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Lighthouse Desktop

· 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.

76

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.

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.

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:44.689 source:map[type:text value:[unattributed]]]]

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
Person using a VR headset to explore an immersive learning environment. div.d-flex > div.content-section > div.image-holder > img
/sites/default/files/styles/block_image_16_25_lge/public/...325.6 KiB288.1 KiB
Person examining anatomical model in laboratory. div.d-flex > div.content-section > div.image-holder > img
/sites/default/files/styles/block_image_16_25_lge/public/...227.8 KiB190.2 KiB
Child raising their hand while using a laptop in a classroom. div.d-flex > div.content-section > div.image-holder > img
/sites/default/files/styles/block_image_16_25_lge/public/...212.4 KiB174.9 KiB
Repeatedly ranked #1 div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-09/2026RepeatedlyRanked.png58.1 KiB54.9 KiB
One university, many places Polytechnic campus Virtual tour Tempe campus Virtua… article.node > div.row > div.col > div.bg
/profiles/contrib/webspark/themes/renovation/assets/img/b...75.2 KiB42.3 KiB
Top 10 in the U.S. for best online bachelors programs div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2026-03/top-online-bachelors.png39.0 KiB36.8 KiB
A top producer of Fulbright students div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2026-03/Fulbright2026.png38.8 KiB36.7 KiB
#2 in the U.S. for employability div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/2employability2026.png37.9 KiB35.8 KiB
Gilman Scholar Madison Eklund div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-03/homepagebox-Gilman-Scholars-ranking.jpg28.8 KiB16.0 KiB
Barrett is the "gold standard" among the nation's honors colleges div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-01/homepagebox-BarrettGold.jpg25.8 KiB14.4 KiB
LED wall div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepqagebox-AZ-Tech-Week.jpg24.7 KiB13.7 KiB
#3 in the U.S. for first-year experiences div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/3first-year_2026.png16.2 KiB12.4 KiB
Old Main div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-prestigious-positions.jpg18.4 KiB10.2 KiB
Artist rendering of ASU Health headquarters div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-ASU-Health-facility.jpg18.2 KiB10.1 KiB
#5 in the U.S. for undergraduate teaching div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/5underTeaching2026.png12.6 KiB9.6 KiB
will.i.am teaching a class div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-will.i.am_.jpg13.3 KiB7.4 KiB
Arizona State University logo div.header-main > div.navbar > a.sc-gsFSXq > img.vert
/profiles/contrib/webspark/modules/asu_brand/node_modules...4.7 KiB4.3 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-17-VIDEO
nodeLabel: div.layout__region > div.block > div.uds-hero-lg > video#media-video
path: 1,HTML,1,BODY,4,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,2,VIDEO
selector: div.layout__region > div.block > div.uds-hero-lg > video#media-video
snippet: <video id="media-video" preload="auto" autoplay="" muted="" loop="" playsinline="">

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.

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: 247 ms
URLTime Spent
asu.edu/247 ms
www.asu.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

Diagnostics

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.

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 3.1 KiB
URLTransfer SizeEst Savings
cassie.web.asu.edu/cassie-fullwidth.js6.1 KiB3.1 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: 0.0 ms 80.2 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
Repeatedly ranked #1 div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-09/2026RepeatedlyRanked.png
#2 in the U.S. for employability div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/2employability2026.png
A top producer of Fulbright students div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2026-03/Fulbright2026.png
Top 10 in the U.S. for best online bachelors programs div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2026-03/top-online-bachelors.png
#3 in the U.S. for first-year experiences div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/3first-year_2026.png
#5 in the U.S. for undergraduate teaching div.glide__track > ul.glide__slides > li.glide__slide > img
www.asu.edu/sites/default/files/2025-10/5underTeaching2026.png
Artist rendering of ASU Health headquarters div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-ASU-Health-facility.jpg
will.i.am teaching a class div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-will.i.am_.jpg
Barrett is the "gold standard" among the nation's honors colleges div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-01/homepagebox-BarrettGold.jpg
Old Main div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepagebox-prestigious-positions.jpg
LED wall div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-04/homepqagebox-AZ-Tech-Week.jpg
Gilman Scholar Madison Eklund div.mt-5 > div.excellence-card > div.image-holder > img
www.asu.edu/sites/default/files/2026-03/homepagebox-Gilman-Scholars-ranking.jpg

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

●Max Potential First Input Delay 80 ms
●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 8 user timings
●JavaScript execution time 0.6 s
●Minimizes main-thread work 1.2 s
●Avoid long main-thread tasks 3 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 50 ms
●Server Backend Latencies 1,040 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Find my degree program div.row > div.layout__region > div.asu-edu-components-find-my-degree-program > h3
Experience world-class academics div.content-section > div.content-holder > div.content-bg > h3

These are opportunities to improve keyboard navigation in your application.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Slide 1 of 6 div.slider-wrapper > section#main-slider > div.glide__track > ul.glide__slides

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●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
●Input buttons have discernible text.
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●Select elements have associated label elements.
●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
●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.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
○`[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 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 type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○Elements with visible text labels have matching accessible names.
○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
Failed to load resource: net::ERR_NAME_NOT_RESOLVED
Failed to load resource: net::ERR_NAME_NOT_RESOLVED
Failed to load resource: net::ERR_NAME_NOT_RESOLVED
TypeError: Cannot read properties of null (reading 'parentNode') at G (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:516:3854) at n (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:516:1528)
TypeError: Cannot read properties of null (reading 'textContent') at https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:559:379 at NodeList.forEach (<anonymous>) at M (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:559:326) at n (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:516:1528)
TypeError: Cannot read properties of undefined (reading 'register') at X (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:559:1699) at n (https://www.asu.edu/sites/default/files/js/js_0OYodIqwTeBsJl3-9TXz8JovBEEsETCCFsjjb5aW7Wg.js?scope=footer&delta=0&language=en&theme=asu_edu&include=eJxtjm1WxCAMRTdUhiX1pPCs2JRgCDp19YOMTo8ffyBcXm5Ctc2IzVc7GNM7llpIt3lhCVv1v94TfaWlWNrTB_gY6EnEoP5-uZF9RNNOK1yXEDNdv_EcZC-Ska36lVPEZZwv5wjKvdMQ3Wvr1geuJppQHa4BzMgB_yn_okmR5Y0sSfZGy9LFhTL4HKiUt5RXF0ilVfAUROGjtkJ8qdZ3-SF5hgru3QoKNo_4KN1nOX6WLo3-3MJx6kiPG9hPkvc:516:1528)

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●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
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
85

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 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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