Lighthouse Desktop

· 0 checks — Desktop 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
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	140 ms
/typo3conf/ext/udem_icons/Resources/Public/fonts/udem-ico...	95 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	95 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	90 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	70 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:40.11 source:map[column:30300 line:2 type:source-location url:https://www.umontreal.ca/typo3conf/ext/udem_vendor/Resources/Public/jquery-3.5.1/jquery.min.js?1604402777 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:0.188 source:map[column:20 line:4640 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.143 source:map[column:14 line:4641 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.087 source:map[column:37 line:4645 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.135 source:map[column:330 line:4645 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.247 source:map[column:36 line:4647 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.063 source:map[column:397 line:4647 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.071 source:map[column:9 line:4648 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.086 source:map[column:193 line:4349 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:0.257 source:map[column:428 line:4340 type:source-location url:https://secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123 urlProvider:network]] map[reflowTime:36.975 source:map[column:51844 line:1 type:source-location url:https://www.umontreal.ca/typo3conf/ext/udem_vendor/Resources/Public/jquery-3.5.1/jquery.min.js?1604402777 urlProvider:network]] map[reflowTime:3.135 source:map[column:51866 line:1 type:source-location url:https://www.umontreal.ca/typo3conf/ext/udem_vendor/Resources/Public/jquery-3.5.1/jquery.min.js?1604402777 urlProvider:network]]]

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
div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/images/portrait_carre/grande_campagne.png	703.0 KiB	681.9 KiB
Du 6 au 9 mai, c'est l'heure de nous rassembler! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg	303.5 KiB	153.8 KiB
div.row > div.news-img-wrap > a > img `div.row > div.news-img-wrap > a > img`	/public/www/_processed_/1/7/csm_1805f2619a7b271d3bbd1de20...	134.8 KiB	119.7 KiB
Il est encore temps de déposer votre candidature! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-Encore-temps.jpg	209.1 KiB	105.6 KiB
div.row > div.news-img-wrap > a > img `div.row > div.news-img-wrap > a > img`	/public/www/_processed_/e/0/csm_313e9d577abb14c6eed905c6b...	102.6 KiB	90.8 KiB
De nouveaux ateliers offerts ce printemps `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-ateliers-culturels.jpg	172.4 KiB	87.0 KiB
div.col-xs-12 > div.news-img-wrap > a > img `div.col-xs-12 > div.news-img-wrap > a > img`	/public/www/_processed_/3/f/csm_601c7e57ac3f4aeae211dbc58...	111.3 KiB	80.6 KiB
div.row > div.news-img-wrap > a > img `div.row > div.news-img-wrap > a > img`	/public/www/_processed_/5/b/csm_b64f753a2747748008cf52984...	75.9 KiB	64.1 KiB

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.umontreal.ca/	http/1.1
www.umontreal.ca/typo3temp/assets/css/d5f1e4451b.css?1677093387	http/1.1
/typo3temp/udemlessc/lessphp_23fb09adb36716dd87777c76c75b...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/aos-2.1.1/dis...	http/1.1
/typo3temp/udemlessc/lessphp_9477013ded911f281ce354ea476c...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/underscore-1....	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/jquery-3.5.1/...	http/1.1
/typo3conf/ext/udem_news/Resources/Public/JavaScript/udem...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-socia...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-insta...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-galle...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-boots...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/localforage-1...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/slick-1.8.1/s...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/countUp-1.9.2...	http/1.1
/typo3conf/ext/udem_vendor/Resources/Public/aos-2.1.1/dis...	http/1.1
/typo3conf/ext/udem_www/Resources/Public/udem-countup.js?...	http/1.1
/typo3conf/ext/udem_www/Resources/Public/udem_www_main.js...	http/1.1
/typo3conf/ext/udem_social/Resources/Public/udemsocial-in...	http/1.1
www.umontreal.ca/public/www/user_upload/BAN_umontreal-Encore-temps.jpg	http/1.1
www.umontreal.ca/public/www/user_upload/BAN_umontreal-ateliers-culturels.jpg	http/1.1
www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg	http/1.1
www.umontreal.ca/public/www/images/portrait_carre/grande_campagne.png	http/1.1
/public/www/_processed_/3/f/csm_601c7e57ac3f4aeae211dbc58...	http/1.1
/public/www/_processed_/1/7/csm_1805f2619a7b271d3bbd1de20...	http/1.1
/public/www/_processed_/e/0/csm_313e9d577abb14c6eed905c6b...	http/1.1
/public/www/_processed_/5/b/csm_b64f753a2747748008cf52984...	http/1.1
www.umontreal.ca/site.webmanifest	http/1.1
/typo3conf/ext/udem_www/Resources/Public/Images/im_liens-...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	http/1.1
/typo3conf/ext/udem_icons/Resources/Public/fonts/udem-ico...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	http/1.1
/typo3conf/ext/udem_bootstrap/Resources/Public/fonts/Obje...	http/1.1
www.umontreal.ca/alerte/?type=271	http/1.1
www.umontreal.ca/typo3conf/ext/udem_www/Resources/Public/Images/spinner.gif	http/1.1
www.umontreal.ca/favicon-32x32.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

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
/typo3temp/udemlessc/lessphp_9477013ded911f281ce354ea476c...	128.0 KiB	870 ms
/typo3conf/ext/udem_social/Resources/Public/udemsocial-in...	2.2 KiB	111 ms
/typo3conf/ext/udem_www/Resources/Public/udem_www_main.js...	19.6 KiB	220 ms
/typo3conf/ext/udem_vendor/Resources/Public/aos-2.1.1/dis...	4.6 KiB	111 ms
/typo3conf/ext/udem_vendor/Resources/Public/countUp-1.9.2...	2.8 KiB	111 ms
/typo3conf/ext/udem_www/Resources/Public/udem-countup.js?...	3.3 KiB	111 ms
/typo3conf/ext/udem_vendor/Resources/Public/slick-1.8.1/s...	15.1 KiB	220 ms
/typo3conf/ext/udem_vendor/Resources/Public/localforage-1...	9.2 KiB	111 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-insta...	2.2 KiB	111 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-boots...	770 B	111 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-galle...	4.0 KiB	111 ms
/typo3conf/ext/udem_vendor/Resources/Public/jquery-3.5.1/...	30.6 KiB	437 ms
/typo3conf/ext/udem_vendor/Resources/Public/underscore-1....	6.1 KiB	328 ms
/typo3conf/ext/udem_bootstrap/Resources/Public/udem-socia...	1.4 KiB	111 ms
/typo3conf/ext/udem_news/Resources/Public/JavaScript/udem...	804 B	111 ms
/typo3conf/ext/udem_vendor/Resources/Public/aos-2.1.1/dis...	2.6 KiB	328 ms
/typo3temp/udemlessc/lessphp_23fb09adb36716dd87777c76c75b...	1.0 KiB	328 ms
fonts.googleapis.com/css?family=Judson:400,400i,700&subset=latin,latin-ext	624 B	275 ms
/css?family=Open+Sans:400,400italic,300italic,300,600,600...	2.8 KiB	55 ms
www.umontreal.ca/typo3temp/assets/css/d5f1e4451b.css?1677093387	600 B	111 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
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123	3600.0 s	51.0 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: 407 ms

URL	Time Spent
umontreal.ca/	407 ms
www.umontreal.ca/	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

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: 10 ms 114.6 KiB

URL	Transfer Size	Est Savings
/typo3temp/udemlessc/lessphp_9477013ded911f281ce354ea476c...	127.6 KiB	114.6 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: 220 ms 312.6 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-TNZ9KQ9QXF&cx=c&gtm=4e64h1h1	173.5 KiB	71.9 KiB
www.googletagmanager.com/gtag/js?id=G-SGNLEXPKRH&cx=c&gtm=4e64k0h2	160.0 KiB	67.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-59WZNRC	117.0 KiB	63.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-WC3S7D3	127.6 KiB	63.0 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	46.6 KiB

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 10.7 KiB

URL	Transfer Size	Est Savings
/typo3temp/udemlessc/lessphp_9477013ded911f281ce354ea476c...	128.0 KiB	10.7 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 29.3 KiB

URL	Transfer Size	Est Savings
secretariatgeneral.umontreal.ca/udem_consentement_temoins.js?v=021123	50.5 KiB	15.2 KiB
/typo3conf/ext/udem_www/Resources/Public/udem_www_main.js...	19.1 KiB	8.1 KiB
/typo3conf/ext/udem_vendor/Resources/Public/slick-1.8.1/s...	14.7 KiB	5.9 KiB

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.

URL	Transfer Size
www.umontreal.ca/public/www/images/portrait_carre/grande_campagne.png	703.0 KiB
www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg	302.1 KiB
www.umontreal.ca/public/www/user_upload/BAN_umontreal-Encore-temps.jpg	208.9 KiB
www.googletagmanager.com/gtag/js?id=G-TNZ9KQ9QXF&cx=c&gtm=4e64h1h1	173.5 KiB
www.umontreal.ca/public/www/user_upload/BAN_umontreal-ateliers-culturels.jpg	172.1 KiB
www.googletagmanager.com/gtag/js?id=G-SGNLEXPKRH&cx=c&gtm=4e64k0h2	160.0 KiB
/public/www/_processed_/1/7/csm_1805f2619a7b271d3bbd1de20...	131.5 KiB
/typo3temp/udemlessc/lessphp_9477013ded911f281ce354ea476c...	128.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-WC3S7D3	127.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-59WZNRC	117.4 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
Du 6 au 9 mai, c'est l'heure de nous rassembler! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg
Il est encore temps de déposer votre candidature! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-Encore-temps.jpg
De nouveaux ateliers offerts ce printemps `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-ateliers-culturels.jpg
Du 6 au 9 mai, c'est l'heure de nous rassembler! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg
Il est encore temps de déposer votre candidature! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-Encore-temps.jpg
De nouveaux ateliers offerts ce printemps `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-ateliers-culturels.jpg
Du 6 au 9 mai, c'est l'heure de nous rassembler! `div.csc-textpic > div.csc-textpic-imagewrap > figure.csc-textpic-image > img`	www.umontreal.ca/public/www/user_upload/BAN_umontreal-GR.jpg

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

●Max Potential First Input Delay 90 ms

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Optimize viewport for mobile

●User Timing marks and measures 10 user timings

●JavaScript execution time 0.5 s

●Minimizes main-thread work 1.1 s

●Avoid long main-thread tasks 5 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 70 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 70 ms

●Avoid large layout shifts 3 layout shifts found

○INP breakdown

○LCP request discovery

○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.

ARIA

ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
L’UdeM reconnaît l’importance de respecter la vie privée L’utilisation de témo… `div.consent-container > div.modal-backdrop > div > div.modal-container`

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
On sait désormais comment poussent les feuilles des mousses! `div.row > div.col-xs-12 > div.header > h3`
Université de Montréal `div.row > div.col-md-2 > div.hidden-xs > h4.udem-logo-udem-inv`

These are opportunities to improve keyboard navigation in your application.

Names and labels

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.row > div.col-xs-12 > div.news-img-wrap > a `div.row > div.col-xs-12 > div.news-img-wrap > a`
div.article > div.row > div.news-img-wrap > a `div.article > div.row > div.news-img-wrap > a`
div.article > div.row > div.news-img-wrap > a `div.article > div.row > div.news-img-wrap > a`
div.article > div.row > div.news-img-wrap > a `div.article > div.row > div.news-img-wrap > a`
div#c19426 > div.csc-text-text > p.text-center > a `div#c19426 > div.csc-text-text > p.text-center > a`
div#c19426 > div.csc-text-text > p.text-center > a `div#c19426 > div.csc-text-text > p.text-center > a`
`div#c19426 > div.csc-text-text > p.text-center > a`
`div#c19426 > div.csc-text-text > p.text-center > 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.

○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.

●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

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

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

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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[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

○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.

○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.

○Uses ARIA roles only on compatible elements

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

○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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
div > div.udembootstrap_carousel_item > div.content-container > a `div > div.udembootstrap_carousel_item > div.content-container > a`
Paramètres des témoins `div.udem-footer-tail > div#udem_cookie_consent_toggle > div.page > a`

To appear in search results, crawlers need access to your app.

○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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`