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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.

46

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
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-1.jpg86400.0 s2.3 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-7.jpg86400.0 s1.6 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-10.jpg86400.0 s1.5 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-8.png86400.0 s1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-4.jpg86400.0 s1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-11.png86400.0 s1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-3.jpg86400.0 s1009.1 KiB
illinois.edu/wp-content/uploads/2025/08/Library-17-1.jpg86400.0 s995.8 KiB
illinois.edu/wp-content/themes/illinois/assets/campus.webp86400.0 s933.6 KiB
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-13-1.jpg86400.0 s826.8 KiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-5.png86400.0 s809.1 KiB
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-21-1.jpg86400.0 s759.4 KiB
illinois.edu/wp-content/uploads/2025/08/Library-23-1.jpg86400.0 s730.5 KiB
illinois.edu/wp-content/uploads/2025/08/Spurlock-9-1.jpg86400.0 s694.6 KiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-2.png86400.0 s670.0 KiB
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-23-1.jpg86400.0 s517.8 KiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-6.png86400.0 s435.3 KiB
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-22-1.jpg86400.0 s431.7 KiB
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-23.jpg86400.0 s411.3 KiB
illinois.edu/wp-content/uploads/2025/08/Spurlock-12-1.jpg86400.0 s405.9 KiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-9.jpg86400.0 s394.4 KiB
illinois.edu/wp-content/uploads/2025/08/Library-24-1.jpg86400.0 s377.9 KiB
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-1.jpg86400.0 s375.1 KiB
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-24.jpg86400.0 s370.7 KiB
cdn.brand.illinois.edu/fonts/source-sans/source-sans-var.woff20.0 ms135.0 KiB
illinois.edu/wp-content/uploads/2025/08/KAM-7-1.jpg86400.0 s319.0 KiB
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-24-1.jpg86400.0 s314.9 KiB
illinois.edu/wp-content/uploads/2025/08/Library-25-1.jpg86400.0 s313.0 KiB
illinois.edu/wp-content/uploads/2025/08/KAM-8-1.jpg86400.0 s285.7 KiB
cdn.disability.illinois.edu/skipto.min.js0.0 ms95.3 KiB
illinois.edu/wp-content/uploads/2025/08/Spurlock-11-1.jpg86400.0 s235.3 KiB
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-2.jpg86400.0 s212.6 KiB
cdn.brand.illinois.edu/fonts/montserrat/montserrat-700.woff20.0 ms81.9 KiB
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-25-1.jpg86400.0 s187.1 KiB
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-25-1.jpg86400.0 s184.3 KiB
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-4.jpg86400.0 s182.8 KiB
cdn.toolkit.illinois.edu/3.7.0/toolkit.css0.0 ms65.6 KiB
cdn.toolkit.illinois.edu/3.7.0/toolkit.js0.0 ms55.1 KiB
illinois.edu/wp-content/uploads/2025/08/KAM-5-1-1024x892.jpg86400.0 s131.5 KiB
illinois.edu/wp-content/uploads/2026/03/quad-shot-768x512.jpg86400.0 s123.3 KiB
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-3.jpg86400.0 s122.3 KiB
illinois.edu/wp-content/uploads/2026/03/UI-250517-FZ-002-768x511.jpg86400.0 s119.1 KiB
illinois.edu/wp-content/uploads/2025/08/Spurlock-10-1-1024x400.jpg86400.0 s80.7 KiB
illinois.edu/wp-content/uploads/2026/04/Rohit-Bhargava-Lab-768x432.jpg86400.0 s77.1 KiB
illinois.edu/wp-content/themes/illinois/js/search.js86400.0 s71.5 KiB
illinois.edu/wp-content/uploads/2025/08/KAM-6-1-1024x400.jpg86400.0 s66.0 KiB
illinois.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.186400.0 s35.1 KiB
illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-768x401.png86400.0 s27.5 KiB
cdn.brand.illinois.edu/components/il-footer.mjs0.0 ms9.0 KiB
illinois.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.8.386400.0 s19.7 KiB
/wp-content/themes/illinois/assets/Illinois_primary_wordm...86400.0 s17.6 KiB
onetrust.techservices.illinois.edu/scripttemplates/otSDKStub.js0.0 ms5.7 KiB
illinois.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.186400.0 s5.7 KiB
static.searchstax.com/studio-js/v4/js/studio-analytics.js0.0 ms2.0 KiB
cdn.brand.illinois.edu/illinois.css?ver=6.8.30.0 ms2.0 KiB
cdn.brand.illinois.edu/illinois.css0.0 ms2.0 KiB
illinois.edu/wp-content/plugins/illinois-calendar//js/calendar.js?ver=6.8.386400.0 s4.0 KiB
illinois.edu/wp-content/themes/illinois/css/search.css86400.0 s3.7 KiB
illinois.edu/wp-content/themes/illinois/css/header.css86400.0 s3.7 KiB
cdn.brand.illinois.edu/components/il-footer.css?ver=6.8.30.0 ms1.3 KiB
illinois.edu/wp-content/themes/illinois/css/card-carousel.css86400.0 s3.1 KiB
cdn.brand.illinois.edu/icons/solid/white/link.svg0.0 ms1.1 KiB
cdn.brand.illinois.edu/illinois.edu/info-blue.svg0.0 ms1.1 KiB
illinois.edu/wp-content/themes/illinois/css/level-one.css86400.0 s2.6 KiB
illinois.edu/wp-content/themes/illinois/css/calendar.css86400.0 s2.3 KiB
cdn.brand.illinois.edu/icons/solid/orange/location.svg0.0 ms944 B
illinois.edu/wp-content/plugins/illinois-calendar//js/slider.js?ver=6.8.386400.0 s2.2 KiB
cdn.brand.illinois.edu/illinois.edu/arrow/right/blue.svg0.0 ms880 B
cdn.brand.illinois.edu/illinois.edu/arrow/right/white.svg0.0 ms875 B
cdn.brand.illinois.edu/illinois.edu/arrow/left/blue.svg0.0 ms874 B
cdn.brand.illinois.edu/illinois.edu/arrow/left/white.svg0.0 ms855 B
illinois.edu/wp-content/themes/illinois/css/horizontal-scroller.css86400.0 s2.1 KiB
illinois.edu/wp-content/themes/illinois/css/slider.css86400.0 s2.0 KiB
illinois.edu/wp-content/themes/illinois/css/footer.css86400.0 s1.9 KiB
/wp-content/plugins/illinois-card-carousel//js/card-carou...86400.0 s1.8 KiB
illinois.edu/wp-content/themes/illinois/js/mega-menu.js?ver=2.4.686400.0 s1.7 KiB
cdn.brand.illinois.edu/icons/solid/blue/exit.svg0.0 ms685 B
illinois.edu/wp-content/themes/illinois/css/typography.css86400.0 s1.6 KiB
cdn.brand.illinois.edu/icons/solid/white/search.svg0.0 ms656 B
illinois.edu/wp-content/themes/illinois/css/wp-overrides.css86400.0 s1.6 KiB
illinois.edu/wp-content/themes/illinois/css/homepage-hero.css86400.0 s1.5 KiB
illinois.edu/wp-content/themes/illinois/css/level-two.css86400.0 s1.5 KiB
illinois.edu/wp-content/themes/illinois/assets/white-ascending-lines.svg86400.0 s1.5 KiB
illinois.edu/wp-content/themes/illinois/style.css?ver=02.13.202686400.0 s1.4 KiB
illinois.edu/wp-content/themes/illinois/css/sitemap-and-error-page.css86400.0 s1.4 KiB
illinois.edu/wp-content/themes/illinois/css/hero.css86400.0 s1.4 KiB
illinois.edu/wp-content/themes/illinois/css/wigg.css86400.0 s1.1 KiB
illinois.edu/wp-content/themes/illinois/js/hero-video.js?ver=1.086400.0 s1009 B
illinois.edu/wp-content/themes/illinois/css/page.css86400.0 s990 B
illinois.edu/wp-content/themes/illinois/css/breadcrumbs.css86400.0 s941 B
illinois.edu/wp-content/themes/illinois/assets/play.svg86400.0 s924 B
illinois.edu/wp-content/themes/illinois/css/homepage.css86400.0 s912 B
illinois.edu/wp-content/themes/illinois/js/search-mod.js86400.0 s906 B
illinois.edu/wp-content/themes/illinois/assets/pause.svg86400.0 s890 B
illinois.edu/wp-content/themes/illinois/css/alert.css86400.0 s883 B
illinois.edu/wp-content/themes/illinois/css/rankings.css86400.0 s872 B
illinois.edu/wp-content/themes/illinois/assets/chevron-right.svg86400.0 s831 B
illinois.edu/wp-content/themes/illinois/js/skiptoconf.js?ver=6.8.386400.0 s813 B
illinois.edu/wp-content/uploads/2025/09/homepage-video-compressed.mp486400.0 s0 B

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:0.13808399999999998] map[node:map[boundingRect:map[bottom:1133 height:444 left:0 right:412 top:689 width:412] lhId:page-28-DIV nodeLabel:Start your Explore Undergraduate Majors Undergraduate Admissions Discover Gradu… path:1,HTML,1,BODY,5,MAIN,2,DIV selector:body.home > main > div.wp-block-group snippet:<div class="wp-block-group alignfull removal-during-emergency has-background" style="background-color:#13294b"> type:node] score:0.138032 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:804 height:75 left:218 right:362 top:729 width:144] lhId:page-24-IMG nodeLabel:Journey path:1,HTML,1,BODY,5,MAIN,2,DIV,0,DIV,1,DIV,1,FIGURE,0,IMG selector:div.wp-block-group__inner-container > div.wp-block-group > figure.wp-block-image > img.wp-image-1025 snippet:<img fetchpriority="high" decoding="async" width="1024" height="534" src="https://illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-768x4…" alt="Journey" class="wp-image-1025" style="width:auto;height:75px" srcset="https://illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-1024x…" sizes="(max-width: 1024px) 100vw, 1024px"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:388 height:65 left:320 right:392 top:323 width:72] lhId:page-32-BUTTON nodeLabel:Pause path:1,HTML,1,BODY,5,MAIN,1,SECTION,0,DIV,1,DIV,1,BUTTON selector:section.home-hero > div.home-hero__wrapper > div.home-hero__video-wrapper > button#play-pause-button snippet:<button id="play-pause-button" class="home-hero__controls" type="button" aria-pressed="true" aria-controls="hero-video"> type:node] score:5.2e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:384 height:60 left:326 right:386 top:324 width:60] lhId:page-35-IMG nodeLabel:div.home-hero__video-wrapper > button#play-pause-button > span.home-hero__pause-button > img path:1,HTML,1,BODY,5,MAIN,1,SECTION,0,DIV,1,DIV,1,BUTTON,1,SPAN,0,IMG selector:div.home-hero__video-wrapper > button#play-pause-button > span.home-hero__pause-button > img snippet:<img src="https://illinois.edu/wp-content/themes/illinois/assets/pause.svg" alt=""> type:node]]] type:subitems]]]
headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.11947] map[node:map[boundingRect:map[bottom:689 height:259 left:0 right:412 top:430 width:412] lhId:page-33-DIV nodeLabel:Leading the Future Impact and Innovation at Illinois path:1,HTML,1,BODY,5,MAIN,1,SECTION,0,DIV,0,DIV selector:main > section.home-hero > div.home-hero__wrapper > div.home-hero__text snippet:<div class="home-hero__text"> type:node] score:0.11947 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:804 height:75 left:218 right:362 top:729 width:144] lhId:page-24-IMG nodeLabel:Journey path:1,HTML,1,BODY,5,MAIN,2,DIV,0,DIV,1,DIV,1,FIGURE,0,IMG selector:div.wp-block-group__inner-container > div.wp-block-group > figure.wp-block-image > img.wp-image-1025 snippet:<img fetchpriority="high" decoding="async" width="1024" height="534" src="https://illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-768x4…" alt="Journey" class="wp-image-1025" style="width:auto;height:75px" srcset="https://illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-1024x…" sizes="(max-width: 1024px) 100vw, 1024px"> type:node]]] type:subitems]]]

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:35.837 source:map[column:477 line:153 type:source-location url:https://cdn.toolkit.illinois.edu/3.7.0/toolkit.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:39.912 source:map[column:24 line:688 type:source-location url:https://illinois.edu/ urlProvider:network]] map[reflowTime:35.837 source:map[column:1563 line:152 type:source-location url:https://cdn.toolkit.illinois.edu/3.7.0/toolkit.js urlProvider:network]]]

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
Illinois graduates jumping for joy div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-1.jpg2.3 MiB2.2 MiB
A group of students smiling at a campus event div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-7.jpg1.6 MiB1.6 MiB
div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-10.jpg1.5 MiB1.5 MiB
div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-8.png1.1 MiB1.1 MiB
Two doctoral graduates hugging infront of the orange dyed fountain div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-4.jpg1.1 MiB1.1 MiB
div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-11.png1.1 MiB1.0 MiB
Alma statue standing proudly in front of a blue sky scattered with clouds div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-3.jpg1008.6 KiB989.9 KiB
div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-5.png808.6 KiB796.2 KiB
body.home > main > div.page-end--img-wrapper > img.page-end--img body.home > main > div.page-end--img-wrapper > img.page-end--img
illinois.edu/wp-content/themes/illinois/assets/campus.webp933.1 KiB770.3 KiB
div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-2.png669.6 KiB647.3 KiB
div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img div.horizontal > div.scroller-grid > div.horizontal-scroller__img > img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-6.png434.8 KiB422.4 KiB
Students waving an Illinois flag div.sticky > div.horizontal > div.scroller-grid > img.horizontal-scroller__img
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-9.jpg393.9 KiB387.7 KiB
div.card-carousel__card__flip-card > div.card-carousel__card__flip-card-front > div.card-carousel__card__flip-card__image > img div.card-carousel__card__flip-card > div.card-carousel__card__flip-card-front > div.card-carousel__card__flip-card__image > img
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-1.jpg374.6 KiB332.6 KiB
div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-2.jpg212.1 KiB205.3 KiB
div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-4.jpg182.4 KiB173.5 KiB
div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img div.card-carousel__card > div.card-carousel__card__image-grid > div.card-carousel__card__image-grid__image > img
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-3.jpg121.8 KiB115.7 KiB
div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1335 div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1335
illinois.edu/wp-content/uploads/2026/03/quad-shot-768x512.jpg122.8 KiB79.3 KiB
div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1345 div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1345
illinois.edu/wp-content/uploads/2026/03/UI-250517-FZ-002-768x511.jpg118.6 KiB75.2 KiB
Five University of Illinois Urbana-Champaign faculty members were honored by th… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/12214529/UI-230124-FZ-008-364...71.6 KiB57.2 KiB
Yue (Darcy) Lu standing with one elbow on her knee with flowering spring trees … div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/15094746/Lua_Yue-Darcy-260401...70.1 KiB55.7 KiB
div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1380 div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-1380
illinois.edu/wp-content/uploads/2026/04/Rohit-Bhargava-Lab-768x432.jpg76.6 KiB39.8 KiB
Diptych image of José A. de la Garza Valenzuela and the cover of his book “Quee… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/20145153/cr-valenzuela_book-m...47.2 KiB32.8 KiB
U. of I. Quad div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/14111045/UI-260304-FZ-014-1-3...45.0 KiB30.6 KiB
Photo of a blackboard painted with arrows and other colorful imagery. div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
media.news.illinois.edu/wp-content/uploads/2026/04/13124550/723018-e-364x243.jpg39.6 KiB25.2 KiB
Journey div.wp-block-group__inner-container > div.wp-block-group > figure.wp-block-image > img.wp-image-1025
illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-768x401.png27.1 KiB24.2 KiB
One large and one inset photo. Inset shows Terio in Gombe Park under trees wher… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/10094718/composite-goodall-te...38.3 KiB24.0 KiB
Diptych image of headshots of Christopher Kempf and Julie Turnock. div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/09135251/cr-guggenheim-m-364x...33.5 KiB19.1 KiB

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:488.638 label:Time to first byte subpart:timeToFirstByte] map[duration:886.055 label:Resource load delay subpart:resourceLoadDelay] map[duration:0 label:Resource load duration subpart:resourceLoadDuration] map[duration:2273.202 label:Element render delay subpart:elementRenderDelay]]
lhId: page-27-VIDEO
nodeLabel: div.home-hero__wrapper > div.home-hero__video-wrapper > figure > video#hero-video
path: 1,HTML,1,BODY,5,MAIN,1,SECTION,0,DIV,1,DIV,0,FIGURE,0,VIDEO
selector: div.home-hero__wrapper > div.home-hero__video-wrapper > figure > video#hero-video
snippet: <video loop="" muted="" playsinline="" id="hero-video" src="https://illinois.edu/wp-content/uploads/2025/09/homepage-video-compressed.…">

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-27-VIDEO
nodeLabel: div.home-hero__wrapper > div.home-hero__video-wrapper > figure > video#hero-video
path: 1,HTML,1,BODY,5,MAIN,1,SECTION,0,DIV,1,DIV,0,FIGURE,0,VIDEO
selector: div.home-hero__wrapper > div.home-hero__video-wrapper > figure > video#hero-video
snippet: <video loop="" muted="" playsinline="" id="hero-video" src="https://illinois.edu/wp-content/uploads/2025/09/homepage-video-compressed.…">

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.

URLProtocol
illinois.edu/http/1.1
illinois.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.8.3http/1.1
illinois.edu/wp-content/themes/illinois/style.css?ver=02.13.2026http/1.1
illinois.edu/wp-content/plugins/illinois-calendar//js/calendar.js?ver=6.8.3http/1.1
illinois.edu/wp-content/plugins/illinois-calendar//js/slider.js?ver=6.8.3http/1.1
/wp-content/plugins/illinois-card-carousel//js/card-carou...http/1.1
illinois.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.1http/1.1
illinois.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1http/1.1
illinois.edu/wp-content/themes/illinois/js/skiptoconf.js?ver=6.8.3http/1.1
illinois.edu/wp-content/themes/illinois/assets/pause.svghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/play.svghttp/1.1
illinois.edu/wp-content/uploads/2025/07/Journey-PNG-scaled-2-768x401.pnghttp/1.1
illinois.edu/wp-content/uploads/2026/04/Rohit-Bhargava-Lab-768x432.jpghttp/1.1
illinois.edu/wp-content/uploads/2026/03/UI-250517-FZ-002-768x511.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-1.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-2.pnghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-3.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-4.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-5.pnghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-6.pnghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-7.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-8.pnghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-9.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-10.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-11.pnghttp/1.1
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-2.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-3.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/10/Champaign-Urbana-4.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/KAM-5-1-1024x892.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/KAM-6-1-1024x400.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/KAM-8-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/KAM-7-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Spurlock-9-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Spurlock-10-1-1024x400.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Spurlock-12-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Spurlock-11-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-13-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-25-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-24-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Krannert-Center-23-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Library-17-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Library-23-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Library-25-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Library-24-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-21-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-22-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-25-1.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-24.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/08/Culutral-Centers-23.jpghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/campus.webphttp/1.1
illinois.edu/wp-content/themes/illinois/js/mega-menu.js?ver=2.4.6http/1.1
illinois.edu/wp-content/themes/illinois/js/search.jshttp/1.1
illinois.edu/wp-content/themes/illinois/js/search-mod.jshttp/1.1
illinois.edu/wp-content/themes/illinois/js/hero-video.js?ver=1.0http/1.1
illinois.edu/wp-content/themes/illinois/css/typography.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/wp-overrides.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/wigg.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/header.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/footer.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/search.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/page.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/slider.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/card-carousel.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/calendar.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/hero.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/level-one.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/sitemap-and-error-page.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/level-two.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/breadcrumbs.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/homepage.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/homepage-hero.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/horizontal-scroller.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/rankings.csshttp/1.1
illinois.edu/wp-content/themes/illinois/css/alert.csshttp/1.1
/wp-content/themes/illinois/assets/Illinois_primary_wordm...http/1.1
illinois.edu/wp-content/themes/illinois/assets/white-ascending-lines.svghttp/1.1
illinois.edu/wp-content/themes/illinois/assets/chevron-right.svghttp/1.1
illinois.edu/wp-content/uploads/2026/03/quad-shot-768x512.jpghttp/1.1
illinois.edu/wp-content/uploads/2025/09/homepage-video-compressed.mp4http/1.1

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.

URLTransfer SizeDuration
illinois.edu/wp-content/themes/illinois/js/skiptoconf.js?ver=6.8.3813 B282 ms
illinois.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.15.7 KiB551 ms
illinois.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.135.1 KiB2.4 s
/wp-content/plugins/illinois-card-carousel//js/card-carou...1.8 KiB820 ms
illinois.edu/wp-content/themes/illinois/css/alert.css883 B282 ms
illinois.edu/wp-content/themes/illinois/css/rankings.css872 B282 ms
illinois.edu/wp-content/themes/illinois/css/horizontal-scroller.css2.1 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/homepage-hero.css1.5 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/homepage.css912 B282 ms
illinois.edu/wp-content/themes/illinois/css/sitemap-and-error-page.css1.4 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/level-two.css1.5 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/breadcrumbs.css941 B282 ms
illinois.edu/wp-content/themes/illinois/css/level-one.css2.6 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/calendar.css2.3 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/hero.css1.4 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/slider.css2.0 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/card-carousel.css3.1 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/page.css990 B282 ms
illinois.edu/wp-content/plugins/illinois-calendar//js/slider.js?ver=6.8.32.2 KiB820 ms
illinois.edu/wp-content/plugins/illinois-calendar//js/calendar.js?ver=6.8.34.0 KiB820 ms
illinois.edu/wp-content/themes/illinois/css/search.css3.7 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/footer.css1.9 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/header.css3.7 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/wigg.css1.1 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/wp-overrides.css1.6 KiB282 ms
illinois.edu/wp-content/themes/illinois/css/typography.css1.6 KiB282 ms
onetrust.techservices.illinois.edu/scripttemplates/otSDKStub.js5.7 KiB1.3 s
illinois.edu/wp-content/themes/illinois/style.css?ver=02.13.20261.4 KiB820 ms
illinois.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.8.319.7 KiB820 ms
cdn.toolkit.illinois.edu/3.7.0/toolkit.css65.6 KiB2.8 s
cdn.disability.illinois.edu/skipto.min.js95.3 KiB3.1 s
cdn.toolkit.illinois.edu/3.7.0/toolkit.js55.1 KiB660 ms
cdn.brand.illinois.edu/components/il-footer.css?ver=6.8.31.3 KiB165 ms
cdn.brand.illinois.edu/illinois.css?ver=6.8.32.0 KiB799 ms
cdn.brand.illinois.edu/illinois.css2.0 KiB165 ms

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

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

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
Start your Explore Undergraduate Majors Undergraduate Admissions Discover Gradu… body.home > main > div.wp-block-group
0.138
Start your Explore Undergraduate Majors Undergraduate Admissions Discover Gradu… body.home > main > div.wp-block-group
0.119
Pause section.home-hero > div.home-hero__wrapper > div.home-hero__video-wrapper > button#play-pause-button
0.000

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: 510 ms 80.1 KiB
URLTransfer SizeEst Savings
cdn.toolkit.illinois.edu/3.7.0/toolkit.css65.1 KiB61.1 KiB
illinois.edu/wp-includes/css/dist/block-library/style.min.css?ver=6.8.319.2 KiB18.9 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: 1.7 s 257.9 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtm.js?id=GTM-5SX53NV7125.2 KiB65.2 KiB
www.googletagmanager.com/gtag/js?id=GT-KTPV7C3157.2 KiB64.6 KiB
illinois.edu/wp-content/themes/illinois/js/search.js71.0 KiB44.7 KiB
cdn.disability.illinois.edu/skipto.min.js94.7 KiB36.2 KiB
cdn.toolkit.illinois.edu/3.7.0/toolkit.js54.6 KiB24.1 KiB
illinois.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.134.6 KiB23.0 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.

CategoryTime Spent
Other1.7 s
Script Evaluation784 ms
Style & Layout547 ms
Rendering268 ms
Script Parsing & Compilation218 ms
Parse HTML & CSS130 ms

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 2.2 KiB
URLTransfer SizeEst Savings
onetrust.techservices.illinois.edu/scripttemplates/otSDKStub.js5.3 KiB2.2 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
illinois.edu/wp-content/uploads/2025/09/homepage-video-compressed.mp44.3 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-1.jpg2.3 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-7.jpg1.6 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-10.jpg1.5 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-8.png1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-4.jpg1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-11.png1.1 MiB
illinois.edu/wp-content/themes/illinois/assets/scroller-photos/slider-3.jpg1009.1 KiB
illinois.edu/wp-content/uploads/2025/08/Library-17-1.jpg995.8 KiB
illinois.edu/wp-content/themes/illinois/assets/campus.webp933.6 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
Diptych image of José A. de la Garza Valenzuela and the cover of his book “Quee… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/20145153/cr-valenzuela_book-m...
Yue (Darcy) Lu standing with one elbow on her knee with flowering spring trees … div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/15094746/Lua_Yue-Darcy-260401...
U. of I. Quad div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/14111045/UI-260304-FZ-014-1-3...
Diptych image of headshots of Christopher Kempf and Julie Turnock. div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/09135251/cr-guggenheim-m-364x...
One large and one inset photo. Inset shows Terio in Gombe Park under trees wher… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/10094718/composite-goodall-te...
Photo of a blackboard painted with arrows and other colorful imagery. div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
media.news.illinois.edu/wp-content/uploads/2026/04/13124550/723018-e-364x243.jpg
Five University of Illinois Urbana-Champaign faculty members were honored by th… div.slider__wrapper > article.slider__post-card > div.slider__img-wrap > img.slider__image
/wp-content/uploads/2026/04/12214529/UI-230124-FZ-008-364...
div.home-hero__video-wrapper > button#play-pause-button > span.home-hero__pause-button > img div.home-hero__video-wrapper > button#play-pause-button > span.home-hero__pause-button > img
illinois.edu/wp-content/themes/illinois/assets/pause.svg

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

●Document request latency
●Optimize DOM size
●Font display
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.9 s
●Avoid long main-thread tasks 10 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 120 ms
●Server Backend Latencies 320 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 240 ms
○INP breakdown
○Avoid non-composited animations
97

Accessibility

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

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
header.header > div.header__top > div.header-menu__wrapper > a.header__home-link header.header > div.header__top > div.header-menu__wrapper > a.header__home-link

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.

○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
●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.
●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
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Elements with visible text labels have matching accessible names.
○`[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
○`<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.
○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.
○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.
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
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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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