Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

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:0.10142000000000001] map[node:map[boundingRect:map[bottom:586 height:100 left:16 right:396 top:485 width:380] lhId:page-3-HGROUP nodeLabel:Pressemitteilung Luftverkehr Terminal 3 am Frankfurter Flughafen eröffnet path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,1,HGROUP selector:a.teaser--area-link > div.media-teaser__tp_press > div.paragraph > hgroup snippet:<hgroup> type:node] score:0.101261 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:445 height:214 left:16 right:396 top:231 width:380] lhId:page-0-IMG nodeLabel:Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur Land… path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,DIV,0,DIV,0,DIV,0,PICTURE,4,IMG selector:div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img snippet:<img loading="eager" width="480" height="270" class="mediabox-img img-fluid lazyautosizes lazyloaded" data-sizes="auto" alt="Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur…" data-src="/sites/hessen.hessen.de/files/styles/crop_image_style_16_9_xs/public/2022-…" typeof="foaf:Image" sizes="380px" src="https://hessen.de/sites/hessen.hessen.de/files/styles/crop_image_style_16_…"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:524 height:39 left:154 right:293 top:485 width:138] lhId:page-1-P nodeLabel:Luftverkehr path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,1,HGROUP,0,DIV,1,P selector:div.paragraph > hgroup > div.row > p.teaser-generic__field-pt-dateline snippet:<p class="teaser-generic__field-pt-dateline topline-title topline mb-0"> type:node] score:8.7e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:445 height:214 left:16 right:396 top:231 width:380] lhId:page-0-IMG nodeLabel:Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur Land… path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,DIV,0,DIV,0,DIV,0,PICTURE,4,IMG selector:div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img snippet:<img loading="eager" width="480" height="270" class="mediabox-img img-fluid lazyautosizes lazyloaded" data-sizes="auto" alt="Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur…" data-src="/sites/hessen.hessen.de/files/styles/crop_image_style_16_9_xs/public/2022-…" typeof="foaf:Image" sizes="380px" src="https://hessen.de/sites/hessen.hessen.de/files/styles/crop_image_style_16_…"> type:node]] map[cause:Web font extra:map[type:url value:https://hessen.de/themes/custom/hw_radix_standard/assets/fonts/Gellix/HessenGellix-Bold.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:207 height:50 left:178 right:282 top:157 width:104] lhId:page-2-LI nodeLabel:Für Kinder path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,0,ASIDE,0,DIV,0,DIV,0,DIV,2,DIV,0,NAV,0,UL,1,LI selector:div.block > nav.navbar__focus > ul.nav > li#menu--307 snippet:<li id="menu--307" class="nav-item level-0 "> type:node] score:7.2e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:445 height:214 left:16 right:396 top:231 width:380] lhId:page-0-IMG nodeLabel:Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur Land… path:1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,DIV,0,DIV,0,DIV,0,PICTURE,4,IMG selector:div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img snippet:<img loading="eager" width="480" height="270" class="mediabox-img img-fluid lazyautosizes lazyloaded" data-sizes="auto" alt="Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur…" data-src="/sites/hessen.hessen.de/files/styles/crop_image_style_16_9_xs/public/2022-…" typeof="foaf:Image" sizes="380px" src="https://hessen.de/sites/hessen.hessen.de/files/styles/crop_image_style_16_…"> type:node]] map[cause:Web font extra:map[type:url value:https://hessen.de/themes/custom/hw_radix_standard/assets/fonts/Gellix/HessenGellix-Medium.woff2]]] 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.

URL	Est Savings
/themes/custom/hw_radix_standard/assets/fonts/Gellix/Hess...	295 ms
/themes/custom/hw_radix_standard/assets/fonts/Gellix/Hess...	195 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:47.953 source:map[column:27323 line:3 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 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:0.391 source:map[column:85537 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]] map[reflowTime:25.391 source:map[column:49615 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]] map[reflowTime:0.748 source:map[column:51395 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]] map[reflowTime:0.214 source:map[column:52814 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]] map[reflowTime:15.746 source:map[column:49637 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]] map[reflowTime:5.463 source:map[column:54434 line:2 type:source-location url:https://hessen.de/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9pSS_vUf_XEAG7Y4oMEZVGE.js?scope=footer&delta=0&language=de&theme=hw_radix_standard&include=eJxtjeEOgyAQg18I5ZHIKceGOw89QMSnF5JlyRL_tE2_NIWJcCOoKBp-Uc1BUFvJG9AIc_IHDuT5898vcKp3MQLWnyYmYAti9bJnlPoA1mBR2F_ywGKqhL1Pxb-My9w-A8e2OdC0IVCHBScXZNVfH50ETorgqrrLDbb-UA0 urlProvider:network]]]

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:808.208 label:Time to first byte subpart:timeToFirstByte] map[duration:1273.647 label:Resource load delay subpart:resourceLoadDelay] map[duration:199.943 label:Resource load duration subpart:resourceLoadDuration] map[duration:334.557 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur Land…

path: 1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,MAIN,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,A,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,DIV,0,DIV,0,DIV,0,PICTURE,4,IMG

selector: div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img

snippet: <img loading="eager" width="480" height="270" class="mediabox-img img-fluid lazyautosizes lazyloaded" data-sizes="auto" alt="Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur…" data-src="/sites/hessen.hessen.de/files/styles/crop_image_style_16_9_xs/public/2022-…" typeof="foaf:Image" sizes="380px" src="https://hessen.de/sites/hessen.hessen.de/files/styles/crop_image_style_16_…">

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: Ein Flugzeug setzt in der Abenddämmerung auf dem Frankfurter Flughafen zur Land…

selector: div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img

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.

URL	Transfer Size	Duration
/themes/custom/hw_radix_standard/src/js/modernizr/moderni...	5.3 KiB	150 ms
/sites/hessen.hessen.de/files/css/css_4kaKC-tElTWLh2kTcSY...	57.2 KiB	300 ms
/sites/hessen.hessen.de/files/css/css_zG5rxLGPbDE_c-uuXSf...	3.2 KiB
hessen.de/modules/modified/ableplayer/css/ableplayer.override.min.css?td50er	3.2 KiB
/sites/hessen.hessen.de/files/css/css_ZV-Xtyg3rz4xDPWIbh9...	5.7 KiB

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.

	URL	Resource Size	Est Savings
Zehn Personen stehen in einer Industriehalle. Drei Personen, darunter auch Mini… `div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img`	/sites/hessen.hessen.de/files/styles/crop_image_style_16_...	88.8 KiB	58.4 KiB
Drei Männer und eine Frau sitzen an einem Tisch und unterhalten sich. `div.mediabox-wrapper > div.mediabox > picture > img.mediabox-img`	/sites/hessen.hessen.de/files/styles/crop_image_style_16_...	37.2 KiB	6.9 KiB

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
Pressemitteilung Luftverkehr Terminal 3 am Frankfurter Flughafen eröffnet `a.teaser--area-link > div.media-teaser__tp_press > div.paragraph > hgroup`	0.101
Luftverkehr `div.paragraph > hgroup > div.row > p.teaser-generic__field-pt-dateline`	0.000
Für Kinder `div.block > nav.navbar__focus > ul.nav > li#menu--307`	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 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: 300 ms 53.8 KiB

URL	Transfer Size	Est Savings
/sites/hessen.hessen.de/files/css/css_4kaKC-tElTWLh2kTcSY...	56.7 KiB	53.8 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: 750 ms 129.6 KiB

URL	Transfer Size	Est Savings
hessen.de/modules/modified/ableplayer/js/ableplayer.min.js?v=4.3.0	69.0 KiB	62.5 KiB
/sites/hessen.hessen.de/files/js/js_fBEatPPlVPjthOUL3UeIF...	54.1 KiB	41.1 KiB
/sites/hessen.hessen.de/files/js/js_23C6rCik89zZlpw-njmO9...	52.6 KiB	26.0 KiB

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Style & Layout	638 ms
Other	617 ms
Script Evaluation	434 ms
Parse HTML & CSS	148 ms
Rendering	146 ms
Script Parsing & Compilation	89 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
Hessisches Hoheitszeichen `div.row > div.footer__branding > div.footer-brand > img.img`	hessen.de/sites/hessen.hessen.de/files/hessen_logo-footer.svg

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

●Max Potential First Input Delay 110 ms

●Use efficient cache lifetimes

●Document request latency

●Optimize DOM size

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 817 KiB

●JavaScript execution time 0.5 s

●Avoid long main-thread tasks 8 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 190 ms

●Server Backend Latencies 0 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 190 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Social Media Kanäle @hessen.de auf Facebook Öffnet sich in einem neuen Fenster … `div.field__item > div.paragraph > div.paragraphs-library-item__paragraphs > article.paragraph`

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

●`[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.

●`button`, `link`, and `menuitem` elements have accessible names

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●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

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○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.

○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

○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.

○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

●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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○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`