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
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js	345600.0 s	838.0 KiB
st.vk.com/dist/web/chunks/common.c83b22c9.js	345600.0 s	428.3 KiB
st.vk.com/dist/web/chunks/vkcom-kit.9c3de3eb.js	345600.0 s	249.4 KiB
st.vk.com/dist/web/chunks/vkui.e301c498.js	345600.0 s	110.8 KiB
vk.com/js/loader_nav21497680114_3.js	345600.0 s	97.7 KiB
st.vk.com/dist/web/chunks/vkcom-kit-icons.e2f47124.js	345600.0 s	91.4 KiB
st.vk.com/dist/web/chunks/vkcom-kit.d933359f.css	345600.0 s	81.8 KiB
st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js	345600.0 s	67.5 KiB
st.vk.com/dist/web/chunks/b0cab1c1.async.a239f8e4.js	345600.0 s	66.2 KiB
vk.me/css/al/common.837ea214.css	345600.0 s	56.1 KiB
st.vk.com/dist/web/chunks/react.bd51212f.js	345600.0 s	54.2 KiB
st.vk.com/dist/web/chunks/audio_config_legacy.44bd28ae.js	345600.0 s	53.5 KiB
vk.com/js/lang3_0.js	345600.0 s	53.5 KiB
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	345600.0 s	49.6 KiB
vk.me/css/al/vkui.ad50b2ae.css	345600.0 s	47.6 KiB
st.vk.com/dist/web/chunks/audio_config_overrides.a993f368.js	345600.0 s	39.0 KiB
st.vk.com/dist/web/chunks/f70c08bb.async.8ae8dfe7.js	345600.0 s	38.0 KiB
st.vk.com/dist/web/chunks/common.evergreen.5045dff3.js	345600.0 s	29.5 KiB
st.vk.com/dist/web/chunks/31025993.async.78016bc8.js	345600.0 s	29.0 KiB
st.vk.com/dist/web/common_web.3607fba0.js	345600.0 s	27.5 KiB
st.vk.com/dist/core_spa/core_spa_vk.57662b0c.css	345600.0 s	26.1 KiB
st.vk.com/dist/web/chunks/state-management.c8525527.js	345600.0 s	24.3 KiB
vk.me/images/landings/vkme/screens/ru/android_calls_2x.webp	604800.0 s	41.8 KiB
st.vk.com/css/landings/landings_vkme.57b962a5.css	345600.0 s	23.7 KiB
st.vk.com/dist/web/chunks/958d42b8.async.81af3a75.js	345600.0 s	23.5 KiB
st.vk.com/dist/web/chunks/97d9b16d.async.c62e15d4.js	345600.0 s	22.5 KiB
st.vk.com/dist/web/chunks/architecture-mobx.b327c653.js	345600.0 s	21.0 KiB
st.vk.com/dist/web/chunks/c87a1172.async.bb88dc5e.js	345600.0 s	20.4 KiB
st.vk.com/dist/web/chunks/3b67094a.async.1ef14c73.js	345600.0 s	20.0 KiB
vk.me/images/landings/vkme/screens/ru/ios_chat_2x.webp	604800.0 s	34.1 KiB
vk.me/images/landings/vkme/screens/ru/android_chat_2x.webp	604800.0 s	32.1 KiB
st.vk.com/fonts/VKSansDisplayBold.woff2	345600.0 s	18.3 KiB
st.vk.com/fonts/VK_Sans_Display_Regular.woff2	345600.0 s	18.0 KiB
vk.me/images/landings/vkme/screens/ru/ios_chat_s_2x.webp	604800.0 s	30.2 KiB
st.vk.com/dist/web/chunks/75f64ad0.async.caa5e143.js	345600.0 s	11.9 KiB
st.vk.com/dist/web/chunks/9b1ce1a1.async.365a14a8.js	345600.0 s	11.8 KiB
st.vk.com/dist/web/chunks/1e98d177.async.4cb7196e.js	345600.0 s	11.7 KiB
st.vk.com/dist/web/chunks/55f510ae.async.5800c87f.js	345600.0 s	11.4 KiB
st.vk.com/dist/web/chunks/70a0dd12.async.99c8f4d0.js	345600.0 s	11.0 KiB
st.vk.com/dist/web/chunks/2cdae121.async.b7dd3cca.js	345600.0 s	9.8 KiB
st.vk.com/dist/web/chunks/38e27adb.async.d2ea7031.js	345600.0 s	9.2 KiB
st.vk.com/dist/web/chunks/f940ca6a.async.59f980af.js	345600.0 s	8.8 KiB
st.vk.com/dist/web/chunks/749b661c.async.42512d65.js	345600.0 s	8.6 KiB
st.vk.com/dist/web/chunks/b59e2128.async.01c7a95a.js	345600.0 s	8.3 KiB
st.vk.com/dist/web/chunks/stickers-popup-tq-handlers.14dd1b6c.js	345600.0 s	8.2 KiB
vk.me/js/langs/web/audio_config_legacy.1f752bec3a6a9232.js?v=1&p=web&l=3	345600.0 s	7.8 KiB
vk.me/css/al/base.8c3900ec.css	345600.0 s	7.7 KiB
st.vk.com/dist/web/chunks/0a5b4d72.async.dab9a968.js	345600.0 s	6.7 KiB
st.vk.com/dist/web/chunks/30a25b92.async.0d9a1d81.js	345600.0 s	6.4 KiB
vk.me/dist/web/chunks/rlottie.bd13dce8.js	345600.0 s	6.0 KiB
st.vk.com/dist/web/chunks/audioPageDomain.6b673b46.js	345600.0 s	5.8 KiB
vk.me/js/langs/web/audio_config_overrides.9c4a68ed57acf398.js?v=1&p=web&l=3	345600.0 s	4.4 KiB
st.vk.com/dist/web/chunks/audio_web_globalPlayerImpl.3b1a3e32.js	345600.0 s	4.2 KiB
st.vk.com/dist/web/chunks/audio_onMediaAttachmentPlayer.94e334a8.js	345600.0 s	3.8 KiB
st.vk.com/dist/web/chunks/audio_postingPlayer.1b1ebc31.js	345600.0 s	3.7 KiB
st.vk.com/dist/web/chunks/AudioEventNotifier.fd38c61b.js	345600.0 s	2.8 KiB
st.vk.com/dist/web/vkme-desktop.74f5267d.js	345600.0 s	2.5 KiB
vk.me/js/langs/web/audio_web_globalPlayerImpl.ff4bec0f8da66f36.js?v=1&p=web&l=3	345600.0 s	2.4 KiB
st.vk.com/css/al/vkme.bbcf8291.css	345600.0 s	2.2 KiB
/dist/web/chunks/audio_config_audioAdvertisingBannerViewM...	345600.0 s	1.9 KiB
vk.me/css/al/fonts_utf.7fa94ada.css	345600.0 s	1.5 KiB
st.vk.com/dist/web/chunks/audioplayer-lib.85ff28d7.css	345600.0 s	1.4 KiB
st.vk.com/css/landings/common.c04c9fc0.css	345600.0 s	1.3 KiB
vk.me/js/langs/web/AudioEventNotifier.b82c8ec8afb32860.js?v=1&p=web&l=3	345600.0 s	1.1 KiB
st.vk.com/dist/web/chunks/initIdleTabStats.f53afe70.js	345600.0 s	1.1 KiB
st.vk.com/dist/web/chunks/web_audio_AnyAudioLegacyService.0ed842af.js	345600.0 s	1.1 KiB
st.vk.com/js/landings/landings_vkme.js?1	345600.0 s	1.1 KiB
vk.me/js/langs/web/stickers-popup-tq-handlers.797ae8774f3e2305.js?v=1&p=web&l=3	345600.0 s	972 B
st.vk.com/dist/web/common_web.917adb2f.css	345600.0 s	967 B
st.vk.com/dist/web/chunks/02493f4e.css	345600.0 s	905 B
st.vk.com/dist/web/chunks/8f1c88a8.css	345600.0 s	796 B
vk.me/dist/web/chunks/79ccc352.css	345600.0 s	646 B
vk.me/js/lang3_2.js?29614929	604800.0 s	1.0 KiB
vk.me/css/al/fonts_cnt_async.4881739c.css	345600.0 s	598 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.

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:320.6130009765625 label:Time to first byte subpart:timeToFirstByte] map[duration:3194.0449990234374 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-DIV

nodeLabel: figure.figure > div.figure__in > div.picture > div.picture__android

path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV,1,FIGURE,0,DIV,1,DIV,0,DIV

selector: figure.figure > div.figure__in > div.picture > div.picture__android

snippet: <div class="picture__android">

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

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

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
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js	838.0 KiB	4.2 s
st.vk.com/dist/web/chunks/common.c83b22c9.js	428.3 KiB	2.2 s
st.vk.com/dist/web/chunks/vkcom-kit.9c3de3eb.js	249.4 KiB	1.3 s
st.vk.com/dist/web/chunks/common.evergreen.5045dff3.js	29.5 KiB	157 ms
st.vk.com/dist/web/common_web.3607fba0.js	27.5 KiB	157 ms
st.vk.com/dist/web/chunks/vkui.e301c498.js	110.8 KiB	628 ms
st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js	67.5 KiB	314 ms
st.vk.com/dist/web/vkme-desktop.74f5267d.js	2.5 KiB
st.vk.com/js/landings/landings_vkme.js?1	1.1 KiB
st.vk.com/dist/web/chunks/architecture-mobx.b327c653.js	21.0 KiB	157 ms
st.vk.com/dist/web/chunks/state-management.c8525527.js	24.3 KiB
st.vk.com/dist/web/chunks/react.bd51212f.js	54.2 KiB	314 ms
st.vk.com/dist/web/chunks/vkcom-kit-icons.e2f47124.js	91.4 KiB	471 ms
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	49.6 KiB	628 ms
vk.com/js/lang3_0.js	53.5 KiB	625 ms
vk.com/js/loader_nav21497680114_3.js	97.7 KiB	2.6 s
st.vk.com/dist/web/chunks/vkcom-kit.d933359f.css	81.8 KiB	1.3 s
st.vk.com/css/landings/landings_vkme.57b962a5.css	23.7 KiB	314 ms
st.vk.com/css/al/vkme.bbcf8291.css	2.2 KiB
st.vk.com/dist/web/common_web.917adb2f.css	967 B
st.vk.com/css/landings/common.c04c9fc0.css	1.3 KiB
st.vk.com/dist/web/chunks/audioplayer-lib.85ff28d7.css	1.4 KiB
st.vk.com/dist/core_spa/core_spa_vk.57662b0c.css	26.1 KiB	1.2 s
vk.me/css/al/vkui.ad50b2ae.css	47.6 KiB	770 ms
vk.me/js/lang3_2.js?29614929	1.0 KiB	154 ms
vk.me/css/al/fonts_cnt_async.4881739c.css	598 B
vk.me/css/al/fonts_utf.7fa94ada.css	1.5 KiB
vk.me/css/al/common.837ea214.css	56.1 KiB	925 ms
vk.me/css/al/base.8c3900ec.css	7.7 KiB	154 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.picture > div.picture__android > picture > img.screen `div.picture > div.picture__android > picture > img.screen`	vk.me/images/landings/vkme/screens/ru/android_chat_2x.webp	31.7 KiB	23.7 KiB

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

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.

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: 927 ms

URL	Time Spent
vk.me/	927 ms
vk.me/app	0.0 ms

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 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: 1.0 s 225.1 KiB

URL	Transfer Size	Est Savings
st.vk.com/dist/web/chunks/vkcom-kit.d933359f.css	81.3 KiB	81.1 KiB
vk.me/css/al/common.837ea214.css	55.6 KiB	55.4 KiB
vk.me/css/al/vkui.ad50b2ae.css	47.1 KiB	41.0 KiB
st.vk.com/dist/core_spa/core_spa_vk.57662b0c.css	25.6 KiB	25.6 KiB
st.vk.com/css/landings/landings_vkme.57b962a5.css	23.2 KiB	22.1 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: 8.7 s 1.6 MiB

URL	Transfer Size	Est Savings
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js	835.9 KiB	595.8 KiB
st.vk.com/dist/web/chunks/common.c83b22c9.js	426.1 KiB	267.6 KiB
st.vk.com/dist/web/chunks/vkcom-kit.9c3de3eb.js	248.9 KiB	234.6 KiB
st.vk.com/dist/web/chunks/vkcom-kit-icons.e2f47124.js	90.9 KiB	89.3 KiB
st.vk.com/dist/web/chunks/vkui.e301c498.js	109.9 KiB	85.2 KiB
st.vk.com/dist/web/chunks/b0cab1c1.async.a239f8e4.js	65.7 KiB	57.7 KiB
st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js	67.1 KiB	54.2 KiB
st.vk.com/dist/web/chunks/audio_config_legacy.44bd28ae.js	53.0 KiB	50.1 KiB
st.vk.com/dist/web/chunks/react.bd51212f.js	53.7 KiB	48.2 KiB
st.vk.com/dist/web/chunks/f70c08bb.async.8ae8dfe7.js	37.5 KiB	37.1 KiB
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	49.1 KiB	34.0 KiB
st.vk.com/dist/web/chunks/audio_config_overrides.a993f368.js	38.6 KiB	28.0 KiB
st.vk.com/dist/web/chunks/31025993.async.78016bc8.js	28.5 KiB	27.7 KiB
st.vk.com/dist/web/chunks/common.evergreen.5045dff3.js	29.0 KiB	27.1 KiB
st.vk.com/dist/web/chunks/958d42b8.async.81af3a75.js	23.0 KiB	22.8 KiB
st.vk.com/dist/web/chunks/97d9b16d.async.c62e15d4.js	22.0 KiB	21.8 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
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js	1.2 s	827 ms	285 ms
st.vk.com/dist/web/common_web.3607fba0.js	887 ms	856 ms	6.6 ms
Unattributable	356 ms	8.6 ms	0.0 ms
vk.me/app	240 ms	35 ms	15 ms
st.vk.com/dist/web/chunks/common.c83b22c9.js	167 ms	5.4 ms	159 ms
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	104 ms	82 ms	12 ms
st.vk.com/dist/web/chunks/vkcom-kit.9c3de3eb.js	98 ms	2.8 ms	94 ms
st.vk.com/dist/web/chunks/audio_config_legacy.44bd28ae.js	91 ms	75 ms	16 ms
vk.me/js/langs/web/AudioEventNotifier.b82c8ec8afb32860.js?v=1&p=web&l=3	88 ms	82 ms	0.3 ms
st.vk.com/dist/web/chunks/audio_config_overrides.a993f368.js	72 ms	57 ms	15 ms
st.vk.com/dist/web/chunks/f70c08bb.async.8ae8dfe7.js	50 ms	35 ms	15 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	2.3 s
Script Parsing & Compilation	945 ms
Other	427 ms
Style & Layout	184 ms
Parse HTML & CSS	84 ms
Garbage Collection	24 ms
Rendering	13 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
The page has an unload handler in the main frame.	Actionable
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not 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
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js	838.0 KiB
st.vk.com/dist/web/chunks/common.c83b22c9.js	428.3 KiB
st.vk.com/dist/web/chunks/vkcom-kit.9c3de3eb.js	249.4 KiB
st.vk.com/dist/web/chunks/vkui.e301c498.js	110.8 KiB
vk.com/js/loader_nav21497680114_3.js	97.7 KiB
st.vk.com/dist/web/chunks/vkcom-kit-icons.e2f47124.js	91.4 KiB
st.vk.com/dist/web/chunks/vkcom-kit.d933359f.css	81.8 KiB
st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js	67.5 KiB
st.vk.com/dist/web/chunks/b0cab1c1.async.a239f8e4.js	66.2 KiB
vk.me/css/al/common.837ea214.css	56.1 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
body.is_page > div.landing > img `body.is_page > div.landing > img`	vk.com/al_im.php?act=vkme_landing&ref=

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

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoid long main-thread tasks 7 long tasks found

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 70 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 140 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

○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.

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
© 2026 VK Social Network Team `div.landing > footer.footer > div.footer__in > small.copyright`
VK Social Network Team `footer.footer > div.footer__in > small.copyright > a.copyright__link`

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
Available on `main.content > div.content__in > footer.beta-links-wrapper > h3.beta-links-wrapper__heading`

These are opportunities to improve keyboard navigation in your application.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta `head > meta`

These items highlight common accessibility best practices.

○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

●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 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

●Touch targets have sufficient size and spacing.

●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-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

○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

○Buttons have an accessible name

○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

○Form elements have associated labels

○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.

○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

○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

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Unload event listeners are deprecated and will be removed.	st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js

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
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	Error: MediaFocusChannel id audio already registered at d.createChannel (https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:1292647) at new Be (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:113321) at r (https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:73853) at d.init (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:208597) at new d (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:208257) at https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:208150 at s (https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:1389659) at <static_initializer> (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:208085) at 262549 (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:208025) at __webpack_require__ (https://st.vk.com/dist/web/common_web.3607fba0.js:1:56144) at 452309 (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:212661) at __webpack_require__ (https://st.vk.com/dist/web/common_web.3607fba0.js:1:56144) at async a.lazyCreateImpl (https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:872359) at async https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:471264
vk.me/usefull.php	`Failed to load resource: the server responded with a status of 403 ()`
st.vk.com/dist/core_spa/error_monitoring.isolated.a9c04e6f.js	ReferenceError: ls is not defined at h.isDebug (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:35067) at new Y (https://st.vk.com/dist/web/chunks/common.c83b22c9.js:2:395927) at new Be (https://st.vk.com/dist/web/chunks/audioplayer-lib.47d399cf.js:1:115053) at o (https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:238671) at https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:960386 at xt (https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:2820011) at https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:2802904 at d (https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:2797667) at r.create (https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:2799213) at Object.r [as init] (https://st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js:2:2799105) at be (https://st.vk.com/dist/web/common_web.3607fba0.js:1:15954) at 692725 (https://st.vk.com/dist/web/common_web.3607fba0.js:1:48417) at __webpack_require__ (https://st.vk.com/dist/web/common_web.3607fba0.js:1:56144) at https://st.vk.com/dist/web/common_web.3607fba0.js:1:85252 at __webpack_require__.O (https://st.vk.com/dist/web/common_web.3607fba0.js:1:56516) at https://st.vk.com/dist/web/common_web.3607fba0.js:1:85304 at https://st.vk.com/dist/web/common_web.3607fba0.js:1:85310
vk.me/app line 145, col 60	`TypeError: Cannot read properties of null (reading '0') at https://vk.me/app:146:61`
st.vk.com/dist/web/chunks/common.c83b22c9.js line 1, col 1292646	`Uncaught (in promise) Error: MediaFocusChannel id audio already registered`
st.vk.com/dist/web/chunks/b59e2128.async.01c7a95a.js	`Uncaught (in promise) Error: MediaFocusChannel id audio already registered`
st.vk.com/dist/core_spa/core_spa_vk.cd6c2341.js line 1, col 2955886	`Uncaught (in promise) TypeError: Cannot read properties of null (reading '0')`

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

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

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○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

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

●Page isn’t blocked from indexing

●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`

○robots.txt is valid

○Document has a valid `rel=canonical`