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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.

28

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
bloomington.iu.edu/images/samplegates.jpg0.0 ms288.3 KiB
/images/home/hoosiers-making-mark/26841_20251112_reputati...0.0 ms270.3 KiB
/images/home/hoosiers-making-mark/26664_20251105_reputati...0.0 ms195.7 KiB
bloomington.iu.edu/images/academics.jpg0.0 ms171.2 KiB
assets.iu.edu/web/3.3.x/css/iu-framework.min.css?2024-09-050.0 ms169.2 KiB
bloomington.iu.edu/images/opportunity.jpg0.0 ms152.7 KiB
bloomington.iu.edu/images/home/hero/hero_home_fire.png0.0 ms123.2 KiB
bloomington.iu.edu/images/home/banner/iu-day-512x768.jpg0.0 ms117.6 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
assets.iu.edu/web/3.3.x/js/iu-framework.min.js0.0 ms84.1 KiB
/images/home/hoosiers-making-mark/26873_ksbkdkocstudentdi...0.0 ms67.0 KiB
fonts.iu.edu/fonts/benton-sans-cond-bold.woff0.0 ms46.3 KiB
fonts.iu.edu/fonts/benton-sans-bold.woff0.0 ms41.6 KiB
fonts.iu.edu/fonts/benton-sans-regular.woff0.0 ms41.0 KiB
/signals/config/661123017718972?v=2.9.303&r=stable&domain...1200.0 s46.1 KiB
siteimproveanalytics.com/js/siteanalyze_11378.js86400.0 s92.9 KiB
fonts.iu.edu/fonts/georgia-pro.woff0.0 ms35.0 KiB
assets.iu.edu/web/fonts/icon-font.css?2024-03-070.0 ms25.5 KiB
/style.css?family=BentonSans:regular,bold|BentonSansCond:...0.0 ms17.1 KiB
bloomington.iu.edu/images/home/bl_fy26_jaiden_medina_cm_705.jpg0.0 ms17.1 KiB
bloomington.iu.edu/_assets/css/site.css?202201280.0 ms16.8 KiB
bloomington.iu.edu/_assets/css/home-2025-october.css0.0 ms16.7 KiB
assets.iu.edu/web/1.5/libs/modernizr.min.js0.0 ms12.0 KiB
assets.iu.edu/search/3.3.x/search.min.css?2022-06-020.0 ms9.7 KiB
pixel.byspotify.com/ping.min.js3600.0 s10.3 KiB
assets.iu.edu/brand/3.3.x/brand.min.css?2023-07-130.0 ms8.1 KiB
collector-45862.tvsquared.com/tv2track.js600.0 s8.7 KiB
assets.iu.edu/search/3.3.x/search.min.js0.0 ms7.2 KiB
bloomington.iu.edu/_assets/js/site.js0.0 ms6.5 KiB
assets.iu.edu/brand/3.3.x/iu-sig-formal.svg0.0 ms6.2 KiB
js.ipredictive.com/viant_universal_pixel.js0.0 ms3.5 KiB
cse.google.com/cse/cse.js?cx=841fb0aa6a8eb43380.0 ms3.1 KiB
assets.iu.edu/brand/3.3.x/trident-large.png0.0 ms1.2 KiB
assets.iu.edu/search/3.x/search.png0.0 ms1.1 KiB
www.google.com/cse/static/style/look/v6/default.css3000.0 s1.2 KiB
process.indiana.edu/ping1786.0 s968 B
explore.indiana.edu/ping1787.0 s967 B
exdd-resources.webapps.iu.edu/js/rave/rave.js0.0 ms653 B
/config/edu/e6d07076-4be1-4b7d-bc78-432a8623c95a.js?v=3.5...0.0 ms446 B
/tv2track.php?action_name=Indiana%20University%20Blooming...0.0 ms276 B
/tr/?id=661123017718972&ev=PageView&dl=https%3A%2F%2Fbloo...0.0 ms19 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.

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
Students stand by the large, limestone Sample Gates on the Indiana University B… div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/samplegates.jpg288.0 KiB249.0 KiB
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26841_20251112_reputati...270.0 KiB226.0 KiB
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26664_20251105_reputati...195.5 KiB151.4 KiB
An Indiana University student in a lab uses a magnifying glass to work with sma… div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/academics.jpg171.0 KiB131.9 KiB
An Indiana University student uses a microscope while a professor looks on. div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/opportunity.jpg152.4 KiB113.4 KiB
Students gathered around a fire pit in front of the IMU building. div.rvt-container-md > div.rvt-hero__inner > div.rvt-hero__media > img
bloomington.iu.edu/images/home/hero/hero_home_fire.png123.0 KiB79.0 KiB
body#home > div#banner > div.show-for-small-only > div.bg-image-cover body#home > div#banner > div.show-for-small-only > div.bg-image-cover
bloomington.iu.edu/images/home/banner/iu-day-512x768.jpg117.3 KiB53.3 KiB
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26873_ksbkdkocstudentdi...66.7 KiB39.6 KiB
div.rvt-c-breakout-quote > div.rvt-quote > div.rvt-avatar > img.rvt-avatar__image div.rvt-c-breakout-quote > div.rvt-quote > div.rvt-avatar > img.rvt-avatar__image
bloomington.iu.edu/images/home/bl_fy26_jaiden_medina_cm_705.jpg16.8 KiB12.2 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-6-DIV
nodeLabel: body#home > div#banner > div.show-for-small-only > div.bg-image-cover
path: 1,HTML,1,BODY,3,DIV,0,DIV,0,DIV
selector: body#home > div#banner > div.show-for-small-only > div.bg-image-cover
snippet: <div class="bg-image-cover" style="background-image: url('/images/home/banner/iu-day-512x768.jpg');">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
bloomington.iu.edu/http/1.1
bloomington.iu.edu/_assets/css/site.css?20220128http/1.1
bloomington.iu.edu/_assets/css/home-2025-october.csshttp/1.1
bloomington.iu.edu/images/home/hero/hero_home_fire.pnghttp/1.1
bloomington.iu.edu/images/home/bl_fy26_jaiden_medina_cm_705.jpghttp/1.1
bloomington.iu.edu/images/academics.jpghttp/1.1
bloomington.iu.edu/images/samplegates.jpghttp/1.1
bloomington.iu.edu/images/opportunity.jpghttp/1.1
/images/home/hoosiers-making-mark/26841_20251112_reputati...http/1.1
/images/home/hoosiers-making-mark/26873_ksbkdkocstudentdi...http/1.1
/images/home/hoosiers-making-mark/26664_20251105_reputati...http/1.1
bloomington.iu.edu/_assets/js/site.jshttp/1.1
bloomington.iu.edu/images/home/banner/iu-day-512x768.jpghttp/1.1

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
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
value: No additional origins are good candidates for preconnecting

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
assets.iu.edu/web/3.3.x/css/iu-framework.min.css?2024-09-05169.2 KiB1.4 s
assets.iu.edu/web/1.5/libs/modernizr.min.js12.0 KiB
assets.iu.edu/web/fonts/icon-font.css?2024-03-0725.5 KiB1.1 s
assets.iu.edu/search/3.3.x/search.min.css?2022-06-029.7 KiB
assets.iu.edu/brand/3.3.x/brand.min.css?2023-07-138.1 KiB151 ms
/style.css?family=BentonSans:regular,bold|BentonSansCond:...17.1 KiB1.1 s
bloomington.iu.edu/_assets/css/home-2025-october.css16.7 KiB1.0 s
bloomington.iu.edu/_assets/css/site.css?2022012816.8 KiB515 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: 1.0 s
URLTime Spent
indiana.edu/1.0 s
bloomington.iu.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

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: 100 ms 6.2 KiB
URLTransfer SizeEst Savings
bloomington.iu.edu/_assets/css/home-2025-october.css16.7 KiB3.4 KiB
www.google.com/cse/static/element/b33cba5881f68fbf/default_v6+nl.css9.7 KiB2.8 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: 1.1 s 230.6 KiB
URLTransfer SizeEst Savings
assets.iu.edu/web/3.3.x/css/iu-framework.min.css?2024-09-05168.5 KiB158.6 KiB
assets.iu.edu/web/fonts/icon-font.css?2024-03-0725.0 KiB23.8 KiB
/style.css?family=BentonSans:regular,bold|BentonSansCond:...16.6 KiB16.6 KiB
bloomington.iu.edu/_assets/css/site.css?2022012816.5 KiB16.2 KiB
bloomington.iu.edu/_assets/css/home-2025-october.css16.4 KiB15.5 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: 1.9 s 761.9 KiB
URLTransfer SizeEst Savings
siteimproveanalytics.com/js/siteanalyze_11378.js92.2 KiB87.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-NFLPFVV&gtm=4e64h1158.0 KiB75.9 KiB
siteimproveanalytics.com/js/siteanalyze_11378.js92.2 KiB70.7 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js117.1 KiB63.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-WJFT899123.2 KiB62.6 KiB
www.googletagmanager.com/gtag/destination?id=DC-10346257&cx=c&gtm=4e64h1129.4 KiB62.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-NF6HQX&gtm=4e64h1173.1 KiB60.5 KiB
www.googletagmanager.com/gtag/js?id=G-61CH0D2DQW&cx=c&gtm=4e64h1174.0 KiB57.8 KiB
www.googletagmanager.com/gtag/destination?id=AW-10820908431&cx=c&gtm=4e64h1146.6 KiB57.1 KiB
assets.iu.edu/web/3.3.x/js/iu-framework.min.js83.4 KiB51.4 KiB
/cse/static/element/b33cba5881f68fbf/cse_element__nl.js?u...98.6 KiB48.4 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB31.7 KiB
cse.google.com/adsense/search/async-ads.js43.3 KiB31.5 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
Unattributable1.4 s365 ms0.0 ms
bloomington.iu.edu/840 ms11 ms3.0 ms
www.googletagmanager.com/gtm.js?id=GTM-WJFT899752 ms642 ms79 ms
www.googletagmanager.com/gtm.js?id=GTM-NFLPFVV&gtm=4e64h1536 ms436 ms91 ms
www.googletagmanager.com/gtm.js?id=GTM-NF6HQX&gtm=4e64h1514 ms399 ms106 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js478 ms385 ms87 ms
www.googletagmanager.com/gtag/destination?id=DC-10346257&cx=c&gtm=4e64h1454 ms369 ms79 ms
siteimproveanalytics.com/js/siteanalyze_11378.js443 ms174 ms247 ms
www.googletagmanager.com/gtag/destination?id=AW-10820908431&cx=c&gtm=4e64h1420 ms345 ms72 ms
www.googletagmanager.com/gtag/js?id=G-61CH0D2DQW&cx=c&gtm=4e64h1398 ms300 ms94 ms
connect.facebook.net/en_US/fbevents.js341 ms256 ms75 ms
sc-static.net/scevent.min.js313 ms258 ms9.5 ms
/signals/config/661123017718972?v=2.9.303&r=stable&domain...278 ms240 ms36 ms
code.jquery.com/jquery-3.5.1.min.js235 ms200 ms22 ms
www.google.com/cse/cse.js?cx=841fb0aa6a8eb4338153 ms149 ms2.1 ms
/cse/static/element/b33cba5881f68fbf/cse_element__nl.js?u...142 ms45 ms59 ms
/config/edu/e6d07076-4be1-4b7d-bc78-432a8623c95a.js?v=3.5...129 ms49 ms3.7 ms
pixel.byspotify.com/ping.min.js122 ms79 ms35 ms
analytics.tiktok.com/i18n/pixel/static/identify_5cff1caf.js83 ms57 ms25 ms
ep2.adtrafficquality.google/sodar/sodar2.js66 ms54 ms3.8 ms
cse.google.com/adsense/search/async-ads.js66 ms39 ms21 ms
www.youtube.com/s/player/1bb6ee63/www-widgetapi.vflset/www-widgetapi.js55 ms49 ms5.0 ms
assets.iu.edu/web/3.3.x/js/iu-framework.min.js54 ms30 ms23 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 Evaluation5.1 s
Script Parsing & Compilation1.2 s
Other1.2 s
Style & Layout575 ms
Garbage Collection229 ms
Parse HTML & CSS140 ms
Rendering106 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
bloomington.iu.edu/images/samplegates.jpg288.3 KiB
/images/home/hoosiers-making-mark/26841_20251112_reputati...270.3 KiB
/images/home/hoosiers-making-mark/26664_20251105_reputati...195.7 KiB
www.googletagmanager.com/gtag/js?id=G-61CH0D2DQW&cx=c&gtm=4e64h1174.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-NF6HQX&gtm=4e64h1173.1 KiB
bloomington.iu.edu/images/academics.jpg171.2 KiB
assets.iu.edu/web/3.3.x/css/iu-framework.min.css?2024-09-05169.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-NFLPFVV&gtm=4e64h1158.1 KiB
bloomington.iu.edu/images/opportunity.jpg152.7 KiB
www.googletagmanager.com/gtag/destination?id=AW-10820908431&cx=c&gtm=4e64h1146.6 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
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26841_20251112_reputati...
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26664_20251105_reputati...
An Indiana University student in a lab uses a magnifying glass to work with sma… div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/academics.jpg
Students stand by the large, limestone Sample Gates on the Indiana University B… div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/samplegates.jpg
An Indiana University student uses a microscope while a professor looks on. div.rvt-container-md > div.rvt-billboard > div.rvt-billboard__image > img
bloomington.iu.edu/images/opportunity.jpg
div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img div.rvt-cols-4-md > div.rvt-card > div.rvt-card__image > img
/images/home/hoosiers-making-mark/26873_ksbkdkocstudentdi...
div.rvt-c-breakout-quote > div.rvt-quote > div.rvt-avatar > img.rvt-avatar__image div.rvt-c-breakout-quote > div.rvt-quote > div.rvt-avatar > img.rvt-avatar__image
bloomington.iu.edu/images/home/bl_fy26_jaiden_medina_cm_705.jpg
Indiana University div.row > p.signature > a.signature-link > img
assets.iu.edu/brand/3.3.x/iu-sig-formal.svg

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

●Layout shift culprits
●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●Optimize viewport for mobile
●Minify JavaScript
●User Timing marks and measures 13 user timings
●Avoid long main-thread tasks 20 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 160 ms
●Server Backend Latencies 220 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 130 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○Avoid non-composited animations
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
●`[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
●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
○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
○`<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.
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
www.googletagmanager.com/gtag/destination?id=AW-10820908431&cx=c&gtm=4e64h1 line 592, col 244
●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 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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