{"id":21890,"date":"2024-03-16T18:05:18","date_gmt":"2024-03-16T09:05:18","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/javascript%e3%81%a7%e3%83%9a%e3%83%bc%e3%82%b8%e3%83%88%e3%83%83%e3%83%97%e3%81%ab%e6%88%bb%e3%82%8b%e3%81%9f%e3%82%81%e3%81%ae5%e3%81%a4%e3%81%ae%e6%96%b9%e6%b3%95%ef%bc%88%e5%ae%9f%e8%a3%85%e3%81%8b\/"},"modified":"2025-08-07T08:36:22","modified_gmt":"2025-08-06T23:36:22","slug":"javascript%e3%81%a7%e3%83%9a%e3%83%bc%e3%82%b8%e3%83%88%e3%83%83%e3%83%97%e3%81%ab%e6%88%bb%e3%82%8b%e3%81%9f%e3%82%81%e3%81%ae5%e3%81%a4%e3%81%ae%e6%96%b9%e6%b3%95%ef%bc%88%e5%ae%9f%e8%a3%85%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/javascript%e3%81%a7%e3%83%9a%e3%83%bc%e3%82%b8%e3%83%88%e3%83%83%e3%83%97%e3%81%ab%e6%88%bb%e3%82%8b%e3%81%9f%e3%82%81%e3%81%ae5%e3%81%a4%e3%81%ae%e6%96%b9%e6%b3%95%ef%bc%88%e5%ae%9f%e8%a3%85%e3%81%8b\/","title":{"rendered":"JavaScript\u3067\u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u306b\u623b\u308b\u305f\u3081\u306e5\u3064\u306e\u65b9\u6cd5\uff08\u5b9f\u88c5\u304b\u3089\u5f37\u5316\u307e\u3067\uff09"},"content":{"rendered":"<ol>\n<li>window.scrollTo\u30e1\u30bd\u30c3\u30c9\u3084document.documentElement.scrollTop\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u73fe\u3059\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">scrollToTop<\/span>() {\r\n  <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">scrollTo<\/span>(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>);\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u300cwindow.scrollTo\u30e1\u30bd\u30c3\u30c9\u3068requestAnimationFrame\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u52b9\u679c\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u300d<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">smoothScrollToTop<\/span>() {\r\n  <span class=\"hljs-keyword\">const<\/span> currentScroll = <span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-property\">documentElement<\/span>.<span class=\"hljs-property\">scrollTop<\/span> || <span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-property\">body<\/span>.<span class=\"hljs-property\">scrollTop<\/span>;\r\n  <span class=\"hljs-keyword\">if<\/span> (currentScroll &gt; <span class=\"hljs-number\">0<\/span>) {\r\n    <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">requestAnimationFrame<\/span>(smoothScrollToTop);\r\n    <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">scrollTo<\/span>(<span class=\"hljs-number\">0<\/span>, currentScroll - (currentScroll \/ <span class=\"hljs-number\">8<\/span>));\r\n  }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u6307\u5b9a\u3055\u308c\u305f\u8981\u7d20\u306e\u30c8\u30c3\u30d7\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u305f\u3081\u306b\u3001scrollIntoView\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">scrollToElementTop<\/span>(<span class=\"hljs-params\">element<\/span>) {\r\n  element.<span class=\"hljs-title function_\">scrollIntoView<\/span>({ <span class=\"hljs-attr\">behavior<\/span>: <span class=\"hljs-string\">'smooth'<\/span>, <span class=\"hljs-attr\">block<\/span>: <span class=\"hljs-string\">'start'<\/span> });\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u30a2\u30cb\u30e1\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b9\u30e0\u30fc\u30ba\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u52b9\u679c\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">animateScrollToTop<\/span>(<span class=\"hljs-params\">duration<\/span>) {\r\n  <span class=\"hljs-keyword\">const<\/span> start = <span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-property\">documentElement<\/span>.<span class=\"hljs-property\">scrollTop<\/span> || <span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-property\">body<\/span>.<span class=\"hljs-property\">scrollTop<\/span>;\r\n  <span class=\"hljs-keyword\">const<\/span> target = <span class=\"hljs-number\">0<\/span>;\r\n  <span class=\"hljs-keyword\">const<\/span> distance = target - start;\r\n  <span class=\"hljs-keyword\">const<\/span> startTime = performance.<span class=\"hljs-title function_\">now<\/span>();\r\n  \r\n  <span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">step<\/span>() {\r\n    <span class=\"hljs-keyword\">const<\/span> currentTime = performance.<span class=\"hljs-title function_\">now<\/span>();\r\n    <span class=\"hljs-keyword\">const<\/span> elapsed = currentTime - startTime;\r\n    <span class=\"hljs-keyword\">const<\/span> progress = <span class=\"hljs-title class_\">Math<\/span>.<span class=\"hljs-title function_\">min<\/span>(elapsed \/ duration, <span class=\"hljs-number\">1<\/span>);\r\n    <span class=\"hljs-keyword\">const<\/span> easing = <span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">t<\/span>) { <span class=\"hljs-keyword\">return<\/span> t * (<span class=\"hljs-number\">2<\/span> - t); }; <span class=\"hljs-comment\">\/\/ \u7f13\u52a8\u51fd\u6570\uff0c\u4f8b\u5982\u4f7f\u7528\u4e8c\u6b21\u65b9\u51fd\u6570<\/span>\r\n    <span class=\"hljs-keyword\">const<\/span> position = start + distance * <span class=\"hljs-title function_\">easing<\/span>(progress);\r\n    \r\n    <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">scrollTo<\/span>(<span class=\"hljs-number\">0<\/span>, position);\r\n    \r\n    <span class=\"hljs-keyword\">if<\/span> (progress &lt; <span class=\"hljs-number\">1<\/span>) {\r\n      <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">requestAnimationFrame<\/span>(step);\r\n    }\r\n  }\r\n  \r\n  <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">requestAnimationFrame<\/span>(step);\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u5f37\u5316\u7248\uff1a\u30dc\u30bf\u30f3\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u3001\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u3092\u7d50\u3073\u3064\u3051\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">button<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\">\"scrollToTopBtn\"<\/span>&gt;<\/span>\u56de\u5230\u9876\u90e8<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">button<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-title function_\">getElementById<\/span>(<span class=\"hljs-string\">'scrollToTopBtn'<\/span>).<span class=\"hljs-title function_\">addEventListener<\/span>(<span class=\"hljs-string\">'click'<\/span>, scrollToTop);\r\n\r\n<span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">scrollToTop<\/span>() {\r\n  <span class=\"hljs-variable language_\">window<\/span>.<span class=\"hljs-title function_\">scrollTo<\/span>({ <span class=\"hljs-attr\">top<\/span>: <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-attr\">behavior<\/span>: <span class=\"hljs-string\">'smooth'<\/span> });\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u308c\u306f\u3001\u30da\u30fc\u30b8\u306e\u30c8\u30c3\u30d7\u306b\u623b\u308b\u305f\u3081\u306e\u4e00\u822c\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u306e5\u3064\u306e\u4f8b\u3067\u3059\u3002\u6700\u3082\u57fa\u672c\u7684\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u304b\u3089\u30c8\u30c3\u30d7\u3078\u306e\u65b9\u6cd5\u304b\u3089\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u52b9\u679c\u3084\u30dc\u30bf\u30f3\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u304c\u8ffd\u52a0\u3055\u308c\u305f\u9ad8\u5ea6\u306a\u65b9\u6cd5\u307e\u3067\u3042\u308a\u307e\u3059\u3002\u7279\u5b9a\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u3001\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3066\u30da\u30fc\u30b8\u306e\u30c8\u30c3\u30d7\u306b\u623b\u308b\u6a5f\u80fd\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>window.scrollTo\u30e1\u30bd\u30c3\u30c9\u3084document.documentElement.scrollTop\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u73fe\u3059\u308b\u3002 function scrollToTop() { window.scrollTo [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[56,26],"class_list":["post-21890","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-javascript","tag-26"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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