\u3066\u304a\u308a\u3001\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u3068\u3057\u3066\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u306f\u307b\u307c\u3042\u308a\u307e\u305b\u3093\u3002\u4e0a\u8a18\u306e\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u3066\u3044\u308c\u3070\u3001\u5b9f\u52d9\u3067\u306e\u4f7f\u7528\u306b\u554f\u984c\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\uff1aprefers-reduced-motion \u3078\u306e\u5bfe\u5fdc<\/h3>\n<p class=\"wp-block-paragraph\">\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u76ee\u306e\u75b2\u308c\u3084\u4e09\u534a\u898f\u7ba1\u306e\u554f\u984c\u304b\u3089\u3001\u753b\u9762\u4e0a\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3084\u30b9\u30af\u30ed\u30fc\u30eb\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u82e6\u624b\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002OS\u306e\u300c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u8efd\u6e1b\u300d\u8a2d\u5b9a\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u3001\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b\u306e\u304c\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u4e0a\u306e\u914d\u616e\u3068\u3057\u3066\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\uff1a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u8efd\u6e1b\u8a2d\u5b9a\u3092\u5c0a\u91cd\u3059\u308b *\/\n@media (prefers-reduced-motion: reduce) {\n  html {\n    scroll-behavior: auto; \/* \u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u7121\u52b9\u5316 *\/\n  }\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\"><code>prefers-reduced-motion: reduce<\/code> \u306e\u30e1\u30c7\u30a3\u30a2\u30af\u30a8\u30ea\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u8efd\u6e1b\u8a2d\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u5373\u6642\u30b9\u30af\u30ed\u30fc\u30eb\u3001\u901a\u5e38\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3068\u4f7f\u3044\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">\u52b9\u304b\u306a\u3044\u30fb\u52d5\u304b\u306a\u3044\u3068\u304d\u306e\u3088\u304f\u3042\u308b\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5<\/h2>\n<figure class=\"wp-block-image size-large\" data-dia=\"18115-4\"><img alt=\"\u52d5\u304b\u306a\u3044\u6642\u306e\u78ba\u8a8d\" class=\"wp-image-20914\" decoding=\"async\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-04.jpg\" width=\"1672\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-04.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-04-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-section-04-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n<p class=\"wp-block-paragraph\"><code>scroll-behavior: smooth<\/code> \u3092\u8ffd\u52a0\u3057\u305f\u306e\u306b\u52d5\u304b\u306a\u3044\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u5178\u578b\u7684\u306a\u539f\u56e0\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u3064\u305a\u3064\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u539f\u56e01\uff1aoverflow: hidden \u3084 overflow: scroll \u306e\u8a2d\u5b9a\u304c\u5f71\u97ff\u3057\u3066\u3044\u308b<\/h3>\n<p class=\"wp-block-paragraph\">\u6700\u3082\u591a\u3044\u539f\u56e0\u306e\u3072\u3068\u3064\u304c\u3001<code>html<\/code> \u3084 <code>body<\/code> \u8981\u7d20\u306b <code>overflow: hidden<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u81ea\u4f53\u304c\u7121\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081 <code>scroll-behavior<\/code> \u3082\u6a5f\u80fd\u3057\u307e\u305b\u3093\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* \u6ce8\u610f\uff1aoverflow: hidden \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u52b9\u304b\u306a\u3044\u5834\u5408\u304c\u3042\u308b *\/\n\n\/* \u60aa\u3044\u4f8b\uff08\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u52b9\u304b\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\uff09 *\/\nhtml, body {\n  overflow: hidden; \/* \u3053\u308c\u304c\u3042\u308b\u3068\u30b9\u30af\u30ed\u30fc\u30eb\u81ea\u4f53\u304c\u7121\u52b9\u306b\u306a\u308b *\/\n}\n\n\/* \u826f\u3044\u4f8b *\/\nhtml {\n  scroll-behavior: smooth;\n}\n\nbody {\n  \/* overflow \u306f\u7279\u306b\u6307\u5b9a\u3057\u306a\u3044\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u307e\u307e\uff09 *\/\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u30d6\u30e9\u30a6\u30b6\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\uff08DevTools\uff09\u3067\u30da\u30fc\u30b8\u306e <code>html<\/code> \u3084 <code>body<\/code> \u8981\u7d20\u306e Computed \u30b9\u30bf\u30a4\u30eb\u3092\u78ba\u8a8d\u3057\u3001<code>overflow<\/code> \u306e\u5024\u3092\u8abf\u3079\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u539f\u56e02\uff1aid \u5c5e\u6027\u304c\u30ea\u30f3\u30af\u5148\u8981\u7d20\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044<\/h3>\n<p class=\"wp-block-paragraph\">\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af <code>&lt;a href=\"#section1\"&gt;<\/code> \u3092\u4f7f\u3046\u5834\u5408\u3001\u30ea\u30f3\u30af\u5148\u306b <code>id=\"section1\"<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u30b8\u30e3\u30f3\u30d7\u81ea\u4f53\u304c\u6a5f\u80fd\u3057\u307e\u305b\u3093\u3002\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u4ee5\u524d\u306e\u554f\u984c\u306a\u306e\u3067\u3001\u307e\u305a HTML \u69cb\u9020\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u539f\u56e03\uff1ascroll-behavior \u304c\u4e0a\u66f8\u304d\u3055\u308c\u3066\u3044\u308b<\/h3>\n<p class=\"wp-block-paragraph\">CSS\u306e\u8a73\u7d30\u5ea6\uff08\u30b9\u30da\u30b7\u30d5\u30a3\u30b7\u30c6\u30a3\uff09\u3084\u8aad\u307f\u8fbc\u307f\u9806\u5e8f\u306e\u554f\u984c\u3067\u3001\u5f8c\u304b\u3089\u8aad\u307f\u8fbc\u307e\u308c\u308bCSS\u30d5\u30a1\u30a4\u30eb\u304c <code>scroll-behavior: auto<\/code> \u3092\u4e0a\u66f8\u304d\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u958b\u767a\u8005\u30c4\u30fc\u30eb\u306e Styles \u30d1\u30cd\u30eb\u3067 <code>scroll-behavior<\/code> \u306e\u5024\u3092\u78ba\u8a8d\u3057\u3001\u6253\u3061\u6d88\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u539f\u56e04\uff1aJavaScript\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u52d5\u4f5c\u3092\u59a8\u3052\u3066\u3044\u308b<\/h3>\n<p class=\"wp-block-paragraph\">\u65e2\u5b58\u306eJavaScript\u304c <code>addEventListener('click', e =&gt; e.preventDefault())<\/code> \u306a\u3069\u3067\u30ea\u30f3\u30af\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u52d5\u4f5c\uff08\u30da\u30fc\u30b8\u5185\u30b8\u30e3\u30f3\u30d7\uff09\u3092\u7121\u52b9\u5316\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3082\u52d5\u304d\u307e\u305b\u3093\u3002\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3001\u65e2\u5b58\u30b9\u30af\u30ea\u30d7\u30c8\u3068\u7af6\u5408\u3057\u3066\u3044\u306a\u3044\u304b\u8abf\u3079\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 class=\"wp-block-heading\">\u539f\u56e05\uff1aSafari \u3067\u306e\u52d5\u4f5c\u78ba\u8a8d<\/h3>\n<p class=\"wp-block-paragraph\">\u6bd4\u8f03\u7684\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eSafari\u3067\u306f <code>scroll-behavior<\/code> \u304c\u5b8c\u5168\u306b\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002Safari 15.4 \u4ee5\u964d\u3067\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u5bfe\u8c61\u30e6\u30fc\u30b6\u30fc\u306eSafari\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002iOS \u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f\u53e4\u3044Safari\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">:target \u30bb\u30ec\u30af\u30bf\u30fc\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\":target \u30bb\u30ec\u30af\u30bf\u30fc\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u30b9\u30bf\u30a4\u30ea\u30f3\u30b0\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-09-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u30b8\u30e3\u30f3\u30d7\u3057\u305f\u5148\u306e\u8981\u7d20\u3092\u8996\u899a\u7684\u306b\u30cf\u30a4\u30e9\u30a4\u30c8\u3059\u308b\u5834\u5408\u3001CSS\u306e <code>:target<\/code> \u7591\u4f3c\u30af\u30e9\u30b9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* :target \u30bb\u30ec\u30af\u30bf\u30fc\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u30b9\u30bf\u30a4\u30eb\u3092\u5f53\u3066\u308b\u4f8b *\/\nsection:target {\n  background-color: #fffde7;\n  outline: 2px solid #d16176;\n  outline-offset: 4px;\n  transition: background-color 0.5s ease;\n}<\/code><\/pre><\/div>\n<p class=\"wp-block-paragraph\">\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u7279\u5b9a\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u30b8\u30e3\u30f3\u30d7\u3057\u305f\u3068\u304d\u3001\u305d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u4e00\u6642\u7684\u306b\u30cf\u30a4\u30e9\u30a4\u30c8\u3055\u308c\u308b\u3088\u3046\u306a\u8996\u899a\u7684\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u52a0\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u3053\u3053\u306b\u6765\u305f\u300d\u3068\u308f\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<code>scroll-behavior: smooth<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u6ed1\u3089\u304b\u306b\u79fb\u52d5\u3057\u306a\u304c\u3089\u76ee\u7684\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u308f\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-10-v2.jpg\"\/><\/figure>\n<h3 class=\"wp-block-heading\">Q1. scroll-behavior: smooth \u306fbody\u8981\u7d20\u306b\u4ed8\u3051\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> \u4e00\u822c\u7684\u306b\u306f <code>html<\/code> \u8981\u7d20\u306b\u4ed8\u3051\u308b\u306e\u304c\u63a8\u5968\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u306f <code>body<\/code> \u306b\u4ed8\u3051\u3066\u3082\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u4ed5\u69d8\u4e0a\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306f <code>html<\/code> \u8981\u7d20\u3067\u3059\u3002<code>html { scroll-behavior: smooth; }<\/code> \u3068\u66f8\u304f\u306e\u304c\u6700\u3082\u78ba\u5b9f\u3067\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q2. \u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u901f\u5ea6\u3092\u5909\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> CSS \u306e <code>scroll-behavior: smooth<\/code> \u3067\u306f\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u901f\u5ea6\u3084\u30a4\u30fc\u30b8\u30f3\u30b0\u3092CSS\u3060\u3051\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u901f\u5ea6\u3092\u7d30\u304b\u304f\u5236\u5fa1\u3057\u305f\u3044\u5834\u5408\u306f\u3001JavaScript\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\uff08\u4f8b\uff1a<a href=\"https:\/\/greensock.com\/gsap\/\">GSAP<\/a>\uff09\u3084\u3001<code>scrollTo()<\/code> \u306b\u72ec\u81ea\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u65b9\u6cd5\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q3. \u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u623b\u308b\u30dc\u30bf\u30f3\u306b\u3082\u9069\u7528\u3055\u308c\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> \u306f\u3044\u3001\u9069\u7528\u3055\u308c\u307e\u3059\u3002<code>&lt;a href=\"#\"&gt;\u30c8\u30c3\u30d7\u3078&lt;\/a&gt;<\/code> \u3084 <code>&lt;a href=\"#top\"&gt;\u30c8\u30c3\u30d7\u3078&lt;\/a&gt;<\/code> \u306e\u3088\u3046\u306b\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u5b9f\u88c5\u3055\u308c\u305f\u300c\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u623b\u308b\u300d\u30dc\u30bf\u30f3\u3082\u3001<code>scroll-behavior: smooth<\/code> \u306e\u6069\u6075\u3092\u53d7\u3051\u307e\u3059\u3002JavaScript \u3067\u5b9f\u88c5\u3057\u305f\u5834\u5408\u306f\u5225\u9014 <code>scrollIntoView()<\/code> \u3084 <code>scrollTo({ behavior: 'smooth' })<\/code> \u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q4. WordPress\u3067\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> WordPress\u306e\u5834\u5408\u3001\u30c6\u30fc\u30de\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30b6\u30fc\u300c\u8ffd\u52a0CSS\u300d\u306b <code>html { scroll-behavior: smooth; }<\/code> \u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4e00\u90e8\u306eWordPress\u30c6\u30fc\u30de\u3084\u30d7\u30e9\u30b0\u30a4\u30f3\u304cJavaScript\u3067\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u52d5\u4f5c\u3092\u4e0a\u66f8\u304d\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u969b\u306f\u3001\u30c6\u30fc\u30de\u306e\u8a2d\u5b9a\u306b\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3001\u7af6\u5408\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u7121\u52b9\u5316\u3059\u308b\u5bfe\u5fdc\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 class=\"wp-block-heading\">Q5. React\u306a\u3069\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3082\u540c\u3058\u65b9\u6cd5\u3067\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n<p class=\"wp-block-paragraph\"><strong>A.<\/strong> CSS\u306e <code>scroll-behavior: smooth<\/code> \u81ea\u4f53\u306f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u4f9d\u5b58\u3057\u306a\u3044\u305f\u3081\u3001React\u3084Vue\u3001Next.js \u306a\u3069\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u3001\u30b0\u30ed\u30fc\u30d0\u30ebCSS\u306b <code>html { scroll-behavior: smooth; }<\/code> \u3092\u8ffd\u52a0\u3059\u308c\u3070\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001Next.js\u306e\u30eb\u30fc\u30bf\u30fc\u3084 React Router \u306a\u3069\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u4f7f\u3046\u5834\u5408\u306f\u30cf\u30c3\u30b7\u30e5\u30ea\u30f3\u30af\u306e\u52d5\u4f5c\u304c\u7570\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f <a href=\"https:\/\/www.npmjs.com\/package\/react-scroll\">react-scroll<\/a> \u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<!-- withmedia-related -->\n\n<!-- withmedia-faq-schema -->\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"scroll-behavior: smooth \u306fbody\u8981\u7d20\u306b\u4ed8\u3051\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"\u4e00\u822c\u7684\u306b\u306f html \u8981\u7d20\u306b\u4ed8\u3051\u308b\u306e\u304c\u63a8\u5968\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u306f body \u306b\u4ed8\u3051\u3066\u3082\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u4ed5\u69d8\u4e0a\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u30b3\u30f3\u30c6\u30ca\u306f html \u8981\u7d20\u3067\u3059\u3002html { scroll-behavior: smooth; } \u3068\u66f8\u304f\u306e\u304c\u6700\u3082\u78ba\u5b9f\u3067\u3059\u3002\"}}, {\"@type\": \"Question\", \"name\": \"\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u901f\u5ea6\u3092\u5909\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304b\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"CSS \u306e scroll-behavior: smooth \u3067\u306f\u3001\u30b9\u30af\u30ed\u30fc\u30eb\u901f\u5ea6\u3084\u30a4\u30fc\u30b8\u30f3\u30b0\u3092CSS\u3060\u3051\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u901f\u5ea6\u3092\u7d30\u304b\u304f\u5236\u5fa1\u3057\u305f\u3044\u5834\u5408\u306f\u3001JavaScript\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\uff08\u4f8b\uff1aGSAP\uff09\u3084\u3001scrollTo() \u306b\u72ec\u81ea\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u65b9\u6cd5\u3092\u4f7f\u3044\u307e\u3059\u3002\"}}, {\"@type\": \"Question\", \"name\": \"\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u623b\u308b\u30dc\u30bf\u30f3\u306b\u3082\u9069\u7528\u3055\u308c\u307e\u3059\u304b\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"\u306f\u3044\u3001\u9069\u7528\u3055\u308c\u307e\u3059\u3002<a href=\\\"#\\\">\u30c8\u30c3\u30d7\u3078<\/a> \u3084 <a href=\\\"#top\\\">\u30c8\u30c3\u30d7\u3078<\/a> \u306e\u3088\u3046\u306b\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u3067\u5b9f\u88c5\u3055\u308c\u305f\u300c\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078\u623b\u308b\u300d\u30dc\u30bf\u30f3\u3082\u3001scroll-behavior: smooth \u306e\u6069\u6075\u3092\u53d7\u3051\u307e\u3059\u3002JavaScript \u3067\u5b9f\u88c5\u3057\u305f\u5834\u5408\u306f\u5225\u9014 scrollIntoView() \u3084 scrollTo({ behavior: 'smooth' }) \u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\"}}, {\"@type\": \"Question\", \"name\": \"WordPress\u3067\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"WordPress\u306e\u5834\u5408\u3001\u30c6\u30fc\u30de\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30b6\u30fc\u300c\u8ffd\u52a0CSS\u300d\u306b html { scroll-behavior: smooth; } \u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4e00\u90e8\u306eWordPress\u30c6\u30fc\u30de\u3084\u30d7\u30e9\u30b0\u30a4\u30f3\u304cJavaScript\u3067\u30a2\u30f3\u30ab\u30fc\u30ea\u30f3\u30af\u306e\u52d5\u4f5c\u3092\u4e0a\u66f8\u304d\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u969b\u306f\u3001\u30c6\u30fc\u30de\u306e\u8a2d\u5b9a\u306b\u30b9\u30e0\u30fc\u30b9\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3001\u7af6\u5408\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u7121\u52b9\u5316\u3059\u308b\u5bfe\u5fdc\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\"}}, {\"@type\": \"Question\", \"name\": \"React\u306a\u3069\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3082\u540c\u3058\u65b9\u6cd5\u3067\u3067\u304d\u307e\u3059\u304b\uff1f\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"CSS\u306e scroll-behavior: smooth \u81ea\u4f53\u306f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u4f9d\u5b58\u3057\u306a\u3044\u305f\u3081\u3001React\u3084Vue\u3001Next.js \u306a\u3069\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u3001\u30b0\u30ed\u30fc\u30d0\u30ebCSS\u306b html { scroll-behavior: smooth; } \u3092\u8ffd\u52a0\u3059\u308c\u3070\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001Next.js\u306e\u30eb\u30fc\u30bf\u30fc\u3084 React Router \u306a\u3069\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u4f7f\u3046\u5834\u5408\u306f\u30cf\u30c3\u30b7\u30e5\u30ea\u30f3\u30af\u306e\u52d5\u4f5c\u304c\u7570\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f react-scroll \u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\"}}]}<\/script>\n\n<h2 class=\"wp-block-heading\">\u95a2\u9023\u8a18\u4e8b<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"\u95a2\u9023\u8a18\u4e8b\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-11-v2.jpg\"\/><\/figure>\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-scroll-snap\/\">scroll-snap\u3067\u4f5c\u308b\u6a2a\u30b9\u30af\u30ed\u30fc\u30ebUI\uff5c\u30ab\u30eb\u30fc\u30bb\u30eb\u3092CSS\u3060\u3051\u3067\u5b9f\u88c5<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-scroll\/\">CSS\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30102026\u5e74\u7248\u3011JavaScript\u4e0d\u8981\u306e\u5b9f\u88c5\u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/parallax-effect\/\">\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<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-position-sticky\/\">\u30102026\u5e74\u7248\u3011position: sticky\u3067\u8ffd\u5f93\u3055\u305b\u308b\u65b9\u6cd5\uff5c\u30d8\u30c3\u30c0\u30fc\u30fb\u76ee\u6b21\u30fb\u8868\u3092\u56fa\u5b9a<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-animation-rotation\/\">CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u56de\u8ee2\u3092\u5b8c\u5168\u30ac\u30a4\u30c9|\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067<\/a><\/li>\n<li><a href=\"https:\/\/withcode.tech\/media\/css-modern-ui-components-30\/\">\u3010\u30b3\u30d4\u30da\u53ef\u3011CSS\u3060\u3051\u3067\u4f5c\u308b\u30e2\u30c0\u30f3UI\u30d1\u30fc\u30c430\u9078\uff5c\u5b9f\u88c5\u30b3\u30fc\u30c9\u5168\u90e8\u8f09\u305b<\/a><\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"CSS\u30fbWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u306e\u7dcf\u307e\u3068\u3081\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/css-smooth-scroll-12-v2.jpg\"\/><\/figure>\n<p class=\"wp-block-paragraph\">CSS\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u300c\u30ec\u30a4\u30a2\u30a6\u30c8\u30fb\u88c5\u98fe\u30fb\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30fb\u57fa\u790e\u30fb\u30c8\u30e9\u30d6\u30eb\u89e3\u6c7a\u300d\u306e\u76ee\u7684\u5225\u306b\u63a2\u305b\u308b\u7dcf\u307e\u3068\u3081\u30da\u30fc\u30b8\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u88c5\u3067\u8ff7\u3063\u305f\u3068\u304d\u306e\u7d22\u5f15\u3068\u3057\u3066\u3069\u3046\u305e\u3002<\/p>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/withcode.tech\/media\/css-webdesign-technique-map\/\">\u3010CSS\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u5b8c\u5168\u30de\u30c3\u30d7\u3011\u30b3\u30d4\u30da\u3067\u4f7f\u3048\u308bWeb\u30c7\u30b6\u30a4\u30f3\u5b9f\u88c5\u30ac\u30a4\u30c9\u7dcf\u307e\u3068\u3081<\/a><\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">AI\u30b9\u30ad\u30eb\u3067\u3001\u672a\u6765\u306e\u81ea\u5206\u3092\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\uff01<\/h2>\n<figure class=\"wp-block-image aligncenter size-large\"><a href=\"https:\/\/s.lmes.jp\/landing-qr\/2010578884-C5To3Fmv?uLand=phzKXf\" rel=\"noopener noreferrer\" target=\"_blank\"><img decoding=\"async\" width=\"1254\" height=\"1254\" alt=\"\u4eca\u306a\u3089\u5b8c\u5168\u7121\u6599\u3067AI\u3092\u5b66\u3079\u308b\uff01WithAI\" class=\"wp-image-18841\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner.jpg\" style=\"max-width:600px;width:100%;height:auto\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner.jpg 1254w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/07\/withai-cta-banner-768x768.jpg 768w\" sizes=\"(max-width: 1254px) 100vw, 1254px\" \/><\/a><\/figure>\n<h3 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