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 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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:72.364 source:map[column:15853 line:6 type:source-location url:https://d70shl7vidtft.cloudfront.net/ecmtr-2.4.2.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.

	URL	Resource Size	Est Savings
video-thumbnail `div.col-lg-7 > div.position-relative > div#video-container-ad9d5 > img.video-thumbnail`	psichologie.cz/images/home/home-hero.webp	129.0 KiB	112.5 KiB
Kniha `div.row > div.col-lg-7 > div.book-container > img.book`	psichologie.cz/images/book.webp	25.8 KiB	20.5 KiB
video-thumbnail `div.row > div.podcast > div#video-container-1b224 > img.video-thumbnail`	psichologie.cz/media/n1mlyzln.webp	24.3 KiB	15.9 KiB
Podcast logo `div.podcast > div.top > div.podcast-logo > img`	psichologie.cz/images/home/podcast-logo.webp	15.4 KiB	14.8 KiB
Tellington TTouch `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/v2uncwub.webp	21.7 KiB	12.5 KiB
Kozokurz - Principy tréninku psů `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/s3f0ky0c.webp	20.5 KiB	11.2 KiB
Vůdce smečky `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/1djbi02t.webp	19.5 KiB	10.3 KiB
Nosework `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/mppskvur.webp	19.0 KiB	9.7 KiB
Čmuchací hry `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/a45r3wct.webp	18.7 KiB	9.4 KiB
Tahání na vodítku `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/ktckgukq.webp	18.6 KiB	9.4 KiB
Psí fitness II - rovnováha a posilování psa `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/n1mldtup.webp	18.1 KiB	8.8 KiB
Vodítko jako nápověda `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/ol0cjq1p.webp	16.8 KiB	7.5 KiB
10 nejdůležitějších povelů `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/420cjcer.webp	16.5 KiB	7.2 KiB
Dogdancing - Psí triky 1 `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/41fc5bkp.webp	16.3 KiB	7.1 KiB
Dog puller `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/xwnin4dz.webp	16.2 KiB	6.9 KiB
Spolehlivost bez vodítka `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/lwtf4rm5.webp	16.1 KiB	6.8 KiB
Moderní trénink psa pro zaneprázdněné `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/fh0phot1.webp	16.0 KiB	6.7 KiB
Enrichment pro psy `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/petrrqro.webp	16.0 KiB	6.7 KiB
Soužití malého dítěte a psa `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/prtkjdv0.webp	15.8 KiB	6.5 KiB
Dogdancing - Psí triky 2 `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/3brvnwqp.webp	15.4 KiB	6.1 KiB
Funkční přivolání psa `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/bcsd5wgi.webp	15.2 KiB	5.9 KiB
Jak naučit psa ČEKEJ `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/4o3kleta.webp	15.1 KiB	5.8 KiB
Komunikační signály pro pokročilé `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/k2hed0si.webp	14.5 KiB	5.2 KiB
Psí fitness I. - pes v pohybu `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/sziitrvs.webp	14.3 KiB	5.1 KiB
Kočkokurz - výchova a trénink kočky `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/snbjiwor.webp	12.8 KiB	4.2 KiB
Skákání psa při vítání `div.course-card > div.part > div.img-container > img`	psichologie.cz/media/x0ixcbpj.webp	12.3 KiB	4.0 KiB

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:189.708 label:Time to first byte subpart:timeToFirstByte] map[duration:15.641 label:Resource load delay subpart:resourceLoadDelay] map[duration:108.054 label:Resource load duration subpart:resourceLoadDuration] map[duration:2971.12 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: video-thumbnail

path: 1,HTML,1,BODY,3,DIV,4,MAIN,8,ARTICLE,0,SECTION,0,DIV,0,DIV,2,DIV,0,DIV,5,DIV,1,IMG

selector: div.col-lg-7 > div.position-relative > div#video-container-ad9d5 > img.video-thumbnail

snippet: <img src="images/home/home-hero.webp" alt="video-thumbnail" class="video-thumbnail" fetchpriority="high">

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

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
d70shl7vidtft.cloudfront.net/ecmtr-2.4.2.js	0.0 ms	18.4 KiB
cdn.vidstack.io/player/theme.css	604800.0 s	10.2 KiB
/i?stm=1788877858063&e=pv&url=https%3A%2F%2Fpsichologie.c...	0.0 ms	359 B
cdn.vidstack.io/player/video.css	604800.0 s	2.9 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
psichologie.cz/Server.wktxldxo4i.styles.css	523 B
psichologie.cz/css/product-page.lx72rrazbf.css	772 B

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

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: 180 ms 27.7 KiB

URL	Transfer Size	Est Savings
psichologie.cz/_framework/dotnet.native.7dko1v9rxe.js	61.4 KiB	27.7 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: 710 ms 114.5 KiB

URL	Transfer Size	Est Savings
psichologie.cz/_framework/blazor.web.js	54.8 KiB	40.6 KiB
psichologie.cz/_framework/dotnet.native.7dko1v9rxe.js	61.4 KiB	38.2 KiB
psichologie.cz/_framework/dotnet.runtime.zbexyp8zrs.js	55.3 KiB	35.7 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
psichologie.cz/_framework/blazor.web.js	6.3 s	5.9 s	18 ms
Unattributable	2.0 s	657 ms	0.0 ms
psichologie.cz/_framework/dotnet.native.7dko1v9rxe.js	1.3 s	1.3 s	0.8 ms
psichologie.cz/	748 ms	15 ms	2.0 ms
d70shl7vidtft.cloudfront.net/ecmtr-2.4.2.js	580 ms	146 ms	7.5 ms
psichologie.cz/js/carousel.86ps4ni65l.js	406 ms	311 ms	0.2 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	8.4 s
Other	1.7 s
Style & Layout	756 ms
Parse HTML & CSS	373 ms
Rendering	203 ms
Script Parsing & Compilation	38 ms
Garbage Collection	21 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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 3.2 KiB

URL	Transfer Size	Est Savings
psichologie.cz/css/bootstrap-custom.gubimwjwap.css	13.8 KiB	3.2 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: 0.0 ms 27.4 KiB

URL	Transfer Size	Est Savings
psichologie.cz/icons/remixicon.b1a2q9j3o5.css	14.5 KiB	14.4 KiB
psichologie.cz/css/bootstrap-custom.gubimwjwap.css	13.5 KiB	13.0 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
psichologie.cz/_framework/dotnet.native.80swe1zwdl.wasm	1.1 MiB
psichologie.cz/_framework/System.Private.CoreLib.7kn5yt7cmc.wasm	707.2 KiB
psichologie.cz/_framework/System.Private.Xml.ayjrnh8rrd.wasm	425.5 KiB
psichologie.cz/_framework/icudt.oh1zvcfom8.dat	322.6 KiB
psichologie.cz/_framework/Newtonsoft.Json.qkbufwhni2.wasm	248.1 KiB
psichologie.cz/_framework/System.Data.Common.5kl4ez6mve.wasm	182.2 KiB
psichologie.cz/_framework/Client.imu42fe36k.wasm	179.7 KiB
psichologie.cz/fonts/Poppins-Italic.ttf	178.1 KiB
psichologie.cz/icons/remixicon.woff2?t=1734404658139	173.0 KiB
psichologie.cz/_framework/System.Linq.Expressions.fd4f0adxdx.wasm	158.6 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
Kniha `div.row > div.col-lg-7 > div.book-container > img.book`	psichologie.cz/images/book.webp
Dog `div.col-12 > div.bckgr-violet-1 > div.left-main-flex > img.dog-stretching`	psichologie.cz/images/dog-silouethes/dog-stretching.svg
Podcast logo `div.podcast > div.top > div.podcast-logo > img`	psichologie.cz/images/home/podcast-logo.webp
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/ct1.svg
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/social-impact-award.svg
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/pozitivni-zpravy.png
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/nova.svg
Proč nebýt vůdce smečky `div.d-flex > div.d-flex > div.position-relative > img.ebook`	psichologie.cz/images/e-book.webp
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/forbes.svg
Psíchologie logo `div.col-12 > div.d-flex > div > img.psichologie-logo`	psichologie.cz/images/psichologie-logo-white.svg
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/cesky-rozhlas.svg
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/cesky-rozhlas.svg
Logo `div.carousel-content > div.carousel-item > a.external-article > img.logo`	psichologie.cz/images/logos/idnes.svg

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Avoid long main-thread tasks 19 long tasks found

●Avoid non-composited animations 8 animated elements found

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 100 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 110 ms

○INP breakdown

○User Timing marks and measures

○Avoid large layout shifts

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.position-relative > div.top-row-content > div.d-flex > button.btn `div.position-relative > div.top-row-content > div.d-flex > button.btn`

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
Prozkoumat kurzy `div.mt-20 > button.btn > div.btn-content > span.content`
ZDARMA `div.course-card > div.part > div.category-tags > label.small`
PRVNÍ PES `div.course-card > div.part > div.category-tags > label.small`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
PRVNÍ PES `div.course-card > div.part > div.category-tags > label.small`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
Detail kurzu `div.part > a.btn > div.btn-content > span.content`
10 000+ `div.row > div.col-lg-5 > h2.m-0 > span.color-blue-2`
VIDEO KURZ ZDARMA `div.row > div.col-lg-7 > div.book-container > label.floating-tag`
PROČ NEBÝT VŮDCE SMEČKY `div.d-flex > div.d-flex > div.flex-shrink-1 > h3.m-0`
Nejdůležitější pravidlo pro výchovu a trénink psa `div.d-flex > div.d-flex > div.flex-shrink-1 > p.mt-10`
Odesláním souhlasíte, že vám můžeme posílat informace o psích novinkách a kurze… `div.d-flex > div.d-flex > div.flex-shrink-1 > small.mt-15`
Zásady zpracování osobních údajů `div.d-flex > div.flex-shrink-1 > small.mt-15 > a.color-grey-2`
PODCAST `div.podcast > div.top > h3.m-0 > label.small`
BLOG `div.blog > div.top > h3.m-0 > label.small`
Psichologie. Oceněný projekt tréninku psů bez klasických trestů přeroste Česko `div.carousel-content > div.carousel-item > a.external-article > p.medium`
Rozhovor s Tomášem Nushartem v pořadu Host Lucie Výborné `div.carousel-content > div.carousel-item > a.external-article > p.medium`
KAŽDÝCH 14 DNÍ ZDARMA `div.row > div.col-12 > div.bckgr-violet-1 > label.floating-tag`
Copyright © 2026 Psichologie.cz s.r.o. `div.bckgr-grey-2 > div.container > div.d-flex > small`
Přijmout vše `div.cookie-consent-actions > button.btn > div.btn-content > span.content`

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
13 nebezpečných věcí, kterými můžeme pejskovi ublížit `div.course-card > div.part > div > h5.mt-0`
Separační úzkost `div.course-card > div.part > div > h5.mt-0`
Vodítko jako nápověda `div.course-card > div.part > div > h5.mt-0`
Nosework `div.course-card > div.part > div > h5.mt-0`
#118 Daniel Kortus: Jak poznat klimatickou dezinformaci a může za změnu klimatu… `div.d-flex > div.d-flex > div > h5.mt-0`
Láska na čtyřech tlapkách: První máj očima pejskařů `div.blog-post-preview > div.text > a.text-decoration-none > h5.mt-0`
tomas@psichologie.cz `div.col-12 > div.d-flex > div > h5.m-0`

These are opportunities to improve keyboard navigation in your application.

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
Prozkoumat kurzy `div.row > div.col-lg-5 > div.mt-20 > button.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Zobrazit všechny kurzy `section#popularni-kurzy > div.container > div.text-center > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Zobrazit všechny kurzy `section#problemove-chovani > div.container > div.text-center > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Zobrazit všechny kurzy `section#trenink-a-zabava > div.container > div.text-center > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Detail kurzu `div.carousel-item > div.course-card > div.part > a.btn`
Zobrazit všechny kurzy `section#psi-sporty > div.container > div.text-center > a.btn`
Koupit knihu `div.row > div.col-lg-5 > div.mt-40 > a.btn`
Získat e-book ZDARMA `form.w-100 > div.d-flex > div.w-100 > button.btn`
Zásady zpracování osobních údajů `div.d-flex > div.flex-shrink-1 > small.mt-15 > a.color-grey-2`
Zobrazit starší epizody `div.podcast > div.border-radius-24 > div.text-center > a.btn`
Láska na čtyřech tlapkách: První máj očima pejskařů `div.blog-posts > div.blog-post-preview > div.text > a.text-decoration-none`
Co když pes sežere hračku? `div.blog-posts > div.blog-post-preview > div.text > a.text-decoration-none`
Proč se pes točí před ulehnutím dokola? `div.blog-posts > div.blog-post-preview > div.text > a.text-decoration-none`
Co když pes sežere, co nemá? `div.blog-posts > div.blog-post-preview > div.text > a.text-decoration-none`
Zobrazit starší články `div.row > div.blog > div.text-center > a.btn`
Psichologie. Oceněný projekt tréninku psů bez klasických trestů přeroste Česko `div.carousel-wrapper > div.carousel-content > div.carousel-item > a.external-article`
Rozhovor s Tomášem Nushartem v pořadu Host Lucie Výborné `div.carousel-wrapper > div.carousel-content > div.carousel-item > a.external-article`
Přihlásit `div.position-relative > form.w-100 > div.d-flex > button.btn`
Zásady zpracování osobních údajů `div.left-main-flex > div.position-relative > small.mt-15 > a`
Escalate Ltd `div.row > div.d-block > small > a`
Ochrana osobních údajů `div.d-flex > div.d-flex > small > a`
Obchodní podmínky `div.d-flex > div.d-flex > small > a`
Nastavení `div#cookieConsentBanner > div.cookie-consent-container > div.cookie-consent-actions > button.btn`
Odmítnout vše `div#cookieConsentBanner > div.cookie-consent-container > div.cookie-consent-actions > button.btn`
Přijmout vše `div#cookieConsentBanner > div.cookie-consent-container > div.cookie-consent-actions > button.btn`

○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>`

●`[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

●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

●Links are distinguishable without relying on color.

●Links have a discernible name

●Touch targets have sufficient size and spacing.

●Document has a main landmark.

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Deprecated ARIA roles were not used

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○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

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

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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

○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

○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.

URL	Map URL
psichologie.cz/_framework/dotnet.native.80swe1zwdl.wasm
psichologie.cz/js/video.jvy4z9nl1h.js	psichologie.cz/js/video.js.map
psichologie.cz/js/site.blvc3njm1h.js	psichologie.cz/js/site.js.map
psichologie.cz/js/input.utgzzqkzyr.js	psichologie.cz/js/input.js.map
psichologie.cz/js/cookie-consent.ioqaqduiy7.js	psichologie.cz/js/cookie-consent.js.map
psichologie.cz/js/carousel.86ps4ni65l.js	psichologie.cz/js/carousel.js.map
psichologie.cz/_framework/dotnet.runtime.zbexyp8zrs.js	psichologie.cz/_framework/dotnet.runtime.js.map
d70shl7vidtft.cloudfront.net/ecmtr-2.4.2.js	d70shl7vidtft.cloudfront.net/sp.lite.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 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

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

100

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.

○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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`