{"id":948,"date":"2019-01-24T21:57:38","date_gmt":"2019-01-24T12:57:38","guid":{"rendered":"http:\/\/domore.co.jp\/speedcurve\/?p=948"},"modified":"2019-01-15T12:17:37","modified_gmt":"2019-01-15T03:17:37","slug":"techniques-4","status":"publish","type":"post","link":"https:\/\/www.domore.co.jp\/speedcurve\/tech\/techniques-4\/","title":{"rendered":"\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30ea\u30bd\u30fc\u30b9\u3092\u8a08\u6e2c\u3059\u308b"},"content":{"rendered":"<h1><b>\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30ea\u30bd\u30fc\u30b9\u3092\u8a08\u6e2c\u3059\u308b<\/b><\/h1>\n<p>\u76ee\u7684\uff1a\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u30d6\u30ed\u30c3\u30af\u306e\u4e3b\u72af\u306f\u3001\u540c\u671f\u3057\u3066\u8aad\u307f\u8fbc\u307e\u308c\u308bJavaScript\u3068\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\uff08CSS)\u3067\u3059<\/p>\n<p><img loading=\"lazy\" class=\" wp-image-344 alignnone\" src=\"http:\/\/domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/11\/steve.jpg\" alt=\"\" width=\"100\" height=\"100\" srcset=\"https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/11\/steve.jpg 128w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/11\/steve-60x60.jpg 60w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/11\/steve-120x120.jpg 120w\" sizes=\"(max-width: 100px) 100vw, 100px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Steve Souders\u30002017\u5e742\u67082\u65e5\u6728\u66dc\u65e5<\/span><\/p>\n<p><span style=\"font-weight: 400;\">SpeedCurve\u306f\u3001\u30da\u30fc\u30b8\u5185\u306e\u30d6\u30ed\u30c3\u30af\u30ea\u30bd\u30fc\u30b9\u6570\u3092\u5831\u544a\u3057\u307e\u3059\u3002 \u3053\u308c\u3089\u306f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30ea\u30bd\u30fc\u30b9\u3067\u3059\u3002 \u3059\u3070\u3084\u304f\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u898b\u308b\u3053\u3068\u304c\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u5927\u5207\u306a\u306e\u3067\u3001\u306a\u306b\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u9045\u304f\u3055\u305b\u3066\u3044\u308b\u304b\u3092\u8abf\u3079\u308b\u306e\u306f\u91cd\u8981\u3067\u3059\u3002 \u6211\u3005\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30ea\u30bd\u30fc\u30b9\u3092\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5\u3092\u5f37\u5316\u3057\u3001\u3053\u3046\u3057\u305f\u6539\u5584\u70b9\u3092\u9867\u5ba2\u3060\u3051\u3067\u306a\u304f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3067\u5171\u6709\u3057\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3057\u305f\u3002<\/span><\/p>\n<p><b>\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u4e3b\u72af\u4eba\u306f\u3001\u540c\u671f\u3057\u3066\u8aad\u307f\u8fbc\u307e\u308c\u308bJavaScript\u3068\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\uff08CSS)\u3067\u3059<\/b><span style=\"font-weight: 400;\">\u3002 \u3053\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u3068\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3092<strong>\u975e\u540c\u671f<\/strong>\u306b\u3057\u3066\u8aad\u307f\u8fbc\u3080\u3053\u3068\u3067\u3059\u3002 <\/span><a href=\"https:\/\/www.w3.org\/TR\/html5\/scripting-1.html#attr-script-async\"><span style=\"font-weight: 400;\">async<\/span><\/a><span style=\"font-weight: 400;\">\u5c5e\u6027\u3068<\/span><a href=\"https:\/\/www.w3.org\/TR\/html5\/scripting-1.html#attr-script-defer\"><span style=\"font-weight: 400;\">defer<\/span><\/a><span style=\"font-weight: 400;\">\u5c5e\u6027\u3001\u304a\u3088\u3073\u4ed6\u306e<\/span><a href=\"https:\/\/www.stevesouders.com\/blog\/2009\/04\/27\/loading-scripts-without-blocking\/\"><span style=\"font-weight: 400;\">\u30d7\u30ed\u30b0\u30e9\u30e0\u7684\u306a\u624b\u6cd5<\/span><\/a><span style=\"font-weight: 400;\">\u3067\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u5bfe\u3057\u3066\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/span><b>\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3092\u975e\u540c\u671f\u3067\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u306f\u4e00\u822c\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001 <\/b><a href=\"https:\/\/github.com\/filamentgroup\/loadCSS\"><b>loadCSS<\/b><\/a><b>\u306a\u3069\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u3082\u53ef\u80fd\u3067\u3059\u3002<\/b><\/p>\n<p><span style=\"font-weight: 400;\">SpeedCurve\u3067\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3092\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5\u3092\u6539\u5584\u3057\u307e\u3057\u305f\u3002 \u6700\u521d\u306e\u5909\u66f4\u306f\u3001loadCSS\u3092\u4ecb\u3057\u3066\u8aad\u307f\u8fbc\u307e\u308c\u305f\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u3067\u3059\u3002 \u3053\u308c\u3089\u306f\u975e\u540c\u671f\u3067\u3042\u308a\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u305b\u3093\u3002 \u540c\u69d8\u306b\u3001<\/span><b>\u6700\u521d\u306b <\/b><a href=\"https:\/\/www.smashingmagazine.com\/2016\/02\/preload-what-is-it-good-for\/#markup-based-async-loader\"><b>link-rel-preload<\/b><\/a><b> \u7d4c\u7531\u3067\u30ed\u30fc\u30c9\u3055\u308c\u3001\u5f8c\u306bDOM\u306b\u52d5\u7684\u306b\u8ffd\u52a0\u3055\u308c\u308b\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u306f\u7121\u8996\u3055\u308c\u307e\u3059\u3002<\/b><span style=\"font-weight: 400;\"> \u6700\u5f8c\u306b\u3001\u300cprint\u300d\u30e1\u30c7\u30a3\u30a2\u30bf\u30a4\u30d7\u306e\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u306f\u7121\u8996\u3057\u307e\u3059\u3002 \u81ea\u793e\u30b5\u30a4\u30c8\u3067\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001SpeedCurve\u30e1\u30c8\u30ea\u30c3\u30af\u304c\u6e1b\u3089\u305d\u3046\u3068\u3059\u308b &#8220;Blocking CSS&#8221;\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u6e2c\u5b9a\u65b9\u6cd5\u3082\u6539\u5584\u3057\u307e\u3057\u305f\u3002 \u3057\u304b\u3057\u3001\u3053\u306e\u89e3\u8aac\u306b\u5165\u308b\u524d\u306b\u3001<\/span><b>\u30b9\u30af\u30ea\u30d7\u30c8\u3068\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u65b9\u6cd5\u306e\u5fae\u5999\u306a\u9055\u3044<\/b><span style=\"font-weight: 400;\">\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u3087\u3046\u3002 \u540c\u671f\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u306f\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304b\u3089DOM\u5168\u4f53\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002 \u305f\u3060\u3057\u3001\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001DOM\u30c4\u30ea\u30fc\u306eSCRIPT\u30bf\u30b0\u306b\u7d9a\u304f\u8981\u7d20\u306e\u307f\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002 <\/span><b>\u4e0b\u306e\u56f3\u306f\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092<\/b><b>\u8d64<\/b><b>\u3067\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/b><span style=\"font-weight: 400;\"> \u975e\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u3068\u9045\u5ef6\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001DOM\u5185\u306e\u3069\u3053\u306b\u3042\u3063\u3066\u3082\u3001\u5e38\u306b\u7dd1\u8272\uff08\u975e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\uff09\u3067\u3059\u3002 \u305f\u3060\u3057\u3001\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u3042\u308bDOM\u8981\u7d20\u306e\u4e0a\u306eHEAD\u306e\u4e2d\u3084BODY\u5185\u306b\u5b58\u5728\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u8868\u793a\u3055\u308c\u3066\u3044\u308bDOM\u306e\u4e0b\u3067\u767a\u751f\u3057\u3066\u3082\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u305b\u3093\u3002<\/span><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-949 size-large\" src=\"http:\/\/domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/12\/blocking-993x1024.png\" alt=\"\" width=\"993\" height=\"1024\" srcset=\"https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/12\/blocking-993x1024.png 993w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/12\/blocking-291x300.png 291w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/12\/blocking-768x792.png 768w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/12\/blocking.png 1098w\" sizes=\"(max-width: 993px) 100vw, 993px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">\u3053\u308c\u306f\u3001\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0JS\u306e\u8a08\u6e2c\u65b9\u6cd5\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u6700\u9069\u5316\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002 \u30da\u30fc\u30b8\u306e\u4e0b\u90e8\u306b\uff08\u3059\u3079\u3066\u306e\u8868\u793a\u53ef\u80fd\u306aDOM\u8981\u7d20\u306e\u4e0b\u306b\uff09\u30da\u30fc\u30b8\u304c\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u6301\u3064\u5834\u5408\u3001\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u305b\u3093\uff08\u8868\u793a\u53ef\u80fd\u306aDOM\u8981\u7d20\u304cSCRIPT\u30bf\u30b0\u306e\u524d\u306b\u3042\u308b\u305f\u3081\uff09\u3002<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u6b63\u78ba\u306b\u6e2c\u5b9a\u3059\u308b\u305f\u3081\u306b\u3001SpeedCurve\u306f\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u540c\u671f\u304b\u975e\u540c\u671f\u304b\u3092\u8ffd\u8de1\u3059\u308b\u3060\u3051\u3067\u306f\u306a\u304f\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002 \u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u5185\u306eDOM\u8981\u7d20\u306e\u524d\u306b\u767a\u751f\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002 <\/span><b>\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u540c\u671f\u3057\u3066\u30ed\u30fc\u30c9\u3055\u308c\u3001\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u5185\u306eDOM\u8981\u7d20\u306e\u524d\u306b\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u300c\u30d6\u30ed\u30c3\u30afJS\u300d\u3068\u3057\u3066\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u3059<\/b><span style=\"font-weight: 400;\">\u3002 \u3059\u3079\u3066\u306e\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306eDOM\u8981\u7d20\u306e\u5f8c\u306b\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\uff08\u540c\u671f\u3057\u3066\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3044\u3066\u3082\uff09\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3068\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u305b\u3093\u3002<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u3053\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u30da\u30fc\u30b8\u306e\u672c\u6587\u306b\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u3042\u308b\u5834\u5408\u3001\u300cBlocking JS\u300d\u306eSpeedCurve\u30e1\u30c8\u30ea\u30c3\u30af\u304c\u6e1b\u5c11\u3057\u307e\u3059\u3002 \u79c1\u305f\u3061\u306e\u305f\u3081\u306b\u3084\u308a\u307e\u3057\u305f\uff01 SpeedCurve.com\u306e\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u30c1\u30e3\u30fc\u30c8\u304c\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4ecb\u3057\u3066\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306e\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3059\u3079\u3066\u8868\u793a\u3055\u308c\u308bDOM\u306e\u4e0b\u306b\u3042\u308a\u307e\u3059\u3002 <\/span><b>\u305d\u306e\u305f\u3081\u6211\u3005\u306eBlocking JS\u6307\u6a19\u306f4\u304b\u30890\u306b\u843d\u3061\u307e\u3057\u305f\uff01<\/b><span style=\"font-weight: 400;\"> 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