Lighthouse Mobile

· 0 checks — Mobile 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.

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/blt60032feac416d77d/11378_Square.png?f...	300.0 s	1.0 MiB
/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...	300.0 s	1.0 MiB
/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...	300.0 s	908.4 KiB
/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...	300.0 s	902.1 KiB
/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...	300.0 s	785.0 KiB
/cdn/cs/set/assets/blt7e2eca659eddd5a8/Builderapp-060625u...	300.0 s	122.5 KiB
/cdn/cs/set/assets/blt22ef7be6fa023f34/blt00e69bfd89abdb5...	300.0 s	76.4 KiB
/cdn/cs/set/assets/bltd7895bf495988a25/77093_Prod.png?for...	300.0 s	63.0 KiB
/cdn/cs/set/assets/blt5fa64829f3e08bad/blt99f895fe40c0a54...	300.0 s	59.4 KiB
/cdn/cs/set/assets/blt38342f6234253e7a/blta8c7f1a631ecbc8...	300.0 s	53.9 KiB
/cdn/cs/set/assets/blt278340680c8d7955/72151_Prod.png?for...	300.0 s	52.4 KiB
/cdn/cs/set/assets/blt7cb1d7e438d8cf8a/blt1b09b2c44579213...	300.0 s	50.8 KiB
/cdn/cs/set/assets/blt2b8bf2f27121901f/blt40d326d8d4c91c3...	300.0 s	46.0 KiB
/cdn/cs/set/assets/bltdc0af9e98666b254/blt7b5cca72ee381d5...	300.0 s	41.6 KiB
/cdn/cs/set/assets/bltddbfa8d3cf72796e/blt0ed7f6db378fc08...	300.0 s	37.5 KiB
/cdn/cs/set/assets/blta1b8260a031d1c7e/blt0d84185b8daf3fa...	300.0 s	31.7 KiB
/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...	300.0 s	29.2 KiB
/cdn/cs/set/assets/blt6f96bf26b62db343/bltafde7384c699e00...	300.0 s	29.2 KiB
/cdn/cs/set/assets/blt42e0983c1dcc30aa/Articles-202504-Ho...	300.0 s	26.2 KiB
/cdn/cs/shopper-domain-terms/assets/blt8696eaa025deec6e/A...	300.0 s	20.7 KiB
/cdn/cs/shopper-domain-terms/assets/blt1595d68b1a9c0222/I...	300.0 s	17.5 KiB
/cdn/cs/shopper-domain-terms/assets/bltbfaff2f2355fe6f5/_...	300.0 s	15.6 KiB
/cdn/cs/shopper-domain-terms/assets/blte27ca0e436e7bfa0/A...	300.0 s	14.4 KiB
/cdn/cs/set/assets/blt6ad7a536e76a3481/carrot-new.png?for...	300.0 s	13.3 KiB
/cdn/cs/shopper-domain-terms/assets/blt16b94f381b5ed3f2/E...	300.0 s	12.1 KiB
/cdn/cs/shopper-domain-terms/assets/blt16dcde6f67f1a0e7/N...	300.0 s	11.0 KiB
/cdn/cs/shopper-domain-terms/assets/blt700376e22277a7bc/U...	300.0 s	9.6 KiB
/cdn/cs/shopper-domain-terms/assets/blt5956113685fb44d9/G...	300.0 s	9.1 KiB
/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...	300.0 s	894 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.

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:31.333 source:map[column:7960 line:25 type:source-location url:https://www.lego.com/_next/static/chunks/framework-743a406e6ea89f42.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:27.855 source:map[type:text value:[unattributed]]] map[reflowTime:0.167 source:map[column:23489 line:4278 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js urlProvider:network]] map[reflowTime:0.578 source:map[column:600 line:0 type:source-location url:https://www.lego.com/_next/static/chunks/4980.7ddf3475910cbe4f.js urlProvider:network]] map[reflowTime:15.718 source:map[column:64988 line:0 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js urlProvider:network]] map[reflowTime:0.375 source:map[column:23219 line:6 type:source-location url:https://www.lego.com/_next/static/chunks/3598.dafcda5fba482f0c.js urlProvider:network]] map[reflowTime:0.744 source:map[column:8823 line:2161 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js urlProvider:network]] map[reflowTime:0.855 source:map[column:29572 line:5164 type:source-location url:https://www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js urlProvider:network]] map[reflowTime:12.896 source:map[column:89267 line:4952 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

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
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...	1.0 MiB	1.0 MiB
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...	1.0 MiB	979.6 KiB
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...	907.7 KiB	889.7 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...	901.4 KiB	883.4 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...	784.3 KiB	766.3 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...	122.1 KiB	100.8 KiB
Golden Retriever Puppy `ul#carousel-container-11384 > li > picture > img`	/cdn/cs/set/assets/blt22ef7be6fa023f34/blt00e69bfd89abdb5...	76.0 KiB	56.8 KiB
Ocarina of Time™ – The Final Battle `ul#carousel-container-77093 > li > picture > img`	/cdn/cs/set/assets/bltd7895bf495988a25/77093_Prod.png?for...	62.6 KiB	47.0 KiB
Floating Sea Otters `ul#carousel-container-21366 > li > picture > img`	/cdn/cs/set/assets/blt5fa64829f3e08bad/blt99f895fe40c0a54...	58.9 KiB	45.2 KiB
Ferrari F2004 & Michael Schumacher `ul#carousel-container-11375 > li > picture > img`	/cdn/cs/set/assets/blt7cb1d7e438d8cf8a/blt1b09b2c44579213...	50.3 KiB	35.9 KiB
Eevee `ul#carousel-container-72151 > li > picture > img`	/cdn/cs/set/assets/blt278340680c8d7955/72151_Prod.png?for...	52.0 KiB	32.0 KiB
Germany Postcard `ul#carousel-container-40954 > li > picture > img`	/cdn/cs/set/assets/blt2b8bf2f27121901f/blt40d326d8d4c91c3...	45.5 KiB	27.2 KiB
Teenage Mutant Ninja Turtles Figures `ul#carousel-container-40878 > li > picture > img`	/cdn/cs/set/assets/bltddbfa8d3cf72796e/blt0ed7f6db378fc08...	37.0 KiB	25.3 KiB
Get gifting `li.ContentCard_contentCard__RaobR > a.ContentCard_imageLinkWrapper__rbt5v > picture.ContentCard_standardImage__M5Y5_ > img`	/cdn/cs/set/assets/blt3e8dc492e10988fa/Giftgiving-202504-...	28.7 KiB	20.2 KiB
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...	25.7 KiB	18.1 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/blt8696eaa025deec6e/A...	20.3 KiB	16.5 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/blt1595d68b1a9c0222/I...	17.1 KiB	13.9 KiB
Douglas™ DC-3™ PAN AM® Airliner `ul#carousel-container-11378 > li > picture > img`	/cdn/cs/set/assets/blta1b8260a031d1c7e/blt0d84185b8daf3fa...	31.2 KiB	13.2 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

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
www.lego.com/newrelic.js	23.0 KiB

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: 855 ms

URL	Time Spent
www.lego.com/	855 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: 648 ms

URL	Time Spent
www.lego.com/en-es	748 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

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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.lego.com/_next/static/chunks/framework-743a406e6ea89f42.js	3.6 s	3.2 s	50 ms
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	1.7 s	876 ms	359 ms
Unattributable	1.5 s	276 ms	0.0 ms
www.lego.com/en-es	825 ms	26 ms	1.4 ms
www.lego.com/newrelic.js	302 ms	240 ms	20 ms
js-agent.newrelic.com/nr-spa-1.297.1.min.js	206 ms	185 ms	18 ms
www.lego.com/_next/static/chunks/main-3cf843881433361b.js	146 ms	119 ms	24 ms
www.lego.com/_next/static/chunks/pages/%5Blocale%5D-abb08fe9efd697fd.js	122 ms	118 ms	3.4 ms
/identity/callback?error=login_required&state=kQYdGoERDyu...	98 ms	0.2 ms	0.3 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.

Category	Time Spent
Script Evaluation	5.1 s
Other	1.6 s
Style & Layout	740 ms
Script Parsing & Compilation	517 ms
Parse HTML & CSS	258 ms
Garbage Collection	236 ms
Rendering	197 ms

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 446.0 KiB

URL	Transfer Size	Est Savings
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	386.7 KiB	273.0 KiB
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	386.7 KiB	173.0 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
/cdn/cs/set/assets/blt60032feac416d77d/11378_Square.png?f...	1.0 MiB
/cdn/cs/set/assets/bltbaf582bfb07a523c/72050_Square.png?f...	1.0 MiB
/cdn/cs/set/assets/blt456f434936e079ba/72152_Square_v3.pn...	908.4 KiB
/cdn/cs/set/assets/blte9cb7be5ac6c640c/40878_Square.png?f...	902.1 KiB
/cdn/cs/set/assets/blt43850a9b9b1bbe93/21367_Square.png?f...	785.0 KiB
www.lego.com/_next/static/chunks/pages/_app-97dbd3923c220aee.js	387.1 KiB
/identity/callback?error=login_required&state=kQYdGoERDyu...	177.3 KiB
www.lego.com/_next/static/css/8b3ee3df7a545e12.css	129.4 KiB
/cdn/cs/set/assets/blt7e2eca659eddd5a8/Builderapp-060625u...	122.5 KiB
www.lego.com/en-es	79.9 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...
facebook `div.sc-280db90b-0 > div.sc-182665f7-0 > a.sc-99390ee5-0 > img`	www.lego.com/_next/static/images/facebook-272324dea27d9f89..svg
instagram `div.sc-280db90b-0 > div.sc-182665f7-0 > a.sc-99390ee5-0 > img`	www.lego.com/_next/static/images/instagram-5a9620c7f4368988..svg
youtube `div.sc-280db90b-0 > div.sc-182665f7-0 > a.sc-99390ee5-0 > img`	www.lego.com/_next/static/images/youtube-15755d90b590e150..svg
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`
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`
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`
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/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...

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

●Layout shift culprits

●Optimize DOM size

●Font display

●LCP breakdown

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●User Timing marks and measures 20 user timings

●Avoid long main-thread tasks 20 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 100 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 4 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.

○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

●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.

○Skip links are focusable.

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

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

○`[lang]` attributes have a valid value

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

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

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

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