{"id":17939,"date":"2020-01-23T13:28:06","date_gmt":"2020-01-23T04:28:06","guid":{"rendered":"https:\/\/uxdaystokyo.com\/articles\/?post_type=glossary&#038;p=17939"},"modified":"2020-06-15T18:34:05","modified_gmt":"2020-06-15T09:34:05","slug":"regressive-enhancement","status":"publish","type":"glossary","link":"https:\/\/uxdaystokyo.com\/articles\/glossary\/regressive-enhancement\/","title":{"rendered":"\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8"},"content":{"rendered":"<p>\u30d6\u30e9\u30a6\u30b6\u304c\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u65e2\u5b58\u306eWeb\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u5229\u7528\u3067\u304d\u308b\u30d6\u30e9\u30a6\u30b6\u306e\u6a5f\u80fd\u304c\u5897\u3048\u3066\u3044\u304f\u3002\u6700\u65b0\u306e\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306bWeb\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u6539\u5584\u3057\u3066\u3044\u304f\u304c\u3001\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u52d5\u304b\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e3\u3064\u306f\u65b0\u65e7\u3069\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u3082\u6700\u4f4e\u9650\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u898b\u308c\u308b\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u3066\u3044\u308b\u958b\u767a\u624b\u6cd5\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/graceful-degradation\/\">\u30b0\u30ec\u30a4\u30b9\u30d5\u30eb\u30c7\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3<\/a><\/li>\n<li><a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/progressive-enhancement\/\">\u30d7\u30ed\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/a><\/li>\n<li>\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/li>\n<\/ul>\n<p>\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8\u306f\u3001\u57fa\u672c\u7684\u306a\u958b\u767a\u624b\u6cd5\u306f<a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/graceful-degradation\/\">\u30b0\u30ec\u30a4\u30b9\u30d5\u30eb\u30c7\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3<\/a>\u3068\u540c\u3058\u304f\u3001\u65b0\u3057\u3044\u30d6\u30e9\u30a6\u30b6\u3092\u57fa\u6e96\u306b\u52d5\u4f5c\u3059\u308b\u3088\u3046\u5b9f\u88c5\u3059\u308b\u3002\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3057\u306a\u3044\u90e8\u5206\u306b\u5bfe\u3057\u3066\u306f\u3001js\u30e9\u30a4\u30d6\u30e9\u30ea\u7b49\u3092\u99c6\u4f7f\u3057\u3066\u540c\u7b49\u306e\u88c5\u98fe\u304c\u3067\u304d\u308b\u3088\u3046\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u65b0\u65e7\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u8868\u73fe\u3084\u632f\u308b\u821e\u3044\u3092\u5909\u3048\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u958b\u767a\u624b\u6cd5\u3067\u3042\u308b\u3002\u305d\u306e\u305f\u3081\u306b<strong>Polyfill<\/strong>\u3068\u3044\u3046\u3001\u65b0\u3057\u3044\u30d6\u30e9\u30a6\u30b6\u3068\u540c\u69d8\u306e\u8868\u73fe\u30fb\u632f\u308b\u821e\u3044\u3092\u5b9f\u88c5\u3059\u308b\u624b\u6cd5\u3092\u7528\u3044\u308b\u3002<\/p>\n<div id=\"attachment_17941\" style=\"width: 511px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17941\" class=\"wp-image-17941\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/image-regressive-enhancement-300x106.png\" alt=\"\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8\u306e\u30a4\u30e1\u30fc\u30b8\u56f3\" width=\"501\" height=\"177\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/image-regressive-enhancement-300x106.png 300w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/image-regressive-enhancement.png 685w\" sizes=\"auto, (max-width: 501px) 100vw, 501px\" \/><p id=\"caption-attachment-17941\" class=\"wp-caption-text\">\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8\u306e\u30a4\u30e1\u30fc\u30b8<\/p><\/div>\n<p><a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/graceful-degradation\/\">\u30b0\u30ec\u30a4\u30b9\u30d5\u30eb\u30c7\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3<\/a>\u3068<a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/progressive-enhancement\/\">\u30d7\u30ed\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/a>\u306f\u3001\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u5fc5\u8981\u6700\u4f4e\u9650\u306e\u6a5f\u80fd\u306e\u307f\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u5b9f\u88c5\u3059\u308b\u304c\u3001\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8\u306f\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u3082\u65b0\u3057\u3044\u30d6\u30e9\u30a6\u30b6\u3068\u540c\u7b49\u306e\u88c5\u98fe\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/p>\n<div id=\"attachment_17944\" style=\"width: 534px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17944\" class=\"wp-image-17944\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/position-re-300x169.png\" alt=\"\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8\u306e\u4f4d\u7f6e\u4ed8\u3051\" width=\"524\" height=\"296\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/position-re-300x169.png 300w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/position-re-1024x576.png 1024w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/position-re-768x432.png 768w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/position-re.png 1280w\" sizes=\"auto, (max-width: 524px) 100vw, 524px\" \/><p id=\"caption-attachment-17944\" class=\"wp-caption-text\">3\u3064\u306e\u958b\u767a\u624b\u6cd5\u306e\u307e\u3068\u3081<\/p><\/div>\n<h2>js\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f8b<\/h2>\n<p>HTML5\u3067\u4f5c\u6210\u3057\u305f\u30b5\u30a4\u30c8\u3092Internet Explorer8\u3067\u8868\u793a\u3059\u308b\u3068\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5d29\u308c\u305f\u308a\u3001\u88c5\u98fe\u304c\u53cd\u6620\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308b\u3002<a href=\"https:\/\/github.com\/aFarkas\/html5shiv\">HTML5 Shiv.js<\/a>\u3068\u3044\u3046js\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3059\u308b\u3068HTML5\u3067\u5b9f\u88c5\u3057\u305f\u753b\u9762\u3092Internet Explorer8\u3067\u3082\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n<div id=\"attachment_17942\" style=\"width: 458px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17942\" class=\"wp-image-17942\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/nothing-html5shiv-300x195.png\" alt=\"HTML5\u3092Internet Explore8\u3067\u958b\u3044\u305f\u753b\u9762\" width=\"448\" height=\"291\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/nothing-html5shiv-300x195.png 300w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/nothing-html5shiv-1024x666.png 1024w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/nothing-html5shiv-768x500.png 768w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/nothing-html5shiv.png 1468w\" sizes=\"auto, (max-width: 448px) 100vw, 448px\" \/><p id=\"caption-attachment-17942\" class=\"wp-caption-text\">HTML5\u306e\u30b5\u30a4\u30c8\u3092Internet Explore8\u3067\u958b\u304f\u3068\u6b63\u3057\u304f\u8868\u793a\u3055\u308c\u306a\u3044<\/p><\/div>\n<div id=\"attachment_17943\" style=\"width: 469px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17943\" class=\"wp-image-17943\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/use-html5shiv-300x196.png\" alt=\"Shiv.js\u3092\u4f7f\u7528\u3057\u305f\u753b\u9762\" width=\"459\" height=\"300\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/use-html5shiv-300x196.png 300w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/use-html5shiv-1024x669.png 1024w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/use-html5shiv-768x502.png 768w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2020\/01\/use-html5shiv.png 1461w\" sizes=\"auto, (max-width: 459px) 100vw, 459px\" \/><p id=\"caption-attachment-17943\" class=\"wp-caption-text\">HTML5 Shiv.js\u3092\u5229\u7528\u3059\u308b\u3068\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b <br \/>\u53c2\u8003\uff1a<a href=\"https:\/\/webkaru.net\/html5\/ie-html5shiv\/\">IE\u5bfe\u5fdc\u300chtml5shiv.js\u300d\u306e\u4f7f\u3044\u65b9<\/a><\/p><\/div>\n<h2>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u554f\u984c\u304c\u8d77\u3053\u308b\u5834\u5408\u304c\u3042\u308b<\/h2>\n<p>Polyfill\u7528\u306ejs\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u306b\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8a08\u6e2c\u3057\u3066\u51e6\u7406\u304c\u91cd\u304f\u306a\u308a\u3059\u304e\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002js\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30b9\u30c8\u3092\u524a\u6e1b\u3067\u304d\u308b\u3002\u305f\u3060\u3057\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u81ea\u8eab\u3067\u5b9f\u88c5\u3057\u305f\u3082\u306e\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u4ed5\u69d8\u3092\u6b63\u3057\u304f\u628a\u63e1\u3057\u3001\u5f71\u97ff\u7bc4\u56f2\u3082\u8003\u616e\u3057\u3066\u304b\u3089\u5c0e\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n<h2>3\u3064\u306e\u958b\u767a\u624b\u6cd5\u306e\u958b\u767a\u30b3\u30b9\u30c8<\/h2>\n<p>\u30c6\u30b9\u30c8\u306e\u4ed5\u65b9\u3084\u7bc4\u56f2\u3082\u3042\u308b\u305f\u3081\u4e00\u6982\u306b\u306f\u8a00\u3048\u306a\u3044\u304c\u30013\u3064\u306e\u958b\u767a\u624b\u6cd5\u306e\u958b\u767a\u30b3\u30b9\u30c8\u306f\u4ee5\u4e0b\u306e\u9806\u3067\u4f4e\u3044\u3002<\/p>\n<h3>1.<a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/progressive-enhancement\/\">\u30d7\u30ed\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/a><\/h3>\n<p>\u57fa\u672c\u6a5f\u80fd\u306f\u3059\u3079\u3066\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3059\u308b\u3088\u3046HTML\u30d9\u30fc\u30b9\u3067\u5b9f\u88c5\u3059\u308b\u305f\u3081\u3001\u30d6\u30e9\u30a6\u30b6\u3054\u3068\u306b\u30b3\u30fc\u30c9\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u304c\u306a\u3044\u3002<\/p>\n<h3>2.\u30ea\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/h3>\n<p>\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u306b\u306f\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5bfe\u5fdc\u3059\u308b\u5206\u3001\u521d\u671f\u30ea\u30ea\u30fc\u30b9\u30b3\u30b9\u30c8\u306f\u4f4e\u3044\u3002\u305d\u306e\u5f8c\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4ed5\u69d8\u306e\u5909\u66f4\u306b\u3088\u308b\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b3\u30b9\u30c8\u304c\u767a\u751f\u3059\u308b\u3002<\/p>\n<h3>3.<a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/graceful-degradation\/\">\u30b0\u30ec\u30a4\u30b9\u30d5\u30eb\u30c7\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3<\/a><\/h3>\n<p>\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u306b\u306f\u5225\u306e\u30b3\u30fc\u30c9\u3092\u7528\u610f\u3059\u308b\u305f\u3081\u958b\u767a\u30b3\u30b9\u30c8\u304c\u9ad8\u3044\u3002\u307e\u305f\u65b0\u65e7\u306e\u30b3\u30fc\u30c9\u3092\u4e8c\u91cd\u3067\u7ba1\u7406\u3057\u3066\u3044\u304f\u305f\u3081\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30b3\u30b9\u30c8\u3082\u9ad8\u3044\u3002<\/p>\n<h2>\u95a2\u9023\u7528\u8a9e<\/h2>\n<ul>\n<li><a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/graceful-degradation\/\">\u30b0\u30ec\u30a4\u30b9\u30d5\u30eb\u30c7\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3<\/a><\/li>\n<li><a href=\"https:\/\/uxdaystokyo.com\/articles\/glossary\/progressive-enhancement\/\">\u30d7\u30ed\u30b0\u30ec\u30c3\u30b7\u30d6\u30a8\u30f3\u30cf\u30f3\u30b9\u30e1\u30f3\u30c8<\/a><\/li>\n<\/ul>\n<h2>\u95a2\u9023\u30b5\u30a4\u30c8<\/h2>\n<ul>\n<li><a href=\"https:\/\/webkaru.net\/html5\/ie-html5shiv\/\">IE\u5bfe\u5fdc\u300chtml5shiv.js\u300d\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Polyfill\">Polyfill (programming) -Wikipedia<\/a><\/li>\n<li><a href=\"https:\/\/www.mitsue.co.jp\/knowledge\/blog\/frontend\/201710\/30_1154.html\">Polyfill\u3068\u5171\u306b\u6b69\u3093\u3067\u3044\u304f\u305f\u3081\u306b\u77e5\u3063\u3066\u304a\u304d\u305f\u3044\u3053\u3068<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u65b0\u3057\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3059\u308b\u3088\u3046Web\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3057\u3001\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u4f5c\u3057\u306a\u3044\u5834\u5408\u306fjs\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u3069\u3092\u7528\u3044\u3066\u540c\u7b49\u306e\u88c5\u98fe\u3092\u5b9f\u88c5\u3059\u308b\u958b\u767a\u624b\u6cd5<\/p>\n","protected":false},"author":61,"featured_media":17943,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"English":"Regressive 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