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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.

45

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
static.wm.edu/mweb/prod/main.min.css?v=1117250.0 ms456.7 KiB
www.wm.edu/_homepage/_media/statistic-row-bg-base-comp.jpg0.0 ms278.8 KiB
www.wm.edu/_homepage/_media/events_banner.jpg0.0 ms218.0 KiB
www.wm.edu/peopleofwm/_images/tucker-peters-large-comp.jpg0.0 ms112.1 KiB
/signals/config/652765687601932?v=2.9.303&r=stable&domain...1200.0 s126.2 KiB
cascade-prod.static.wm.edu/_shared/static/js/plugins.js?v=0114250.0 ms97.2 KiB
www.wm.edu/_homepage/_media/callout-otod.jpg0.0 ms92.5 KiB
www.wm.edu/_homepage/_media/webshort1.jpg0.0 ms89.6 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.wm.edu/_homepage/_media/admission-row-photo-admission-aid-comp.jpg0.0 ms83.0 KiB
www.wm.edu/_homepage/_media/admission-row-photo-visits-tours-comp.jpg0.0 ms80.5 KiB
www.wm.edu/_homepage/_media/admission-row-photo-base-comp.jpg0.0 ms79.1 KiB
www.wm.edu/_homepage/_media/admission-row-photo-campus-life-comp.jpg0.0 ms71.6 KiB
www.wm.edu/_homepage/_media/admission-row-photo-research-comp.jpg0.0 ms70.3 KiB
cascade-prod.static.wm.edu/_shared/static/js/vendor/jquery.min.js0.0 ms33.2 KiB
www.wm.edu/_homepage/_media/webshort1.mp40.0 ms21.3 KiB
www.wm.edu/css/homepage/home_postloaded.css0.0 ms15.5 KiB
js.adsrvr.org/up_loader.3.0.0.js0.0 ms12.3 KiB
www.wm.edu/img/wm_wordmark_single_line_white.png0.0 ms10.0 KiB
cascade-prod.static.wm.edu/_shared/static/js/rave-alerts.js?v=012220260.0 ms9.2 KiB
www.wm.edu/js/vendor/modernizr-2.6.2-respond-1.1.0.min.js0.0 ms8.2 KiB
www.wm.edu/js/main.js?v=0219260.0 ms6.8 KiB
www.wm.edu/images/wm_vertical_single_line.svg0.0 ms6.4 KiB
www.wm.edu/js/homepage/homepage_postloaded_rows.js0.0 ms6.2 KiB
kit.fontawesome.com/270bb58298.js60.0 s5.7 KiB
www.wm.edu/_homepage/_media/wm_logo_cypher_black.svg0.0 ms5.5 KiB
kit.fontawesome.com/a7cfa831e8.js60.0 s5.4 KiB
assets.tvscipixel.com/tvscientific-pix-o-f87f766d-b243-42ef-83b1-38c2909b380c.js3600.0 s5.9 KiB
www.wm.edu/js/vendor/aos/aos.js0.0 ms4.7 KiB
app-script.monsido.com/v2/monsido-script.js300.0 s3.7 KiB
heatmaps.monsido.com/v1/heatmaps.js300.0 s3.3 KiB
www.wm.edu/images/wm-menu-banner.svg0.0 ms2.6 KiB
www.wm.edu/images/wm_logo_horizontal_green_gold.svg0.0 ms2.5 KiB
www.wm.edu/js/vendor/aos/aos.css0.0 ms2.5 KiB
cascade-prod.static.wm.edu/_shared/static/js/_secondary-pages.js?v=0425250.0 ms2.4 KiB
www.wm.edu/css/custom.css?v=10.0 ms1.3 KiB
/_shared/static/js/_js-imports/init_filetype_aria_labels.js0.0 ms1.1 KiB
www.google.com/cse/static/style/look/v4/minimalist.css3000.0 s1.2 KiB
js.adsrvr.org/universal_pixel.js0.0 ms958 B
www.wm.edu/images/menu-mag.svg0.0 ms886 B
cascade-prod.static.wm.edu/_shared/static/js/_js-imports/_run_tests_var.js0.0 ms877 B
/_shared/static/js/_js-imports/text_make_long_links_wrap.js0.0 ms873 B
/config/edu/9f58a8d3-431f-4138-9499-e523caaf03a5.js?v=3.5...0.0 ms470 B
/tr/?id=652765687601932&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms18 B
/p.css?s=1&k=hsm3jlb&ht=tk&f=2001.2002.6862.6863.6864.686...604800.0 s172 B
www.wm.edu/_homepage/_media/webshort1.mp40.0 ms0 B
www.wm.edu/_homepage/_media/webshort1.mp40.0 ms0 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:0.62574] map[node:map[boundingRect:map[bottom:852 height:852 left:0 right:1350 top:0 width:1350] lhId:page-18-DIV nodeLabel:Ambient video of scenes of life at William & Mary: aerial view of the historic … path:1,HTML,2,BODY,7,MAIN,2,SECTION,2,DIV,0,DIV,1,DIV selector:section.o-homehero > div.o-homehero__content > div.m-hero > div.m-hero__video snippet:<div class="m-hero__video"> type:node] score:0.62574]]

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
/af/b80b73/000000000000000077359971/31/l?primer=7cdcb44be...30 ms
/af/03678c/00000000000000007735a1e4/31/l?primer=7cdcb44be...30 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-13.woff230 ms
/af/a39f99/00000000000000007735a1d1/31/l?primer=7cdcb44be...25 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff225 ms
/af/a02b99/000000000000000077359975/31/l?primer=7cdcb44be...20 ms
/af/c0027e/00000000000000007735994f/31/l?primer=7cdcb44be...20 ms
/af/06e0fa/000000000000000077359943/31/l?primer=7cdcb44be...20 ms
/af/03b399/00000000000000007735a1de/31/l?primer=7cdcb44be...10 ms
/af/e16bae/00000000000000007735a1c8/31/l?primer=7cdcb44be...5.0 ms
/af/3ea8d0/00000000000000007735a1e1/31/l?primer=7cdcb44be...5.0 ms
/af/8590ad/00000000000000007735a1c5/31/l?primer=7cdcb44be...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:58.869 source:map[column:49 line:724 type:source-location url:https://www.wm.edu/js/main.js?v=021926 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:41.893 source:map[type:text value:[unattributed]]] map[reflowTime:0.986 source:map[column:31201 line:1 type:source-location url:https://cascade-prod.static.wm.edu/_shared/static/js/vendor/jquery.min.js urlProvider:network]] map[reflowTime:63.853 source:map[column:22 line:617 type:source-location url:https://www.wm.edu/js/main.js?v=021926 urlProvider:network]] map[reflowTime:10.014 source:map[column:13837 line:0 type:source-location url:https://www.wm.edu/js/vendor/aos/aos.js urlProvider:network]] map[reflowTime:0.54 source:map[column:24687 line:2 type:source-location url:https://cascade-prod.static.wm.edu/_shared/static/js/vendor/jquery.min.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
A person laughs while standing in a room near people sitting at tables with lap… a > div.m-listimage > div.m-listimage__inner > img.m-listimage__img
/wp-content/uploads/2026/04/21163805/iic-1260-222.jpg400.1 KiB387.2 KiB
Rachel Chung a > div.m-listimage > div.m-listimage__inner > img.m-listimage__img
wmit-news-prod.s3.amazonaws.com/wp-content/uploads/2026/04/22132624/tack-900.jpg113.7 KiB100.8 KiB
Wouldn’t want to be anywhere else 💚💛 #williamandmary | #wmInSpring div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/387194023.jpg?width...79.9 KiB72.3 KiB
Those trees across campus are more than just beautiful scenery 🌳👀 William & M… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/386574107.jpg?width...79.3 KiB68.9 KiB
To-do list: enjoy every second of this weather ✅ #williamandmary | #wmInSpring div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/387367829.jpg?width...70.8 KiB63.2 KiB
Picture yourself here 📍 #williamandmary | #wmInSpring div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/387547530.jpg?width...70.6 KiB63.0 KiB
From div.griditem > a > figure > img
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/387732652.jpg?width...59.9 KiB52.3 KiB
Fifty years of stewardship, countless discoveries. The work at @monroehighland… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/386945948.jpg?width...55.1 KiB47.5 KiB
When every corner of campus turns into a photo shoot ☀️ #williamandmary | #wmIn… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/386863046.jpg?width...54.4 KiB46.9 KiB
div.wm-row__mainWrapper > div.wm-row__mainWrapper > div.wm-split__side > img.HomeAdmission__image div.wm-row__mainWrapper > div.wm-row__mainWrapper > div.wm-split__side > img.HomeAdmission__image
www.wm.edu/_homepage/_media/admission-row-photo-base-comp.jpg78.8 KiB38.3 KiB
333 years & counting 💚 💛 Thank you to the students, alumni, families & friends… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/384910460.jpg?width...42.8 KiB32.3 KiB
Same campus, different tempo. Hope you’re having a great break! #williamandma… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/386281184.jpg?width...37.1 KiB26.7 KiB
div.m-hero > div.m-hero__video > div.videocontainer > video#hero_video div.m-hero > div.m-hero__video > div.videocontainer > video#hero_video
www.wm.edu/_homepage/_media/webshort1.jpg89.3 KiB25.0 KiB
333 years of leadership, learning & service. Charter Day honors where William &… div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/385032935.jpg?width...32.8 KiB22.4 KiB
Spring glow > everything else #williamandmary | #wmInSpring div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/386661200.jpg?width...32.5 KiB22.1 KiB
Some like it silent. Some need a little background noise to get their brain in … div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/385989057.jpg?width...26.5 KiB17.6 KiB
Staring at the blank page before you... and filling it with memories from last … div.griditem > a > figure > img.sr-only
/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/387154779.jpg?width...16.3 KiB12.9 KiB
William & Mary home section.o-homehero > div.m-desktoplogo > a.wm-topbar__logo-link > img
www.wm.edu/img/wm_wordmark_single_line_white.png9.7 KiB8.4 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-12-VIDEO
nodeLabel: div.m-hero > div.m-hero__video > div.videocontainer > video#hero_video
path: 1,HTML,2,BODY,7,MAIN,2,SECTION,2,DIV,0,DIV,1,DIV,0,DIV,1,VIDEO
selector: div.m-hero > div.m-hero__video > div.videocontainer > video#hero_video
snippet: <video aria-describedby="video_description" autoplay="autoplay" data-name="featureVideo" id="hero_video" loop="loop" muted="" playsinline="" poster="https://www.wm.edu/_homepage/_media/webshort1.jpg" preload="auto" tabindex="-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
www.google.com/cse/static/element/26b8d00a7c7a0812/default_v2+en.css8.8 KiB304 ms
www.google.com/cse/static/style/look/v4/minimalist.css1.2 KiB304 ms
use.typekit.net/hsm3jlb.css2.0 KiB211 ms
cascade-prod.static.wm.edu/_shared/static/js/vendor/jquery.min.js33.2 KiB354 ms
static.wm.edu/mweb/prod/main.min.css?v=111725456.7 KiB1.1 s
cascade-prod.static.wm.edu/_shared/static/js/rave-alerts.js?v=012220269.2 KiB263 ms
www.wm.edu/js/vendor/modernizr-2.6.2-respond-1.1.0.min.js8.2 KiB182 ms
/p.css?s=1&k=hsm3jlb&ht=tk&f=2001.2002.6862.6863.6864.686...172 B202 ms
www.wm.edu/css/custom.css?v=11.3 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: 501 ms
URLTime Spent
wm.edu/501 ms
www.wm.edu/0.0 ms

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
Ambient video of scenes of life at William & Mary: aerial view of the historic … section.o-homehero > div.o-homehero__content > div.m-hero > div.m-hero__video
0.626

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: 190 ms 534.5 KiB
URLTransfer SizeEst Savings
static.wm.edu/mweb/prod/main.min.css?v=111725455.9 KiB420.9 KiB
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…102.9 KiB102.2 KiB
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…11.4 KiB11.4 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: 120 ms 467.6 KiB
URLTransfer SizeEst Savings
cascade-prod.static.wm.edu/_shared/static/js/plugins.js?v=01142596.9 KiB81.6 KiB
www.googletagmanager.com/gtag/js?id=G-43SDREREDN&cx=c&gtm=4e64k0171.7 KiB69.0 KiB
www.googletagmanager.com/gtag/js?id=G-2310WV201G157.0 KiB63.9 KiB
www.googletagmanager.com/gtag/js?id=G-NTEL3PV6DW&cx=c&gtm=4e64k0153.2 KiB63.5 KiB
www.googletagmanager.com/gtag/js?id=AW-10858719247&cx=c&gtm=4e64k0144.4 KiB61.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-ND77N3174.6 KiB58.6 KiB
/signals/config/652765687601932?v=2.9.303&r=stable&domain...126.1 KiB35.9 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB34.0 KiB

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 7.9 KiB
URLTransfer SizeEst Savings
www.wm.edu/css/homepage/home_postloaded.css15.5 KiB5.2 KiB
www.google.com/cse/static/element/26b8d00a7c7a0812/default_v2+en.css8.8 KiB2.7 KiB

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 9.6 KiB
URLTransfer SizeEst Savings
www.wm.edu/js/main.js?v=0219266.5 KiB3.7 KiB
www.wm.edu/js/homepage/homepage_postloaded_rows.js5.9 KiB3.2 KiB
cascade-prod.static.wm.edu/_shared/static/js/rave-alerts.js?v=012220268.8 KiB2.8 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
www.wm.edu/_homepage/_media/webshort1.mp45.3 MiB
static.wm.edu/mweb/prod/main.min.css?v=111725456.7 KiB
www.wm.edu/_homepage/_media/webshort1.mp4429.5 KiB
/wp-content/uploads/2026/04/21163805/iic-1260-222.jpg400.5 KiB
www.wm.edu/_homepage/_media/statistic-row-bg-base-comp.jpg278.8 KiB
/v1/feeds/6e96bd0a-830a-46a0-8bfa-f8e132cd9bab/posts?api_...269.8 KiB
www.wm.edu/_homepage/_media/events_banner.jpg218.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-ND77N3174.7 KiB
www.googletagmanager.com/gtag/js?id=G-43SDREREDN&cx=c&gtm=4e64k0171.7 KiB
www.googletagmanager.com/gtag/js?id=G-2310WV201G157.3 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
Tucker Peters ’28 div.m-people-main__bottom > div#p1 > div.m-person__image > img
www.wm.edu/peopleofwm/_images/tucker-peters-large-comp.jpg
William & Mary home section.o-homehero > div.m-desktoplogo > a.wm-topbar__logo-link > img
www.wm.edu/img/wm_wordmark_single_line_white.png
William & Mary logo div.o-wm-footer__logo-column > div > a > img
www.wm.edu/images/wm_vertical_single_line.svg
William & Mary div.wm-topbar > div.wm-topbar__logo > a.wm-topbar__logo-link > img#top_mark
www.wm.edu/images/wm_logo_horizontal_green_gold.svg

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

●Max Potential First Input Delay 80 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 16 user timings
●JavaScript execution time 0.5 s
●Minimizes main-thread work 1.8 s
●Avoid long main-thread tasks 7 long tasks found
●Avoid non-composited animations 75 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 120 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
○INP breakdown
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
●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
●`[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
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`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 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
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
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
AttributionReporting
connect.facebook.net/en_US/fbevents.js line 279, col 769
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate 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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