Skip to content
https://ucdavis.edu

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

79

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
d9wxf5clf37aa.cloudfront.net/14385/instagram/18547144960066777/large.jpeg0.0 ms873.1 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/18580130857021528/large.jpeg0.0 ms461.3 KiB
/p/1770401/sp/177040100/thumbnail/entry_id/1_66io7z1p/ver...3600.0 s574.6 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3875445469300270546/videoCover.jpeg0.0 ms450.2 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3875340308326635114/videoCover.jpeg0.0 ms202.1 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3875977766314806075/videoCover.jpeg0.0 ms200.0 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876732404619313084/large.jpeg0.0 ms174.5 KiB
/p/1770401/sp/177040100/thumbnail/entry_id/1_66io7z1p/ver...3600.0 s163.8 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876202986029625893/large.jpeg0.0 ms111.4 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876185183649298264/large.jpeg0.0 ms93.4 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876052494875202158/videoCover.jpeg0.0 ms91.6 KiB
connect.facebook.net/en_US/bundle/sdk.js/1200.0 s77.8 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876731439148287934/videoCover.jpeg0.0 ms65.5 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3876646633425652592/videoCover.jpeg0.0 ms64.7 KiB
/html5/html5lib/v2.101/load.php?debug=false&lang=en&modul...2483323.0 s688.5 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3867455368130075663/large.jpeg0.0 ms52.5 KiB
/ytc/AIdro_mSci5uCcANtd32r5ngCNm6B4X8OStgm0BIQ18hUkHCGOI=...86400.0 s104.0 KiB
/html5/html5lib/v2.101/mwEmbedLoader.php?&wid=1_pxq37z1x&...580.0 s21.5 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
ssl.google-analytics.com/ga.js7200.0 s17.4 KiB
static.hotjar.com/c/hotjar-653936.js?sv=660.0 s6.3 KiB
/proxima-nova/proximanova_regular_macroman/proximanova-re...86400.0 s14.2 KiB
/proxima-nova/proximanova_light_macroman/proximanova-ligh...86400.0 s14.2 KiB
/proxima-nova/proximanova_bold_macroman/proximanova-bold-...86400.0 s14.1 KiB
/proxima-nova/proximanova_extrabold_macroman/proximanova-...86400.0 s14.0 KiB
connect.facebook.net/en_US/sdk.js1200.0 s5.1 KiB
/html5/html5lib/v2.101//skins/kdark/fonts/icomoon.woff?20...2382542.0 s14.1 KiB
/p.css?s=1&k=xoa5bav&ht=tk&f=13441.13442.13443.13444.1848...604800.0 s172 B
d9wxf5clf37aa.cloudfront.net/14385/instagram/18071767667248958/video.mp40.0 ms0 B
d9wxf5clf37aa.cloudfront.net/14385/instagram/18095717779847065/video.mp40.0 ms0 B

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
cdn.icomoon.io/61472/Embeds/icomoon.woff2?ls0q5g65 ms
fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff240 ms
/html5/html5lib/v2.101//skins/kdark/fonts/icomoon.woff?20...5.0 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:11.927 source:map[column:64360 line:1 type:source-location url:https://www.ucdavis.edu/profiles/sitefarm/themes/sitefarm_one/dist/main.js?tdqxrg 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:112.812 source:map[type:text value:[unattributed]]] map[reflowTime:2.512 source:map[column:8416 line:0 type:source-location url:https://www.ucdavis.edu/profiles/sitefarm/themes/sitefarm_one/dist/main.js?tdqxrg urlProvider:network]] map[reflowTime:11.927 source:map[column:63870 line:0 type:source-location url:https://www.ucdavis.edu/profiles/sitefarm/themes/sitefarm_one/dist/main.js?tdqxrg urlProvider:network]] map[reflowTime:0.332 source:map[column:50335 line:2 type:source-location url:https://www.ucdavis.edu/sites/default/files/js/js_XyTeP9Nz8vI4PNCaScH-D3W_xU4DF4wSpEP7kxQXpVg.js?scope=footer&delta=0&language=en&theme=ucd&include=eJxdzEEOgCAMBdELoT1S88VKmhRqKJpwexdujMt5i4ESlIv5BkvFvZgwGmwOzUF_SKFDDvTK3oS-sZ5dK_rkhjtdead3ucSYJvEAEI4oOQ urlProvider:network]] map[reflowTime:0.18 source:map[column:50393 line:2 type:source-location url:https://www.ucdavis.edu/sites/default/files/js/js_XyTeP9Nz8vI4PNCaScH-D3W_xU4DF4wSpEP7kxQXpVg.js?scope=footer&delta=0&language=en&theme=ucd&include=eJxdzEEOgCAMBdELoT1S88VKmhRqKJpwexdujMt5i4ESlIv5BkvFvZgwGmwOzUF_SKFDDvTK3oS-sZ5dK_rkhjtdead3ucSYJvEAEI4oOQ urlProvider:network]] map[reflowTime:0.134 source:map[column:50457 line:2 type:source-location url:https://www.ucdavis.edu/sites/default/files/js/js_XyTeP9Nz8vI4PNCaScH-D3W_xU4DF4wSpEP7kxQXpVg.js?scope=footer&delta=0&language=en&theme=ucd&include=eJxdzEEOgCAMBdELoT1S88VKmhRqKJpwexdujMt5i4ESlIv5BkvFvZgwGmwOzUF_SKFDDvTK3oS-sZ5dK_rkhjtdead3ucSYJvEAEI4oOQ urlProvider:network]] map[reflowTime:0.323 source:map[column:49615 line:2 type:source-location url:https://www.ucdavis.edu/sites/default/files/js/js_XyTeP9Nz8vI4PNCaScH-D3W_xU4DF4wSpEP7kxQXpVg.js?scope=footer&delta=0&language=en&theme=ucd&include=eJxdzEEOgCAMBdELoT1S88VKmhRqKJpwexdujMt5i4ESlIv5BkvFvZgwGmwOzUF_SKFDDvTK3oS-sZ5dK_rkhjtdead3ucSYJvEAEI4oOQ 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
orange and red watercolor wheat stalk div.main-image > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/ag-ranking-wheat%282%29.png122.7 KiB113.6 KiB
Map of California div.interactive-map > div.interactive-map__container > picture > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/map.jpg220.9 KiB112.0 KiB
A smiling UC Davis graduate div.main-image > div.field > div.media > img.lazyload
/sites/default/files/media/images/grad-fin-outcomes-uc-da...86.7 KiB77.7 KiB
A stack of books with a gradcap on top div.main-image > div.field > div.media > img.lazyload
www.ucdavis.edu/sites/default/files/media/images/public-ranking-books2.png62.3 KiB55.9 KiB
The most adorable puppy who ever lived. div.main-image > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/dog-cut-out.png55.4 KiB49.6 KiB
Students with pom poms gathered in front of a wall that reads, UC Davis, to che… div.hero-ambient__media > div.hero-ambient__image > div.field > img.image-style-hero-x-large-2000-x-1125
/sites/default/files/styles/hero_x_large_2000_x_1125/publ...77.2 KiB42.0 KiB
UC Davis Health div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/ucd-health.png37.3 KiB35.8 KiB
Purple and blue watercolor brush strokes div.ranking__back > div.field > div.media > img.lazyload
/sites/default/files/media/images/grad-fin-outcomes-uc-da...35.9 KiB32.2 KiB
watercolor splash orange and red div.ranking__back > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/ag-ranking-spash%281%29.png34.2 KiB30.6 KiB
UC Davis Main Campus div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/main-campus.png31.8 KiB29.1 KiB
water color splash div.ranking__back > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/vet-ranking-splash%281%29.png25.9 KiB23.2 KiB
a green and blue paint stroke div.ranking__back > div.field > div.media > img.lazyload
www.ucdavis.edu/sites/default/files/media/images/public-ranking-back.png25.5 KiB22.9 KiB
A nine with a gradcap on top div.icon__area--circle > div.field > div.media > img.lazyload
www.ucdavis.edu/sites/default/files/media/images/usnews-ranking-icon24.png20.0 KiB19.4 KiB
UC Davis Bodega Marine Lab div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/bodega-lab.png11.8 KiB11.0 KiB
Aggies logo over california state div.full-width-teaser__image > div.field > div.field__item > img.image-style-sf-landscape-4x3
/sites/default/files/styles/sf_landscape_4x3/public/media...14.2 KiB10.8 KiB
paw icon with a one in it div.icon__area--circle > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/vet-ranking-icon_2.png10.2 KiB9.9 KiB
UC Davis Tahoe Environmental Research Center div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/tahoe-research.png10.4 KiB9.6 KiB
A two with lines extending from the top and bottom to indicate currency div.icon__area--circle > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/financial-ranking-uc-davis.png8.9 KiB8.6 KiB
Number one wheat icon div.icon__area--circle > div.field > div.media > img
www.ucdavis.edu/sites/default/files/media/images/ag-ranking-icon.png8.2 KiB7.9 KiB
A person looking at some x-rays in a lab div.field > div.field__item > div.media > img.image-style-sf-landscape-16x9
/sites/default/files/styles/sf_landscape_16x9/public/medi...15.2 KiB4.4 KiB

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-5-IMG
nodeLabel: Students with pom poms gathered in front of a wall that reads, UC Davis, to che…
path: 1,HTML,1,BODY,2,DIV,0,DIV,1,MAIN,3,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div.hero-ambient__media > div.hero-ambient__image > div.field > img.image-style-hero-x-large-2000-x-1125
snippet: <img loading="lazy" src="/sites/default/files/styles/hero_x_large_2000_x_1125/public/media/images/c…" width="2000" height="1125" alt="Students with pom poms gathered in front of a wall that reads, UC Davis, t…" typeof="foaf:Image" class="image-style-hero-x-large-2000-x-1125">

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
use.fontawesome.com/releases/v6.7.2/css/all.css22.4 KiB292 ms
use.typekit.net/xoa5bav.css1.9 KiB246 ms
/sites/default/files/css/css_NzkM4GbhhET5XHC1-a_ep_fASEAb...88.6 KiB281 ms
/p.css?s=1&k=xoa5bav&ht=tk&f=13441.13442.13443.13444.1848...172 B207 ms
/sites/default/files/css/css_vZrGZm6bR8kC-f6E8I__y-NP11Vc...3.1 KiB
/sites/default/files/css/css_ljVg4c_RwY6bXYS-YcOC2LqJRcLE...6.0 KiB

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.

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: 205 ms
URLTime Spent
ucdavis.edu/205 ms
www.ucdavis.edu/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: 80 ms 97.8 KiB
URLTransfer SizeEst Savings
/sites/default/files/css/css_NzkM4GbhhET5XHC1-a_ep_fASEAb...88.2 KiB76.1 KiB
use.fontawesome.com/releases/v6.7.2/css/all.css22.1 KiB21.8 KiB

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 a sub frame.Actionable

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: 0.0 ms 457.8 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-1THQTW46YF&cx=c&gtm=4e64h1157.0 KiB67.4 KiB
www.googletagmanager.com/gtag/js?id=G-0WNSFZE492&cx=c&gtm=4e64h1157.0 KiB67.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-K4N8X8M149.5 KiB67.0 KiB
www.googletagmanager.com/gtag/js?id=G-2N9JP0W2PC175.6 KiB65.8 KiB
www.googletagmanager.com/gtag/js?id=G-XJ9SKW94MM&cx=c&gtm=4e64h1154.1 KiB65.5 KiB
www.googletagmanager.com/gtag/js?id=G-3F5L6WYJ4W&cx=c&gtm=4e64h1171.3 KiB61.6 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.7 KiB
/sites/default/files/js/js_XyTeP9Nz8vI4PNCaScH-D3W_xU4DF4...38.3 KiB25.4 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
/hls/p/1770401/sp/177040100/serveFlavor/entryId/1_66io7z1...4.7 MiB
/hls/p/1770401/sp/177040100/serveFlavor/entryId/1_66io7z1...1.9 MiB
/hls/p/1770401/sp/177040100/serveFlavor/entryId/1_66io7z1...1.1 MiB
/hls/p/1770401/sp/177040100/serveFlavor/entryId/1_66io7z1...1.0 MiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/18547144960066777/large.jpeg873.1 KiB
/html5/html5lib/v2.101/load.php?debug=false&lang=en&modul...688.5 KiB
/p/1770401/sp/177040100/thumbnail/entry_id/1_66io7z1p/ver...574.6 KiB
/hls/p/1770401/sp/177040100/serveFlavor/entryId/1_66io7z1...465.4 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/18580130857021528/large.jpeg461.3 KiB
d9wxf5clf37aa.cloudfront.net/14385/instagram/3875445469300270546/videoCover.jpeg450.2 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
Map of California div.interactive-map > div.interactive-map__container > picture > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/map.jpg
div.o-box--flush > a.ranking > div.ranking__middle > img div.o-box--flush > a.ranking > div.ranking__middle > img
www.ucdavis.edu/themes/custom/ucd/images/components/splash-frame.png
div.o-box--flush > a.ranking > div.ranking__middle > img div.o-box--flush > a.ranking > div.ranking__middle > img
www.ucdavis.edu/themes/custom/ucd/images/components/splash-frame.png
div.block > a.ranking > div.ranking__middle > img div.block > a.ranking > div.ranking__middle > img
www.ucdavis.edu/themes/custom/ucd/images/components/splash-frame.png
div.o-box--flush > a.ranking > div.ranking__middle > img div.o-box--flush > a.ranking > div.ranking__middle > img
www.ucdavis.edu/themes/custom/ucd/images/components/splash-frame.png
UC Davis Main Campus div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/main-campus.png
UC Davis Bodega Marine Lab div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/bodega-lab.png
UC Davis Health div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/ucd-health.png
UC Davis Tahoe Environmental Research Center div.interactive-map__container > a.interactive-map__pin > div.interactive-map__pin-text > img.interactive-map__pin-img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/tahoe-research.png
Sequoia National Park div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/sequoia-icon.svg
Silicon Valley div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/silicon-valley.svg
Sacramento div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/sacramento.svg
Redwood National Park div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/redwood-icon.svg
Yosemite National Park div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/yosemite.svg
Lake Tahoe div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/lake-tahoe.svg
San Francisco div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/san-fran.svg
Lassen Volcanic National Park div.interactive-map__container > div.interactive-map__flag > span.interactive-map__icon > img
www.ucdavis.edu/themes/custom/ucd/images/custom_map/lassen-icon.svg
facebook f div.clearfix > div.branded-social-container > a > img.lazyload
instagram camera icon div.clearfix > div.branded-social-container > a > img.lazyload
twitter bird icon div.clearfix > div.branded-social-container > a > img.lazyload
Youtube play icon div.clearfix > div.branded-social-container > a > img.lazyload
ticktok music icon div.clearfix > div.branded-social-container > a > img.lazyload
Linkedin in icon div.clearfix > div.branded-social-container > a > img.lazyload
Linkedin in icon div.clearfix > div.branded-social-container > a > img.lazyload
watercolor illustration of the highlights of the UC Davis campus including the … div.l-full-width > div.clearfix > picture > img.lazyload

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 25 user timings
●JavaScript execution time 0.6 s
●Minimizes main-thread work 1.2 s
●Avoid long main-thread tasks 6 long tasks found
●Avoid non-composited animations 4 animated elements found
●Network Requests
●Network Round Trip Times 180 ms
●Server Backend Latencies 330 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 10 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
96

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
HOUSING div.o-box--flush > a.marketing-link > div.marketing-link__body > h3.marketing-link__title
DINING AND FOOD div.o-box--flush > a.marketing-link > div.marketing-link__body > h3.marketing-link__title
CITY OF DAVIS div.o-box--flush > a.marketing-link > div.marketing-link__body > h3.marketing-link__title
ATHLETICS div.o-box--flush > a.marketing-link > div.marketing-link__body > h3.marketing-link__title

These are opportunities to improve the legibility of your content.

○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
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●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
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○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.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.ucdavis.edu/ line 1011, col 0
Error while parsing the 'sandbox' attribute: 'allow-top-nav', 'igation-by-user-activation' are invalid sandbox flags.
www.ucdavis.edu/ranking-mask-sprite.png
Failed to load resource: the server responded with a status of 404 ()
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

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.

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●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`

Send Feedback