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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.

30

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
media.cnn.com/api/v1/loops/stellar/prod/22607136-distro.mp4?c=original300.0 s2.5 MiB
registry.api.cnn.io/bundles/fave/ui-34d81a05/ui600.0 s2.3 MiB
media.cnn.com/api/v1/loops/stellar/prod/putin-parade.mp4?c=original300.0 s2.1 MiB
media.cnn.com/api/v1/loops/stellar/prod/loop-1-10.mp4?c=original300.0 s2.0 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...300.0 s1.1 MiB
registry.api.cnn.io/bundles/fave/boltPlayer-c10c3e73/boltPlayer600.0 s654.0 KiB
media.cnn.com/api/v1/loops/stellar/prod/sedva.mp4?c=original300.0 s487.5 KiB
registry.api.cnn.io/bundles/fave/vendor-b9ed4bce/vendor600.0 s362.6 KiB
js.stripe.com/v3120.0 s231.4 KiB
/api/v1/images/stellar/prod/tsunami-edits-00-01-38-08-sti...300.0 s201.2 KiB
/api/v1/images/stellar/prod/119435-kittenrescuedmississip...300.0 s175.2 KiB
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...7200.0 s215.9 KiB
/api/v1/images/stellar/prod/119429-mamdani-tax-loophole-d...300.0 s147.9 KiB
/api/v1/images/stellar/prod/c-vitamine-k.jpg?c=16x9&q=h_5...300.0 s140.0 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js600.0 s120.9 KiB
/api/v1/images/stellar/prod/20260508-style-vienna-biennal...300.0 s110.0 KiB
/api/v1/images/stellar/prod/tt-drone-shipping.jpg?c=16x9&...300.0 s103.9 KiB
/api/v1/images/stellar/prod/diamons.jpg?c=16x9&q=h_540,w_...300.0 s100.5 KiB
cdn.tinypass.com/api/tinypass.min.js14400.0 s132.6 KiB
/api/v1/images/stellar/prod/2026-03-10t145909z-1346267152...300.0 s90.5 KiB
/api/v1/images/stellar/prod/220831101920-01-underrated-pl...300.0 s88.2 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js7200.0 s110.5 KiB
/api/v1/images/stellar/prod/shutterstock-editorial-151254...300.0 s83.8 KiB
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js0.0 ms74.7 KiB
/api/v1/images/stellar/prod/gettyimages-2275124534.jpg?c=...300.0 s76.3 KiB
/api/v1/images/stellar/prod/img-1611.jpeg?c=1x1&q=h_512,w...300.0 s62.5 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js600.0 s60.9 KiB
/api/v1/images/stellar/prod/c-ap26128713435344.jpg?c=16x9...300.0 s57.6 KiB
registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance600.0 s58.4 KiB
/api/v1/images/stellar/prod/gettyimages-2271943707.jpg?c=...300.0 s55.4 KiB
/api/v1/images/stellar/prod/gettyimages-2274483851.jpg?c=...300.0 s54.6 KiB
/api/v1/images/stellar/prod/c-gettyimages-2274051725.jpg?...300.0 s51.9 KiB
/api/v1/images/stellar/prod/shutterstock-editorial-105223...300.0 s46.8 KiB
/api/v1/images/stellar/prod/rr-iksoen-03.jpg?c=1x1&q=h_51...300.0 s43.7 KiB
/api/v1/images/stellar/prod/files-detailing-ufos.jpg?c=16...300.0 s42.9 KiB
/api/v1/images/stellar/prod/gettyimages-1229449419.jpg?c=...300.0 s41.1 KiB
/api/v1/images/stellar/prod/gettyimages-2274223011.jpg?c=...300.0 s40.9 KiB
/api/v1/images/stellar/prod/6-penguin-face-1-c-ralph-vans...300.0 s38.7 KiB
/api/v1/images/stellar/prod/spicy-crab-still-2.png?c=16x9...300.0 s37.3 KiB
/api/v1/images/stellar/prod/2024-10-08t155635z-1729036740...300.0 s36.6 KiB
/api/v1/images/stellar/prod/volcano-jpg.jpg?c=9x16&q=h_48...300.0 s35.9 KiB
/api/v1/images/stellar/prod/c-gettyimages-2274223139.jpg?...300.0 s35.8 KiB
/api/v1/images/stellar/prod/260508-ali-al-samoudi-clean-t...300.0 s34.5 KiB
registry.api.cnn.io/bundles/fave/4.41.1/css600.0 s35.8 KiB
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...7200.0 s43.7 KiB
/api/v1/images/stellar/prod/119414-david-attenborough-100...300.0 s32.7 KiB
/api/v1/images/stellar/prod/2026-05-07t175342z-140352424-...300.0 s32.6 KiB
/api/v1/images/stellar/prod/119431-venicebiennale2026-thu...300.0 s32.6 KiB
cdn.cxense.com/cx.js3600.0 s37.7 KiB
/api/v1/images/stellar/prod/119438-babymooseukraine-16x9-...300.0 s29.4 KiB
/api/v1/images/stellar/prod/still-22608527-63488-39799999...300.0 s29.0 KiB
/api/v1/images/stellar/prod/119444-xenophobic-attacks-saf...300.0 s28.3 KiB
/api/v1/images/stellar/prod/thumb-1-20260508105614356.jpg...300.0 s27.9 KiB
/api/v1/images/stellar/prod/ship-20260508214345413.jpg?c=...300.0 s27.8 KiB
/api/v1/images/stellar/prod/renamethisvertical-00-00-08-2...300.0 s27.5 KiB
/api/v1/images/stellar/prod/119445-gupta-hantavirus-thumb...300.0 s25.3 KiB
/api/v1/images/stellar/prod/tnprotests.jpg?c=9x16&q=h_480...300.0 s25.2 KiB
/api/v1/images/stellar/prod/gettyimages-2237836741-202605...300.0 s25.1 KiB
/api/v1/images/stellar/prod/ap26126767622981.jpg?c=1x1&q=...300.0 s24.9 KiB
/api/v1/images/stellar/prod/gettyimages-2271883091.jpg?c=...300.0 s24.7 KiB
/api/v1/images/stellar/prod/119438-babymooseukraine-vrtc-...300.0 s24.4 KiB
edition.cnn.com/media/sites/cnn/app-store-cnn-app-qr-code.png60.0 s23.0 KiB
/api/v1/images/stellar/prod/119453-canvas-hacked-natasha-...300.0 s23.3 KiB
edition.cnn.com/media/sites/cnn/google-play-cnn-app-qr-code.png60.0 s22.3 KiB
/api/v1/images/stellar/prod/221014111641-kristin-smart-fi...300.0 s23.1 KiB
/api/v1/images/stellar/prod/ap26124638114342.jpg?c=1x1&q=...300.0 s22.9 KiB
/api/v1/images/stellar/prod/jake-tapper-va-redistricting-...300.0 s22.6 KiB
/api/v1/images/stellar/prod/119445-gupta-hantavirus-thumb...300.0 s22.4 KiB
/api/v1/images/stellar/prod/the-ourry-and-jersey-portrait...300.0 s22.3 KiB
/api/v1/images/stellar/prod/119442-russiavictorydayparade...300.0 s21.9 KiB
/api/v1/images/stellar/prod/adp-still-6.jpg?c=1x1&q=h_512...300.0 s21.8 KiB
/api/v1/images/stellar/prod/119430-flfathersonrescue-vrtc...300.0 s21.8 KiB
/api/v1/images/stellar/prod/260508-rubio-vrtc.jpg?c=9x16&...300.0 s21.7 KiB
/api/v1/images/stellar/prod/119454-kristin-smart-case-cle...300.0 s21.1 KiB
/api/v1/images/stellar/prod/01-260501-ciudad-primavera-to...300.0 s19.1 KiB
/api/v1/images/stellar/prod/119437-trumpreflectingpoolabc...300.0 s18.6 KiB
/api/v1/images/stellar/prod/119434-kamalaharrisiran-vrtc-...300.0 s18.3 KiB
/api/v1/images/stellar/prod/gettyimages-2250705889a.JPG?c...300.0 s18.2 KiB
/api/v1/images/stellar/prod/trump-pool.jpg?c=9x16&q=h_480...300.0 s18.1 KiB
/api/v1/images/stellar/prod/gettyimages-2255281101.jpg?c=...300.0 s17.8 KiB
/api/v1/images/stellar/prod/2026-05-06t201410z-1890501339...300.0 s17.1 KiB
m.stripe.network/out-4.5.45.js300.0 s16.8 KiB
/launch/7be62238e4c3/97fa00444124/b278aa9dd3f4/EX33692741...0.0 ms14.5 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js7200.0 s17.6 KiB
/api/v1/images/stellar/prod/119450-motherlesssitetakenoff...300.0 s12.8 KiB
/api/v1/images/stellar/prod/gettyimages-2252600954.jpg?c=...300.0 s12.2 KiB
/api/v1/images/stellar/prod/02-2022-05-12t193457z-1621421...300.0 s11.0 KiB
/api/v1/images/stellar/prod/gettyimages-687321046-copy-20...300.0 s10.1 KiB
/api/v1/images/stellar/prod/119448-pentagonufofilesshortc...300.0 s8.5 KiB
/api/v1/images/stellar/prod/still-22605253-0-thumb-202605...300.0 s7.6 KiB
cdn.ml314.com/taglw.js3600.0 s8.5 KiB
edition.cnn.com/wbdotp/scripttemplates/otSDKStub.js7200.0 s8.8 KiB
cdn.cxense.com/cx.cce.js3600.0 s6.8 KiB
registry.api.cnn.io/bundles/fave/4.41.1/app600.0 s4.2 KiB
rules.quantcount.com/rules-p-D1yc5zQgjmqr5.js3600.0 s4.3 KiB
sb.scorecardresearch.com/internal-cs/default/beacon-and.js86400.0 s7.9 KiB
edition.cnn.com/media/sites/cnn/video-placeholder.svg60.0 s1.7 KiB
experience.piano.io/xbuilder/experience/load?aid=RCoM2QBLpu1800.0 s1.8 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/ui-search.svg60.0 s1.3 KiB
edition.cnn.com/media/sites/cnn/icons/ui-speech-bubble.svg60.0 s1.3 KiB
registry.api.cnn.io/bundles/fave/4.41.1/vendorHashes600.0 s541 B
/Repo/rep.gif?ver=3.4.0&typ=pgv&rnd=moy3mxe0bf7gvadp&sid=...0.0 ms412 B

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/noto_serif-v1.woff245 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-bold-v1.woff235 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-v1.woff230 ms
edition.cnn.com/fonts/cnn/cnn_sans_display-medium-v1.woff225 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:15.762 source:map[column:327049 line:1 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:27.026 source:map[column:473 line:16231 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.985 source:map[column:1040 line:15537 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.494 source:map[column:588 line:16225 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.948 source:map[column:884 line:16226 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.134 source:map[column:1858 line:15548 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.069 source:map[column:865 line:15548 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.284 source:map[column:594 line:15548 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.302 source:map[column:1726 line:16231 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:0.457 source:map[column:315 line:15194 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:2.208 source:map[column:13045 line:16238 type:source-location url:https://edition.cnn.com/ urlProvider:network]] map[reflowTime:18.27 source:map[type:text value:[unattributed]]] map[reflowTime:15.762 source:map[column:327105 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
CNN_Headlines_International_Placeholder_Generic.png div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB1.1 MiB
20260508-STYLE-Vienna-Biennale-Politics-1.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/20260508-style-vienna-biennal...109.4 KiB68.9 KiB
diamons.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/diamons.jpg?c=16x9&q=h_540,w_...100.0 KiB59.5 KiB
Passengers on the the hantavirus-stricken cruise ship, MV Hondius, watch epidem… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/c-ap26128713435344.jpg?c=16x9...57.0 KiB29.7 KiB
House Minority Leader Hakeem Jeffries at the Democratic National Committee on A… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2271943707.jpg?c=...54.9 KiB28.5 KiB
A vehicle at an Irving gas station in Winthrop, Maine, US, on Tuesday, May 5. div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/gettyimages-2274483851.jpg?c=...54.1 KiB28.1 KiB
TREMONTON, UTAH - MAY 4: Protesters gather ahead of a Box Elder County County C… div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/c-gettyimages-2274051725.jpg?...51.3 KiB26.7 KiB
shutterstock_editorial_10522359k.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/shutterstock-editorial-105223...46.2 KiB24.0 KiB
files detailing UFOs.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/files-detailing-ufos.jpg?c=16...42.4 KiB22.0 KiB
119438_BabyMooseUkraine 16x9 thumb cln.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/119438-babymooseukraine-16x9-...28.8 KiB15.0 KiB
still_22608527_63488.397999999994_still.jpg div.image > div.image__container > picture.image__picture > img.image__dam-img
/api/v1/images/stellar/prod/still-22608527-63488-39799999...28.5 KiB14.8 KiB

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

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.

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: 754 ms
URLTime Spent
www.cnn.com/754 ms
edition.cnn.com/0.0 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 165.9 KiB
URLTransfer SizeEst Savings
@font-face { font-family: "cnn_sans_condensed"; font-weight: 700; … } …153.5 KiB130.4 KiB
registry.api.cnn.io/bundles/fave/4.41.1/css35.6 KiB35.5 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: 1.1 s 1.7 MiB
URLTransfer SizeEst Savings
registry.api.cnn.io/bundles/fave/boltPlayer-c10c3e73/boltPlayer653.5 KiB436.8 KiB
registry.api.cnn.io/bundles/fave/vendor-b9ed4bce/vendor352.3 KiB256.1 KiB
registry.api.cnn.io/bundles/fave/ui-34d81a05/ui2.3 MiB247.3 KiB
js.stripe.com/v3230.9 KiB169.0 KiB
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...215.1 KiB158.4 KiB
edition.cnn.com/193.4 KiB131.9 KiB
cdn.tinypass.com/api/tinypass.min.js132.1 KiB83.0 KiB
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js110.0 KiB81.1 KiB
cdn.optimizely.com/public/125375509/s/landingprod.js120.3 KiB69.8 KiB
registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance57.9 KiB34.7 KiB
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...43.3 KiB29.0 KiB
registry.api.cnn.io/bundles/fave/latest-4.x/js60.4 KiB28.2 KiB
cdn.cxense.com/cx.js37.1 KiB21.9 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/2.9 s672 ms306 ms
Unattributable1.2 s49 ms0.0 ms
registry.api.cnn.io/bundles/fave/boltPlayer-c10c3e73/boltPlayer708 ms505 ms180 ms
/media/sites/js/bundles/cnn-edition-adfuel-e30d4ed1f85bf5...484 ms430 ms52 ms
registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance460 ms411 ms15 ms
cdn.tinypass.com/api/tinypass.min.js431 ms236 ms33 ms
registry.api.cnn.io/bundles/fave/ui-34d81a05/ui339 ms88 ms251 ms
registry.api.cnn.io/bundles/fave/vendor-b9ed4bce/vendor295 ms124 ms112 ms
js.stripe.com/v3267 ms146 ms120 ms
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...209 ms174 ms21 ms
lightning.cnn.com/launch/7be62238e4c3/97fa00444124/launch-2878c87af5e3.min.js193 ms150 ms36 ms
cdn.cxense.com/cx.js158 ms67 ms9.5 ms
cdn.optimizely.com/public/125375509/s/landingprod.js138 ms85 ms36 ms
registry.api.cnn.io/bundles/fave/latest-4.x/js112 ms91 ms12 ms
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otTCF.js70 ms62 ms4.1 ms
edition.cnn.com/wbdotp/scripttemplates/202601.2.0/otBannerSdk.js58 ms24 ms33 ms
edition.cnn.com/wbdotp/scripttemplates/otSDKStub.js56 ms22 ms2.4 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation3.5 s
Other1.8 s
Script Parsing & Compilation1.2 s
Style & Layout1.1 s
Parse HTML & CSS396 ms
Rendering292 ms
Garbage Collection27 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
media.cnn.com/api/v1/loops/stellar/prod/22607136-distro.mp4?c=original2.5 MiB
registry.api.cnn.io/bundles/fave/ui-34d81a05/ui2.3 MiB
media.cnn.com/api/v1/loops/stellar/prod/putin-parade.mp4?c=original2.1 MiB
media.cnn.com/api/v1/loops/stellar/prod/loop-1-10.mp4?c=original2.0 MiB
/api/v1/images/stellar/prod/cnn-headlines-international-p...1.1 MiB
registry.api.cnn.io/bundles/fave/boltPlayer-c10c3e73/boltPlayer654.0 KiB
edition.cnn.com/513.8 KiB
media.cnn.com/api/v1/loops/stellar/prod/sedva.mp4?c=original487.5 KiB
registry.api.cnn.io/bundles/fave/vendor-b9ed4bce/vendor362.6 KiB
js.stripe.com/v3231.4 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 11 user timings
●Avoid long main-thread tasks 20 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 170 ms
●Server Backend Latencies 120 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
○Avoid large layout shifts
96

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

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.zone > div.zone__inner > div.zone__kicker > a.zone__kicker-url div.zone > div.zone__inner > div.zone__kicker > a.zone__kicker-url
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
div.container__field-wrapper > div.container__field-links > div.card > a.container__link div.container__field-wrapper > div.container__field-links > div.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.

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#mobile-footer-account-nav > nav.user-account-nav > div.user-account-nav__icons > button.user-account-nav__text-button
Listen div.layout__bottom > footer#pageFooter > div.footer__inner > a.footer__audio-link
Watch div.layout__bottom > footer#pageFooter > div.footer__inner > a.footer__video-link
○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
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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
●`<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
○`<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
○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.
○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.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
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/:15911:1086 at k._processKeyValuePairs (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:155113) at k.getKeyValuePairs (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:156964) at L._updateAdKvpsConfig (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:131238) at L._updateAudioKeyValuePairs (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:214389) at L._setSound (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:204878) at L._handleCallback (https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:198382) at https://registry.api.cnn.io/bundles/fave/boltInstance-f8f379b1/boltInstance:1:169732
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/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-e30d4ed1f85bf5...edition.cnn.com/media/sites/js/bundles/cnn-edition-adfuel.map
edition.cnn.com/
/media/sites/js/bundles/cnn-edition-adfuel-body-4f5702656...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 deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
85

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

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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