{"id":4818,"date":"2024-04-03T07:15:07","date_gmt":"2024-04-03T07:15:07","guid":{"rendered":"http:\/\/screamingfrog.club\/carga-perezosa-y-xpath\/"},"modified":"2024-07-08T07:42:04","modified_gmt":"2024-07-08T07:42:04","slug":"lazy-loading-y-xpath","status":"publish","type":"post","link":"https:\/\/screamingfrog.club\/es\/lazy-loading-y-xpath\/","title":{"rendered":"Lazy Loading y XPath"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1248px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-title-center fusion-title-text fusion-title-size-two\" style=\"--awb-text-color:#141617;--awb-margin-top:20px;--awb-margin-bottom:20px;--awb-sep-color:var(--awb-color6);--awb-font-size:40px;\"><div class=\"title-sep-container title-sep-container-left\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><span class=\"awb-title-spacer\"><\/span><h2 class=\"fusion-title-heading title-heading-center awb-gradient-text\" style=\"font-family:&quot;Work Sans&quot;;font-style:normal;font-weight:800;margin:0;letter-spacing:-0.012em;text-transform:var(--awb-typography1-text-transform);background-color:#f79501;background-image:linear-gradient(150deg, #f79501 20%,#fe6996 100%);font-size:1em;line-height:1em;\">An\u00e1lisis de \u00abLazy Loading\u00bb<\/h2><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-1\"><p>Esta visi\u00f3n comienza con un tweet de Jonattan Moore que comparte con la comunidad Seo c\u00f3mo escanear im\u00e1genes en Lazy Loading utilizando XPath de Screaming Frog.<\/p>\n<div class=\"wp-block-image\"><\/div>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"696\" height=\"495\" alt=\"Lazy loading analisi con screaming frog\" title=\"tweet-xpath-lazy-loading-696&#215;495\" src=\"http:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/tweet-xpath-lazy-loading-696x495-1.png\" class=\"img-responsive wp-image-2313 disable-lazyload\" srcset=\"https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/tweet-xpath-lazy-loading-696x495-1-200x142.png 200w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/tweet-xpath-lazy-loading-696x495-1-400x284.png 400w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/tweet-xpath-lazy-loading-696x495-1-600x427.png 600w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/tweet-xpath-lazy-loading-696x495-1.png 696w\" sizes=\"(max-width: 640px) 100vw, 696px\" \/><\/span><\/div><div class=\"fusion-title title fusion-title-2 fusion-title-center fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#141617;--awb-margin-top:20px;--awb-margin-bottom:20px;--awb-sep-color:var(--awb-color6);--awb-font-size:40px;\"><div class=\"title-sep-container title-sep-container-left\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><span class=\"awb-title-spacer\"><\/span><h3 class=\"fusion-title-heading title-heading-center awb-gradient-text\" style=\"font-family:&quot;Work Sans&quot;;font-style:normal;font-weight:800;margin:0;letter-spacing:-0.012em;text-transform:var(--awb-typography1-text-transform);background-color:#f79501;background-image:linear-gradient(150deg, #f79501 20%,#fe6996 100%);font-size:1em;line-height:1em;\">Lazy Loading de im\u00e1genes<\/h3><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-2\"><p>Empecemos por entender qu\u00e9 es la Carga Perezosa para poder apreciar plenamente el trabajo de Jonathan.<\/p>\n<p>\u00bfSabes cuando navegas por una p\u00e1gina web y, a medida que te desplazas hacia abajo, van apareciendo nuevas im\u00e1genes?<\/p>\n<p>Esta caracter\u00edstica se denomina \u00abCarga perezosa\u00bb y corresponde a una carga \u00abbajo demanda\u00bb que s\u00f3lo tiene lugar cuando lo solicita la navegaci\u00f3n del usuario y se utiliza para todos aquellos elementos que afectar\u00edan al rendimiento de la p\u00e1gina si se trataran en primera instancia con el resto de elementos en el hilo principal (tambi\u00e9n afectar\u00eda al Core Web Vitals).<\/p>\n<p>Dado que la velocidad de carga es uno de los pilares del posicionamiento en buscadores, esta estrategia que ofrece una mejor experiencia al usuario debe tenerse muy en cuenta.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-3 fusion-title-center fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#141617;--awb-margin-top:20px;--awb-margin-bottom:20px;--awb-sep-color:var(--awb-color6);--awb-font-size:40px;\"><div class=\"title-sep-container title-sep-container-left\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><span class=\"awb-title-spacer\"><\/span><h3 class=\"fusion-title-heading title-heading-center awb-gradient-text fusion-responsive-typography-calculated\" style=\"font-family:&quot;Work Sans&quot;;font-style:normal;font-weight:800;margin:0;letter-spacing:-0.012em;text-transform:var(--awb-typography1-text-transform);background-color:#f79501;background-image:linear-gradient(150deg, #f79501 20%,#fe6996 100%);font-size:1em;--fontSize:40;line-height:1;\">Lazy Loading y Google<\/h3><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-3\"><p>As\u00ed que, partiendo de las premisas, esta estrategia es recomendable para todos los sitios web con el fin de mejorar la experiencia de usuario de los navegantes, pero \u00bfqu\u00e9 opina el L\u00edder M\u00e1ximo Google de esta implementaci\u00f3n?<\/p>\n<p>Google est\u00e1 de acuerdo con esto, pero advierte que hay que tener mucho cuidado en la implementaci\u00f3n para no impedir que el bot rastree los recursos cargados mediante \u00abCarga Lenta\u00bb, de lo contrario podr\u00eda no indexarlos.<\/p>\n<p>En resumen, el motor de b\u00fasqueda aprueba esta t\u00e9cnica, pero pide asegurarse de que puede ver todos los recursos que se van a evaluar en la indexaci\u00f3n. Para entender mejor lo que pide Google, te invito a leer su gu\u00eda dedicada: <a href=\"https:\/\/developers.google.com\/search\/docs\/guides\/lazy-loading\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Aseg\u00farate de que Google puede ver el contenido cargado de forma perezosa<\/a>.<\/p>\n<p>Los aspectos que todo desarrollador debe tener en cuenta son esencialmente tres:<\/p>\n<ul>\n<li><strong>Carga el contenido cuando<\/strong> sea visible en la ventana gr\u00e1fica: para permitir que el robot de Google rastree completamente la p\u00e1gina, aseg\u00farate de que la carga diferida cargue todo el contenido siempre que sea visible en la ventana gr\u00e1fica mediante la API IntersectionObserver y un polyfill.<\/li>\n<li>En el caso de<strong>\u00abDesplazamiento infinito<\/strong>\u00ab, admite la carga \u00abPaginada\u00bb.<\/li>\n<li><strong>Prueba el correcto funcionamiento de Lazy Loading<\/strong>: puedes utilizar un script como Puppeteer, una librer\u00eda Node.js directamente local para verificar que las capturas de pantalla generadas por el script muestran todo el contenido de la p\u00e1gina.<\/li>\n<\/ul>\n<p>*fuente:https:\/\/blog.tagliaerbe.com\/lazy-loading\/<\/p>\n<\/div><div class=\"fusion-title title fusion-title-4 fusion-title-center fusion-title-text fusion-title-size-three\" style=\"--awb-text-color:#141617;--awb-margin-top:20px;--awb-margin-bottom:20px;--awb-sep-color:var(--awb-color6);--awb-font-size:40px;\"><div class=\"title-sep-container title-sep-container-left\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><span class=\"awb-title-spacer\"><\/span><h3 class=\"fusion-title-heading title-heading-center awb-gradient-text fusion-responsive-typography-calculated\" style=\"font-family:&quot;Work Sans&quot;;font-style:normal;font-weight:800;margin:0;letter-spacing:-0.012em;text-transform:var(--awb-typography1-text-transform);background-color:#f79501;background-image:linear-gradient(150deg, #f79501 20%,#fe6996 100%);font-size:1em;--fontSize:40;line-height:1;\">Auditor\u00eda de carga perezosa<\/h3><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:var(--awb-color6);\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-4\"><p>Una vez que hemos comprendido las l\u00edneas generales relativas a la Carga Lenta de im\u00e1genes, aprovechamos la funci\u00f3n de <strong>Extracci\u00f3n Personalizada<\/strong> de <a href=\"https:\/\/www.screamingfrog.club\/\">Screaming Frog<\/a> para hacer una auditor\u00eda del total de im\u00e1genes de una p\u00e1gina y de las que s\u00f3lo se cargan mediante carga bajo demanda.<\/p>\n<p>M\u00e1s informaci\u00f3n sobre la funci\u00f3n de Extracci\u00f3n Personalizada de Seo Spider aqu\u00ed.<\/p>\n<p>A continuaci\u00f3n se muestran las rutas XPath compartidas por Jonathan Moore para la Extracci\u00f3n Personalizada.<\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><a href=\"http:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1.png\" class=\"fusion-lightbox\" data-rel=\"iLightbox[12d5fa49e12f708e8e4]\" data-caption=\"fonte: Tweet Jonathan Moore\n\" data-title=\"custom-extraction-lazy-loading-immagini-1068&#215;374\" title=\"custom-extraction-lazy-loading-immagini-1068&#215;374\"><img decoding=\"async\" width=\"1068\" height=\"374\" src=\"http:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1.png\" alt class=\"img-responsive wp-image-2314\" srcset=\"https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1-200x70.png 200w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1-400x140.png 400w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1-600x210.png 600w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1-800x280.png 800w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-immagini-1068x374-1.png 1068w\" sizes=\"(max-width: 640px) 100vw, 1068px\" \/><\/a><\/span><\/div><div class=\"fusion-text fusion-text-5\" style=\"--awb-margin-top:10px;\"><p>Para facilitar su uso, las presento en forma de texto:<\/p>\n<pre class=\"wp-block-code\"><\/pre>\n<\/div><style type=\"text\/css\" scopped=\"scopped\">.fusion-syntax-highlighter-1 > .CodeMirror, .fusion-syntax-highlighter-1 > .CodeMirror .CodeMirror-gutters {background-color:var(--awb-color1);}.fusion-syntax-highlighter-1 > .CodeMirror .CodeMirror-gutters { background-color: var(--awb-color2); }.fusion-syntax-highlighter-1 > .CodeMirror .CodeMirror-linenumber { color: var(--awb-color8); }<\/style><div class=\"fusion-syntax-highlighter-container fusion-syntax-highlighter-1 fusion-syntax-highlighter-theme-light\" style=\"opacity:0;margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-size:14px;border-width:1px;border-style:solid;border-color:var(--awb-color3);\"><div class=\"syntax-highlighter-copy-code\"><span class=\"syntax-highlighter-copy-code-title\" data-id=\"fusion_syntax_highlighter_1\" style=\"font-size:14px;\">Copy to Clipboard<\/span><\/div><label for=\"fusion_syntax_highlighter_1\" class=\"screen-reader-text\">Syntax Highlighter<\/label><textarea class=\"fusion-syntax-highlighter-textarea\" id=\"fusion_syntax_highlighter_1\" data-readOnly=\"nocursor\" data-lineNumbers=\"1\" data-lineWrapping=\"\" data-theme=\"default\">1) All images\n-----------\ncount(\/\/img)\n\n-----------\n2) All lazy-loaded images\n-----------\ncount(\/\/img[contains(@loading,'lazy') or contains(@class,'lazy') or contains(@class,'lazyloaded')])\n\n-----------\n3) Images not lazy-loaded\n-----------\ncount(\/\/img[not(contains(@loading,'lazy') or contains(@class,'lazy') or contains(@class,'lazyloaded'))])\n\n-----------\n4) Loading lazy attribute\n-----------\ncount(\/\/*[contains(@loading, 'lazy')])\n\n-----------\n5) Lazy class\n-----------\ncount(\/\/*[contains(@class, 'lazy')])\n\n-----------\n6) Lazyloaded class\n-----------\ncount(\/\/*[contains(@class, 'lazyloaded')])\n\n-----------\n7) Data-lazy attribute\n-----------\ncount(\/\/@*[contains(name(),'data-lazy')])\n\n*fonte: https:\/\/gist.githubusercontent.com\/jonathanmooredigital\/667955e13965c1daa487796f76e11072\/raw\/fc078cd867256b7d18131b45dc415f1ff2231342\/screaming-frog-lazy-loading-custom-extraction-config.txt<\/textarea><\/div><div class=\"fusion-text fusion-text-6\" style=\"--awb-margin-top:10px;\"><p>Utilizando estos par\u00e1metros puedes obtener los siguientes resultados directamente en la pesta\u00f1a \u00abExtracci\u00f3n personalizada\u00bb de Screaming Frog, divididos por columnas y disponibles para tus an\u00e1lisis de optimizaci\u00f3n.<\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><a href=\"http:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1.png\" class=\"fusion-lightbox\" data-rel=\"iLightbox[32dddd510aa0dca73c1]\" data-caption=\"fonte: Tweet Jonathan Moore\n\" data-title=\"custom-extraction-lazy-loading-1068&#215;330\" title=\"custom-extraction-lazy-loading-1068&#215;330\"><img decoding=\"async\" width=\"1068\" height=\"330\" src=\"http:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1.png\" alt class=\"img-responsive wp-image-2315\" srcset=\"https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1-200x62.png 200w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1-400x124.png 400w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1-600x185.png 600w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1-800x247.png 800w, https:\/\/screamingfrog.club\/wp-content\/uploads\/2024\/04\/custom-extraction-lazy-loading-1068x330-1.png 1068w\" sizes=\"(max-width: 640px) 100vw, 1068px\" \/><\/a><\/span><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background hundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--link_color: #f79501;--awb-border-sizes-top:0;--awb-border-sizes-bottom:0;--awb-border-sizes-left:5;--awb-border-sizes-right:0;--awb-border-color:var(--awb-color6);--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-bottom:8px;--awb-margin-bottom:43px;--awb-background-color:var(--awb-color3);--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-7 fusion-text-no-margin\" style=\"--awb-margin-top:5px;--awb-margin-right:10px;--awb-margin-bottom:-10px;--awb-margin-left:10px;\"><p><strong>Pesta\u00f1a relacionada<\/strong>: <a href=\"https:\/\/screamingfrog.club\/es\/extraccion-personalizada\/\">Extracci\u00f3n personalizada<\/a> | <a href=\"https:\/\/screamingfrog.club\/es\/analisis-vitals-web\/\">Barra lateral<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[97],"tags":[],"class_list":["post-4818","post","type-post","status-publish","format-standard","hentry","category-guia-screaming-frog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lazy Loading y XPath | Screaming Frog<\/title>\n<meta name=\"description\" content=\"An\u00e1lisis de la lazy loading utilizando la funci\u00f3n XPath avanzada de Screaming Frog.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/screamingfrog.club\/es\/lazy-loading-y-xpath\/\" \/>\n<meta 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