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.

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.

Request	Cache TTL	Transfer Size
www.kuleuven.be/kuleuven/images/eredoc-fsw-1.png/@@images/image/large	3600.0 s	523.5 KiB
/++webresource++63cfd711-b569-56e9-9ddd-422f58e3d9c3/++pl...	900.0 s	134.9 KiB
/kuleuven/images/impressie-van-einsteintelescoop.jpg/@@im...	3600.0 s	121.8 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	108.8 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/kuleuven/images/ku-leuven-inside-bananen.jpeg/@@images/i...	3600.0 s	80.2 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	66.1 KiB
cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js	86400.0 s	120.9 KiB
/++webresource++810d3812-c90d-5229-bae6-c1524189a73d/++th...	900.0 s	43.9 KiB
/signals/config/975733057666998?v=2.9.303&r=stable&domain...	1200.0 s	44.4 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	27.6 KiB
/++webresource++09e0b31e-300a-599a-a589-ae4f34b73627/++pl...	900.0 s	17.0 KiB
/++webresource++d5804eac-48ee-5c69-8389-75ac65829cb3/++pl...	900.0 s	15.7 KiB
/++webresource++9ff7b2fc-bb60-5b7e-a094-49a1fe46d833/++pl...	900.0 s	10.6 KiB
/++webresource++43a69a20-361e-50af-abb1-f4296d386cc5/++re...	900.0 s	10.4 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	8.5 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	7.4 KiB
/++webresource++9632347a-86f7-5a0b-b950-5e96d3f3f53a/++re...	900.0 s	4.6 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
/++webresource++96c3556c-9d70-5d58-951a-ff5109db53b8/++pl...	900.0 s	2.5 KiB
/++webresource++6b561814-6710-588e-97de-39bd8c949a5b/++re...	900.0 s	2.4 KiB
www.kuleuven.be/++theme++ku-leuven-theme/js/wmsjs.js	3600.0 s	2.7 KiB
/++webresource++688bdb99-253c-5b8b-bd8b-90f9b92d6ab0/++pl...	900.0 s	2.2 KiB
/++webresource++8b0aff1f-678f-5b2f-9281-18c72aeca304/++pl...	900.0 s	2.0 KiB
/++webresource++d8447c31-cb62-5e50-b3f2-90af0e386241/++re...	900.0 s	2.0 KiB
stijl.kuleuven.be/releases/latest/img/svg/logo.svg	0.0 ms	1.6 KiB
/++webresource++87d24f12-da88-5fca-8657-21c181543c6b/++re...	900.0 s	1.7 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	900.0 s	1.6 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg	86400.0 s	2.6 KiB
cdn.cookielaw.org/consent/a8db6e5f-20c8-46f0-86d7-2835a0229013/OtAutoBlock.js	86400.0 s	2.5 KiB
/++webresource++b6e63fde-4269-5984-a67a-480840700e9a/++re...	900.0 s	1.1 KiB
/++webresource++ac83a459-aa2c-5a45-80a9-9d3e95ae0847/++pl...	900.0 s	1.1 KiB
/++webresource++6aa4c841-faf5-51e8-8109-90bd97e7aa07/++pl...	900.0 s	1.0 KiB
www.kuleuven.be/++webresource++a8d7d061-4424-5b11-b08d-82386b148812/@@custom.css	120.0 s	837 B
/logos/830e2552-53d9-4d73-abd1-47ef1b4dcd83/24fcc2ab-887e...	86400.0 s	878 B
/tr/?id=975733057666998&ev=PageView&dl=https%3A%2F%2Fwww....	0.0 ms	19 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:2.595 source:map[column:27131 line:17 type:source-location url:https://www.kuleuven.be/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++plone++static/bundle-plone/bundle.min.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:93.29 source:map[type:text value:[unattributed]]] map[reflowTime:2.096 source:map[column:50126 line:16 type:source-location url:https://www.kuleuven.be/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++plone++static/bundle-plone/bundle.min.js urlProvider:network]] map[reflowTime:0.254 source:map[column:50184 line:16 type:source-location url:https://www.kuleuven.be/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++plone++static/bundle-plone/bundle.min.js urlProvider:network]] map[reflowTime:0.245 source:map[column:50248 line:16 type:source-location url:https://www.kuleuven.be/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++plone++static/bundle-plone/bundle.min.js 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:1425.591 label:Time to first byte subpart:timeToFirstByte] map[duration:1499.906 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-P

nodeLabel: KU Leuven is een internationale community waar innovatief onderzoek aan de basi…

path: 1,HTML,1,BODY,1,DIV,5,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,P

selector: div.col-xs-12 > div.card > div.card-body > p

snippet: <p>

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

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
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	108.8 KiB	2.9 s
stijl.kuleuven.be/releases/3.3.0/css/wms.css	37.3 KiB	2.6 s
/++webresource++810d3812-c90d-5229-bae6-c1524189a73d/++th...	43.9 KiB	2.3 s
/++webresource++6b561814-6710-588e-97de-39bd8c949a5b/++re...	2.4 KiB	299 ms
/++webresource++43a69a20-361e-50af-abb1-f4296d386cc5/++re...	10.4 KiB	763 ms
/++webresource++9632347a-86f7-5a0b-b950-5e96d3f3f53a/++re...	4.6 KiB	454 ms
/++webresource++6aa4c841-faf5-51e8-8109-90bd97e7aa07/++pl...	1.0 KiB	299 ms
www.kuleuven.be/++webresource++a8d7d061-4424-5b11-b08d-82386b148812/@@custom.css	837 B	299 ms
/++webresource++8b0aff1f-678f-5b2f-9281-18c72aeca304/++pl...	2.0 KiB	299 ms
/++webresource++ac83a459-aa2c-5a45-80a9-9d3e95ae0847/++pl...	1.1 KiB	299 ms
/++webresource++688bdb99-253c-5b8b-bd8b-90f9b92d6ab0/++pl...	2.2 KiB	608 ms
/++webresource++96c3556c-9d70-5d58-951a-ff5109db53b8/++pl...	2.5 KiB	608 ms
/++webresource++d5804eac-48ee-5c69-8389-75ac65829cb3/++pl...	15.7 KiB	1.4 s
/++webresource++b6e63fde-4269-5984-a67a-480840700e9a/++re...	1.1 KiB	608 ms
/++webresource++87d24f12-da88-5fca-8657-21c181543c6b/++re...	1.7 KiB	608 ms
/++webresource++d8447c31-cb62-5e50-b3f2-90af0e386241/++re...	2.0 KiB	299 ms
/css2?family=Material+Icons&family=Source+Sans+Pro:ital,w...	2.0 KiB	818 ms
cdn.cookielaw.org/consent/a8db6e5f-20c8-46f0-86d7-2835a0229013/OtAutoBlock.js	2.5 KiB	778 ms
cdn.cookielaw.org/scripttemplates/otSDKStub.js	9.1 KiB	615 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
`div.row > div.col-xs-12 > div.kul-card-image > div.card-img-left`	www.kuleuven.be/kuleuven/images/eredoc-fsw-1.png/@@images/image/large	522.9 KiB	444.7 KiB
`section#section-text > div#parent-fieldname-text > div.kul-card-image > div.card-img-left`	/kuleuven/images/ku-leuven-inside-bananen.jpeg/@@images/i...	79.6 KiB	10.3 KiB

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.kuleuven.be/kuleuven/	http/1.1
/++webresource++d8447c31-cb62-5e50-b3f2-90af0e386241/++re...	http/1.1
/++webresource++87d24f12-da88-5fca-8657-21c181543c6b/++re...	http/1.1
/++webresource++b6e63fde-4269-5984-a67a-480840700e9a/++re...	http/1.1
/++webresource++d5804eac-48ee-5c69-8389-75ac65829cb3/++pl...	http/1.1
/++webresource++96c3556c-9d70-5d58-951a-ff5109db53b8/++pl...	http/1.1
/++webresource++688bdb99-253c-5b8b-bd8b-90f9b92d6ab0/++pl...	http/1.1
/++webresource++8b0aff1f-678f-5b2f-9281-18c72aeca304/++pl...	http/1.1
/++webresource++810d3812-c90d-5229-bae6-c1524189a73d/++th...	http/1.1
/++webresource++ac83a459-aa2c-5a45-80a9-9d3e95ae0847/++pl...	http/1.1
www.kuleuven.be/++webresource++a8d7d061-4424-5b11-b08d-82386b148812/@@custom.css	http/1.1
/++webresource++6aa4c841-faf5-51e8-8109-90bd97e7aa07/++pl...	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/++webresource++63cfd711-b569-56e9-9ddd-422f58e3d9c3/++pl...	http/1.1
/++webresource++09e0b31e-300a-599a-a589-ae4f34b73627/++pl...	http/1.1
/++webresource++9ff7b2fc-bb60-5b7e-a094-49a1fe46d833/++pl...	http/1.1
/++webresource++9632347a-86f7-5a0b-b950-5e96d3f3f53a/++re...	http/1.1
/++webresource++43a69a20-361e-50af-abb1-f4296d386cc5/++re...	http/1.1
/++webresource++6b561814-6710-588e-97de-39bd8c949a5b/++re...	http/1.1
www.kuleuven.be/++theme++ku-leuven-theme/js/wmsjs.js	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	http/1.1
/kuleuven/images/impressie-van-einsteintelescoop.jpg/@@im...	http/1.1
/kuleuven/images/ku-leuven-inside-bananen.jpeg/@@images/i...	http/1.1
www.kuleuven.be/kuleuven/images/eredoc-fsw-1.png/@@images/image/large	http/1.1
www.kuleuven.be/plonejsi18n?domain=widgets&language=nl	http/1.1

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

URL	Time Spent
kuleuven.be/	1.2 s
www.kuleuven.be/	1.2 s
www.kuleuven.be/kuleuven/	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

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

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: 490 ms 103.6 KiB

URL	Transfer Size	Est Savings
/++webresource++810d3812-c90d-5229-bae6-c1524189a73d/++th...	43.2 KiB	41.1 KiB
stijl.kuleuven.be/releases/3.3.0/css/wms.css	36.5 KiB	31.8 KiB
	18.4 KiB	15.7 KiB
/++webresource++d5804eac-48ee-5c69-8389-75ac65829cb3/++pl...	14.9 KiB	14.9 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: 340 ms 475.8 KiB

URL	Transfer Size	Est Savings
/++webresource++63cfd711-b569-56e9-9ddd-422f58e3d9c3/++pl...	133.8 KiB	121.3 KiB
cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js	120.7 KiB	64.8 KiB
www.googletagmanager.com/gtag/js?id=DC-8256385&cx=c&gtm=4e64h1	129.4 KiB	63.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-K6Q2R6	169.5 KiB	63.5 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	65.3 KiB	53.6 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	108.0 KiB	48.4 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	33.6 KiB
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	26.9 KiB	26.8 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.kuleuven.be/kuleuven/	614 ms	11 ms	7.3 ms
www.googletagmanager.com/gtm.js?id=GTM-K6Q2R6	556 ms	491 ms	55 ms
Unattributable	459 ms	15 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=DC-8256385&cx=c&gtm=4e64h1	319 ms	248 ms	57 ms
cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js	309 ms	174 ms	57 ms
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	223 ms	140 ms	68 ms
connect.facebook.net/en_US/fbevents.js	186 ms	153 ms	30 ms
/signals/config/975733057666998?v=2.9.303&r=stable&domain...	178 ms	133 ms	43 ms
/++webresource++63cfd711-b569-56e9-9ddd-422f58e3d9c3/++pl...	156 ms	87 ms	55 ms
/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl...	92 ms	76 ms	11 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.

Category	Time Spent
Script Evaluation	1.6 s
Other	683 ms
Style & Layout	469 ms
Script Parsing & Compilation	441 ms
Parse HTML & CSS	134 ms
Rendering	65 ms
Garbage Collection	32 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
The page has an unload handler in the main frame.	Actionable

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 4.5 KiB

URL	Transfer Size	Est Savings
/++webresource++43a69a20-361e-50af-abb1-f4296d386cc5/++re...	9.6 KiB	4.5 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
logo-kuleuven `div.container > div.logoblock > a.navbar-brand > img`	stijl.kuleuven.be/releases/latest/img/svg/logo.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Optimize viewport for mobile

●Minify CSS

●Avoids enormous network payloads Total size was 2,086 KiB

●Avoid long main-thread tasks 16 long tasks found

●Network Requests

●Network Round Trip Times 140 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 150 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

○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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Cookiebeleid `div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text > a.ot-cookie-policy-link`
Cookie-instellingen `div.ot-sdk-row > div#onetrust-button-group-parent > div#onetrust-button-group > button#onetrust-pc-btn-handler`
Enkel strikt noodzakelijke cookies `div#onetrust-button-group-parent > div#onetrust-button-group > div.banner-actions-container > button#onetrust-reject-all-handler`
Alle cookies toestaan `div#onetrust-button-group-parent > div#onetrust-button-group > div.banner-actions-container > button#onetrust-accept-btn-handler`

These are opportunities to improve the legibility of your content.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nav.navbar > div.container > div.controls > a.btn-toggle `nav.navbar > div.container > div.controls > a.btn-toggle`

These are opportunities to improve the semantics of the controls in your application. This 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
Cookiebeleid `div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text > a.ot-cookie-policy-link`

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

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

●Elements use only permitted ARIA attributes

●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.

●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

●`<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

●Uses ARIA roles only on compatible elements

○`[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

○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

○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>`.

○All heading elements contain content.

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○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.

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 / Warning	Source
Unload event listeners are deprecated and will be removed.	/++webresource++74456754-c4ae-5e78-b089-c480f83eb0c7/++pl... line 16, col 38281
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

●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

●Page has valid source maps

○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`