C — https://www.sncf-connect.com

Site Health

Score: 72 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

No <main> landmark found

Accessibility › Landmark Structure

Cookie '__cf_bm' has no SameSite attribute

Security › Cookie Security

Cookie 'datadome' is missing the HttpOnly flag

Security › Cookie Security

Cookie 'x-correlationid' is missing the HttpOnly flag

Security › Cookie Security

Cookie 'x-nav-session-id' is missing the HttpOnly flag

Security › Cookie Security

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.sncf-connect.com)](https://beavercheck.com/results/03d55a56-f8af-2cb7-cc98-5367288aa4bf)

HTML

<a href="https://beavercheck.com/results/03d55a56-f8af-2cb7-cc98-5367288aa4bf"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.sncf-connect.com" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fwww.sncf-connect.com

This badge auto-updates with your latest scan result.

Was this report useful?

Thanks for your feedback!

Press ? for shortcuts

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

100

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.91 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

11.47 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

836 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.090

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

5.94 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

11.47 s

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.

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

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	300.0 s	303.8 KiB
www.datadoghq-browser-agent.com/eu1/v6/datadog-rum.js	14400.0 s	58.3 KiB
dd.sncf-connect.com/tags.js	3600.0 s	42.7 KiB
/0586d340-3ead-4a60-9722-29faa78e91a6/loader.js?target=ww...	7200.0 s	40.4 KiB
tags.tiqcdn.com/utag/e-voyageurs-sncf/s2s/prod/utag.js	300.0 s	18.2 KiB

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.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:16.67 source:map[column:438 line:1 type:source-location url:https://www.sncf-connect.com/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM.js?scope=footer&delta=3&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:17.395 source:map[column:8519 line:1 type:source-location url:https://www.sncf-connect.com/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM.js?scope=footer&delta=3&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:3.75 source:map[column:1740 line:4 type:source-location url:https://www.sncf-connect.com/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM.js?scope=footer&delta=3&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:0.667 source:map[column:616697 line:1 type:source-location url:https://www.sncf-connect.com/widget/web-widgets-v1.0.0.js urlProvider:network]] map[reflowTime:8.874 source:map[type:text value:[unattributed]]] map[reflowTime:0.771 source:map[column:351 line:12 type:source-location url:https://www.sncf-connect.com/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o.js?scope=footer&delta=7&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:0.107 source:map[column:953 line:17 type:source-location url:https://www.sncf-connect.com/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o.js?scope=footer&delta=7&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:4.426 source:map[column:1410 line:17 type:source-location url:https://www.sncf-connect.com/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o.js?scope=footer&delta=7&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:5.147 source:map[column:1550 line:17 type:source-location url:https://www.sncf-connect.com/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o.js?scope=footer&delta=7&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v urlProvider:network]] map[reflowTime:0.136 source:map[column:1607 line:17 type:source-location url:https://www.sncf-connect.com/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o.js?scope=footer&delta=7&language=fr-FR&theme=mercure_sb&include=eJxtkFGOwzAIRC9Ub45kEZs6bglUgFP19kuk_YhX_bHlNzMYADP03PmBxUWXh_3IK9_RvB9AltHxtqOWoZhtXaBOL3LUNCwOhn0yFuADLJkDV9A6S1rTS6WO4lfeSFagiHyoc7sqG6qkiEl8RVeBgNuAhsne3UvYJhFblGPxXqbWdrQtgQamiVtRIZpr2B7GtALzP85QnsFnOFo7Fyd8NjvNPLgfqHaOh6Blu2rvXhv6GfEvmKR1vh1W8iryjMUsf3esEO-d6BeuJa6v 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

	URL	Resource Size	Est Savings
div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image `div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image`	www.sncf-connect.com/assets/media/2026-03/img_homepage_1245x700_7.jpg	214.9 KiB	201.7 KiB

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

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

items: [map[duration:105.712 label:Time to first byte subpart:timeToFirstByte] map[duration:389.712 label:Resource load delay subpart:resourceLoadDelay] map[duration:43.057 label:Resource load duration subpart:resourceLoadDuration] map[duration:2107.147 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

path: 1,HTML,1,BODY,9,DIV,1,DIV,1,DIV,1,MAIN,0,SECTION,1,ARTICLE,0,DIV,6,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,IMG

selector: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

snippet: <img class="vsc-hero-slide__image vsc-hero-slide__image--on" alt="" data-image="https://www.sncf-connect.com/assets/media/2026-03/img_homepage_1245x700_7.…" src="https://www.sncf-connect.com/assets/media/2026-03/img_homepage_1245x700_7.…">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

lhId: page-0-IMG

nodeLabel: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

path: 1,HTML,1,BODY,9,DIV,1,DIV,1,DIV,1,MAIN,0,SECTION,1,ARTICLE,0,DIV,6,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,IMG

selector: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

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.

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.

URL	Transfer Size	Duration
www.sncf-connect.com/themes/custom/mercure_sb/dist/css/main.css?tcih7w	18.1 KiB
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	303.8 KiB	1.6 s
/themes/custom/mercure_sb/dist/vendors/js/ad-common.js?tc...	2.8 KiB
/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o...	9.7 KiB
/themes/custom/mercure_sb/dist/js/00-base/global/widget-c...	285 B
/themes/custom/mercure_sb/dist/js/00-base/global/widget-l...	530 B
/assets/css/css_YHiGtGZQTqaC4RJQTspHRwZn0RaQv3Akw2GQpqqZ2...	11.4 KiB	150 ms
/assets/asset_injector/js/op_festivals_ete-5d4e072bc1616b...	426 B
/assets/css/css_dpUxZ_bsAD54VdB6-a-JQ8AJAXH_pEFj8WoGrsoEq...	46.0 KiB	150 ms
/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM...	6.3 KiB
/assets/js/js_OtrwUn2Wj7lZGEluUT2DDpO2CTITGPeHNbv6FTPUAZA...	7.8 KiB
/assets/css/css_cwy7vZiZyn4AG9dyEGu-4SnJ1NW2F63W41JpRLHnD...	1.2 KiB	150 ms
/assets/js/js_Zp0AWycn6jvnEUkHjUeCKEtXrHRBw-ZAhDXBzkjzqB0...	663 B
/assets/js/js_u1AZ9v72ME4UB-mH-zEleVwcdODBjfaT3bLBMsuHs60...	2.0 KiB

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

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

TTI

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.

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.

Estimated savings: 150 ms 28.7 KiB

URL	Transfer Size	Est Savings
	20.7 KiB	16.2 KiB
www.sncf-connect.com/themes/custom/mercure_sb/dist/css/main.css?tcih7w	17.8 KiB	12.5 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.

Estimated savings: 1.9 s 364.3 KiB

URL	Transfer Size	Est Savings
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	303.6 KiB	154.1 KiB
/pagead/managed/js/gpt/m202604020101/pubads_impl.js	182.6 KiB	130.0 KiB
www.datadoghq-browser-agent.com/eu1/v6/datadog-rum.js	57.9 KiB	46.3 KiB
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	89.3 KiB	34.0 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.

URL	Total CPU Time	Script Evaluation	Script Parse
Unattributable	841 ms	158 ms	0.0 ms
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	728 ms	531 ms	140 ms
dd.sncf-connect.com/tags.js	363 ms	323 ms	9.7 ms
/pagead/managed/js/gpt/m202604020101/pubads_impl.js	305 ms	236 ms	50 ms
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	194 ms	164 ms	29 ms
/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM...	161 ms	16 ms	1.5 ms
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/ui-w...	156 ms	77 ms	20 ms
www.sncf-connect.com/	151 ms	39 ms	6.5 ms
www.sncf-connect.com/sdk/sdk-v1.10.0.js	126 ms	104 ms	16 ms
www.sncf-connect.com/widget/024759151b7cf920e852.web-widgets-v1.0.0-chunk.js	97 ms	53 ms	28 ms
/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o...	86 ms	24 ms	2.6 ms
tags.tiqcdn.com/utag/e-voyageurs-sncf/s2s/prod/utag.js	72 ms	63 ms	6.6 ms
securepubads.g.doubleclick.net/tag/js/gpt.js	65 ms	55 ms	8.8 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

Category	Time Spent
Script Evaluation	1.9 s
Other	611 ms
Script Parsing & Compilation	354 ms
Style & Layout	309 ms
Garbage Collection	214 ms
Parse HTML & CSS	55 ms
Rendering	27 ms

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

	URL
SNCF Connect coeur et mains `div.didomi-popup-container > div.didomi-popup-view > div.didomi-popup-notice-logo-container > img.didomi-popup-notice-logo`	www.sncf-connect.com/didomi-popin-handshake.svg
Télécharger dans l'app store (nouvel onglet) `div.vsc-push-store__content > div.vsc-push-store__links > a.vsc-button > img`	www.sncf-connect.com/#
Disponible sur google play (nouvel onglet) `div.vsc-push-store__content > div.vsc-push-store__links > a.vsc-button > img`	www.sncf-connect.com/#
Apple Pay `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
CB `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Visa `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Mastercard `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
American Express `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Paypal `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
ANCV `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Alma `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Allianz Travel `ul.vsc-footer__list > li > a.vsc-footer__link > img`	www.sncf-connect.com/#
Railteam (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-footer__link > img`	www.sncf-connect.com/#
Télécharger dans l'app store (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-button > img`	www.sncf-connect.com/#
Disponible sur google play (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-button > img`	www.sncf-connect.com/#

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,683 KiB

●User Timing marks and measures 3 user timings

●Avoid long main-thread tasks 14 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

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

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

100

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.

○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]` 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

●Input buttons have discernible text.

●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 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

●Touch targets have sufficient size and spacing.

●`[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

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○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 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.

○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.

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.

URL	Map URL
www.sncf-connect.com/widget/web-widgets-v1.0.0.js
www.sncf-connect.com/sdk/sdk-v1.10.0.js	www.sncf-connect.com/sdk/sdk-v1.10.0.js.map

●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

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

722 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.11 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

129 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.102

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

986 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.11 s

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.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	300.0 s	303.9 KiB
www.datadoghq-browser-agent.com/eu1/v6/datadog-rum.js	14400.0 s	58.3 KiB
dd.sncf-connect.com/tags.js	3600.0 s	42.7 KiB
/0586d340-3ead-4a60-9722-29faa78e91a6/loader.js?target=ww...	7200.0 s	40.4 KiB
tags.tiqcdn.com/utag/e-voyageurs-sncf/s2s/prod/utag.js	300.0 s	18.2 KiB

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.

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:0.101698] map[node:map[boundingRect:map[bottom:779 height:618 left:0 right:1350 top:161 width:1350] lhId:page-6-DIV nodeLabel:Continuer sans accepter → Votre vie privée est notre priorité Avec votre accor… path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV selector:div#didomi-host > div.notranslate > div#didomi-popup > div.didomi-exterior-border snippet:<div class="didomi-exterior-border didomi-popup__exterior-border"> type:node] score:0.09648 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:358 height:165 left:405 right:945 top:193 width:541] lhId:page-9-IMG nodeLabel:SNCF Connect coeur et mains path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,1,DIV,0,IMG selector:div.didomi-popup-container > div.didomi-popup-view > div.didomi-popup-notice-logo-container > img.didomi-popup-notice-logo snippet:<img class="didomi-popup-notice-logo" alt="SNCF Connect coeur et mains" src="https://www.sncf-connect.com/didomi-popin-handshake.svg" role="heading" aria-level="1"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:204 height:76 left:169 right:1181 top:128 width:1011] lhId:page-1-DIV nodeLabel:Recherchez une destination, un trajet, un numéro de train... path:1,HTML,1,BODY,9,DIV,1,DIV,1,DIV,1,MAIN,0,SECTION,1,ARTICLE,0,DIV,2,DIV,0,DIV selector:article.node > div.vsc__node-content > div#universal-search > div.vsc-universal-search__heading snippet:<div class="vsc-universal-search__heading vsc-universal-search__heading--desktop"> type:node] score:0.005218]]

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

	URL	Resource Size	Est Savings
div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image `div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image`	www.sncf-connect.com/assets/media/2026-03/img_homepage_1245x700_7.jpg	214.9 KiB	154.5 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

lhId: page-0-IMG

nodeLabel: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

path: 1,HTML,1,BODY,9,DIV,1,DIV,1,DIV,1,MAIN,0,SECTION,1,ARTICLE,0,DIV,6,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,IMG

selector: div#vsc-slide_1 > div.vsc-hero-slide__wrapper > div.vsc-hero-slide__image-wrapper > img.vsc-hero-slide__image

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.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

URL	Transfer Size	Duration
/themes/custom/mercure_sb/dist/js/00-base/global/widget-l...	459 B
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	303.9 KiB
/assets/js/js_u1AZ9v72ME4UB-mH-zEleVwcdODBjfaT3bLBMsuHs60...	2.0 KiB
/assets/js/js_OtrwUn2Wj7lZGEluUT2DDpO2CTITGPeHNbv6FTPUAZA...	7.8 KiB
www.sncf-connect.com/themes/custom/mercure_sb/dist/css/main.css?tcih7w	17.9 KiB
/assets/asset_injector/js/op_festivals_ete-5d4e072bc1616b...	511 B
/assets/js/js_hh3IOHrfXEGTLVkkuLgwMLwoBTx_6XjxOSDEjynXq9o...	9.7 KiB
/assets/js/js_GPvrhW60mafr0YU742BMfwPu569xjJXhcNVbwO6YHTM...	6.3 KiB
/themes/custom/mercure_sb/dist/js/00-base/global/widget-c...	273 B
/themes/custom/mercure_sb/dist/vendors/js/ad-common.js?tc...	2.8 KiB
/assets/css/css_YHiGtGZQTqaC4RJQTspHRwZn0RaQv3Akw2GQpqqZ2...	11.4 KiB
/assets/css/css_dpUxZ_bsAD54VdB6-a-JQ8AJAXH_pEFj8WoGrsoEq...	46.0 KiB	80 ms
/assets/css/css_cwy7vZiZyn4AG9dyEGu-4SnJ1NW2F63W41JpRLHnD...	1.2 KiB
/assets/js/js_Zp0AWycn6jvnEUkHjUeCKEtXrHRBw-ZAhDXBzkjzqB0...	661 B

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

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.

Estimated savings: 240 ms 362.5 KiB

URL	Transfer Size	Est Savings
www.sncf-connect.com/widget/web-widgets-v1.0.0.js	303.7 KiB	154.1 KiB
/pagead/managed/js/gpt/m202604030101/pubads_impl.js?cb=31...	182.6 KiB	128.3 KiB
www.datadoghq-browser-agent.com/eu1/v6/datadog-rum.js	57.9 KiB	46.3 KiB
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	89.3 KiB	33.9 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Estimated savings: 0.0 ms 28.6 KiB

URL	Transfer Size	Est Savings
	20.7 KiB	16.4 KiB
www.sncf-connect.com/themes/custom/mercure_sb/dist/css/main.css?tcih7w	17.8 KiB	12.2 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

	URL
SNCF Connect coeur et mains `div.didomi-popup-container > div.didomi-popup-view > div.didomi-popup-notice-logo-container > img.didomi-popup-notice-logo`	www.sncf-connect.com/didomi-popin-handshake.svg
Télécharger dans l'app store (nouvel onglet) `div.vsc-push-store__content > div.vsc-push-store__links > a.vsc-button > img`	www.sncf-connect.com/#
Disponible sur google play (nouvel onglet) `div.vsc-push-store__content > div.vsc-push-store__links > a.vsc-button > img`	www.sncf-connect.com/#
div#block5_store > div.vsc-push-store__wrapper > div.vsc-push-store__image > img `div#block5_store > div.vsc-push-store__wrapper > div.vsc-push-store__image > img`
Apple Pay `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
CB `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Visa `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Mastercard `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
American Express `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Paypal `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
ANCV `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Alma `div#block-mercure-sb-vsc-payment-methods > ul.vsc-footer__list > li > img`	www.sncf-connect.com/#
Allianz Travel `ul.vsc-footer__list > li > a.vsc-footer__link > img`	www.sncf-connect.com/#
Railteam (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-footer__link > img`	www.sncf-connect.com/#
Télécharger dans l'app store (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-button > img`	www.sncf-connect.com/#
Disponible sur google play (nouvel onglet) `ul.vsc-footer__list > li > a.vsc-button > img`	www.sncf-connect.com/#

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

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

Element	Layout shift score
Continuer sans accepter → Votre vie privée est notre priorité Avec votre accor… `div#didomi-host > div.notranslate > div#didomi-popup > div.didomi-exterior-border`	0.096
Recherchez une destination, un trajet, un numéro de train... `article.node > div.vsc__node-content > div#universal-search > div.vsc-universal-search__heading`	0.005

●Time to Interactive 2.1 s

●Max Potential First Input Delay 110 ms

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,704 KiB

●User Timing marks and measures 3 user timings

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.2 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 30 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

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

○INP breakdown

○Avoid non-composited animations

Accessibility

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Failing Elements
Train `ul.vsc-scroller__wrapper > li.vsc-scroller__item > a.vsc-button-link > span`
Taxi/VTC `ul.vsc-scroller__wrapper > li.vsc-scroller__item > a.vsc-button-link > span`

These are opportunities to improve the legibility of your content.

○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]` 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

●Input buttons have discernible text.

●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

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●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

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○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 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.

○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.

100

Best Practices

General

URL	Map URL
www.sncf-connect.com/widget/web-widgets-v1.0.0.js
www.sncf-connect.com/sdk/sdk-v1.10.0.js	www.sncf-connect.com/sdk/sdk-v1.10.0.js.map

●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

100

SEO

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Browse & Analyze

Learn

Results for https://www.sncf-connect.com

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Best Practices

General

SEO

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Contrast

Best Practices

General

SEO

Keyboard Shortcuts