{"id":9206,"date":"2025-10-08T17:20:20","date_gmt":"2025-10-08T08:20:20","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9206"},"modified":"2025-10-16T20:22:55","modified_gmt":"2025-10-16T11:22:55","slug":"%e8%aa%b0%e3%81%a7%e3%82%82%e4%bd%bf%e3%81%88%e3%82%8bweb%e3%82%92%e6%8f%90%e6%a1%88-%e2%94%80-html-css%e3%81%a7%e3%81%a7%e3%81%8d%e3%82%8b%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b7","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/ui-ux\/%e8%aa%b0%e3%81%a7%e3%82%82%e4%bd%bf%e3%81%88%e3%82%8bweb%e3%82%92%e6%8f%90%e6%a1%88-%e2%94%80-html-css%e3%81%a7%e3%81%a7%e3%81%8d%e3%82%8b%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b7\/","title":{"rendered":"\u201c\u8ab0\u3067\u3082\u4f7f\u3048\u308bWeb\u201d\u3092\u63d0\u6848 \u2500 HTML\/CSS\u3067\u3067\u304d\u308b\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u6539\u5584"},"content":{"rendered":"
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\u682a\u5f0f\u4f1a\u793e\u30d5\u30a1\u30b9\u30c8\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306eWeb\u30c7\u30a3\u30ec\u30af\u30bf\u306e\u50cd\u304f\u304a\u304b\u3093\u3067\u3059\u3002\u4eca\u56de\u3082\u3061\u3087\u3063\u3068\u524d\u56de\u3068\u95a2\u4fc2\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u8aad\u307f\u3084\u3059\u3055\u3084\u898b\u3084\u3059\u3055\u3001\u3068\u3044\u3046\u89b3\u70b9\u3067\u3001\u4eca\u5ea6\u306fWeb\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5bfe\u5fdc\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u3068\u3044\u3063\u3066\u3082Web\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u3068\u3044\u3046\u8a00\u8449\u306f\u3001\u3082\u306f\u3084Web\u5236\u4f5c\u306e\u4e16\u754c\u3067\u306f\u7279\u5225\u306a\u3082\u306e\u3067\u306f\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u306d\u3002\u5f0a\u793e\u306b\u3054\u4f9d\u983c\u3044\u305f\u3060\u304f\u591a\u304f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5bfe\u5fdc\u306f\u5f53\u305f\u308a\u524d\u306b\u306a\u3063\u3066\u304d\u3066\u3044\u307e\u3059\u3002\u3067\u3082\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u300c\u3069\u3046\u5b9f\u88c5\u3059\u308c\u3070\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5bfe\u5fdc\u3057\u305f\u4e0a\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u672c\u5f53\u306b\u4f7f\u3044\u3084\u3059\u304f\u306a\u308b\u306e\u304b\u300d\u304c\u8ab2\u984c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u4eca\u56de\u306f\u3001HTML\u3068CSS\u3067\u5b9f\u73fe\u3067\u304d\u308b\u201c\u5b9f\u8df5\u7684\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u6539\u5584\u201d\u306b\u3064\u3044\u3066\u304a\u4f1d\u3048\u3057\u3066\u307f\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u90e8\u5206\u306f\u4ed6\u306e\u3044\u308d\u3044\u308d\u306a\u30b5\u30a4\u30c8\u3067\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u73fe\u5834\u3067\u306e\u5177\u4f53\u7684\u306a\u30ce\u30a6\u30cf\u30a6\u3084\u6ce8\u610f\u70b9\u3092\u4e2d\u5fc3\u306b\u66f8\u3044\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n

\u898b\u51fa\u3057\u69cb\u9020\u3068\u30e9\u30f3\u30c9\u30de\u30fc\u30af\u8a2d\u8a08<\/h2>\n\n\n\n

\u898b\u51fa\u3057\u69cb\u9020\u306f\u3001\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u5229\u7528\u8005\u306b\u3068\u3063\u3066\u30b5\u30a4\u30c8\u306e\u9aa8\u683c\u305d\u306e\u3082\u306e\u3067\u3059\u3002<h1><\/code>\u304b\u3089<h6><\/code>\u307e\u3067\u3092\u9806\u5e8f\u6b63\u3057\u304f\u8a2d\u8a08\u3059\u308b\u306e\u306f\u5f53\u7136\u3068\u3057\u3066\u3001\u5f0a\u793e\u306e\u6848\u4ef6\u3067\u306f\u3001\u30da\u30fc\u30b8\u5168\u4f53\u3092\u30e9\u30f3\u30c9\u30de\u30fc\u30af\u30ed\u30fc\u30eb\u3067\u5206\u5272\u3059\u308b\u3053\u3068<\/strong>\u3092\u91cd\u8996\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u3084\u652f\u63f4\u6280\u8853\u3092\u4f7f\u3046\u30e6\u30fc\u30b6\u30fc\u304c\u52b9\u7387\u7684\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u79fb\u52d5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n

\n<header role="banner">\n  <h1>\u30b5\u30a4\u30c8\u30bf\u30a4\u30c8\u30eb<\/h1>\n<\/header>\n\n<nav role="navigation" aria-label="\u30e1\u30a4\u30f3\u30e1\u30cb\u30e5\u30fc">\n  <ul>\n    <li><a href="#about">\u4f1a\u793e\u6982\u8981<\/a><\/li>\n    <li><a href="#service">\u30b5\u30fc\u30d3\u30b9<\/a><\/li>\n    <li><a href="#contact">\u304a\u554f\u3044\u5408\u308f\u305b<\/a><\/li>\n  <\/ul>\n<\/nav>\n\n<main role="main">\n  <h2>\u30cb\u30e5\u30fc\u30b9\u4e00\u89a7<\/h2>\n  <article>\n    <h3>\u6700\u65b0\u306e\u304a\u77e5\u3089\u305b<\/h3>\n    <p>...<\/p>\n  <\/article>\n<\/main>\n\n<footer role="contentinfo">\n  <p>\u00a9 2025 Fastcoding Inc.<\/p>\n<\/footer>\n<\/pre><\/div>\n\n\n
\u3053\u306e\u3088\u3046\u306b\u30e9\u30f3\u30c9\u30de\u30fc\u30af\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3068\u3001\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u304c\u300c\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u300d\u300c\u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\u300d\u300c\u30d5\u30c3\u30bf\u30fc\u300d\u3068\u8aad\u307f\u4e0a\u3052\u3001\u60c5\u5831\u306e\u6574\u7406\u304c\u81ea\u7136\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u8907\u6570\u306e\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3092\u6301\u3064\u30b5\u30a4\u30c8\u3067\u306f\u3001aria-label<\/code>\u3092\u660e\u793a\u3057\u3066\u6df7\u4e71\u3092\u9632\u3050\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
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\u30d5\u30a9\u30fc\u30ab\u30b9\u79fb\u52d5\u3068\u52d5\u7684UI\u306e\u5236\u5fa1<\/h2>\n\n\n\n
\u30e2\u30fc\u30c0\u30eb\u30a6\u30a3\u30f3\u30c9\u30a6\u3084\u30c9\u30ed\u30ef\u30fc\u30e1\u30cb\u30e5\u30fc\u306a\u3069\u3001JavaScript\u3092\u4f7f\u3063\u305f\u52d5\u7684UI\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u79fb\u52d5\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30a2\u30af\u30bb\u30b7\u30d6\u30eb\u306a\u30e2\u30fc\u30c0\u30eb\u3092\u8a2d\u8a08\u3059\u308b\u969b\u3001\u5f0a\u793e\u3067\u306f\u6b21\u306e\u3088\u3046\u306b\u300c\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u9589\u3058\u8fbc\u3081\u300d\u300c\u623b\u308a\u4f4d\u7f6e\u306e\u8a18\u61b6\u300d\u300c\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u3078\u306e\u72b6\u614b\u4f1d\u9054\u300d\u3092\u30bb\u30c3\u30c8\u3067\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n
\n\/\/ Snippet: \u30e2\u30fc\u30c0\u30eb\u5185\u306e\u30d5\u30a9\u30fc\u30ab\u30b9\u7ba1\u7406\nconst openModal = (trigger, modal) => {\n  const focusable = modal.querySelectorAll('a, button, input, [tabindex="0"]');\n  const first = focusable[0];\n  const last = focusable[focusable.length - 1];\n\n  modal.removeAttribute('aria-hidden');\n  first.focus();\n\n  modal.addEventListener('keydown', e => {\n    if (e.key === 'Tab') {\n      if (e.shiftKey && document.activeElement === first) {\n        e.preventDefault();\n        last.focus();\n      } else if (!e.shiftKey && document.activeElement === last) {\n        e.preventDefault();\n        first.focus();\n      }\n    }\n  });\n};\n<\/pre><\/div>\n\n\n
\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u79fb\u52d5\u3092\u660e\u78ba\u306b\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u64cd\u4f5c\u3067\u3082\u81ea\u7136\u306a\u52d5\u304d\u3092\u7dad\u6301\u3067\u304d\u307e\u3059\u3002\u30e2\u30fc\u30c0\u30eb\u3092\u9589\u3058\u305f\u5f8c\u306b\u306f\u3001\u5143\u306e\u30c8\u30ea\u30ac\u30fc\u30dc\u30bf\u30f3\u3078\u30d5\u30a9\u30fc\u30ab\u30b9\u3092\u623b\u3059\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u3053\u308c\u3092\u6020\u308b\u3068\u3001\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u5229\u7528\u8005\u306f\u73fe\u5728\u5730\u3092\u898b\u5931\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
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CSS\u3067\u3067\u304d\u308b\u30d5\u30a9\u30fc\u30ab\u30b9\u53ef\u8996\u5316\u3068\u30e6\u30fc\u30b6\u30fc\u8a2d\u5b9a\u306e\u5c0a\u91cd<\/h2>\n\n\n\n
CSS\u3060\u3051\u3067\u3082\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u898b\u3048\u65b9\u3092\u6539\u5584\u3067\u304d\u307e\u3059\u3002outline<\/code>\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u306e\u306f\u3082\u3061\u308d\u3093\u3067\u3059\u304c\u3001:focus-visible<\/code>\u3068prefers-reduced-motion<\/code>\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u904e\u5270\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u907f\u3051\u3064\u3064\u660e\u78ba\u306a\u64cd\u4f5c\u611f\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n
\na:focus-visible,\nbutton:focus-visible {\n  outline: 3px solid #1a73e8;\n  outline-offset: 3px;\n  transition: outline-offset 0.2s ease;\n}\n\n@media (prefers-reduced-motion: reduce) {\n  a:focus-visible,\n  button:focus-visible {\n    transition: none;\n  }\n}\n<\/pre><\/div>\n\n\n
\u3053\u3053\u3067\u306f\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u6291\u3048\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u300c\u30e6\u30fc\u30b6\u30fc\u304c\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u74b0\u5883\u3092\u5c0a\u91cd\u3059\u308b\u300d\u3068\u3044\u3046\u59ff\u52e2\u304c\u5927\u5207\u3067\u3059\u3002\u7279\u306b\u52d5\u304d\u306b\u654f\u611f\u306a\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u3001\u610f\u56f3\u3057\u306a\u3044\u30a8\u30d5\u30a7\u30af\u30c8\u306f\u6df7\u4e71\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
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\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u306e\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5b9f\u88c5<\/h2>\n\n\n\n
\u8fd1\u5e74\u306e\u5f0a\u793e\u6848\u4ef6\u3067\u306f\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u3092\u300c\u5168\u4f53\u8a2d\u8a08\u300d\u3067\u306f\u306a\u304f\u300c\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u300d\u3067\u8003\u3048\u308b\u3053\u3068\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u7279\u306bReact\u3084Vue\u306a\u3069\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u30d9\u30fc\u30b9\u306e\u958b\u767a\u3067\u306f\u3001\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5c5e\u6027\u3092\u9069\u5207\u306b\u7d44\u307f\u8fbc\u3080\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u30bf\u30d6UI\u306e\u4f8b<\/h3>\n\n\n\n
\u30bf\u30d6\u69cb\u9020\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408\u3001WAI-ARIA Authoring Practices\u306b\u6e96\u62e0\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u3067\u3082\u30bf\u30d6\u3068\u30d1\u30cd\u30eb\u306e\u95a2\u4fc2\u3092\u6b63\u78ba\u306b\u4f1d\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n
\n<div role="tablist" aria-label="\u88fd\u54c1\u30ab\u30c6\u30b4\u30ea\u30fc">\n  <button role="tab" aria-controls="panel1" aria-selected="true">\u65b0\u5546\u54c1<\/button>\n  <button role="tab" aria-controls="panel2" aria-selected="false">\u4eba\u6c17\u5546\u54c1<\/button>\n<\/div>\n<div id="panel1" role="tabpanel">...<\/div>\n<div id="panel2" role="tabpanel" hidden>...<\/div>\n<\/pre><\/div>\n\n\n
\u3053\u306e\u69cb\u9020\u3067\u306f\u3001aria-selected<\/code>\u306e\u72b6\u614b\u3092JS\u3067\u52d5\u7684\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u64cd\u4f5c\u306b\u5408\u308f\u305b\u3066\u30b9\u30af\u30ea\u30fc\u30f3\u30ea\u30fc\u30c0\u30fc\u304c\u300c\u9078\u629e\u4e2d\u300d\u3092\u6b63\u3057\u304f\u4f1d\u9054\u3057\u307e\u3059\u3002CSS\u3067\u306e\u8996\u899a\u7684\u306a\u5207\u308a\u66ff\u3048\u3068\u4e26\u884c\u3057\u3066\u3001HTML\u69cb\u9020\u3092\u6b63\u78ba\u306b\u6574\u3048\u308b\u3053\u3068\u304c\u809d\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n
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