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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

63

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
/images/news/2026-05-09-betze-comic-233-ehre-wem-ehre-geb...14400.0 s577.8 KiB
/images/fotogalerien/2210/fck-spieler-verabschiedung-2026...14400.0 s401.8 KiB
/images/fotogalerien/2207/1-fc-kaiserslautern-arminia-bie...14400.0 s401.8 KiB
www.der-betze-brennt.de/images/news/2026-05-08-fck-dsc-choreo.jpg14400.0 s356.1 KiB
cdn.vlyby.com/qad/prebid.js1800.0 s217.0 KiB
www.der-betze-brennt.de/images/artikel/3961/foto.jpg14400.0 s246.3 KiB
cperf.sportplatz-media.com/derbetzebrennt/Relaunch/der-betze-brennt.de_Home.js0.0 ms155.5 KiB
/images/fotogalerien/2209/fck-ehrung-dfb-pokal-sieger-199...14400.0 s210.4 KiB
cdn.vlyby.com/qad/qad-outer2.js1800.0 s114.3 KiB
/BKfzuLjOMBdYxzEWRd-U-Wc-6Ho/gpt_and_prebid/config.js1100.0 s64.7 KiB
cdn.consentmanager.net/delivery/js/cmp_en.min.js86400.0 s101.4 KiB
/delivery/customdata/bV8xLndfMjk0Nzgucl9HRFBSLmxfZW4uZF8x...3600.0 s27.1 KiB
www.der-betze-brennt.de/images/aktuell/1000-transfer-ticker-thumbnail.jpg14400.0 s30.5 KiB
www.der-betze-brennt.de/images/system/footer/bester-fussball-blog-2021-png24.png14400.0 s23.9 KiB
www.der-betze-brennt.de/images/news/thumbnails/2026-05-10-spielszene-scp-svd.jpg14400.0 s20.7 KiB
www.der-betze-brennt.de/logo.png14400.0 s16.9 KiB
www.der-betze-brennt.de/inc/fonts/oswald-v56-latin-700.woff214400.0 s12.7 KiB
www.der-betze-brennt.de/inc/fonts/titillium-web-v18-latin-700.woff214400.0 s11.9 KiB
/cdn-cgi/challenge-platform/h/g/scripts/jsd/fe6331af5207/...14400.0 s10.3 KiB
www.der-betze-brennt.de/images/system/footer/fritz-walter.png14400.0 s9.9 KiB
www.der-betze-brennt.de/css/style.css?v=20260506-214400.0 s4.6 KiB
www.der-betze-brennt.de/images/system/header/icon-user-logout.png14400.0 s3.0 KiB
www.der-betze-brennt.de/images/system/header/icon-menu.png14400.0 s2.9 KiB
www.der-betze-brennt.de/images/system/header/icon-search.png14400.0 s2.9 KiB
www.der-betze-brennt.de/images/system/footer/icon-gameday-small.png14400.0 s2.7 KiB
www.der-betze-brennt.de/images/system/footer/icon-search-small.png14400.0 s2.6 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-instagram.png14400.0 s2.5 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-x.png14400.0 s2.3 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-threads.png14400.0 s2.3 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-bluesky.png14400.0 s2.1 KiB
www.der-betze-brennt.de/css/tables.css?v=20260506-214400.0 s2.0 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-youtube.png14400.0 s2.0 KiB
www.der-betze-brennt.de/images/system/footer/icon-social-media-facebook.png14400.0 s1.8 KiB
www.der-betze-brennt.de/images/system/content/icon-comments.png14400.0 s1.8 KiB
www.der-betze-brennt.de/images/system/footer/icon-board-small.png14400.0 s1.6 KiB
www.der-betze-brennt.de/images/system/footer/icon-news-small.png14400.0 s1.4 KiB
www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/rot.png14400.0 s1.4 KiB
www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/gruen.png14400.0 s1.3 KiB
www.der-betze-brennt.de/css/mobile.css?v=2025071514400.0 s1.2 KiB
www.der-betze-brennt.de/css/news-overview.css?v=1110202514400.0 s943 B
www.der-betze-brennt.de/css/print.css?v=2025071514400.0 s723 B
www.der-betze-brennt.de/inc/scripts/overlay-menu.js14400.0 s702 B
/?vid=QAD&et=113&uid=7.1.38&pid=tl7g7HSI3o9KLVjPaZmTw5&pl...0.0 ms178 B
/?vid=QAD&et=17&uid=7.1.38&pid=tl7g7HSI3o9KLVjPaZmTw5&pl=...0.0 ms177 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.188897] map[node:map[boundingRect:map[bottom:1869 height:851 left:175 right:1175 top:1019 width:1000] lhId:page-10-ARTICLE nodeLabel:Betze-Comic Betzi & Die Betze-Buben #233: "Ehre, wem Ehre gebührt" 320 Kommen… path:1,HTML,1,BODY,19,MAIN,7,ARTICLE selector:body > main > article.large snippet:<article class="large"> type:node] score:0.183681 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:459 height:169 left:180 right:480 top:290 width:300] lhId:page-8-IMG nodeLabel:Titelfoto des Artikels path:1,HTML,1,BODY,19,MAIN,2,ARTICLE,1,DIV,0,DIV,0,A,0,IMG selector:div.article-small > div.article-small-image > a > img snippet:<img src="/images/news/thumbnails/2026-05-10-spielszene-scp-svd.jpg" alt="Titelfoto des Artikels" loading="lazy" width="300" height="175"> type:node]] map[cause:Web font extra:map[type:url value:https://www.der-betze-brennt.de/inc/fonts/titillium-web-v18-latin-700.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:91 height:46 left:563 right:1043 top:45 width:479] lhId:page-9-DIV nodeLabel:NEUES VOM BETZE SPIELTAGE DISKUSSIONEN path:1,HTML,1,BODY,6,HEADER,0,DIV,4,DIV selector:body > header > div#headline > div.main-nav-menu snippet:<div class="main-nav-menu"> type:node] score:0.005216 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.der-betze-brennt.de/inc/fonts/oswald-v56-latin-700.woff2]]] type:subitems]]]
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:0.112354] map[node:map[boundingRect:map[bottom:1869 height:851 left:175 right:1175 top:1019 width:1000] lhId:page-10-ARTICLE nodeLabel:Betze-Comic Betzi & Die Betze-Buben #233: "Ehre, wem Ehre gebührt" 320 Kommen… path:1,HTML,1,BODY,19,MAIN,7,ARTICLE selector:body > main > article.large snippet:<article class="large"> type:node] score:0.112354 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:640 height:41 left:1130 right:1330 top:599 width:200] lhId:page-15-IMG nodeLabel:Logo path:1,HTML,1,BODY,1,DIV,1,DIV,0,A,0,IMG selector:div#cmpbox > div.cmplogo > a > img.cmpdl snippet:<img class="cmpdl" alt="Logo" aria-hidden="true" data-cmp-ab="1" src="https://cdn.consentmanager.net/delivery/img/logo1622924165x6795.gif" loading="lazy"> type:node]]] type:subitems]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:43.769 source:map[type:text value:[unattributed]]]]

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
Titelfoto des Artikels article.large > p > a > img
/images/news/2026-05-09-betze-comic-233-ehre-wem-ehre-geb...576.9 KiB506.2 KiB
Titelfoto des Artikels div.article-small > div.article-small-image > a > img
/images/fotogalerien/2210/fck-spieler-verabschiedung-2026...401.0 KiB391.2 KiB
Titelfoto des Artikels main > article.large > a > img
/images/fotogalerien/2207/1-fc-kaiserslautern-arminia-bie...401.0 KiB292.5 KiB
Titelfoto des Artikels main > article.large > a > img
www.der-betze-brennt.de/images/news/2026-05-08-fck-dsc-choreo.jpg355.4 KiB270.3 KiB
Titelfoto des Artikels div.article-small > div.article-small-image > a > img
/images/fotogalerien/2209/fck-ehrung-dfb-pokal-sieger-199...209.9 KiB201.5 KiB
Titelfoto des Artikels main > article.large > a > img
www.der-betze-brennt.de/images/artikel/3961/foto.jpg245.7 KiB160.8 KiB
Titelfoto des Artikels div.article-small > div.article-small-image > a > img
www.der-betze-brennt.de/images/aktuell/1000-transfer-ticker-thumbnail.jpg30.1 KiB22.5 KiB
Logo: Der Betze brennt div#headline > div.main-nav-logo > a > img
www.der-betze-brennt.de/logo.png16.6 KiB16.0 KiB
Titelfoto des Artikels div.article-small > div.article-small-image > a > img
www.der-betze-brennt.de/images/news/thumbnails/2026-05-10-spielszene-scp-svd.jpg20.3 KiB12.0 KiB

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: Titelfoto des Artikels
path: 1,HTML,1,BODY,19,MAIN,7,ARTICLE,1,P,0,A,0,IMG
selector: article.large > p > a > img
snippet: <img src="/images/news/2026-05-09-betze-comic-233-ehre-wem-ehre-gebuehrt.jpg" alt="Titelfoto des Artikels" loading="lazy" width="700">

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Betze-Comic Betzi & Die Betze-Buben #233: "Ehre, wem Ehre gebührt" 320 Kommen… body > main > article.large
0.184
Betze-Comic Betzi & Die Betze-Buben #233: "Ehre, wem Ehre gebührt" 320 Kommen… body > main > article.large
0.112
NEUES VOM BETZE SPIELTAGE DISKUSSIONEN body > header > div#headline > div.main-nav-menu
0.005

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused 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.

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 19.1 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
Titelfoto des Artikels article.large > p > a > img
/images/news/2026-05-09-betze-comic-233-ehre-wem-ehre-geb...
Logo: Der Betze brennt div#headline > div.main-nav-logo > a > img
www.der-betze-brennt.de/logo.png
Logo: Deutschlands bester Fußball-Blog 2021 div.footline-flexbox-column > p > a > img
www.der-betze-brennt.de/images/system/footer/bester-fussball-blog-2021-png24.png
Seite durchsuchen div#headline > div.main-nav-search > a > img
www.der-betze-brennt.de/images/system/header/icon-search.png
Nicht eingeloggt div#headline > div.main-nav-login > a > img
www.der-betze-brennt.de/images/system/header/icon-user-logout.png
Komplettes Menü anzeigen div#headline > div.main-nav-fullmenu > a > img
www.der-betze-brennt.de/images/system/header/icon-menu.png
Der Betze brennt ist dem Andenken an den größten deutschen Fußballspieler aller… div.footline-flexbox-column > p > a > img
www.der-betze-brennt.de/images/system/footer/fritz-walter.png
Facebook footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-facebook.png
Instagram footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-instagram.png
Bluesky footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-bluesky.png
X footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-x.png
Threads footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-threads.png
YouTube footer > div#footline-copyright > a > img
www.der-betze-brennt.de/images/system/footer/icon-social-media-youtube.png
Logo div#cmpbox > div.cmplogo > a > img.cmpdl
cdn.consentmanager.net/delivery/img/logo1622924165x6795.gif

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

●Document request latency
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Reduce unused CSS
●Minimizes main-thread work 1.9 s
●Avoid long main-thread tasks 7 long tasks found
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 20 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 120 ms
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
88

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
Die Lage der Liga body > main > article.small > h3
Betze-Comic body > main > article.large > h3
Taktik-Nachlese zum Spiel FCK-DSC body > main > article.large > h3
Transfer-Ticker body > main > article.small > h3
Blick in die Kurve body > main > article.large > h3
Fotos body > main > article.small > h3
Interaktiv body > main > article.large > h3
Fotos body > main > article.small > h3
Fotos body > main > article.large > h3
Stimmen zum Spiel body > main > article.large > h3
Neues vom Betzenberg body > main > article.small > h3
Ergebnismeldung body > main > article.large > h3
Transfer-Ticker body > main > article.small > h3
Vorbericht: 1. FC Kaiserslautern - Arminia Bielefeld body > main > article.small > h3
Im Blickpunkt: Vorstellung des neuen FCK-Geschäftsführers Marc Strauß body > main > article.large > h3
Neues vom Betzenberg body > main > article.large > h3
Fotos body > main > article.small > h3
Neues vom Betzenberg body > main > article.large > h3
Pressekonferenz body > main > article.large > h3
Neues vom Betzenberg body > main > article.large > h3
Neues vom Betzenberg body > main > article.small > h3
Im Blickpunkt body > main > article.large > h3
Neues vom Betzenberg body > main > article.small > h3
Neues vom Betzenberg body > main > article.small > h3
Transfer-Ticker body > main > article.small > h3
Gegner-Check body > main > article.small > h3

These are opportunities to improve keyboard navigation in your application.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
531 third parties div#cmpboxcontent > div.cmpboxtxtdiv > div.cmpboxtxt > a.cmplink

These are opportunities to improve the legibility of your content.

Names and labels

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
main > article.large > p > a main > article.large > p > a
main > article.large > p > a main > article.large > p > 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.

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
Transfer-Ticker main > details.news-overview > summary.news-overview > a.tag
#FCKDSC main > details.news-overview > summary.news-overview > a.tag
U21 main > details.news-overview > summary.news-overview > a.tag
Zuschauer main > details.news-overview > summary.news-overview > a.tag
Strauß main > details.news-overview > summary.news-overview > a.tag
Keßler main > details.news-overview > summary.news-overview > a.tag
TV-Geld main > details.news-overview > summary.news-overview > a.tag
Team-Status main > details.news-overview > summary.news-overview > a.tag
Stimmungsbarometer main > details.news-overview > summary.news-overview > a.tag
Aktuell div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Saison div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Verein div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Historie div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Stadion div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Fans div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a
Interaktiv div#footline-flexbox > div.footline-flexbox-column > p.footline-flexbox-column-menu > a

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` 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.
●`[accesskey]` values are unique
●`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
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●`[lang]` attributes have a valid value
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○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
○Buttons have an accessible name
○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.
○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.
81

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS
●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
●Page has valid source maps
○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.

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
Seite durchsuchen header > div#headline > div.main-nav-search > a
Nicht eingeloggt header > div#headline > div.main-nav-login > a
Komplettes Menü anzeigen header > div#headline > div.main-nav-fullmenu > a

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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