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

Audit breakdown by category with detailed findings.

31

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.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js0.0 ms5.2 MiB
www.eurekalert.org/build/app.73156b0e.js0.0 ms413.8 KiB
www.eurekalert.org/build/app.5767a7ce.css0.0 ms203.0 KiB
www.eurekalert.org/build/0.2d5a26c8.js0.0 ms146.0 KiB
www.eurekalert.org/build/1.fe6350c6.js0.0 ms91.8 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer-ui.css0.0 ms82.7 KiB
assets.adobedtm.com/a48c09ba9d50/1e36ca10b673/launch-ea90f2ac46ad.min.js3600.0 s98.1 KiB
www.eurekalert.org/images/uploads/square-logo-webp-61e9ce6638ed0279651159.webp0.0 ms70.5 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s73.1 KiB
/images/uploads/spj24-eurekalert-banner300x250-1-6810f105...0.0 ms49.9 KiB
/images/uploads/acs-18148-2026-spring-meeting-eureka-aler...0.0 ms40.3 KiB
www.eurekalert.org/images/uploads/300x250-66ec251bf0e1e972115578.webp0.0 ms37.6 KiB
/signals/config/2654080238088440?v=2.9.303&r=stable&domai...1200.0 s33.1 KiB
www.eurekalert.org/build/fonts/glyphicons-halflings-regular.e3cab037.woff0.0 ms23.1 KiB
www.eurekalert.org/images/bg.header.webp0.0 ms20.5 KiB
www.eurekalert.org/images/uploads/climate_change_square_202412.webp0.0 ms14.3 KiB
www.eurekalert.org/images/uploads/marine_science_square_202412.webp0.0 ms14.2 KiB
/images/uploads/acs-chemistry-for-life-2color-rbg-logo-65...0.0 ms13.6 KiB
www.eurekalert.org/images/uploads/wpi-stacked-6597042621f41381516210.webp0.0 ms11.8 KiB
www.eurekalert.org/images/uploads/cancer_research_square_202412.webp0.0 ms11.6 KiB
www.eurekalert.org/images/logo-2x.png0.0 ms11.1 KiB
/images/uploads/features-and-articles-portal-6555178dbd3a...0.0 ms10.4 KiB
/images/uploads/parkinson-s-awareness-1-69cd11e5ad50d4264...0.0 ms7.9 KiB
/images/uploads/nutrition-logo-square-69c2e13756cfb058065...0.0 ms7.3 KiB
www.eurekalert.org/images/brand.png0.0 ms7.3 KiB
www.eurekalert.org/images/uploads/nsf-homepage-6167beda9b896028132993.webp0.0 ms5.8 KiB
www.eurekalert.org/images/uploads/doe-616706ce1dcf5908761926.webp0.0 ms4.4 KiB
/images/uploads/nih-master-logo-mark-2color-61659fb9b6ba7...0.0 ms3.1 KiB
www.eurekalert.org/images/logo-footer.png0.0 ms3.0 KiB
www.eurekalert.org/build/runtime.7576e7bf.js0.0 ms1.7 KiB
pagead2.googlesyndication.com/pagead/js/r20260420/r20110914/abg_lite_fy2021.js1209600.0 s8.4 KiB
/a48c09ba9d50/1e36ca10b673/3fdd7eac0600/RC7cda37fed2cb4b9...3600.0 s864 B
www.eurekalert.org/images/bg.gradient.png0.0 ms484 B
/pagead/js/r20260420/r20110914/client/window_focus_fy2021.js1209600.0 s1.2 KiB
/tr/?id=2654080238088440&ev=PageView&dl=https%3A%2F%2Fwww...0.0 ms19 B
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s0 B
pagead2.googlesyndication.com/pagead/js/r20260420/r20110914/abg_lite_fy2021.js1209600.0 s0 B
/pagead/js/r20260420/r20110914/client/window_focus_fy2021.js1209600.0 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
www.eurekalert.org/build/fonts/glyphicons-halflings-regular.e3cab037.woff265 ms
/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.070 ms
/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu...35 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.

URLResource SizeEst Savings
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/a32454cd-fe90-4d40-b851-03b8f55a9083/R...105.5 KiB104.9 KiB
IMAGE div.col-sm-5 > article.trending > a > img
/Api/v1/Multimedia/46657ab8-4a30-43ad-812e-4537e0018693/R...105.7 KiB99.3 KiB
body.jar > div#google_image_div > a#aw0 > img.img_ad body.jar > div#google_image_div > a#aw0 > img.img_ad
tpc.googlesyndication.com/simgad/430173354222035660295.6 KiB83.4 KiB
IMAGE div.col-sm-5 > article.trending > a > img
/Api/v1/Multimedia/135edc95-2c3a-47ab-9b16-f1cb36df8de6/R...83.2 KiB76.4 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/square-logo-webp-61e9ce6638ed0279651159.webp70.1 KiB66.2 KiB
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/eb21929e-e749-4f51-8eab-3e05ae971012/R...63.3 KiB62.8 KiB
IMAGE div.col-sm-7 > article.trending > a > img
/Api/v1/Multimedia/0febe447-a559-473e-83bf-ba6e356d7df5/R...69.7 KiB46.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/spj24-eurekalert-banner300x250-1-6810f105...49.6 KiB45.6 KiB
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/8b6edfc0-af40-4846-8ad4-565cde214be5/R...43.9 KiB43.4 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/acs-18148-2026-spring-meeting-eureka-aler...40.0 KiB36.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/300x250-66ec251bf0e1e972115578.webp37.3 KiB33.3 KiB
body.jar > div#google_image_div > a#aw0 > img.img_ad body.jar > div#google_image_div > a#aw0 > img.img_ad
tpc.googlesyndication.com/simgad/20370494319803173825.4 KiB13.2 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/climate_change_square_202412.webp14.0 KiB10.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/marine_science_square_202412.webp13.9 KiB10.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/wpi-stacked-6597042621f41381516210.webp11.5 KiB9.7 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/acs-chemistry-for-life-2color-rbg-logo-65...13.4 KiB9.4 KiB
EurekAlert! Science News div.clearfix > div.col-md-6 > a.logo > img
www.eurekalert.org/images/logo-2x.png10.8 KiB8.1 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/cancer_research_square_202412.webp11.3 KiB7.6 KiB
A service of the American Association for the Advancement of Science div.clearfix > div.col-md-6 > a.brand > img
www.eurekalert.org/images/brand.png7.0 KiB6.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/parkinson-s-awareness-1-69cd11e5ad50d4264...7.6 KiB5.1 KiB
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
www.eurekalert.org/images/uploads/nsf-homepage-6167beda9b896028132993.webp5.5 KiB5.0 KiB
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/nutrition-logo-square-69c2e13756cfb058065...7.0 KiB4.7 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:1263.747 label:Time to first byte subpart:timeToFirstByte] map[duration:2439.653 label:Resource load delay subpart:resourceLoadDelay] map[duration:330.266 label:Resource load duration subpart:resourceLoadDuration] map[duration:185.015 label:Element render delay subpart:elementRenderDelay]]
lhId: page-20-DIV
nodeLabel: ADVANCED SEARCH
path: 5,HTML,2,BODY,0,DIV,0,HEADER,0,DIV
selector: body > div#wrapper > header#navigation > div.navbar
snippet: <div class="navbar navbar-static-top">

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-20-DIV
nodeLabel: ADVANCED SEARCH
path: 5,HTML,2,BODY,0,DIV,0,HEADER,0,DIV
selector: body > div#wrapper > header#navigation > div.navbar
snippet: <div class="navbar navbar-static-top">

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
/Api/v1/Multimedia/135edc95-2c3a-47ab-9b16-f1cb36df8de6/R...http/1.1
/Api/v1/Multimedia/46657ab8-4a30-43ad-812e-4537e0018693/R...http/1.1
/Api/v1/Multimedia/0febe447-a559-473e-83bf-ba6e356d7df5/R...http/1.1
/Api/v1/Multimedia/eb21929e-e749-4f51-8eab-3e05ae971012/R...http/1.1
/Api/v1/Multimedia/8b6edfc0-af40-4846-8ad4-565cde214be5/R...http/1.1
/Api/v1/Multimedia/a32454cd-fe90-4d40-b851-03b8f55a9083/R...http/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
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js5.2 MiB4.2 s
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer-ui.css82.7 KiB208 ms
www.eurekalert.org/build/app.5767a7ce.css203.0 KiB625 ms
/css?family=Open+Sans:300italic,400italic,600italic,700it...2.8 KiB274 ms
ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css8.5 KiB266 ms
maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css7.4 KiB271 ms

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: 687 ms
URLTime Spent
eurekalert.org/687 ms
www.eurekalert.org/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

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: 840 ms 266.0 KiB
URLTransfer SizeEst Savings
www.eurekalert.org/build/app.5767a7ce.css202.5 KiB183.6 KiB
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer-ui.css82.4 KiB82.4 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 3.2 s 4.7 MiB
URLTransfer SizeEst Savings
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js5.2 MiB3.7 MiB
www.eurekalert.org/build/app.73156b0e.js412.3 KiB358.7 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB103.3 KiB
www.googletagmanager.com/gtag/js?id=G-KQG7WRFJWG&cx=c&gtm=4e64h1172.0 KiB68.2 KiB
www.eurekalert.org/build/0.2d5a26c8.js145.5 KiB67.8 KiB
www.eurekalert.org/build/1.fe6350c6.js91.4 KiB62.5 KiB
www.googletagmanager.com/gtag/js?id=AW-823154227&cx=c&gtm=4e64h1144.6 KiB62.4 KiB
www.googletagmanager.com/gtag/js?id=AW-975347983&cx=c&gtm=4e64h1137.7 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-1070246774&l=dataLayer137.6 KiB57.8 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB35.1 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.7 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.7 KiB
assets.adobedtm.com/a48c09ba9d50/1e36ca10b673/launch-ea90f2ac46ad.min.js97.8 KiB30.3 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
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js575 ms439 ms134 ms
/pagead/managed/js/gpt/m202604160201/pubads_impl.js418 ms375 ms18 ms
www.eurekalert.org/189 ms42 ms7.5 ms
Unattributable155 ms6.6 ms0.0 ms
/pagead/managed/js/activeview/current/ufs_web_display.js107 ms92 ms11 ms
assets.adobedtm.com/a48c09ba9d50/1e36ca10b673/launch-ea90f2ac46ad.min.js84 ms67 ms9.7 ms
www.googletagmanager.com/gtag/js?id=AW-1070246774&l=dataLayer77 ms68 ms9.0 ms
www.googletagmanager.com/gtag/js?id=G-KQG7WRFJWG&cx=c&gtm=4e64h173 ms62 ms11 ms
www.eurekalert.org/build/app.73156b0e.js71 ms48 ms19 ms
www.googletagmanager.com/gtag/js?id=AW-823154227&cx=c&gtm=4e64h167 ms46 ms8.6 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 Evaluation1.4 s
Script Parsing & Compilation263 ms
Other181 ms
Style & Layout97 ms
Garbage Collection33 ms
Parse HTML & CSS27 ms
Rendering24 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.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js5.2 MiB
www.eurekalert.org/build/app.73156b0e.js413.8 KiB
www.eurekalert.org/build/app.5767a7ce.css203.0 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB
www.googletagmanager.com/gtag/js?id=G-KQG7WRFJWG&cx=c&gtm=4e64h1172.0 KiB
www.eurekalert.org/build/0.2d5a26c8.js146.0 KiB
www.googletagmanager.com/gtag/js?id=AW-823154227&cx=c&gtm=4e64h1144.6 KiB
www.googletagmanager.com/gtag/js?id=AW-1070246774&l=dataLayer138.0 KiB
www.googletagmanager.com/gtag/js?id=AW-975347983&cx=c&gtm=4e64h1137.8 KiB
/Api/v1/Multimedia/46657ab8-4a30-43ad-812e-4537e0018693/R...106.4 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
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/square-logo-webp-61e9ce6638ed0279651159.webp
IMAGE div.col-sm-7 > article.trending > a > img
/Api/v1/Multimedia/0febe447-a559-473e-83bf-ba6e356d7df5/R...
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/eb21929e-e749-4f51-8eab-3e05ae971012/R...
IMAGE div.col-sm-5 > article.trending > a > img
/Api/v1/Multimedia/135edc95-2c3a-47ab-9b16-f1cb36df8de6/R...
IMAGE div.col-sm-5 > article.trending > a > img
/Api/v1/Multimedia/46657ab8-4a30-43ad-812e-4537e0018693/R...
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/8b6edfc0-af40-4846-8ad4-565cde214be5/R...
IMAGE article.trending > a > div.thumb > img
/Api/v1/Multimedia/a32454cd-fe90-4d40-b851-03b8f55a9083/R...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/wpi-stacked-6597042621f41381516210.webp
EurekAlert! Science News div.clearfix > div.col-md-6 > a.logo > img
www.eurekalert.org/images/logo-2x.png
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/acs-18148-2026-spring-meeting-eureka-aler...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/nutrition-logo-square-69c2e13756cfb058065...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/acs-chemistry-for-life-2color-rbg-logo-65...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/300x250-66ec251bf0e1e972115578.webp
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/spj24-eurekalert-banner300x250-1-6810f105...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
/images/uploads/parkinson-s-awareness-1-69cd11e5ad50d4264...
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/cancer_research_square_202412.webp
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/marine_science_square_202412.webp
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
www.eurekalert.org/images/uploads/climate_change_square_202412.webp
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
/images/uploads/nih-master-logo-mark-2color-61659fb9b6ba7...
A service of the American Association for the Advancement of Science div.clearfix > div.col-md-6 > a.brand > img
www.eurekalert.org/images/brand.png
AAAS - American Association for the Advancement of Science div.row > div.col-sm-5 > p.brand > img
www.eurekalert.org/images/brand.png
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
www.eurekalert.org/images/uploads/doe-616706ce1dcf5908761926.webp
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
www.eurekalert.org/images/uploads/nsf-homepage-6167beda9b896028132993.webp
EurekAlert! The Global Source for Science News div.row > div.col-sm-5 > p.logo > img
www.eurekalert.org/images/logo-footer.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
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 9 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 170 ms
●Server Backend Latencies 490 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 270 ms
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
○Avoid non-composited animations
83

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
form#simplesearch > div.input-group > span.input-group-btn > button#search-btn form#simplesearch > div.input-group > span.input-group-btn > button#search-btn

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.widget > a > div.image-box > img div.widget > a > div.image-box > img

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.card-body > div.row > div.col-xs-3 > a.list-group-item div.card-body > div.row > div.col-xs-3 > a.list-group-item
div.card > div.row > div.col-xs-3 > a.list-group-item div.card > div.row > div.col-xs-3 > a.list-group-item
div#accordionExample > div.row > div.col-xs-3 > a.list-group-item div#accordionExample > div.row > div.col-xs-3 > a.list-group-item
div.row > aside#sidebar-content > div.widget > a div.row > aside#sidebar-content > div.widget > a

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.

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
VLAAMS INSTITUUT VOOR BIOTECHNOLOGIE article.trending > a > header > p.meta_institute
UNIVERSITY OF TORONTO article.trending > a > header > p.meta_institute
UNIVERSITY OF FLORIDA article.trending > a > header > p.meta_institute
UNIVERSITY OF MALTA article.trending > a > header > p.meta_institute
EDITORIAL OFFICE OF WEST CHINA SCHOOL OF STOMATOLOGY, SICHUAN UNIVERSITY article.trending > a > header > p.meta_institute
NYU LANGONE HEALTH / NYU GROSSMAN SCHOOL OF MEDICINE article.trending > a > header > p.meta_institute
UCI HEALTH article.trending > a > header > p.meta_institute
WASHINGTON STATE UNIVERSITY article.trending > a > header > p.meta_institute
UNIVERSITÉ DE GENÈVE article.trending > a > header > p.meta_institute
View More News  div#main-content > div.row > div.col-sm-7 > a.view-all
NUTRITION 2026 a > div.microsite-card__inner > div.microsite-card__body > div.microsite-card__title
Tsinghua University Press a > div.microsite-card__inner > div.microsite-card__body > div.microsite-card__title
#EurekAlertStaffPicks newsletter section.widget > div.thumbnail > div.caption > a

These are opportunities to improve the legibility of your content.

○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
●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.
●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
●`<frame>` or `<iframe>` elements have a title
●`<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
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[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
○`<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
○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.
○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.
81

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
AttributionReporting
connect.facebook.net/en_US/fbevents.js line 279, col 769

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.

URL
www.eurekalert.org/build/@mediakind/mkplayer/mkplayer.js
●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
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Mitigate clickjacking with XFO or CSP
82

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.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
a > div.microsite-card__inner > div.microsite-card__image > img a > div.microsite-card__inner > div.microsite-card__image > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.row > div.col-xs-3 > a.list-group-item > img div.row > div.col-xs-3 > a.list-group-item > img
div.widget > a > div.image-box > img div.widget > a > div.image-box > img

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 have descriptive text
●Links are crawlable
●Document has a valid `hreflang`
○robots.txt is valid
○Document has a valid `rel=canonical`

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