Lighthouse Desktop

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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
st-ok.cdn-vk.ru/res/js/classic_kn88qqh3.js	16.9 KiB
st-ok.cdn-vk.ru/res/css/login_dmnsraol.css	182.1 KiB	144 ms
st-ok.cdn-vk.ru/res/css/ncore_bihfpicx.css	165.0 KiB	465 ms
st-ok.cdn-vk.ru/res/js/require-conf-74279e365aaf0d2087cac728fbcdd5a9.js	32.1 KiB
st-ok.cdn-vk.ru/res/js/require-2.1.11_kyyqpj4q.js	7.4 KiB
st-ok.cdn-vk.ru/res/react/bdui-component/bdui-component-latest-55R3652X.css	8.4 KiB
st-ok.cdn-vk.ru/res/js/tracerPlaceholder_chnrkzcc.js	8.1 KiB
st-ok.cdn-vk.ru/res/css/colors.dark_byb9hya0.css	1.8 KiB
st-ok.cdn-vk.ru/res/css/colors_gzct653y.css	1.4 KiB
st-ok.cdn-vk.ru/res/react/auth-login-popup/auth-login-popup-latest-UX2TWZDT.css	84.6 KiB
st-ok.cdn-vk.ru/res/react/auth-login_vkid-form-adapter_3f194bba.css	61.8 KiB
st-ok.cdn-vk.ru/res/react/toolbar-search/toolbar-search-latest-CZUV6X34.css	13.7 KiB
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system.web.css-11.6.0.css	41.6 KiB
/res/react/layer-close-button/layer-close-button-latest-E...	2.4 KiB
/res/react/layer-arrow-button/layer-arrow-button-latest-A...	2.4 KiB
st-ok.cdn-vk.ru/res/react/layer-loader/layer-loader-latest-D2DVISMI.css	2.6 KiB
st-ok.cdn-vk.ru/res/react/components_e52be599.css	42.6 KiB
st.okcdn.ru/static/css-hacks/2-0-69/overrides_ix05r5rk.css	6.6 KiB	334 ms
ok.ru/res/js/cdnFailover_4CP7LGRS.js	1.8 KiB

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
mc.yandex.ru/metrika/tag.js	3600.0 s	85.1 KiB
privacy-cs.mail.ru/static/sync-loader.js	600.0 s	21.9 KiB
ad.mail.ru/static/sync-loader.js?v=2	600.0 s	21.9 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
r3.mail.ru/k?fver=0.0&ok_id=&t=&bci=4668808804409235607&src=desktop	7200.0 s	428 B
mc.yandex.com/metrika/advert.gif?t=gdpr(14)ti(4)	3600.0 s	316 B
/sync_cookie_image_decide?cid=87663567&scid=8986df65-5063...	0.0 ms	242 B
/sync_cookie_image_decide_secondary?cid=87663567&scid=417...	0.0 ms	79 B

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
rs.mail.ru/d27912937.gif	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1
/pixel/AACw_gE8e77ChggBOkPUjA6q6PbmRF03LBcGPeQhhNnBnJRG-f...	http/1.1

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

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: 420 ms 567.1 KiB

URL	Transfer Size	Est Savings
st-ok.cdn-vk.ru/res/css/login_dmnsraol.css	181.8 KiB	179.5 KiB
st-ok.cdn-vk.ru/res/css/ncore_bihfpicx.css	164.7 KiB	160.1 KiB
st-ok.cdn-vk.ru/res/react/auth-login-popup/auth-login-popup-latest-UX2TWZDT.css	84.3 KiB	76.5 KiB
st-ok.cdn-vk.ru/res/react/auth-login_vkid-form-adapter_3f194bba.css	61.5 KiB	54.6 KiB
st-ok.cdn-vk.ru/res/react/components_e52be599.css	42.3 KiB	42.3 KiB
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system.web.css-11.6.0.css	41.2 KiB	41.2 KiB
st-ok.cdn-vk.ru/res/react/toolbar-search/toolbar-search-latest-CZUV6X34.css	13.3 KiB	12.9 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: 80 ms 1.6 MiB

URL	Transfer Size	Est Savings
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system-11.6.0-amd.js	469.3 KiB	320.1 KiB
st-ok.cdn-vk.ru/res/react/vendor/@vkontakte_vkui-7.1.3-amd.js	181.9 KiB	164.9 KiB
st-ok.cdn-vk.ru/res/react/components_d1182347.js	229.8 KiB	146.0 KiB
st-ok.cdn-vk.ru/res/react/vendor/react-router-7.11.0-amd.js	113.3 KiB	110.2 KiB
yastatic.net/partner-code-bundles/1304600/24ec1381af6bc52b.js	129.5 KiB	103.1 KiB
st-ok.cdn-vk.ru/res/react/auth-login_vkid-form-adapter_efe77212.js	154.2 KiB	82.6 KiB
www.googletagmanager.com/gtag/js?id=G-GEGXS3ELM6&cx=c&gtm=4e64f0	172.9 KiB	65.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-WFHQQ63	129.2 KiB	62.4 KiB
st-ok.cdn-vk.ru/res/js/jquery-1.8.3_65hpifcf.js	91.7 KiB	61.5 KiB
st-ok.cdn-vk.ru/res/react/vendor/framer-motion-12.23.25-amd.js	65.8 KiB	58.6 KiB
st-ok.cdn-vk.ru/res/react/vendor/@vkontakte_icons-2.169.0-amd.js	1.1 MiB	55.9 KiB
yandex.ru/ads/system/context.js	103.6 KiB	54.3 KiB
/res/react/auth-login-popup/auth-login-popup-latest-ANIKZ...	77.1 KiB	53.9 KiB
mc.yandex.ru/metrika/tag.js	84.5 KiB	49.0 KiB
st-ok.cdn-vk.ru/res/react/vendor/@ok_bdui-renderer-1.8.0-amd.js	59.9 KiB	47.9 KiB
st-ok.cdn-vk.ru/res/react/vendor/@vk-ecosystem_skvoznoy-odkl-1.4.2-amd.js	57.4 KiB	39.4 KiB
st-ok.cdn-vk.ru/res/react/vendors_96c0234e.js	82.9 KiB	37.2 KiB
st-ok.cdn-vk.ru/res/react/vendor/motion-dom-12.23.23-amd.js	37.8 KiB	32.3 KiB
st-ok.cdn-vk.ru/res/react/vendor/date-fns-4.1.0-amd.js	36.2 KiB	30.4 KiB
st-ok.cdn-vk.ru/res/react/bdui-component/bdui-component-latest-DJ7CNJBH-amd.js	42.5 KiB	30.1 KiB
st-ok.cdn-vk.ru/res/react/vendor/core-LSSVPFQD-amd.js	58.1 KiB	27.1 KiB
yastatic.net/partner-code-bundles/1304600/e32796170bd90254.js	31.8 KiB	25.1 KiB
st-ok.cdn-vk.ru/res/react/vendor/imask_esm-7.6.1-amd.js	28.2 KiB	22.9 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-ok.cdn-vk.ru/res/js/require-2.1.11_kyyqpj4q.js	1.0 s	959 ms	1.2 ms
Unattributable	518 ms	55 ms	0.0 ms
ok.ru/	284 ms	32 ms	13 ms
st-ok.cdn-vk.ru/res/js/FrameRateLogger_ntfq6pmy.js	254 ms	74 ms	0.2 ms
privacy-cs.mail.ru/static/sync-loader.js	164 ms	135 ms	3.4 ms
st-ok.cdn-vk.ru/res/react/vendor/@vkontakte_icons-2.169.0-amd.js	151 ms	0.6 ms	150 ms
yandex.ru/ads/system/context.js	137 ms	105 ms	14 ms
www.googletagmanager.com/gtag/js?id=G-GEGXS3ELM6&cx=c&gtm=4e64f0	119 ms	93 ms	24 ms
www.googletagmanager.com/gtm.js?id=GTM-WFHQQ63	108 ms	91 ms	15 ms
mc.yandex.ru/metrika/tag.js	92 ms	78 ms	10 ms
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system-11.6.0-amd.js	81 ms	0.5 ms	80 ms
st-ok.cdn-vk.ru/res/react/vendors_96c0234e.js	78 ms	56 ms	9.3 ms
www.google-analytics.com/analytics.js	67 ms	61 ms	2.0 ms
yastatic.net/partner-code-bundles/1304600/24ec1381af6bc52b.js	65 ms	39 ms	25 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	2.2 s
Other	808 ms
Script Parsing & Compilation	660 ms
Style & Layout	236 ms
Parse HTML & CSS	78 ms
Garbage Collection	43 ms
Rendering	28 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 with WebSocket cannot enter back/forward cache.	Pending browser support
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
Back/forward cache is disabled because WebSocket has been used.	Not 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 16.9 KiB

URL	Transfer Size	Est Savings
st-ok.cdn-vk.ru/res/react/auth-login-popup/auth-login-popup-latest-UX2TWZDT.css	84.6 KiB	9.6 KiB
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system.web.css-11.6.0.css	41.6 KiB	5.0 KiB
st-ok.cdn-vk.ru/res/react/toolbar-search/toolbar-search-latest-CZUV6X34.css	13.7 KiB	2.2 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
st-ok.cdn-vk.ru/res/react/vendor/@vkontakte_icons-2.169.0-amd.js	1.1 MiB
st-ok.cdn-vk.ru/res/react/vendor/@ok_common_design-system-11.6.0-amd.js	469.7 KiB
st-ok.cdn-vk.ru/res/react/components_d1182347.js	230.3 KiB
st-ok.cdn-vk.ru/res/css/nmain_postponed_bc78q6lz.css	223.3 KiB
st-ok.cdn-vk.ru/res/react/vendor/@vkontakte_vkui-7.1.3-amd.js	182.7 KiB
st-ok.cdn-vk.ru/res/css/login_dmnsraol.css	182.1 KiB
www.googletagmanager.com/gtag/js?id=G-GEGXS3ELM6&cx=c&gtm=4e64f0	173.2 KiB
st-ok.cdn-vk.ru/res/css/ncore_bihfpicx.css	165.0 KiB
st-ok.cdn-vk.ru/res/react/auth-login_vkid-form-adapter_efe77212.js	154.7 KiB
st-ok.cdn-vk.ru/res/css/nmain_full_gtp4mkll.css	151.1 KiB

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

●Forced reflow

●Improve image delivery

●LCP breakdown

●Optimize viewport for mobile

●Minify JavaScript

●User Timing marks and measures 7 user timings

●Avoid long main-thread tasks 12 long tasks found

●Image elements have explicit `width` and `height`

●Network Requests

●Network Round Trip Times 60 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 120 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○LCP request discovery

○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.

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
div.toolbar_search_search-wrapper > div.toolbar_search_container4 > label.toolbar_search_label > input.toolbar_search_input `div.toolbar_search_search-wrapper > div.toolbar_search_container4 > label.toolbar_search_label > input.toolbar_search_input`
Sign in `form > button.vkuiInternalTappable > span.vkuiButton__in > span.vkuiButton__content`

These are opportunities to improve the legibility of your content.

Names and labels

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body.h-mod > input#adaptive-nav-switcher `body.h-mod > input#adaptive-nav-switcher`

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.

○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

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

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

●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

●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

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○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.

○Image elements have `[alt]` attributes

○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.

○Identical links have the same purpose.

○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.	line 326, col 17

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-ok.cdn-vk.ru/res/react/vendor/mobx-4.15.7-amd.js	Uncaught Error: [mobx] There are multiple, different versions of MobX active. Make sure MobX is loaded only once or use `configure({ isolateGlobalState: true })`

●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

●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.

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
ok.ru/cookiepolicy	More information

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

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○Image elements have `[alt]` attributes