Skip to content
https://rts.ch

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

78

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
SuisseTourisme lance une campagne pour sensibiliser les visiteurs étrangers à n… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/ucfriu-29214095.image?w=640&h=10241.1 MiB1.1 MiB
Patrouille des Glaciers: l'année des femmes. div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/nuiatw-29214923.image?w=640&h=1024807.5 KiB790.4 KiB
Est-ce qu'on va réussir à partir en vacances cet été face au risque de pénurie … div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/48ubop-29215046.image?w=640&h=1024706.9 KiB689.8 KiB
Iman-Naomi.png div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/lc5qsj-29212165.image?w=640&h=1024657.9 KiB640.8 KiB
1-2.png div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/akbps9-29213187.image?w=640&h=1024599.5 KiB582.5 KiB
Un banc rouge contre les violences faites aux femmes a été inauguré à Carouge l… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/m37ina-29213890.image?w=640&h=1024224.2 KiB207.2 KiB
707301740_highres.jpg [KEYSTONE - JON SUPER] div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/q9pnlt-29217444.image?w=640&h=1024113.4 KiB96.4 KiB
707612881_highres_.jpg div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/1b6pyx-29214257.image?w=640&h=102490.2 KiB75.8 KiB
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/medias/2026/image/fi2vtv-29219872.image?w=1280&h=720101.6 KiB62.7 KiB
En Ouganda, la "guerre civile" des chimpanzés nous éclaire sur l'origine de nos… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/fc85gj-29213911.image?w=640&h=102472.2 KiB60.6 KiB
Nyon conserve son titre de fort belle manière. [KEYSTONE - JEAN-CHRISTOPHE BOTT] div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/rk42m0-29219961.image?w=640&h=36068.4 KiB54.9 KiB
Les Simpson div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:347036?w=640&h=36063.9 KiB54.8 KiB
Trump prolonge unilatéralement le cessez-le-feu au Moyen-Orient a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/beus4m-29219325.image?w=640&h=36048.4 KiB42.4 KiB
"Je n'ai aucun doute qu'Instagram a contribué à tuer ma fille." div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/tqd1mi-29211947.image?w=640&h=102447.9 KiB40.3 KiB
Les années passent, mais Julien Sprunger (no86) reste décisif pour ses couleurs… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/44b7kk-29219967.image?w=640&h=36052.9 KiB39.4 KiB
Pont de Chippis classé, l'humain plutôt que la vieille pierre a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/5rrtkz-29218658.image?w=640&h=36045.1 KiB39.1 KiB
La joie des Nyonnaises au moment de poser devant le trophée. [Keystone - Jean-C… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/4h174c-29219947.image?w=640&h=36050.8 KiB37.3 KiB
Le parlement de la ville de Budapest. [TTstudio] div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/info/culture/2026/image/u3bnkf-29219318.image?w=640&h=36046.5 KiB32.2 KiB
Le conseil fédéral en séance extra-muros à Estavayer-le-Lac a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/vqhfs8-29219871.image?w=640&h=36037.1 KiB31.2 KiB
4 candidats pour succéder à Antonio Guterres à la tête de l'ONU a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/2vwqk-29219328.image?w=640&h=36036.6 KiB30.8 KiB
L'invitée de La Matinale (vidéo) - Mitra Sohrabi, avocate et présidente de l'as… a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/y4ido5-29217859.image?w=640&h=36034.3 KiB28.8 KiB
Régulation des banques d'importance systémique: analyse de Pierre Nebel a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/seoj2i-29219867.image?w=640&h=36030.7 KiB25.8 KiB
Temps présent div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:1945574?w=640&h=36033.7 KiB25.5 KiB
Baisser la voix a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/mndkxq-29216308.image?w=640&h=36027.3 KiB22.9 KiB
L'invité de La Matinale (vidéo) - Eric Bonvin, directeur général de l'Hôpital d… a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/a1kmkq-29218993.image?w=640&h=36025.8 KiB21.7 KiB
Le remboursement des taxes américaines devrait commencer ce lundi a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/gn7kfu-29217086.image?w=640&h=36024.4 KiB20.5 KiB
Pascal Jaussi, fondateur de la société S3 photographié en mars 2013. [Keystone … div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2018/image/wbcvmv-26001716.image?w=640&h=36031.4 KiB20.1 KiB
Swiss Space Systems: le procès de Pascal Jaussi va bientôt s'ouvrir à Fribourg a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item
img.rts.ch/medias/2026/image/h6dc37-29219877.image?w=640&h=36022.5 KiB18.9 KiB
Romain Loeffel s'est exprimé sur l'affaire Fischer. [Claudio De Capitani/freshf… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/9829t-29219368.image?w=640&h=36027.4 KiB16.9 KiB
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/medias/2026/image/4sckbu-29216935.image?w=640&h=36027.0 KiB16.6 KiB
"Siffler contre le vent", un spectacle présenté dans le cadre de la 14e édition… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/info/culture/spectacles/2026/image/4ir9f-29219343.image?w=640&h=36017.2 KiB15.4 KiB
Paul Seixas a une nouvelle fois démontré tout son potentiel. [Keystone - Geert … div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2026/image/8g49pt-29219624.image?w=320&h=18017.8 KiB8.4 KiB
La vie dans la lagune d’Ancanacubi, P.gambensis et Ploceus sp. dans le Parc nat… div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
img.rts.ch/articles/2025/image/h7bz3-28942839.image?w=320&h=18014.9 KiB5.5 KiB

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
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

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: 482 ms
URLTime Spent
rts.ch/482 ms
www.rts.ch/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

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 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: 40 ms 43.0 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.

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
●Forced reflow
●LCP breakdown
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.3 s
●Minimizes main-thread work 0.9 s
●Avoid long main-thread tasks 2 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 90 ms
●Server Backend Latencies 590 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
○INP breakdown
○User Timing marks and measures
○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.

Navigation

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Protéger son audition, c'est préserver son cerveau a.rts-card > div.card-caption > div.card-body > h4.card-title
"Budapest", le labyrinthe urbanistico-littéraire de Nina Yargekov a.rts-card > div.card-caption > div.card-body > h4.card-title
Affaire Fischer: "On était tous sous le choc", confie Romain Loeffel a.rts-card > div.card-caption > div.card-body > h4.card-title
Les Gardiennes a.rts-card > div.card-caption > div.card-body > h4.card-title
Le Perchoir en direct a.rts-card > div.card-caption > div.card-body > h4.card-title

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●`[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
●Touch targets have sufficient size and spacing.
●`[lang]` attributes have a valid value
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[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 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 buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○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.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
92

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

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item

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
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

Send Feedback