{"id":24387,"date":"2019-10-08T06:28:52","date_gmt":"2019-10-08T13:28:52","guid":{"rendered":"https:\/\/kinsta.com\/?p=54531"},"modified":"2023-08-29T08:24:43","modified_gmt":"2023-08-28T23:24:43","slug":"defer-parsing-of-javascript","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/","title":{"rendered":"WordPress\u3067Javascript\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\uff084\u3064\u306e\u89e3\u6c7a\u7b56\uff09"},"content":{"rendered":"<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/debugging-wordpress-performance\/\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb<\/a>\u3067WordPress\u30b5\u30a4\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u308b\u3068\u3001JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3088\u3046\u30a2\u30c9\u30d0\u30a4\u30b9\u304c\u3002\u305d\u3093\u306a\u7d4c\u9a13\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u5909\u66f4\u306e\u5b9f\u88c5\u306f\u3001\u30b5\u30a4\u30c8\u306e\u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u6642\u9593\u306b\u30d7\u30e9\u30b9\u306e\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u2014\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u2014\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306a\u30a2\u30c9\u30d0\u30a4\u30b9\u306e\u7406\u89e3\u306f\u3001\u6642\u306b\u96e3\u3057\u3044\u3082\u306e\u3002\u305d\u3053\u3067\u3001JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3053\u3068\u306e\u610f\u5473\u3068\u3001WordPress\u30b5\u30a4\u30c8\u3067\u3053\u306e\u5909\u66f4\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u3092\u6b63\u78ba\u306b\u3054\u8aac\u660e\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u3093\u306a\u5185\u5bb9\u3092\u6271\u3044\u307e\u3059\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<p>\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u306b\u76f4\u63a5\u30b9\u30ad\u30c3\u30d7\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u3001\u4e0a\u306e\u30ea\u30b9\u30c8\u306e\u6700\u5f8c\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><a id=\"what\"><\/a>WordPress\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3053\u3068\u306e\u610f\u5473\u3068\u306f\uff1f<\/h2>\n<p>WordPress\u30b5\u30a4\u30c8\u3092<a href=\"https:\/\/kinsta.com\/jp\/blog\/google-pagespeed-insights\/\">Google PageSpeed Insights\uff08\u30da\u30fc\u30b8\u30b9\u30d4\u30fc\u30c9\u30a4\u30f3\u30b5\u30a4\u30c8\uff09<\/a>\u3001GTmetrix\u306a\u3069\u306e\u30da\u30fc\u30b8\u30b9\u30d4\u30fc\u30c9\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3067\u30c1\u30a7\u30c3\u30af\u3057\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u304b\uff1f\u305d\u3053\u3067\u3001\u300cJavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u300d\u3068\u3044\u3046\u63d0\u6848\u306b\u51fa\u304f\u308f\u3057\u305f\u3053\u3068\u304c\u3042\u308b\u306f\u305a\u3002<\/p>\n<p>\u3067\u3082\u2026\u5b9f\u969b\u3001\u4f55\u3092\u610f\u5473\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306e\u305f\u3081\u306b\u3053\u308c\u3092\u8003\u616e\u3059\u3079\u304d\u7406\u7531\u3068\u306f\uff1f<\/p>\n<p>\u57fa\u672c\u7684\u306b\u3001\u8ab0\u304b\u304c<a href=\"https:\/\/kinsta.com\/jp\/blog\/wordpress-site-examples\/\">WordPress\u30b5\u30a4\u30c8<\/a>\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u3042\u306a\u305f\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306eHTML\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u305d\u306e\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u914d\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u4e0a\u90e8\u304b\u3089\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3001\u30b5\u30a4\u30c8\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3057\u307e\u3059\u3002 \u4e0a\u304b\u3089\u4e0b\u306b\u79fb\u52d5\u3059\u308b\u3068\u304d\u306bJavaScript\u304c\u898b\u3064\u304b\u3063\u305f\u5834\u5408\u3001JavaScript\u30d5\u30a1\u30a4\u30eb\u3092\u53d6\u5f97\u3057\u3066\u89e3\u6790\u3067\u304d\u308b\u307e\u3067\u3001\u30da\u30fc\u30b8\u306e\u6b8b\u308a\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306f\u505c\u6b62\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u898b\u3064\u304b\u308b\u305f\u3073\u306b\u3001\u3053\u308c\u304c\u8d77\u3053\u308a\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u304c\u3059\u3079\u3066\u306eJavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u89e3\u6790\u3059\u308b\u9593\u2014\u8a2a\u554f\u8005\u306f\u7a7a\u767d\u306e\u753b\u9762\u3092\u898b\u3064\u3081\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u2014\u30b5\u30a4\u30c8\u306e\u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u6642\u9593\u306b\u306f\u3001\u60aa\u5f71\u97ff\u304c\u3082\u305f\u3089\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u306e\u4e2d\u6838\u3068\u306a\u308b\u6a5f\u80fd\u306b\u7279\u5b9a\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5fc5\u8981\u306a\u3044\u5834\u5408\u306b\u306f\uff08\u5c11\u306a\u304f\u3068\u3082\u3001\u6700\u521d\u306e\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u6642\uff09\u3001\u30b5\u30a4\u30c8\u306e\u3088\u308a\u91cd\u8981\u306a\u90e8\u5206\u306e\u8aad\u307f\u8fbc\u307f\u306e\u90aa\u9b54\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u3057\u305f\u3044\u3082\u306e\u3067\u3059\u3002\u3060\u304b\u3089\u3053\u305d\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/pingdom-speed-test\/\">\u30da\u30fc\u30b8\u30b9\u30d4\u30fc\u30c9\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb<\/a>\u304b\u3089\u306f\u5e38\u306b\u3001\u300cJavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3088\u3046\u300d\u6307\u793a\u304c\u51fa\u3055\u308c\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u305d\u3082\u305d\u3082\u3001JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3001\u3068\u306f\u3069\u3046\u3044\u3046\u610f\u5473\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u57fa\u672c\u7684\u306b\u3001\u30b5\u30a4\u30c8\u306f\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u3001\u30b5\u30a4\u30c8\u306e\u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u8aad\u307f\u8fbc\u307f\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067\u3001JavaScript\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3084\u89e3\u6790\u3092\u5f85\u3064\u3088\u3046\u306b\u6307\u793a\u3057\u307e\u3059\u3002\u305d\u306e\u6642\u70b9\u3067\u3001\u8a2a\u554f\u8005\u306f\u3059\u3067\u306b\u30da\u30fc\u30b8\u3092\u8868\u793a\u3057\u64cd\u4f5c\u3067\u304d\u308b\u306e\u3067\u3001\u305d\u306eJavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u89e3\u6790\u3059\u308b\u305f\u3081\u306e\u5f85\u6a5f\u6642\u9593\u306f\u3001\u305d\u308c\u307b\u3069\u60aa\u5f71\u97ff\u3092\u53ca\u307c\u3057\u307e\u305b\u3093\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/jp\/learn\/speed-up-wordpress\/\">\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u30b9\u30af\u30ed\u30fc\u30eb\u305b\u305a\u306b\u898b\u3048\u308b\u90e8\u5206\u306e\u8aad\u307f\u8fbc\u307f\u6642\u9593\u3092\u77ed\u7e2e\u3059\u308b\u3053\u3068\u3067<\/a>\u3001Google\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u8a2a\u554f\u8005\u306b\u3088\u308a\u5feb\u9069\u3067\u3001\u3088\u308a\u901f\u3044\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2><a id=\"test\"><\/a>JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u65b9\u6cd5<\/h2>\n<p>WordPress\u30b5\u30a4\u30c8\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3002\u3053\u308c\u3092\u30c6\u30b9\u30c8\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/gtmetrix-speed-test\/\">GTmetrix<\/a>\u304c\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<p>GTmetrix\u3092\u4f7f\u3048\u3070\u7b49\u7d1a\u304c\u8868\u793a\u3055\u308c\u3001\u307e\u305f\u5ef6\u671f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u7279\u5b9a\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u30ea\u30b9\u30c8\u8868\u793a\u3067\u63d0\u6848\u3057\u3066\u3082\u3089\u3048\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1300px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/08\/defer-parsing-of-javascript-gtmetrix.jpg\" alt=\"GTmetrix\u3092\u4f7f\u3063\u3066JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\" width=\"1300\" height=\"731\"><figcaption class=\"wp-caption-text\">GTmetrix\u3092\u4f7f\u3063\u3066JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b<\/figcaption><\/figure>\n<h2><a id=\"methods\"><\/a>JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3055\u307e\u3056\u307e\u306a\u65b9\u6cd5<\/h2>\n<p>JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u8ffd\u52a0\u3067\u304d\u308b<a href=\"https:\/\/kinsta.com\/jp\/learn\/speed-up-wordpress\/#clear-js-from-the-critical-rendering-path\">2\u3064\u306e\u5c5e\u6027<\/a>\u304b\u3089\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>Async<\/li>\n<li>Defer<\/li>\n<\/ol>\n<p>\u4e21\u65b9\u306e\u5c5e\u6027\u3067\u3001\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306fHTML\u306e\u89e3\u6790\u3092\u4e00\u6642\u505c\u6b62\u3059\u308b\u3053\u3068\u306a\u304fJavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u9055\u3044\u3068\u3057\u3066\u3001 <strong>async<\/strong>\u306f\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u52d5\u4f5c\u306e\u3088\u3046\u306b\uff09HTML\u306e\u89e3\u6790\u3092\u4e00\u6642\u505c\u6b62\u305b\u305a\u306b\u3001HTML\u30d1\u30fc\u30b5\u30fc\u3092\u4e00\u6642\u505c\u6b62\u3057\u3066\u3001\u53d6\u5f97\u5f8c\u306b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p><strong>defer<\/strong>\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306fHTML\u306e\u89e3\u6790\u4e2d\u306b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u304c\u3001HTML\u89e3\u6790\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u89e3\u6790\u306f\u5f85\u6a5f\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/www.growingwiththeweb.com\/2014\/02\/async-vs-defer-attributes.html\">Growing with the Web\u306e\u8aac\u660e<\/a>\u306f\u3001\u3053\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3046\u3063\u3066\u3064\u3051\u3067\u3059\u3002<\/p>\n<figure style=\"width: 801px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/08\/defer-parsing-of-javascript-3.png\" alt=\"async\u3068defer\u306e\u9055\u3044\u306e\u8aac\u660e\" width=\"801\" height=\"814\"><figcaption class=\"wp-caption-text\">async\u3068defer\u306e\u9055\u3044\u306e\u8aac\u660e<\/figcaption><\/figure>\n<p>Varvy\u306ePatrick Sexton\u6c0f\u304c\u63a8\u5968\u3059\u308b\u5225\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u306f\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u6700\u521d\u306e\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u306b\u306e\u307f\u3001\u5916\u90e8JavaScript\u30d5\u30a1\u30a4\u30eb\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u3001\u6700\u521d\u306e\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067JavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u307e\u305f\u306f\u5b9f\u884c\u3057\u306a\u3044\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3054\u7d39\u4ecb\u3059\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001JavaScript\u3092\u30da\u30fc\u30b8\u306e\u4e00\u756a\u4e0b\u306b\u79fb\u52d5\u3059\u308b\u3053\u3068\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u65b9\u6cd5\u306f\u512a\u308c\u305f\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002\u3068\u3044\u3046\u306e\u3082\u3001\u30da\u30fc\u30b8\u304c\u3059\u3050\u306b\u8868\u793a\u3055\u308c\u3066\u3082\u3001\u3059\u3079\u3066\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067\u3001\u8a2a\u554f\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u306f\u8aad\u307f\u8fbc\u307f\u4e2d\u306e\u30da\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u305f\u3081\u3067\u3059\u3002\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u5b8c\u5168\u306b\u8aad\u307f\u8fbc\u307e\u308c\u3066\u3044\u306a\u3044\u3068\u611f\u3058\u3001\u4e00\u90e8\u306e\u8a2a\u554f\u8005\u306f\u30da\u30fc\u30b8\u3092\u64cd\u4f5c\u3067\u304d\u306a\u3044\u72b6\u614b\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2><a id=\"how\"><\/a>WordPress\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\uff084\u3064\u306e\u624b\u6cd5\uff09<\/h2>\n<p>WordPress\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u306b\u306f\u3001\u4e3b\u306b\u3001\u6b21\u306e3\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/#plugin\">\u30d7\u30e9\u30b0\u30a4\u30f3<\/a>\u00a0\u2013 JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u512a\u79c0\u306a\u7121\u6599WordPress\u30d7\u30e9\u30b0\u30a4\u30f3\u304c\u3042\u308a\u307e\u3059\u30022\u3064\u306e\u6709\u540d\u3069\u3053\u308d\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3092\u884c\u3046\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/li>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/#varvy\">Varvy\u30e1\u30bd\u30c3\u30c9<\/a>\u00a0\u2013 \u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306b\u8a73\u3057\u3044\u65b9\u3067\u3042\u308c\u3070\u3001\u76f4\u63a5\u30b5\u30a4\u30c8\u306e\u30b3\u30fc\u30c9\u3092\u7de8\u96c6\u3057\u3066\u3001Varvy\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/#functions\">php\u30d5\u30a1\u30a4\u30eb<\/a>\u00a0\u2013 \u5b50\u30c6\u30fc\u30de\u306efunctions.php\u30d5\u30a1\u30a4\u30eb\u306b\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092\u8ffd\u52a0\u3057\u3066\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u81ea\u52d5\u7684\u306b\u5ef6\u671f\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u4e0a\u306e\u9805\u76ee\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u5e0c\u671b\u306e\u65b9\u6cd5\u306b\u76f4\u63a5\u30b8\u30e3\u30f3\u30d7\u3059\u308b\u304b\u3001\u3059\u3079\u3066\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8aad\u3093\u3067\u3001\u6700\u9069\u306a\u65b9\u6cd5\u3092\u898b\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><a id=\"plugin\"><\/a>1. \u7121\u6599\u306e\u300cAsync JavaScript\u300d\u30d7\u30e9\u30b0\u30a4\u30f3<\/h3>\n<p><a href=\"https:\/\/wordpress.org\/plugins\/async-javascript\/\">Async JavaScript<\/a>\u306f\u3001\u540c\u3058\u304f\u4eba\u6c17\u306e<a href=\"https:\/\/wordpress.org\/plugins\/autoptimize\/\">Autoptimize\u30d7\u30e9\u30b0\u30a4\u30f3<\/a>\u306e\u958b\u767a\u8005\u3067\u3082\u3042\u308b\u3001Frank Goossens\u6c0f\u304c\u8a87\u308b\u7121\u6599\u306eWordPress\u30d7\u30e9\u30b0\u30a4\u30f3\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u4f7f\u3048\u3070\u3001\u975e\u540c\u671f\u307e\u305f\u306f\u9045\u5ef6\u3092\u4f7f\u7528\u3057\u3066JavaScript\u306e\u89e3\u6790\u3092\u7c21\u5358\u306b\u5ef6\u671f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5229\u7528\u3059\u308b\u306b\u306f\u3001WordPress.org\u306e\u7121\u6599\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u6709\u52b9\u5316\u3057\u307e\u3057\u3087\u3046\u3002\u300c\u8a2d\u5b9a\u300d\u2192\u300c<strong>Async JavaScript<\/strong>\u300d\u306b\u79fb\u52d5\u3057\u3066\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u90e8\u3067\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3057\u3001\u975e\u540c\u671f\u3068\u9045\u5ef6\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u70b9\u3092\u982d\u306e\u7247\u9685\u306b\u7f6e\u3044\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>\u975e\u540c\u671f\u306fHTML\u306e\u89e3\u6790\u4e2d\u306bJavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u5f8c\u3001HTML\u89e3\u6790\u3092\u4e00\u6642\u505c\u6b62\u3057\u3066JavaScript\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n<li>\u9045\u5ef6\u306f\u3001HTML\u306e\u89e3\u6790\u4e2d\u306bJavaScript\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001HTML\u89e3\u6790\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067\u5b9f\u884c\u3092\u5f85\u6a5f\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<figure style=\"width: 1983px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/08\/defer-parsing-of-javascript-1.png\" alt=\"Async JavaScript\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u4f7f\u3044\u65b9\" width=\"1983\" height=\"1226\"><figcaption class=\"wp-caption-text\">Async JavaScript\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u4f7f\u3044\u65b9<\/figcaption><\/figure>\n<p>\u3055\u3089\u306b\u3001jQuery\u306e\u51e6\u7406\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u591a\u304f\u306e\u30c6\u30fc\u30de\u3068\u30d7\u30e9\u30b0\u30a4\u30f3\u306fjQuery\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u305f\u3081\u3001jQuery\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30b5\u30a4\u30c8\u306e\u8ef8\u3068\u306a\u308b\u6a5f\u80fd\u306e\u4e00\u90e8\u304c\u7834\u640d\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u3082\u5b89\u5168\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u305d\u3082\u305d\u3082jQuery\u3092\u9664\u5916\u3059\u308b\u3053\u3068\u3067\u3059\u304c\u3001\u9045\u5ef6\u3092\u8a66\u3057\u3066\u307f\u308b\u4fa1\u5024\u3082\u3042\u308b\u3067\u3057\u3087\u3046\u3002\u500b\u5225\u306e\u30b5\u30a4\u30c8\u3067\u5fb9\u5e95\u7684\u306b\u30c6\u30b9\u30c8\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u307e\u305f\u3001\u7279\u5b9a\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u624b\u52d5\u3067\u9045\u5ef6\u5bfe\u8c61\u306b\u542b\u3093\u3060\u308a\u3001\u305d\u3053\u304b\u3089\u9664\u5916\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u3001\u30b5\u30a4\u30c8\u3067\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u7279\u5b9a\u306e\u30c6\u30fc\u30de\u3084\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u3067\u304d\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 2191px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/08\/defer-parsing-of-javascript-2.png\" alt=\"Async JavaScript\u306e\u5bfe\u8c61\/\u9664\u5916\u30eb\u30fc\u30eb\" width=\"2191\" height=\"1387\"><figcaption class=\"wp-caption-text\">Async JavaScript\u306e\u5bfe\u8c61\/\u9664\u5916\u30eb\u30fc\u30eb<\/figcaption><\/figure>\n<h3>2. WP Rocket\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u3046<\/h3>\n<p>Kinsta\u3067\u306f\u307b\u3068\u3093\u3069\u306e<a href=\"https:\/\/kinsta.com\/jp\/blog\/wordpress-caching-plugins\/\">\u30ad\u30e3\u30c3\u30b7\u30e5\u30d7\u30e9\u30b0\u30a4\u30f3<\/a>\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u305b\u3093\u304c\u3001 <a href=\"https:\/\/kinsta.com\/jp\/blog\/wordpress-cache\/\">Kinsta\u306e\u30b5\u30fc\u30d0\u30fc\u30ec\u30d9\u30eb\u3067\u306e\u30ad\u30e3\u30c3\u30b7\u30e5<\/a>\u3068\u8abf\u548c\u3057\u6a5f\u80fd\u3059\u308b\u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u308b<a href=\"https:\/\/kinsta.com\/jp\/blog\/wp-rocket\/\">WP Rocket\u30d7\u30e9\u30b0\u30a4\u30f3\u306f\u3053\u306e\u70b9\u3092\u30af\u30ea\u30a2<\/a>\u3057\u3066\u3044\u308b\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n<p>WP Rocket\u306f\u3001\u4ed6\u306e\u591a\u304f\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u5408\u308f\u305b\u3066\u3001WP Rocket\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u6700\u9069\u5316\u30bf\u30d6\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3068\u3044\u3046\u5927\u304d\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<strong>JavaScript<\/strong>\u30d5\u30a1\u30a4\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u3067<strong>JavaScript<\/strong>\u306e\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>Async JavaScript\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u540c\u69d8\u306b\u3001WP Rocket\u3067\u3082jQuery\u3092\u9664\u5916\u3057\u3066\u3001\u30b5\u30a4\u30c8\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u95a2\u3059\u308b\u554f\u984c\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p>\n<figure style=\"width: 2015px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/08\/defer-parsing-of-javascript-wp-rocket.png\" alt=\"WP Rocket\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\" width=\"2015\" height=\"1393\"><figcaption class=\"wp-caption-text\">WP Rocket\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5<\/figcaption><\/figure>\n<h3><a id=\"varvy\"><\/a>3. Varvy\u63a8\u5968\u306e\u30e1\u30bd\u30c3\u30c9\uff08\u30b3\u30fc\u30c9\uff09<\/h3>\n<p>\u5148\u307b\u3069\u3001Varvy\u306ePatrick Sexton\u6c0f\u304c\u3001\u30b5\u30a4\u30c8\u306e\u6700\u521d\u306e\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u304c\u5b8c\u4e86\u3059\u308b\u307e\u3067JavaScript\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3068\u5b9f\u884c\u306e\u4e21\u65b9\u3092\u5ef6\u671f\u3059\u308b\u305f\u3081\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u306e\u4f7f\u7528\u3092\u63a8\u5968\u3057\u3066\u3044\u308b\u3001\u3068\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001Varvy\u306e\u63d0\u4f9b\u3059\u308b\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092\u8abf\u6574\u3057\u3066\u304b\u3089\u3001\u30c6\u30fc\u30de\u5185\u3001&lt;\/body&gt;\u30bf\u30b0\u306e\u76f4\u524d\u306b\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/varvy.com\/pagespeed\/defer-loading-javascript.html\">Varvy\u63d0\u4f9b\u306e\u30b3\u30fc\u30c9<\/a>\u306f\u3053\u3061\u3089\u3002<\/p>\n<pre><code class=\"language-js\">&lt;script type=\"text\/javascript\"&gt;\nfunction downloadJSAtOnload() {\nvar element = document.createElement(\"script\");\nelement.src = \"defer.js\";\ndocument.body.appendChild(element);\n}\nif (window.addEventListener)\nwindow.addEventListener(\"load\", downloadJSAtOnload, false);\nelse if (window.attachEvent)\nwindow.attachEvent(\"onload\", downloadJSAtOnload);\nelse window.onload = downloadJSAtOnload;\n&lt;\/script&gt;<\/code><\/pre>\n<p>\u300cdefer.js\u300d\u3092\u3001\u5ef6\u671f\u3057\u305f\u3044JavaScript\u30d5\u30a1\u30a4\u30eb\u306e\u5b9f\u969b\u306e\u30d5\u30a1\u30a4\u30eb\u540d\/\u30d1\u30b9\u306b\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306b\u3001<a href=\"https:\/\/developer.wordpress.org\/reference\/functions\/wp_footer\/\">wp_footer\u30d5\u30c3\u30af<\/a>\u3092\u4f7f\u7528\u3057\u3001\u5b50\u30c6\u30fc\u30de\u306efunctions.php\u30d5\u30a1\u30a4\u30eb\u3092\u4ecb\u3057\u3066\u30b3\u30fc\u30c9\u3092\u633f\u5165\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u306f\u3001Varvy\u306e\u30b3\u30fc\u30c9\u3092\u6b21\u306e\u3088\u3046\u306b\u30e9\u30c3\u30d7\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-js\">\/**\nDefer parsing of JavaScript with code snippet from Varvy\n*\/\nadd_action( 'wp_footer', 'my_footer_scripts' );\nfunction my_footer_scripts(){\n?&gt;\nREPLACE_WITH_VARVY_SCRIPT\n&lt;?php\n}<\/code><\/pre>\n<h3><a id=\"functions\"><\/a>4. functions.php\u30d5\u30a1\u30a4\u30eb\u3067JavaScript\u3092\u5ef6\u671f<\/h3>\n<p>\u6700\u5f8c\u306b\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092functions.php\u30d5\u30a1\u30a4\u30eb\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u308f\u305a\u306b\u3001JavaScript\u30d5\u30a1\u30a4\u30eb\u306bdefer\u5c5e\u6027\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang-js prettyprint prettyprinted\"><code><span class=\"kwd\">function<\/span><span class=\"pln\"> defer_parsing_of_js<\/span><span class=\"pun\">(<\/span><span class=\"pln\"> $url <\/span><span class=\"pun\">)<\/span> <span class=\"pun\">{<\/span>\n \t \t <span class=\"kwd\">if<\/span> <span class=\"pun\">(<\/span><span class=\"pln\"> is_user_logged_in<\/span><span class=\"pun\">()<\/span> <span class=\"pun\">)<\/span> <span class=\"kwd\">return<\/span><span class=\"pln\"> $url<\/span><span class=\"pun\">;<\/span> <span class=\"com\">\/\/don't break WP Admin<\/span>\n \t \t <span class=\"kwd\">if<\/span> <span class=\"pun\">(<\/span><span class=\"pln\"> FALSE <\/span><span class=\"pun\">===<\/span><span class=\"pln\"> strpos<\/span><span class=\"pun\">(<\/span><span class=\"pln\"> $url<\/span><span class=\"pun\">,<\/span> <span class=\"str\">'.js'<\/span> <span class=\"pun\">)<\/span> <span class=\"pun\">)<\/span> <span class=\"kwd\">return<\/span><span class=\"pln\"> $url<\/span><span class=\"pun\">;<\/span>\n \t \t <span class=\"kwd\">if<\/span> <span class=\"pun\">(<\/span><span class=\"pln\"> strpos<\/span><span class=\"pun\">(<\/span><span class=\"pln\"> $url<\/span><span class=\"pun\">,<\/span> <span class=\"str\">'jquery.js'<\/span> <span class=\"pun\">)<\/span> <span class=\"pun\">)<\/span> <span class=\"kwd\">return<\/span><span class=\"pln\"> $url<\/span><span class=\"pun\">;<\/span>\n \t \t <span class=\"kwd\">return<\/span><span class=\"pln\"> str_replace<\/span><span class=\"pun\">(<\/span> <span class=\"str\">' src'<\/span><span class=\"pun\">,<\/span> <span class=\"str\">' defer src'<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> $url <\/span><span class=\"pun\">);<\/span><\/code><\/pre>\n<pre><code class=\"language-js\">function defer_parsing_of_js ( $url ) {\t \t<span class=\"pun\">}<\/span><span class=\"pln\">\n\t \tadd_filter<\/span><span class=\"pun\">(<\/span> <span class=\"str\">'script_loader_tag'<\/span><span class=\"pun\">,<\/span> <span class=\"str\">'defer_parsing_of_js'<\/span><span class=\"pun\">,<\/span> <span class=\"lit\">10<\/span> <span class=\"pun\">);<\/span><\/code><\/pre>\n<pre class=\"lang-js prettyprint prettyprinted\"><\/pre>\n<p>\u57fa\u672c\u7684\u306b\u3001\u3053\u306e\u30b9\u30cb\u30da\u30c3\u30c8\u306f\u3001jQuery\u3092\u9664\u304f\u3059\u3079\u3066\u306eJavaScript\u30d5\u30a1\u30a4\u30eb\u306bdefer\u5c5e\u6027\u3092\u8ffd\u52a0\u3059\u308b\u3088\u3046\u306bWordPress\u306b\u6307\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>\u8fc5\u901f\u304b\u3064\u7c21\u5358\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3059\u304c\u3001 Async JavaScript\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u3088\u3046\u306a\u304d\u3081\u7d30\u304b\u306a\u5236\u5fa1\u306f\u884c\u3048\u307e\u305b\u3093\u3002<\/p>\n\n<h2>\u307e\u3068\u3081<\/h2>\n<p>WordPress\u30b5\u30a4\u30c8\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u3053\u3068\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u3048\u308b\u4e0a\u3067\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u65b9\u6cd5\u306e\u3044\u305a\u308c\u304b\u3092\u4f7f\u7528\u3057\u3066WordPress\u306eJavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3057\u305f\u3089\u3001\u6b21\u306e2\u3064\u306e\u9805\u76ee\u3092\u884c\u3046\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30b5\u30a4\u30c8\u3092\u30c6\u30b9\u30c8\u3057\u3066\u3001\u7279\u5b9a\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5ef6\u671f\u3057\u3066\u3082\u30b9\u30af\u30ed\u30fc\u30eb\u305b\u305a\u306b\u898b\u3048\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u7834\u640d\u3057\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u7e70\u308a\u8fd4\u3057\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306fjQuery\u3067\u3088\u304f\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u591a\u304f\u306e\u30c4\u30fc\u30eb\u3067\u306fjQuery.js\u304c\u9664\u5916\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4ed6\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u3082\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>\u30b5\u30a4\u30c8\u3092GTmetrix\u3067\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001\u53ef\u80fd\u306a\u9650\u308a\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5ef6\u671f\u3067\u304d\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\uff08jQuery\u3092\u9664\u5916\u3059\u308b\u3068\u3001\u5b8c\u5168\u306a\u30b9\u30b3\u30a2\u3068\u306f\u306a\u3089\u306a\u3044\u50be\u5411\u306b\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u30b9\u30b3\u30a2\u306f\u5411\u4e0a\u3059\u308b\u306f\u305a\u3067\u3059\uff09\u3002<\/li>\n<\/ul>\n<p>WordPress\u3067JavaScript\u306e\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3054\u8cea\u554f\u304c\u3054\u3056\u3044\u307e\u3059\u304b\uff1f\u30b3\u30e1\u30f3\u30c8\u3067\u304a\u3057\u3089\u305b\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3067WordPress\u30b5\u30a4\u30c8 &#8230;<\/p>\n","protected":false},"author":38,"featured_media":24394,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[114,36],"topic":[778,837],"class_list":["post-24387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-pagespeed","tag-wordpress","topic-javascript-tutorials","topic-wordpress-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>WordPress\u3067Javascript\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\uff084\u3064\u306e\u89e3\u6c7a\u7b56\uff09<\/title>\n<meta name=\"description\" content=\"WordPress\u3067Javascript\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b4\u3064\u306e\u5bfe\u7b56\u3068\u305d\u306e\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WordPress\u3067Javascript\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b\u65b9\u6cd5\uff084\u3064\u306e\u89e3\u6c7a\u7b56\uff09\" \/>\n<meta property=\"og:description\" content=\"WordPress\u3067Javascript\u89e3\u6790\u3092\u5ef6\u671f\u3059\u308b4\u3064\u306e\u5bfe\u7b56\u3068\u305d\u306e\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kinsta.com\/jp\/blog\/defer-parsing-of-javascript\/\" \/>\n<meta property=\"og:site_name\" content=\"Kinsta\u00ae\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Kinsta-Japan-334616080691171\/\" \/>\n<meta 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