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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

30

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.

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.

RequestCache TTLTransfer Size
/0ad08901-fea3-47ac-9ee9-757368300b5d/loader.js?target_ty...7200.0 s42.2 KiB
www.radiofrance.fr/pikapi/images/7a0395e9-b5b9-4484-9951-31a3c121fed7/1280x7202591953.0 s190.6 KiB
www.radiofrance.fr/pikapi/images/8f4fbd22-4519-4dc7-a1b3-28cd7e72b6f4/1280x7202591953.0 s138.0 KiB
s.go-mpulse.net/boomerang/WEG5J-NEMNG-DBMMB-XH7VN-GNXVV604800.0 s59.3 KiB
www.radiofrance.fr/pikapi/images/20fe22a8-0dd2-42e5-aa1c-9c6eed2b8efd/1280x7202591648.0 s58.6 KiB
www.radiofrance.fr/pikapi/images/82d63d39-c5fc-418f-8519-26b7beb0cd63/560x3152588568.0 s55.1 KiB
www.radiofrance.fr/pikapi/images/cabb9701-d2d9-4ea3-8a60-b8e792a06e4b/420x7202591999.0 s54.0 KiB
www.radiofrance.fr/pikapi/images/c9ddc1b5-d16d-4c5b-b70e-17fcce70adb9/420x7202591999.0 s49.8 KiB
www.radiofrance.fr/pikapi/images/8bd24d79-f031-4cbc-881a-d566b3592ca9/420x7202589768.0 s48.9 KiB
www.radiofrance.fr/pikapi/images/62c8760b-e613-4d79-93da-a43808116313/420x7202591026.0 s48.0 KiB
www.radiofrance.fr/pikapi/images/556ad891-4bf7-4bef-ac19-956a42272f5a/280x4802591999.0 s41.5 KiB
www.radiofrance.fr/pikapi/images/4a3a12f8-9559-4cba-bd05-5c7181e5ff36/1280x6802589021.0 s40.7 KiB
www.radiofrance.fr/pikapi/images/c7f00db8-95c1-4b8c-bc79-a73b9d4d21ed/280x4802591248.0 s38.9 KiB
www.radiofrance.fr/pikapi/images/effcf877-2a8f-4533-996e-b2ed1461e0ea/420x7202591999.0 s38.4 KiB
www.radiofrance.fr/pikapi/images/e01bb16b-24c5-45c6-b94b-e7f29e6708b5/280x4802591999.0 s33.8 KiB
www.radiofrance.fr/pikapi/images/fa4c5dad-5778-4cf7-bc0a-ce9cd4a60fe6/560x3152591047.0 s32.2 KiB
www.radiofrance.fr/pikapi/images/76c2034b-515a-4b1f-83ba-dfbee2c81975/280x4802590395.0 s28.0 KiB
www.radiofrance.fr/pikapi/images/f63b6bbe-d9cf-4a38-bed3-c755bb550aa7/280x4802590676.0 s27.8 KiB
www.radiofrance.fr/pikapi/images/6c630942-4431-4cc0-9e25-f169b1b51d48/280x4802587542.0 s27.8 KiB
www.radiofrance.fr/pikapi/images/fb771c5d-78ed-47ee-9286-0c8f3bd63e69/560x3152591451.0 s27.3 KiB
www.radiofrance.fr/pikapi/images/f5fb3298-342c-415f-ac53-d3b24b5a2b54/420x7202591124.0 s26.8 KiB
www.radiofrance.fr/pikapi/images/25b1411c-b20d-4e3d-89f4-185ab30606ec/1280x6802587065.0 s25.8 KiB
www.radiofrance.fr/pikapi/images/01332714-50f9-44a2-9144-d1b650ab8f72/280x4802583470.0 s25.3 KiB
www.radiofrance.fr/pikapi/images/5d589b9b-3f1f-44ef-a1d5-7c41ea72ede8/560x3152586751.0 s24.8 KiB
www.radiofrance.fr/pikapi/images/2752d973-5841-4daa-a990-f974ce02fadb/280x4802591746.0 s24.4 KiB
www.radiofrance.fr/pikapi/images/ff9cc40f-5421-41b9-ba2a-0a2a20613ca8/280x4802589330.0 s23.9 KiB
www.radiofrance.fr/pikapi/images/f8342fd6-3286-44ba-a984-045cd8ff16a7/280x4802591999.0 s23.4 KiB
www.radiofrance.fr/pikapi/images/41d555e4-f445-4ca9-979c-76c236ee1e78/280x4802591775.0 s23.0 KiB
www.radiofrance.fr/pikapi/images/f22a3c49-2029-417d-8f17-35dcf3a32f58/280x4802590979.0 s22.8 KiB
www.radiofrance.fr/pikapi/images/bd12aef1-7363-4749-b1fd-51cbc73d7feb/280x4802586404.0 s22.8 KiB
www.radiofrance.fr/pikapi/images/97965b65-11b7-4c9d-8a9a-2ea53904f09e/280x4802591999.0 s22.7 KiB
www.radiofrance.fr/pikapi/images/511c4a14-d347-4b98-9e35-6cb26b8be63a/280x4802589330.0 s21.3 KiB
www.radiofrance.fr/pikapi/images/1a820022-6c7e-4f13-82d1-257217ca1b4e/560x3152590956.0 s21.3 KiB
www.radiofrance.fr/pikapi/images/5aab9c37-4567-4083-8cc5-e0e321bb6011/280x4802588981.0 s21.0 KiB
www.radiofrance.fr/pikapi/images/7e685f28-a497-4cdb-bd05-fd7e8c55641f/280x4802591054.0 s20.8 KiB
www.radiofrance.fr/pikapi/images/8214cc77-1033-4562-ba10-3fdcfbd0a829/280x4802589921.0 s20.2 KiB
www.radiofrance.fr/pikapi/images/bb3b9665-2551-4ecf-a049-691514f825c4/420x7202587818.0 s19.5 KiB
www.radiofrance.fr/pikapi/images/99ac8fc4-d599-423a-a31b-af00d953ffaf/560x3152591622.0 s19.3 KiB
www.radiofrance.fr/pikapi/images/ebab5440-d4b0-4d97-88f2-57b3a003617e/280x4802591555.0 s19.2 KiB
www.radiofrance.fr/pikapi/images/d37427d3-74cf-440b-ae61-8958cb0b6ff9/280x4802588259.0 s19.1 KiB
www.radiofrance.fr/pikapi/images/13d11c45-d1f3-4f82-9530-306f7162b774/560x3152591157.0 s18.7 KiB
www.radiofrance.fr/pikapi/images/344de4bd-78fd-473d-9141-aa2f92750549/280x4802591860.0 s18.5 KiB
www.radiofrance.fr/pikapi/images/013f4200-9ab3-4bf7-9e3c-eac35e43a904/280x4802590049.0 s18.3 KiB
www.radiofrance.fr/pikapi/images/ca48fec4-884b-4a99-a805-c5a20f3d5134/560x3152583402.0 s18.2 KiB
www.radiofrance.fr/pikapi/images/f65b76f8-f8b4-4cb7-93f3-0b700d7d3c12/280x4802591746.0 s17.6 KiB
www.radiofrance.fr/pikapi/images/eff12f9e-07ba-40d3-8379-3d7d8ec9e6f7/560x3152591999.0 s17.4 KiB
www.radiofrance.fr/pikapi/images/8ffa1a8d-9130-4bb6-9a7d-679d6001ae0d/420x7202591761.0 s17.0 KiB
www.radiofrance.fr/pikapi/images/0e23d032-d949-42e5-ab9a-ef8ca6c332e8/420x7202583055.0 s16.8 KiB
www.radiofrance.fr/pikapi/images/da13e99f-3cf0-4e55-a156-add8fd3c4480/280x4802584372.0 s15.5 KiB
www.radiofrance.fr/pikapi/images/cc871119-a4d0-4f42-9edf-b3574c67f3fe/280x4802590820.0 s15.4 KiB
www.radiofrance.fr/pikapi/images/958adf71-0b7a-4a6a-916b-950116efb72f/420x7202588863.0 s15.3 KiB
www.radiofrance.fr/pikapi/images/bac6ad7c-533d-4d73-80a9-c26c3daba807/280x4802591995.0 s15.2 KiB
www.radiofrance.fr/pikapi/images/fb9ae8e1-2a04-413a-b03f-f56c2d300970/280x4802579105.0 s14.3 KiB
www.radiofrance.fr/pikapi/images/0d5b7b92-d16a-4fb9-b30b-84b8ace09b65/280x4802590049.0 s13.2 KiB
www.radiofrance.fr/pikapi/images/969d4a3e-3573-4d15-9aac-7e1d0ee10dea/280x4802586707.0 s13.2 KiB
www.radiofrance.fr/pikapi/images/4a3a12f8-9559-4cba-bd05-5c7181e5ff36/560x3152591627.0 s13.1 KiB
www.radiofrance.fr/pikapi/images/88a4c56d-88e3-43d9-94e3-b04c1ee2de79/560x3152588782.0 s12.7 KiB
www.radiofrance.fr/pikapi/images/18072fb6-c204-4658-838f-d2105d56a2b3/280x4802591999.0 s12.1 KiB
www.radiofrance.fr/pikapi/images/880b1260-0d9f-4e05-b84e-3f35d048ee1a/560x3152591006.0 s11.0 KiB
www.radiofrance.fr/pikapi/images/65980cfd-fb43-4e28-aac6-784364779754/560x3152589963.0 s11.0 KiB
www.radiofrance.fr/pikapi/images/d1eae635-b079-43cd-9c43-39c2d2683d80/560x3152586982.0 s5.2 KiB
www.radiofrance.fr/pikapi/images/c6288843-9269-4ca5-ab0e-49454aed8fdc/200x2002591034.0 s3.3 KiB
www.radiofrance.fr/pikapi/images/9cee7dd1-ee0d-4b88-b764-3cf9b748c266/200x2002590102.0 s3.2 KiB
www.radiofrance.fr/pikapi/images/df8d1b79-8823-4421-a694-2b7561430b79/200x2002591672.0 s3.1 KiB
www.radiofrance.fr/pikapi/images/52bb749e-f832-4dd1-ba0a-8c5d11e0aa3a/200x2002591999.0 s2.2 KiB
www.radiofrance.fr/pikapi/images/46b4082c-5e67-427f-b93e-7cc2ab991df1/132x1322591590.0 s2.0 KiB
www.radiofrance.fr/pikapi/images/461c035b-ef42-4264-8058-45f4cc19ef8b/132x1322591962.0 s1.3 KiB

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:105.834 source:map[column:5069 line:1 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/CuarxdrD.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:70.325 source:map[column:8217 line:0 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/cSeAk2sm.js urlProvider:network]] map[reflowTime:27.735 source:map[column:3836 line:0 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/DcTieEVN.js urlProvider:network]] map[reflowTime:2.284 source:map[column:20104 line:25 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/DefGTa7r.js urlProvider:network]] map[reflowTime:1.758 source:map[column:1768 line:0 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/DYClvJEc.js urlProvider:network]] map[reflowTime:1.979 source:map[column:1594 line:0 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/DYClvJEc.js urlProvider:network]] map[reflowTime:1.753 source:map[column:1687 line:0 type:source-location url:https://www.radiofrance.fr/_app/immutable/chunks/DYClvJEc.js urlProvider:network]] map[reflowTime:7.988 source:map[column:162148 line:1 type:source-location url:https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-fr-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js urlProvider:network]] map[reflowTime:59.026 source:map[column:10385 line:1 type:source-location url:https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-fr-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js 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.

URLResource SizeEst Savings
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/images/francebleu/visual.png420.8 KiB418.9 KiB
La Roulette au Casino de Monte-Carlo, 1909, lithographie de Georges Goursat. ©G… div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/7a0395e9-b5b9-4484-9951-31a3c121fed7/1280x720190.2 KiB148.4 KiB
Le glacier de Neko Island, en Antarctique, le 12 février 2026 div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/8f4fbd22-4519-4dc7-a1b3-28cd7e72b6f4/1280x720137.6 KiB95.9 KiB
Un supermarché à Saint-Sebastien-sur-Loire (Loire-Atlantique) en juin 2025 div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/82d63d39-c5fc-418f-8519-26b7beb0cd63/560x31554.7 KiB49.0 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/cabb9701-d2d9-4ea3-8a60-b8e792a06e4b/420x72053.7 KiB44.0 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/c9ddc1b5-d16d-4c5b-b70e-17fcce70adb9/420x72049.5 KiB39.8 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/8bd24d79-f031-4cbc-881a-d566b3592ca9/420x72048.6 KiB39.1 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/62c8760b-e613-4d79-93da-a43808116313/420x72047.7 KiB38.3 KiB
Affaires criminelles - vertical div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/556ad891-4bf7-4bef-ac19-956a42272f5a/280x48041.2 KiB37.1 KiB
Sébastien Lecornu a présenté son plan d'accompagnement face à la hausse des car… div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/4a3a12f8-9559-4cba-bd05-5c7181e5ff36/1280x68040.4 KiB36.2 KiB
Paix, anatomie d'une promesse div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/c7f00db8-95c1-4b8c-bc79-a73b9d4d21ed/280x48038.7 KiB34.5 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/fa4c5dad-5778-4cf7-bc0a-ce9cd4a60fe6/560x31531.9 KiB30.7 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/effcf877-2a8f-4533-996e-b2ed1461e0ea/420x72038.1 KiB30.6 KiB
Affaire Anaïs Guillaume : elle aura 21 ans pour toujours... div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/e01bb16b-24c5-45c6-b94b-e7f29e6708b5/280x48033.5 KiB29.4 KiB
Prince div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/20fe22a8-0dd2-42e5-aa1c-9c6eed2b8efd/1280x72058.3 KiB26.8 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/fb771c5d-78ed-47ee-9286-0c8f3bd63e69/560x31527.0 KiB25.8 KiB
Euphoria, en 5 podcasts div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/76c2034b-515a-4b1f-83ba-dfbee2c81975/280x48027.7 KiB23.6 KiB
Liban, les clés pour comprendre div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/f63b6bbe-d9cf-4a38-bed3-c755bb550aa7/280x48027.6 KiB23.5 KiB
Stieg Larsson (1954-2004), avant Millenium, le militant avant l’écrivain div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/6c630942-4431-4cc0-9e25-f169b1b51d48/280x48027.5 KiB23.3 KiB
Donald Trump à la descente du Air Force One, le 17 avril, à Phoenix en Arizona. div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/25b1411c-b20d-4e3d-89f4-185ab30606ec/1280x68025.4 KiB22.8 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/f5fb3298-342c-415f-ac53-d3b24b5a2b54/420x72026.5 KiB21.3 KiB
Iran : les clefs pour comprendre div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/01332714-50f9-44a2-9144-d1b650ab8f72/280x48025.1 KiB20.9 KiB
La mixtape de Prince div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/2752d973-5841-4daa-a990-f974ce02fadb/280x48024.0 KiB19.9 KiB
Le ministère de l'économie et des finances, à Paris le 21 avril 2025 div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/5d589b9b-3f1f-44ef-a1d5-7c41ea72ede8/560x31524.5 KiB19.6 KiB
Les voies de l'IA les algorithmes de recommandation dans le domaine de la cultu… div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/ff9cc40f-5421-41b9-ba2a-0a2a20613ca8/280x48023.6 KiB19.5 KiB
La Peste fut-elle la plus grande catastrophe du Moyen Age ? Vertical div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/f8342fd6-3286-44ba-a984-045cd8ff16a7/280x48023.1 KiB19.0 KiB
Laurent Garnier div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/41d555e4-f445-4ca9-979c-76c236ee1e78/280x48022.7 KiB18.6 KiB
baye div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/bd12aef1-7363-4749-b1fd-51cbc73d7feb/280x48022.5 KiB18.4 KiB
Boris Cyrulnik div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/f22a3c49-2029-417d-8f17-35dcf3a32f58/280x48022.5 KiB18.4 KiB
Les Visages de l'actu : Musk div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/97965b65-11b7-4c9d-8a9a-2ea53904f09e/280x48022.4 KiB18.3 KiB
C'est tout un art ! div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/511c4a14-d347-4b98-9e35-6cb26b8be63a/280x48021.0 KiB17.1 KiB
La Joconde sort du silence div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/5aab9c37-4567-4083-8cc5-e0e321bb6011/280x48020.7 KiB16.8 KiB
Les drapeaux européen et suédois devant le Palais du Reichstag à Berlin en Alle… div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/1a820022-6c7e-4f13-82d1-257217ca1b4e/560x31521.0 KiB16.8 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/ca48fec4-884b-4a99-a805-c5a20f3d5134/560x31517.9 KiB16.7 KiB
Procès du meurtre d'Agnès Lassalle : son compagnon "attend de pouvoir dire les … div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/7e685f28-a497-4cdb-bd05-fd7e8c55641f/280x48020.5 KiB16.6 KiB
Découvrez bientôt "L'Odyssée du Buhara", le nouveau podcast historique ICI div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/8214cc77-1033-4562-ba10-3fdcfbd0a829/280x48019.9 KiB16.2 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/eff12f9e-07ba-40d3-8379-3d7d8ec9e6f7/560x31517.1 KiB15.9 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/bb3b9665-2551-4ecf-a049-691514f825c4/420x72019.2 KiB15.4 KiB
"Les faits ne seront jamais prescrits dans mon livre", affirme Frédéric Pommier… div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/ebab5440-d4b0-4d97-88f2-57b3a003617e/280x48018.9 KiB15.4 KiB
miquelon div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/d37427d3-74cf-440b-ae61-8958cb0b6ff9/280x48018.8 KiB15.3 KiB
Des policiers à Montbéliard (photo d'illustration) div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/99ac8fc4-d599-423a-a31b-af00d953ffaf/560x31519.0 KiB15.2 KiB
Crise au Moyen-Orient : ce que ça change à nos vies div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/344de4bd-78fd-473d-9141-aa2f92750549/280x48018.2 KiB14.8 KiB
Les bus BlaBlaCar seront bientôt à l'arrêt. div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/13d11c45-d1f3-4f82-9530-306f7162b774/560x31518.4 KiB14.7 KiB
Rodin Vs. Michel Ange ©Radio France div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/013f4200-9ab3-4bf7-9e3c-eac35e43a904/280x48018.0 KiB14.6 KiB
Violences sexistes : l’effacement silencieux des femmes dans les médias div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/f65b76f8-f8b4-4cb7-93f3-0b700d7d3c12/280x48017.3 KiB14.0 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/8ffa1a8d-9130-4bb6-9a7d-679d6001ae0d/420x72016.7 KiB13.5 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/0e23d032-d949-42e5-ab9a-ef8ca6c332e8/420x72016.5 KiB13.3 KiB
Celles qui lisent div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/da13e99f-3cf0-4e55-a156-add8fd3c4480/280x48015.2 KiB12.4 KiB
Chroniques d'une célibataire - Vertical ok div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/cc871119-a4d0-4f42-9edf-b3574c67f3fe/280x48015.1 KiB12.2 KiB
La mer libre et sans blocus : c'était mieux avant, vraiment ? div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/bac6ad7c-533d-4d73-80a9-c26c3daba807/280x48014.9 KiB12.1 KiB
div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
www.radiofrance.fr/pikapi/images/958adf71-0b7a-4a6a-916b-950116efb72f/420x72015.1 KiB12.1 KiB

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:308.633 label:Time to first byte subpart:timeToFirstByte] map[duration:34.184 label:Resource load delay subpart:resourceLoadDelay] map[duration:184.185 label:Resource load duration subpart:resourceLoadDuration] map[duration:1977.259 label:Element render delay subpart:elementRenderDelay]]
lhId: page-2-IMG
nodeLabel: Le glacier de Neko Island, en Antarctique, le 12 février 2026
path: 1,HTML,1,BODY,3,DIV,25,MAIN,7,DIV,0,DIV,4,DIV,3,DIV,0,DIV,0,DIV,3,DIV,2,DIV,2,DIV,0,DIV,0,DIV,6,DIV,1,DIV,0,DIV,2,DIV,1,FIGURE,0,PICTURE,8,IMG
selector: div.ImageRatio > figure.ImageRatio-figure > picture.ImageRatio-picture > img.ImageRatio-img
snippet: <img src="https://www.radiofrance.fr/pikapi/images/8f4fbd22-4519-4dc7-a1b3-28cd7e72b…" alt="Le glacier de Neko Island, en Antarctique, le 12 février 2026" loading="eager" decoding="sync" width="3000" height="1450" fetchpriority="high" data-testid="ImageRatio" class="ImageRatio-img svelte-1s885yz">

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.

URLTransfer SizeDuration
www.radiofrance.fr/_app/immutable/assets/SLIDER_PODCAST_CARRE.BaY3wjov.css383 B
www.radiofrance.fr/_app/immutable/assets/ListMedia.DvFAwMzO.css421 B
www.radiofrance.fr/_app/immutable/assets/Concerts.DQJzhpGs.css496 B
www.radiofrance.fr/_app/immutable/assets/CoverTheme.BkfTwkyx.css386 B
www.radiofrance.fr/_app/immutable/assets/CoverStation.BtB1t8ym.css440 B
www.radiofrance.fr/_app/immutable/assets/CoverHome.V3EsWZZn.css392 B
www.radiofrance.fr/_app/immutable/assets/CoverDossier.CMHUoB3u.css382 B
www.radiofrance.fr/_app/immutable/assets/CoverDefault.DUld1VXL.css374 B
www.radiofrance.fr/_app/immutable/assets/TracksPage.D6DJrzuu.css563 B
www.radiofrance.fr/_app/immutable/assets/Newsletter_chaine.CQG7K9gj.css559 B
www.radiofrance.fr/_app/immutable/assets/ContactPage.0a7J62XO.css471 B
www.radiofrance.fr/_app/immutable/assets/ListSong.D7SmXxXC.css390 B
www.radiofrance.fr/_app/immutable/assets/ConceptPage.DoIEUK8g.css669 B
www.radiofrance.fr/_app/immutable/assets/ArticleLayout.CWkwGQ05.css366 B
www.radiofrance.fr/_app/immutable/assets/CoverTag.9p-pPyvL.css384 B
www.radiofrance.fr/_app/immutable/assets/TagPage.Ia1fWzmg.css399 B
www.radiofrance.fr/_app/immutable/assets/PersonnePage.cdko-Xml.css398 B
www.radiofrance.fr/_app/immutable/assets/CoverDirect.CLgCt-J3.css657 B
www.radiofrance.fr/_app/immutable/assets/Page.DNrGe-QO.css895 B
www.radiofrance.fr/_app/immutable/assets/SearchPage.CZue8ubA.css736 B
www.radiofrance.fr/_app/immutable/assets/MosaicPodcast.CdPTJ_Rb.css435 B
www.radiofrance.fr/_app/immutable/assets/ThemePage.CtYEWz4E.css401 B
www.radiofrance.fr/_app/immutable/assets/ExpressionPage.Cn62TN6B.css642 B
www.radiofrance.fr/_app/immutable/assets/MosaicPerson.IzB2UAB8.css377 B
www.radiofrance.fr/_app/immutable/assets/EventPage.B3AM9maT.css366 B
www.radiofrance.fr/_app/immutable/assets/ConcertPage.lFFrhaGL.css511 B
www.radiofrance.fr/_app/immutable/assets/HeadingSearch.D6acYyZF.css519 B
www.radiofrance.fr/_app/immutable/assets/Parent.DLazLNrc.css483 B
www.radiofrance.fr/_app/immutable/assets/Video.C-y5iJHO.css527 B
www.radiofrance.fr/_app/immutable/assets/ShareCard.psgvRCvJ.css405 B
www.radiofrance.fr/_app/immutable/assets/ListTop.DSNeEoaG.css402 B
www.radiofrance.fr/_app/immutable/assets/BodyRenderer.CUMmAEvS.css1.5 KiB151 ms
www.radiofrance.fr/_app/immutable/assets/AdSlot.C17RjAqu.css771 B
www.radiofrance.fr/_app/immutable/assets/SOLO_PROMOTE.DyEv_UwM.css440 B
www.radiofrance.fr/_app/immutable/assets/SOLO_DIRECT_L.BHIJJe86.css595 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_PODCAST_VERTICAL.VSp4dDV6.css381 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_EPISODE_TOP_ECOUTE.DDhhBhR5.css461 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_DIRECT_M.A0cCliZM.css400 B
www.radiofrance.fr/_app/immutable/assets/MosaicMedia4Col.Blvuefhz.css460 B
www.radiofrance.fr/_app/immutable/assets/MOSAIC_DIRECT.BSeW8wMM.css637 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_PERSONNE.DSwEGl6W.css428 B
www.radiofrance.fr/_app/immutable/assets/Heading.BMeKS8_g.css381 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_VIDEO.DF7CtOwn.css515 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_PROMOTE.CUk6Hgmk.css379 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_PERSONNE_S.BN5zx0wS.css402 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_EPISODE.DmfX1dgc.css459 B
www.radiofrance.fr/_app/immutable/assets/CardSideDirect.DocIcGtL.css353 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_DIRECT.BlXxojad.css513 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_CHAINE.CCNQNmBu.css376 B
www.radiofrance.fr/_app/immutable/assets/SLIDER_A_LA_UNE.CfDiu-JD.css442 B
www.radiofrance.fr/_app/immutable/assets/LocaleModal.BgVnTuZz.css655 B
www.radiofrance.fr/_app/immutable/assets/NEWSLETTER_SUBSCRIPTION.D5V0V3N4.css788 B
www.radiofrance.fr/_app/immutable/assets/AUTOPROMO.C8Lkn3cF.css402 B
www.radiofrance.fr/_app/immutable/assets/30.DArNRBrs.css808 B
www.radiofrance.fr/_app/immutable/assets/PromoteUserAccount.bcmAjk1i.css449 B
www.radiofrance.fr/_app/immutable/assets/ImageModal.CNQnhulU.css921 B
www.radiofrance.fr/_app/immutable/assets/0.D4-RK8I_.css13.8 KiB
www.radiofrance.fr/_app/immutable/assets/VideoManager.HgIe7eD4.css7.7 KiB151 ms
www.radiofrance.fr/_app/immutable/assets/ProgressBar.CC5L_qng.css7.2 KiB
www.radiofrance.fr/_app/immutable/assets/SkipLinks.Dw-VCJEn.css17.8 KiB151 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

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.

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: 1.0 s
URLTime Spent
radiofrance.fr/1.0 s
www.radiofrance.fr/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: 150 ms 26.3 KiB
URLTransfer SizeEst Savings
17.3 KiB14.5 KiB
www.radiofrance.fr/_app/immutable/assets/SkipLinks.Dw-VCJEn.css17.5 KiB11.8 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 600 ms 145.9 KiB
URLTransfer SizeEst Savings
www.radiofrance.fr/_app/immutable/chunks/Ci0K-xwM.js73.0 KiB48.3 KiB
/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk....102.5 KiB46.6 KiB
www.radiofrance.fr/_app/immutable/chunks/DefGTa7r.js44.9 KiB28.6 KiB
s.go-mpulse.net/boomerang/WEG5J-NEMNG-DBMMB-XH7VN-GNXVV59.1 KiB22.4 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
www.radiofrance.fr/_app/immutable/chunks/CuarxdrD.js3.1 s2.3 s0.4 ms
Unattributable2.9 s1.0 s0.0 ms
www.radiofrance.fr/2.6 s154 ms132 ms
s.go-mpulse.net/boomerang/WEG5J-NEMNG-DBMMB-XH7VN-GNXVV576 ms250 ms26 ms
/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-w...423 ms107 ms35 ms
/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk....371 ms322 ms48 ms
www.radiofrance.fr/_app/immutable/chunks/Ci0K-xwM.js259 ms211 ms1.4 ms
www.radiofrance.fr/_app/immutable/chunks/cSeAk2sm.js198 ms4.9 ms0.6 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation4.6 s
Other2.7 s
Style & Layout2.3 s
Rendering444 ms
Parse HTML & CSS369 ms
Garbage Collection355 ms
Script Parsing & Compilation281 ms

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.

URLTransfer Size
www.radiofrance.fr/images/francebleu/visual.png421.3 KiB
www.radiofrance.fr/221.1 KiB
www.radiofrance.fr/pikapi/images/7a0395e9-b5b9-4484-9951-31a3c121fed7/1280x720190.6 KiB
www.radiofrance.fr/pikapi/images/8f4fbd22-4519-4dc7-a1b3-28cd7e72b6f4/1280x720138.0 KiB
/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk....102.9 KiB
www.radiofrance.fr/_app/immutable/chunks/Ci0K-xwM.js73.3 KiB
s.go-mpulse.net/boomerang/WEG5J-NEMNG-DBMMB-XH7VN-GNXVV59.3 KiB
www.radiofrance.fr/pikapi/images/20fe22a8-0dd2-42e5-aa1c-9c6eed2b8efd/1280x72058.6 KiB
/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-w...55.4 KiB
www.radiofrance.fr/pikapi/images/82d63d39-c5fc-418f-8519-26b7beb0cd63/560x31555.1 KiB

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

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 3 user timings
●Avoid long main-thread tasks 20 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 80 ms
●Server Backend Latencies 80 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 50 ms
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
94

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

When a `progressbar` element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to label `progressbar` elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Affaires sensibles visuels div.CardSide > div.CardSide-content > div.image-container > div.CircularProgressBar

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.

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
Les documents franceinfo div#cardtitle-d97cb734-3155-4b81-bbe0-5c85b03d7a5f > div.title-zone > p#subtext-d97cb734-3155-4b81-bbe0-5c85b03d7a5f > a.Link
L'info de France Inter div#cardtitle-960ef33d-485a-4bf4-aefd-6ea2e208b6d9 > div.title-zone > p#subtext-960ef33d-485a-4bf4-aefd-6ea2e208b6d9 > a.Link
franceinfo: Les informés div#cardtitle-b7d695e5-1873-4ee5-94fb-ae4eb3b8392e > div.title-zone > p#subtext-b7d695e5-1873-4ee5-94fb-ae4eb3b8392e > a.Link
L'info de France Inter div#cardtitle-c0224d65-f2cd-4279-992b-3ea839254ce0 > div.title-zone > p#subtext-c0224d65-f2cd-4279-992b-3ea839254ce0 > a.Link
L'info d'ici de 7h30, ici Orléans div#cardtitle-5a4b69b0-19fc-4f72-8c53-ad1647723dcd > div.title-zone > p#subtext-5a4b69b0-19fc-4f72-8c53-ad1647723dcd > a.Link
L'invité d'ici, ICI Bourgogne div#cardtitle-231b6f52-adb5-4036-8891-5ee709df99b2 > div.title-zone > p#subtext-231b6f52-adb5-4036-8891-5ee709df99b2 > a.Link
Le Masque et la Plume div#cardtitle-80931984-bfa7-4684-b9fa-41973485f8b8 > div.title-zone > p#subtext-80931984-bfa7-4684-b9fa-41973485f8b8 > a.Link

These items highlight common accessibility best practices.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Écouter Écouter div.bottom > div.dropzone > div.button-container > button.Button-container
Écouter Écouter div.LeadingAndTrailing > div.side-right > div.Playable > button.Button-container
○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.
●`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
●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
●All heading elements contain content.
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` 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>`.
○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.
96

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/ line 240, col 0
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".
www.radiofrance.fr/_app/immutable/chunks/bOcsx3vP.js line 1, col 3200
Error: <circle> attribute r: Expected length, "-Infinity".

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.

URL
www.radiofrance.fr/
●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 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
○Redirects HTTP traffic to HTTPS
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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