Lighthouse Desktop

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:39.859 source:map[column:50620 line:1 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.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:39.859 source:map[column:46070 line:0 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.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

value: No additional origins are good candidates for preconnecting

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.lego.com/newrelic.js	23.0 KiB	147 ms

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.

Request	Cache TTL	Transfer Size
/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...	300.0 s	288.8 KiB
/cdn/cs/set/assets/blt60032feac416d77d/11378_Square.png?f...	300.0 s	262.5 KiB
/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...	300.0 s	256.5 KiB
/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...	300.0 s	250.0 KiB
/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...	300.0 s	204.4 KiB
/cdn/cs/set/assets/blt882746dd0f5ff095/blta8c7f1a631ecbc8...	300.0 s	106.1 KiB
/cdn/cs/set/assets/bltd7895bf495988a25/77093_Prod.png?for...	300.0 s	74.1 KiB
/cdn/cs/set/assets/blt22ef7be6fa023f34/blt00e69bfd89abdb5...	300.0 s	70.2 KiB
/cdn/cs/set/assets/blt90ec9b36934c6763/blt1bf4465602ddf9a...	300.0 s	67.8 KiB
/cdn/cs/set/assets/blt5fa64829f3e08bad/blt99f895fe40c0a54...	300.0 s	61.2 KiB
/cdn/cs/set/assets/blt36035c8687e23c12/bltafde7384c699e00...	300.0 s	60.3 KiB
/cdn/cs/set/assets/blt278340680c8d7955/72151_Prod.png?for...	300.0 s	58.3 KiB
/cdn/cs/set/assets/blt57b9ba211b173cfc/blted58edc39398811...	300.0 s	55.7 KiB
/cdn/cs/set/assets/blt7cb1d7e438d8cf8a/blt1b09b2c44579213...	300.0 s	54.9 KiB
/cdn/cs/set/assets/blt2b8bf2f27121901f/blt40d326d8d4c91c3...	300.0 s	54.1 KiB
/cdn/cs/set/assets/bltb6f1143f4a067c4c/blt7b5cca72ee381d5...	300.0 s	51.4 KiB
/cdn/cs/set/assets/bltddbfa8d3cf72796e/blt0ed7f6db378fc08...	300.0 s	46.2 KiB
/cdn/cs/set/assets/blt397b4bd9c51db538/blt1c33118501c8da2...	300.0 s	34.6 KiB
/cdn/cs/set/assets/blt7e2eca659eddd5a8/Builderapp-060625u...	300.0 s	34.2 KiB
/cdn/cs/set/assets/blta1b8260a031d1c7e/blt0d84185b8daf3fa...	300.0 s	34.1 KiB
/cdn/cs/shopper-domain-terms/assets/bltbfaff2f2355fe6f5/_...	300.0 s	21.0 KiB
/cdn/cs/set/assets/blt32a94f4091ecc6b5/Non-Insiders_early...	300.0 s	19.9 KiB
/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...	300.0 s	19.1 KiB
/cdn/cs/set/assets/blt379b25cd2b0a2ac8/Rewards_image_(1)....	300.0 s	15.4 KiB
/cdn/cs/set/assets/blt42e0983c1dcc30aa/Articles-202504-Ho...	300.0 s	13.9 KiB
/cdn/cs/set/assets/bltd117abf568ebab9e/Non-Insiders_sale_...	300.0 s	13.8 KiB
/cdn/cs/set/assets/blt6ad7a536e76a3481/carrot-new.png?for...	300.0 s	13.3 KiB
/cdn/cs/shopper-domain-terms/assets/blt8696eaa025deec6e/A...	300.0 s	9.7 KiB
/cdn/cs/shopper-domain-terms/assets/blt1595d68b1a9c0222/I...	300.0 s	8.9 KiB
/cdn/cs/shopper-domain-terms/assets/blte27ca0e436e7bfa0/A...	300.0 s	7.8 KiB
/cdn/cs/shopper-domain-terms/assets/blt16dcde6f67f1a0e7/N...	300.0 s	6.0 KiB
/cdn/cs/shopper-domain-terms/assets/blt16b94f381b5ed3f2/E...	300.0 s	5.9 KiB
/cdn/cs/shopper-domain-terms/assets/blt700376e22277a7bc/U...	300.0 s	5.7 KiB
/cdn/cs/shopper-domain-terms/assets/blt5956113685fb44d9/G...	300.0 s	5.2 KiB
/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...	300.0 s	893 B

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.

	URL	Resource Size	Est Savings
Pikachu and Poké Ball `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...	288.3 KiB	272.0 KiB
Mario Kart™ – Luigi & Mach 8 `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...	256.0 KiB	239.7 KiB
Teenage Mutant Ninja Turtles Figures `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...	249.4 KiB	233.1 KiB
Douglas™ DC-3™ PAN AM® Airliner `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_hero-1__wXBvc > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt60032feac416d77d/11378_Square.png?f...	262.0 KiB	192.6 KiB
Tintin® Moon Rocket `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...	203.9 KiB	187.5 KiB
Ocarina of Time™ – The Final Battle `ul#carousel-container-77093 > li > picture > img`	/cdn/cs/set/assets/bltd7895bf495988a25/77093_Prod.png?for...	73.7 KiB	68.9 KiB
Golden Retriever Puppy `ul#carousel-container-11384 > li > picture > img`	/cdn/cs/set/assets/blt22ef7be6fa023f34/blt00e69bfd89abdb5...	69.8 KiB	63.9 KiB
Winnie the Pooh `ul#carousel-container-43300 > li > picture > img`	/cdn/cs/set/assets/blt90ec9b36934c6763/blt1bf4465602ddf9a...	67.3 KiB	61.9 KiB
Floating Sea Otters `ul#carousel-container-21366 > li > picture > img`	/cdn/cs/set/assets/blt5fa64829f3e08bad/blt99f895fe40c0a54...	60.7 KiB	56.5 KiB
Eevee `ul#carousel-container-72151 > li > picture > img`	/cdn/cs/set/assets/blt278340680c8d7955/72151_Prod.png?for...	57.8 KiB	51.7 KiB
Orange Cat `ul#carousel-container-21376 > li > picture > img`	/cdn/cs/set/assets/blt57b9ba211b173cfc/blted58edc39398811...	55.3 KiB	50.5 KiB
Ferrari F2004 & Michael Schumacher `ul#carousel-container-11375 > li > picture > img`	/cdn/cs/set/assets/blt7cb1d7e438d8cf8a/blt1b09b2c44579213...	54.4 KiB	48.9 KiB
Germany Postcard `ul#carousel-container-40954 > li > picture > img`	/cdn/cs/set/assets/blt2b8bf2f27121901f/blt40d326d8d4c91c3...	53.6 KiB	46.5 KiB
Teenage Mutant Ninja Turtles Figures `ul#carousel-container-40878 > li > picture > img`	/cdn/cs/set/assets/bltddbfa8d3cf72796e/blt0ed7f6db378fc08...	45.7 KiB	41.2 KiB
Douglas™ DC-3™ PAN AM® Airliner `ul#carousel-container-11378 > li > picture > img`	/cdn/cs/set/assets/blta1b8260a031d1c7e/blt0d84185b8daf3fa...	33.6 KiB	29.1 KiB
Sunflower Bouquet `ul#carousel-container-11502 > li > picture > img`	/cdn/cs/set/assets/blt397b4bd9c51db538/blt1c33118501c8da2...	34.2 KiB	28.5 KiB
LEGO minifigures of Kylian Mbappé, Lionel Messi, Cristiano Ronaldo and Vinícius… `div.StaticHero_mediaWrapper__7vMj3 > a.StaticHero_backgroundImageLink__MzbI5 > picture > img`	/cdn/cs/set/assets/blt36035c8687e23c12/bltafde7384c699e00...	59.8 KiB	17.2 KiB
Build your set with the LEGO® Builder app `li.ContentCard_contentCard__RaobR > a.ContentCard_imageLinkWrapper__rbt5v > picture.ContentCard_standardImage__M5Y5_ > img`	/cdn/cs/set/assets/blt7e2eca659eddd5a8/Builderapp-060625u...	33.8 KiB	15.9 KiB
Fully built Nike Air Max 95 LEGO Set against an orange background with the LEGO… `div.StaticHero_mediaWrapper__7vMj3 > a.StaticHero_backgroundImageLink__MzbI5 > picture > img`	/cdn/cs/set/assets/bltb6f1143f4a067c4c/blt7b5cca72ee381d5...	50.9 KiB	14.7 KiB
article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img `article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img`	/cdn/cs/set/assets/blt32a94f4091ecc6b5/Non-Insiders_early...	19.4 KiB	13.9 KiB
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/bltbfaff2f2355fe6f5/_...	20.5 KiB	11.2 KiB
div.sc-e021256c-3 > div.sc-e021256c-6 > picture.sc-e021256c-9 > img.sc-e021256c-7 `div.sc-e021256c-3 > div.sc-e021256c-6 > picture.sc-e021256c-9 > img.sc-e021256c-7`	www.lego.com/_next/static/images/play-zone-e31c48d88156eb53..webp	21.8 KiB	10.4 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: 296 ms

URL	Time Spent
www.lego.com/	296 ms
www.lego.com/en-es	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.3 s

URL	Time Spent
www.lego.com/en-es	1.4 s

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 450.1 KiB

URL	Transfer Size	Est Savings
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	386.6 KiB	272.9 KiB
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	386.6 KiB	177.1 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.

URL	Transfer Size
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	387.0 KiB
/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...	288.8 KiB
/cdn/cs/set/assets/blt60032feac416d77d/11378_Square.png?f...	262.5 KiB
/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...	256.5 KiB
/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...	250.0 KiB
/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...	204.4 KiB
/identity/callback?error=login_required&state=beJqajtOYDM...	177.1 KiB
www.lego.com/_next/static/css/8b3ee3df7a545e12.css	130.4 KiB
/cdn/cs/set/assets/blt882746dd0f5ff095/blta8c7f1a631ecbc8...	106.1 KiB
www.lego.com/en-es	79.7 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
Douglas™ DC-3™ PAN AM® Airliner `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_hero-1__wXBvc > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt60032feac416d77d/11378_Square.png?f...
Get gifting `li.ContentCard_contentCard__RaobR > a.ContentCard_imageLinkWrapper__rbt5v > picture.ContentCard_standardImage__M5Y5_ > img`	/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...
Read all about it! `li.ContentCard_contentCard__RaobR > a.ContentCard_imageLinkWrapper__rbt5v > picture.ContentCard_standardImage__M5Y5_ > img`	/cdn/cs/set/assets/blt42e0983c1dcc30aa/Articles-202504-Ho...
Build your set with the LEGO® Builder app `li.ContentCard_contentCard__RaobR > a.ContentCard_imageLinkWrapper__rbt5v > picture.ContentCard_standardImage__M5Y5_ > img`	/cdn/cs/set/assets/blt7e2eca659eddd5a8/Builderapp-060625u...
Mario Kart™ – Luigi & Mach 8 `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...
Tintin® Moon Rocket `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...
Pikachu and Poké Ball `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...
Teenage Mutant Ninja Turtles Figures `li.GalleryGridCard_galleryGridCardWrapper__WT_Ir > a.GalleryGrid_image__nJUBi > picture.GalleryGridCard_cardImage__A8ctd > img`	/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...
div.sc-e021256c-3 > div.sc-e021256c-6 > picture.sc-e021256c-9 > img.sc-e021256c-7 `div.sc-e021256c-3 > div.sc-e021256c-6 > picture.sc-e021256c-9 > img.sc-e021256c-7`	www.lego.com/_next/static/images/play-zone-e31c48d88156eb53..webp
article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img `article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img`	/cdn/cs/set/assets/bltd117abf568ebab9e/Non-Insiders_sale_...
article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img `article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img`	/cdn/cs/set/assets/blt379b25cd2b0a2ac8/Rewards_image_(1)....
article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img `article.HighlightedCard_highlightedCard__0_GED > div.HighlightedCard_imageWrapper__xyWuu > picture.HighlightedCard_image__iYBy5 > img`	/cdn/cs/set/assets/blt32a94f4091ecc6b5/Non-Insiders_early...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt700376e22277a7bc/U...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt16dcde6f67f1a0e7/N...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt5956113685fb44d9/G...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt1595d68b1a9c0222/I...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt16b94f381b5ed3f2/E...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blte27ca0e436e7bfa0/A...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/bltbfaff2f2355fe6f5/_...
li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img `li.AdvancedQuickLink_cardWrapper__pZ8yS > a.AdvancedQuickLink_cardLink__VQacu > picture.AdvancedQuickLink_cardImage__lGlix > img`	/cdn/cs/shopper-domain-terms/assets/blt8696eaa025deec6e/A...

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

●Max Potential First Input Delay 130 ms

●Layout shift culprits

●Optimize DOM size

●Font display

●LCP breakdown

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●User Timing marks and measures 15 user timings

●JavaScript execution time 1.1 s

●Minimizes main-thread work 1.8 s

●Avoid long main-thread tasks 5 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 110 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○Avoid non-composited animations

100

Accessibility

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

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
(0) `div.sc-66406b98-1 > div.sc-66406b98-2 > div.sc-66406b98-15 > a.sc-99390ee5-0`

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[role]`s are contained by their required parent element

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●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

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●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 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

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○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.

100

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

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

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.lego.com/en-es/page/free-delivery?icmp=SW-SHB-EG-NO-freesh-204	Learn more
www.lego.com/en-es/categories/f1	Learn more
www.lego.com/insiders	Learn more
www.lego.com/insiders	Learn more

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 are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid