Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
www.um.es/o/um-lr-74-principal-theme/fonts/FlechaM-Regular.woff2	380 ms
www.um.es/o/um-lr-74-principal-theme/fonts/FlechaM-RegularItalic.woff2	360 ms

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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:35.366 source:map[column:197 line:821 type:source-location url:https://www.googletagmanager.com/gtag/js?id=G-C35G871LG6&cx=c&gtm=4e64k1 urlProvider:network]]]

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:35.366 source:map[column:55 line:818 type:source-location url:https://www.googletagmanager.com/gtag/js?id=G-C35G871LG6&cx=c&gtm=4e64k1 urlProvider:network]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: Elecciones en la UMU

path: 1,HTML,1,BODY,3,DIV,5,SECTION,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,PICTURE,2,IMG

selector: div.um-home-cover > div.um-home-cover__image-wrapper > picture > img.um-lr-gtm-principal-panel-portada-3-img

snippet: <img alt="Elecciones en la UMU" data-fileentryid="64720749" src="https://www.um.es/o/adaptive-media/image/64720749/Preview-1000x0/eleccione…" class="um-lr-gtm-principal-panel-portada-3-img um-home-cover__image" data-date-start="08:00 13/04/2026" data-date-end="08:00 30/04/2026" data-position="ip">

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.

URL	Transfer Size	Duration
/o/um-lr-74-principal-theme/js/um_mobile_header.js?browse...	472 B
/o/um-lr-74-principal-theme/js/components/um-agenda-siu.j...	9.2 KiB
/o/um-lr-74-principal-theme/js/um_portada_video.js?browse...	903 B
/o/um-lr-74-principal-theme/js/components/um-scroll-to-to...	507 B
/o/um-lr-74-principal-theme/js/um_footer.js?browserId=chr...	306 B
/o/um-lr-74-principal-theme/js/um-plugins/um-miweb-relaci...	5.5 KiB	150 ms
/o/um-lr-74-principal-theme/js/um_header.js?browserId=chr...	5.0 KiB
/o/um-lr-74-principal-theme/js/components/um-presentacion...	680 B
/o/um-lr-74-principal-theme/js/components/um-videos.js?br...	621 B
/o/um-lr-74-principal-theme/js/components/um-horizontal-s...	1.5 KiB
/o/um-lr-74-principal-theme/js/components/um-menu-flotant...	3.4 KiB
/o/um-lr-74-principal-theme/js/vendor/jquery.responsiveTa...	2.6 KiB
/o/um-lr-74-principal-theme/js/components/um-data-banner....	1.3 KiB
/o/um-lr-74-principal-theme/js/components/um-scroll-detec...	3.1 KiB
/o/um-lr-74-principal-theme/js/components/um-avisos.js?br...	1.5 KiB
/o/um-lr-74-principal-theme/js/um_mobile_header.js?browse...	495 B
/o/um-lr-74-principal-theme/js/components/um-link-list.js...	2.0 KiB	150 ms
/o/um-lr-74-principal-theme/js/utils/um-utils.js?browserI...	1.6 KiB
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	77.2 KiB	450 ms
/o/um-lr-74-principal-theme/js/utils/um-set-scrollbar-wid...	387 B
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	109.5 KiB	600 ms
www.um.es/o/commerce-frontend-js/styles/main.css	5.6 KiB
/1.10.11/js/jquery.dataTables.min.js?browserId=chrome&min...	26.8 KiB	331 ms
/buttons/1.1.2/css/buttons.dataTables.min.css?browserId=c...	1.6 KiB	810 ms
/buttons/1.1.2/js/dataTables.buttons.min.js?browserId=chr...	5.1 KiB	165 ms
/buttons/1.1.2/js/buttons.colVis.min.js?browserId=chrome&...	1.1 KiB
/plug-ins/1.11.5/filtering/type-based/accent-neutralise.j...	965 B
/o/frontend-js-loader-modules-extender/loader.js?&mac=9Wa...	6.5 KiB
/combo?browserId=chrome&minifierType=css&themeId=umlr74pr...	2.7 KiB	150 ms
/o/um-lr-74-principal-theme/css/main.css?browserId=chrome...	61.2 KiB	600 ms
/o/um-lr-74-principal-theme/css/clay.css?browserId=chrome...	70.1 KiB	750 ms

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.

Request	Cache TTL	Transfer Size
www.um.es/o/um-lr-74-principal-theme/fonts/IBMPlexSans-Medium.ttf	0.0 ms	79.9 KiB
www.um.es/o/um-lr-74-principal-theme/fonts/IBMPlexSans-Regular.ttf	0.0 ms	75.8 KiB
www.um.es/o/um-lr-74-principal-theme/fonts/IBMPlexSansCondensed-SemiBold.ttf	0.0 ms	49.5 KiB
www.um.es/o/um-lr-74-principal-theme/fonts/FlechaM-RegularItalic.woff2	0.0 ms	39.9 KiB
www.um.es/o/um-lr-74-principal-theme/fonts/FlechaM-Regular.woff2	0.0 ms	38.5 KiB
www.um.es/o/um-lr-74-principal-theme/images/logo-redondo-rojo-claro-simple.svg	0.0 ms	3.4 KiB
www.um.es/o/um-lr-74-principal-theme/images/um-logo-light.svg	0.0 ms	2.7 KiB
www.um.es/o/um-lr-74-principal-theme/images/um-logo-dark-centered.svg	0.0 ms	2.7 KiB
www.um.es/o/um-lr-74-principal-theme/images/icons/user.svg	0.0 ms	902 B
www.um.es/o/um-lr-74-principal-theme/images/icons/search.svg	0.0 ms	707 B
www.um.es/o/um-lr-74-principal-theme/images/icons/avisos.svg	0.0 ms	388 B
www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg	0.0 ms	280 B
www.um.es/o/um-lr-74-principal-theme/images/icons/close.svg	0.0 ms	267 B
www.um.es/o/um-lr-74-principal-theme/images/icons/mobile-menu-closed.svg	0.0 ms	246 B

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.

	URL	Resource Size	Est Savings
Foto de grupo del encuentro `a.um-sticky-news__link > div.um-sticky-news__item-image > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64793932/Preview-1000x0/EUGANOM_m...	119.4 KiB	112.2 KiB
David Martínez, Jefe del Área de Relaciones Internacionales, y Carmen Escribano… `a.um-sticky-news__link > div.um-sticky-news__item-image > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64787032/Preview-1000x0/crue_lasp...	90.7 KiB	83.6 KiB
Foto de grupo `div.um-noticias-7030__content > div.um-noticias-7030__imagen > picture > img`	/o/adaptive-media/image/64655752/Preview-1000x0/pdi_11032...	95.2 KiB	79.2 KiB
Alicia Rubio y Samuel Baixauli `a.um-sticky-news__link > div.um-sticky-news__item-image > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64795319/Preview-1000x0/2vuelta.j...	76.8 KiB	70.6 KiB
Cartel del ciclo de conferencias `a.um-sticky-news__link > div.um-sticky-news__item-image > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64777700/Preview-1000x0/fiumers_p...	47.9 KiB	40.1 KiB
Elecciones en la UMU `div.um-home-cover > div.um-home-cover__image-wrapper > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64720749/Preview-1000x0/eleccione...	77.9 KiB	31.1 KiB
Tomando apuntes en archivador `a.um-sticky-news__link > div.um-sticky-news__item-image > picture > img.um-lr-gtm-principal-panel-portada-3-img`	/o/adaptive-media/image/64781787/Preview-1000x0/foto_exam...	21.1 KiB	15.1 KiB
Web Campus Mare Nostrum `a.Web > picture > picture > img`	/documents/2192611/37956441/logo-cmn+2.png/adaab738-6e43-...	9.6 KiB	7.9 KiB

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: 816 ms

URL	Time Spent
um.es/	816 ms
www.um.es/	0.0 ms

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

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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: 0.0 ms 22.9 KiB

URL	Transfer Size	Est Savings
/o/um-lr-74-principal-theme/css/clay.css?browserId=chrome...	70.1 KiB	13.0 KiB
/o/um-lr-74-principal-theme/css/main.css?browserId=chrome...	61.2 KiB	9.9 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: 0.0 ms 19.4 KiB

URL	Transfer Size	Est Savings
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	77.1 KiB	10.4 KiB
/o/um-lr-74-principal-theme/js/components/um-agenda-siu.j...	9.1 KiB	4.1 KiB
/o/um-lr-74-principal-theme/js/um_header.js?browserId=chr...	4.9 KiB	2.5 KiB
/o/um-lr-74-principal-theme/js/um-plugins/um-miweb-relaci...	5.5 KiB	2.3 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: 300 ms 125.3 KiB

URL	Transfer Size	Est Savings
/o/um-lr-74-principal-theme/css/clay.css?browserId=chrome...	70.0 KiB	69.2 KiB
/o/um-lr-74-principal-theme/css/main.css?browserId=chrome...	61.2 KiB	56.1 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: 1.4 s 335.2 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtm.js?id=GTM-TWBMMX	139.5 KiB	69.9 KiB
www.googletagmanager.com/gtag/js?id=G-C35G871LG6&cx=c&gtm=4e64k1	157.0 KiB	66.4 KiB
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	77.1 KiB	56.2 KiB
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	109.4 KiB	53.2 KiB
cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.js	62.2 KiB	36.6 KiB
www.um.es/o/frontend-taglib-clay/__liferay__/exports/@clayui$core.js	39.3 KiB	30.9 KiB
/1.10.11/js/jquery.dataTables.min.js?browserId=chrome&min...	26.2 KiB	21.9 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.um.es/	4.4 s	36 ms	14 ms
Unattributable	855 ms	194 ms	0.0 ms
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	753 ms	609 ms	34 ms
www.googletagmanager.com/gtag/js?id=G-C35G871LG6&cx=c&gtm=4e64k1	384 ms	202 ms	38 ms
cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.js	257 ms	185 ms	20 ms
www.googletagmanager.com/gtm.js?id=GTM-TWBMMX	193 ms	145 ms	38 ms
/combo?browserId=chrome&minifierType=js&languageId=es_ES&...	135 ms	93 ms	27 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Other	2.6 s
Style & Layout	1.8 s
Script Evaluation	1.5 s
Rendering	873 ms
Script Parsing & Compilation	215 ms
Parse HTML & CSS	114 ms
Garbage Collection	26 ms

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 reason	Failure 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

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
Logo Universidad de Murcia `div.um-footer > div.row > div.col-12 > img`	www.um.es/o/um-lr-74-principal-theme/images/um-logo-light.svg
Web European University for Well-Being `a.Web > picture > picture > img`	/documents/2192611/37956441/EUNIWELL+2.png/f7c41235-e85f-...
Logo campaña Ucrania `div.col-4 > picture > picture > img`	/documents/2192611/37956441/crueconucrania_version_bn+2.p...
Web Human Resources Strategy for Researchers `a.Web > picture > picture > img`	/documents/2192611/37956441/hr_b_n+2.png/caa05305-ea1e-ee...
Web Fondos Europeos de la Universidad de Murcia `a.Web > picture > picture > img`	/documents/2192611/37956441/logo-union-europea+2.png/f815...
Web Campus Mare Nostrum `a.Web > picture > picture > img`	/documents/2192611/37956441/logo-cmn+2.png/adaab738-6e43-...
Escudo Universidad de Murcia `nav#mobile-header > div.mobile-header__top > a.mobile-header__logo-link > img.mobile-header__logo`	www.um.es/o/um-lr-74-principal-theme/images/um-logo-dark-centered.svg
Universidad de Murcia `div#wrapper > nav#mobile-header > div.mobile-header__top > img.mobile-header__brand`	www.um.es/o/um-lr-74-principal-theme/images/logo-redondo-rojo-claro-simple.svg
Abrir menú `div.mobile-header__top > div.mobile-header__menus > button#mobile-menu-toggle-button > img#mobile-menu-icon`	www.um.es/o/um-lr-74-principal-theme/images/icons/mobile-menu-closed.svg
flecha `div#eventos_agenda_div > div.um-home-events__item > div.um-home-events__item-footer > img`	www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg
flecha `div#eventos_agenda_div > div.um-home-events__item > div.um-home-events__item-footer > img`	www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg
flecha `div#eventos_agenda_div > div.um-home-events__item > div.um-home-events__item-footer > img`	www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg
flecha `div#eventos_agenda_div > div.um-home-events__item > div.um-home-events__item-footer > img`	www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg
flecha `div#eventos_agenda_div > div.um-home-events__item > div.um-home-events__item-footer > img`	www.um.es/o/um-lr-74-principal-theme/images/icons/arrow--up-right.svg

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

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Avoids enormous network payloads Total size was 1,956 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 11 long tasks found

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 230 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 280 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

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.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Servicio de Información Universitario `div.col-12 > ul.list-unstyled > li.um-footer-links__item > a.um-footer-links__contacto`
Información - 868 88 88 88 `div.col-12 > ul.list-unstyled > li.um-footer-links__item > a.um-footer-links__contacto`
Centralita - 868 88 30 00 `div.col-12 > ul.list-unstyled > li.um-footer-links__item > a.um-footer-links__contacto`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ELECCIONES A RECTOR/A Y CLAUSTRO UNIVERSITARIO: CONSULTA DE RESULTADOS · ELECCI… `div > div.journal-content-article > div#Marquesina-61997176 > a.um-news-marquee__link`
Alicia Rubio y Samuel Baixauli disputarán la segunda vuelta de las elecciones a… `div.um-horizontal-scroll__wrapper > div.col-md-6 > div.um-sticky-news__item > a.um-sticky-news__link`
Encuentro en la UMU de especialistas europeos en gestión de proyectos de la UE … `div.row > div.col-12 > div.um-sticky-news__item > a.um-sticky-news__link`

○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

●`[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

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●`[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 have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○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

○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

○Form elements have associated labels

○Links are distinguishable without relying on color.

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○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.

100

Best Practices

●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 browser errors logged to the console

●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

100

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.

○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`

●Document has a valid `rel=canonical`