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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

68

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.18659] map[node:map[boundingRect:map[bottom:2705 height:2269 left:75 right:1275 top:436 width:1200] lhId:page-1-DIV nodeLabel:Ouvrages et numéros récemment ajoutés Filtrer par type de publication Cette act… path:1,HTML,1,BODY,5,MAIN,0,DIV,1,DIV selector:body.bg-wild-sand-50 > main#contenu > div > div.max-w-[1200px] snippet:<div class="max-w-[1200px] mx-auto bg-white px-5 pt-12 pb-20 relative overflow-hidden …"> type:node] score:0.152367 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-sans-latin-400-normal-BxeZdXas.woff2]] map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-sans-latin-500-normal-uodOEoAl.woff2]] map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-sans-latin-700-normal-DFYOGfC8.woff2]] map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-latin-700-normal-C2gFIJRo.woff2]] map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-latin-400-normal-GIyuNP-x.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:2705 height:2269 left:75 right:1275 top:436 width:1200] lhId:page-1-DIV nodeLabel:Ouvrages et numéros récemment ajoutés Filtrer par type de publication Cette act… path:1,HTML,1,BODY,5,MAIN,0,DIV,1,DIV selector:body.bg-wild-sand-50 > main#contenu > div > div.max-w-[1200px] snippet:<div class="max-w-[1200px] mx-auto bg-white px-5 pt-12 pb-20 relative overflow-hidden …"> type:node] score:0.034223 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://shs.cairn.info/build/assets/alegreya-sans-latin-300-normal-BzElyEjs.woff2]]] type:subitems]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:33.99 source:map[column:102592 line:2 type:source-location url:https://js.datadome.co/tags.js 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:108.626 source:map[type:text value:[unattributed]]] map[reflowTime:31.542 source:map[column:42 line:10 type:source-location url: urlProvider:network]] map[reflowTime:7.469 source:map[column:8473 line:580 type:source-location url:https://shs.cairn.info/build/assets/app-6XbT_EhG.js urlProvider:network]] map[reflowTime:33.99 source:map[column:78948 line:1 type:source-location url:https://js.datadome.co/tags.js 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: jumbotron background
path: 1,HTML,1,BODY,5,MAIN,0,DIV,0,SECTION,0,IMG
selector: main#contenu > div > section.pt-[70px] > img.object-cover
snippet: <img src="https://shs.cairn.info/build/assets/1366w-DiszWvGj.webp" srcset="https://shs.cairn.info/build/assets/320w-CLXfP6bV.webp 320w,https://shs.ca…" sizes="(max-width: 1024px) 1920px, 100vw" class="object-cover w-full h-full absolute inset-0 -z-20" alt="jumbotron background">

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Couverture de CRNDOSS_233 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_233/cover/thumbnail?lang=fr48.7 KiB40.8 KiB
Couverture de CRNDOSS_234 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_234/cover/thumbnail?lang=fr44.0 KiB35.1 KiB
Couverture de CRNDOSS_229 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_229/cover/thumbnail?lang=fr36.4 KiB28.5 KiB
Couverture de CRNDOSS_220 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_220/cover/thumbnail?lang=fr33.3 KiB24.4 KiB
Couverture de CRNDOSS_227 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_227/cover/thumbnail?lang=fr25.6 KiB18.8 KiB
Couverture de CRNDOSS_225 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_225/cover/thumbnail?lang=fr24.2 KiB15.7 KiB
Logo Cairn.info div.max-w-[1200px] > div.grid > div.text-left > img.w-52
shs.cairn.info/build/assets/cairn-negatif-DhObs80T.png13.3 KiB12.5 KiB
Logo CNL (Centre national du livre) ul.flex > li > a.no-underline > img.w-[100px]
shs.cairn.info/build/assets/logo-cnl-blanc-CisQgL-i.png12.7 KiB12.2 KiB
Couverture de CRNRENC_134 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_134/cover/thumbnail?lang=fr14.4 KiB10.6 KiB
Couverture de CRNRENC_138 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_138/cover/thumbnail?lang=fr13.6 KiB10.0 KiB
Couverture de CRNRENC_139 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_139/cover/thumbnail?lang=fr13.0 KiB9.6 KiB
Couverture de CRNRENC_137 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_137/cover/thumbnail?lang=fr12.5 KiB9.2 KiB
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/AG_767/cover/thumbnail?lang=fr13.5 KiB8.8 KiB
Couverture de CRNRENC_135 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_135/cover/thumbnail?lang=fr11.4 KiB8.4 KiB
Couverture de CRNRENC_136 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_136/cover/thumbnail?lang=fr11.4 KiB8.4 KiB
Couverture de CRNDOSS_230 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_230/cover/thumbnail?lang=fr17.1 KiB8.3 KiB
Couverture de CRNRENC_140 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_140/cover/thumbnail?lang=fr11.2 KiB8.2 KiB
Couverture de CRNRENC_142 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_142/cover/thumbnail?lang=fr10.6 KiB7.8 KiB
Couverture de CRNDOSS_224 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_224/cover/thumbnail?lang=fr11.2 KiB7.2 KiB
Couverture de CRNRENC_141 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNRENC_141/cover/thumbnail?lang=fr9.4 KiB7.0 KiB
Couverture de CRNDOSS_215 li.shrink-0 > div.bg-white > div.rounded-t-xl > img.h-full
shs.cairn.info/numero/CRNDOSS_215/cover/thumbnail?lang=fr13.9 KiB6.3 KiB
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/LUCIE_LESCA_2025_01/cover/thumbnail?lang=fr10.4 KiB5.6 KiB
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/GALL_MORIZ_2026_01/cover/thumbnail?lang=fr9.5 KiB5.4 KiB
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/EMS_FRIMO_2026_01/cover/thumbnail?lang=fr8.2 KiB4.3 KiB
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/EMS_BARTE_2026_01/cover/thumbnail?lang=fr8.0 KiB4.1 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: 937 ms
URLTime Spent
cairn.info/440 ms
www.cairn.info/497 ms
shs.cairn.info/0.0 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 781 ms
URLTime Spent
shs.cairn.info/881 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Ouvrages et numéros récemment ajoutés Filtrer par type de publication Cette act… body.bg-wild-sand-50 > main#contenu > div > div.max-w-[1200px]
0.152
Ouvrages et numéros récemment ajoutés Filtrer par type de publication Cette act… body.bg-wild-sand-50 > main#contenu > div > div.max-w-[1200px]
0.034

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

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: 240 ms 205.5 KiB
URLTransfer SizeEst Savings
shs.cairn.info/build/assets/app-6XbT_EhG.js184.7 KiB122.8 KiB
static.axept.io/sdk.js182.7 KiB82.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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: 0.0 ms 22.4 KiB
URLTransfer SizeEst Savings
shs.cairn.info/build/assets/app-DkNxeAdM.css27.7 KiB22.4 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
Logo CNL (Centre national du livre) ul.flex > li > a.no-underline > img.w-[100px]
shs.cairn.info/build/assets/logo-cnl-blanc-CisQgL-i.png
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/LUCIE_LESCA_2025_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/LDF_COUSI_2026_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/AG_767/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/HERM_FLORE_2026_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/RISO_021/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/EMS_FRIMO_2026_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/EMS_BARTE_2026_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/PERRI_COUST_2025_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/PERRI_SERRA_2025_01/cover/thumbnail?lang=fr
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
shs.cairn.info/numero/GALL_MORIZ_2026_01/cover/thumbnail?lang=fr
Cairn.info, Sciences Humaines et Sociales header.sticky > nav#menu > a.underline > img.h-8
shs.cairn.info/build/assets/shs-fr-CNY2_Yho.svg
Logo CFC (Centre français d'exploitation du droit de copie) ul.flex > li > a.no-underline > img.w-[150px]
shs.cairn.info/build/assets/logo-cfc-blanc-DOCc7xNh.png
Logo Cairn.info div.max-w-[1200px] > div.grid > div.text-left > img.w-52
shs.cairn.info/build/assets/cairn-negatif-DhObs80T.png
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border
div.bg-white > div > div.mb-2 > img.border div.bg-white > div > div.mb-2 > img.border

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

Time to Interactive 2.4 s
Optimize DOM size
Font display
LCP breakdown
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Minify CSS
Minify JavaScript
Avoids enormous network payloads Total size was 1,213 KiB
JavaScript execution time 0.4 s
Minimizes main-thread work 1.0 s
Avoid long main-thread tasks 2 long tasks found
Network Requests
Network Round Trip Times 80 ms
Server Backend Latencies 100 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
INP breakdown
User Timing marks and measures
Avoid non-composited animations
84

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

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
sciences humaines et sociales div.relative > div.choices > div.choices__inner > div.choices__list
Filtrer div.sort-select-container > div.choices > div.choices__inner > div.choices__list

Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Aller à la diapositive 1 div > ul.flex > li > button#tab-0
Aller à la diapositive 1 div > ul.flex > li > button#tab-0
Aller à la diapositive 1 div > ul.flex > li > button#tab-0
Aller à la diapositive 1 div > ul.flex > li > button#tab-0

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.h-48 > div > div.flex > button div.h-48 > div > div.flex > button

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Ajouter à la liste de lecture div.flex > div.relative > div > button.group
Hélène Romano div.px-3 > ul.font-serif > li.inline-block > a.underline
Camille Schmoll div.px-3 > ul.font-serif > li.inline-block > a.underline
Gérard Hirigoyen div.px-3 > ul.font-serif > li.inline-block > a.underline
Christophe Darmangeat div.px-3 > ul.font-serif > li.inline-block > a.underline
Sibylle Gollac div.px-3 > ul.font-serif > li.inline-block > a.underline
Michelle Bergadaà div.px-3 > ul.font-serif > li.inline-block > a.underline
Didier Houzel div.px-3 > ul.font-serif > li.inline-block > a.underline
Christine Dugoin-Clément div.px-3 > ul.font-serif > li.inline-block > a.underline
Bénédicte Savoy div.px-3 > ul.font-serif > li.inline-block > a.underline
Jean-Michel Saussois div.px-3 > ul.font-serif > li.inline-block > a.underline
Olivier Favereau div.px-3 > ul.font-serif > li.inline-block > a.underline
Fabien Joly div.px-3 > ul.font-serif > li.inline-block > a.underline
Stéphanie Dameron div.px-3 > ul.font-serif > li.inline-block > a.underline
Jean-Claude Dupuis div.px-3 > ul.font-serif > li.inline-block > a.underline
Michel Kalika div.px-3 > ul.font-serif > li.inline-block > a.underline
Yves Citton div.px-3 > ul.font-serif > li.inline-block > a.underline
Thierry Terret div.px-3 > ul.font-serif > li.inline-block > a.underline
Gérald Naro div.px-3 > ul.font-serif > li.inline-block > a.underline
Dominique Desjeux div.px-3 > ul.font-serif > li.inline-block > a.underline
Évelyne Chauvet div.px-3 > ul.font-serif > li.inline-block > a.underline
Sylvain Rotillon div.mt-auto > ul.font-serif > li.inline-block > a.underline
Christophe Darmangeat div.mt-auto > ul.font-serif > li.inline-block > a.underline
Mélissa Boï div.mt-auto > ul.font-serif > li.inline-block > a.underline
Clémence Jost div.mt-auto > ul.font-serif > li.inline-block > a.underline
Mélissa Boï div.mt-auto > ul.font-serif > li.inline-block > a.underline
Kevin Hiridjee div.mt-auto > ul.font-serif > li.inline-block > a.underline
Guillermo Paniagua Farel div.mt-auto > ul.font-serif > li.inline-block > a.underline
Mélissa Boï div.mt-auto > ul.font-serif > li.inline-block > a.underline
Olivier Postel-Vinay div.mt-auto > ul.font-serif > li.inline-block > a.underline
Richard Dubois div.mt-auto > ul.font-serif > li.inline-block > a.underline
Julie Gaucher div.mt-auto > ul.font-serif > li.inline-block > a.underline
Mélissa Boï div.mt-auto > ul.font-serif > li.inline-block > a.underline
Guillermo Paniagua Farel div.mt-auto > ul.font-serif > li.inline-block > a.underline
Guillermo Paniagua Farel div.mt-auto > ul.font-serif > li.inline-block > a.underline
Conditions d’utilisation div.max-w-[1200px] > ul.flex > li > a.underline
Conditions de vente div.max-w-[1200px] > ul.flex > li > a.underline
Politique de confidentialité div.max-w-[1200px] > ul.flex > li > a.underline
Gestion des cookies div.max-w-[1200px] > ul.flex > li > a.underline

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-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s have all required `[aria-*]` attributes
`[role]`s are contained by their required parent element
`[role]` values are valid
`[aria-*]` attributes are valid and not misspelled
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
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
`[aria-hidden="true"]` elements do not contain focusable descendents
Elements use only permitted ARIA attributes
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Links are distinguishable without relying on color.
Links have a discernible name
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
No element has a `[tabindex]` value greater than 0
`[lang]` attributes have a valid value
Heading elements appear in a sequentially-descending order
Document has a main landmark.
Deprecated ARIA roles were not used
ARIA IDs are unique
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
No form fields have multiple labels
`<frame>` or `<iframe>` elements have a title
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Skip links are focusable.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
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

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
Redirects HTTP traffic to HTTPS
Mitigate clickjacking with XFO or CSP
91

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.

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
Image elements have `[alt]` attributes
Document has a valid `hreflang`
robots.txt is valid
Document has a valid `rel=canonical`

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