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
/sites/all/libraries/font-awesome/4.7.0/fonts/fontawesome...	140 ms
/sites/all/themes/custom/cnr03_theme/fonts/roboto-v29-lat...	70 ms
/sites/all/themes/custom/cnr03_theme/fonts/roboto-v29-lat...	35 ms

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:363.023 label:Time to first byte subpart:timeToFirstByte] map[duration:520.481 label:Resource load delay subpart:resourceLoadDelay] map[duration:110.223 label:Resource load duration subpart:resourceLoadDuration] map[duration:1959.382 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img

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

selector: article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img

snippet: <img alt="" src="https://www.cnr.it/sites/default/files/public/styles/box_style_16_9/public…" data-dont-wait-for-me="yes" style="">

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: article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img

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

selector: article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img

snippet: <img alt="" src="https://www.cnr.it/sites/default/files/public/styles/box_style_16_9/public…" data-dont-wait-for-me="yes" style="">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.cnr.it//	http/1.1
www.cnr.it/modules/system/system.base.css?tdslzg	http/1.1
www.cnr.it/sites/all/modules/contrib/date/date_api/date.css?tdslzg	http/1.1
/sites/all/modules/contrib/date/date_popup/themes/datepic...	http/1.1
www.cnr.it/modules/field/theme/field.css?tdslzg	http/1.1
www.cnr.it/sites/all/modules/contrib/views/css/views.css?tdslzg	http/1.1
www.cnr.it/sites/all/modules/contrib/ctools/css/ctools.css?tdslzg	http/1.1
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/magnific-popup.css?tdslzg	http/1.1
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/mediaBoxes.css?tdslzg	http/1.1
/sites/all/libraries/font-awesome/4.7.0/css/font-awesome....	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/css/style.min.css?tdslzg	http/1.1
/sites/all/modules/contrib/jquery_update/replace/jquery/1...	http/1.1
www.cnr.it/misc/jquery-extend-3.4.0.js?v=1.9.1	http/1.1
www.cnr.it/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.9.1	http/1.1
www.cnr.it/misc/jquery.once.js?v=1.2	http/1.1
www.cnr.it/misc/drupal.js?tdslzg	http/1.1
/sites/default/files/public/languages/it_xynrdDYaqrWADU-W...	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/affix.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/alert.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/button.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/carousel.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/collapse.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/dropdown.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/modal.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/tooltip.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/popover.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/scrollspy.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/tab.js?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/transition.js?tdslzg	http/1.1
/sites/all/themes/custom/cnr03_theme/bootstrap_dropdowns_...	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/jquery.isotope...	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/jquery.imagesL...	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/jquery.transit...	http/1.1
www.cnr.it/sites/all/libraries/mediaboxes/plugins/js/jquery.easing.js?tdslzg	http/1.1
www.cnr.it/sites/all/libraries/mediaboxes/plugins/js/waypoints.min.js?tdslzg	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/modernizr.cust...	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/jquery.magnifi...	http/1.1
/sites/all/libraries/mediaboxes/plugins/js/jquery.mediaBo...	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/cnrlogo.svg?tdslzg	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-cittadini.png	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-imprese.png	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-scuole.png	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-ricercatori.png	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-giornalisti.png	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/icon-amministrazioni.png	http/1.1
www.cnr.it/sites/all/themes/contrib/bootstrap/js/bootstrap.js?tdslzg	http/1.1
/sites/all/themes/custom/cnr03_theme/fonts/roboto-v29-lat...	http/1.1
/sites/all/themes/custom/cnr03_theme/fonts/roboto-v29-lat...	http/1.1
/sites/all/libraries/font-awesome/4.7.0/fonts/fontawesome...	http/1.1
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/icons/loading-image.gif	http/1.1
/sites/default/files/public/styles/box_style_16_9/public/...	http/1.1
/sites/default/files/public/styles/box_style_21_9/public/...	http/1.1
/sites/default/files/public/styles/box_style_21_9/public/...	http/1.1
/sites/default/files/public/styles/box_style_16_9/public/...	http/1.1
/sites/default/files/public/styles/box_style_4_3/public/u...	http/1.1
/sites/default/files/public/styles/box_style_14_9/public/...	http/1.1
www.cnr.it/sites/all/themes/custom/cnr03_theme/img/favicon-cnrlogo.png	http/1.1

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

value: No additional origins are good candidates for preconnecting

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
/sites/all/libraries/mediaboxes/plugins/js/jquery.mediaBo...	9.0 KiB	752 ms
/sites/all/libraries/mediaboxes/plugins/js/jquery.magnifi...	14.0 KiB	752 ms
/sites/all/libraries/mediaboxes/plugins/js/modernizr.cust...	1.4 KiB	452 ms
www.cnr.it/sites/all/libraries/mediaboxes/plugins/js/waypoints.min.js?tdslzg	3.0 KiB	602 ms
www.cnr.it/sites/all/libraries/mediaboxes/plugins/js/jquery.easing.js?tdslzg	2.4 KiB	452 ms
/sites/all/libraries/mediaboxes/plugins/js/jquery.transit...	3.2 KiB	602 ms
/sites/all/libraries/mediaboxes/plugins/js/jquery.imagesL...	2.8 KiB	452 ms
/sites/all/libraries/mediaboxes/plugins/js/jquery.isotope...	10.1 KiB	902 ms
/sites/all/themes/custom/cnr03_theme/bootstrap_dropdowns_...	2.9 KiB	602 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/transition.js?tdslzg	1.2 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/tab.js?tdslzg	1.6 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/popover.js?tdslzg	1.6 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/scrollspy.js?tdslzg	1.9 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/tooltip.js?tdslzg	4.4 KiB	602 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/modal.js?tdslzg	2.7 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/dropdown.js?tdslzg	1.9 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/carousel.js?tdslzg	2.5 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/collapse.js?tdslzg	1.9 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/button.js?tdslzg	1.6 KiB	452 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/css/style.min.css?tdslzg	35.2 KiB	2.3 s
/sites/all/modules/contrib/jquery_update/replace/jquery/1...	32.5 KiB	2.1 s
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/alert.js?tdslzg	1.4 KiB	452 ms
/sites/default/files/public/languages/it_xynrdDYaqrWADU-W...	2.1 KiB	452 ms
www.cnr.it/misc/drupal.js?tdslzg	7.4 KiB	752 ms
www.cnr.it/sites/all/themes/custom/cnr03_theme/bootstrap/js/affix.js?tdslzg	1.9 KiB	452 ms
www.cnr.it/misc/jquery.once.js?v=1.2	1.5 KiB	452 ms
www.cnr.it/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.9.1	4.9 KiB	602 ms
/sites/all/libraries/font-awesome/4.7.0/css/font-awesome....	7.3 KiB	752 ms
www.cnr.it/misc/jquery-extend-3.4.0.js?v=1.9.1	1.8 KiB	452 ms
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/mediaBoxes.css?tdslzg	9.1 KiB	902 ms
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/magnific-popup.css?tdslzg	2.3 KiB	452 ms
www.cnr.it/sites/all/modules/contrib/views/css/views.css?tdslzg	794 B	452 ms
www.cnr.it/sites/all/modules/contrib/ctools/css/ctools.css?tdslzg	732 B	452 ms
www.cnr.it/modules/field/theme/field.css?tdslzg	689 B	452 ms
/sites/all/modules/contrib/date/date_popup/themes/datepic...	1.3 KiB	452 ms
www.cnr.it/sites/all/modules/contrib/date/date_api/date.css?tdslzg	1.6 KiB	452 ms
www.cnr.it/modules/system/system.base.css?tdslzg	2.3 KiB	152 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
metrics.cedrc.cnr.it/matomo.js	3600.0 s	62.5 KiB

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
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_4_3/public/u...	566.3 KiB	548.5 KiB
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_21_9/public/...	486.3 KiB	476.2 KiB
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_14_9/public/...	112.1 KiB	99.5 KiB
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_16_9/public/...	86.5 KiB	76.8 KiB
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_16_9/public/...	41.8 KiB	37.1 KiB
article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img `article.media-box-container > div.media-box-image > div.media-box-thumbnail-container > img`	/sites/default/files/public/styles/box_style_21_9/public/...	37.3 KiB	33.2 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: 752 ms

URL	Time Spent
cnr.it/	752 ms
www.cnr.it//	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

Diagnostics

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 16.9 KiB

URL	Transfer Size	Est Savings
/sites/all/libraries/mediaboxes/plugins/js/jquery.magnifi...	13.5 KiB	4.9 KiB
www.cnr.it/misc/drupal.js?tdslzg	6.9 KiB	4.6 KiB
/sites/all/libraries/mediaboxes/plugins/js/jquery.mediaBo...	8.6 KiB	4.2 KiB
www.cnr.it/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.9.1	4.4 KiB	3.1 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: 150 ms 33.4 KiB

URL	Transfer Size	Est Savings
www.cnr.it/sites/all/themes/custom/cnr03_theme/css/style.min.css?tdslzg	34.7 KiB	33.4 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: 150 ms 37.3 KiB

URL	Transfer Size	Est Savings
metrics.cedrc.cnr.it/matomo.js	62.2 KiB	37.3 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 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

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 2.1 KiB

URL	Transfer Size	Est Savings
www.cnr.it/sites/all/libraries/mediaboxes/plugins/css/mediaBoxes.css?tdslzg	9.1 KiB	2.1 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
CNR - Consiglio Nazionale delle Ricerche `div > div#logo > a > img`	www.cnr.it/sites/all/themes/custom/cnr03_theme/img/cnrlogo.svg?tdslzg

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

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●Optimize viewport for mobile

●Max Potential First Input Delay 40 ms

●Avoids enormous network payloads Total size was 1,834 KiB

●JavaScript execution time 0.3 s

●Minimizes main-thread work 1.1 s

●Avoid long main-thread tasks 1 long task found

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 60 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Comunicato stampa 21/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Nota stampa 21/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Evento 21/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Nota stampa 20/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Nota stampa 20/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Evento 22/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Nota stampa 17/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
Comunicato stampa 14/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
News 17/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`
News 14/04/2026 `div.image > article.media-box-container > div.media-box-content > div.media-box-date`

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Devolvi il 5x1000 al Cnr `div.row > div#footer-address > p > a`
protocollo-ammcen@pec.cnr.it `div.row > div#footer-address > p > a`

These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Facebook Twitter Instagram LinkedIn WhatsApp `div#menu-bottom > div.menu-bottom-wrapper > section.social-network > ul`

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

Best practices

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html.js `html.js`

These items highlight common accessibility best practices.

○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-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●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.

●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

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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

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

○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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted 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

○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

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○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

○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.

○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.

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

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

●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`