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

Audit breakdown by category with detailed findings.

63

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.

RequestCache TTLTransfer Size
51.la/image/solution-bg.png0.0 ms1.7 MiB
51.la/image/solution-6.png0.0 ms750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png0.0 ms689.7 KiB
51.la/image/community-3-chatu.png0.0 ms678.0 KiB
51.la/image/solution-5.png0.0 ms598.8 KiB
51.la/image/solution-1.png0.0 ms547.2 KiB
51.la/gif/banner-safe-CdaMFx94.gif0.0 ms496.5 KiB
51.la/gif/banner-v6-DJZ15IgC.gif0.0 ms433.9 KiB
51.la/js/index-8kzxuVEg.js0.0 ms387.4 KiB
51.la/image/zhuce-left.png0.0 ms345.5 KiB
51.la/image/solution-7.png0.0 ms339.0 KiB
51.la/gif/banner-perf-CpuidH0T.gif0.0 ms322.6 KiB
51.la/image/solution-4.png0.0 ms309.3 KiB
51.la/gif/banner-app-CKOi1sY_.gif0.0 ms306.6 KiB
51.la/image/production-yunran.png0.0 ms305.6 KiB
51.la/image/zhuce-right.png0.0 ms300.7 KiB
51.la/image/community-2-chatu.png0.0 ms271.9 KiB
51.la/image/community-2-yunran.png0.0 ms263.8 KiB
51.la/image/solution-2.png0.0 ms256.1 KiB
51.la/image/community-1-chatu.png0.0 ms219.3 KiB
51.la/gif/banner-record-CFc8_6oW.gif0.0 ms205.2 KiB
51.la/image/solution-yunran.png0.0 ms202.1 KiB
51.la/image/solution-8.png0.0 ms199.5 KiB
51.la/image/fuwu-yunran.png0.0 ms179.9 KiB
51.la/image/solution-3.png0.0 ms147.5 KiB
51.la/image/solution-9.png0.0 ms147.1 KiB
51.la/image/fuwu-bottom-left-bg.png0.0 ms146.3 KiB
51.la/image/community-1-yunran.png0.0 ms104.0 KiB
51.la/image/site-group-bg.png0.0 ms96.9 KiB
51.la/image/ad-more-bg.png0.0 ms92.8 KiB
cdnstdbs.51.la/static-advertisement/20260417172638-20260417-172542.gif0.0 ms79.9 KiB
51.la/image/evaluate-bg-2.png0.0 ms62.1 KiB
51.la/image/evaluate-bg-1.png0.0 ms58.1 KiB
51.la/css/index-CfDB1C6o.css0.0 ms53.2 KiB
51.la/image/evaluate-icon-3.png0.0 ms52.6 KiB
51.la/image/evaluate-icon-2.png0.0 ms45.3 KiB
51.la/image/evaluate-icon-1.png0.0 ms43.3 KiB
51.la/image/evaluate-bg-3.png0.0 ms37.1 KiB
51.la/png/wechat-BpCdW-3I.png0.0 ms23.4 KiB
51.la/image/wechat.png0.0 ms23.4 KiB
51.la/image/evaluate-name-2.png0.0 ms21.2 KiB
51.la/image/site/site_012.png0.0 ms20.6 KiB
51.la/image/site/site_009.png0.0 ms19.0 KiB
51.la/image/evaluate-name-1.png0.0 ms18.3 KiB
51.la/image/site/site_014.png0.0 ms18.0 KiB
51.la/image/site/site_013.png0.0 ms17.6 KiB
51.la/image/evaluate-name-3.png0.0 ms17.4 KiB
51.la/image/ad-tiao.png0.0 ms16.6 KiB
51.la/image/site/site_015.png0.0 ms16.0 KiB
51.la/image/site/site_017.png0.0 ms15.9 KiB
51.la/image/site/site_002.png0.0 ms15.1 KiB
51.la/image/site/site_010.png0.0 ms14.1 KiB
51.la/image/site/site_003.png0.0 ms13.2 KiB
51.la/image/production-1.png0.0 ms12.6 KiB
51.la/image/site/site_018.png0.0 ms11.7 KiB
51.la/js/Home-CKY2M37V.js0.0 ms11.2 KiB
51.la/image/site/site_011.png0.0 ms10.8 KiB
51.la/image/site/site_016.png0.0 ms10.7 KiB
51.la/image/fuwu-left-bg.png0.0 ms10.4 KiB
51.la/image/production-2.png0.0 ms9.8 KiB
51.la/image/site/site_007.png0.0 ms9.7 KiB
51.la/image/partner-3.png0.0 ms9.4 KiB
51.la/image/site/site_004.png0.0 ms9.1 KiB
51.la/css/Home-Cjjvo9dx.css0.0 ms8.6 KiB
51.la/png/anquan_logo-DsWQFSvr.png0.0 ms8.6 KiB
51.la/image/production-3.png0.0 ms8.5 KiB
51.la/image/partner-2.png0.0 ms8.5 KiB
51.la/png/v6-icon-DU6mPp9-.png0.0 ms8.0 KiB
51.la/image/footer-bg.png0.0 ms7.4 KiB
51.la/image/site/site_001.png0.0 ms7.4 KiB
51.la/image/site/site_006.gif0.0 ms7.4 KiB
51.la/image/site/site_008.png0.0 ms6.6 KiB
51.la/image/site/site_005.png0.0 ms5.2 KiB
51.la/image/invite.png0.0 ms5.0 KiB
51.la/image/partner-6.png0.0 ms4.6 KiB
51.la/font/iconfont.woff20.0 ms4.4 KiB
51.la/image/partner-4.png0.0 ms4.3 KiB
51.la/image/partner-5.png0.0 ms3.9 KiB
51.la/image/partner-1.png0.0 ms3.2 KiB
cdnstdbs.51.la/static-advertisement/20241127151536-test-ad.png0.0 ms1.9 KiB
51.la/image/community-2-icon.png0.0 ms1.9 KiB
51.la/image/community-1-icon.png0.0 ms1.6 KiB
51.la/image/fuwu-icon-7.png0.0 ms1.6 KiB
51.la/image/community-3-icon.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-5.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-3.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-4.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-2.png0.0 ms1.2 KiB
51.la/image/fuwu-icon-1.png0.0 ms1.1 KiB
51.la/image/fuwu-icon-6.png0.0 ms1.1 KiB
51.la/image/site-more.png0.0 ms421 B
sdk.51.la/icon/4-1.png1296000.0 s1.3 KiB

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.40871399999999997] map[node:map[boundingRect:map[bottom:7019 height:464 left:0 right:1350 top:6555 width:1350] lhId:page-34-DIV nodeLabel:产品 51.la 网站统计V6 51.la 网站统计 51.la 灵雀应用监控 用户中心 最新活动 文档中心 建议与反馈 关于我们 公司简介 注册用户协议 隐… path:1,HTML,1,BODY,0,DIV,0,DIV,2,DIV selector:body > div#app > div#app > div#footbar snippet:<div data-v-bc459d7c="" id="footbar" class="" style=""> type:node] score:0.4] map[node:map[boundingRect:map[bottom:2270 height:914 left:0 right:1350 top:1356 width:1350] lhId:page-39-DIV nodeLabel:与用户共建知识社区 更新日志、常见问题、实战干货、学习成长、分享、共建 产品动态 随时掌握51.LA最新资讯 了解更多 帮助交流 在这里，找到问题答案 问… path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,3,DIV selector:div#app > main.container > div.home > div snippet:<div data-v-6df51acf="" data-v-859a417d=""> type:node] score:0.007837] map[node:map[boundingRect:map[bottom:60 height:60 left:149 right:620 top:0 width:471] lhId:page-33-UL nodeLabel:首页 产品 资讯 文档中心 查询工具 关于我们 path:1,HTML,1,BODY,0,DIV,0,DIV,0,DIV,0,HEADER,1,DIV,0,DIV,0,DIV,1,UL selector:div.inner-bar > div.inner-wrap > div.header-nav-content__left > ul.nav-menu snippet:<ul data-v-b33160fd="" class="nav-menu"> type:node] score:0.000876 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://51.la/font/iconfont.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:780 height:6 left:637 right:652 top:774 width:15] lhId:page-35-LI nodeLabel:幻灯片切换至索引 2 path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,3,UL,1,LI selector:div.section > div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator snippet:<li class="el-carousel__indicator el-carousel__indicator--horizontal"> type:node] score:1e-06]]
headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.022884] map[node:map[boundingRect:map[bottom:1281 height:221 left:0 right:1350 top:1060 width:1350] lhId:page-40-SECTION nodeLabel:本站广告由赞助商提供，请谨慎鉴别，风险自担 path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,2,SECTION selector:div#app > main.container > div.home > section.section snippet:<section data-v-2b659da4="" data-v-859a417d="" class="section section__ads pc" style="display: none;"> type:node] score:0.022884]]

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:37.897 source:map[column:23969 line:97 type:source-location url:https://51.la/js/index-8kzxuVEg.js 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:60.708 source:map[column:24004 line:96 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.228 source:map[column:21208 line:23 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:69.818 source:map[column:68285 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.667 source:map[column:68140 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.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.

URLResource SizeEst Savings
丰富的解决方案，覆盖千行百业 咨询方案 新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和… main.container > div.home > div > section.section
51.la/image/solution-bg.png1.7 MiB976.1 KiB
视频 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-6.png749.1 KiB658.2 KiB
实时访客流量监测 用户行为分析 渠道追踪分析 全量数据开放API接口 数据报表分享 区块链项目统计 适用于Web 3.0 section.section > div.section__service-content > div > div.section__service-content-bottom
51.la/image/fuwu-bottom-right-diqiu.png688.8 KiB572.4 KiB
阅读 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-5.png597.9 KiB521.7 KiB
新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和服务推广，支持数据驱动的决策。 - 数据… section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-1.png546.4 KiB478.5 KiB
使用文档 产品功能和实操介绍，快速上手 了解更多 div > section.section > div.section > div.section
51.la/image/community-3-chatu.png677.1 KiB436.4 KiB
电商 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-4.png308.8 KiB274.8 KiB
政务 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-7.png338.5 KiB264.8 KiB
灵雀 应用性能监控 监测与分析平台，助力用户增长 异常分析 实时预警 性能监测 卡顿 资源雷达 了解更多 section.section > div.section__production-content > div.section__production-content-list > div.section__production-content-item
51.la/image/production-yunran.png305.1 KiB232.0 KiB
通用互联网 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-2.png255.7 KiB221.7 KiB
帮助交流 在这里，找到问题答案 问题反馈 div > section.section > div.section > div.section
51.la/image/community-2-yunran.png263.4 KiB214.7 KiB
App移动统计 免费、易用、专业的移动数据统计与营销分析平台，实现精细化运营，全面提升业务增长效能 了解更多 div.el-carousel__item > div > div.pc > div.section
51.la/gif/banner-app-CKOi1sY_.gif306.1 KiB180.6 KiB
帮助交流 在这里，找到问题答案 问题反馈 div > section.section > div.section > div.section
51.la/image/community-2-chatu.png271.4 KiB176.2 KiB
办公 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-8.png199.2 KiB165.2 KiB
丰富的解决方案，覆盖千行百业 咨询方案 新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和… main.container > div.home > div > section.section
51.la/image/solution-yunran.png201.7 KiB157.4 KiB
2000 万+ 全球网站提供数据统计服务 section.section > div.section__service-content > div.section__service-content-top > div.top-item
51.la/image/fuwu-yunran.png179.6 KiB146.5 KiB
教育 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-3.png147.2 KiB123.6 KiB
汽车 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-9.png146.8 KiB112.7 KiB
全新「屏幕录制」功能上线 带您直观还原用户访问网站的全过程，从鼠标移动到屏幕变化，定位问题根源，让您的网站更懂用户，轻松赢得访客的青睐！ 了解更多 div.el-carousel__item > div > div.pc > div.section
51.la/gif/banner-record-CFc8_6oW.gif204.8 KiB110.6 KiB
产品动态 随时掌握51.LA最新资讯 了解更多 div > section.section > div.section > div.section
51.la/image/community-1-chatu.png219.0 KiB110.6 KiB
div.section__service-content > div > div.section__service-content-bottom > ::after div.section__service-content > div > div.section__service-content-bottom > ::after
51.la/image/fuwu-bottom-left-bg.png146.0 KiB104.1 KiB
产品动态 随时掌握51.LA最新资讯 了解更多 div > section.section > div.section > div.section
51.la/image/community-1-yunran.png103.7 KiB90.0 KiB
查看更多 div.home > div.section > div.section__notice-content > a.section__notice-content-item
51.la/image/ad-more-bg.png92.6 KiB62.9 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png52.4 KiB49.5 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png45.1 KiB42.1 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png43.1 KiB40.1 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-2.png61.9 KiB27.4 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-1.png57.9 KiB23.3 KiB
微信公众号 div.section-wrap > div.footbar-central > div.footbar-central-col > img.qrcode-img
51.la/png/wechat-BpCdW-3I.png23.2 KiB21.6 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png21.1 KiB20.4 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png18.1 KiB17.5 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png17.2 KiB16.6 KiB
安全认证 div.pc > div.footbar-copyright > a > img
51.la/png/anquan_logo-DsWQFSvr.png8.4 KiB8.4 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-3.png9.2 KiB6.4 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-2.png8.4 KiB6.2 KiB
邀请福利 div#app > div.fixed-tool > div.pc > a.tool-item
51.la/image/invite.png4.9 KiB4.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
51.la/css/index-CfDB1C6o.css53.2 KiB81 ms

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.

URLEst Savings
51.la/font/iconfont.woff210 ms

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

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
产品 51.la 网站统计V6 51.la 网站统计 51.la 灵雀应用监控 用户中心 最新活动 文档中心 建议与反馈 关于我们 公司简介 注册用户协议 隐… body > div#app > div#app > div#footbar
0.400
本站广告由赞助商提供，请谨慎鉴别，风险自担 div#app > main.container > div.home > section.section
0.023
与用户共建知识社区 更新日志、常见问题、实战干货、学习成长、分享、共建 产品动态 随时掌握51.LA最新资讯 了解更多 帮助交流 在这里，找到问题答案 问… div#app > main.container > div.home > div
0.008
首页 产品 资讯 文档中心 查询工具 关于我们 div.inner-bar > div.inner-wrap > div.header-nav-content__left > ul.nav-menu
0.001
幻灯片切换至索引 2 div.section > div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator
0.000

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: 40 ms 50.5 KiB
URLTransfer SizeEst Savings
51.la/css/index-CfDB1C6o.css53.1 KiB50.5 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: 240 ms 281.4 KiB
URLTransfer SizeEst Savings
51.la/js/index-8kzxuVEg.js386.6 KiB281.4 KiB

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 reasonFailure type
Internal error.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.

URLTransfer Size
51.la/image/solution-bg.png1.7 MiB
51.la/image/solution-6.png750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png689.7 KiB
51.la/image/community-3-chatu.png678.0 KiB
51.la/image/solution-5.png598.8 KiB
51.la/image/solution-1.png547.2 KiB
51.la/gif/banner-safe-CdaMFx94.gif496.5 KiB
51.la/gif/banner-v6-DJZ15IgC.gif433.9 KiB
51.la/js/index-8kzxuVEg.js387.4 KiB
51.la/image/zhuce-left.png345.5 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
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png
苏州都市网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_006.gif
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png
四川大学商学院 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_012.png
比特币家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_004.png
芦虎 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_007.png
河北慈善网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_009.png
齐鲁晚报 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_002.png
站长之家 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_003.png
襄阳论坛 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_014.png
宠略 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_015.png
LOOKAE div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_008.png
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png
飘域家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_013.png
仙漫网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_010.png
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png
黄河新闻网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_011.png
爱游网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_016.png
div.section > div.header-content > div.banner-text > img.mb-18 div.section > div.header-content > div.banner-text > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png
51LA div.pc > div.footbar-copyright > a > img
sdk.51.la/icon/4-1.png

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

●Max Potential First Input Delay 100 ms
●Document request latency
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.3 s
●Minimizes main-thread work 1.0 s
●Avoid long main-thread tasks 3 long tasks found
●Avoid non-composited animations 2 animated elements found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 620 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 0 ms
○INP breakdown
○LCP request discovery
○User Timing marks and measures
78

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

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.home > section.section > div.section > div.section-flex div.home > section.section > div.section > div.section-flex

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.

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
了解更多 div.banner-text > div.index-animate > button.el-button > span
咨询方案 div > section.section > div.btn > button
咨询客服 div.content > div.info > div.group-btn > button
立即注册 div.container1 > div.register-inner > a > button.register-btn
Copyright © 2002-2026 广州有啦网络科技有限公司 div.footbar > div.pc > div.footbar-copyright > span

These are opportunities to improve the legibility of your content.

Names and labels

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.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

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.inner-bar > div.inner-wrap > div.header-nav-content__left > a.router-link-active div.inner-bar > div.inner-wrap > div.header-nav-content__left > a.router-link-active
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
div#app > div.fixed-tool > div.pc > a.tool-item div#app > div.fixed-tool > div.pc > a.tool-item

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.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
幻灯片切换至索引 3 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 4 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 5 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button

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
●`[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.
●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
●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
●Definition list items are wrapped in `<dl>` elements
●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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○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.
92

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png135 x 256 (0.53)256 x 256 (1.00)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png85 x 106 (0.80)206 x 106 (1.94)
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png45 x 70 (0.64)126 x 70 (1.80)
div.header-content > div.banner-text > div > img.mb-18 div.header-content > div.banner-text > div > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png68 x 47 (1.45)134 x 47 (2.85)

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
51.la/api/sso/lookup
Failed to load resource: the server responded with a status of 401 ()
●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
●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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Detected JavaScript libraries
75

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
登录 header.h5 > div.h5-banner > div > a
注册 header.h5 > div.h5-banner > div > a
联系我们 div#app > div.fixed-tool > div.pc > a.side-tag

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #ContentError
1<!DOCTYPE html>Syntax not understood
2<html lang="zh-CN">Syntax not understood
3 <head>Syntax not understood
4 <meta charset="UTF-8" />Syntax not understood
5 <link rel="icon" type="image/x-icon" href="/favicon.ico" />Syntax not understood
6 <meta name="viewport" content="width=device-width, initial-scale=1.0" />Syntax not understood
7 <meta name="description" content="51LA - 领先的数据统计服务商" />Syntax not understood
8 <title>51LA - 领先的数据统计服务商</title>Syntax not understood
9 <script type="module" crossorigin src="/js/index-8kzxuVEg.js"></script>Syntax not understood
10 <link rel="stylesheet" crossorigin href="/css/index-CfDB1C6o.css">Syntax not understood
11 </head>Syntax not understood
12 <body>Syntax not understood
13 <div id="app"></div>Syntax not understood
14 </body>Syntax not understood
15</html>Syntax not understood

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.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

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
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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