Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

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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
nabytkar.com/template/eshop5/css/style.css?v=1789647665	37886.0 s	486.7 KiB
nabytkar.com/template/eshop5/js/script.js?v=1789647665	37885.0 s	334.8 KiB
nabytkar.com/standard/m5order/m5order.js?v=1789647665	37885.0 s	170.5 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	37885.0 s	145.7 KiB
nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665	37885.0 s	137.8 KiB
nabytkar.com/template/eshop5/special/image/logo_OPII.jpg	37885.0 s	109.4 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	37885.0 s	94.2 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...	37885.0 s	93.0 KiB
nabytkar.com/template/eshop5/js/jquery.min.js?v=1789647665	37885.0 s	85.8 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165344-ko...	37885.0 s	72.4 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165346-st...	37885.0 s	67.4 KiB
nabytkar.com/standard/m2user/m2user.js?v=1789647665	37885.0 s	61.6 KiB
nabytkar.com/template/eshop5/js/maps.js?v=1789647665	37885.0 s	60.6 KiB
nabytkar.com/template/eshop5/js/common.js?v=1789647665	37885.0 s	57.5 KiB
nabytkar.com/template/eshop5/js/k2ajax.js?v=1789647665	37885.0 s	45.5 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Bold.woff2	37886.0 s	43.6 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Semibold.woff2	37885.0 s	43.6 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Heavy.woff2	37886.0 s	43.5 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Medium.woff2	37886.0 s	43.1 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Regular.woff2	37886.0 s	43.0 KiB
nabytkar.com/template/eshop5/fonts/LatoLatin-Light.woff2	37886.0 s	42.7 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-ba...	37885.0 s	41.4 KiB
nabytkar.com/standard/m4product/m4product.js?v=1789647665	37885.0 s	26.2 KiB
nabytkar.com/standard/common/common.js?v=1789647665	37885.0 s	20.7 KiB
nabytkar.com/template/eshop5/special/image/logo.png	37886.0 s	20.0 KiB
nabytkar.com/standard/m1web/m1web.js?v=1789647665	37885.0 s	19.9 KiB
nabytkar.com/template/eshop5/css/swiper.min.css?v=1789647665	37886.0 s	15.8 KiB
nabytkar.com/template/eshop5/js/defaultTpl.js?v=1789647665	37885.0 s	15.4 KiB
nabytkar.com/template/eshop5/js/cookie.js?v=1789647665	37885.0 s	15.0 KiB
nabytkar.com/standard/m3category/m3category.js?v=1789647665	37885.0 s	14.1 KiB
www.smartsuppchat.com/loader.js?	300.0 s	5.8 KiB
nabytkar.com/template/eshop5/special/js/script.js?v=1789647665	37885.0 s	9.9 KiB
novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/4774-776888_vz.jpg?w=408	37885.0 s	9.6 KiB
nabytkar.com/template/eshop5/js/accessibility.js?v=1789647665	37885.0 s	5.5 KiB
/imgserver/eshop/nabytkar/19/2000000325/15236-801022-vz.j...	37885.0 s	4.8 KiB
novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/15048-800842.jpg?w=408	37885.0 s	3.9 KiB
nabytkar.com/standard/m5order/t5addressWhisper.js?v=1789647665	37885.0 s	3.8 KiB
nabytkar.com/special/m0nabytkar/m0nabytkar.js?v=1789647665	37885.0 s	2.9 KiB
novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/8936-774571_vz.jpg?w=408	37885.0 s	2.8 KiB
nabytkar.com/template/eshop5/image/flags/sk.svg	37885.0 s	1.4 KiB
nabytkar.com/template/eshop5/image/flags/cz.svg	37886.0 s	436 B
nabytkar.com/template/eshop5/css/print.css?v=1789647665	37885.0 s	181 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:33.074 source:map[column:54 line:27 type:source-location url:https://nabytkar.com/template/eshop5/js/script.js?v=1789647665 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:16.944 source:map[column:30 line:142 type:source-location url:https://nabytkar.com/template/eshop5/js/cookie.js?v=1789647665 urlProvider:network]] map[reflowTime:13.084 source:map[column:30 line:65 type:source-location url:https://nabytkar.com/template/eshop5/special/js/script.js?v=1789647665 urlProvider:network]] map[reflowTime:4.858 source:map[column:7507 line:12 type:source-location url:https://nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665 urlProvider:network]] map[reflowTime:7.196 source:map[column:17085 line:12 type:source-location url:https://nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665 urlProvider:network]] map[reflowTime:7.153 source:map[column:88524 line:12 type:source-location url:https://nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665 urlProvider:network]] map[reflowTime:0.484 source:map[column:22821 line:12 type:source-location url:https://nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665 urlProvider:network]] map[reflowTime:0.299 source:map[column:60 line:283 type:source-location url:https://nabytkar.com/template/eshop5/js/common.js?v=1789647665 urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:2576.93399609375 label:Time to first byte subpart:timeToFirstByte] map[duration:262.53700390625 label:Resource load delay subpart:resourceLoadDelay] map[duration:1308.303 label:Resource load duration subpart:resourceLoadDuration] map[duration:46.086 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: div.relative > a.banner_1 > picture.full_width > img.full_width

path: 1,HTML,1,BODY,3,MAIN,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,PICTURE,1,IMG

selector: div.relative > a.banner_1 > picture.full_width > img.full_width

snippet: <img src="https://novy.nabytkar.sk/imgserver/eshop/nabytkar/783/2000000325/431214716…" srcset="https://novy.nabytkar.sk/imgserver/eshop/nabytkar/783/2000000325/431214716…" alt="" class="full_width">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: div.relative > a.banner_1 > picture.full_width > img.full_width

path: 1,HTML,1,BODY,3,MAIN,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,PICTURE,1,IMG

selector: div.relative > a.banner_1 > picture.full_width > img.full_width

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

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
nabytkar.com/template/eshop5/css/style.css?v=1789647665	486.7 KiB	2.5 s
nabytkar.com/template/eshop5/css/swiper.min.css?v=1789647665	15.8 KiB	176 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.relative > a.banner_1 > picture.full_width > img.full_width `div.relative > a.banner_1 > picture.full_width > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	145.4 KiB	114.5 KiB
EU `div.flex > div.eu_logo > a > img`	nabytkar.com/template/eshop5/special/image/logo_OPII.jpg	109.1 KiB	107.0 KiB
div.bg_object_wrap > a.block > picture > img.full_width `div.bg_object_wrap > a.block > picture > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...	92.7 KiB	82.7 KiB
div.relative > a.banner_1 > picture.full_width > img.full_width `div.relative > a.banner_1 > picture.full_width > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	93.8 KiB	73.9 KiB
NABYTKAR.CZ `div.flex > div.logo_wrap > a.flex > img.logo`	nabytkar.com/template/eshop5/special/image/logo.png	19.8 KiB	19.5 KiB
4774-776888_vz `div.product_item > a#test4686 > div.product_item_img > img`	novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/4774-776888_vz.jpg?w=408	9.4 KiB	4.3 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

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: 2.4 s

URL	Time Spent
nabytkar.com/	2.5 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

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

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 530 ms 278.7 KiB

URL	Transfer Size	Est Savings
nabytkar.com/template/eshop5/js/script.js?v=1789647665	334.2 KiB	102.7 KiB
nabytkar.com/standard/m5order/m5order.js?v=1789647665	170.1 KiB	54.5 KiB
nabytkar.com/template/eshop5/js/common.js?v=1789647665	57.2 KiB	24.6 KiB
nabytkar.com/standard/m2user/m2user.js?v=1789647665	61.3 KiB	18.6 KiB
nabytkar.com/template/eshop5/js/k2ajax.js?v=1789647665	45.2 KiB	18.1 KiB
nabytkar.com/template/eshop5/js/maps.js?v=1789647665	60.3 KiB	15.2 KiB
nabytkar.com/template/eshop5/js/defaultTpl.js?v=1789647665	15.2 KiB	9.3 KiB
nabytkar.com/standard/m4product/m4product.js?v=1789647665	25.9 KiB	8.3 KiB
nabytkar.com/standard/common/common.js?v=1789647665	20.5 KiB	7.4 KiB
nabytkar.com/standard/m1web/m1web.js?v=1789647665	19.7 KiB	7.0 KiB
nabytkar.com/template/eshop5/js/cookie.js?v=1789647665	14.7 KiB	5.9 KiB
nabytkar.com/standard/m3category/m3category.js?v=1789647665	13.9 KiB	4.0 KiB
nabytkar.com/template/eshop5/special/js/script.js?v=1789647665	9.7 KiB	2.9 KiB

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: 2.1 s 475.7 KiB

URL	Transfer Size	Est Savings
nabytkar.com/template/eshop5/css/style.css?v=1789647665	485.9 KiB	461.9 KiB
nabytkar.com/template/eshop5/css/swiper.min.css?v=1789647665	15.6 KiB	13.7 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: 1.4 s 785.1 KiB

URL	Transfer Size	Est Savings
nabytkar.com/template/eshop5/js/script.js?v=1789647665	333.7 KiB	277.2 KiB
nabytkar.com/standard/m5order/m5order.js?v=1789647665	170.1 KiB	161.0 KiB
nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665	137.5 KiB	73.2 KiB
nabytkar.com/template/eshop5/js/maps.js?v=1789647665	60.2 KiB	59.3 KiB
nabytkar.com/standard/m2user/m2user.js?v=1789647665	61.3 KiB	58.4 KiB
nabytkar.com/template/eshop5/js/jquery.min.js?v=1789647665	85.5 KiB	53.8 KiB
nabytkar.com/template/eshop5/js/common.js?v=1789647665	57.0 KiB	43.3 KiB
nabytkar.com/template/eshop5/js/k2ajax.js?v=1789647665	45.2 KiB	36.2 KiB
nabytkar.com/standard/m4product/m4product.js?v=1789647665	25.9 KiB	22.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Other	1.7 s
Style & Layout	1.4 s
Rendering	905 ms
Script Evaluation	478 ms
Parse HTML & CSS	160 ms
Script Parsing & Compilation	130 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable

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
nabytkar.com/template/eshop5/css/style.css?v=1789647665	486.7 KiB
nabytkar.com/template/eshop5/special/image/favicon/favicon.ico?v=1789647665	401.6 KiB
nabytkar.com/template/eshop5/js/script.js?v=1789647665	334.8 KiB
nabytkar.com/standard/m5order/m5order.js?v=1789647665	170.5 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	145.7 KiB
nabytkar.com/template/eshop5/js/swiper.min.js?v=1789647665	137.8 KiB
nabytkar.com/template/eshop5/special/image/logo_OPII.jpg	109.4 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...	94.2 KiB
/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...	93.0 KiB
nabytkar.com/	89.9 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
NABYTKAR.CZ `div.flex > div.logo_wrap > a.flex > img.logo`	nabytkar.com/template/eshop5/special/image/logo.png
15236-801022-vz `div.product_item > a#test12671 > div.product_item_img > img`	/imgserver/eshop/nabytkar/19/2000000325/15236-801022-vz.j...
15048-800842 `div.product_item > a#test12515 > div.product_item_img > img.js_lazy_img`	novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/15048-800842.jpg?w=408
4774-776888_vz `div.product_item > a#test4686 > div.product_item_img > img`	novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/4774-776888_vz.jpg?w=408
8936-774571_vz `div.product_item > a#test8838 > div.product_item_img > img.js_lazy_img`	novy.nabytkar.sk/imgserver/eshop/nabytkar/19/2000000325/8936-774571_vz.jpg?w=408
div.relative > a.banner_1 > picture.full_width > img.full_width `div.relative > a.banner_1 > picture.full_width > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...
div.relative > a.banner_1 > picture.full_width > img.full_width `div.relative > a.banner_1 > picture.full_width > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-00...
div.relative > a.banner_1 > picture.full_width > img.full_width `div.relative > a.banner_1 > picture.full_width > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-ba...
div.bg_object_wrap > a.block > picture > img.full_width `div.bg_object_wrap > a.block > picture > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...
div.bg_object_wrap > a.block > picture > img.full_width `div.bg_object_wrap > a.block > picture > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...
div.bg_object_wrap > a.block > picture > img.full_width `div.bg_object_wrap > a.block > picture > img.full_width`	/imgserver/eshop/nabytkar/783/2000000325/4312147165334-hl...
10903-796175-nove `div.product_item > a#test10647 > div.product_item_img > img.js_lazy_img`
15045-800840_vz `div.product_item > a#test12517 > div.product_item_img > img.js_lazy_img`
15042-800837_vz `div.product_item > a#test12514 > div.product_item_img > img.js_lazy_img`
13577-796468 `div.product_item > a#test11712 > div.product_item_img > img.js_lazy_img`
14390-800200_vz `div.product_item > a#test12411 > div.product_item_img > img.js_lazy_img`
14403-800209 `div.product_item > a#test12484 > div.product_item_img > img.js_lazy_img`
14434-800237_vz `div.product_item > a#test12506 > div.product_item_img > img.js_lazy_img`
13604-796515_vz `div.product_item > a#test11739 > div.product_item_img > img.js_lazy_img`
14432-800235_vz `div.product_item > a#test12504 > div.product_item_img > img.js_lazy_img`
10937-795382-nove `div.product_item > a#test10681 > div.product_item_img > img.js_lazy_img`
div.product_item > a#test12567 > div.product_item_img > img.js_lazy_img `div.product_item > a#test12567 > div.product_item_img > img.js_lazy_img`
14782-800580_vz `div.product_item > a#test12561 > div.product_item_img > img.js_lazy_img`
13611-796516_vz `div.product_item > a#test11746 > div.product_item_img > img.js_lazy_img`
10899-795409-nove `div.product_item > a#test10643 > div.product_item_img > img.js_lazy_img`
10905-795355-nove-1 `div.product_item > a#test10649 > div.product_item_img > img.js_lazy_img`
10939-795388-nove `div.product_item > a#test10683 > div.product_item_img > img.js_lazy_img`
10940-795364-nove `div.product_item > a#test10684 > div.product_item_img > img.js_lazy_img`
10941-795394-nove `div.product_item > a#test10685 > div.product_item_img > img.js_lazy_img`
8940-775124_vz `div.product_item > a#test8842 > div.product_item_img > img.js_lazy_img`
4773-770379_vz `div.product_item > a#test4685 > div.product_item_img > img.js_lazy_img`
8356-771258-new `div.product_item > a#test8258 > div.product_item_img > img.js_lazy_img`
5974-783777_vz `div.product_item > a#test5886 > div.product_item_img > img.js_lazy_img`
5975-791127_vz `div.product_item > a#test5887 > div.product_item_img > img.js_lazy_img`
6043-776867_vz `div.product_item > a#test5955 > div.product_item_img > img.js_lazy_img`
966-775442_vz `div.product_item > a#test882 > div.product_item_img > img.js_lazy_img`
5946-783775_vz `div.product_item > a#test5858 > div.product_item_img > img.js_lazy_img`
8937-777786_vz `div.product_item > a#test8839 > div.product_item_img > img.js_lazy_img`
8941-775754_vz `div.product_item > a#test8843 > div.product_item_img > img.js_lazy_img`
8732-780894_vz `div.product_item > a#test8634 > div.product_item_img > img.js_lazy_img`
8938-782067_vz `div.product_item > a#test8840 > div.product_item_img > img.js_lazy_img`
8942-774846_vz `div.product_item > a#test8844 > div.product_item_img > img.js_lazy_img`
8144-781932-nove `div.product_item > a#test8046 > div.product_item_img > img.js_lazy_img`
4757-793265_vz `div.product_item > a#test4669 > div.product_item_img > img.js_lazy_img`
5146-772895_vz `div.product_item > a#test5058 > div.product_item_img > img.js_lazy_img`
5969-783774_vz `div.product_item > a#test5881 > div.product_item_img > img.js_lazy_img`
4761-793272_vz `div.product_item > a#test4673 > div.product_item_img > img.js_lazy_img`

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

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●JavaScript execution time 0.5 s

●Avoid long main-thread tasks 6 long tasks found

●Network Requests

●Network Round Trip Times 50 ms

●Server Backend Latencies 370 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

Accessibility

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

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.k2fx > div.k2tx > div.flex > button.header_button_basket `div.k2fx > div.k2tx > div.flex > button.header_button_basket`

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.flex > div.bannerItem > div.relative > a.banner_1 `div.flex > div.bannerItem > div.relative > a.banner_1`
div.flex > div.bannerItem > div.relative > a.banner_1 `div.flex > div.bannerItem > div.relative > a.banner_1`
div.flex > div.bannerItem > div.relative > a.banner_1 `div.flex > div.bannerItem > div.relative > a.banner_1`

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

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Novinka `div.flag_wrap > div.flag_container > div > span.flag_item`
Nabytkar s.r.o. `div.col_6 > div.youtube_channel_header > div.channel-header-center > span`
ODESLAT `div.spacing_top > div.flex > div.flex > button.k2send`

These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Vše o nákupu Obchodní podmínky Doprava a platba Reklamace Rychlá objednávka Ban… `div.footer_menu_wrap > div.flex > div.col_12 > ul.flex`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○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

●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

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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 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

○`<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.

Best Practices

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URL	Request Resolution
?w=90	Allowed

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.

Source	Description
?w=90	`Failed to load resource: net::ERR_UNKNOWN_URL_SCHEME`
nabytkar.com/	`TypeError: Cannot read properties of null (reading 'stack') at s.onerror (https://nabytkar.com/:1:488)`
www.smartsuppchat.com/loader.js? line 1, col 6258	`Uncaught Error: Missing option key`

●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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○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.

Crawling and Indexing

Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Blocking Directive Source
`head > meta`

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

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Document has a `<title>` element

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid