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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.

68

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
registry.api.cnn.io/bundles/fave/ui-34be6e59/ui600.0 s2.3 MiB
media.cnn.com/api/v1/loops/stellar/prod/brs-arrest.mp4?c=original300.0 s2.0 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...300.0 s1.1 MiB
media.cnn.com/api/v1/loops/stellar/prod/hp-loop-2-4.mp4?c=original300.0 s778.9 KiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...300.0 s612.9 KiB
registry.api.cnn.io/bundles/fave/boltPlayer-b296f72a/boltPlayer600.0 s617.9 KiB
registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor600.0 s340.4 KiB
/api/v1/images/stellar/prod/2024-06-07t155014z-2130927673...300.0 s217.3 KiB
/media/sites/js/bundles/cnn-edition-adfuel-275d6f33a8b3e5...7200.0 s216.1 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js600.0 s122.4 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js600.0 s116.4 KiB
/api/v1/images/stellar/prod/2024-06-07t155014z-2130927673...300.0 s106.3 KiB
cdn.tinypass.com/api/tinypass.min.js14400.0 s131.9 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js7200.0 s110.5 KiB
/api/v1/images/stellar/prod/128-9-jaggers-3g5fny.jpg?c=16...300.0 s85.5 KiB
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js0.0 ms74.3 KiB
/api/v1/images/stellar/prod/2016-11-01t120000z-1900993534...300.0 s74.0 KiB
registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance600.0 s75.1 KiB
/api/v1/images/stellar/prod/gettyimages-2242854081.jpg?c=...300.0 s61.2 KiB
/api/v1/images/stellar/prod/c-gettyimages-2269112472.jpg?...300.0 s58.2 KiB
/api/v1/images/stellar/prod/gettyimages-2270091565.jpg?c=...300.0 s51.9 KiB
lightning.cnn.com/analytics/comscore/comscore-JS-7.13.1.min.js600.0 s51.3 KiB
/api/v1/images/stellar/prod/gettyimages-2269628580.jpg?c=...300.0 s48.8 KiB
ix.cnn.io/static/fonts/latest/cnnsans-regular.woff20.0 ms45.9 KiB
/api/v1/images/stellar/prod/805515156004.jpg?c=16x9&q=h_4...300.0 s39.5 KiB
/api/v1/images/stellar/prod/gettyimages-2261797182.jpg?c=...300.0 s38.5 KiB
/api/v1/images/stellar/prod/gettyimages-2210134696.jpg?c=...300.0 s37.8 KiB
ix.cnn.io/static/fonts/latest/cnnsans-bold.woff20.0 ms34.9 KiB
/api/v1/images/stellar/prod/118618-trumpartemisiicall-vrt...300.0 s34.7 KiB
/api/v1/images/stellar/prod/2016-11-01t120000z-1900993534...300.0 s34.6 KiB
/media/sites/js/bundles/cnn-edition-adfuel-body-1fce5e168...7200.0 s43.8 KiB
registry.api.cnn.io/bundles/fave/4.32.0/css600.0 s34.4 KiB
/api/v1/images/stellar/prod/260325-ma-health-doctorsimmig...300.0 s31.8 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
/api/v1/images/stellar/prod/gettyimages-2160726847.jpg?c=...300.0 s31.6 KiB
/api/v1/images/stellar/prod/gettyimages-2270091565.jpg?c=...300.0 s29.7 KiB
/api/v1/images/stellar/prod/2026-04-07t170647z-1632762567...300.0 s28.7 KiB
/api/v1/images/stellar/prod/01-01-260401-cvh-politics-lou...300.0 s25.7 KiB
/api/v1/images/stellar/prod/moon-artemis-ii-crew-vrtc-cln...300.0 s25.1 KiB
edition.cnn.com/media/sites/cnn/app-store-cnn-app-qr-code.png60.0 s22.9 KiB
edition.cnn.com/media/sites/cnn/google-play-cnn-app-qr-code.png60.0 s22.3 KiB
/api/v1/images/stellar/prod/michigan-1.jpg?c=9x16&q=h_480...300.0 s22.5 KiB
/api/v1/images/stellar/prod/ap26096721617728.jpg?c=2x3&q=...300.0 s22.4 KiB
/api/v1/images/stellar/prod/118601-cyberdecks-vrtc-thumb-...300.0 s20.4 KiB
/api/v1/images/stellar/prod/260406-ronanfarrow-00-00-00-0...300.0 s19.4 KiB
/api/v1/images/stellar/prod/c-gettyimages-2268530617.jpg?...300.0 s19.3 KiB
/api/v1/images/stellar/prod/118632-clean-uskhargislandstr...300.0 s18.9 KiB
/api/v1/images/stellar/prod/artemis-20260406213930752.jpg...300.0 s18.5 KiB
/api/v1/images/stellar/prod/still-22506874-3875405-705-st...300.0 s18.3 KiB
/api/v1/images/stellar/prod/still-22519336-114773-951-sti...300.0 s17.4 KiB
/api/v1/images/stellar/prod/gettyimages-2177651050.jpg?c=...300.0 s16.5 KiB
/api/v1/images/stellar/prod/118613-wattlesfarsidemoon-ver...300.0 s16.4 KiB
/api/v1/images/stellar/prod/joeboystage.jpg?c=16x9&q=h_43...300.0 s16.3 KiB
/api/v1/images/stellar/prod/thumbnail-istanbul-shooting-2...300.0 s16.1 KiB
/api/v1/images/stellar/prod/118630-ripley-kjucomplimentss...300.0 s15.6 KiB
/api/v1/images/stellar/prod/renamethisvertical-3-00-00-06...300.0 s15.4 KiB
/api/v1/images/stellar/prod/gettyimages-2188561056.jpg?c=...300.0 s15.1 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/EX33692741...0.0 ms14.4 KiB
/api/v1/images/stellar/prod/2026-04-06t181041z-1543949436...300.0 s15.0 KiB
/api/v1/images/stellar/prod/118638-clean-kanyebannedfromu...300.0 s14.7 KiB
/api/v1/images/stellar/prod/118635-iranpowergrid-thumbnai...300.0 s14.5 KiB
/api/v1/images/stellar/prod/118619-jakartaairportceiling-...300.0 s14.4 KiB
/api/v1/images/stellar/prod/2026-04-07t035643z-2004354436...300.0 s14.2 KiB
/api/v1/images/stellar/prod/trumpcivilization-thumb-clean...300.0 s14.2 KiB
/api/v1/images/stellar/prod/118614-holmestrumphormuzthumb...300.0 s14.1 KiB
/api/v1/images/stellar/prod/hftx7poxcaaks3g.jpg?c=16x9&q=...300.0 s14.0 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js7200.0 s17.6 KiB
/api/v1/images/stellar/prod/gettyimages-2252796046.jpg?c=...300.0 s13.4 KiB
tpc.googlesyndication.com/sodar/xdEizrWJ.js3000.0 s15.4 KiB
/api/v1/images/stellar/prod/gettyimages-2178325356-202603...300.0 s13.1 KiB
/api/v1/images/stellar/prod/118630-ripley-kjucomplimentss...300.0 s12.8 KiB
/api/v1/images/stellar/prod/118617-offsetshotflorida-vert...300.0 s12.5 KiB
/api/v1/images/stellar/prod/118641-vancephonestrump-thumb...300.0 s12.4 KiB
/api/v1/images/stellar/prod/gettyimages-2266699831.jpg?c=...300.0 s12.2 KiB
/api/v1/images/stellar/prod/pg-38-and-39-for-cnn.jpg?c=16...300.0 s12.1 KiB
/api/v1/images/stellar/prod/118624-beckyaid-vertical-clea...300.0 s11.9 KiB
/api/v1/images/stellar/prod/thumbnail-iran-police-fire-at...300.0 s11.9 KiB
/api/v1/images/stellar/prod/118623-australiasoldierwarcri...300.0 s11.8 KiB
/api/v1/images/stellar/prod/118616-trump-threatens-leak-0...300.0 s11.3 KiB
/api/v1/images/stellar/prod/trumpcarlson.jpg?c=2x3&q=h_38...300.0 s10.9 KiB
/api/v1/images/stellar/prod/01-the-dinosaurs-n-s1-e2-00-0...300.0 s10.6 KiB
/api/v1/images/stellar/prod/118629-nutellaspace-vrtc-thum...300.0 s10.6 KiB
/api/v1/images/stellar/prod/118603-stevehilton-js-clean-0...300.0 s10.0 KiB
/api/v1/images/stellar/prod/vance-orban-thumb.jpg?c=9x16&...300.0 s9.5 KiB
/api/v1/images/stellar/prod/lynette-hooker-1.jpg?c=2x3&q=...300.0 s9.1 KiB
/api/v1/images/stellar/prod/240110-wnl-politics-iowarepub...300.0 s9.0 KiB
/api/v1/images/stellar/prod/mb-saissac1.jpg?c=16x9&q=h_14...300.0 s8.9 KiB
/api/v1/images/stellar/prod/harrisfuller-2026040620300344...300.0 s8.3 KiB
/api/v1/images/stellar/prod/gettyimages-522616372.jpg?c=1...300.0 s8.1 KiB
/dailygraphics/graphics/20260330-artemis-ii-mission-hp/as...0.0 ms7.5 KiB
/api/v1/images/stellar/prod/gettyimages-2268680812a.JPG?c...300.0 s7.4 KiB
cdn.ml314.com/taglw.js3600.0 s8.5 KiB
/api/v1/images/stellar/prod/ap26093061807394.jpg?c=16x9&q...300.0 s7.1 KiB
registry.api.cnn.io/bundles/fave/4.32.0/app600.0 s7.2 KiB
edition.cnn.com/wbdotp/scripttemplates/otSDKStub.js7200.0 s8.8 KiB
/api/v1/images/stellar/prod/2025-05-06t165832z-908256034-...300.0 s6.8 KiB
/api/v1/images/stellar/prod/ap25033832713011.jpg?c=2x3&q=...300.0 s6.8 KiB
/api/v1/images/stellar/prod/ap19110047433985.jpg?c=16x9&q...300.0 s6.7 KiB
/api/v1/images/stellar/prod/screenshot-1-2026040709065028...300.0 s6.4 KiB
cdn.cxense.com/cx.cce.js3600.0 s6.8 KiB
/api/v1/images/stellar/prod/1-michaelgoulding-hires-00223...300.0 s5.2 KiB
/api/v1/images/stellar/videothumbnails/54607399-58388411-...300.0 s5.2 KiB
/api/v1/images/stellar/prod/659586013-1493256312169740-20...300.0 s4.8 KiB
/api/v1/images/stellar/prod/gettyimages-2200966908-202604...300.0 s4.6 KiB
/api/v1/images/stellar/prod/118603-stevehilton-js-clean-0...300.0 s4.6 KiB
rules.quantcount.com/rules-p-D1yc5zQgjmqr5.js3600.0 s4.3 KiB
/dailygraphics/graphics/20260330-artemis-ii-mission-hp/as...0.0 ms3.3 KiB
media.cnn.com/api/v1/images/stellar/prod/artemisii.png?q=w_400,c_fill/f_webp300.0 s3.5 KiB
sb.scorecardresearch.com/internal-cs/default/beacon.js86400.0 s6.7 KiB
cdn.cnn.com/cnn/.e/interactive/js/lib/vendor/pym/pym.v1.min.js3600.0 s3.2 KiB
edition.cnn.com/media/sites/cnn/video-placeholder.svg60.0 s1.7 KiB
edition.cnn.com/media/sites/cnn/icons/photo-dark.svg60.0 s1.6 KiB
edition.cnn.com/media/sites/cnn/icons/audio-icon-header.svg60.0 s1.5 KiB
experience.piano.io/xbuilder/experience/load?aid=RCoM2QBLpu1800.0 s1.7 KiB
edition.cnn.com/media/sites/cnn/icons/video-dark.svg60.0 s1.4 KiB
edition.cnn.com/media/sites/cnn/icons/video.svg60.0 s1.4 KiB
edition.cnn.com/media/sites/cnn/icons/video-icon-header.svg60.0 s1.4 KiB
edition.cnn.com/media/sites/cnn/icons/ui-caret-right-thick.svg60.0 s1.3 KiB
edition.cnn.com/media/sites/cnn/icons/ui-search.svg60.0 s1.3 KiB
edition.cnn.com/media/sites/cnn/icons/ui-caret-left-thick.svg60.0 s1.3 KiB
edition.cnn.com/media/sites/cnn/icons/ui-speech-bubble.svg60.0 s1.2 KiB
edition.cnn.com/media/sites/cnn/icons/gray-caret.svg60.0 s1.2 KiB
edition.cnn.com/media/sites/cnn/icons/live-tv-icon-header.svg60.0 s1.2 KiB
registry.api.cnn.io/bundles/fave/4.32.0/vendorHashes600.0 s526 B
/Repo/rep.gif?ver=3.3.0&typ=pgv&rnd=mnp2cx7iv7cziahf&sid=...0.0 ms412 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
edition.cnn.com/fonts/cnn/cnn_sans_display-bold-v1.woff2100 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-medium-v1.woff265 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-v1.woff260 ms
ix.cnn.io/static/fonts/latest/cnnsans-bold.woff25.0 ms
ix.cnn.io/static/fonts/latest/cnnsans-regular.woff25.0 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:5.817 source:map[column:6455 line:17394 type:source-location url:https://edition.cnn.com/ 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:0.158 source:map[column:2772 line:2 type:source-location url:https://cdn.cnn.com/cnn/.e/interactive/js/lib/vendor/pym/pym.v1.min.js urlProvider:network]] map[reflowTime:1.13 source:map[column:473 line:17393 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:2.282 source:map[column:588 line:17389 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.502 source:map[column:884 line:17390 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.099 source:map[column:1858 line:16714 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.538 source:map[column:865 line:16714 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.326 source:map[column:594 line:16714 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:4.335 source:map[column:1726 line:17393 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.757 source:map[column:244 line:16724 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:3.387 source:map[column:2004 line:17393 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:9.498 source:map[column:12519 line:17400 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.926 source:map[column:315 line:16365 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:6.214 source:map[type:text value:[unattributed]]] map[reflowTime:0.592 source:map[column:96676 line:393 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.314 source:map[column:263677 line:0 type:source-location url:https://registry.api.cnn.io/bundles/fave/latest-4.x/js urlProvider:network]]]

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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

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
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB1.1 MiB
div#player-player-cms.cnn.com/_components/video-player/instances/clnm1qpgd00003b6irfa0z60h@published-pui-wrapper > div.sc-dpmNSJ > div.sc-dpmNSJ > div.sc-dpmNSJ div#player-player-cms.cnn.com/_components/video-player/instances/clnm1qpgd00003b6irfa0z60h@published-pui-wrapper > div.sc-dpmNSJ > div.sc-dpmNSJ > div.sc-dpmNSJ
/api/v1/images/stellar/prod/cnn-headlines-international-p...612.3 KiB527.9 KiB
A man speaks on a mobile phone as he walks across a crowded market in Varanasi,… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2242854081.jpg?c=...60.7 KiB47.8 KiB
BUDAPEST, HUNGARY - APRIL 7: U.S. Vice President JD Vance meets with Hungarian… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2269628580.jpg?c=...48.4 KiB45.8 KiB
Bianca Jagger. Activist, 1 June 1976 (page 128) Mick Jagger. Musician, 1 June 1… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/128-9-jaggers-3g5fny.jpg?c=16...84.9 KiB44.0 KiB
Low water levels are visible at Blue Mesa Reservoir on March 25, near Gunnison,… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/c-gettyimages-2269112472.jpg?...57.6 KiB42.0 KiB
Godfrey Wade div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/805515156004.jpg?c=16x9&q=h_4...38.9 KiB28.0 KiB
This photograph shows fried chicken dishes inside the kitchen of a Krousty Saba… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2261797182.jpg?c=...37.9 KiB27.2 KiB
AUGUSTA, GEORGIA - APRIL 13: Rory McIlroy of Northern Ireland reacts as he puts… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2210134696.jpg?c=...37.3 KiB26.8 KiB
Acting US Attorney General Todd Blanche speaks during a press conference at the… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2026-04-07t170647z-1632762567...28.2 KiB24.1 KiB
Dr. Faysal Al Ghoula is a pulmonary and critical care physician whose path to p… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/260325-ma-health-doctorsimmig...31.3 KiB24.1 KiB
Workers displaced by AI can be negatively impacted for several years, Goldman S… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2160726847.jpg?c=...31.0 KiB22.3 KiB
Virginia State Sen. L. Louise Lucas talks about redistricting at her office in … div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/01-01-260401-cvh-politics-lou...25.2 KiB18.1 KiB
US and Taiwan flags fly outside the National Chung-Shan Institute of Science an… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/c-gettyimages-2268530617.jpg?...18.7 KiB15.8 KiB
Law enforcement work the scene of a reported shooting in Stanislaus County, Cal… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/still-22519336-114773-951-sti...16.8 KiB14.4 KiB
U.S. President Donald Trump, flanked by Secretary of Defense Pete Hegseth, spea… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2026-04-06t181041z-1543949436...14.5 KiB12.2 KiB
Apr 6, 2026; Indianapolis, IN, USA; Michigan Wolverines guard Elliot Cadeau (3)… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/2026-04-07t035643z-2004354436...13.7 KiB7.7 KiB
A spirit bear, or Kermode bear, photographed by Jack Plant in the Great Bear Ra… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/pg-38-and-39-for-cnn.jpg?c=16...11.6 KiB5.6 KiB

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: 203 ms
URLTime Spent
www.cnn.com/203 ms
edition.cnn.com/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 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: 120 ms 1.5 MiB
URLTransfer SizeEst Savings
registry.api.cnn.io/bundles/fave/boltPlayer-b296f72a/boltPlayer617.3 KiB320.6 KiB
registry.api.cnn.io/bundles/fave/ui-34be6e59/ui2.3 MiB259.8 KiB
registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor329.9 KiB228.7 KiB
/media/sites/js/bundles/cnn-edition-adfuel-275d6f33a8b3e5...215.8 KiB160.2 KiB
edition.cnn.com/171.2 KiB113.9 KiB
cdn.tinypass.com/api/tinypass.min.js131.4 KiB82.5 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js110.0 KiB81.1 KiB
accounts.google.com/gsi/client92.7 KiB69.3 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js121.8 KiB69.2 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js115.8 KiB44.3 KiB
lightning.cnn.com/analytics/comscore/comscore-JS-7.13.1.min.js50.9 KiB39.6 KiB
registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance74.6 KiB37.0 KiB
/media/sites/js/bundles/cnn-edition-adfuel-body-1fce5e168...43.2 KiB29.0 KiB
cdn.cxense.com/cx.js37.5 KiB21.7 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
edition.cnn.com/1.7 s205 ms117 ms
Unattributable413 ms12 ms0.0 ms
registry.api.cnn.io/bundles/fave/boltPlayer-b296f72a/boltPlayer342 ms261 ms54 ms
/media/sites/js/bundles/cnn-edition-adfuel-275d6f33a8b3e5...152 ms124 ms28 ms
registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor136 ms76 ms27 ms
registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance122 ms107 ms6.9 ms
registry.api.cnn.io/bundles/fave/ui-34be6e59/ui100 ms23 ms78 ms
cdn.tinypass.com/api/tinypass.min.js86 ms53 ms8.6 ms
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js73 ms43 ms28 ms
registry.api.cnn.io/bundles/fave/latest-4.x/js65 ms44 ms19 ms
/media/sites/js/bundles/cnn-edition-adfuel-body-1fce5e168...64 ms55 ms8.3 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 Evaluation1.1 s
Other857 ms
Style & Layout615 ms
Script Parsing & Compilation415 ms
Rendering306 ms
Parse HTML & CSS124 ms
Garbage Collection7.4 ms

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 137.1 KiB
URLTransfer SizeEst Savings
@font-face { font-family: "cnn_sans_condensed"; font-weight: 700; … } …170.8 KiB137.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
registry.api.cnn.io/bundles/fave/ui-34be6e59/ui2.3 MiB
media.cnn.com/api/v1/loops/stellar/prod/brs-arrest.mp4?c=original2.0 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB
media.cnn.com/api/v1/loops/stellar/prod/hp-loop-2-4.mp4?c=original778.9 KiB
registry.api.cnn.io/bundles/fave/boltPlayer-b296f72a/boltPlayer617.9 KiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...612.9 KiB
edition.cnn.com/503.7 KiB
registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor340.4 KiB
/api/v1/images/stellar/prod/2024-06-07t155014z-2130927673...217.3 KiB
/media/sites/js/bundles/cnn-edition-adfuel-275d6f33a8b3e5...216.1 KiB

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 12 user timings
●Avoid long main-thread tasks 9 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 170 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
93

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.container__field-wrapper > ul.container__field-links > li.card > a.container__link div.container__field-wrapper > ul.container__field-links > li.card > a.container__link
div.container__field-wrapper > ul.container__field-links > li.card > a.container__link div.container__field-wrapper > ul.container__field-links > li.card > a.container__link

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
China li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Europe li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
India li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Facts First li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
CNN Polls li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Tech li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Media li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Pre-markets li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
After-Hours li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Fear & Greed li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Fitness li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Food li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Sleep li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Mindfulness li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Relationships li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Movies li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Television li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Celebrity li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Arts li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Design li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Fashion li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Luxury li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Beauty li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Video li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Destinations li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Food & Drink li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Stay li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
News li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Videos li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Football li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Tennis li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Golf li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Motorsport li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
US Sports li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Olympics li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Space li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Life li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Solutions li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Weather li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Video li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Climate li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
As Equals li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Call to Earth li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Freedom Project li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Impact Your World li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Inside Africa li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
CNN Heroes li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
One Thing li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Tug of War li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Daily Crossword li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Jumble Crossword li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Photo Shuffle li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Sudoblock li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
Investigations li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
CNN Profiles li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
CNN Leadership li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link
CNN Newsletters li.subnav__section > ul.subnav__subsections > li.subnav__subsection > a.subnav__subsection-link

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Sign in div#desktop-header-account-nav > nav.user-account-nav > div.user-account-nav__icons > button.user-account-nav__text-button
Watch div.footer__inner > div.footer__row > div.footer__right > a.footer__video-link
Listen div.footer__inner > div.footer__row > div.footer__right > a.footer__audio-link
Sign in div#desktop-footer-account-nav > nav.user-account-nav > div.user-account-nav__icons > button.user-account-nav__text-button
○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
●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
●Background and foreground colors have a sufficient contrast ratio
●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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
○`[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
○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.
○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.
77

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
Specifying overflow: visible on img, video and canvas tags may cause them to produce visual content outside of the element bounds. See https://github.com/WICG/shared-element-transitions/blob/main/debugging_overflow_on_images.md.
edition.cnn.com/ line 6192, col -1

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
accounts.google.com/gsi/client line 81, col 88
[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.
edition.cnn.com/
Access to fetch at 'https://cdn.cookielaw.org/vendorlist/iab2V2Data.json' from origin 'https://edition.cnn.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
cdn.cookielaw.org/vendorlist/iab2V2Data.json
Failed to load resource: net::ERR_FAILED
/wbdotp/consent/3d9a6f21-8e47-43f8-8d58-d86150f3e92b/iab2...
Failed to load resource: the server responded with a status of 404 ()
registry.api.cnn.io/bundles/fave/latest-4.x/js
FAVE -->> KeyValueStore: Error invoking key/value pair function. TypeError: window.turner_getGuid is not a function at https://edition.cnn.com/:17075:1086 at n (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:266761) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:267299) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:268206) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:227494) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:355213) at https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:327406 at a.execute (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1025302) at o.dispatch (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1027406) at o.dispatch (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1025127)
registry.api.cnn.io/bundles/fave/latest-4.x/js
FAVE -->> KeyValueStore: Error invoking key/value pair function. TypeError: window.turner_getGuid is not a function at https://edition.cnn.com/:17075:1086 at n (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:266761) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:267299) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:268206) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:227494) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:355213) at https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:327574 at a.execute (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1025302) at o.dispatch (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1027406) at o.dispatch (https://registry.api.cnn.io/bundles/fave/vendor-f9ea2c98/vendor:1:1025127)
registry.api.cnn.io/bundles/fave/latest-4.x/js
FAVE -->> KeyValueStore: Error invoking key/value pair function. TypeError: window.turner_getGuid is not a function at https://edition.cnn.com/:17075:1086 at n (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:266761) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:267299) at e.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:268206) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:227494) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:355213) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:345231) at t.value (https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:338565) at https://registry.api.cnn.io/bundles/fave/boltInstance-476be30d/boltInstance:1:311229
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js
GVLError: HTTP Status: 404 response type: json at s.<anonymous> (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:37317) at q (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:2002) at Generator.<anonymous> (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:3375) at Generator.throw (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:2447) at it (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:1077) at $ (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js:1:1317)
edition.cnn.com/
Not signed in with the identity provider.
registry.api.cnn.io/bundles/fave/boltPlayer-b296f72a/boltPlayer line 1344, col 252816
Player | Player received error, stopping playback session: d2b4d017-9ac8-400f-badd-1e7f2f31fb55 code:1K-0043 message: NoKeySystemAvailable: No key system available on device undefined
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js line 6, col 113602
TypeError: Cannot convert undefined or null to object at Object.keys (<anonymous>) at n.removeInActiveVendorsForTcf (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:113603) at n.<anonymous> (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:115625) at Object.next (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:1977) at https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:947 at new Promise (<anonymous>) at F (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:698) at n.populateVendorListTCF (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:115095) at To.<anonymous> (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:151857) at Object.next (https://edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js:7:1977)

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.

URLMap URL
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js
/media/sites/js/bundles/cnn-edition-adfuel-275d6f33a8b3e5...edition.cnn.com/media/sites/js/bundles/cnn-edition-adfuel.map
edition.cnn.com/
/media/sites/js/bundles/cnn-edition-adfuel-body-1fce5e168...edition.cnn.com/media/sites/js/bundles/cnn-edition-adfuel-body.map
cdn.cxense.com/cx.cce.jscdn.cxense.com/cx.cce.js.map
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate 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.

Crawling and Indexing

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #ContentError
1Unknown ErrorSyntax not understood

To appear in search results, crawlers need access to your app.

Content Best Practices

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

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
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`

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