{"id":1923,"date":"2019-07-03T19:40:21","date_gmt":"2019-07-03T10:40:21","guid":{"rendered":"http:\/\/domore.co.jp\/speedcurve\/?p=1923"},"modified":"2019-07-17T18:30:36","modified_gmt":"2019-07-17T09:30:36","slug":"preload-scripts","status":"publish","type":"post","link":"https:\/\/www.domore.co.jp\/speedcurve\/column\/preload-scripts\/","title":{"rendered":"\u30d7\u30ea\u30ed\u30fc\u30c9\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u3064\u3044\u3066"},"content":{"rendered":"<p><img loading=\"lazy\" class=\"wp-image-344 alignnone\" src=\"http:\/\/domore.co.jp\/speedcurve\/wp-content\/uploads\/2018\/11\/steve.jpg\" alt=\"\" width=\"64\" height=\"64\" 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: 64px) 100vw, 64px\" \/>Steve Souders<\/p>\n<p>2019\u5e741\u670822\u65e5\u706b\u66dc\u65e5<\/p>\n<p>\u524d\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001<a href=\"https:\/\/speedcurve.com\/blog\/load-scripts-async\/\">\u975e\u540c\u671f\u3067\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30ed\u30fc\u30c9\u3059\u308b[\u82f1\u8a9e]<\/a>\u3053\u3068\u3067JavaScript\u306e\u5f71\u97ff\u304c\u8efd\u6e1b\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u304c(\u591a\u304f)\u9ad8\u901f\u306b\u306a\u308b\u3053\u3068\u3092\u8aac\u660e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u305f\u3068\u3048\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u975e\u540c\u671f\u3067\u30ed\u30fc\u30c9\u3055\u308c\u305f\u3068\u3057\u3066\u3082\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u306f\u6700\u521d\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5230\u7740\u3059\u308b\u306e\u3092\u5f85\u3064\u305f\u3081\u306b\u3001\u4e00\u79d2\u304b\u305d\u308c\u4ee5\u4e0a\u89aa\u6307\u3092\u56de\u3057\u7d9a\u3051\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u306e\u9045\u5ef6\u3092\u6e1b\u3089\u3059\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306blink rel=preload\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>&lt;link rel=&#8221;preload&#8221; href=&#8221;main.js&#8221; as=&#8221;script&#8221;&gt;<br \/>\nLink rel=preload\u306f\u3001\u91cd\u8981\u306aCSS\u3092\u542b\u3080\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u3001\u91cd\u8981\u306a\u8a2d\u8a08\u8981\u7d20\u3067\u4f7f\u7528\u3055\u308c\u308b\u30d5\u30a9\u30f3\u30c8\u3001\u30d2\u30fc\u30ed\u30fc\u30fb\u30a4\u30e1\u30fc\u30b8\u306a\u3069\u3001\u91cd\u8981\u306a\u30ea\u30bd\u30fc\u30b9\u3092\u3088\u308a\u8fc5\u901f\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u306f\u3001\u30da\u30fc\u30b8\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3001\u30da\u30fc\u30b8\u306e\u30ed\u30fc\u30c9\u4e2d\u306bCPU\u3092\u6700\u3082\u591a\u304f\u6d88\u8cbb\u3059\u308b\u305f\u3081\u3001\u7279\u306b\u91cd\u8981\u3067\u3059\u3002(\u3053\u306e\u30c8\u30d4\u30c3\u30af\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u306e\u30b7\u30ea\u30fc\u30ba\u306e\u6b21\u56de\u306e\u8a18\u4e8b\u3067\u8aac\u660e\u3057\u307e\u3059\u3002)<\/p>\n<p>as\u5c5e\u6027\u3092\u542b\u3081\u308b\u3053\u3068\u306f\u91cd\u8981\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306f\u3001\u3053\u306e\u5024\u3092\u4f7f\u7528\u3057\u3066\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306e\u512a\u5148\u9806\u4f4d\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u6307\u5b9a\u3067\u304d\u308b\u5024\u306f\u3001script\u3001style\u3001font\u3001image\u3001video\u3001audio\u306a\u3069\u3067\u3059\u3002\u30d7\u30ea\u30ed\u30fc\u30c9\u306f\u3001\u672c\u5f53\u306b\u91cd\u8981\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u306e\u307f\u4f7f\u7528\u3057\u307e\u3059\u3002\u305d\u3046\u3057\u306a\u3044\u3068\u3001\u91cd\u8981\u5ea6\u306e\u4f4e\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u5e2f\u57df\u5e45\u3068CPU\u3092\u6d88\u8cbb\u3057\u3001\u91cd\u8981\u5ea6\u306e\u9ad8\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5834\u5408\u3001\u3053\u306e\u30da\u30fc\u30b8\u306e\u6700\u521d\u306e\u3044\u304f\u3064\u304b\u306e\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u306f\u3001link rel=preload\u304c\u6700\u9069\u3067\u3059\u3002<\/p>\n<p>Link rel=preload\u306f\u3057\u3070\u3089\u304f\u524d\u304b\u3089\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u958b\u767a\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3067\u306f\u3042\u307e\u308a\u77e5\u3089\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u308c\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001<a href=\"https:\/\/www.chromestatus.com\/metrics\/feature\/timeline\/popularity\/901\">Chrome<\/a>\u3092\u4f7f\u3063\u3066\u8a2a\u308c\u305f\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u306e25%\u306b\u3053\u306e\u6a5f\u80fd\u304c\u3042\u308b\u3068Chrome\u306f\u5831\u544a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-1924\" src=\"http:\/\/domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload.jpeg\" alt=\"\" width=\"1002\" height=\"506\" srcset=\"https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload.jpeg 1002w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-300x150.jpeg 300w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-768x388.jpeg 768w\" sizes=\"(max-width: 1002px) 100vw, 1002px\" \/><\/p>\n<p>\u3057\u304b\u3057\u3001\u3053\u308c\u306flink rel=preload\u306e\u63a1\u7528\u3092\u8a87\u5f35\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002link rel=preload\u306e\u3059\u3079\u3066\u306e\u4f7f\u7528\u3092\u542b\u3081\u308b\u4ee3\u308f\u308a\u306b\u3001<a href=\"https:\/\/discuss.httparchive.org\/t\/resource-hints-adoption\/1461\/8?u=stevesoudersorg\">HTTP\u30a2\u30fc\u30ab\u30a4\u30d6\u30fb\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066[\u82f1\u8a9e]<\/a>\u3001link rel=preload\u3092\u4f7f\u7528\u3057\u3066\u30da\u30fc\u30b8\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306e\u6570\u3092\u5206\u6790\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u6570\u5b57\u306f1%\u306b\u8fd1\u3044\u3053\u3068\u304c\u308f\u304b\u3063\u305f(1,255,904\u30da\u30fc\u30b8\u4e2d12,469\u30da\u30fc\u30b8)\u3002\u3053\u306e\u8996\u899a\u5316\u306f\u3001\u79c1\u306e\u4e3b\u5f35\u3092\u660e\u78ba\u306b\u3057\u3066\u304f\u308c\u307e\u3057\u305f\u3002<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-large wp-image-1925\" src=\"http:\/\/domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-ha-1024x578.jpeg\" alt=\"\" width=\"1024\" height=\"578\" srcset=\"https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-ha.jpeg 1024w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-ha-300x169.jpeg 300w, https:\/\/www.domore.co.jp\/speedcurve\/wp-content\/uploads\/2019\/07\/link-rel-preload-ha-768x434.jpeg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>\u30d6\u30e9\u30a6\u30b6\u306b\u306fPreloader\u304c\u5185\u8535\u3055\u308c\u3066\u3044\u3066\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u304c\u65e9\u304f\u306a\u308a\u307e\u3059\u3002HTML\u6587\u66f8\u306e\u69cb\u9020\u306b\u3088\u3063\u3066\u306f\u3001\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u3067link rel=preload\u3092\u4f7f\u7528\u3059\u308b\u3068\u3055\u3089\u306b\u9ad8\u901f\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u6b21\u306e\u3088\u3046\u306bHTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u3068\u3057\u3066\u63d0\u4f9b\u3059\u308b\u3068\u3001\u3088\u308a\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Link: &lt;main.js&gt;; rel=&#8221;preload&#8221;; as=&#8221;script&#8221;<\/p>\n<p>\u3053\u306eHTTP\u5fdc\u7b54\u30d8\u30c3\u30c0\u30fc\u306fHTML\u306e\u524d\u306b\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u53d7\u4fe1\u3055\u308c\u308b\u305f\u3081\u3001\u306f\u30b9\u30af\u30ea\u30d7\u30c8\u8981\u6c42\u3092\u3088\u308a\u65e9\u304f\u958b\u59cb\u3067\u304d\u307e\u3059\u3002\u4e00\u90e8\u306e\u30d6\u30e9\u30a6\u30b6\u30fc\u306f\u307e\u3060link rel=preload response\u30d8\u30c3\u30c0\u30fc\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u305f\u3081\u3001HTTP\u5fdc\u7b54\u30d8\u30c3\u30c0\u30fc\u3068\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u306e\u4e21\u65b9\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u305f\u3081\u3001\u30e6\u30fc\u30b6\u306e\u64cd\u4f5c\u304c\u9045\u304f\u611f\u3058\u3089\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u3063\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u4eca\u65e5\u306e\u307b\u3068\u3093\u3069\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u540c\u671f\u7684\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059(\u975e\u540c\u671f\u3067\u306f\u306a\u304f)\u3002\u305d\u308c\u3067\u3082\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306blink rel=preload\u3092\u4f7f\u3063\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306f1%\u306b\u3059\u304e\u307e\u305b\u3093\u3002\u30b5\u30a4\u30c8\u306b\u540c\u671f\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u305d\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u5bfe\u3057\u3066link rel=preload\u3092\u8ffd\u52a0\u3059\u308bA\/B\u30c6\u30b9\u30c8\u3092\u884c\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u304a\u305d\u3089\u304f\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u3001\u3088\u308a\u697d\u3057\u3044\u4f53\u9a13\u3092\u751f\u307f\u51fa\u3059\u306e\u306b\u5f79\u7acb\u3064\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u95a2\u9023\u8a18\u4e8b\u3000<a href=\"https:\/\/speedcurve.com\/blog\/load-scripts-async\/\">https:\/\/speedcurve.com\/blog\/load-scripts-async\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Steve Souders 2019\u5e741\u670822\u65e5\u706b\u66dc\u65e5 \u524d\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u975e\u540c\u671f\u3067\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30ed\u30fc\u30c9\u3059\u308b[\u82f1\u8a9e]\u3053\u3068\u3067JavaScript\u306e\u5f71\u97ff\u304c\u8efd\u6e1b\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u304c(\u591a\u304f)\u9ad8\u901f\u306b\u306a\u308b\u3053\u3068\u3092\u8aac\u660e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u305f\u3068\u3048\u30b9\u30af [&hellip;]","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/posts\/1923"}],"collection":[{"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/comments?post=1923"}],"version-history":[{"count":0,"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/posts\/1923\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/media?parent=1923"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/categories?post=1923"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.domore.co.jp\/speedcurve\/wp-json\/wp\/v2\/tags?post=1923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}