{"id":9459,"date":"2025-12-02T12:27:36","date_gmt":"2025-12-02T03:27:36","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9459"},"modified":"2026-02-03T11:37:34","modified_gmt":"2026-02-03T02:37:34","slug":"smart-toast-notification-ux","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/ui-ux\/smart-toast-notification-ux\/","title":{"rendered":"\u8208\u5473\u3092\u6301\u3061\u305d\u3046\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u7e3e\u3092\u30c1\u30e9\u898b\u305b\uff08\u30c8\u30fc\u30b9\u30c8\u8868\u793a\uff09"},"content":{"rendered":"<div class=\"the_content\">\n<p>\u3053\u3093\u306b\u3061\u306f\u3001Web\u30c7\u30a3\u30ec\u30af\u30bf\u30fc\u306eBigVi\u3067\u3059\u3002\u6771\u4eac\u306f\u3068\u3066\u3082\u5bd2\u3044\u306e\u3067\u65e9\u304f\u5e30\u308a\u305f\u3044\u3067\u3059\u3002\u3002\u3002\u3082\u3046\u3059\u3050\u79c1\u306e\u56fd\u306e\u30d9\u30c8\u30ca\u30e0\u3082\u304a\u6b63\u6708\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u524d\u306b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u300c\u30b5\u30fc\u30d3\u30b9\u306e\u5b9f\u7e3e\u3092\u3082\u3063\u3068\u30a2\u30d4\u30fc\u30eb\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u76f8\u8ac7\u3092\u53d7\u3051\u307e\u3057\u305f\u3002\u3067\u3082\u300c\u5e38\u306b\u8868\u793a\u3055\u308c\u308b\u30d0\u30ca\u30fc\u306f\u90aa\u9b54\u3060\u304b\u3089\u5acc\u3060\u300d\u3068\u3082\u8a00\u308f\u308c\u307e\u3057\u305f\u3002\u305d\u306e\u3068\u304d\u3001\u79c1\u306f\u300c\u30df\u30cb\u30fb\u30c8\u30fc\u30b9\u30c8\u300d\u3068\u3044\u3046\u65b9\u6cd5\u3092\u63d0\u6848\u3057\u307e\u3057\u305f\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30da\u30fc\u30b8\u3092\u8aad\u307f\u9032\u3081\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u3001\u53f3\u4e0b\u306b\u5c0f\u3055\u304f\u5b9f\u7e3e\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u3060\u3044\u305f\u3044\u30bb\u30af\u30b7\u30e7\u30f3\uff12\u3050\u3089\u3044\u3067\u3059\u30021.5\u79d2\u3060\u3051\u898b\u305b\u3066\u3001\u3059\u3050\u6d88\u3048\u307e\u3059\u3002\u90aa\u9b54\u306b\u306a\u3089\u306a\u3044\u3057\u3001\u3067\u3082\u3061\u3083\u3093\u3068\u76ee\u306b\u5165\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u306a\u305c\u300c\u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\u300d\u3067\u8868\u793a\u3059\u308b\u306e\u304b<\/h2>\n\n\n\n<p>\u6700\u521d\u304b\u3089\u8868\u793a\u3059\u308b\u3068\u3001\u8aad\u8005\u306f\u307e\u3060\u4f55\u3082\u8aad\u3093\u3067\u3044\u307e\u305b\u3093\u3002\u8208\u5473\u3092\u6301\u3064\u524d\u306b\u5b9f\u7e3e\u3092\u898b\u305b\u3066\u3082\u3001\u3042\u307e\u308a\u52b9\u679c\u304c\u306a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3067\u3082\u3001\u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\u307e\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u305f\u4eba\u306f\u304d\u3063\u3068\u300c\u3053\u306e\u30b5\u30fc\u30d3\u30b9\u3001\u6c17\u306b\u306a\u308b\u306a\u300d\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u3068\u304d\u306b\u305f\u3068\u3048\u3070\u300c3,000\u793e\u4ee5\u4e0a\u304c\u5229\u7528\u4e2d\u300d\u3068\u898b\u305b\u308b\u3068\u3001\u300c\u591a\u304f\u306e\u4f1a\u793e\u304c\u4f7f\u3063\u3066\u3044\u308b\u306a\u3089\u5b89\u5fc3\u3060\u300d\u3068\u3044\u3046\u6c17\u6301\u3061\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u793e\u4f1a\u7684\u8a3c\u660e\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002\u307f\u3093\u306a\u304c\u4f7f\u3063\u3066\u3044\u308b\u3082\u306e\u306f\u826f\u3044\u3082\u306e\u3001\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u88c5\u306e\u6982\u8981<\/h2>\n\n\n\n<p>\u4eca\u56de\u306e\u5b9f\u88c5\u306f\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u5b88\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u753b\u9762\u306b\u5165\u3063\u305f\u3089\u767a\u706b<\/li>\n\n\n\n<li>\u53f3\u4e0b\u306b\u30df\u30cb\u30fb\u30c8\u30fc\u30b9\u30c8\u3092\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\u3067\u8868\u793a<\/li>\n\n\n\n<li>1.5\u79d2\u3060\u3051\u8868\u793a\u3057\u3066\u3001\u30d5\u30a7\u30fc\u30c9\u30a2\u30a6\u30c8\u3067\u6d88\u3048\u308b<\/li>\n\n\n\n<li>\u97f3\u306f\u9cf4\u3089\u3055\u306a\u3044\u3001\u70b9\u6ec5\u3082\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u4e00\u5ea6\u8868\u793a\u3057\u305f\u3089\u3001\u540c\u3058\u30da\u30fc\u30b8\u3067\u306f\u4e8c\u5ea6\u3068\u8868\u793a\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u82e6\u624b\u306a\u4eba\u3078\u306e\u914d\u616e\uff08prefers-reduced-motion\uff09<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">HTML\u69cb\u9020<\/h2>\n\n\n\n<p>HTML\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002\u30c8\u30fc\u30b9\u30c8\u306e\u30b3\u30f3\u30c6\u30ca\u3092\u4f5c\u3063\u3066\u3001\u4e2d\u306b\u5b9f\u7e3e\u306e\u5185\u5bb9\u3092\u5165\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: xml; title: ; notranslate\" title=\"\">\n&lt;!-- \u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\uff08\u76e3\u8996\u5bfe\u8c61\uff09 --&gt;\n&lt;section id=&quot;section-2&quot; class=&quot;section&quot;&gt;\n  &lt;h2&gt;\u30b5\u30fc\u30d3\u30b9\u306e\u7279\u5fb4&lt;\/h2&gt;\n  &lt;p&gt;\u79c1\u305f\u3061\u306e\u30b5\u30fc\u30d3\u30b9\u306f...&lt;\/p&gt;\n&lt;\/section&gt;\n\n&lt;!-- \u30df\u30cb\u30fb\u30c8\u30fc\u30b9\u30c8\uff08\u5b9f\u7e3e\u8868\u793a\u7528\uff09 --&gt;\n&lt;div class=&quot;social-proof-toast&quot; id=&quot;socialProofToast&quot; aria-live=&quot;polite&quot; aria-atomic=&quot;true&quot;&gt;\n  &lt;div class=&quot;toast-content&quot;&gt;\n    &lt;span class=&quot;toast-number&quot;&gt;3,000+&lt;\/span&gt;\n    &lt;span class=&quot;toast-text&quot;&gt;\u793e\u4ee5\u4e0a\u304c\u5229\u7528\u4e2d&lt;\/span&gt;\n  &lt;\/div&gt;\n&lt;\/div&gt;\n<\/pre><\/div>\n\n\n<p><code>aria-live=\"polite\"<\/code>\u3092\u4ed8\u3051\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u5411\u3051\u306e\u914d\u616e\u3067\u3059\u3002\u300cpolite\u300d\u306f\u300c\u4ed6\u306e\u5185\u5bb9\u3092\u90aa\u9b54\u3057\u306a\u3044\u3067\u3001\u533a\u5207\u308a\u306e\u826f\u3044\u3068\u3053\u308d\u3067\u8aad\u307f\u4e0a\u3052\u3066\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CSS\u3067\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\/\u30a2\u30a6\u30c8\u3092\u4f5c\u308b<\/h2>\n\n\n\n<p>CSS\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u308a\u307e\u3059\u3002\u6700\u521d\u306f\u975e\u8868\u793a\u3067\u3001\u30af\u30e9\u30b9\u304c\u4ed8\u3044\u305f\u3089\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: css; title: ; notranslate\" title=\"\">\n\/* \u30df\u30cb\u30fb\u30c8\u30fc\u30b9\u30c8\u306e\u57fa\u672c\u30b9\u30bf\u30a4\u30eb *\/\n.social-proof-toast {\n  position: fixed;\n  bottom: 24px;\n  right: 24px;\n  z-index: 1000;\n  \n  \/* \u521d\u671f\u72b6\u614b\uff1a\u975e\u8868\u793a *\/\n  opacity: 0;\n  transform: translateY(20px);\n  pointer-events: none;\n  \n  \/* \u30c8\u30e9\u30f3\u30b8\u30b7\u30e7\u30f3\u8a2d\u5b9a *\/\n  transition: opacity 0.3s ease-out, transform 0.3s ease-out;\n}\n\n\/* \u8868\u793a\u72b6\u614b *\/\n.social-proof-toast.show {\n  opacity: 1;\n  transform: translateY(0);\n  pointer-events: auto;\n}\n\n\/* \u30c8\u30fc\u30b9\u30c8\u306e\u898b\u305f\u76ee *\/\n.toast-content {\n  display: flex;\n  align-items: center;\n  gap: 8px;\n  padding: 12px 20px;\n  background: #ffffff;\n  border-radius: 8px;\n  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);\n  font-size: 14px;\n}\n\n.toast-number {\n  font-size: 18px;\n  font-weight: 700;\n  color: #2563eb;\n}\n\n.toast-text {\n  color: #374151;\n}\n\n\/* \u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u82e6\u624b\u306a\u4eba\u3078\u306e\u914d\u616e *\/\n@media (prefers-reduced-motion: reduce) {\n  .social-proof-toast {\n    transition: opacity 0.1s ease-out;\n    transform: none;\n  }\n  \n  .social-proof-toast.show {\n    transform: none;\n  }\n}\n<\/pre><\/div>\n\n\n<p>\u30dd\u30a4\u30f3\u30c8\u306f<code>prefers-reduced-motion<\/code>\u3067\u3059\u3002\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u304c\u82e6\u624b\u306a\u4eba\u3084\u3001\u52d5\u304d\u306b\u9154\u3044\u3084\u3059\u3044\u4eba\u306e\u305f\u3081\u306b\u3001\u52d5\u304d\u3092\u6700\u5c0f\u9650\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">JavaScript\u3067\u767a\u706b\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u5236\u5fa1<\/h2>\n\n\n\n<p>IntersectionObserver\u3092\u4f7f\u3063\u3066\u3001\u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u753b\u9762\u306b\u5165\u3063\u305f\u304b\u3092\u76e3\u8996\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\ndocument.addEventListener(&#039;DOMContentLoaded&#039;, function() {\n  const section2 = document.getElementById(&#039;section-2&#039;);\n  const toast = document.getElementById(&#039;socialProofToast&#039;);\n  \n  \/\/ \u8981\u7d20\u304c\u306a\u3051\u308c\u3070\u4f55\u3082\u3057\u306a\u3044\n  if (!section2 || !toast) return;\n  \n  \/\/ \u3059\u3067\u306b\u8868\u793a\u6e08\u307f\u304b\u30c1\u30a7\u30c3\u30af\uff08sessionStorage\u3067\u7ba1\u7406\uff09\n  const alreadyShown = sessionStorage.getItem(&#039;socialProofShown&#039;);\n  if (alreadyShown) return;\n  \n  \/\/ IntersectionObserver\u3092\u4f5c\u6210\n  const observer = new IntersectionObserver(function(entries) {\n    entries.forEach(function(entry) {\n      \/\/ \u7b2c2\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u753b\u9762\u306b\u5165\u3063\u305f\u3089\n      if (entry.isIntersecting) {\n        showToast();\n        \n        \/\/ \u4e00\u5ea6\u3060\u3051\u5b9f\u884c\u3059\u308b\u306e\u3067\u3001\u76e3\u8996\u3092\u6b62\u3081\u308b\n        observer.unobserve(section2);\n      }\n    });\n  }, {\n    threshold: 0.3  \/\/ 30%\u898b\u3048\u305f\u3089\u767a\u706b\n  });\n  \n  \/\/ \u76e3\u8996\u958b\u59cb\n  observer.observe(section2);\n  \n  \/\/ \u30c8\u30fc\u30b9\u30c8\u3092\u8868\u793a\u3059\u308b\u95a2\u6570\n  function showToast() {\n    \/\/ \u8868\u793a\n    toast.classList.add(&#039;show&#039;);\n    \n    \/\/ \u8868\u793a\u6e08\u307f\u30d5\u30e9\u30b0\u3092\u4fdd\u5b58\n    sessionStorage.setItem(&#039;socialProofShown&#039;, &#039;true&#039;);\n    \n    \/\/ 1.5\u79d2\u5f8c\u306b\u975e\u8868\u793a\n    setTimeout(function() {\n      toast.classList.remove(&#039;show&#039;);\n    }, 1500);\n  }\n});\n<\/pre><\/div>\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>sessionStorage\u3067\u8868\u793a\u6e08\u307f\u7ba1\u7406<\/strong><br>\u540c\u3058\u30da\u30fc\u30b8\u3067\u4f55\u5ea6\u3082\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3082\u3001\u30c8\u30fc\u30b9\u30c8\u306f\u4e00\u5ea6\u3060\u3051\u3057\u304b\u8868\u793a\u3057\u307e\u305b\u3093\u3002sessionStorage\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u30bf\u30d6\u3092\u9589\u3058\u305f\u3089\u30ea\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u3002\u300c\u3057\u3064\u3053\u3044\u300d\u3068\u601d\u308f\u308c\u306a\u3044\u305f\u3081\u306e\u5de5\u592b\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>threshold: 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