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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

72

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/o/ub-theme/css/main.css?browserId=chrome&themeId=ub_WAR_...3600.0 s117.1 KiB
web.ub.edu/image/company_logo?img_id=45626902&t=17764105476673600.0 s97.5 KiB
/o/ub-theme/css/clay.css?browserId=chrome&themeId=ub_WAR_...3600.0 s69.7 KiB
web.ub.edu/o/ub-theme/fonts/roboto/roboto_medium/Roboto-Medium.woff23600.0 s49.1 KiB
web.ub.edu/o/ub-theme/fonts/roboto/roboto_bold/Roboto-Bold.woff23600.0 s48.8 KiB
web.ub.edu/o/ub-theme/fonts/roboto/roboto_regular/Roboto-Regular.woff23600.0 s48.1 KiB
consent.cookiebot.com/uc.js222.0 s35.7 KiB
static.hotjar.com/c/hotjar-1859237.js?sv=760.0 s6.2 KiB
cse.google.com/cse.js?cx=fdf6bc2e2504c890e0.0 ms4.1 KiB
/consentconfig/88355e31-7fef-4d33-b6e9-f715351dd339/web.u...71356.0 s1.5 KiB
web.ub.edu/o/ub-theme/images/ico/icon-close.svg3600.0 s580 B
web.ub.edu/o/ub-theme/images/ico/icon-close-black.svg3600.0 s580 B
web.ub.edu/o/frontend-js-web/liferay/modal/Modal.css3600.0 s407 B
web.ub.edu/o/ub-theme/images/ico/Search.svg3600.0 s306 B
/o/frontend-js-aui-web/alloy_ui.css?&mac=favIEq7hPo8AEd6k...3600.0 s184 B
web.ub.edu/o/frontend-js-web/css/notification.css3600.0 s166 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.17539] map[node:map[boundingRect:map[bottom:1490 height:799 left:0 right:1350 top:691 width:1350] lhId:page-13-DIV nodeLabel:Actualitat Tota l'actualitat INSTITUCIONAL 21-04-2026 La UB presenta al CRAI… path:1,HTML,1,BODY,0,DIV,6,DIV,0,DIV,1,SECTION,1,DIV,1,DIV,0,DIV,2,DIV selector:div#main-content > div.portlet-layout > div.row > div#column-top snippet:<div class="col-lg-12 portlet-column portlet-column-top px-0" id="column-top"> type:node] score:0.103721 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:813 height:17 left:405 right:415 top:796 width:10] lhId:page-18-SPAN nodeLabel:div.journal-content-article > h2.d-flex > a.d-inline-flex > span.arrow-right path:1,HTML,1,BODY,0,DIV,6,DIV,0,DIV,1,SECTION,1,DIV,1,DIV,0,DIV,2,DIV,0,DIV,0,DIV,1,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,2,H2,1,A,1,SPAN selector:div.journal-content-article > h2.d-flex > a.d-inline-flex > span.arrow-right snippet:<span class="arrow-right" role="presentation"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:134 height:134 left:306 right:1335 top:0 width:1029] lhId:page-11-DIV nodeLabel:UB.EDU Directori PTGAS i PDI Estudiants CA La UB Aprèn Investiga Transferència… path:1,HTML,1,BODY,0,DIV,6,DIV,0,DIV,0,HEADER,0,DIV,2,DIV selector:div#wrapper > header#banner > div.container-xl > div#respon-navs snippet:<div id="respon-navs" class="navigations ml-xl-auto " style="top: 136px;"> type:node] score:0.070282 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://web.ub.edu/o/ub-theme/fonts/roboto/roboto_regular/Roboto-Regular.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:50 height:50 left:833 right:1272 top:0 width:439] lhId:page-10-SECTION nodeLabel:UB.EDU Directori PTGAS i PDI Estudiants path:1,HTML,1,BODY,0,DIV,6,DIV,0,DIV,0,HEADER,0,DIV,2,DIV,0,DIV,0,DIV,1,SECTION selector:div#respon-navs > div.navigation-top > div#p_p_id_com_liferay_journal_content_web_portlet_JournalContentPortlet_INSTANCE_menusuperior_ > section#portlet_com_liferay_journal_content_web_portlet_JournalContentPortlet_INSTANCE_menusuperior snippet:<section class="portlet" id="portlet_com_liferay_journal_content_web_portlet_JournalContentPortlet_INST…"> type:node] score:0.001387]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:51.818 source:map[type:text value:[unattributed]]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/2688302/jornades-torres-home.jpg/b7fb5...352.0 KiB304.5 KiB
div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/2688302/Edifici-Historic-UB_targetes.j...246.5 KiB199.0 KiB
Un atles, un catàleg jesuïta i un sermó, protagonistes de la nova campanya Apad… div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/6785461/AF_APADRINA26_CanalsUB_ONLINE_...228.5 KiB181.1 KiB
La UB presenta al CRAI de Belles Arts el cartell de Sant Jordi 2026, signat per… div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/6785461/cartell_SJ26_destacadafora.jpg...209.9 KiB162.4 KiB
Inauguració del Jardí Geològic de la Zona Universitària div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/6785461/Jardíndp.jpg/8434d795-46cf-f9...206.1 KiB158.6 KiB
La missió arqueològica de la UB a Oxirrinc troba la ‘Ilíada’ d’Homer en una mòm… div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/6785461/egipte042026G.jpg/d15f98fb-16e...186.5 KiB139.1 KiB
Exposició. div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/2688302/Expo+web+arquitecturahome.jpg/...112.6 KiB103.4 KiB
div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img div.journal-content-article > div.ub-modal-gallery > div.ub-modal-item > img
/documents/2685349/6785461/novetats-edicionsUB-2026_a.jpg...131.1 KiB83.6 KiB
Ves a Universitat de Barcelona div#heading > div.site-title > a.logo > img
web.ub.edu/image/company_logo?img_id=45626902&t=177641054766797.4 KiB21.9 KiB

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...107.7 KiB120 ms
web.ub.edu/o/ub-theme/js/glider/glider.min.js3.0 KiB
cse.google.com/cse.js?cx=fdf6bc2e2504c890e4.1 KiB286 ms
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...381 B
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...77.1 KiB80 ms
/o/frontend-js-loader-modules-extender/loader.js?&mac=9Wa...6.5 KiB
/combo?browserId=chrome&minifierType=css&themeId=ub_WAR_u...3.1 KiB
/o/ub-theme/css/main.css?browserId=chrome&themeId=ub_WAR_...117.1 KiB200 ms
consent.cookiebot.com/uc.js35.7 KiB323 ms
/o/frontend-js-aui-web/alloy_ui.css?&mac=favIEq7hPo8AEd6k...184 B
/o/ub-theme/css/clay.css?browserId=chrome&themeId=ub_WAR_...69.7 KiB200 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 231 ms
URLTime Spent
ub.edu/231 ms
web.ub.edu/web/ub/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Actualitat Tota l'actualitat INSTITUCIONAL 21-04-2026 La UB presenta al CRAI… div#main-content > div.portlet-layout > div.row > div#column-top
0.104
UB.EDU Directori PTGAS i PDI Estudiants CA La UB Aprèn Investiga Transferència… div#wrapper > header#banner > div.container-xl > div#respon-navs
0.070
UB.EDU Directori PTGAS i PDI Estudiants div#respon-navs > div.navigation-top > div#p_p_id_com_liferay_journal_content_web_portlet_JournalContentPortlet_INSTANCE_menusuperior_ > section#portlet_com_liferay_journal_content_web_portlet_JournalContentPortlet_INSTANCE_menusuperior
0.001

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 24.6 KiB
URLTransfer SizeEst Savings
/o/ub-theme/css/clay.css?browserId=chrome&themeId=ub_WAR_...69.7 KiB12.3 KiB
/o/ub-theme/css/main.css?browserId=chrome&themeId=ub_WAR_...117.1 KiB12.3 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 10.4 KiB
URLTransfer SizeEst Savings
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...77.0 KiB10.4 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 260 ms 190.2 KiB
URLTransfer SizeEst Savings
/o/ub-theme/css/main.css?browserId=chrome&themeId=ub_WAR_...117.0 KiB111.8 KiB
/o/ub-theme/css/clay.css?browserId=chrome&themeId=ub_WAR_...69.6 KiB68.3 KiB
13.5 KiB10.2 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 344.4 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtm.js?id=GTM-MLPG24R175.6 KiB71.3 KiB
www.googletagmanager.com/gtag/js?id=G-5BRF8HTDBV&cx=c&gtm=4e64h1150.6 KiB63.5 KiB
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...77.0 KiB58.2 KiB
/combo?browserId=chrome&minifierType=js&languageId=ca_ES&...107.6 KiB52.5 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.6 KiB
web.ub.edu/o/frontend-taglib-clay/__liferay__/exports/@clayui$core.js43.6 KiB34.0 KiB
/88355e31-7fef-4d33-b6e9-f715351dd339/cc.js?renew=false&r...131.8 KiB27.4 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/documents/2685349/2688302/jornades-torres-home.jpg/b7fb5...352.1 KiB
/documents/2685349/2688302/Edifici-Historic-UB_targetes.j...246.5 KiB
/documents/2685349/6785461/AF_APADRINA26_CanalsUB_ONLINE_...228.6 KiB
/documents/2685349/6785461/cartell_SJ26_destacadafora.jpg...209.9 KiB
/documents/2685349/6785461/Jardíndp.jpg/8434d795-46cf-f9...206.1 KiB
/documents/2685349/6785461/egipte042026G.jpg/d15f98fb-16e...186.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-MLPG24R176.0 KiB
www.googletagmanager.com/gtag/js?id=G-5BRF8HTDBV&cx=c&gtm=4e64h1150.7 KiB
/documents/2685349/2686580/marca_peu_150.png.jpg/d1edc411...146.7 KiB
/88355e31-7fef-4d33-b6e9-f715351dd339/cc.js?renew=false&r...132.1 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Red Vives ul.institucional-links > li > a > img
/documents/2685349/2686580/xarxa-vives.svg/b88fd4f8-a2ad-...
LERU ul.institucional-links > li > a > img
/documents/2685349/2686580/leru.svg/86b79a07-9ec5-05da-a8...
Excel·lència internacional HR ul.institucional-links > li > a > img
/documents/2685349/2686580/hr.svg/f01a0bc8-fb54-444b-e30e...
Charm-EU li > a > picture > img
/documents/2685349/2686580/charm-eu.png/acfeb475-bbbc-d63...
Icona usuari ul > li > a > img
/documents/2685349/2686580/usuari.svg/e2128230-b4b2-0c9d-...
Icona enllaç extern ul > li > a > img
/documents/2685349/2686580/enllac-extern.svg/27e74544-80d...
Icona enllaç extern ul > li > a > img
/documents/2685349/2686580/enllac-extern.svg/27e74544-80d...
div.navigation-bottom > div.options > button.btnSearch > img.icon-show div.navigation-bottom > div.options > button.btnSearch > img.icon-show
web.ub.edu/o/ub-theme/images/ico/Search.svg
Charter for Higher Education li > a > picture > img
/documents/2685349/2686580/MicrosoftTeams-image.png/97926...

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Max Potential First Input Delay 90 ms
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.5 s
●Minimizes main-thread work 1.2 s
●Avoid long main-thread tasks 3 long tasks found
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 480 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 120 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
97

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Tables and lists

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Avís legal div.row > div.col-6 > ul.terminos > li
Galetes div.row > div.col-6 > ul.terminos > li
Accessibilitat div.row > div.col-6 > ul.terminos > li
Contacte div.row > div.col-6 > ul.terminos > li
Botiga UB div.row > div.col-6 > ul.terminos > li
Edicions UB div.row > div.col-6 > ul.terminos > li
Lloguer d’espais div.row > div.col-6 > ul.terminos > li
Seu electrònica div.row > div.col-xl-3 > ul.destacados > li
Portal de transparència div.row > div.col-xl-3 > ul.destacados > li
Bústia ètica div.row > div.col-xl-3 > ul.destacados > li

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
●`[role]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●Select elements have associated label elements.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
web.ub.edu/o/ub-theme/js/glider/glider.min.js line 15, col 207
TypeError: Cannot read properties of null (reading '_glider') at new a.Glider (https://web.ub.edu/o/ub-theme/js/glider/glider.min.js:16:208) at Object.<anonymous> (https://web.ub.edu/web/ub/:1322:30) at e.Subscriber._notify (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:361:51) at e.Subscriber.notify (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:361:245) at e.CustomEvent._notify (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:360:4257) at e.CustomEvent._procSubs (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:360:4916) at u.fireComplex (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:364:1402) at e.CustomEvent._fire (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:360:4519) at Object.fire (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:361:5483) at Object.onLoad (https://web.ub.edu/combo?browserId=chrome&minifierType=js&languageId=ca_ES&t=1776410387027&/o/frontend-js-aui-web/aui/aui/aui-min.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base-min.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex-min.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core-min.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable-min.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras-min.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base-min.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex-min.js&/o/frontend-js-aui-web/aui/oop/oop-min.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang-min.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js&/o/oauth2-provider-web/js/liferay.js:2951:13)
web.ub.edu/web/ub/ line 1223, col 20
TypeError: Cannot read properties of null (reading 'addEventListener') at HTMLDocument.<anonymous> (https://web.ub.edu/web/ub/:1224:21)
web.ub.edu/web/ub/ line 1223, col 20
TypeError: Cannot read properties of null (reading 'addEventListener') at HTMLDocument.<anonymous> (https://web.ub.edu/web/ub/:1224:21) at window.CookieControl.Cookie.applyOverrideEventListeners (https://consent.cookiebot.com/uc.js:2:108581) at https://consent.cookiebot.com/uc.js:2:17334
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`

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