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
www.bt.cn/static/astro/images/home/banner-1/bt_video.gif	43200.0 s	2.7 MiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-3.png	43200.0 s	314.7 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-1.png	43200.0 s	274.3 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-2.png	43200.0 s	228.5 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-domain-overview.png	43200.0 s	167.7 KiB
www.bt.cn/static/astro/woff2/fa-solid-900.woff2	43200.0 s	111.0 KiB
www.bt.cn/static/astro/images/home/overview-tabs/tabs/website.png	43200.0 s	99.8 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-ssl-overview.png	43200.0 s	97.3 KiB
www.bt.cn/static/astro/images/wechat/wechat-all.png	43200.0 s	68.3 KiB
www.bt.cn/static/astro/images/trust/xiehui.png	43200.0 s	62.1 KiB
www.bt.cn/static/astro/js/utils-vendor.js?version=1776821593	43200.0 s	60.7 KiB
www.bt.cn/static/astro/images/trust/yanjiu.png	43200.0 s	60.5 KiB
www.bt.cn/static/astro/css/1111-1.css?version=1776821593	43200.0 s	53.6 KiB
scripts.clarity.ms/0.8.59/clarity.js	0.0 ms	26.1 KiB
www.bt.cn/static/astro/images/wechat/wechat-customer.png	43200.0 s	51.6 KiB
www.bt.cn/static/astro/js/vue-vendor.js?version=1776821593	43200.0 s	39.0 KiB
www.bt.cn/static/astro/images/home/overview-tabs/tabs-active.png	43200.0 s	36.2 KiB
www.bt.cn/static/astro/images/trust/fuli.png	43200.0 s	33.2 KiB
www.bt.cn/static/astro/images/trust/hunan.png	43200.0 s	30.5 KiB
www.bt.cn/static/astro/images/wechat/wechat-group.png	43200.0 s	14.0 KiB
www.bt.cn/static/astro/images/decoration/panel-pc.png	43200.0 s	12.5 KiB
aqyzmedia.yunaq.com/labels/label_sm_90020.png	86400.0 s	8.5 KiB
/static/astro/js/Layout.astro_astro_type_script_index_0_l...	43200.0 s	5.5 KiB
www.bt.cn/static/astro/css/index.css?version=1776821593	43200.0 s	3.2 KiB
www.bt.cn/static/astro/images/home/free-icon.png	43200.0 s	3.2 KiB
/static/astro/js/StoryCarousel.astro_astro_type_script_in...	43200.0 s	3.2 KiB
/static/astro/js/index.astro_astro_type_script_index_0_la...	43200.0 s	2.5 KiB
/static/astro/js/CustomerServiceTooltip.astro_astro_type_...	43200.0 s	957 B
/static/astro/js/Header.astro_astro_type_script_index_0_l...	43200.0 s	558 B
/static/astro/js/NotificationSlide.astro_astro_type_scrip...	43200.0 s	558 B
www.bt.cn/static/astro/js/__commonjsHelpers__.js?version=1776821593	43200.0 s	457 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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
www.bt.cn/static/astro/woff2/fa-solid-900.woff2	565 ms

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:49.357 source:map[column:7 line:423 type:source-location url:https://www.bt.cn/new/index.html 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:49.357 source:map[column:31 line:148 type:source-location url:https://www.bt.cn/new/index.html 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
宝塔面板视频 `div.story-track > div.story-slide > div.flex > img.home-banner-image-one`	www.bt.cn/static/astro/images/home/banner-1/bt_video.gif	2.7 MiB	2.7 MiB
证书管理 `div.story-track > div.story-slide > div.w-[1400px] > img.home-banner-images`	www.bt.cn/static/astro/images/home/banner-1/banner-bg-3.png	314.0 KiB	197.0 KiB
宝塔面板 `div.story-track > div.story-slide > div.flex > img.home-banner-images`	www.bt.cn/static/astro/images/home/banner-1/banner-bg-1.png	273.6 KiB	156.7 KiB
域名管理 `div.story-track > div.story-slide > div.w-[1400px] > img.absolute`	www.bt.cn/static/astro/images/home/banner-1/banner-domain-overview.png	167.2 KiB	138.5 KiB
域名管理 `div.story-track > div.story-slide > div.w-[1400px] > img.home-banner-images`	www.bt.cn/static/astro/images/home/banner-1/banner-bg-2.png	227.9 KiB	111.0 KiB
证书管理 `div.story-track > div.story-slide > div.w-[1400px] > img.absolute`	www.bt.cn/static/astro/images/home/banner-1/banner-ssl-overview.png	96.9 KiB	77.9 KiB
协会 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/xiehui.png	61.7 KiB	60.6 KiB
研究院 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/yanjiu.png	60.1 KiB	58.8 KiB
微信客服二维码 `div.footer-qrcode > div.footer-qrcode-box > div#footer-customer-btn > img.footer-qr-thumbnail`	www.bt.cn/static/astro/images/wechat/wechat-customer.png	51.2 KiB	49.4 KiB
富力 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/fuli.png	32.8 KiB	31.3 KiB
湖南 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/hunan.png	30.2 KiB	29.0 KiB
快速创建并管理你的网站 `div.overview-container > div#overview-gallery > div.gallery-img > img.gallery-img__img`	www.bt.cn/static/astro/images/home/overview-tabs/tabs/website.png	99.4 KiB	28.3 KiB
快速创建/管理网站 `div.mb-4 > div.mobile-tabs-wrapper > ul.mobile-tabs-list > li.mobile-tab-item`	www.bt.cn/static/astro/images/home/overview-tabs/tabs-active.png	35.8 KiB	24.5 KiB
宝塔交流群二维码 `div.footer-qrcode > div.footer-qrcode-box > div#footer-group-btn > img.footer-qr-thumbnail`	www.bt.cn/static/astro/images/wechat/wechat-group.png	13.7 KiB	13.1 KiB
宝塔面板 `div.story-track > div.story-slide > div.flex > img.home-banner-image-two`	www.bt.cn/static/astro/images/decoration/panel-pc.png	12.1 KiB	7.8 KiB
div.footer-bottom > div.footer-bottom-links > a.footer-bottom-link > img.inline-block `div.footer-bottom > div.footer-bottom-links > a.footer-bottom-link > img.inline-block`	aqyzmedia.yunaq.com/labels/label_sm_90020.png	7.9 KiB	7.5 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:1963.4519990234376 label:Time to first byte subpart:timeToFirstByte] map[duration:15.8670009765625 label:Resource load delay subpart:resourceLoadDelay] map[duration:1090.417 label:Resource load duration subpart:resourceLoadDuration] map[duration:41.609 label:Element render delay subpart:elementRenderDelay]]

lhId: page-16-IMG

nodeLabel: 宝塔面板

path: 1,HTML,1,BODY,2,MAIN,0,STORY-CAROUSEL,1,DIV,1,DIV,1,DIV,0,IMG

selector: div.story-track > div.story-slide > div.flex > img.home-banner-images

snippet: <img src="/static/astro/images/home/banner-1/banner-bg-1.png" alt="宝塔面板" loading="eager" decoding="async" fetchpriority="auto" width="1440" height="600" class="home-banner-images">

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-16-IMG

nodeLabel: 宝塔面板

path: 1,HTML,1,BODY,2,MAIN,0,STORY-CAROUSEL,1,DIV,1,DIV,1,DIV,0,IMG

selector: div.story-track > div.story-slide > div.flex > img.home-banner-images

snippet: <img src="/static/astro/images/home/banner-1/banner-bg-1.png" alt="宝塔面板" loading="eager" decoding="async" fetchpriority="auto" width="1440" height="600" class="home-banner-images">

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

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
www.bt.cn/static/astro/css/1111-1.css?version=1776821593	53.6 KiB	315 ms
www.bt.cn/static/astro/css/index.css?version=1776821593	3.2 KiB

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

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: 3.1 s

URL	Time Spent
bt.cn/	1.5 s
www.bt.cn/	1.6 s
www.bt.cn/new/index.html	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

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: 350 ms 45.5 KiB

URL	Transfer Size	Est Savings
www.bt.cn/static/astro/css/1111-1.css?version=1776821593	53.3 KiB	45.5 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	1.3 s
Rendering	1.1 s
Style & Layout	1.0 s
Script Evaluation	518 ms
Parse HTML & CSS	38 ms
Script Parsing & Compilation	26 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

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 76.9 KiB

URL	Transfer Size	Est Savings
www.bt.cn/static/astro/js/utils-vendor.js?version=1776821593	59.9 KiB	41.5 KiB
www.bt.cn/static/astro/js/vue-vendor.js?version=1776821593	38.6 KiB	35.4 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
www.bt.cn/static/astro/images/home/banner-1/bt_video.gif	2.7 MiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-3.png	314.7 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-1.png	274.3 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-bg-2.png	228.5 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-domain-overview.png	167.7 KiB
www.bt.cn/static/astro/woff2/fa-solid-900.woff2	111.0 KiB
www.bt.cn/static/astro/images/home/overview-tabs/tabs/website.png	99.8 KiB
www.bt.cn/static/astro/images/home/banner-1/banner-ssl-overview.png	97.3 KiB
www.bt.cn/static/astro/images/wechat/wechat-all.png	68.3 KiB
www.bt.cn/static/astro/images/trust/xiehui.png	62.1 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
研究院 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/yanjiu.png
研究院 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/yanjiu.png
湖南 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/hunan.png
湖南 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/hunan.png
富力 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/fuli.png
富力 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/fuli.png
协会 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/xiehui.png
协会 `div#viewport > div#track > div.card > img.!max-w-[80%]`	www.bt.cn/static/astro/images/trust/xiehui.png
执行安装命令 `ol.flex > li.h-[330px] > div.w-full > img.w-auto`	www.bt.cn/static/astro/images/home/step/command.svg
访问面板 `ol.flex > li.h-[330px] > div.w-full > img.w-auto`	www.bt.cn/static/astro/images/home/step/panel.svg
通过SSH连接服务器 `ol.flex > li.h-[330px] > div.w-full > img.w-auto`	www.bt.cn/static/astro/images/home/step/download.svg
div.flex > div.flex > h1.xl:text-[56px] > img.ml-4 `div.flex > div.flex > h1.xl:text-[56px] > img.ml-4`	www.bt.cn/static/astro/images/home/free-icon.png
div.flex > div.flex > h1.xl:text-[56px] > img.ml-4 `div.flex > div.flex > h1.xl:text-[56px] > img.ml-4`	www.bt.cn/static/astro/images/home/free-icon.png

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

●Layout shift culprits

●Optimize DOM size

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●JavaScript execution time 0.5 s

●Avoid long main-thread tasks 3 long tasks found

●Avoid non-composited animations 9 animated elements found

●Network Requests

●Network Round Trip Times 250 ms

●Server Backend Latencies 280 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 510 ms

●Avoid large layout shifts 10 layout shifts found

○INP breakdown

○User Timing marks and measures

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.

ARIA

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
SSL证书安全防护为您的网站保驾护航提供多品牌SSL证书服务，支持多种验证级别，为网站数据传输提供安全保护查看SSL产品立即咨询 `main.body-main > story-carousel#story-carousel-a94vs43 > div.story-track > div.story-slide`
宝塔，安全高效的服务器运维面板全球超2000万台服务器安装宝塔，近300万注册用户使用宝塔，持续更新维护9年值得信赖立即免费安装宝塔面板运维服务 `main.body-main > story-carousel#story-carousel-a94vs43 > div.story-track > div.story-slide`

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

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
body.overflow-x-hidden > div#floating-actions > div.inline-block > button#floating-qr-service `body.overflow-x-hidden > div#floating-actions > div.inline-block > button#floating-qr-service`

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.flex > div.flex > h1.xl:text-[56px] > img.ml-4 `div.flex > div.flex > h1.xl:text-[56px] > img.ml-4`

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.footer-container > div.footer-bottom > div.footer-bottom-links > a.footer-bottom-link `div.footer-container > div.footer-bottom > div.footer-bottom-links > a.footer-bottom-link`

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
全球超2000万台服务器安装宝塔，近300万注册用户使用宝塔，持续更新维护9年值得信赖 `div.home-banner-header > div.flex > div.flex > div.lg:text-[18px]`
运维服务 `div.home-banner-header > div.banner-btn-group > a#home-service-btn > div.mobile-title`
简单高效的服务器运维面板，让服务器管理更轻松，查看更多功能 »» `main.body-main > div.pt-[40px] > div.gap-[10px] > div.md:text-[18px]`
查看更多功能 »» `div.pt-[40px] > div.gap-[10px] > div.md:text-[18px] > a.text-bt`
多种不同品牌的(HTTPS)SSL证书快速接入，保障您网站安全，提升用户信任度 `div.mx-auto > section.w-full > a.p-10 > p.mt-2`
宝塔团队拥有10余年服务器运维行业经验，为您的业务保驾护航 `div.mx-auto > section.w-full > a.p-10 > p.mt-2`
提供价格实惠的域名注册服务，价格透明，无需隐藏费用，一键快速注册 `div.mx-auto > section.w-full > a.p-10 > p.mt-2`
万+ `ul.w-full > li.flex > div.text-bt > span.ml-1`
海量用户关注，信赖倍增 `ul.w-full > li.flex > div.flex > span.text-[#787a79]`
于中央大型政企广泛使用 `ul.w-full > li.flex > div.flex > span.text-[#787a79]`
万+ `ul.w-full > li.flex > div.text-bt > span.ml-1`
超过220万注册用户 `ul.w-full > li.flex > div.flex > span.text-[#787a79]`
支持一键 LAMP/LNMP/集群/监控/网站/FTP/数据库/JAVA 等 100+ 服务器管理能力 `main.body-main > div.pt-[40px] > div.gap-[10px] > div.md:text-[18px]`
使用堡塔 SSH 终端快速连接服务器，免去复杂密钥配置，保障连接安全与效率。 `div.mx-auto > ol.flex > li.h-[330px] > p.mt-2`
复制下方安装命令，在 SSH 终端中执行，快速开始安装面板。 `div.mx-auto > ol.flex > li.h-[330px] > p.mt-2`
安装完成后，按照提示访问链接并使用初始账号密码登录，开始管理服务器。 `div.mx-auto > ol.flex > li.h-[330px] > p.mt-2`
首次登录根据业务需要一键安装网站环境配置。 `div.mx-auto > ol.flex > li.h-[330px] > p.mt-2`
更多安装方式 `div.pt-[40px] > div.mx-auto > section.flex > a.btn`
立即安装 `div#openclaw-notification > div.notification-card > div.relative > a.flex`

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
查看更多功能 »» `div.pt-[40px] > div.gap-[10px] > div.md:text-[18px] > a.text-bt`

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
域名注册服务 `div.story-track > div.story-slide > div.max-w-[1400px] > h3.mb-4`

These are opportunities to improve keyboard navigation in your application.

○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

●`[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

●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.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

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

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○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

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.	hm.baidu.com/hm.js?6e78ef648057d9f2ab12dcc287b440f6 line 1, col 274

●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 browser errors logged to the console

●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

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

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 may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
产品与服务 `nav.nav-main > ol.nav-items > li.nav-item-dropdown > a.nav-link`
推广与入驻 `nav.nav-main > ol.nav-items > li.nav-item-dropdown > a.nav-link`
运维服务 `div.story-slide > div.home-banner-header > div.banner-btn-group > a#home-service-btn`
运维服务 `div.story-slide > div.home-banner-header > div.banner-btn-group > a.flex-col`

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

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.flex > div.flex > h1.xl:text-[56px] > img.ml-4 `div.flex > div.flex > h1.xl:text-[56px] > img.ml-4`

hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about `hreflang`.

Why this matters

Performance issues directly impact user engagement and conversion rates.


`head > link`

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

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

Source: MDN Permissions-Policy

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 have descriptive text

●robots.txt is valid