{"id":9214,"date":"2025-10-10T13:29:58","date_gmt":"2025-10-10T04:29:58","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9214"},"modified":"2025-10-10T13:30:08","modified_gmt":"2025-10-10T04:30:08","slug":"cta%e3%81%af%e8%aa%ad%e3%81%bf%e7%b5%82%e3%82%8f%e3%82%8a%e3%81%a7%e5%85%89%e3%82%8b-%e2%94%80-%e8%a8%98%e4%ba%8b%e3%81%ae%e6%9c%80%e5%be%8c%e3%81%ab%e5%85%89%e3%82%8b%e3%82%a2%e3%83%8b%e3%83%a1","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/webdesign\/cta%e3%81%af%e8%aa%ad%e3%81%bf%e7%b5%82%e3%82%8f%e3%82%8a%e3%81%a7%e5%85%89%e3%82%8b-%e2%94%80-%e8%a8%98%e4%ba%8b%e3%81%ae%e6%9c%80%e5%be%8c%e3%81%ab%e5%85%89%e3%82%8b%e3%82%a2%e3%83%8b%e3%83%a1\/","title":{"rendered":"CTA\u306f\u8aad\u307f\u7d42\u308f\u308a\u3067\u5149\u308b \u2500 \u8a18\u4e8b\u306e\u6700\u5f8c\u306b\u5149\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3"},"content":{"rendered":"<div class=\"the_content\">\n<p>\u3053\u3093\u306b\u3061\u306f\u3001Web\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u306eBigVi\u3067\u3059\u3002\u4eca\u56de\u3082\u79c1\u304c\u5bfe\u5fdc\u3057\u305f\u30d6\u30ed\u30b0\u30b5\u30a4\u30c8\u5236\u4f5c\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f8b\u3092\u66f8\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u79c1\u304c\u5bfe\u5fdc\u3057\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u591a\u304f\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u3044\u308b\u3051\u3069\u3001\u305d\u3053\u304b\u3089\u304a\u554f\u5408\u305b\u30da\u30fc\u30b8\u30ea\u30f3\u30af\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u554f\u984c\u3067\u3057\u305f\u3002\u304a\u554f\u3044\u5408\u308f\u305b\u30da\u30fc\u30b8\u3078\u306e\u30ea\u30f3\u30af\u306f\u3061\u3083\u3093\u3068\u3042\u308a\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u79c1\u306f\u3001\u300c\u8a18\u4e8b\u306e\u6700\u5f8c\u304c\u898b\u3048\u305f\u3068\u304d\u306b\u5c11\u3057\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u3059\u308b\u300d\u4ed5\u639b\u3051\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u305f\u3002\u4eca\u56de\u306f\u3001<strong>CTA\uff08Call to Action\uff09\u3092\u8aad\u307f\u7d42\u308f\u308a\u3067\u5149\u3089\u305b\u308b\u5c0f\u3055\u306a\u30c8\u30ea\u30ac\u30fc\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/strong>\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u76ee\u7acb\u305f\u306a\u3044\u304a\u554f\u5408\u305b\u30dc\u30bf\u30f3<\/h2>\n\n\n\n<p>\u666e\u901a\u306e\u304a\u554f\u5408\u305b\u30dc\u30bf\u30f3\uff08CTA\u30dc\u30bf\u30f3\uff09\u306f\u3001\u8a18\u4e8b\u306e\u4e0b\u306b\u7f6e\u304b\u308c\u3066\u3044\u3066\u3082\u898b\u843d\u3068\u3059\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u7279\u306b\u3001\u9759\u7684\u306a\u8981\u7d20\u3060\u3068\u8a18\u4e8b\u306b\u96c6\u4e2d\u3057\u3066\u3044\u308b\u306e\u3067\u898b\u3048\u3066\u3044\u307e\u305b\u3093\u3002\u3067\u3082\u3001\u8aad\u307f\u7d42\u308f\u308b\u6642\u306b\u5c11\u3057\u5149\u308b\u3001\u307e\u305f\u306f\u52d5\u304f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u5165\u308b\u3068\u3001\u307f\u3093\u306a\u5fc5\u305a\u307f\u307e\u3059\u3002\u5f37\u5236\u7684\u3067\u306f\u306a\u3044\u3051\u3069\u3001\u300c\u3042\u3001\u6b21\u306f\u3053\u308c\u3092\u62bc\u3059\u304b\u306a\u300d\u3068\u601d\u308f\u305b\u308b\u3093\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u88c5\u306e\u57fa\u672c\u30a2\u30a4\u30c7\u30a2<\/h2>\n\n\n\n<p>\u3053\u306e\u4ed5\u639b\u3051\u306f\u3001JavaScript\u306e<code>IntersectionObserver<\/code>\u3092\u4f7f\u3063\u3066\u3001<strong>\u30e6\u30fc\u30b6\u30fc\u304c\u8a18\u4e8b\u306e\u6700\u5f8c\u306b\u5230\u9054\u3057\u305f\u77ac\u9593<\/strong>\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u305d\u3053\u304b\u3089CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u30b9\u30bf\u30fc\u30c8\u3057\u3066\u3001CTA\u30dc\u30bf\u30f3\u306b\u300c\u5149\u308b\u300d\u3088\u3046\u306a\u52b9\u679c\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: xml; title: ; notranslate\" title=\"\">\n&lt;section class=&quot;article&quot;&gt;\n  &lt;h1&gt;\u8a18\u4e8b\u30bf\u30a4\u30c8\u30eb&lt;\/h1&gt;\n  &lt;p&gt;\n    \u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002&lt;br&gt;\n    \u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002&lt;br&gt;\n.....\n    \u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002\u30c0\u30df\u30fc\u30c6\u30ad\u30b9\u30c8\u3002&lt;br&gt;\n  &lt;\/p&gt;\n\n  &lt;!-- \u8aad\u4e86\u691c\u77e5\u306e\u201c\u756a\u5175\u201d\u3002CTA\u306e\u76f4\u524d\u306b\u7f6e\u304f --&gt;\n  &lt;div class=&quot;read-end-sentinel&quot; aria-hidden=&quot;true&quot;&gt;&lt;\/div&gt;\n\n  &lt;a id=&quot;cta&quot; class=&quot;cta&quot; href=&quot;javascript:void(0)&quot;&gt;\u304a\u554f\u3044\u5408\u308f\u305b\u306f\u3053\u3061\u3089&lt;\/a&gt;\n&lt;\/section&gt;\n\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: css; title: ; notranslate\" title=\"\">\n:root{\n  \/* \u25bc\u3053\u3053\u3067\u201c\u4f55\u56de\u30c1\u30ab\u30c1\u30ab\u201d\uff06\u201c\u901f\u3055\u201d\u3092\u8abf\u6574 *\/\n  --blink-iterations: 3;   \/* 2 \u304b 3 \u3092\u63a8\u5968\uff08\uff1d2\u56de or 3\u56de\u306e\u660e\u6ec5\uff09 *\/\n  --blink-duration: 0.22s; \/* 1\u30b5\u30a4\u30af\u30eb\u306e\u9577\u3055\u30020.16\u301c0.28s \u304f\u3089\u3044\u304c\u201c\u30c1\u30ab\u30c1\u30ab\u611f\u201d\u5f37\u3081 *\/\n}\n\n*{box-sizing:border-box}\nbody{\n  font-family:system-ui,-apple-system,&quot;Segoe UI&quot;,Roboto,&quot;Noto Sans JP&quot;,sans-serif;\n  line-height:1.8; margin:0; padding:32px 16px 80px; background:#f7f7f9; color:#222;\n}\n.article{\n  max-width:780px; margin:0 auto; background:#fff; padding:32px 28px 40px;\n  border-radius:12px; box-shadow:0 6px 22px rgba(0,0,0,.06);\n}\n.read-end-sentinel{ height:1px; }\n\n.cta{\n  display:block; margin-top:24px; text-align:center; text-decoration:none;\n  background:#0078d7; color:#fff; padding:16px 24px; border-radius:10px;\n  box-shadow:none; opacity:1; transform:translateZ(0);\n  transition: box-shadow .12s linear, opacity .12s linear, transform .12s linear;\n}\n\n\/* \u25bcCSS\u30a2\u30cb\u30e1\u201c\u3060\u3051\u201d\u3067\u660e\u6ec5\u3059\u308b\u3002JS\u306f\u3053\u306e\u30af\u30e9\u30b9\u3092\u4ed8\u3051\u308b\u3060\u3051 *\/\n.cta.is-blink{\n  animation: ctaBlink var(--blink-duration) linear var(--blink-iterations);\n}\n\n\/* \u70b9\u6ec5\u5f8c\u306e\u201c\u6b8b\u5149\u201d\uff08\u4efb\u610f\u3002\u4e0d\u8981\u306a\u3089\u524a\u9664OK\uff09 *\/\n.cta.after-glow{\n  box-shadow:0 0 20px 7px rgba(0,120,215,.80);\n}\n\n\/* \u660e\u6ec5\u306eON\/OFF\u3092\u306f\u3063\u304d\u308a\u3055\u305b\u308b\u30ad\u30fc\u30d5\u30ec\u30fc\u30e0 *\/\n@keyframes ctaBlink{\n  0%,100%{\n    opacity:1;\n    transform:scale(1.01);\n    box-shadow:0 0 18px 6px rgba(0,120,215,.95);\n  }\n  50%{\n    opacity:.18;\n    transform:scale(1);\n    box-shadow:none;\n  }\n}\n\n\/* \u30e2\u30fc\u30b7\u30e7\u30f3\u5f31\u3081\u8a2d\u5b9a\u306e\u74b0\u5883\u3067\u30821\u56de\u306f\u8996\u8a8d\u3067\u304d\u308b\u3088\u3046\u306b *\/\n@media (prefers-reduced-motion: reduce){\n  .cta{ transition:none; }\n  .cta.is-blink{ animation:none; }\n  .cta.after-glow{ box-shadow:0 0 24px 8px rgba(0,120,215,.85); }\n}\n\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nconst sentinel = document.querySelector(&#039;.read-end-sentinel&#039;);\nconst cta = document.getElementById(&#039;cta&#039;);\n\nlet wasIntersecting = false;\n\n\/\/ \u30a2\u30cb\u30e1\u518d\u751f\u3092\u6bce\u56de\u201c\u78ba\u5b9f\u306b\u201d\u3084\u308a\u76f4\u3059\u305f\u3081\u306e\u30c8\u30ea\u30ac\u30fc\u95a2\u6570\nfunction triggerBlink(){\n  if(!cta) return;\n\n  \/\/ \u524d\u56de\u306e\u72b6\u614b\u3092\u30ea\u30bb\u30c3\u30c8\uff08\u3053\u308c\u3067\u6bce\u56deCSS\u30a2\u30cb\u30e1\u3092\u982d\u304b\u3089\u518d\u751f\u3067\u304d\u308b\uff09\n  cta.classList.remove(&#039;is-blink&#039;,&#039;after-glow&#039;);\n\n  \/\/ reflow\u3067\u30a2\u30cb\u30e1\u3092\u78ba\u5b9f\u306b\u30ea\u30bb\u30c3\u30c8\n  \/\/ \uff08class\u306e\u4ed8\u3051\u5916\u3057\u3060\u3051\u3060\u3068\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u306f\u518d\u751f\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u305f\u3081\uff09\n  \/\/ eslint-disable-next-line no-unused-expressions\n  cta.offsetWidth;\n\n  \/\/ CSS\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u958b\u59cb\uff08JS\u306f\u30af\u30e9\u30b9\u3092\u4ed8\u3051\u308b\u3060\u3051\uff09\n  cta.classList.add(&#039;is-blink&#039;);\n\n  \/\/ \u30a2\u30cb\u30e1\u7d42\u4e86\u5f8c\u306b\u201c\u6b8b\u5149\u201d\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e\n  const computed = getComputedStyle(document.documentElement);\n  const iters = parseInt(computed.getPropertyValue(&#039;--blink-iterations&#039;).trim() || &#039;3&#039;, 10);\n  const dur   = parseFloat((computed.getPropertyValue(&#039;--blink-duration&#039;).trim() || &#039;0.22s&#039;).replace(&#039;s&#039;,&#039;&#039;)) * 1000;\n  const total = iters * dur;\n\n  \/\/ \u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30a4\u30d9\u30f3\u30c8\u306fCodePen\u306e\u57cb\u3081\u8fbc\u307f\u3067\u62fe\u3048\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3001\u78ba\u5b9f\u6027\u91cd\u8996\u3067setTimeout\n  setTimeout(() =&gt; {\n    cta.classList.remove(&#039;is-blink&#039;);\n    cta.classList.add(&#039;after-glow&#039;);\n  }, total + 30); \/\/ \u5c11\u3057\u30d0\u30c3\u30d5\u30a1\n}\n\n\/\/ \u300c\u975e\u4ea4\u5dee\u2192\u4ea4\u5dee\u300d\u306e\u77ac\u9593\u3060\u3051\u767a\u706b\uff08\u4e0a\u306b\u623b\u3063\u3066\u518d\u3073\u4e0b\u3063\u3066\u304d\u305f\u6642\u3082\u6bce\u56de\u767a\u706b\uff09\nconst io = new IntersectionObserver((entries) =&gt; {\n  entries.forEach(entry =&gt; {\n    const now = entry.isIntersecting;\n    if(!wasIntersecting &amp;&amp; now){\n      triggerBlink();\n    }\n    wasIntersecting = now;\n  });\n}, {\n  threshold: 0.05,\n  rootMargin: &#039;0px 0px -20% 0px&#039; \/\/ \u753b\u9762\u4e0b\u304b\u308920%\u624b\u524d\u3067\u767a\u706b\n});\n\nif(sentinel) io.observe(sentinel);\n\n\/\/ \u4efb\u610f\uff1aCTA\u30af\u30ea\u30c3\u30af\u3067\u6b8b\u5149\u3092\u6d88\u3059\uff08\u4f53\u9a13\u3092\u7de0\u3081\u308b\uff09\ncta?.addEventListener(&#039;click&#039;, () =&gt; {\n  cta.classList.remove(&#039;after-glow&#039;,&#039;is-blink&#039;);\n});\n\n<\/pre><\/div>\n\n\n<div class=\"wp-block-cp-codepen-gutenberg-embed-block cp_embed_wrapper\"><iframe id=\"cp_embed_MYKojPq\" src=\"\/\/codepen.io\/anon\/embed\/MYKojPq?height=450&amp;theme-id=1&amp;slug-hash=MYKojPq&amp;default-tab=result\" height=\"450\" scrolling=\"no\" frameborder=\"0\" allowfullscreen allowpaymentrequest name=\"CodePen Embed MYKojPq\" title=\"CodePen Embed MYKojPq\" class=\"cp_embed_iframe\" style=\"width:100%;overflow:hidden\">CodePen Embed Fallback<\/iframe><\/div>\n\n\n\n<h2 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