{"id":178,"date":"2025-12-09T17:48:48","date_gmt":"2025-12-09T08:48:48","guid":{"rendered":"https:\/\/www.p-united.com\/web-accessibility\/?p=178"},"modified":"2025-12-10T13:17:55","modified_gmt":"2025-12-10T04:17:55","slug":"2-4-13","status":"publish","type":"post","link":"https:\/\/www.p-united.com\/web-accessibility\/2-4-13\/","title":{"rendered":"\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u5916\u89b3"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u9054\u6210\u57fa\u6e96 2.4.13 \u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u5916\u89b3\u3010AA\u3011<\/h2>\n\n\n\n<p>\u30ad\u30fc\u30dc\u30fc\u30c9\u64cd\u4f5c\u3067\u30d5\u30a9\u30fc\u30ab\u30b9\u53ef\u80fd\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u30d5\u30a9\u30fc\u30ab\u30b9\u304c\u5f53\u305f\u3063\u305f\u3068\u304d\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u8996\u899a\u7684\u306b\u305d\u306e\u72b6\u614b\u3092<strong>\u5bb9\u6613\u306b\u5224\u5225\u3067\u304d\u308b<\/strong>\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u8981\u4ef6\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8981\u4ef6<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td>\u30ec\u30d9\u30eb<\/td><td>AA<\/td><\/tr><tr><td>\u5bfe\u8c61<\/td><td>\u30ad\u30fc\u30dc\u30fc\u30c9\u64cd\u4f5c\u3067\u30d5\u30a9\u30fc\u30ab\u30b9\u53ef\u80fd\u306a\u5168\u3066\u306eUI\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/td><\/tr><tr><td>\u5fc5\u9808\u6761\u4ef6<\/td><td>\u30d5\u30a9\u30fc\u30ab\u30b9\u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u304c <strong>\u8996\u8a8d\u53ef\u80fd\u304b\u3064\u8b58\u5225\u3057\u3084\u3059\u3044<\/strong> \u3053\u3068<\/td><\/tr><tr><td>\u4e3b\u306a\u5224\u65ad\u6307\u6a19<\/td><td>\u592a\u3055\u3001\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3001\u30b5\u30a4\u30ba\uff08\u30d4\u30af\u30bb\u30eb\u9762\u7a4d\uff09\u306a\u3069\u306e<strong>\u8996\u899a\u7684\u306a\u660e\u78ba\u3055<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u8981\u4ef6\u306e\u8a73\u7d30\uff08\u6b21\u306e2\u3064\u306e\u8981\u7d20\u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u53ef\u8996\u6027<\/strong>\u306e\u57fa\u6e96<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u306f\u3001\u5c11\u306a\u304f\u3068\u3082 1 CSS \u30d4\u30af\u30bb\u30eb\u306e\u7dda\u5e45\u3092\u6301\u3064\u3053\u3068<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u3068\u80cc\u666f\u3068\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u6bd4\u304c 3:1 \u4ee5\u4e0a\u3067\u3042\u308b\u3053\u3068<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9762\u7a4d<\/strong>\u306e\u57fa\u6e96<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u64cd\u4f5c\u53ef\u80fd\u306a\u9818\u57df\u306e\u5c11\u306a\u304f\u3068\u308250\uff05\u4ee5\u4e0a\u3092\u56f2\u3080\u304b\u3001\u30ab\u30d0\u30fc\u3057\u3066\u3044\u308b\u3053\u3068<br>\uff08\u4f8b\u3048\u3070\u3001\u30ea\u30f3\u30af\u30dc\u30bf\u30f3\u306e\u5468\u56f2\u306b\u8f2a\u90ed\u304c\u8868\u793a\u3055\u308c\u308b\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e0d\u9069\u5408\u306a\u4f8b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u30ea\u30f3\u30b0\u304c\u975e\u5e38\u306b\u7d30\u3044\u3001\u307e\u305f\u306f\u80cc\u666f\u3068\u8272\u304c\u540c\u5316\u3057\u3066\u898b\u3048\u306b\u304f\u3044<\/li>\n\n\n\n<li>\u5358\u306b\u8272\u3092\u5909\u3048\u308b\u3060\u3051\u3067\u3001\u30d5\u30a9\u30fc\u30ab\u30b9\u304c\u3069\u3053\u306b\u3042\u308b\u304b\u5224\u5225\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u30de\u30a6\u30b9\u30db\u30d0\u30fc\u3068\u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u72b6\u614b\u304c\u533a\u5225\u3067\u304d\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u9069\u5408\u3057\u3066\u3044\u308b\u4f8b<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u6642\u306b\u592a\u304f\u3066\u6fc3\u3044\u5916\u67a0\u304c\u8868\u793a\u3055\u308c\u308b\uff08\u4f8b\uff1aoutline: 2px solid #000;\uff09<\/li>\n\n\n\n<li>\u80cc\u666f\u8272\u3068\u5341\u5206\u306a\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u6301\u3063\u305f\u660e\u77ad\u306a\u30cf\u30a4\u30e9\u30a4\u30c8<\/li>\n\n\n\n<li>\u30ea\u30f3\u30af\u3084\u30dc\u30bf\u30f3\u304c\u30d5\u30a9\u30fc\u30ab\u30b9\u3055\u308c\u305f\u969b\u306b\u8981\u7d20\u306e\u5927\u534a\u304c\u5f37\u8abf\u8868\u793a\u3055\u308c\u308b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u88c5\u4f8b\uff08CSS\uff09<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>button:focus {\n  outline: 3px solid #005fcc; \/* 3px\u306e\u592a\u3055\uff0b\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u8272 *\/\n  outline-offset: 2px;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u88dc\u8db3\uff1a\u65e2\u5b58\u306e2.4.7\u3068\u306e\u9055\u3044<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6bd4\u8f03\u9805\u76ee<\/th><th>2.4.7 \u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u53ef\u8996\u5316\uff08AA\uff09<\/th><th>2.4.13 \u30d5\u30a9\u30fc\u30ab\u30b9\u306e\u5916\u89b3\uff08AA\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u8981\u6c42\u5185\u5bb9<\/td><td>\u30d5\u30a9\u30fc\u30ab\u30b9\u304c<strong>\u898b\u3048\u308b\u3053\u3068<\/strong><\/td><td>\u30d5\u30a9\u30fc\u30ab\u30b9\u304c<strong>\u8996\u899a\u7684\u306b\u660e\u78ba\u3067\u3042\u308b\u3053\u3068<\/strong><\/td><\/tr><tr><td>\u30ec\u30d9\u30eb<\/td><td>AA<\/td><td>AA\uff08WCAG 2.2\u3067\u65b0\u8a2d\uff09<\/td><\/tr><tr><td>\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3084\u592a\u3055<\/td><td>\u660e\u78ba\u306a\u57fa\u6e96\u306a\u3057<\/td><td>\u660e\u78ba\u306a\u6570\u5024\u57fa\u6e96\u3042\u308a\uff08\u592a\u30551px\u4ee5\u4e0a\u3001\u30b3\u30f3\u30c8\u30e9\u30b9\u30c83:1\u4ee5\u4e0a\u306a\u3069\uff09<\/td><\/tr><tr><td>\u9762\u7a4d\u306e\u8981\u4ef6<\/td><td>\u306a\u3057<\/td><td>\u30d5\u30a9\u30fc\u30ab\u30b9\u5bfe\u8c61\u306e50\uff05\u4ee5\u4e0a\u3092\u30ab\u30d0\u30fc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u5229\u70b9<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u89b3\u70b9<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u5411\u4e0a<\/td><td>\u30d5\u30a9\u30fc\u30ab\u30b9\u304c\u660e\u78ba\u306b\u306a\u308b\u3053\u3068\u3067\u3001\u8996\u899a\u7684\u306b\u308f\u304b\u308a\u3084\u3059\u304f\u306a\u308b<\/td><\/tr><tr><td>\u64cd\u4f5c\u6027\u5411\u4e0a<\/td><td>\u9ad8\u9f62\u8005\u30fb\u8996\u899a\u969c\u5bb3\u8005\u30fb\u30ed\u30fc\u30d3\u30b8\u30e7\u30f3\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u91cd\u8981<\/td><\/tr><tr><td>\u30e6\u30fc\u30b6\u30d3\u30ea\u30c6\u30a3\u5f37\u5316<\/td><td>\u3069\u306e\u8981\u7d20\u3092\u64cd\u4f5c\u3057\u3066\u3044\u308b\u304b\u5373\u5ea7\u306b\u5224\u65ad\u3067\u304d\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30ab\u30b9\u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u304c\u5fc5\u305a\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>\u592a\u3055\u304c 1px \u4ee5\u4e0a \u304b\uff1f<\/li>\n\n\n\n<li>\u80cc\u666f\u3068\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u6bd4\u304c 3:1 \u4ee5\u4e0a \u304b\uff1f<\/li>\n\n\n\n<li>\u5bfe\u8c61\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e 50\uff05\u4ee5\u4e0a \u3092\u5f37\u8abf\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>\u30db\u30d0\u30fc\u3068\u30d5\u30a9\u30fc\u30ab\u30b9\u304c\u660e\u78ba\u306b\u533a\u5225\u53ef\u80fd\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td>\u9054\u6210\u57fa\u6e96<\/td><td>2.4.13 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