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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.

26

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
www.sdsu.edu/_resources/video/arts-and-culture-v3.mp41209600.0 s25.9 MiB
www.sdsu.edu/_resources/images/ocean-beach-pier.png432000.0 s5.9 MiB
www.sdsu.edu/news/2026/04/_images/sdsu-main-campus-aerials.jpg432000.0 s5.1 MiB
www.sdsu.edu/_images/sdsu-students-social-gary-payne-0063.jpg432000.0 s999.0 KiB
www.sdsu.edu/_resources/images/homepage-hero-5-26.jpg432000.0 s959.5 KiB
www.sdsu.edu/news/2026/04/_images/sdsu-team-chula.png432000.0 s847.2 KiB
www.sdsu.edu/_images/centennial-walkway-overlay.jpg432000.0 s626.3 KiB
www.sdsu.edu/news/2026/04/_images/sepulveda-resized.jpg432000.0 s571.6 KiB
www.sdsu.edu/_resources/images/aztec-experience.jpg432000.0 s483.7 KiB
www.sdsu.edu/_resources/images/arts-and-culture-static.jpg432000.0 s443.9 KiB
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js86400.0 s131.0 KiB
/vi/6oLSPnN4e58/sddefault.jpg?sqp=-oaymwEmCIAFEOAD8quKqQM...7200.0 s48.7 KiB
ou-resources.sdsu.edu/crimson/assets/img/student-union.png432000.0 s226.2 KiB
www.sdsu.edu/_resources/images/meet-our-students-aleah.png432000.0 s215.0 KiB
www.sdsu.edu/_resources/images/meet-our-students-kyle.png432000.0 s212.0 KiB
www.sdsu.edu/news/2025/11/images/student-ambassadors.jpg432000.0 s200.3 KiB
www.sdsu.edu/_resources/images/meet-our-students-jr.png432000.0 s199.6 KiB
ou-resources.sdsu.edu/crimson/assets/img/students-in-eis.png432000.0 s197.3 KiB
ou-resources.sdsu.edu/crimson/assets/img/library-interior.png432000.0 s195.0 KiB
scripts.clarity.ms/0.8.59/clarity.js86400.0 s26.2 KiB
ou-resources.sdsu.edu/crimson/js/_compiled/main.min.js?v=20260302432000.0 s57.5 KiB
ou-resources.sdsu.edu/crimson/css/main.min.css?v=20260302432000.0 s51.4 KiB
ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js432000.0 s31.6 KiB
/logos/c63ed3ef-c65f-4df6-a5b4-619c126e6aaf/0199ee14-882f...86400.0 s11.1 KiB
learn.go-sandiegostate.org/mtc.js60.0 s4.2 KiB
/scripttemplates/otSDKStub.js?did=0199ee14-882f-7393-9c3d...86400.0 s9.1 KiB
ou-resources.sdsu.edu/images/_sdsu/logo-2022/logo.png432000.0 s11.2 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.5 KiB
www.sdsu.edu/ou-alerts/alerts-config.alerts.js?v=2.0-20210629082832432000.0 s6.4 KiB
/config/edu/90d6d784-d1f0-4505-8a25-16e812445122.js?v=3.5...0.0 ms470 B
ou-resources.sdsu.edu/crimson/assets/fonts/icomoon/icomoon.woff?9tc22l432000.0 s2.7 KiB
www.sdsu.edu/ou-alerts/alerts-config.alerts.css?v=2.0-20210629082833432000.0 s2.4 KiB
cdn.cookielaw.org/logos/static/ot_close.svg86400.0 s643 B
ou-resources.sdsu.edu/crimson/css/oustyles.css432000.0 s1.6 KiB
www.sdsu.edu/_resources/css/crimson/local.css432000.0 s899 B
ou-resources.sdsu.edu/crimson/css/slick/1.8.1/slick.min.css432000.0 s702 B
ou-resources.sdsu.edu/crimson/css/custom.css432000.0 s668 B
ou-resources.sdsu.edu/crimson/js/ouscripts.js432000.0 s659 B
ou-resources.sdsu.edu/crimson/js/onetrust-wrapper.min.js432000.0 s416 B
www.sdsu.edu/_resources/js/crimson/local.js432000.0 s315 B
/p.css?s=1&k=vfx4zws&ht=tk&f=139.140.175.176.5474.5475.25...604800.0 s172 B
static.doubleclick.net/instream/ad_status.js900.0 s0 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
/af/1be3c2/00000000000000007735e606/30/l?primer=f592e0a4b...45 ms
/af/d03e48/000000000000000077359df2/30/l?primer=f592e0a4b...45 ms
/af/40d372/00000000000000007735e607/30/l?primer=f592e0a4b...40 ms
/af/2555e1/00000000000000007735e603/30/l?primer=f592e0a4b...25 ms
/af/23e139/00000000000000007735e605/30/l?primer=f592e0a4b...25 ms
/af/efe4a5/00000000000000007735e609/30/l?primer=f592e0a4b...25 ms
/af/3322cc/00000000000000007735e616/30/l?primer=f592e0a4b...25 ms
ou-resources.sdsu.edu/crimson/assets/fonts/icomoon/icomoon.woff?9tc22l20 ms
use.fontawesome.com/releases/v5.15.4/webfonts/fa-brands-400.woff220 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff210 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:46.663 source:map[column:30333 line:2 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.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:109.933 source:map[type:text value:[unattributed]]] map[reflowTime:49.85 source:map[column:86000 line:1 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js urlProvider:network]] map[reflowTime:0.219 source:map[column:23 line:207 type:source-location url:https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js urlProvider:network]] map[reflowTime:0.099 source:map[column:55 line:881 type:source-location url:https://www.googletagmanager.com/gtag/js?id=G-PQ982Y29GP&cx=c&gtm=4e64h1 urlProvider:network]] map[reflowTime:0.114 source:map[column:45934 line:1 type:source-location url:https://sc-static.net/scevent.min.js urlProvider:network]] map[reflowTime:5.25 source:map[column:272728 line:6 type:source-location url:https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js urlProvider:network]] map[reflowTime:0.373 source:map[column:28298 line:6 type:source-location url:https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js urlProvider:network]] map[reflowTime:5.136 source:map[column:31518 line:1 type:source-location url:https://scripts.clarity.ms/0.8.59/clarity.js urlProvider:network]] map[reflowTime:1.013 source:map[column:51681 line:1 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js urlProvider:network]] map[reflowTime:0.409 source:map[column:52357 line:1 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js urlProvider:network]] map[reflowTime:0.271 source:map[column:52415 line:1 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js urlProvider:network]] map[reflowTime:0.214 source:map[column:52479 line:1 type:source-location url:https://ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.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
div.wrapper > main#main > section.location-section > div.location-section__img div.wrapper > main#main > section.location-section > div.location-section__img
www.sdsu.edu/_resources/images/ocean-beach-pier.png5.9 MiB5.2 MiB
Aerial view of a campus with a blue glass-tinted dome in the foreground and mul… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sdsu-main-campus-aerials.jpg5.1 MiB5.1 MiB
A group of six women and two men stand in a slightly curved line in a meeting r… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sdsu-team-chula.png846.2 KiB807.4 KiB
Centennial walkway and courtyard body > div.wrapper > div.footer-sock > img
www.sdsu.edu/_images/centennial-walkway-overlay.jpg625.9 KiB549.3 KiB
A man in a checkered, button-down shirt is sitting next to a monitor with a top… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sepulveda-resized.jpg571.3 KiB532.5 KiB
The Aztec Experience Life at SDSU Admissions body > div.wrapper > main#main > section.aztec-experience
www.sdsu.edu/_resources/images/aztec-experience.jpg483.3 KiB355.4 KiB
400+ Student Organizations and Clubs div.container > div.column > div.column__col > div.stat3up__holder
ou-resources.sdsu.edu/crimson/assets/img/student-union.png225.9 KiB210.4 KiB
Aleah '21, Journalism SDSU has taught me a lot about my own personal growth and… div.container > div.column > div.column__col > div.stat3up__holder
www.sdsu.edu/_resources/images/meet-our-students-aleah.png214.6 KiB199.1 KiB
Kyle '21, Journalism SDSU taught me commitment, how to be diligent, and motivat… div.container > div.column > div.column__col > div.stat3up__holder
www.sdsu.edu/_resources/images/meet-our-students-kyle.png211.7 KiB196.1 KiB
JR '21, Psychology SDSU built me up for success by granting me so many opportun… div.container > div.column > div.column__col > div.stat3up__holder
www.sdsu.edu/_resources/images/meet-our-students-jr.png199.3 KiB183.8 KiB
$230M Research Funding div.container > div.column > div.column__col > div.stat3up__holder
ou-resources.sdsu.edu/crimson/assets/img/students-in-eis.png197.0 KiB181.5 KiB
202+ Degree Programs div.container > div.column > div.column__col > div.stat3up__holder
ou-resources.sdsu.edu/crimson/assets/img/library-interior.png194.7 KiB179.1 KiB
div.wrapper > main#main > section.optional-panel > div.optional-panel__img div.wrapper > main#main > section.optional-panel > div.optional-panel__img
www.sdsu.edu/news/2025/11/images/student-ambassadors.jpg200.1 KiB152.6 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:155.755 label:Time to first byte subpart:timeToFirstByte] map[duration:287.237 label:Resource load delay subpart:resourceLoadDelay] map[duration:488.068 label:Resource load duration subpart:resourceLoadDuration] map[duration:2421.13 label:Element render delay subpart:elementRenderDelay]]
lhId: page-13-SECTION
nodeLabel: Transform Your Tomorrow
path: 1,HTML,1,BODY,3,DIV,7,MAIN,0,SECTION
selector: body > div.wrapper > main#main > section.hero
snippet: <section class="hero hero_home hero_youtube wow fadeIn" data-paused="false" style="background-image: url(&quot;/_resources/images/homepage-hero-5-26.jpg&quot;);">

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-13-SECTION
nodeLabel: Transform Your Tomorrow
path: 1,HTML,1,BODY,3,DIV,7,MAIN,0,SECTION
selector: body > div.wrapper > main#main > section.hero
snippet: <section class="hero hero_home hero_youtube wow fadeIn" data-paused="false" style="background-image: url(&quot;/_resources/images/homepage-hero-5-26.jpg&quot;);">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
ou-resources.sdsu.edu/crimson/css/main.min.css?v=2026030251.4 KiB2.5 s
ou-resources.sdsu.edu/crimson/css/slick/1.8.1/slick.min.css702 B784 ms
ou-resources.sdsu.edu/crimson/css/oustyles.css1.6 KiB784 ms
use.fontawesome.com/releases/v5.15.4/css/all.css13.8 KiB1.2 s
ou-resources.sdsu.edu/crimson/css/custom.css668 B784 ms
/p.css?s=1&k=vfx4zws&ht=tk&f=139.140.175.176.5474.5475.25...172 B770 ms
www.sdsu.edu/_resources/css/crimson/local.css899 B153 ms
www.sdsu.edu/ou-alerts/alerts-config.alerts.css?v=2.0-202106290828332.4 KiB153 ms
use.typekit.net/vfx4zws.css1.5 KiB761 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

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: 795 ms
URLTime Spent
sdsu.edu/795 ms
www.sdsu.edu/0.0 ms

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: 310 ms 80.6 KiB
URLTransfer SizeEst Savings
ou-resources.sdsu.edu/crimson/css/main.min.css?v=2026030251.1 KiB47.3 KiB
22.4 KiB20.0 KiB
use.fontawesome.com/releases/v5.15.4/css/all.css13.4 KiB13.3 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: 1.8 s 335.8 KiB
URLTransfer SizeEst Savings
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js130.8 KiB69.2 KiB
www.googletagmanager.com/gtag/js?id=G-PQ982Y29GP&cx=c&gtm=4e64h1174.0 KiB63.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-P5224TD157.8 KiB60.6 KiB
www.googletagmanager.com/gtag/destination?id=AW-10812186853&cx=c&gtm=4e64h1141.5 KiB59.5 KiB
www.googletagmanager.com/gtag/js?id=AW-17910356512&cx=c&gtm=4e64h1144.7 KiB55.0 KiB
ou-resources.sdsu.edu/crimson/js/_compiled/main.min.js?v=2026030257.3 KiB28.5 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.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable3.7 s545 ms0.0 ms
learn.go-sandiegostate.org/mtc.js967 ms644 ms1.3 ms
www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js915 ms882 ms5.3 ms
www.googletagmanager.com/gtag/destination?id=AW-10812186853&cx=c&gtm=4e64h1855 ms786 ms41 ms
www.googletagmanager.com/gtm.js?id=GTM-P5224TD749 ms589 ms147 ms
sc-static.net/scevent.min.js733 ms544 ms20 ms
ou-resources.sdsu.edu/js/jquery/jquery-3.6.0.min.js713 ms390 ms72 ms
www.sdsu.edu/582 ms9.2 ms4.8 ms
www.googletagmanager.com/gtag/js?id=G-PQ982Y29GP&cx=c&gtm=4e64h1551 ms443 ms105 ms
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js432 ms255 ms123 ms
scripts.clarity.ms/0.8.59/clarity.js318 ms263 ms10 ms
www.googletagmanager.com/gtag/js?id=AW-17910356512&cx=c&gtm=4e64h1265 ms203 ms61 ms
/scripttemplates/otSDKStub.js?did=0199ee14-882f-7393-9c3d...163 ms89 ms56 ms
ou-resources.sdsu.edu/crimson/js/_compiled/main.min.js?v=20260302154 ms130 ms24 ms
/config/edu/90d6d784-d1f0-4505-8a25-16e812445122.js?v=3.5...55 ms52 ms0.4 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.

CategoryTime Spent
Script Evaluation6.2 s
Other3.5 s
Style & Layout706 ms
Script Parsing & Compilation679 ms
Garbage Collection357 ms
Parse HTML & CSS140 ms
Rendering61 ms

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.sdsu.edu/_resources/video/arts-and-culture-v3.mp425.9 MiB
/videoplayback?expire=1776835874&ei=wgjoaYrSB6i8sfIPueGs-...6.9 MiB
www.sdsu.edu/_resources/images/ocean-beach-pier.png5.9 MiB
/videoplayback?expire=1776835910&ei=5gjoaYHsK9qpsfIPybLf0...5.6 MiB
www.sdsu.edu/news/2026/04/_images/sdsu-main-campus-aerials.jpg5.1 MiB
/videoplayback?expire=1776835874&ei=wgjoaYrSB6i8sfIPueGs-...1.5 MiB
/videoplayback?expire=1776835910&ei=5gjoaYHsK9qpsfIPybLf0...1.1 MiB
www.sdsu.edu/_images/sdsu-students-social-gary-payne-0063.jpg999.0 KiB
www.sdsu.edu/_resources/images/homepage-hero-5-26.jpg959.5 KiB
/videoplayback?expire=1776835874&ei=wgjoaYrSB6i8sfIPueGs-...869.5 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
Aerial view of a campus with a blue glass-tinted dome in the foreground and mul… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sdsu-main-campus-aerials.jpg
A man in a checkered, button-down shirt is sitting next to a monitor with a top… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sepulveda-resized.jpg
A group of six women and two men stand in a slightly curved line in a meeting r… div.news-home__items > div.item > div.item__img > img
www.sdsu.edu/news/2026/04/_images/sdsu-team-chula.png
San Diego State University div.global-navigation > div.logo > a > img
ou-resources.sdsu.edu/images/_sdsu/logo-2022/logo.png
San Diego State University div.logo-block > div.logo > a > img
ou-resources.sdsu.edu/images/_sdsu/logo-2022/logo.png

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

●Layout shift culprits
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 30 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 2 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 80 ms
●Server Backend Latencies 210 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 50 ms
●Avoid large layout shifts 2 layout shifts found
○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
●`[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
●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.
●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
●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
○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.
○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 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
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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