Lighthouse Mobile
· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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.
Performance issues directly impact user engagement and conversion rates.
Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| usal.es/ | 1.7 s |
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.
Performance issues directly impact user engagement and conversion rates.
Diagnostics
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| usal.es/misc/drupal.js?tcelcq | 6.9 KiB | 4.6 KiB |
| /sites/all/modules/contrib/tabvn/flexslider_format/js/jqu... | 8.9 KiB | 3.7 KiB |
| /sites/all/modules/contrib/glazed_builder/glazed_builder/... | 8.6 KiB | 3.7 KiB |
| usal.es/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.7.2 | 4.4 KiB | 3.1 KiB |
| /sites/all/modules/contrib/eu_cookie_compliance/js/eu_coo... | 8.3 KiB | 2.4 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| usal.es/sites/all/themes/momentum/css/bootstrap.css?tcelcq | 21.9 KiB | 21.4 KiB |
| /sites/all/modules/contrib/glazed_builder/glazed_builder/... | 19.3 KiB | 18.7 KiB |
| cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css | 18.5 KiB | 18.3 KiB |
| cdnjs.cloudflare.com/ajax/libs/font-awesome/6.6.0/css/all.min.css | 18.3 KiB | 18.1 KiB |
| use.fontawesome.com/releases/v5.8.1/css/all.css | 12.5 KiB | 12.5 KiB |
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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 1.1 s |
| Other | 995 ms |
| Style & Layout | 440 ms |
| Parse HTML & CSS | 177 ms |
| Script Parsing & Compilation | 165 ms |
| Rendering | 110 ms |
| Garbage Collection | 22 ms |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| usal.es/sites/all/themes/momentum/css/bootstrap.css?tcelcq | 22.2 KiB | 3.8 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-FV1PMJH0R9&cx=c>m=4e64k1 | 169.1 KiB | 68.1 KiB |
| www.googletagmanager.com/gtag/js?id=G-J6GBF0VEHC&cx=c&_slc=1 | 150.4 KiB | 62.9 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-PBSQRX6 | 128.7 KiB | 62.1 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/grande_web_science_late_night.jpg?fid=86884 |
div.owl-item > div.az-element > div.az-element > img div.owl-item > div.az-element > div.az-element > img | /files/glazed-builder/datos-ofertaacademica-usal-11junio2... |
div.owl-item > div.az-element > div.az-element > img div.owl-item > div.az-element > div.az-element > img | usal.es/files/glazed-builder/datos-instalaciones-usal.jpg?fid=61058 |
div.owl-item > div.az-element > div.az-element > img div.owl-item > div.az-element > div.az-element > img | usal.es/files/glazed-builder/datos-investigacion-usal.png?fid=60991 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/pequena_web_audiencia.jpg?fid=86878 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/pequena_web_puerto.jpg?fid=86879 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/pequena_web_ecuador.jpg?fid=86881 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/pequena_web_colombianos.jpg?fid=86882 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/img_eventum_portada_16.png?fid=86601 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/movilidad-internacional.jpg?fid=60997 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/bibliotecas.jpg?fid=60998 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/becas-ayudas-estudio.jpg?fid=60999 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/formacion-permanente.jpg?fid=61055 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/empleo-emprendimiento.jpg?fid=61001 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/actividades-culturales.jpg?fid=61002 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/deportes.jpg?fid=61003 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/asuntos-sociales.jpg?fid=61004 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/colegios-residencias-comedores.jpg?fid=61005 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/orientacion-academica.jpg?fid=61028 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/asociaciones-estudiantes.jpg?fid=61029 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/idiomas.jpg?fid=61030 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/innovacion-emprendimiento.jpg?fid=61034 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/produccion-cientifica.jpg?fid=61049 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/hrs4r_1.jpg?fid=80860 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/agencia-gestion-investigacion.jpg?fid=61006 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/oficina-proyectos-internacionales.jpg?fid=61009 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/nucleus.jpg?fid=61031 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/propiedad-intelectual.jpg?fid=61048 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/ediciones.jpg?fid=61032 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/cultura-cientifica.jpg?fid=61050 |
div.az-element > div.az-element > a > img div.az-element > div.az-element > a > img | usal.es/files/glazed-builder/donasangre.png?fid=81724 |
div#footer-3 > div.container > div > img div#footer-3 > div.container > div > img | usal.es/sites/all/themes/momentum/images/usal/logo_usal_footer2.png |
div.az-element > div.az-element > div.az-element > img div.az-element > div.az-element > div.az-element > img | /files/glazed-builder/marca-quinto-centenario-escuela-sal... |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Contrast
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Esta página web utiliza cookies propias y de terceros con fines técnicos, de an… div.eu-cookie-compliance-banner > div.popup-content > div#popup-text > p |
MAS INFORMACIÓN div.eu-cookie-compliance-banner > div.popup-content > div#popup-text > button.find-more-button |
DE ACUERDO div.eu-cookie-compliance-banner > div.popup-content > div#popup-buttons > button.agree-button |
ACTUALIDAD div.az-element > div.az-element > div.az-element > p |
AGENDA div#gbqg3zh95n > div.az-ctnr > div.az-element > p |
MAR - MAY | div.az-element > p > strong > span |
EXPOSICIÓN. LOVE WILL (not) TEAR US APART div.az-element > div.az-element > p > a |
9 ABR - 29 ABR | div.az-element > p > strong > span |
CAMPAÑA DE DONACIÓN DE SANGRE div.az-element > div.az-element > p > a |
POR QUÉ ESTUDIAR EN LA USAL div#gb477fbv2x > div.az-ctnr > div.az-element > p |
INVESTIGACIÓN Y TRANSFERENCIA div#gb3qrhnqjv > div.az-ctnr > div.az-element > p |
AVISO LEGAL | POLÍTICA DE COOKIES div#footer-3 > div.container > p > a |
These are opportunities to improve the legibility of your content.
Names and labels
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div#footer-3 > div.container > div > img div#footer-3 > div.container > div > img |
Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.az-element > div.az-element > div.az-element > iframe div.az-element > div.az-element > div.az-element > iframe |
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Inicio div.top-bar > div.container > div.tb-logo > a.scrollto |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div.az-element > div.az-element > div.az-element > a div.az-element > div.az-element > div.az-element > a |
div#content > div.row > div.col-md-3 > a div#content > div.row > div.col-md-3 > a |
div#content > div.row > div.col-md-3 > a div#content > div.row > div.col-md-3 > a |
div#content > div.row > div.col-md-3 > a div#content > div.row > div.col-md-3 > a |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
+34 923 29 44 00 div#content > div.row > div.col-md-3 > a |
+34 923 29 45 00 div#content > div.row > div.col-md-3 > a |
One main landmark helps screen reader users navigate a web page. Learn more about landmarks.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
html.js html.js |
These items highlight common accessibility best practices.
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
/sites/all/modules/contrib/glazed_builder/glazed_builder/... line 5, col 220 | Error: Bootstrap's JavaScript requires jQuery version 1.9.1 or higher, but lower than version 4
at https://usal.es/sites/all/modules/contrib/glazed_builder/glazed_builder/vendor/bootstrap-custom/js/bootstrap.min.js?tcelcq:6:221
at https://usal.es/sites/all/modules/contrib/glazed_builder/glazed_builder/vendor/bootstrap-custom/js/bootstrap.min.js?tcelcq:6:323 |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) | |
Failed to load resource: the server responded with a status of 404 (Not Found) |
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
Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.
Performance issues directly impact user engagement and conversion rates.
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| /rector-juan-manuel-corchado-inaugura-primer-campus-unive... | MÁS INFORMACIÓN |
| /los-aviones-cirrus-sr20-g7-situan-adventia-como-primera-... | MÁS INFORMACIÓN |
| /universidad-salamanca-colidera-leximus-mayor-investigaci... | MÁS INFORMACIÓN |
| usal.es/preinscripcion-masteres | MÁS INFORMACIÓN |
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div#footer-3 > div.container > div > img div#footer-3 > div.container > div > img |
Canonical links suggest which URL to show in search results. Learn more about canonical links.
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.
Crawling and Indexing
Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable
Performance issues directly impact user engagement and conversion rates.
| Uncrawlable Link |
|---|
Estudia ul.menu > li.first > span.active > a.nivel-superior-menu-rojo |
Investiga ul.menu > li.first > span.active > a.nivel-superior-menu-rojo |
Universidad ul.menu > li.first > span.active > a.nivel-superior-menu-rojo |
Centros y Departamentos ul.menu > li.first > span.active > a |
Servicios ul.menu > li.first > span.active > a |
e-Administración ul.menu > li.first > span.active > a |
Accesos directos ul.menu > li.first > span.active > a |
To appear in search results, crawlers need access to your app.