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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.

41

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.destatis.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=59600.0 s893.3 KiB
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/lwr.jpg?__blob=normal&v=160.0 s119.2 KiB
/DE/Home/_documents/_aktuelles/Bilder/icon-dashboard.jpg?...60.0 s101.5 KiB
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/rente.jpg?__blob=normal&v=260.0 s93.3 KiB
/DE/Service/Statistik-Campus/_Bilder/esc-kachel-allgemein...60.0 s84.8 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/sprite.svg?__blob=normal&v=3786400.0 s206.4 KiB
/DE/Home/_documents/_aktuelles/Bilder/durchschnittsmensch...60.0 s60.6 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Book.woff21800.0 s47.9 KiB
www.destatis.de/DE/Methoden/Bilder/wista-logo.png?__blob=normal&v=260.0 s39.0 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Italic.woff21800.0 s39.4 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Bold.woff21800.0 s38.4 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Medium.woff21800.0 s38.3 KiB
www.destatis.de/static/fonts/statissans/StatisSans-SemiBold.woff21800.0 s38.3 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Light.woff21800.0 s38.1 KiB
www.destatis.de/static/fonts/statissans/StatisSans-Regular.woff21800.0 s37.1 KiB
www.destatis.de/SharedDocs/Bilder/DE/Allgemein/Logo-WISTA.png?__blob=normal&v=186400.0 s75.4 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/small.css?v=10386400.0 s41.6 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/_libs.css?v=260.0 s15.8 KiB
www.destatis.de/DE/Home/Bilder/standardkachel-ankuendigung.svg?__blob=normal&v=260.0 s11.0 KiB
www.destatis.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal&v=1186400.0 s23.9 KiB
www.destatis.de/DE/Home/Bilder/standardkachel-aktuell.png?__blob=normal&v=460.0 s8.4 KiB
/SharedDocs/Bilder/DE/Allgemein/bsp_bild_thema1.png?__blo...86400.0 s17.0 KiB
www.destatis.de/DE/Home/Bilder/kachelbild-im-fokus-rot.png?__blob=normal&v=660.0 s6.7 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/large.css?v=7886400.0 s14.1 KiB
/DE/Home/_documents/_aktuelles/Bilder/neu-blau-dunkel-neg...60.0 s4.2 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/medium.css?v=6686400.0 s9.4 KiB
/SiteGlobals/Forms/_components/Buttons/Submit_blau.svg?__...60.0 s3.0 KiB
/SiteGlobals/Forms/_components/Buttons/Submit_weiss.svg?_...60.0 s3.0 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/addon_print.css?v=1586400.0 s6.7 KiB
/SiteGlobals/Frontend/Images/icons/slick/icon_ajax_loader...86400.0 s6.4 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/custom.css?v=7086400.0 s4.6 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/mail.svg?__blob=normal&v=786400.0 s3.4 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/normalize.css?v=386400.0 s3.3 KiB
/SiteGlobals/Frontend/Images/icons/logo-partial.png?__blo...86400.0 s3.3 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/linkedin.svg?__blob=normal&v=786400.0 s3.1 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/to-top.svg?__blob=normal&v=986400.0 s3.0 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/facebook.svg?__blob=normal&v=886400.0 s3.0 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/twitter.svg?__blob=normal&v=886400.0 s2.9 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/custom_destatis.css?v=4386400.0 s2.9 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/close.svg?__blob=normal&v=786400.0 s2.8 KiB
www.destatis.de/SiteGlobals/Frontend/Images/icons/achtung.svg?__blob=normal&v=586400.0 s2.7 KiB
www.destatis.de/SiteGlobals/Frontend/Styles/custom_xmas.css?v=286400.0 s2.6 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:0.143692] map[node:map[boundingRect:map[bottom:705 height:453 left:0 right:412 top:252 width:412] lhId:page-1-DIV nodeLabel:Statistisches Bundesamt Suche Suchbegriff eingeben OFT GESUCHT Inflation Verdie… path:1,HTML,1,BODY,3,DIV,0,DIV,1,DIV,2,DIV selector:div#wrapperOuter > div.wrapperInner > div#wrapperDivisions > div.c-stage-search snippet:<div class="c-stage-search"> type:node] score:0.143692]]

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:117.918 source:map[type:text value:[unattributed]]]]

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:2013.604 label:Time to first byte subpart:timeToFirstByte] map[duration:31074.121 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-H1
nodeLabel: Einwilligung zur Verwendung von Cookies und ähnlichen Technologien
path: 1,HTML,1,BODY,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,H1
selector: div.row > div.column > div.cookiebanner-section > h1#_q8nux7ork
snippet: <h1 id="_q8nux7ork">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
/DE/Home/_documents/_aktuelles/Bilder/icon-dashboard.jpg?...99.1 KiB81.9 KiB
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/lwr.jpg?__blob=normal&v=1116.8 KiB78.0 KiB
WISTA li.c-teaser-linklist__item > a.c-teaser-link > span.c-teaser-link__icon > img
www.destatis.de/SharedDocs/Bilder/DE/Allgemein/Logo-WISTA.png?__blob=normal&v=173.0 KiB72.6 KiB
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/rente.jpg?__blob=normal&v=290.9 KiB54.1 KiB
Schriftzug "Europäischer Statistikwettbewerb für Schülerinnen und Schüler" mit … div.column > div.c-card__image > picture > img
/DE/Service/Statistik-Campus/_Bilder/esc-kachel-allgemein...82.5 KiB49.1 KiB
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
/DE/Home/_documents/_aktuelles/Bilder/durchschnittsmensch...58.2 KiB48.1 KiB
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Methoden/Bilder/wista-logo.png?__blob=normal&v=236.7 KiB33.0 KiB

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.3 s

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
Statistisches Bundesamt Suche Suchbegriff eingeben OFT GESUCHT Inflation Verdie… div#wrapperOuter > div.wrapperInner > div#wrapperDivisions > div.c-stage-search
0.144

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

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: 750 ms 150.7 KiB
URLTransfer SizeEst Savings
www.destatis.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=59891.0 KiB150.7 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.

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: 2.9 s 583.7 KiB
URLTransfer SizeEst Savings
www.destatis.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=59889.8 KiB583.7 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
Style & Layout810 ms
Script Evaluation789 ms
Other693 ms
Script Parsing & Compilation444 ms
Rendering159 ms
Parse HTML & CSS120 ms
Garbage Collection73 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
WISTA li.c-teaser-linklist__item > a.c-teaser-link > span.c-teaser-link__icon > img
www.destatis.de/SharedDocs/Bilder/DE/Allgemein/Logo-WISTA.png?__blob=normal&v=1
Logo: Destatis Statistisches Bundesamt div.row > div.column > span.logo > img
www.destatis.de/SiteGlobals/Frontend/Images/logo.svg?__blob=normal&v=11
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/Bilder/standardkachel-ankuendigung.svg?__blob=normal&v=2
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/Bilder/standardkachel-aktuell.png?__blob=normal&v=4
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Methoden/Bilder/wista-logo.png?__blob=normal&v=2
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/Bilder/kachelbild-im-fokus-rot.png?__blob=normal&v=6
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/lwr.jpg?__blob=normal&v=1
Schriftzug "Europäischer Statistikwettbewerb für Schülerinnen und Schüler" mit … div.column > div.c-card__image > picture > img
/DE/Service/Statistik-Campus/_Bilder/esc-kachel-allgemein...
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
www.destatis.de/DE/Home/_documents/_aktuelles/Bilder/rente.jpg?__blob=normal&v=2
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
/DE/Home/_documents/_aktuelles/Bilder/neu-blau-dunkel-neg...
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
/DE/Home/_documents/_aktuelles/Bilder/icon-dashboard.jpg?...
div.column > div.c-card__image > picture > img div.column > div.c-card__image > picture > img
/DE/Home/_documents/_aktuelles/Bilder/durchschnittsmensch...
div.c-alert > div.c-alert__box > div.c-alert__icon > img div.c-alert > div.c-alert__box > div.c-alert__icon > img
www.destatis.de/SiteGlobals/Frontend/Images/icons/achtung.svg?__blob=normal&v=5
div.row > div.column > p > img div.row > div.column > p > img
/SiteGlobals/Frontend/Images/icons/logo-partial.png?__blo...

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

●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoids enormous network payloads Total size was 2,196 KiB
●JavaScript execution time 1.2 s
●Avoid long main-thread tasks 7 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 200 ms
●Server Backend Latencies 200 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 390 ms
○INP breakdown
○LCP request discovery
○User Timing marks and measures
○Avoid non-composited animations
95

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.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

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
●Form elements have associated labels
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●All heading elements contain content.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements 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
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Image elements have `[alt]` attributes
○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.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○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.
96

Best Practices

General

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
Failed to load resource: net::ERR_TIMED_OUT

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.

●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 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
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○Image elements have `[alt]` attributes

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