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· 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.

95

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
www1.wdr.de/nachrichten/neuerungen-website-app-wdr-100~_v-bannerhochl.png777.0 s523.3 KiB
/nrw/ostwestfalen-lippe/kebab-streit-bielefeld-krispy-kfc...1238.0 s234.1 KiB
exporte.wdr.de/player/current/v-6.9.4/ardplayer-wdr.js?t=20564839.0 s206.7 KiB
/nachrichten/westfalen-lippe/ahaus-castor-106~_v-premiumR...3478.0 s209.3 KiB
www1.wdr.de/assets-v5.174.4/fonts/TheSansC5s-7_Bold.woff2125.0 s114.3 KiB
www1.wdr.de/assets-v5.174.4/fonts/TheSansC5s-6_SemiBold.woff2125.0 s114.0 KiB
www1.wdr.de/assets-v5.174.4/fonts/TheSansC5s-5_Plain.woff2125.0 s113.5 KiB
www1.wdr.de/assets-v5.174.4/fonts/feather-icons.woff2125.0 s45.0 KiB
/nachrichten/rheinland/koeln-urteil-abschleppkosten-nrw-1...453.0 s41.3 KiB
www1.wdr.de/nachrichten/krankenwagen-tuerkei-100~_v-gseapremiumxl.jpg3600.0 s48.0 KiB
/verbraucher/mobilitaet/bahnhoefe-nrw-sauberkeit-106~_v-T...1703.0 s42.8 KiB
www1.wdr.de/nachrichten/armin-laschet-e-scooter-100~_v-TeaserAufmacher.jpg3478.0 s44.3 KiB
/nachrichten/wirtschaft/deutsche-telekom-unternehmen-100~...477.0 s34.9 KiB
/nachrichten/regionalnachrichten/aachen/geldhaufen-bankno...3600.0 s37.2 KiB
www1.wdr.de/assets/js/Header-B7vevfZP.js124.0 s28.8 KiB
exporte.wdr.de/player/current/v-6.9.4/ardplayer-wdr.css?t=20564900.0 s30.2 KiB
/politik/politik-in-nrw/afd-sontowski-bezirksbuergermeist...3600.0 s33.3 KiB
/nachrichten/westfalen-lippe/paderborn-hospiz-spatenstich...1238.0 s29.5 KiB
www1.wdr.de/js-ama-lib-all100.js?c=20564424.0 s27.4 KiB
www1.wdr.de/nachrichten/scheunenmord-104~_v-gseaclassicxl.jpg1238.0 s26.4 KiB
/nachrichten/westfalen-lippe/kino-OWL-mama-lern-deutsch-c...3600.0 s28.3 KiB
/nrw/dortmund/ukraine-delegation-klinikum-dortmund-op100~...3600.0 s24.7 KiB
www1.wdr.de/nachrichten/flugzeug-startet-100~_v-gseaclassicxl.jpg1238.0 s22.3 KiB
www1.wdr.de/global-font-fix100.css1542.0 s8.5 KiB
www1.wdr.de/iframeresizer102.js1423.0 s6.3 KiB
www1.wdr.de/js-data-proxy100.js?c=20564900.0 s5.5 KiB
www1.wdr.de/assets/js/external/smartbanner.min.js537.0 s4.1 KiB
exporte.wdr.de/player/current/res/css/plainPlayer.min.css839.0 s3.9 KiB
www1.wdr.de/assets/img/icons/footer/AppleAppStore.svg2312.0 s3.8 KiB
exporte.wdr.de/player/current/res/css/ardPlayerStyle-v6.x.min.css?t=20564900.0 s2.5 KiB
exporte.wdr.de/player/current/res/css/relatedContent.min.css839.0 s2.4 KiB
www1.wdr.de/assets/img/icons/header/icon-audiothek.svg3107.0 s2.6 KiB
www1.wdr.de/assets/img/icons/footer/GoogleAppStore.svg1537.0 s2.3 KiB
www1.wdr.de/searchFormBugFix100.js1423.0 s1.8 KiB
www1.wdr.de/assets/img/wdr_logo_inv.svg1537.0 s1.4 KiB
www1.wdr.de/assets/img/icons/header/icon-weather.svg1542.0 s1.4 KiB
www1.wdr.de/assets/img/wdr_logo.svg2314.0 s1.4 KiB
www1.wdr.de/assets/css/merged_smartbanner.css772.0 s1.3 KiB
www1.wdr.de/assets/img/icons/header/icon-traffic.svg3107.0 s978 B
www1.wdr.de/assets/js/Base-BouCSPYx.js1022.0 s881 B
www1.wdr.de/assets/img/icons/icon-whatsapp.svg396.0 s822 B
www1.wdr.de/kw-2025-teaser-css-fix-100.css1693.0 s824 B
www1.wdr.de/assets/js/LeadTeaser-BRvY2S9Z.js778.0 s704 B
www1.wdr.de/assets/img/icons/icon-tiktok.svg396.0 s597 B
www1.wdr.de/tickerteaserwdrcss-100.css3478.0 s657 B
www1.wdr.de/assets/js/componentUtils-KlVBH2Cv.js536.0 s548 B
www1.wdr.de/assets/img/icons/icon-youtube.svg1538.0 s556 B
www1.wdr.de/audiomodul-filter-fix100.css1542.0 s542 B
www1.wdr.de/js-sites-cfg100.js?c=20564900.0 s523 B
www1.wdr.de/lightbox-fix-css-100.css3478.0 s514 B
www1.wdr.de/wahlembed-fix100.js1423.0 s457 B
www1.wdr.de/assets/img/icons/icon-facebook.svg952.0 s435 B
www1.wdr.de/assets/img/icons/header/icon-mediathek.svg3107.0 s472 B
www1.wdr.de/assets/img/icons/icon-instagram.svg952.0 s432 B
www1.wdr.de/resizer-kw-25-dimap-iframe100.js3018.0 s448 B
www1.wdr.de/broadcast_preview100.css1424.0 s391 B
www1.wdr.de/bugfix-floating100.css1542.0 s322 B
www1.wdr.de/podcast-button_fix_100.css1542.0 s301 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:21.476 source:map[type:text value:[unattributed]]] map[reflowTime:13.929 source:map[column:12547 line:19 type:source-location url:https://www1.wdr.de/assets-v5.174.4/js/Header-B7vevfZP.js urlProvider:network]] map[reflowTime:6.594 source:map[column:4821 line:23 type:source-location url:https://www1.wdr.de/assets-v5.174.4/js/Header-B7vevfZP.js urlProvider:network]]]

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: Dutzende Menschen harren auch bei Einbruch der Dunkelheit noch vor dem Zwischen…
path: 1,HTML,1,BODY,2,MAIN,0,DIV,3,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,4,A,0,PICTURE,5,IMG
selector: div.media > a.mediaLink > picture > img.img
snippet: <img src="https://www1.wdr.de/nachrichten/westfalen-lippe/ahaus-castor-106~_v-premiu…" alt="Dutzende Menschen harren auch bei Einbruch der Dunkelheit noch vor dem Zwi…" width="395" loading="lazy" class="img" height="296">

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
value: No additional origins are good candidates for preconnecting

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
www1.wdr.de/assets-v5.174.4/fonts/feather-icons.woff215 ms

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
Die neue WDR-Website auf einem Laptop und die neue WDR-App auf einem Smartphone div.mediaCon > div.media > picture > img.img
www1.wdr.de/nachrichten/neuerungen-website-app-wdr-100~_v-bannerhochl.png522.8 KiB474.8 KiB
KFC Filliale mit Werbebanner für einen "Krispy Kebab" div.media > a.mediaLink > picture > img.img
/nrw/ostwestfalen-lippe/kebab-streit-bielefeld-krispy-kfc...233.8 KiB226.1 KiB
Dutzende Menschen harren auch bei Einbruch der Dunkelheit noch vor dem Zwischen… div.media > a.mediaLink > picture > img.img
/nachrichten/westfalen-lippe/ahaus-castor-106~_v-premiumR...209.1 KiB146.2 KiB
Armin Laschet fährt auf einem e-Scooter div.media > a.mediaLink > picture > img.img
www1.wdr.de/nachrichten/armin-laschet-e-scooter-100~_v-TeaserAufmacher.jpg44.2 KiB29.7 KiB
Verschiedene Euroscheine liegen übereinander div.media > a.mediaLink > picture > img.img
/nachrichten/regionalnachrichten/aachen/geldhaufen-bankno...37.0 KiB29.2 KiB
Unterführung mit Farbschmierereien div.media > a.mediaLink > picture > img.img
/verbraucher/mobilitaet/bahnhoefe-nrw-sauberkeit-106~_v-T...42.6 KiB28.1 KiB
Ein Auto wird abgeschleppt div.media > a.mediaLink > picture > img.img
/nachrichten/rheinland/koeln-urteil-abschleppkosten-nrw-1...41.1 KiB26.6 KiB
Wird AfD-Bezirksbürgermeister Sontowski abgewählt? div.media > a.mediaLink > picture > img.img
/politik/politik-in-nrw/afd-sontowski-bezirksbuergermeist...33.2 KiB25.4 KiB
KI Modell für Hospiz div.media > a.mediaLink > picture > img.img
/nachrichten/westfalen-lippe/paderborn-hospiz-spatenstich...29.3 KiB21.6 KiB
Mann mit Kamera div.media > a.mediaLink > picture > img.img
/nachrichten/westfalen-lippe/kino-OWL-mama-lern-deutsch-c...28.1 KiB20.4 KiB
Amts- und Landgericht in Paderborn div.media > a.mediaLink > picture > img.img
www1.wdr.de/nachrichten/scheunenmord-104~_v-gseaclassicxl.jpg26.2 KiB18.5 KiB
Blick durch eine Tür zusehen ist ein Operationstisch div.media > a.mediaLink > picture > img.img
/nrw/dortmund/ukraine-delegation-klinikum-dortmund-op100~...24.5 KiB16.7 KiB
Flugzeug startet am Flughafen Stuttgart div.media > a.mediaLink > picture > img.img
www1.wdr.de/nachrichten/flugzeug-startet-100~_v-gseaclassicxl.jpg22.2 KiB6.2 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www1.wdr.de/broadcast_preview100.css391 B
www1.wdr.de/podcast-button_fix_100.css301 B
www1.wdr.de/audiomodul-filter-fix100.css542 B
www1.wdr.de/global-font-fix100.css8.5 KiB
www1.wdr.de/kw-2025-teaser-css-fix-100.css824 B
www1.wdr.de/bugfix-floating100.css322 B
www1.wdr.de/tickerteaserwdrcss-100.css657 B
www1.wdr.de/lightbox-fix-css-100.css514 B
www1.wdr.de/assets/css/merged_smartbanner.css1.3 KiB

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

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: 80 ms 113.7 KiB
URLTransfer SizeEst Savings
www1.wdr.de/assets-v5.174.4/css/merged_print.css55.6 KiB55.6 KiB
exporte.wdr.de/player/current/v-6.9.4/ardplayer-wdr.css?t=2056429.7 KiB29.7 KiB
www1.wdr.de/assets-v5.174.4/css/main.css35.8 KiB28.5 KiB

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 31.2 KiB
URLTransfer SizeEst Savings
www1.wdr.de/assets-v5.174.4/js/external/jquery-3.7.1.min.js37.7 KiB15.6 KiB
www1.wdr.de/assets-v5.174.4/js/external/jquery-3.7.1.min.js37.7 KiB15.6 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 216.9 KiB
URLTransfer SizeEst Savings
exporte.wdr.de/player/current/v-6.9.4/ardplayer-wdr.js?t=20564206.2 KiB163.1 KiB
www1.wdr.de/assets-v5.174.4/js/external/jquery-3.7.1.min.js37.7 KiB29.2 KiB
www1.wdr.de/assets-v5.174.4/js/external/jquery-3.7.1.min.js37.7 KiB24.6 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
Im Google Play Store herunterladen div.content > div.storeButtons > a.storeButton > img
www1.wdr.de/assets/img/icons/footer/GoogleAppStore.svg
Im Apple App Store herunterladen div.content > div.storeButtons > a.storeButton > img
www1.wdr.de/assets/img/icons/footer/AppleAppStore.svg
Zur Startseite WDR div.wrapper > div.topCon > a.logo > img.logoImg
www1.wdr.de/assets/img/wdr_logo.svg
zu WDR-Startseite div.section > div.content > a.logo > img.logoImg
www1.wdr.de/assets/img/wdr_logo_inv.svg

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

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: 283 ms
URLTime Spent
wdr.de/283 ms
www1.wdr.de/index.html0.0 ms
●Time to Interactive 2.3 s
●Max Potential First Input Delay 70 ms
●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoids enormous network payloads Total size was 2,335 KiB
●JavaScript execution time 0.1 s
●Minimizes main-thread work 0.5 s
●Avoid long main-thread tasks 1 long task found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 30 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 140 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
90

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 parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Der WDR Unternehmen Rundfunkbeitrag Presse Karriere Fernsehen Radio Studios in … div.section > div.content > nav.navGroups > div.navGroup
Service Programmvorschau WDR Text Hotlines Barrierefreiheit Leichte Sprache The… div.section > div.content > nav.navGroups > div.navGroup

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.

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
Gericht erlaubt Demos Castortransport von Jülich nach Ahaus läuft div.teaser > div.textCon > a.teaserlink > h4.headline
Unser neues Angebot für Web und App div.teaser > a.teaserlink > div.textCon > h4.headline
Bau für Hospiz- und Palliativzentrum beginnt Menschen können in Paderborn dauer… div.teaser > div.textCon > a.teaserlink > h4.headline
Köln div.teaser > a.teaserlink > div.textCon > h4.headline
Kosten für Rettungsdienst Wüst wirft Krankenkassen Erpressung vor div.teaser > div.textCon > a.teaserlink > h4.headline
Hoffnung auf Halbmast Wuppertaler Traditionsfirma Fahnen Herold insolvent div.teaser > div.textCon > a.teaserlink > h4.headline
Vor dem Pokal-Halbfinale gegen Bayern Bayer Leverkusen hofft auf die "magische … div.teaser > div.textCon > a.teaserlink > h4.headline
Schäden in Millionenhöhe Velbert will Schloss Hardenberg wieder aufbauen div.teaser > div.textCon > a.teaserlink > h4.headline
Kinopremiere in Essen "Vier von Hier" in der Lichtburg div.teaser > div.textCon > a.teaserlink > h4.headline
Lach- und Sachgeschichten div.teaser > a.teaserlink > div.textCon > h4.headline

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
Suchen fieldset > div.inputComponent > div.inputFieldWrapper > button.submit

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
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[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
●`[lang]` attributes have a valid value
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[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
○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.
○No element has a `[tabindex]` value greater than 0
○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.
77

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.

Deprecation / WarningSource
The disableRemotePlayback attribute should be used in order to disable the default Cast integration instead of using -internal-media-controls-overlay-cast-button selector.
www1.wdr.de/index.html

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www1.wdr.de/wahlembed-fix100.js line 15, col 3
ReferenceError: app is not defined at https://www1.wdr.de/wahlembed-fix100.js:16:4
www1.wdr.de/searchFormBugFix100.js
ReferenceError: FormularController is not defined at https://www1.wdr.de/searchFormBugFix100.js:1:1
www1.wdr.de/iframeresizer102.js line 26, col 37
ReferenceError: jQuery is not defined at https://www1.wdr.de/iframeresizer102.js:27:38

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
exporte.wdr.de/player/current/v-6.9.4/ardplayer-wdr.js?t=20564
●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 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.

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
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape li > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Video starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink
Audio starten, abbrechen mit Escape div.teaser > div.mediaCon > div.media > a.mediaLink

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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