{"id":881,"date":"2019-12-25T10:44:24","date_gmt":"2019-12-25T01:44:24","guid":{"rendered":"http:\/\/test.wordpress.symmetric.co.jp\/blog\/?p=881"},"modified":"2026-03-19T15:42:07","modified_gmt":"2026-03-19T06:42:07","slug":"lazy-load-javascript-library","status":"publish","type":"post","link":"https:\/\/technical-seo.jp\/lazy-load-javascript-library\/","title":{"rendered":"Lazy Load\u3067\u753b\u50cf\u3092\u9045\u5ef6\u30ed\u30fc\u30c9\u3059\u308b\u65b9\u6cd5\uff1a\u30da\u30fc\u30b8\u30b9\u30d4\u30fc\u30c9\u6539\u5584\u306e\u5b9f\u88c5\u30ac\u30a4\u30c9"},"content":{"rendered":"\n<p>\u5927\u91cf\u306e\u753b\u50cf\u3092\u542b\u3080Web\u30da\u30fc\u30b8\u306f\u3001\u8aad\u307f\u8fbc\u307f\u5b8c\u4e86\u307e\u3067\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u3001\u691c\u7d22\u30e6\u30fc\u30b6\u30fc\u306e\u5229\u4fbf\u6027\u3092\u640d\u306a\u3046\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002img\u30bf\u30b0\u3092\u901a\u5e38\u901a\u308a\u5b9f\u88c5\u3059\u308b\u3068\u3001\u753b\u9762\u5916\u306b\u3042\u308b\u753b\u50cf\u307e\u3067\u4e00\u6589\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u304c\u59cb\u307e\u308a\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u51e6\u7406\u80fd\u529b\u3092\u5360\u6709\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3092\u89e3\u6c7a\u3057\u3001\u30da\u30fc\u30b8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6700\u9069\u5316\u3059\u308b\u5b9f\u52d9\u7684\u306a\u624b\u6cd5\u304c\u3001\u753b\u50cf\u306e\u9045\u5ef6\u30ed\u30fc\u30c9\uff08Lazy Loading\uff09\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u6a19\u6e96\u6a5f\u80fd\u3068\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u7528\u3044\u305f\u5b9f\u88c5\u624b\u9806\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"p-blogParts post_content\" data-partsID=\"8565\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-columns\">\n<div class=\"wp-block-column\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.symmetric.co.jp\/seminar\/lp-seo-vol5-seminar\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1351\" height=\"397\" src=\"https:\/\/technical-seo.jp\/wp-content\/uploads\/2026\/03\/seo_seminar.png\" alt=\"\" class=\"wp-image-8566\" style=\"width:552px;height:auto\"\/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:33.33%\">\n<p><span class=\"swl-fz u-fz-s\">AI\u691c\u7d22\u6642\u4ee3\u306b\u3082\u901a\u7528\u3059\u308bSEO\u306e\u672c\u8cea\u3092\u5b66\u3076\u5165\u9580\u30bb\u30df\u30ca\u30fc\u3067\u3059\u3002\u691c\u7d22\u306e\u4ed5\u7d44\u307f\u3084\u610f\u56f3\u3092\u6574\u7406\u3057\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u6a29\u5a01\u6027\u3001\u30c6\u30af\u30cb\u30ab\u30ebSEO\u306e\u89b3\u70b9\u304b\u3089\u6539\u5584\u306e\u8003\u3048\u65b9\u3092\u89e3\u8aac\u3002SEO\u306e\u57fa\u672c\u3092\u5b66\u3073\u305f\u3044\u65b9\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/span><strong>\u3010\u53c2\u52a0\u8cbb\uff1a\u7121\u6599\u3011<\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<\/div>\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u9045\u5ef6\u30ed\u30fc\u30c9\u3068\u306f\uff1f<\/strong><\/h2>\n\n\n\n<p>\u753b\u50cf\u306e\u9045\u5ef6\u30ed\u30fc\u30c9\u3068\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u8868\u793a\u9818\u57df\uff08\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\uff09\u5185\u306b\u3042\u308b\u753b\u50cf\u306e\u307f\u3092\u512a\u5148\u7684\u306b\u8aad\u307f\u8fbc\u307f\u3001\u753b\u9762\u5916\u306b\u3042\u308b\u753b\u50cf\u306f\u30e6\u30fc\u30b6\u30fc\u304c\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u8fd1\u3065\u3044\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u8aad\u307f\u8fbc\u307f\u3092\u958b\u59cb\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30d6\u30e9\u30a6\u30b6\u306e\u6a19\u6e96\u52d5\u4f5c\u3067\u306f\u3001HTML\u306b\u542b\u307e\u308c\u308b\u3059\u3079\u3066\u306e\u753b\u50cf\u3092\u4e00\u5ea6\u306b\u8aad\u307f\u8fbc\u3082\u3046\u3068\u3057\u307e\u3059\u3002\u9045\u5ef6\u30ed\u30fc\u30c9\u3092\u5c0e\u5165\u3059\u308b\u3068\u3001\u521d\u671f\u8868\u793a\u306b\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u8ee2\u9001\u91cf\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u308b\u305f\u3081\u3001Google\u306e\u8a55\u4fa1\u6307\u6a19\u3067\u3042\u308bLCP\uff08\u6700\u5927\u8996\u899a\u8981\u7d20\u306e\u8868\u793a\u6642\u9593\uff09\u306e\u6539\u5584\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Loading\u5c5e\u6027\u306b\u3088\u308b\u6a19\u6e96\u5b9f\u88c5<\/strong><\/h2>\n\n\n\n<p>\u73fe\u5728\u3001\u4e3b\u8981\u306a\u30d6\u30e9\u30a6\u30b6\u306fHTML\u5c5e\u6027\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u9045\u5ef6\u30ed\u30fc\u30c9\u304c\u53ef\u80fd\u3067\u3059\u3002\u7279\u5225\u306a\u7406\u7531\u304c\u306a\u3044\u9650\u308a\u3001\u307e\u305a\u306f\u3053\u306e\u300c\u6a19\u6e96\u6a5f\u80fd\u300d\u3092\u512a\u5148\u3057\u3066\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u8a18\u8ff0\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\uff1cimg src=\"sample.jpg\" loading=\"lazy\" width=\"800\" height=\"600\" alt=\"\u753b\u50cf\u306e\u8aac\u660e\"\uff1e<\/code><\/pre>\n\n\n\n<ul>\n<li>loading=&#8221;lazy&#8221;\uff1a\u3053\u308c\u3060\u3051\u3067\u30d6\u30e9\u30a6\u30b6\u304c\u81ea\u52d5\u7684\u306b\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>width\u3068height\uff1a\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u3092\u660e\u793a\u3059\u308b\u3053\u3068\u3067\u3001\u8aad\u307f\u8fbc\u307f\u6642\u306e\u30ac\u30af\u3064\u304d\uff08CLS\uff1a\u30ec\u30a4\u30a2\u30a6\u30c8\u30b7\u30d5\u30c8\uff09\u3092\u9632\u304e\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e00\u65b9\u3001JavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\uff08Vanilla JS\u7248 Lazy Load\u306a\u3069\uff09\u306f\u3001\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u308b\u969b\u306e\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\u52b9\u679c\u3084\u3001\u8aad\u307f\u8fbc\u307f\u3092\u958b\u59cb\u3059\u308b\u8ddd\u96e2\u3092\u53b3\u5bc6\u306b\u6307\u5b9a\u3057\u305f\u3044\u5236\u4f5c\u73fe\u5834\u3067\u9078\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u30e9\u30a4\u30d6\u30e9\u30ea\u3067Lazy Load\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/strong><\/h2>\n\n\n\n<p>\u3088\u308a\u9ad8\u5ea6\u306a\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u65b9\u5411\u3051\u306b\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5c0e\u5165\u3059\u308b\u5177\u4f53\u7684\u306a\u624b\u9806\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30b9\u30c6\u30c3\u30d71\uff1ascript\u30bf\u30b0\u3092\u914d\u7f6e\u3059\u308b<\/strong><\/h3>\n\n\n\n<p>\u30e9\u30a4\u30d6\u30e9\u30ea\u672c\u4f53\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002CDN\uff08Content Delivery Network\uff09\u3092\u5229\u7528\u3059\u308b\u65b9\u6cd5\u304c\u52b9\u7387\u7684\u3067\u3059\u3002HTML\u306ebody\u30bf\u30b0\u3092\u9589\u3058\u308b\u76f4\u524d\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script src=\"https:\/\/cdn.jsdelivr.net\/npm\/lazyload@2.0.0-rc.2\/lazyload.min.js\"&gt;&lt;\/script&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30b9\u30c6\u30c3\u30d72\uff1aimg\u30bf\u30b0\u3092\u8a18\u8ff0\u3059\u308b<\/strong><\/h3>\n\n\n\n<p>\u6b21\u306b\u3001img\u30bf\u30b0\u306e\u8a18\u8ff0\u3092\u30e9\u30a4\u30d6\u30e9\u30ea\u5c02\u7528\u306e\u5f62\u5f0f\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002\u5b9f\u52d9\u4e0a\u3001\u4ee5\u4e0b\u306e3\u70b9\u304c\u5fc5\u9808\u3067\u3059\u3002<\/p>\n\n\n\n<ul>\n<li>class\u306b\u300clazyload\u300d\u3092\u8ffd\u52a0\u3059\u308b<\/li>\n\n\n\n<li>src\u5c5e\u6027\u3067\u306f\u306a\u304f\u3001data-src\u5c5e\u6027\u306b\u672c\u6765\u306e\u753b\u50cf\u30d1\u30b9\u3092\u8a18\u8ff0\u3059\u308b<\/li>\n\n\n\n<li>width\u5c5e\u6027\u3068height\u5c5e\u6027\u3092\u5fc5\u305a\u6307\u5b9a\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u8a18\u8ff0\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\uff1cimg class=\"lazyload\" width=\"800\" height=\"600\" data-src=\"img\/sample.jpg\" alt=\"\u753b\u50cf\u306e\u8aac\u660e\"\uff1e<\/code><\/pre>\n\n\n\n<p>\u5b9f\u969b\u306bimg\u30bf\u30b0\u306blazyload\u3092\u4ed8\u4e0e\u3055\u305b\u3066\u304b\u3089\u306e\u6ce8\u610f\u70b9\u306a\u3069\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u3061\u3089\u3092\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal\" data-type=\"type2\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/technical-seo.jp\/wp-content\/uploads\/2026\/02\/124.png\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/technical-seo.jp\/img-loading-lazy-best-practices\/\">img\u30bf\u30b0\u306bloading=\u201dlazy\u201d\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">2026\u5e74\u73fe\u5728\u3001\u591a\u304f\u306e\u30d6\u30e9\u30a6\u30b6\u3084WordPress\u306a\u3069\u306eCMS\u304c\u3001\u6a19\u6e96\u3067\u753b\u50cf\u306e\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u5225\u306aJavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5c0e\u5165\u3057\u306a\u304f\u3066\u3082\u3001img\u30bf\u30b0\u306b\u5c5e\u6027\u30921&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>\u30b9\u30c6\u30c3\u30d73\uff1a\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057<\/strong><\/h3>\n\n\n\n<p>HTML\u306e\u672b\u5c3e\u306b\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u8d77\u52d5\u3055\u305b\u308b\u305f\u3081\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u8ffd\u8a18\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script&gt; lazyload(); &lt;\/script&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u52d5\u4f5c\u78ba\u8a8d\u65b9\u6cd5<\/strong><\/h2>\n\n\n\n<p>\u6b63\u3057\u304f\u5b9f\u88c5\u3067\u304d\u3066\u3044\u308b\u304b\u3001\u4ee5\u4e0b\u306e2\u3064\u306e\u65b9\u6cd5\u3067\u691c\u8a3c\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1\uff1a\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067\u306e\u691c\u8a3c<\/strong><\/h3>\n\n\n\n<p>\u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u901a\u4fe1\u72b6\u6cc1\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol>\n<li>\u691c\u8a3c\u3057\u305f\u3044\u30da\u30fc\u30b8\u3067F12\u30ad\u30fc\u3092\u62bc\u3057\u3001\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u958b\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>Network\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09\u30bf\u30d6\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u30d5\u30a3\u30eb\u30bf\u30fc\u304b\u3089Img\uff08\u753b\u50cf\uff09\u3092\u9078\u629e\u3057\u307e\u3059\u3002<br>\u203b\u3053\u3053\u3067\u4e00\u65e6\u30da\u30fc\u30b8\u3092\u30ea\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30da\u30fc\u30b8\u3092\u66f4\u65b0\u3057\u3001\u521d\u671f\u72b6\u614b\u3067\u753b\u9762\u5916\u306e\u753b\u50cf\u304c\u8aad\u307f\u8fbc\u307e\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2048\" height=\"954\" src=\"https:\/\/technical-seo.jp\/wp-content\/uploads\/2026\/02\/image-76.png\" alt=\"\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u958b\u304d\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u753b\u50cf\u3092\u9078\u629e\u3057\u3066\u3001\u9045\u5ef6\u30ed\u30fc\u30c9\u3092\u78ba\u8a8d\u3059\u308b\" class=\"wp-image-8092\"\/><\/figure>\n\n\n\n<ol start=\"4\">\n<li>\u3086\u3063\u304f\u308a\u30b9\u30af\u30ed\u30fc\u30eb\u3092\u884c\u3044\u3001\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u308b\u76f4\u524d\u306b\u65b0\u3057\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u8ffd\u52a0\u3055\u308c\u308c\u3070\u6210\u529f\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2048\" height=\"955\" src=\"https:\/\/technical-seo.jp\/wp-content\/uploads\/2026\/02\/image-75.png\" alt=\"\u753b\u50cf\u304c\u9806\u756a\u306b\u8aad\u307f\u8fbc\u307e\u308c\u3066\u3044\u308b\u306e\u3092\u78ba\u8a8d\u3059\u308b\" class=\"wp-image-8091\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2\uff1aPageSpeed Insights\u3067\u306e\u78ba\u8a8d<\/strong><\/h3>\n\n\n\n<p>Google\u304c\u63d0\u4f9b\u3059\u308bPageSpeed Insights\u3092\u4f7f\u7528\u3057\u3066\u3001SEO\u89b3\u70b9\u3067\u306e\u8a55\u4fa1\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol>\n<li>PageSpeed Insights\u306bURL\u3092\u5165\u529b\u3057\u3001\u5206\u6790\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u8a3a\u65ad\u7d50\u679c\u306e\u4e2d\u306b\u3042\u308b\u300c\u6539\u5584\u3067\u304d\u308b\u9805\u76ee\u300d\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n<li>\u300c\u30aa\u30d5\u30b9\u30af\u30ea\u30fc\u30f3\u753b\u50cf\u306e\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u300d\u3068\u3044\u3046\u9805\u76ee\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u9045\u5ef6\u30ed\u30fc\u30c9\u304c\u9069\u5207\u306b\u6a5f\u80fd\u3057\u3066\u3044\u308b\u3068\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8a73\u3057\u3044\u78ba\u8a8d\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<ul>\n<li>\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/technical-seo.jp\/what-is-lcp\/\">\u30b5\u30fc\u30c1\u30b3\u30f3\u30bd\u30fc\u30eb\u306eLCP\u306e\u554f\u984c\u306e\u78ba\u8a8d\u30fb\u6539\u5584\u65b9\u6cd5<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Lazy Load\u5c0e\u5165\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30c8\u30e9\u30d6\u30eb\u89e3\u6c7a<\/strong><\/h2>\n\n\n\n<p>\u5b9f\u52d9\u3067\u767a\u751f\u3057\u3084\u3059\u3044\u30df\u30b9\u3068\u89e3\u6c7a\u7b56\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u306b\u306f\u9069\u7528\u3057\u306a\u3044<\/h3>\n\n\n\n<p>\u753b\u9762\u3092\u958b\u3044\u3066\u3059\u3050\u306b\u898b\u3048\u308b\u753b\u50cf\u306b\u9045\u5ef6\u30ed\u30fc\u30c9\u3092\u9069\u7528\u3059\u308b\u3068\u3001\u9006\u306b\u8868\u793a\u304c\u9045\u304f\u306a\u308aLCP\u304c\u60aa\u5316\u3057\u307e\u3059\u3002\u6700\u521d\u306e\u30e1\u30a4\u30f3\u30d3\u30b8\u30e5\u30a2\u30eb\u306a\u3069\u306f\u901a\u5e38\u901a\u308asrc\u5c5e\u6027\u3067\u8aad\u307f\u8fbc\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u753b\u50cf\u304c\u8aad\u307f\u8fbc\u307e\u308c\u306a\u3044<\/h3>\n\n\n\n<p>lazyload()\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u304c\u8a18\u8ff0\u3055\u308c\u3066\u3044\u306a\u3044\u3001\u3042\u308b\u3044\u306f\u8a18\u8ff0\u5834\u6240\u304c\u753b\u50cf\u30bf\u30b0\u3088\u308a\u4e0a\u306b\u3042\u308b\u3068\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3002\u5b9f\u884c\u30b3\u30fc\u30c9\u306f\u5fc5\u305aHTML\u306e\u672b\u5c3e\u306b\u914d\u7f6e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3059\u3050\u306b\u8aad\u307f\u8fbc\u307e\u308c\u3066\u3057\u307e\u3046<\/h3>\n\n\n\n<p>data-src\u5c5e\u6027\u3067\u306f\u306a\u304f\u3001src\u5c5e\u6027\u306b\u753b\u50cf\u30d1\u30b9\u3092\u8a18\u8ff0\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u30d1\u30b9\u306e\u8a18\u8ff0\u5834\u6240\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<div class=\"p-blogParts post_content\" data-partsID=\"8565\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-columns\">\n<div class=\"wp-block-column\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.symmetric.co.jp\/seminar\/lp-seo-vol5-seminar\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1351\" height=\"397\" src=\"https:\/\/technical-seo.jp\/wp-content\/uploads\/2026\/03\/seo_seminar.png\" alt=\"\" class=\"wp-image-8566\" style=\"width:552px;height:auto\"\/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:33.33%\">\n<p><span class=\"swl-fz u-fz-s\">AI\u691c\u7d22\u6642\u4ee3\u306b\u3082\u901a\u7528\u3059\u308bSEO\u306e\u672c\u8cea\u3092\u5b66\u3076\u5165\u9580\u30bb\u30df\u30ca\u30fc\u3067\u3059\u3002\u691c\u7d22\u306e\u4ed5\u7d44\u307f\u3084\u610f\u56f3\u3092\u6574\u7406\u3057\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u6a29\u5a01\u6027\u3001\u30c6\u30af\u30cb\u30ab\u30ebSEO\u306e\u89b3\u70b9\u304b\u3089\u6539\u5584\u306e\u8003\u3048\u65b9\u3092\u89e3\u8aac\u3002SEO\u306e\u57fa\u672c\u3092\u5b66\u3073\u305f\u3044\u65b9\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/span><strong>\u3010\u53c2\u52a0\u8cbb\uff1a\u7121\u6599\u3011<\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>\u307e\u3068\u3081<\/strong><\/h2>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u9045\u5ef6\u30ed\u30fc\u30c9\u306e\u57fa\u672c\u304b\u3089\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5b9f\u88c5\u65b9\u6cd5\u307e\u3067\u3092\u89e3\u8aac\u3057\u307e\u3057\u305f\u30022026\u5e74\u6642\u70b9\u3067\u3082\u3001\u30da\u30fc\u30b8\u306e\u8868\u793a\u901f\u5ea6\u306f\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3068\u30af\u30ed\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u4e21\u9762\u3067\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305a\u306f\u6a19\u6e96\u306eloading=&#8221;lazy&#8221;\u304b\u3089\u691c\u8a0e\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u30b9\u30c8\u30ec\u30b9\u306e\u306a\u3044\u9ad8\u901f\u306a\u30b5\u30a4\u30c8\u3092\u69cb\u7bc9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<!--\n<aside id=\"seminar\">\n\t<header>\u3010\u7121\u6599\u30aa\u30f3\u30e9\u30a4\u30f3\u30bb\u30df\u30ca\u30fc\u3011<br>\u306f\u3058\u3081\u3066\u306e\u30c6\u30af\u30cb\u30ab\u30ebSEO<\/header>\n\t<div class=\"detail\">\n\t\t<p class=\"awasete__title\">\u7406\u89e3\u3067\u304d\u308bSEO\u5bfe\u7b56\u3092\u5b66\u3076<\/p>\n\t\t<div class=\"detail_wrapper columns\">\n\t\t\t<div class=\"column\">\n\t\t\t\t<p>\u300cEAT\u300d\u3092\u9ad8\u3081\u308b\u3001\u54c1\u8cea\u306e\u9ad8\u3044\u8a18\u4e8b\u3092\u66f8\u304f\u306a\u3069\u306e\u62bd\u8c61\u7684\u306a\u5bfe\u7b56\u3067\u306f\u306a\u304f\u3001\u5bfe\u7b56\u304c\u660e\u78ba\u304b\u3064\u5177\u4f53\u7684\u306a\u300c\u30c6\u30af\u30cb\u30ab\u30ebSEO\u300d\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3059\uff01<\/p>\n\t\t\t\t<p>SEO\u5bfe\u7b56\u306b\u306f\u3082\u3084\u3082\u3084\u3057\u305f\u8a71\u304c\u591a\u3044\u3068\u611f\u3058\u3089\u308c\u3066\u3044\u308b\u65b9\u3001\u662f\u975e\u3054\u53c2\u52a0\u304f\u3060\u3055\u3044\uff01<\/p>\n\t\t\t<\/div>\n\t\t\t<div class=\"seminar_img_wrapper column\">\n\t\t\t\t<img decoding=\"async\" src=\"\/blog\/wp-content\/uploads\/2020\/07\/webinar_seo.png\" alt=\"\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u306e\u30d7\u30ed\u30bb\u30b9\">\n\t\t\t<\/div>\n\t\t<\/div>\n\t\n\t\t<p><a href=\"https:\/\/siteanatomy.com\/seminar\/\" target=\"_blank\" data-comment=\"\u30bb\u30df\u30ca\u30fc\u30ea\u30f3\u30af_\u4e2d\u592e\">SEO\u30bb\u30df\u30ca\u30fc\u8a73\u7d30<\/a><\/p>\n\t\t<p class=\"awasete__title\">\u53c2\u52a0\u8005\u306e\u58f0<\/p>\n\t\t\n\t\t<div class=\"voice_wrapper\">\n\t\t\t<img decoding=\"async\" src=\"\/blog\/wp-content\/uploads\/2020\/07\/semiar_people.png\" alt=\"\u53c2\u52a0\u8005\u306e\u58f0\">\n\t\t\t<p>SEO\u306b\u3064\u3044\u3066\u3053\u308c\u307e\u3067\u5206\u304b\u3063\u305f\u6c17\u3067\u3044\u307e\u3057\u305f\u304c\u3001\u4eca\u56de\u306e\u30bb\u30df\u30ca\u30fc\u3067\u77e5\u8b58\u306e\u6574\u7406\u304c\u3067\u304d\u3001\u7406\u89e3\u3092\u6df1\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\t\t<\/div>\n\t\t<div class=\"voice_wrapper\" style=\"padding-bottom: 1rem;\">\n\t\t\t<img decoding=\"async\" src=\"\/blog\/wp-content\/uploads\/2020\/07\/semiar_people.png\" alt=\"\u53c2\u52a0\u8005\u306e\u58f0\">\n\t\t\t<p>\u57fa\u790e\u304b\u3089\u4e01\u5be7\u306b\u6559\u3048\u3066\u3044\u305f\u3060\u304d\u3001\u3068\u3066\u3082\u5206\u304b\u308a\u3084\u3059\u304b\u3063\u305f\u3067\u3059\u3002<\/p>\n\t\t<\/div>\n\t\t<div class=\"voice_wrapper\">\n\t\t\t<img decoding=\"async\" src=\"\/blog\/wp-content\/uploads\/2020\/07\/semiar_people.png\" alt=\"\u53c2\u52a0\u8005\u306e\u58f0\">\n\t\t\t<p>SEO\u6539\u5584\u306e\u30d9\u30fc\u30b7\u30c3\u30af\u306a\u624b\u6cd5\u304c\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3055\u308c\u3066\u3088\u304b\u3063\u305f<\/p>\n\t\t<\/div>\n\n\t<\/div>\n<\/aside>\n\n<style>\n        #seminar > .detail p.awasete__title{\n\t\ttext-align: center;\n\t}\n    \n       #seminar > .detail .detail_wrapper div.seminar_img_wrapper{\n\t        flex-basis: 40%;\n    \t        padding: 1rem;\n\t}\n\t #seminar > .detail .detail_wrapper div{\n\t\tflex-basis: 60%;\n\t}\n\t #seminar > .detail .voice_wrapper{\n\t\tdisplay: flex;\n\t\talign-items: center;\n\t}\n\t #seminar > .detail .voice_wrapper img{\n\t\twidth: 50px;\n\t\tmargin-right: 1rem;\n\t}\n\n\t@media screen and (min-width: 769px){\n\t\t#seminar > .detail .detail_wrapper{\n\t\t\tdisplay: flex;\n                        align-items: center;\n\t\t}\n\t}\n<\/style>\n-->\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal -noimg\" data-type=\"type2\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u8868\u793a\u901f\u5ea6\u3068SEO\u306e\u95a2\u4fc2\u3092\u77e5\u308b<\/span>\n\t\t\t\t\t\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/technical-seo.jp\/pagespeed-insights-score\/\">PageSpeed Insights\u306e\u30b9\u30b3\u30a2\u3092\u4f38\u3070\u3059\u3001\u8868\u793a\u901f\u5ea6\u306e\u6539\u5584\u6cd5<\/a>\n\t\t\t\t\t\t<span class=\"p-blogCard__excerpt\">Web\u30b5\u30a4\u30c8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6539\u5584\u3057\u305f\u3044\u3051\u308c\u3069\u3001\u3069\u3053\u304b\u3089\u624b\u3092\u3064\u3051\u308c\u3070\u3044\u3044\u304b\u5206\u304b\u3089\u306a\u3044\u3002\u305d\u3093\u306a\u65b9\u306e\u305f\u3081\u306b\u3001\u6539\u5584\u30dd\u30a4\u30f3\u30c8\u3092\u53b3\u9078\u3057\u3066\u307e\u3068\u3081\u307e\u3057\u305f\u3002 \u672c\u8a18\u4e8b\u3067\u306f\u3001\u7279\u5225\u306a\u77e5\u8b58\u304c&#8230;<\/span>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -internal -noimg\" data-type=\"type2\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">JSON\u3067SEO\u5bfe\u7b56\u3059\u308b<\/span>\n\t\t\t\t\t\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" 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