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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.

40

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
consent.t-online.de/Notice.8f529.js3600.0 s91.3 KiB
/2026/04/ea565bY6Jr/150x165:131x131/fit-in/200x70/zahn-wa...300.0 s65.9 KiB
www.t-online.de/metatag/live/scg_t-o-home/core.2.55.1.288a0d416f2762929874.js1800.0 s58.6 KiB
www.t-online.de/metatag/live/scg_t-o-home/metaTag.min.js1800.0 s46.2 KiB
consent.t-online.de/unified/wrapperMessagingWithoutDetection.js3600.0 s40.4 KiB
/static/embeds/enga-wortquiz-mobile-companion.c117f033234...86400.0 s80.4 KiB
pur.t-online.de/now.js600.0 s35.0 KiB
/static/embeds/enga-directlinks-games.377367090b5ad5c48cc...86400.0 s79.3 KiB
widgets.engagement-prod.stroeerws.de/static/directlinks/games1/L777.jpeg86400.0 s57.4 KiB
/static/directlinks/games1/Garden_Tales_2_IM.jpg86400.0 s44.7 KiB
/static/directlinks/games1/DAILY_SUDOKU_ICON.jpg86400.0 s37.7 KiB
widgets.engagement-prod.stroeerws.de/static/directlinks/games1/jackpot.jpeg86400.0 s34.5 KiB
/static/directlinks/games1/Kreuzwortraetsel_modern_IM.jpg86400.0 s27.6 KiB
/static/directlinks/games1/Bubble_Shooter_Pro_T-Online_As...86400.0 s21.7 KiB
consent.t-online.de/Notice.30929.css3600.0 s6.7 KiB
consent.t-online.de/polyfills.01516.js3600.0 s2.3 KiB
/static/embeds/enga-wortquiz-mobile-companion.38752ea761d...86400.0 s4.2 KiB
/static/embeds/enga-directlinks-games.e62da273ca9275f8673...86400.0 s3.3 KiB
/static/embeds/runtime.2a14cc3f1f66100b8db1.js86400.0 s1.2 KiB
portal.finanzdaten.t-online.de/finanzen/boerse/api/patrack.js1209600.0 s1.0 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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
www.t-online.de/s/paper/_next/static/media/Roboto-Bold.12893bfc.woff255 ms
/s/paper/_next/static/media/RobotoSerif-SemiBoldItalic.09...55 ms
www.t-online.de/s/paper/_next/static/media/Roboto-Regular.1e2d4d3a.woff245 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: Wolodymyr Selenskyj und Donald Trump: Die Ukraine versucht mit Blick auf ihre V…
path: 1,HTML,1,BODY,2,DIV,3,MAIN,1,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,IMG
selector: div.mr-12 > article.relative > a.transition-colors > img.bg-[url:var(--lqipURL)]
snippet: <img data-tb-thumbnail="true" style="--lqipURL: url('https://images.t-online.de/2026/04/hiNxDtUjUEqg/0x45:4000x2…;" srcset="https://images.t-online.de/2026/04/hiNxDtUjUEqg/0x45:4000x2250/fit-in/646x…" sizes="(min-width:768px) 646px, 100vw" loading="eager" src="https://images.t-online.de/2026/04/hiNxDtUjUEqg/0x45:4000x2250/fit-in/768x…" alt="Wolodymyr Selenskyj und Donald Trump: Die Ukraine versucht mit Blick auf i…" width="4000" height="2250" class="bg-[url:var(--lqipURL)] bg-cover bg-center flex size-full max-w-full" decoding="async">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
GP0SU8JE5 div.[grid-area:image] > div.relative > picture > img.flex
images.t-online.de/2026/04/j5qM1ve0AVvO/313x0:1875x1875/fit-in/180x0/image.jpg23.6 KiB18.3 KiB
Iran-Krieg - Libanon div.[grid-area:image] > div.relative > picture > img.flex
/2026/04/kzijc-04hopU/342x0:1365x1365/fit-in/180x0/die-is...16.3 KiB11.1 KiB
ul.grid > li.leading-0 > span.inline-flex > img ul.grid > li.leading-0 > span.inline-flex > img
/authors/2025/04/kl1AXpgbqfJH/817x68:1305x1305/fit-in/48x...10.1 KiB9.7 KiB
div.[grid-area:image] > div.relative > picture > img.flex div.[grid-area:image] > div.relative > picture > img.flex
images.t-online.de/2026/04/sfvtQVEd1OUX/336x0:1427x1427/fit-in/180x0/image.jpg14.5 KiB9.2 KiB
ul.grid > li.leading-0 > span.inline-flex > img ul.grid > li.leading-0 > span.inline-flex > img
/authors/2023/09/2N-5kt8dDt39/375x0:1469x1469/fit-in/48x0...9.5 KiB9.1 KiB
ul.grid > li.leading-0 > span.inline-flex > img ul.grid > li.leading-0 > span.inline-flex > img
/authors/2025/10/g7XGZx1cLXOt/1174x0:1559x1559/fit-in/80x...9.6 KiB8.5 KiB
ul.grid > li.leading-0 > span.inline-flex > img ul.grid > li.leading-0 > span.inline-flex > img
/authors/2024/01/ndfl3-AGMD9h/435x49:1333x1333/fit-in/80x...9.2 KiB8.1 KiB
Daniel Mützel ul.grid > li.leading-0 > span.inline-flex > img
/authors/2025/04/jk-X4j7-kjTI/322x36:495x495/fit-in/80x0/...8.4 KiB7.3 KiB
CDU-Bundesparteitag div.[grid-area:image] > div.relative > picture > img.flex
/2026/02/tZoSDEZfxUtM/601x131:760x760/fit-in/180x0/bundes...12.2 KiB6.9 KiB
ODDLY-GERMANY/SANTA CLAUS div.[grid-area:image] > div.relative > picture > img.flex
images.t-online.de/2026/04/IbXC0YyqK8LG/342x0:1365x1365/fit-in/180x0/image.jpg11.1 KiB5.8 KiB
Maikäfer div.[grid-area:image] > div.relative > picture > img.flex
/2026/04/fix1nMxYtVpK/325x0:1399x1399/fit-in/180x0/ein-ma...10.8 KiB5.5 KiB
Pete Hegseth bei seiner Rede vor der versammelten US-Militärführung im Pentagon… div.[grid-area:image] > div.relative > picture > img.flex
/2026/01/tYwgyxg0BK3j/858x94:2158x2158/fit-in/180x0/pete-...10.6 KiB5.4 KiB
Matti Hartmann ul.grid > li.leading-0 > span.inline-flex > img
/authors/2023/11/gOI8HVIZZuUJ/366x0:952x952/fit-in/48x0/m...5.7 KiB5.4 KiB
urn:newsml:dpa.com:20090101:260415-911-020536 div.mr-12 > article.relative > a.transition-colors > img.bg-[url:var(--lqipURL)]
/2026/04/YSVKEhsgHyBZ/667x380:985x554/fit-in/150x0/filter...7.2 KiB5.2 KiB
Dmitri Medwedew div.mr-12 > article.relative > a.transition-colors > img.bg-[url:var(--lqipURL)]
/2025/11/urHwqJSo285x/0x107:2048x1152/fit-in/150x0/filter...7.0 KiB5.0 KiB

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 882 ms
URLTime Spent
t-online.de/882 ms
www.t-online.de/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

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.t-online.de/2.3 s262 ms25 ms
consent.t-online.de/Notice.8f529.js1.4 s971 ms36 ms
www.t-online.de/s/paper/_next/static/chunks/framework-936b762db7c591be.js1.3 s1.0 s19 ms
Unattributable696 ms19 ms0.0 ms
www.t-online.de/metatag/live/scg_t-o-home/core.2.55.1.288a0d416f2762929874.js516 ms267 ms21 ms
www.t-online.de/gtm.js?id=GTM-MGD3ZJWL445 ms378 ms58 ms
consent.t-online.de/unified/wrapperMessagingWithoutDetection.js286 ms167 ms13 ms
/gtag/js?id=AW-1014188027&cx=c&gtm=4e64f0&sign=1b50967e9e...276 ms237 ms37 ms
www.t-online.de/s/paper/_next/static/chunks/7393.a6367ab7530e90a9.js273 ms267 ms0.5 ms
www.t-online.de/metatag/live/scg_t-o-home/metaTag.min.js271 ms235 ms23 ms
/embeds/t-fin-stream-landingpage.474fc7502daefdbbae0f.js162 ms146 ms7.6 ms
/static/embeds/enga-wortquiz-mobile-companion.c117f033234...151 ms115 ms23 ms
/embeds/t-sdc-live-now.fbca3b1285f310c6227e.js144 ms128 ms7.4 ms
www.t-online.de/s/paper/_next/static/chunks/pages/section-6da0a60d66837ffc.js115 ms108 ms1.4 ms
www.t-online.de/s/paper/_next/static/chunks/main-8443f1c3740685d1.js105 ms89 ms15 ms
/embeds/t-sdc-results-companion.10a7e9837cd8e54a86a9.js101 ms92 ms8.0 ms
/2026/04/ea565bY6Jr/150x165:131x131/fit-in/200x70/zahn-wa...77 ms47 ms23 ms
/embeds/t-sdc-football-competition-overview.b7ac00307fb89...76 ms71 ms4.4 ms
consent.t-online.de/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js54 ms36 ms18 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 Evaluation4.8 s
Other1.8 s
Style & Layout819 ms
Parse HTML & CSS624 ms
Rendering548 ms
Script Parsing & Compilation423 ms
Garbage Collection44 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 61.1 KiB
URLTransfer SizeEst Savings
/* neuer Layer 07.03.2022 */ /* 2021-12-09 new structure */ /* ROBOTO FONT */ /*! Generated by Fon…52.9 KiB50.1 KiB
*,:after,:before{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-…13.2 KiB11.0 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.

Estimated savings: 0.0 ms 451.8 KiB
URLTransfer SizeEst Savings
/static/embeds/enga-directlinks-games.377367090b5ad5c48cc...78.9 KiB77.3 KiB
/gtag/js?id=AW-1014188027&cx=c&gtm=4e64f0&sign=1b50967e9e...143.9 KiB65.3 KiB
www.t-online.de/gtm.js?id=GTM-MGD3ZJWL176.1 KiB65.2 KiB
/2026/04/ea565bY6Jr/150x165:131x131/fit-in/200x70/zahn-wa...65.5 KiB61.9 KiB
consent.t-online.de/Notice.8f529.js90.9 KiB61.0 KiB
/static/embeds/enga-wortquiz-mobile-companion.c117f033234...80.0 KiB41.5 KiB
/embeds/t-sdc-results-companion.10a7e9837cd8e54a86a9.js37.2 KiB30.8 KiB
www.t-online.de/metatag/live/scg_t-o-home/core.2.55.1.288a0d416f2762929874.js58.0 KiB27.9 KiB
www.t-online.de/s/paper/_next/static/chunks/main-8443f1c3740685d1.js36.7 KiB21.0 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
/static/directlinks/games1/DAILY_SUDOKU_ICON.jpg
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
/static/directlinks/games1/Garden_Tales_2_IM.jpg
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
/static/directlinks/games1/Kreuzwortraetsel_modern_IM.jpg
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
/static/directlinks/games1/Bubble_Shooter_Pro_T-Online_As...
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
widgets.engagement-prod.stroeerws.de/static/directlinks/games1/jackpot.jpeg
div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2 div.style_fullImageContainer__i45og > a > div.style_wrapper__I8Sb8 > img.style_image__pJ4g2
widgets.engagement-prod.stroeerws.de/static/directlinks/games1/L777.jpeg

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

●Layout shift culprits
●Optimize DOM size
●Forced reflow
●LCP breakdown
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 2,319 KiB
●User Timing marks and measures 37 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 2 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 70 ms
●Server Backend Latencies 50 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
79

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Some ARIA child roles must be contained by specific parent roles to properly perform their intended accessibility functions. Learn more about ARIA roles and required parent element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
t-online - Anständig. Informiert. header.sticky > div.grid > h1.flex > a.transition-colors
Menü Icon div#__next > header.sticky > div.grid > a.transition-colors
t-online - Anständig. Informiert. div.bg-snow > div.container > div.p-24 > a.transition-colors

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

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.style_competitionChooser__UVd4W > div.style_picker__pdgVZ > div.style_listButtonChooser__dXo5W > button.style_next__51fC5 div.style_competitionChooser__UVd4W > div.style_picker__pdgVZ > div.style_listButtonChooser__dXo5W > button.style_next__51fC5

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Bubble Shooter Pro (Quelle: GameDistribution) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a
Daily Sudoku (Quelle: Coolgames) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a
Garden Tales 2 (Quelle: GameDistribution) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a
Lounge 777 (Quelle: Whow Games) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a
Kreuzworträtsel (Quelle: Krupion) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a
Jackpot (Quelle: Whow Games) div.style_innerWrapper__mVOKn > div.style_imagesContainer__U99lh > div.style_fullImageContainer__i45og > a

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Alle div.flex > div.md:hidden > a.transition-colors > span.font-bold
30' a > div.style_match__EgPgv > div.style_center__PcEh8 > span.style_minute__JcqDG
Von article.relative > div.grid > div.text-12 > span
Ellen Ivits article.relative > div.grid > div.text-12 > span.font-bold
Philipp Michaelis article.relative > div.grid > div.text-12 > span.font-bold
Von article.relative > div.grid > div.text-12 > span
Matti Hartmann article.relative > div.grid > div.text-12 > span.font-bold
Leon Pollok article.relative > div.grid > div.text-12 > span.font-bold
Von article.relative > div.grid > div.text-12 > span
C. Siemer article.relative > div.grid > div.text-12 > span.font-bold
N. Breuer article.relative > div.grid > div.text-12 > span.font-bold
T. Walter article.relative > div.grid > div.text-12 > span.font-bold
div.grid > div.grid > div.text-12 > span div.grid > div.grid > div.text-12 > span
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
article.relative > div.grid > div.text-12 > span article.relative > div.grid > div.text-12 > span
Autor Name article.relative > div.grid > div.text-12 > span.font-bold
article.relative > div.grid > div.text-12 > span article.relative > div.grid > div.text-12 > span
Autor Name article.relative > div.grid > div.text-12 > span.font-bold
a.card_card__DFzCG > div.style_content__fmDg4 > div.style_text__P_5yd > span.style_performance__MrERA a.card_card__DFzCG > div.style_content__fmDg4 > div.style_text__P_5yd > span.style_performance__MrERA
div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg
div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg
div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg div.style_topFlop__zSIvm > div.style_column__2e8OE > div.style_withCurrency__LMFhw > span.style_performanceLabel__vuAZg
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
Autor Name div.grid > div.grid > div.text-12 > span.font-bold
article.relative > div.grid > div.text-12 > span article.relative > div.grid > div.text-12 > span
article.relative > div.grid > div.text-12 > span article.relative > div.grid > div.text-12 > span
Autor Name article.relative > div.grid > div.text-12 > span.font-bold

These are opportunities to improve the legibility of your content.

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
Sie bereiten sich auf den schlimmsten Fall vor a.transition-colors > div.relative > div.rounded-t-8 > h3.pt-8

These are opportunities to improve keyboard navigation in your application.

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
article.relative > div.grid > h3.text-18 > a.transition-colors article.relative > div.grid > h3.text-18 > a.transition-colors

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
STADT EINSTELLEN div.relative > div.grid > div.md:w-[202px] > button.whitespace-nowrap
Mehr anzeigen div > div.flex > div.w-fit > button.whitespace-nowrap
○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
●Image elements have `[alt]` attributes
●`[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
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Image elements do not have `[alt]` attributes that are redundant text.
●Identical links have the same purpose.
○`[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.
○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
○`<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
○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.
○`[lang]` attributes have a valid value
○`<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
○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.

URLMap URL
www.t-online.de/gtm.js?id=GTM-MGD3ZJWL
www.t-online.de/metatag/live/scg_t-o-home/metaTag.min.jswww.t-online.de/metatag/live/scg_t-o-home/metaTag.min.js.map
www.t-online.de/metatag/live/scg_t-o-home/core.2.55.1.288a0d416f2762929874.js/metatag/live/scg_t-o-home/core.2.55.1.288a0d416f27629298...
●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
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Mitigate clickjacking with XFO or CSP
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.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Suche div#__next > header.sticky > div.grid > a.transition-colors
Vorherige div.px-0 > div.relative > div.z-teaser-hero-slider-navigation > a.transition-colors
Nächste div.px-0 > div.relative > div.z-teaser-hero-slider-navigation > a.transition-colors
Vorherige Artikelauswahl section.flex > div.w-full > div.group > a.transition-colors
Nächste Artikelauswahl section.flex > div.w-full > div.group > a.transition-colors
Vorherige div.w-full > div.flex > div.grid > a.transition-colors
Nächste div.w-full > div.flex > div.grid > a.transition-colors

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

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

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