Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
ucsd.edu/_images/homepage/img-triton-giving-day-26-700x400.png	0.0 ms	7.3 MiB
ucsd.edu/_images/homepage/img-research-mod-ga-fusion.jpg	0.0 ms	836.6 KiB
ucsd.edu/_images/homepage/img-feat-us-news-grad-schools-26.jpg	0.0 ms	669.3 KiB
ucsd.edu/_images/homepage/img-hero-you-belong-here-final.jpg	0.0 ms	282.6 KiB
ucsd.edu/_images/arts/arts-ucsd-homepage.jpg	0.0 ms	241.5 KiB
ucsd.edu/_images/homepage/img-visiting-and-tours-module-1400x377.jpg	0.0 ms	77.1 KiB
ucsd.edu/_images/homepage/img-homepage-student-life-1400x469-5.jpg	0.0 ms	75.8 KiB
ucsd.edu/_images/about/economic-impact-report/img-stats-top-ten.jpg	0.0 ms	69.4 KiB
www.ucsd.edu/_resources/img/bg-orbs-1-mobile.jpg	0.0 ms	59.8 KiB
ucsd.edu/_images/homepage/img-always-moving-discovery-fwd-720x480.jpg	0.0 ms	59.1 KiB
ucsd.edu/_images/homepage/img-financial-aid-scholorships.jpg	0.0 ms	52.9 KiB
ucsd.edu/_images/homepage/img-homepage-stats-sio-pier-780x640.jpg	0.0 ms	48.4 KiB
ucsd.edu/_images/homepage/img-homepage-stats-clarivate-760x840.jpg	0.0 ms	46.2 KiB
/_images/about/economic-impact-report/img-stats-number-on...	0.0 ms	44.3 KiB
www.ucsd.edu/_resources/fonts/refrigerator_deluxe_extrabold/font.woff2	0.0 ms	43.9 KiB
www.ucsd.edu/_resources/img/bg-grit-combo-8-mobile.jpg	0.0 ms	37.8 KiB
www.ucsd.edu/_resources/bootstrap/fonts/glyphicons-halflings-regular.woff	0.0 ms	23.1 KiB
www.ucsd.edu/_resources/img/overlay-glow-small-1.png	0.0 ms	14.9 KiB
ucsd.edu/_resources/vid/you-belong-here-cut.mov	0.0 ms	14.6 KiB
www.ucsd.edu/_resources/img/logo_UCSD.png	0.0 ms	11.8 KiB
www.ucsd.edu/_resources/img/icon_tw.png	0.0 ms	10.6 KiB
www.ucsd.edu/_resources/img/logo_UCSD_white.png	0.0 ms	10.5 KiB
pixel.byspotify.com/ping.min.js	3600.0 s	10.3 KiB
snap.licdn.com/li.lms-analytics/insight.min.js	86400.0 s	18.7 KiB
static.hotjar.com/c/hotjar-3662797.js?sv=7	60.0 s	6.2 KiB
www.ucsd.edu/_resources/img/icon_bsky.png	0.0 ms	4.5 KiB
www.ucsd.edu/_resources/img/icon_ig.png	0.0 ms	4.4 KiB
www.ucsd.edu/_resources/css/vendor/ajax-loader.gif	0.0 ms	4.3 KiB
js.ipredictive.com/adelphic_universal_pixel.js	0.0 ms	3.5 KiB
www.ucsd.edu/_resources/img/icon_tiktok.png	0.0 ms	3.2 KiB
www.ucsd.edu/_resources/img/icon_linked.png	0.0 ms	3.1 KiB
www.ucsd.edu/_resources/img/icon_fb.png	0.0 ms	2.9 KiB
www.ucsd.edu/_resources/img/overlay-hero-tab-mobile.png	0.0 ms	2.8 KiB
www.ucsd.edu/_resources/img/icon_search.png	0.0 ms	1.6 KiB
www.ucsd.edu/_resources/img/icon_check.png	0.0 ms	1.2 KiB
/collect?v=2&fmt=js&pid=46649&time=1776798566562&url=http...	0.0 ms	910 B
www.ucsd.edu/_resources/img/icon_arrow.png	0.0 ms	440 B
hello.myfonts.net/count/31ba49	604800.0 s	371 B
ucsd.edu/_resources/vid/you-belong-here-cut.mov	0.0 ms	0 B
ucsd.edu/_resources/vid/you-belong-here-cut.mov	0.0 ms	0 B
ucsd.edu/_resources/vid/you-belong-here-cut.mov	0.0 ms	0 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.

URL	Est Savings
www.ucsd.edu/_resources/bootstrap/fonts/glyphicons-halflings-regular.woff	500 ms
www.ucsd.edu/_resources/fonts/refrigerator_deluxe_extrabold/font.woff2	360 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.parallax-container > div.pi-container > div.pi-img-container > img.pi-image `div.parallax-container > div.pi-container > div.pi-img-container > img.pi-image`	ucsd.edu/_images/homepage/img-triton-giving-day-26-700x400.png	7.3 MiB	7.1 MiB
Computing infrastructure with blue and green lights `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-research-mod-ga-fusion.jpg	835.5 KiB	823.4 KiB
Geisel Library lit up against blue evening sky `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-feat-us-news-grad-schools-26.jpg	668.4 KiB	656.3 KiB
The title wall of Imagine Wild: Mountain Yellow-legged Frog features large, car… `div.news > a.news-item > div.news-content > img#nwe_img0`	/teaser_uploads/_ucsd-feed/Birch_Aquarium_-_Imagine_Wild_...	84.8 KiB	73.5 KiB
Two images, each of a person gesturing with hands while speaking on stage `div.news > a.news-item > div.news-content > img#nwe_img2`	today.ucsd.edu/teaser_uploads/_ucsd-feed/grad-slam-postdoc-teaser.jpeg	59.5 KiB	48.2 KiB
people in lab `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-always-moving-discovery-fwd-720x480.jpg	58.8 KiB	46.7 KiB
Man fires a piece of glass in the shape of a whale fin `div.news > a.news-item > div.news-content > img#nwe_img1`	today.ucsd.edu/teaser_uploads/_ucsd-feed/Glass-Center-Teaser.jpg	53.1 KiB	41.7 KiB
div.parallax-container > div.pi-container > div.pi-img-container > img.pi-image `div.parallax-container > div.pi-container > div.pi-img-container > img.pi-image`	ucsd.edu/_images/arts/arts-ucsd-homepage.jpg	241.1 KiB	32.4 KiB
twitter `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_tw.png	10.4 KiB	9.6 KiB
Brand `div.navbar-header > a.navbar-brand > span > img`	www.ucsd.edu/_resources/img/logo_UCSD.png	11.6 KiB	9.2 KiB
UC San Diego `div.row > div.col-xs-6 > a.footer-brand > img.img-responsive`	www.ucsd.edu/_resources/img/logo_UCSD_white.png	10.3 KiB	9.0 KiB
ATTEND UC SAN DIEGO Your journey is unique—whether as a first-generation stude… `body.page-homepage > div#a-main > section.jumbotron`	www.ucsd.edu/_resources/img/bg-orbs-1-mobile.jpg	59.6 KiB	7.7 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:467.167 label:Time to first byte subpart:timeToFirstByte] map[duration:10.869 label:Resource load delay subpart:resourceLoadDelay] map[duration:2374.235 label:Resource load duration subpart:resourceLoadDuration] map[duration:131.527 label:Element render delay subpart:elementRenderDelay]]

lhId: page-12-SECTION

nodeLabel: YOU BELONG HERE FIND YOUR PLACE

path: 1,HTML,1,BODY,4,DIV,0,SECTION

selector: body.page-homepage > div#a-main > section.jumbotron

snippet: <section aria-label="Introduction" class="jumbotron jumbotron-hero jumbotron-hero-lg jumbotron-hero-vid" data-module="hero-homepage" style="background-image: url(_images/homepage/img-hero-you-belong-here-final.jpg);">

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-SECTION

nodeLabel: YOU BELONG HERE FIND YOUR PLACE

path: 1,HTML,1,BODY,4,DIV,0,SECTION

selector: body.page-homepage > div#a-main > section.jumbotron

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.ucsd.edu/_resources/css/vendor/brix_sans.css	2.0 MiB	11.7 s
www.ucsd.edu/_resources/css/vendor/animate.css	70.9 KiB	324 ms
www.ucsd.edu/_resources/css/custom.css	188.6 KiB	972 ms
www.ucsd.edu/_resources/css/styles.css	194.4 KiB	1.3 s
www.ucsd.edu/_resources/css/vendor/font-awesome.css	34.7 KiB	324 ms
www.ucsd.edu/_resources/css/vendor/slick-theme.css	3.3 KiB
www.ucsd.edu/_resources/css/vendor/slick.css	1.9 KiB
www.ucsd.edu/_resources/css/vendor/refrigerator_deluxe.css	1.1 KiB	324 ms
www.ucsd.edu/_resources/css/modules/uikit-cards.css	3.4 KiB
ucsd.edu/_resources/css/custom-img.css	20.6 KiB	302 ms
hello.myfonts.net/count/31ba49	371 B	816 ms

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.

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

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: 3.6 s 715.3 KiB

URL	Transfer Size	Est Savings
www.ucsd.edu/_resources/css/vendor/brix_sans.css	2.0 MiB	646.4 KiB
www.ucsd.edu/_resources/css/custom.css	188.6 KiB	29.2 KiB
www.ucsd.edu/_resources/css/styles.css	194.4 KiB	17.2 KiB
www.ucsd.edu/_resources/css/vendor/animate.css	70.9 KiB	15.1 KiB
www.ucsd.edu/_resources/css/vendor/font-awesome.css	34.7 KiB	5.4 KiB
ucsd.edu/_resources/css/custom-img.css	20.6 KiB	2.1 KiB

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: 13.0 s 2.5 MiB

URL	Transfer Size	Est Savings
www.ucsd.edu/_resources/css/vendor/brix_sans.css	2.0 MiB	2.0 MiB
www.ucsd.edu/_resources/css/styles.css	193.9 KiB	177.4 KiB
www.ucsd.edu/_resources/css/custom.css	188.2 KiB	171.8 KiB
www.ucsd.edu/_resources/css/vendor/animate.css	70.6 KiB	70.3 KiB
www.ucsd.edu/_resources/css/vendor/font-awesome.css	34.4 KiB	34.2 KiB
ucsd.edu/_resources/css/custom-img.css	20.4 KiB	19.0 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: 910 ms 322.8 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-ZBPHLZYTS4&cx=c&gtm=4e64h1	153.2 KiB	63.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-K826VG	174.1 KiB	59.4 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js	105.2 KiB	56.9 KiB
www.googletagmanager.com/gtag/js?id=AW-17658733768&cx=c&gtm=4e64h1	145.7 KiB	55.3 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js	56.1 KiB	37.8 KiB
www.ucsd.edu/_resources/bootstrap/javascripts/bootstrap.min.js	36.2 KiB	29.6 KiB
www.ucsd.edu/_resources/js/myscripts.js	37.4 KiB	20.7 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 reason	Failure type
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not actionable

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 22.2 KiB

URL	Transfer Size	Est Savings
www.ucsd.edu/_resources/js/myscripts.js	37.4 KiB	15.6 KiB
www.ucsd.edu/_resources/js/vendor/jquery.matchHeight.js	11.4 KiB	6.6 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.

URL	Transfer Size
ucsd.edu/_resources/vid/you-belong-here-cut.mov	7.5 MiB
ucsd.edu/_images/homepage/img-triton-giving-day-26-700x400.png	7.3 MiB
www.ucsd.edu/_resources/css/vendor/brix_sans.css	2.0 MiB
ucsd.edu/_images/homepage/img-research-mod-ga-fusion.jpg	836.6 KiB
ucsd.edu/_images/homepage/img-feat-us-news-grad-schools-26.jpg	669.3 KiB
ucsd.edu/_images/homepage/img-hero-you-belong-here-final.jpg	282.6 KiB
ucsd.edu/_images/arts/arts-ucsd-homepage.jpg	241.5 KiB
www.ucsd.edu/_resources/css/styles.css	194.4 KiB
www.ucsd.edu/_resources/css/custom.css	188.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-K826VG	174.4 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
Unattributable	711 ms	73 ms	0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-K826VG	602 ms	530 ms	59 ms
ucsd.edu/	593 ms	54 ms	4.7 ms
www.googletagmanager.com/gtag/js?id=AW-17658733768&cx=c&gtm=4e64h1	226 ms	199 ms	26 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js	209 ms	156 ms	50 ms
www.googletagmanager.com/gtag/js?id=G-ZBPHLZYTS4&cx=c&gtm=4e64h1	208 ms	174 ms	32 ms
ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js	135 ms	93 ms	7.7 ms
script.hotjar.com/modules.6a0f3932cb1341a35c18.js	134 ms	111 ms	19 ms
www.ucsd.edu/_resources/js/myscripts.js	125 ms	81 ms	3.0 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.6 s
Other	909 ms
Style & Layout	256 ms
Script Parsing & Compilation	251 ms
Rendering	129 ms
Parse HTML & CSS	90 ms

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
Geisel Library lit up against blue evening sky `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-feat-us-news-grad-schools-26.jpg
Computing infrastructure with blue and green lights `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-research-mod-ga-fusion.jpg
people in lab `div.row > div.col-md-6 > div > img.img-responsive`	ucsd.edu/_images/homepage/img-always-moving-discovery-fwd-720x480.jpg
The title wall of Imagine Wild: Mountain Yellow-legged Frog features large, car… `div.news > a.news-item > div.news-content > img#nwe_img0`	/teaser_uploads/_ucsd-feed/Birch_Aquarium_-_Imagine_Wild_...
Man fires a piece of glass in the shape of a whale fin `div.news > a.news-item > div.news-content > img#nwe_img1`	today.ucsd.edu/teaser_uploads/_ucsd-feed/Glass-Center-Teaser.jpg
Two images, each of a person gesturing with hands while speaking on stage `div.news > a.news-item > div.news-content > img#nwe_img2`	today.ucsd.edu/teaser_uploads/_ucsd-feed/grad-slam-postdoc-teaser.jpeg
Brand `div.navbar-header > a.navbar-brand > span > img`	www.ucsd.edu/_resources/img/logo_UCSD.png
UC San Diego `div.row > div.col-xs-6 > a.footer-brand > img.img-responsive`	www.ucsd.edu/_resources/img/logo_UCSD_white.png
tiktok `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_tiktok.png
Bluesky `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_bsky.png
facebook `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_fb.png
instagram `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_ig.png
twitter `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_tw.png
linkedin `ul.list-inline > li > a > img`	www.ucsd.edu/_resources/img/icon_linked.png

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

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 60 ms

●User Timing marks and measures 10 user timings

●Avoid long main-thread tasks 9 long tasks found

●Network Requests

●Network Round Trip Times 170 ms

●Server Backend Latencies 290 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 160 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○Avoid non-composited animations

Accessibility

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
In the world for powering global innovation. `div.slide > div.text > div.v-align > p`
Public university in the nation for research. `div.slide > div.text > div.v-align > p`
Featured in: Washington Monthly `div.slide > div.text > div.v-align > span`

These are opportunities to improve the legibility of your content.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.container-fluid > div.container > div.navbar-header > a.search-icon `div.container-fluid > div.container > div.navbar-header > a.search-icon`

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.

Best practices

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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

●`<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

●Skip links are focusable.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●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

○`<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

○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

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

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

○Identical links have the same purpose.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
AttributionReporting	snap.licdn.com/li.lms-analytics/insight.min.js

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.

Source	Description
ucsd.edu/	`Access to fetch at 'https://ucsd.enterprise.localist.com/api/2/events?keyword=ucsdcal&days=365&pp=3&distinct=true' from origin 'https://ucsd.edu' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.`
ucsd.edu/ line 730, col 26	`Events API error: TypeError: Failed to fetch at https://ucsd.edu/:691:3 at https://ucsd.edu/:732:3`
/api/2/events?keyword=ucsdcal&days=365&pp=3&distinct=true	`Failed to load resource: net::ERR_FAILED`

●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 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`