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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.

44

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.

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
/themes/custom/bpbtheme/assets/fonts/bpb-iconfont/fonts/b...45 ms
/themes/custom/bpbtheme/assets/fonts/MessinaSansWeb/Messi...40 ms
/themes/custom/bpbtheme/assets/fonts/MessinaSansWeb/Messi...40 ms
/themes/custom/bpbtheme/assets/fonts/MessinaSansWeb/Messi...35 ms

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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:4.293 source:map[column:5103 line:754 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:75.41 source:map[column:1.193986e+06 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:0.682 source:map[column:932883 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:5.664 source:map[column:888604 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:8.937 source:map[column:890269 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:5.299 source:map[column:237780 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:31.954 source:map[column:237955 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:41.267 source:map[column:237993 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:22.344 source:map[column:924115 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:4.293 source:map[column:1313 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:1.998 source:map[column:924196 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]] map[reflowTime:2.18 source:map[column:867502 line:753 type:source-location url:https://www.bpb.de/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X-RkN2cqHjQhEM.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Neben einer großflächigen Photovoltaikanlage sind Batteriespeicher aufgestellt. article.teaser-backdrop > figure.teaser-backdrop__picture > picture.picture > img
www.bpb.de/cache/images/3/798153_homepage_topteaser_558x836.jpg?2A37F101.9 KiB60.4 KiB
Mitbegründer Jarosław Kaczyński ist immer noch spiritus movens der PiS, März 20… article.teaser-backdrop > figure.teaser-backdrop__picture > picture.picture > img
www.bpb.de/cache/images/6/798086_teaser_3x2_600.jpg?73E4543.3 KiB24.9 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:151.964 label:Time to first byte subpart:timeToFirstByte] map[duration:1238.831 label:Resource load delay subpart:resourceLoadDelay] map[duration:35.504 label:Resource load duration subpart:resourceLoadDuration] map[duration:1294.775 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: Neben einer großflächigen Photovoltaikanlage sind Batteriespeicher aufgestellt.
path: 1,HTML,1,BODY,0,DIV,3,MAIN,5,SECTION,1,ARTICLE,0,FIGURE,0,PICTURE,0,IMG
selector: article.teaser-backdrop > figure.teaser-backdrop__picture > picture.picture > img
snippet: <img src="/cache/images/3/798153_homepage_topteaser_558x836.jpg?2A37F" alt="Neben einer großflächigen Photovoltaikanlage sind Batteriespeicher aufgest…" data-img-complete="true">

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: Neben einer großflächigen Photovoltaikanlage sind Batteriespeicher aufgestellt.
path: 1,HTML,1,BODY,0,DIV,3,MAIN,5,SECTION,1,ARTICLE,0,FIGURE,0,PICTURE,0,IMG
selector: article.teaser-backdrop > figure.teaser-backdrop__picture > picture.picture > img
snippet: <img src="/cache/images/3/798153_homepage_topteaser_558x836.jpg?2A37F" alt="Neben einer großflächigen Photovoltaikanlage sind Batteriespeicher aufgest…" data-img-complete="true">

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.

URLTransfer SizeDuration
/sites/default/files/css/css_vAJqd_SsacwAoi3OJssd70jw1Dh4...168.4 KiB750 ms
/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X...362.1 KiB1.8 s
/sites/default/files/css/css_U-UkLvIUbnReU-Iv-67uifu50PFs...1.5 KiB

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

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.

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: 846 ms
URLTime Spent
bpb.de/846 ms
www.bpb.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

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: 750 ms 162.1 KiB
URLTransfer SizeEst Savings
/sites/default/files/css/css_vAJqd_SsacwAoi3OJssd70jw1Dh4...168.1 KiB162.1 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: 1.1 s 228.0 KiB
URLTransfer SizeEst Savings
/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X...361.8 KiB228.0 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X...3.8 s1.8 s116 ms
Unattributable246 ms5.7 ms0.0 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/7873.7c795960bcb1c4fc34db.js199 ms104 ms0.3 ms
/sites/default/files/css/css_vAJqd_SsacwAoi3OJssd70jw1Dh4...152 ms0.0 ms0.0 ms
www.bpb.de/144 ms4.1 ms2.5 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/6194.c904cddcfd75f833bcf2.js131 ms54 ms0.9 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/129.2533cf01e4e8d78ff238.js101 ms64 ms2.8 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/4777.65ea2899b70861fbabdc.js99 ms44 ms0.3 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/6379.785f21fd8a5541d25705.js91 ms56 ms0.5 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/9362.843da9bd4c6c47ac3bbe.js91 ms66 ms0.3 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/7134.80cb5a2f8cb93dfa4609.js67 ms62 ms0.6 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/2635.881cec12e44de38bb4b9.js61 ms59 ms1.3 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/5899.0c4f92212a621ca4eb28.js60 ms56 ms0.3 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/8404.57e3f29a644e4e21b15d.js58 ms58 ms0.4 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/105.25fbdc481d7b74ce2596.js56 ms55 ms1.1 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/6202.442f73a70b4343211e52.js55 ms53 ms0.4 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/242.093611321d58f5182f0f.js54 ms54 ms0.3 ms
www.bpb.de/themes/custom/bpbtheme/assets/js/1757.e1982ae50930c040b6e8.js54 ms52 ms1.4 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 Evaluation3.2 s
Style & Layout1.2 s
Other770 ms
Rendering371 ms
Parse HTML & CSS237 ms
Garbage Collection192 ms
Script Parsing & Compilation138 ms

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
Handreichung „Kritische Auseinandersetzung mit Klassismus“ div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Pazifismus - mit Olaf Müller und Daniel Hedinger div.teaser-media-indicator-swap__picture-wrapper > figure.teaser-media-indicator-swap__picture > picture.picture > img
data:,
Der Titel ist von schräg verlaufenden hellgrünen Streifen umgeben. figure.teaser-shop__picture > div.teaser-shop__picture-inner > picture.picture > img
data:,
Audio: 70 Jahre Bundesnachrichtendienst div.teaser-media-indicator-swap__picture-wrapper > figure.teaser-media-indicator-swap__picture > picture.picture > img
data:,
Folge 6 – Lektionen für Deutschland div.teaser-media-indicator-swap__picture-wrapper > figure.teaser-media-indicator-swap__picture > picture.picture > img
data:,
Folge 4 – Zivilgesellschaft div.teaser-media-indicator-swap__picture-wrapper > figure.teaser-media-indicator-swap__picture > picture.picture > img
data:,
Timer 2026/2027 Hardcover „Fluid“ div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Wandkalender Timer 2026/2027 div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Das Grundgesetz. Die Grundrechte div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Der rechte Rand Europas div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Spicker Bundeswehr figure.teaser-shop__picture > div.teaser-shop__picture-inner > picture.picture > img
data:,
Schicksalsjahr 1925 div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Globale Monarchie div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
China und Russland div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Pazifismus div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,
Palästina 1936 div.scroller__item > div.scroller-gallery__transformer > picture.picture > img
data:,

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

●Use efficient cache lifetimes
●Layout shift culprits
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 942 KiB
●Avoid long main-thread tasks 19 long tasks found
●Avoid non-composited animations 46 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 30 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
○INP breakdown
○User Timing marks and measures
○Avoid large layout shifts
97

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

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
Hintergrund aktuell Parlamentswahl in Bulgarien Inhalt merken div#scroller-121 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Aus Politik und Zeitgeschichte Demografie Inhalt merken div#scroller-121 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Innere Sicherheit Was ist Politisch motivierte Kriminalität? Inhalt merken div#scroller-121 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Infografiken Zahlen zu Asyl in Deutschland Inhalt merken div#scroller-121 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Deutschland Archiv Hilde Eisler – ostdeutsche Kulturjournalistin Inhalt merken div#scroller-121 > div.flickity-viewport > div.flickity-slider > div.scroller__item
euro|topics Debatte Externer Link: EuGH: Rüffel für Orbáns LGBTQ-Gesetz Seit 2… div#carousel-35334 > div.flickity-viewport > div.flickity-slider > div.scroller__item
euro|topics Debatte Externer Link: Portugal: Sollte Saramago Pflichtlektüre ble… div#carousel-35334 > div.flickity-viewport > div.flickity-slider > div.scroller__item
euro|topics-Debatte Externer Link: Bulgarien-Wahl: Was steht Europa mit Radew b… div#carousel-35334 > div.flickity-viewport > div.flickity-slider > div.scroller__item
euro|topics-Debatte Externer Link: Was bedeutet die Mandelson-Affäre für Starme… div#carousel-35334 > div.flickity-viewport > div.flickity-slider > div.scroller__item
euro|topics-Debatte Externer Link: Iran-Krieg: Weitere Eskalation oder Gespräch… div#carousel-35334 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Iran Machtkonstante Theokratie: Iran nach 1979 Inhalt merken Irans politisches… div#carousel-45786 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Israel 2025 Iran und Israel Inhalt merken Durch Unterstützung verbündeter Mili… div#carousel-45786 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Hintergrund aktuell Chronik: Irans Atomprogramm Inhalt merken Um das iranische… div#carousel-45786 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Israel 2025 Beziehungen zwischen den USA und Israel Inhalt merken Seit langem … div#carousel-45786 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Zahlen und Fakten Energieexport und -import Inhalt merken Werden Öl, Kohle und… div#carousel-45786 > div.flickity-viewport > div.flickity-slider > div.scroller__item
4 Min. Audio Dauer 4 Min. Audio: 70 Jahre Bundesnachrichtendienst Inhalt merken… div#scroller-37212 > div.flickity-viewport > div.flickity-slider > div.scroller__item
43 Min. Audio Dauer 43 Min. Folge 6 – Lektionen für Deutschland Inhalt merken … div#scroller-37212 > div.flickity-viewport > div.flickity-slider > div.scroller__item
50 Min. Audio Dauer 50 Min. Folge 4 – Zivilgesellschaft Inhalt merken Autokrat… div#scroller-37212 > div.flickity-viewport > div.flickity-slider > div.scroller__item
einfach POLITIK Eine Einführung Inhalt merken PDF-Publikation (zum Herunterlade… div#carousel-35273 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Werkstatt Das Fediverse als Raum politischer Bildung Inhalt merken Das Fediver… div#carousel-35273 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Portal EU-Projekttag 2026 an Schulen Inhalt merken Jedes Jahr diskutieren deut… div#carousel-35273 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Rezensiert und kuratiert Games zur politischen Bildung Inhalt merken Digitale … div#carousel-35273 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Wie wir lernen Künstliche Intelligenz (KI) und Bildung Inhalt merken Künstlich… div#carousel-35273 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Podium / Vortrag veranstaltet von der bpb Orte gesellschaftlicher Auseinanderse… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Wahl-O-Mat veranstaltet von der bpb Workshop für den Wahl-O-Mat zur Landtagswah… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Eltern-LAN veranstaltet von der bpb Digitale Eltern-LAN am 10.06.2026 – Roblox … div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Konferenz / Tagung veranstaltet von der bpb 13. Kulturpolitischer Bundeskongres… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Wahl-O-Mat veranstaltet von der bpb Workshop für den Wahl-O-Mat zur Abgeordnete… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Wahl-O-Mat veranstaltet von der bpb Workshop für den Wahl-O-Mat zur Landtagswah… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Podium / Vortrag veranstaltet von der bpb zwischen/miete diskursiv mit Julia Fr… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Konferenz / Tagung veranstaltet von der bpb „Was heißt schon alt? Politische Bi… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Messe veranstaltet von der bpb Die bpb auf der Gamescom 2026 – „Democracy at Pl… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Konferenz / Tagung veranstaltet von der bpb 3. Fachtagung Politische Medienbild… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
Konferenz / Tagung veranstaltet von der bpb Politische Bildung im digitalen Rau… div#carousel-45284 > div.flickity-viewport > div.flickity-slider > div.scroller__item
kinofenster.de Inhalt merken Das filmpädagogische Online-Portal der bpb widmet… div#carousel-is-white > div.flickity-viewport > div.flickity-slider > div.scroller__item
Wir waren so frei... Momentaufnahmen 1989/1990 Inhalt merken Das Internet-Achi… div#carousel-is-white > div.flickity-viewport > div.flickity-slider > div.scroller__item
App "Berliner Mauer" Inhalt merken Neue Tour durch Kreuzberg-Friedrichshain: V… div#carousel-is-white > div.flickity-viewport > div.flickity-slider > div.scroller__item
Jugendopposition in der DDR Inhalt merken Wie haben junge Menschen in der DDR … div#carousel-is-white > div.flickity-viewport > div.flickity-slider > div.scroller__item
spielbar.de Inhalt merken spielbar.de informiert über Computerspiele und erste… div#carousel-is-white > div.flickity-viewport > div.flickity-slider > div.scroller__item

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.

○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
●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
●`[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
●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
●Heading elements appear in a sequentially-descending order
●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
○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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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.
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
/sites/default/files/js/js_dK60XH05EgZeeV86BHWie9c_QkiB_X...
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www.bpb.de/themes/custom/bpbtheme/assets/js/8439.f956b44d01d980d3a237.jswww.bpb.de/themes/custom/bpbtheme/assets/js/8439.f956b44d01d980d3a237.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/8404.57e3f29a644e4e21b15d.jswww.bpb.de/themes/custom/bpbtheme/assets/js/8404.57e3f29a644e4e21b15d.js.map
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www.bpb.de/themes/custom/bpbtheme/assets/js/6379.785f21fd8a5541d25705.jswww.bpb.de/themes/custom/bpbtheme/assets/js/6379.785f21fd8a5541d25705.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/6202.442f73a70b4343211e52.jswww.bpb.de/themes/custom/bpbtheme/assets/js/6202.442f73a70b4343211e52.js.map
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www.bpb.de/themes/custom/bpbtheme/assets/js/5837.bc045cdbddd43d194e5b.jswww.bpb.de/themes/custom/bpbtheme/assets/js/5837.bc045cdbddd43d194e5b.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/5816.083e634ab3e5c4da7315.jswww.bpb.de/themes/custom/bpbtheme/assets/js/5816.083e634ab3e5c4da7315.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/5699.b14c8d9e5cf114836046.jswww.bpb.de/themes/custom/bpbtheme/assets/js/5699.b14c8d9e5cf114836046.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/5152.d2bc131c5434b589ea2b.jswww.bpb.de/themes/custom/bpbtheme/assets/js/5152.d2bc131c5434b589ea2b.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/4777.65ea2899b70861fbabdc.jswww.bpb.de/themes/custom/bpbtheme/assets/js/4777.65ea2899b70861fbabdc.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/4441.b5d7c383ff0c1da8e793.jswww.bpb.de/themes/custom/bpbtheme/assets/js/4441.b5d7c383ff0c1da8e793.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/4299.a98fc13f8fbb1274b4e0.jswww.bpb.de/themes/custom/bpbtheme/assets/js/4299.a98fc13f8fbb1274b4e0.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/3915.66ba28457971fef10907.jswww.bpb.de/themes/custom/bpbtheme/assets/js/3915.66ba28457971fef10907.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/3882.bfc6e02b17117550a6fc.jswww.bpb.de/themes/custom/bpbtheme/assets/js/3882.bfc6e02b17117550a6fc.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/375.06367c1ebcf464e00a76.jswww.bpb.de/themes/custom/bpbtheme/assets/js/375.06367c1ebcf464e00a76.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/2817.975bdf87031920e7f3fa.jswww.bpb.de/themes/custom/bpbtheme/assets/js/2817.975bdf87031920e7f3fa.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/2635.881cec12e44de38bb4b9.jswww.bpb.de/themes/custom/bpbtheme/assets/js/2635.881cec12e44de38bb4b9.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/242.093611321d58f5182f0f.jswww.bpb.de/themes/custom/bpbtheme/assets/js/242.093611321d58f5182f0f.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/237.1c6d29740ea1eb894b4e.jswww.bpb.de/themes/custom/bpbtheme/assets/js/237.1c6d29740ea1eb894b4e.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/2161.2e35aa4dc46abec1931b.jswww.bpb.de/themes/custom/bpbtheme/assets/js/2161.2e35aa4dc46abec1931b.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/1954.37773c7c7645891f91ce.jswww.bpb.de/themes/custom/bpbtheme/assets/js/1954.37773c7c7645891f91ce.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/1757.e1982ae50930c040b6e8.jswww.bpb.de/themes/custom/bpbtheme/assets/js/1757.e1982ae50930c040b6e8.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/129.2533cf01e4e8d78ff238.jswww.bpb.de/themes/custom/bpbtheme/assets/js/129.2533cf01e4e8d78ff238.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/1114.df82f3164b74bfa255ab.jswww.bpb.de/themes/custom/bpbtheme/assets/js/1114.df82f3164b74bfa255ab.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/111.8610825ddabe5a1fd657.jswww.bpb.de/themes/custom/bpbtheme/assets/js/111.8610825ddabe5a1fd657.js.map
www.bpb.de/themes/custom/bpbtheme/assets/js/105.25fbdc481d7b74ce2596.jswww.bpb.de/themes/custom/bpbtheme/assets/js/105.25fbdc481d7b74ce2596.js.map
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

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

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