Skip to content
https://bundestag.de

Lighthouse Desktop

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

Detailed Report

Audit breakdown by category with detailed findings.

61

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
www.bundestag.de/resource/themes/bundestag/js/libs_wojq-596282-119.js3600.0 s263.4 KiB
/resource/blob/904178/3cdc1c8237ad3082d2b05cd97d77f79a/no...900.0 s181.1 KiB
www.bundestag.de/resource/themes/bundestag/js/vue-859624-56.js3600.0 s199.2 KiB
/resource/blob/904202/c6749d9d17967b87a838bb7ef27c427d/no...900.0 s168.1 KiB
webtv.bundestag.de/statics/tplayer/latest/production/lib/tv1hlsplayer.js86400.0 s362.8 KiB
www.bundestag.de/resource/themes/bundestag/css/bundestag-596334-123.css3600.0 s130.6 KiB
/resource/blob/904106/55a9fa2c892791cf3f587d1d3c0f758f/RL...900.0 s104.7 KiB
www.bundestag.de/resource/themes/bundestag/js/bt.ts-1031834-16.js3600.0 s88.8 KiB
statistik.bundestag.de/matomo.js0.0 ms66.7 KiB
/resource/image/1108250/16x9/608/342/82fce1d59ea304bb917f...3600.0 s50.6 KiB
/resource/blob/904110/d5e79c5138171b42fb92fa4bf1db1cc0/RL...900.0 s36.0 KiB
www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js3600.0 s31.0 KiB
/resource/blob/904112/2576ec4f42dd43cbda4c431a391f3e67/RL...900.0 s24.5 KiB
/resource/image/1164752/16x9/304/171/dfec8221e827a6310de5...3600.0 s24.9 KiB
/resource/image/1148914/16x9/304/171/b2fec0d0160ca299f3b7...3600.0 s23.9 KiB
/resource/blob/904114/9f0b5080fc77e6528b7c41a3086da539/RL...900.0 s20.0 KiB
www.bundestag.de/resource/themes/bundestag/js/Modules-596288-113.js3600.0 s22.1 KiB
/resource/blob/596236/c2428bf72618eb8b14cf410c99248144/bt...900.0 s19.5 KiB
/resource/image/1165872/16x9/304/171/2450fa75fe2366f3d050...3600.0 s21.5 KiB
www.bundestag.de/resource/themes/bundestag/js/scripts-596300-130.js3600.0 s21.0 KiB
/resource/image/1165914/16x9/304/171/fb34b7fe0e14cba9234c...3600.0 s19.6 KiB
/resource/image/1164712/16x9/304/171/9f526d6c0f61b66b2230...3600.0 s19.3 KiB
/resource/image/883996/16x9/304/171/e4d1f956e78f4119192c3...3600.0 s18.9 KiB
/resource/image/1161958/16x9/304/171/16136bc4c1f2f90ae81f...3600.0 s17.6 KiB
/resource/blob/1035192/2e7fb042871afa6c184cf2a5010d3c2d/K...900.0 s15.7 KiB
/resource/image/1166794/16x9/304/171/6cc233864249c63d88b1...3600.0 s17.4 KiB
/resource/image/1164690/16x9/304/171/f6cd3f7a27de5dd8515d...3600.0 s17.2 KiB
/resource/image/1165920/16x9/304/171/b33fff008501a51ae8c0...3600.0 s17.0 KiB
/resource/image/1166802/16x9/304/171/59801585b9f49df70ca2...3600.0 s16.8 KiB
/resource/image/1165898/16x9/304/171/ff8eaab55a739cfee023...3600.0 s16.4 KiB
/resource/image/1161964/16x9/304/171/75a83f568593aa5b4c4f...3600.0 s16.4 KiB
/resource/image/1145280/16x9/304/171/6cf110deb9ff9809f0bd...3600.0 s16.2 KiB
/resource/image/1165908/16x9/304/171/ac04dbd9baa14899341a...3600.0 s15.4 KiB
/resource/image/1058426/16x9/304/171/369eb5e3c629988cf46c...3600.0 s15.2 KiB
/resource/image/1165278/16x9/304/171/d712f428f5ccef8458e0...3600.0 s14.3 KiB
/resource/image/1165886/16x9/304/171/475bc9b92f7d230bdd41...3600.0 s14.2 KiB
/resource/image/1145288/16x9/304/171/a271f7a409f977495f5b...3600.0 s14.0 KiB
/resource/image/1166338/16x9/304/171/87bb340ef0527295bb1c...3600.0 s13.9 KiB
/resource/image/1164756/16x9/304/171/8fc069eff7c0a234e51b...3600.0 s13.8 KiB
/resource/image/1165966/16x9/304/171/5b269d87347df5e53500...3600.0 s13.2 KiB
/resource/image/1145274/16x9/304/171/fb25b725f88321a39382...3600.0 s12.7 KiB
/resource/image/1166796/16x9/304/171/e605dd0f51fba791c09b...3600.0 s12.1 KiB
/resource/image/1155374/16x9/304/171/4c078c3e5d76feb27284...3600.0 s12.1 KiB
/resource/image/1162126/16x9/304/171/9ff4f5c9e17d8f04d870...3600.0 s11.6 KiB
/resource/image/1166810/16x9/304/171/6f98456dcb900dc1ee77...3600.0 s11.5 KiB
/resource/image/1145276/16x9/304/171/384c59d173faecb14d54...3600.0 s11.4 KiB
/resource/image/1166816/16x9/304/171/7d3c3f2e8006a78e02de...3600.0 s11.1 KiB
/resource/image/1157088/16x9/304/171/dcc09c257100d51981b4...3600.0 s11.0 KiB
/resource/image/1164700/16x9/304/171/e53c4eb0e43cd46a71be...3600.0 s10.5 KiB
/resource/image/1164736/16x9/304/171/c764e6cf5604728c4eef...3600.0 s10.4 KiB
/resource/image/1165280/16x9/304/171/7df334170f780bf581d8...3600.0 s9.4 KiB
www.bundestag.de/resource/themes/bundestag/js/Filter-596270-70.js3600.0 s9.1 KiB
/resource/image/1161900/16x9/304/171/410668505ef9b96237f6...3600.0 s8.0 KiB
/resource/image/1164696/16x9/304/171/d7465ad3e3ca7271e954...3600.0 s7.9 KiB
/resource/image/1164686/16x9/304/171/5d5fca43afd5392dfb45...3600.0 s7.9 KiB
/resource/blob/1035198/612db0f15c784837996511bd72943c2a/D...900.0 s6.6 KiB
/resource/blob/1035204/afc7e2564f879b6b2b09222d4a54e48a/M...900.0 s5.7 KiB
www.bundestag.de/resource/themes/bundestag/js/Transformator-596314-69.js3600.0 s6.1 KiB
www.bundestag.de/resource/themes/bundestag/js/commons-1031836-4.js3600.0 s5.1 KiB
www.bundestag.de/resource/themes/bundestag/js/Slider-596304-70.js3600.0 s4.8 KiB
www.bundestag.de/resource/themes/bundestag/js/Map-596286-64.js3600.0 s4.2 KiB
www.bundestag.de/resource/themes/bundestag/js/Video-596320-69.js3600.0 s3.6 KiB
www.bundestag.de/resource/themes/bundestag/css/print-596346-68.css3600.0 s3.6 KiB
www.bundestag.de/resource/themes/bundestag/js/respond.min-596298-59.js3600.0 s3.1 KiB
www.bundestag.de/resource/themes/bundestag/js/ImageLoader-596276-63.js3600.0 s2.6 KiB
www.bundestag.de/resource/themes/bundestag/js/System-596310-72.js3600.0 s2.4 KiB
www.bundestag.de/resource/themes/bundestag/js/Charts-596256-63.js3600.0 s2.3 KiB
www.bundestag.de/resource/themes/bundestag/js/Datepicker-596262-65.js3600.0 s2.3 KiB
www.bundestag.de/resource/themes/bundestag/js/DataLoader-596260-64.js3600.0 s2.1 KiB
www.bundestag.de/resource/themes/bundestag/js/Countdown-850232-25.js3600.0 s2.1 KiB
www.bundestag.de/resource/themes/bundestag/js/UrlParameterHandler-596318-62.js3600.0 s2.1 KiB
www.bundestag.de/resource/blob/992910/WhatsApp-Icon.svg3600.0 s2.1 KiB
www.bundestag.de/resource/themes/bundestag/js/Tabs-596312-64.js3600.0 s2.0 KiB
www.bundestag.de/resource/themes/bundestag/js/UrlHashHandler-596316-63.js3600.0 s1.9 KiB
www.bundestag.de/resource/themes/bundestag/js/na-596290-62.js3600.0 s1.9 KiB
www.bundestag.de/resource/themes/bundestag/js/Pagination-596296-62.js3600.0 s1.8 KiB
/resource/themes/bundestag/js/JQueryBreakpointComponent-5...3600.0 s1.8 KiB
www.bundestag.de/resource/themes/bundestag/js/Suche-596306-62.js3600.0 s1.8 KiB
www.bundestag.de/resource/blob/969636/Instagram-Icon.svg3600.0 s1.6 KiB
www.bundestag.de/resource/blob/969650/Mastodon-Icon.svg3600.0 s1.5 KiB
www.bundestag.de/resource/blob/969644/LinkedIn-Icon.svg3600.0 s1.4 KiB
www.bundestag.de/resource/blob/969666/YouTube-Icon.svg3600.0 s1.4 KiB
www.bundestag.de/resource/themes/bundestag/js/chunkPathById-1152094-3.js3600.0 s1.3 KiB

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:0.007908] map[node:map[boundingRect:map[bottom:2952 height:460 left:0 right:1350 top:2492 width:1350] lhId:page-3-SECTION nodeLabel:Öffentliche Ausschusssitzungen Zurück Forschung, Technologie, Raumfahrt und Tec… path:1,HTML,1,BODY,4,MAIN,5,SECTION selector:body > main#main > section.bt-module-row snippet:<section class="bt-module-row bt-module-row-ausschuss-termine bt-ausschuss-termine bt-modu…" data-sliderselector=".bt-slider"> type:node] score:0.007887 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:5727 height:32 left:657 right:685 top:5695 width:28] lhId:page-10-IMG nodeLabel:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon path:1,HTML,1,BODY,5,FOOTER,1,DIV,0,DIV,2,DIV,0,UL,0,LI,0,BUTTON,0,IMG selector:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon snippet:<img class="bt-footer-social__icon" src="/resource/blob/969636/Instagram-Icon.svg" alt="" aria-hidden="true"> type:node]] map[cause:Web font extra:map[type:url value:https://www.bundestag.de/resource/blob/904202/c6749d9d17967b87a838bb7ef27c427d/noto-serif-v21-vietnamese_latin-ext_latin_greek-ext_greek_cyrillic-ext_cyrillic-regular-woff2.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:2700 height:43 left:90 right:186 top:2657 width:96] lhId:page-1-SPAN nodeLabel:22 path:1,HTML,1,BODY,4,MAIN,5,SECTION,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,ARTICLE,3,TIME,1,SPAN selector:div.bt-slide > article.bt-teaser-termin > time.bt-teaser-termin__date > span.bt-teaser-termin__date-day snippet:<span class="bt-teaser-termin__date-day"> type:node] score:2.1e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:5727 height:32 left:657 right:685 top:5695 width:28] lhId:page-10-IMG nodeLabel:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon path:1,HTML,1,BODY,5,FOOTER,1,DIV,0,DIV,2,DIV,0,UL,0,LI,0,BUTTON,0,IMG selector:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon snippet:<img class="bt-footer-social__icon" src="/resource/blob/969636/Instagram-Icon.svg" alt="" aria-hidden="true"> type:node]] map[cause:Web font extra:map[type:url value:https://www.bundestag.de/resource/blob/596236/c2428bf72618eb8b14cf410c99248144/bt-icons-woff2.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:0.320731] map[node:map[boundingRect:map[bottom:2492 height:967 left:0 right:1350 top:1525 width:1350] lhId:page-6-SECTION nodeLabel:Ausschüsse Bildinformationen Shell-Raststätte Kraichgau Süd an der Autobahn A6… path:1,HTML,1,BODY,4,MAIN,4,SECTION selector:body > main#main > section#slider-531790 snippet:<section id="slider-531790" class="bt-module-row bt-module-slider bt-module-row--gray bt-module-row-aktuell b…"> type:node] score:0.264246] map[node:map[boundingRect:map[bottom:2952 height:460 left:0 right:1350 top:2492 width:1350] lhId:page-3-SECTION nodeLabel:Öffentliche Ausschusssitzungen Zurück Forschung, Technologie, Raumfahrt und Tec… path:1,HTML,1,BODY,4,MAIN,5,SECTION selector:body > main#main > section.bt-module-row snippet:<section class="bt-module-row bt-module-row-ausschuss-termine bt-ausschuss-termine bt-modu…" data-sliderselector=".bt-slider"> type:node] score:0.056485 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:5727 height:32 left:657 right:685 top:5695 width:28] lhId:page-10-IMG nodeLabel:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon path:1,HTML,1,BODY,5,FOOTER,1,DIV,0,DIV,2,DIV,0,UL,0,LI,0,BUTTON,0,IMG selector:ul.bt-footer-social > li.bt-footer-social__wrapper > button.bt-footer-social__toggle > img.bt-footer-social__icon snippet:<img class="bt-footer-social__icon" src="/resource/blob/969636/Instagram-Icon.svg" alt="" aria-hidden="true"> type:node]]] type:subitems]]]

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
/resource/blob/904178/3cdc1c8237ad3082d2b05cd97d77f79a/no...30 ms
/resource/blob/904202/c6749d9d17967b87a838bb7ef27c427d/no...15 ms
/resource/blob/596236/c2428bf72618eb8b14cf410c99248144/bt...5.0 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:165.279 source:map[column:79421 line:21 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.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:123.582 source:map[type:text value:[unattributed]]] map[reflowTime:0.819 source:map[column:49936 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:0.439 source:map[column:49994 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:0.387 source:map[column:50058 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:244.874 source:map[column:49218 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:0.735 source:map[column:50994 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:117.055 source:map[column:78766 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:23.11 source:map[column:231375 line:52 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/vue-859624-56.js urlProvider:network]] map[reflowTime:0.647 source:map[column:189924 line:30 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/libs_wojq-596282-119.js urlProvider:network]] map[reflowTime:20.666 source:map[column:49240 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js urlProvider:network]] map[reflowTime:7.12 source:map[column:84277 line:20 type:source-location url:https://www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.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: Bundesministerin für Forschung, Technologie und Raumfahrt, Dorothee Bär und Kan…
path: 1,HTML,1,BODY,4,MAIN,2,SECTION,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,PICTURE,1,IMG
selector: div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
snippet: <img data-v-4c06f1b5="" loading="lazy" src="https://www.bundestag.de/resource/image/1145274/16x9/304/171/fb25b725f8832…" alt="Bundesministerin für Forschung, Technologie und Raumfahrt, Dorothee Bär un…" sizes="(min-width: 1200px) 281px, (min-width: 992px) 296px, (min-width: 768px) 28…" class="img-responsive">

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
www.bundestag.de/resource/themes/bundestag/js/chunkPathById-1152094-3.js1.3 KiB
www.bundestag.de/resource/themes/bundestag/js/respond.min-596298-59.js3.1 KiB
www.bundestag.de/resource/themes/bundestag/css/bundestag-596334-123.css130.6 KiB120 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Wilder Wein wächst an Mietshäusern aus den 1920er/1930er Jahren, aufgenommen in… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1164752/16x9/304/171/dfec8221e827a6310de5...23.9 KiB15.8 KiB
Symbolbild: Reichstagsgebäude mit bunten Banderolen. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1108250/16x9/608/342/82fce1d59ea304bb917f...49.6 KiB15.7 KiB
Symbolbild mit auf Paragrafenzeichen stehenden Tierfiguren div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1148914/16x9/304/171/b2fec0d0160ca299f3b7...22.8 KiB14.8 KiB
Ein Foto von gestapelten Containern in verschiedenen Farben auf einem Terminalg… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165872/16x9/304/171/2450fa75fe2366f3d050...20.4 KiB12.4 KiB
Ein Foto eines Haustürschlüssels mit einem bunten Anhänger in Form eines Hauses… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165914/16x9/304/171/fb34b7fe0e14cba9234c...18.5 KiB10.5 KiB
Themenbild zum Thema: Industrieemissionen rohstoffverarbeitende Industrie div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1164712/16x9/304/171/9f526d6c0f61b66b2230...18.2 KiB10.1 KiB
Die Flaggen der EU, der Ukraine und Deutschland vor dem Reichstagsgebäude div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/883996/16x9/304/171/e4d1f956e78f4119192c3...17.8 KiB9.7 KiB
Symbolbild mit einem Schild einer Steuerkanzlei auf dem Steuerkanzlei steht div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1161958/16x9/304/171/16136bc4c1f2f90ae81f...16.6 KiB8.6 KiB
Eine Luftaufnahme eines Asylheims in Fischlaken, umgeben von Wäldern und Wiesen. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1166794/16x9/304/171/6cc233864249c63d88b1...16.4 KiB8.3 KiB
Ein Radweg führt durch ein neu gebautes Wohngebiet. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1164690/16x9/304/171/f6cd3f7a27de5dd8515d...16.2 KiB8.1 KiB
Goldmünzen liegen auf einem Euro Geldschein als Symbolbild für Reichtum und Woh… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165920/16x9/304/171/b33fff008501a51ae8c0...15.9 KiB7.8 KiB
Zwei Personen in blauen Schutzanzügen betrachten einen großen, silbernen Sauers… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1166802/16x9/304/171/59801585b9f49df70ca2...15.8 KiB7.8 KiB
Ein Foto von Polizisten in schwarzer Uniform am Niedersächsischen Studieninstit… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165898/16x9/304/171/ff8eaab55a739cfee023...15.4 KiB7.4 KiB
Symbolbild: Zwei Personen sitzen sich gegenüber und arbeiten am Laptop. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1161964/16x9/304/171/75a83f568593aa5b4c4f...15.4 KiB7.4 KiB
Adler im Plenarsaal des Deutschen Bundestages. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1145280/16x9/304/171/6cf110deb9ff9809f0bd...15.1 KiB7.1 KiB
Ein Foto zeigt die Worte nein heisst nein in weißer Kreide, die auf einem graue… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165908/16x9/304/171/ac04dbd9baa14899341a...14.3 KiB6.3 KiB
Blick auf die Kuppel des Reichstagsgebäudes div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1058426/16x9/304/171/369eb5e3c629988cf46c...14.1 KiB6.1 KiB
Das Wort Petition steht auf einer Computertastatur. div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165278/16x9/304/171/d712f428f5ccef8458e0...13.3 KiB5.3 KiB
Ein Foto zeigt mehrere Yachten im Hafen von Cannes, Provence-Alpes-Côte d'Azur.… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165886/16x9/304/171/475bc9b92f7d230bdd41...13.2 KiB5.2 KiB
Abgeordnete im Plenarsaal stimmen durch Handzeichen ab. Blick hinter den Sitzre… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1145288/16x9/304/171/a271f7a409f977495f5b...13.0 KiB5.0 KiB
Eine Preistafel an einer Tankstelle mit hohen Kraftstoffpreisen. Im Hintergrund… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1166338/16x9/304/171/87bb340ef0527295bb1c...12.9 KiB4.9 KiB
Ein kleines Mädchen sitzt in einer Küche und schaut sich Videos auf einem Smart… div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1164756/16x9/304/171/8fc069eff7c0a234e51b...12.8 KiB4.7 KiB
Ein Hafen in Duisburg mit gestapelten Frachtcontainern und einem Kran über dem … div.bt-fl-teaser > div.bt-bild-standard > picture > img.img-responsive
/resource/image/1165966/16x9/304/171/5b269d87347df5e53500...12.2 KiB4.2 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: 202 ms
URLTime Spent
bundestag.de/202 ms
www.bundestag.de/0.0 ms

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
Ausschüsse Bildinformationen Shell-Raststätte Kraichgau Süd an der Autobahn A6… body > main#main > section#slider-531790
0.264
Öffentliche Ausschusssitzungen Zurück Forschung, Technologie, Raumfahrt und Tec… body > main#main > section.bt-module-row
0.056
Öffentliche Ausschusssitzungen Zurück Forschung, Technologie, Raumfahrt und Tec… body > main#main > section.bt-module-row
0.008
22 div.bt-slide > article.bt-teaser-termin > time.bt-teaser-termin__date > span.bt-teaser-termin__date-day
0.000

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.

Estimated savings: 580 ms 823.9 KiB
URLTransfer SizeEst Savings
webtv.bundestag.de/statics/tplayer/latest/production/lib/tv1hlsplayer.js361.9 KiB208.9 KiB
webtv.bundestag.de/statics/tplayer/latest/production/lib/tv1hlsplayer.js361.9 KiB208.8 KiB
www.bundestag.de/resource/themes/bundestag/js/libs_wojq-596282-119.js261.7 KiB207.5 KiB
www.bundestag.de/resource/themes/bundestag/js/vue-859624-56.js198.2 KiB86.3 KiB
www.bundestag.de/resource/themes/bundestag/js/bt.ts-1031834-16.js87.8 KiB75.8 KiB
statistik.bundestag.de/matomo.js66.4 KiB36.7 KiB

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
Other1.3 s
Script Evaluation1.0 s
Style & Layout908 ms
Script Parsing & Compilation159 ms
Rendering133 ms
Parse HTML & CSS124 ms
Garbage Collection29 ms

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 74.3 KiB
URLTransfer SizeEst Savings
./src/slider/FlSlider.vue11.8 KiB11.5 KiB
./src/slider/TeaserComponent.vue9.4 KiB6.8 KiB
./src/slider/NavButton.vue5.6 KiB5.0 KiB
./src/slider/RollCallVotesComponent.vue6.2 KiB4.9 KiB
./src/slider/TextComponent.vue4.8 KiB4.3 KiB
./src/slider/CardComponent.vue5.2 KiB4.2 KiB
./Statistics.vue4.1 KiB3.6 KiB
./Mdb.vue3.7 KiB3.3 KiB
./src/sitzplan/filter/CheckboxFilter.vue3.0 KiB2.7 KiB
./src/sitzplan/SitzplanContent.vue3.1 KiB2.6 KiB
./src/slider/Pagination.vue2.7 KiB2.5 KiB
./src/slider/CalendarComponent.vue3.0 KiB2.5 KiB
./src/slider/SliderLink.vue2.7 KiB2.5 KiB
./src/sitzplan/infobereich/NaInfo.vue2.7 KiB2.4 KiB
./src/sitzplan/Tooltip.vue2.6 KiB2.3 KiB
./src/sitzplan/filter/NormalFilter.vue2.5 KiB2.3 KiB
./src/sitzplan/filter/RadioFilter.vue2.4 KiB2.2 KiB
./src/sitzplan/filter/NaButton.vue2.4 KiB2.2 KiB
./src/sitzplan/infobereich/VoteCount.vue2.4 KiB2.2 KiB
./src/sitzplan/HeaderArea.vue2.2 KiB2.1 KiB
./src/sitzplan/StaticTooltip.vue2.1 KiB2.1 KiB

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 10.1 KiB
URLTransfer SizeEst Savings
./src/slider/FlSlider.vue11.8 KiB10.1 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
ul.bt-footer-social > li.bt-footer-social__wrapper > a.bt-footer-social__toggle > img.bt-footer-social__icon ul.bt-footer-social > li.bt-footer-social__wrapper > a.bt-footer-social__toggle > img.bt-footer-social__icon
www.bundestag.de/resource/blob/992910/WhatsApp-Icon.svg

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

●Max Potential First Input Delay 100 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify JavaScript
●Avoids enormous network payloads Total size was 2,511 KiB
●JavaScript execution time 1.1 s
●Avoid long main-thread tasks 11 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 10 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 10 ms
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
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
21.04.2026 Recht und Verbraucherschutz Ermittlungsverfahren des GBA mit Terro… div.bt-slider > div.slick-list > div.slick-track > div.col-xs-12
21.04.2026 Auswärtiges Linke thematisiert völkerrechtliches Gewaltverbot div.bt-slider > div.slick-list > div.slick-track > div.col-xs-12
21.04.2026 Bundestagsnachrichten Keine Angaben zur operativen Tätigkeit des B… div.bt-slider > div.slick-list > div.slick-track > div.col-xs-12
21.04.2026 Auswärtiges Etwaige Lieferung von Schiffsabwehrraketen an den Iran div.bt-slider > div.slick-list > div.slick-track > div.col-xs-12
Medien Veröffentlichung gesundheitsbezogener Inhalte nur bei deutlich erkennba… div.bt-slider > div.slick-list > div.slick-track > div.col-xs-6
Gesetzliche Krankenversicherung - Leistungen Aufhebung der Kürzung des Nettoei… div.bt-slider > div.slick-list > div.slick-track > div.col-xs-6
Gesundheitsfachberufe Aufnahme der Berufsausbildung zum Notfallsanitäter als s… div.bt-slider > div.slick-list > div.slick-track > div.col-xs-6
Instagram-Kanäle Bundestag (Externer Link, Link öffnet ein neues Fenster) Bunde… div.only-sm-up > ul.bt-footer-social > li.bt-footer-social__wrapper > div.bt-footer-social__popup
Mastodon-Kanäle Bundestag (Externer Link, Link öffnet ein neues Fenster) hib-Na… div.only-sm-up > ul.bt-footer-social > li.bt-footer-social__wrapper > div.bt-footer-social__popup

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.

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
DE nav.nav-service > ul.nav-service__list > li.bt-langnavi-toggle > button.bt-langnavi-toggle__button
Jugendportal mitmischen.de div.bt-fl-slider__item > div.bt-fl-slider__item--container > div.bt-card-teaser > a.bt-card-teaser__item
Kinderseite kuppelkucker.de div.bt-fl-slider__item > div.bt-fl-slider__item--container > div.bt-card-teaser > a.bt-card-teaser__item
Wochenzeitung das-parlament.de div.bt-fl-slider__item > div.bt-fl-slider__item--container > div.bt-card-teaser > a.bt-card-teaser__item
○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
●`[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
●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
●Definition list items are wrapped in `<dl>` elements
●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
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
●Heading elements appear in a sequentially-descending order
●`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●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.
○`[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 an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○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.
○`<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
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
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.

Deprecation / WarningSource
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
www.bundestag.de/resource/themes/bundestag/js/jquery.min-826978-30.js line 20, col 79109

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
www.bundestag.de/resource/themes/bundestag/js/vue-859624-56.js
www.bundestag.de/resource/themes/bundestag/js/libs_wojq-596282-119.js
●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 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`

Send Feedback