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

Audit breakdown by category with detailed findings.

54

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
/globalassets/restricted/media/homepage/flood-sensing-ban...14400.0 s59.8 MiB
/signals/config/408175844597144?v=2.9.303&r=stable&domain...1200.0 s127.0 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
/cdn-cgi/image/width=1512,format=auto,fit=crop,height=151...41798.0 s166.1 KiB
www.uts.edu.au/dist/css/index.css14400.0 s81.0 KiB
js.monitor.azure.com/scripts/b/ai.2.gbl.min.js1800.0 s46.2 KiB
/globalassets/restricted/media/homepage/flood-sensing-ban...14400.0 s38.2 KiB
/fonts/nb-international-pro/nb_international_pro_regular-...14400.0 s37.8 KiB
/fonts/nb-international-pro/nb_international_pro_bold-web...14400.0 s37.3 KiB
www.uts.edu.au/fonts/tiempos-headline/tiempos-headline-medium.woff214400.0 s33.5 KiB
www.uts.edu.au/dist/assets/js/Block/AnchorNavigation/Block__AnchorNavigation.js14400.0 s31.3 KiB
www.uts.edu.au/fonts/nb-akademie/nb_akademie_regular-webfont.woff214400.0 s29.9 KiB
www.uts.edu.au/fonts/nb-akademie/nb_akademie_bold-webfont.woff214400.0 s29.8 KiB
www.uts.edu.au/dist/assets/js/Element/Carousel/Element__Carousel.js14400.0 s29.2 KiB
js.adsrvr.org/up_loader.1.1.0.js0.0 ms12.3 KiB
www.uts.edu.au/dist/assets/js/Block/EmbeddedVideo/Block__EmbeddedVideo.js14400.0 s17.2 KiB
siteimproveanalytics.com/js/siteanalyze_78831.js86400.0 s19.9 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
static.hotjar.com/c/hotjar-3470715.js?sv=760.0 s6.2 KiB
www.uts.edu.au/dist/assets/js/Search/SearchPrompt/SearchPrompt.js14400.0 s8.5 KiB
s.go-mpulse.net/boomerang/4XCE6-HGT9U-NTRWU-AJRXT-PMALV604800.0 s56.1 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...14400.0 s6.5 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...14400.0 s5.9 KiB
www.uts.edu.au/dist/assets/js/Search/InlineSearchPrompt/InlineSearchPrompt.js14400.0 s4.0 KiB
/dist/assets/js/Block/FeatureHeaderBannerV2/Block__Featur...14400.0 s4.0 KiB
/dist/assets/js/Block/FeatureHeaderBanner/Block__FeatureH...14400.0 s3.4 KiB
www.uts.edu.au/Util/Find/epi-util/find.js14400.0 s3.0 KiB
www.uts.edu.au/dist/assets/js/global.js14400.0 s2.7 KiB
www.uts.edu.au/dist/assets/js/Block/GlobalHeader/Block__GlobalHeader.js14400.0 s2.7 KiB
/1593893/trc/3/json?tim=1776893813026&data=%7B%22id%22%3A...0.0 ms1.8 KiB
www.uts.edu.au/dist/assets/js/Block/HomepageHeader/Block__HomepageHeader.js14400.0 s2.6 KiB
www.uts.edu.au/dist/assets/js/Block/GlobalNavigation/Block__GlobalNavigation.js14400.0 s2.6 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...21070.0 s2.6 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...39976.0 s3.1 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...42992.0 s2.9 KiB
/globalassets/restricted/media/all-pages-sitewide/header/...14400.0 s1.9 KiB
www.uts.edu.au/dist/assets/js/Block/LogoGrid/Block__LogoGrid.js14400.0 s1.9 KiB
www.uts.edu.au/dist/assets/js/Block/StickyCta/Block__StickyCta.js14400.0 s1.9 KiB
/dist/assets/js/Block/ListingGridBackground/Block__Listin...14400.0 s1.9 KiB
www.uts.edu.au/dist/assets/js/Block/MasonryGrid/Block__MasonryGrid.js14400.0 s1.8 KiB
www.uts.edu.au/dist/assets/js/Block/RelatedContent/Block__RelatedContent.js14400.0 s1.7 KiB
www.uts.edu.au/dist/assets/js/Element/DropdownMenu/Element__DropdownMenu.js14400.0 s1.7 KiB
www.uts.edu.au/dist/assets/js/Block/ExploreHub/Block__ExploreHub.js14400.0 s1.7 KiB
/dist/assets/js/Element/DecorativeVideoPlayer/Element__De...14400.0 s1.6 KiB
/dist/assets/js/Block/ScrollImageAndText/Block__ScrollIma...14400.0 s1.5 KiB
www.uts.edu.au/static/css/materialicons.css14400.0 s1.5 KiB
www.uts.edu.au/dist/assets/js/Block/Testimonial/Block__Testimonial.js14400.0 s1.4 KiB
www.uts.edu.au/dist/assets/js/Block/AnimatedPng/Block__AnimatedPng.js14400.0 s1.4 KiB
/dist/assets/js/Block/SubjectListingTable/Block__SubjectL...14400.0 s1.4 KiB
www.uts.edu.au/dist/assets/js/Block/SocialShare/Block__SocialShare.js14400.0 s1.4 KiB
www.uts.edu.au/dist/assets/js/Block/KeyFacts/Block__KeyFacts.js14400.0 s1.4 KiB
js.adsrvr.org/universal_pixel.js0.0 ms958 B
www.uts.edu.au/dist/assets/js/Block/Accordion/Block__Accordion.js14400.0 s1.4 KiB
www.uts.edu.au/dist/assets/js/Element/Tooltip/Element__Tooltip.js14400.0 s1.4 KiB
/dist/assets/js/Block/SecondaryNavigation/Block__Secondar...14400.0 s1.3 KiB
/dist/assets/js/Block/ScrollingFeatureHeader/Block__Scrol...14400.0 s1.3 KiB
/dist/assets/js/Block/InteractiveStudyAreas/Block__Intera...14400.0 s1.3 KiB
www.uts.edu.au/dist/assets/js/Block/FeatureGrid/Block__FeatureGrid.js14400.0 s1.3 KiB
www.uts.edu.au/dist/assets/js/Block/FeatureContent/Block__FeatureContent.js14400.0 s1.3 KiB
/dist/assets/js/Block/AcademicProfileCarousel/Block__Acad...14400.0 s1.3 KiB
/globalassets/restricted/media/all-pages-sitewide/header/...41280.0 s1.7 KiB
/dist/assets/js/Block/SkipToMainContent/Block__SkipToMain...14400.0 s1.3 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...14400.0 s1.3 KiB
www.uts.edu.au/dist/assets/js/Block/CookieBlock/Block__CookieBlock.js14400.0 s1.3 KiB
www.uts.edu.au/dist/assets/js/Block/Footer/Block__Footer.js14400.0 s1.2 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...39976.0 s1.5 KiB
www.uts.edu.au/dist/assets/js/Block/EmergencyBanner/Block__EmergencyBanner.js14400.0 s1.1 KiB
www.uts.edu.au/dist/assets/js/Block/Statistic/Block__Statistic.js14400.0 s1.1 KiB
/globalassets/restricted/media/all-pages-sitewide/footer/...37754.0 s1.4 KiB
www.uts.edu.au/dist/assets/js/Block/CtaPopUp/Block__CtaPopUp.js14400.0 s1.0 KiB
/dist/assets/js/Block/ListingGridWithBackgroundCol2/Block...14400.0 s1.0 KiB
/collect?v=2&fmt=js&pid=64238&time=1776893813073&url=http...0.0 ms693 B
www.uts.edu.au/dist/assets/js/Block/Breadcrumb/Block__Breadcrumb.js14400.0 s991 B
www.uts.edu.au/dist/assets/js/Block/ListingGrid/Block__ListingGrid.js14400.0 s981 B
www.uts.edu.au/dist/assets/js/Element/Picture/Element__Picture.js14400.0 s866 B
www.uts.edu.au/dist/assets/js/Block/CtaForm/Block__CtaForm.js14400.0 s820 B
/dist/assets/js/Block/FiftyFiftyContent/Block__FiftyFifty...14400.0 s820 B
static.doubleclick.net/instream/ad_status.js900.0 s495 B
/_/set_cookie?val=a2rcDDU25btPo4Ucu45Hx%2FdSZyZnkfUDiF4%2...0.0 ms48 B
/tr/?id=408175844597144&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
/globalassets/restricted/media/homepage/flood-sensing-ban...14400.0 s0 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.

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
www.uts.edu.au/fonts/nb-akademie/nb_akademie_regular-webfont.woff2135 ms
/s/materialsymbolsoutlined/v219/kJF1BvYX7BgnkSrUwT8OhrdQw...125 ms
/fonts/nb-international-pro/nb_international_pro_regular-...50 ms
www.uts.edu.au/fonts/tiempos-headline/tiempos-headline-medium.woff245 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff245 ms
www.uts.edu.au/fonts/nb-akademie/nb_akademie_bold-webfont.woff230 ms
/fonts/nb-international-pro/nb_international_pro_bold-web...30 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:1.002 source:map[column:85 line:808 type:source-location url:https://www.googletagmanager.com/gtm.js?id=GTM-PPCSCCF 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:57.743 source:map[type:text value:[unattributed]]] map[reflowTime:0.226 source:map[column:2514 line:0 type:source-location url:https://www.uts.edu.au/dist/assets/js/global.js urlProvider:network]] map[reflowTime:1.246 source:map[column:4266 line:0 type:source-location url:https://www.uts.edu.au/dist/assets/js/global.js urlProvider:network]] map[reflowTime:1.002 source:map[column:61 line:0 type:source-location url: urlProvider:network]] map[reflowTime:0.128 source:map[column:236 line:0 type:source-location url:https://www.uts.edu.au/dist/assets/js/Block/ExploreHub/Block__ExploreHub.js urlProvider:network]] map[reflowTime:3.263 source:map[column:5777 line:0 type:source-location url:https://www.uts.edu.au/dist/assets/js/Block/GlobalHeader/Block__GlobalHeader.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-VIDEO
nodeLabel: background video
path: 1,HTML,1,BODY,2,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,1,DIV,0,VIDEO
selector: div.homepageHeader__desktop-video > div.decorativeVideoPlayer > div.decorativeVideoPlayer__container > video.decorativeVideoPlayer__video
snippet: <video class="decorativeVideoPlayer__video" muted="" playsinline="" disablepictureinpicture="" aria-label="background video" data-type="decorative-video" autoplay="" loop="">

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
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.

URLTransfer SizeDuration
www.uts.edu.au/dist/css/index.css81.0 KiB271 ms
www.uts.edu.au/static/css/materialicons.css1.5 KiB271 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.

URLResource SizeEst Savings
div.image > figure.image__wrapper > picture.image__picture > img.image__img div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/bynder/09B78652-CB4A-404F-A7185A64540ACEA...256.3 KiB218.8 KiB
div.image > figure.image__wrapper > picture.image__picture > img.image__img div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/bynder/F873772C-C365-4856-B610CBD651B6B17...222.1 KiB199.3 KiB
abstract illustration of a crowd of people with different skin tones and hairst… div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/abf5a911-0f42-423c-843a-4ab5f0...101.5 KiB76.8 KiB
abstract illustration of a person balancing on an upward arrow with a pink grid… div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/de15ab4e-ca82-481f-b195-fe24ab...59.5 KiB45.1 KiB
abstract illustration of three people holding up a yellow circle div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/9178b116-7d4f-42fa-99c5-c01365...57.2 KiB43.3 KiB
abstract illustration of three hands holding a Venn diagram colour wheel div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/370d27d1-73e0-4fb4-a6c9-4880eb...39.2 KiB29.7 KiB
div.image > figure.image__wrapper > picture.image__picture > img.image__img div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/6cc30397-1a0b-4729-9e7f-aefe94...89.6 KiB23.1 KiB
div.image > figure.image__wrapper > picture.image__picture > img.image__img div.image > figure.image__wrapper > picture.image__picture > img.image__img
/AdaptiveImages/optimizely/824dd45e-3f2c-4f2e-bb39-558838...52.8 KiB17.1 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: 1.1 s
URLTime Spent
uts.edu.au/1.1 s
www.uts.edu.au/0.0 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 76.5 KiB
URLTransfer SizeEst Savings
www.uts.edu.au/dist/css/index.css80.2 KiB76.5 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: 270 ms 703.6 KiB
URLTransfer SizeEst Savings
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js109.2 KiB84.7 KiB
www.googletagmanager.com/gtag/js?id=G-9HXJVYQLGJ&cx=c&gtm=4e64k0172.6 KiB65.0 KiB
www.googletagmanager.com/gtag/js?id=AW-741797323&cx=c&gtm=4e64k0134.0 KiB62.9 KiB
www.googletagmanager.com/gtag/js?id=AW-10934141914&cx=c&gtm=4e64k0137.4 KiB62.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-WCCXPBGX&gtm=4e64k0171.8 KiB62.5 KiB
www.googletagmanager.com/gtag/js?id=AW-1008095213&cx=c&gtm=4e64k0137.4 KiB61.9 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js109.2 KiB57.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-PPCSCCF184.2 KiB56.6 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.8 KiB
/signals/config/408175844597144?v=2.9.303&r=stable&domain...126.9 KiB36.2 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB32.5 KiB
s.go-mpulse.net/boomerang/4XCE6-HGT9U-NTRWU-AJRXT-PMALV55.9 KiB31.9 KiB
www.uts.edu.au/dist/assets/js/Element/Carousel/Element__Carousel.js28.4 KiB27.0 KiB
www.uts.edu.au/dist/assets/js/Block/AnchorNavigation/Block__AnchorNavigation.js30.6 KiB24.1 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
Script Evaluation1.3 s
Other1.0 s
Script Parsing & Compilation214 ms
Style & Layout132 ms
Garbage Collection38 ms
Parse HTML & CSS34 ms
Rendering27 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 reasonFailure type
The page has an unload handler in the main frame.Actionable
The page has an unload handler in a sub 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 2.9 KiB
URLTransfer SizeEst Savings
www.uts.edu.au/dist/assets/js/Search/SearchPrompt/SearchPrompt.js7.8 KiB2.9 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/globalassets/restricted/media/homepage/flood-sensing-ban...59.8 MiB
www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js436.0 KiB
/s/materialsymbolsoutlined/v219/kJF1BvYX7BgnkSrUwT8OhrdQw...279.7 KiB
/AdaptiveImages/bynder/09B78652-CB4A-404F-A7185A64540ACEA...257.3 KiB
/AdaptiveImages/bynder/F873772C-C365-4856-B610CBD651B6B17...223.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-PPCSCCF184.5 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021...183.1 KiB
www.googletagmanager.com/gtag/js?id=G-9HXJVYQLGJ&cx=c&gtm=4e64k0172.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-WCCXPBGX&gtm=4e64k0171.9 KiB
/cdn-cgi/image/width=1512,format=auto,fit=crop,height=151...166.1 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
Instagram ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
LinkedIn ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
YouTube ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
TikTok ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
Facebook ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
WeChat ul.footer__image-list > li > a.link > img.footer__social-icon
/globalassets/restricted/media/all-pages-sitewide/footer/...
University of Technology Sydney div > div.footer__top-section > div.footer__left-section > img.footer__logo-image
/globalassets/restricted/media/all-pages-sitewide/footer/...
Australian Technology Network ul.footer__image-list > li.footer__image-list-item > a > img.footer__member-image
/globalassets/restricted/media/all-pages-sitewide/footer/...

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

●Max Potential First Input Delay 130 ms
●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 5 user timings
●JavaScript execution time 1.2 s
●Avoid long main-thread tasks 10 long tasks found
●Network Requests
●Network Round Trip Times 300 ms
●Server Backend Latencies 1,270 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 320 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○Avoid non-composited animations
100

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.

○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
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[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
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[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
○`<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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○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.
○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.
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
Unload event listeners are deprecated and will be removed.
js.monitor.azure.com/scripts/b/ai.2.gbl.min.js line 4, col 20343
AttributionReporting
snap.licdn.com/li.lms-analytics/insight.min.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
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Ensure proper origin isolation with COOP
○Mitigate clickjacking with XFO or CSP
100

SEO

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

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

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