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
51.la/image/solution-6.png	0.0 ms	750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png	0.0 ms	689.7 KiB
51.la/image/solution-5.png	0.0 ms	598.8 KiB
51.la/image/solution-1.png	0.0 ms	547.2 KiB
51.la/gif/h5-banner-v6-VQqRx5UK.gif	0.0 ms	464.5 KiB
51.la/js/index-8kzxuVEg.js	0.0 ms	387.4 KiB
51.la/image/h5-zhuce-chatu.png	0.0 ms	352.4 KiB
51.la/image/solution-7.png	0.0 ms	339.0 KiB
51.la/image/solution-4.png	0.0 ms	309.3 KiB
51.la/image/production-yunran.png	0.0 ms	305.6 KiB
51.la/gif/h5-banner-safe-CbAxJLWD.gif	0.0 ms	282.3 KiB
51.la/image/community-2-chatu.png	0.0 ms	271.9 KiB
51.la/image/h5-community-3-chatu.png	0.0 ms	267.9 KiB
51.la/gif/h5-banner-perf-DlNDW4y3.gif	0.0 ms	264.0 KiB
51.la/image/community-2-yunran.png	0.0 ms	263.8 KiB
51.la/gif/h5-banner-app-BM7ZnPup.gif	0.0 ms	257.7 KiB
51.la/image/solution-2.png	0.0 ms	256.1 KiB
51.la/image/community-1-chatu.png	0.0 ms	219.3 KiB
51.la/gif/h5-banner-record-yimXOmEo.gif	0.0 ms	207.4 KiB
51.la/image/solution-8.png	0.0 ms	199.5 KiB
51.la/image/solution-3.png	0.0 ms	147.5 KiB
51.la/image/solution-9.png	0.0 ms	147.1 KiB
51.la/image/fuwu-bottom-left-bg.png	0.0 ms	146.3 KiB
51.la/image/community-1-yunran.png	0.0 ms	104.0 KiB
51.la/image/site-group-bg.png	0.0 ms	96.9 KiB
cdnstdbs.51.la/static-advertisement/20260417172638-20260417-172542.gif	0.0 ms	79.9 KiB
51.la/image/evaluate-bg-2.png	0.0 ms	62.1 KiB
51.la/image/evaluate-bg-1.png	0.0 ms	58.1 KiB
51.la/css/index-CfDB1C6o.css	0.0 ms	53.2 KiB
51.la/image/evaluate-icon-3.png	0.0 ms	52.6 KiB
51.la/image/evaluate-icon-2.png	0.0 ms	45.3 KiB
51.la/image/evaluate-icon-1.png	0.0 ms	43.2 KiB
51.la/image/evaluate-bg-3.png	0.0 ms	37.1 KiB
51.la/png/wechat-BpCdW-3I.png	0.0 ms	23.4 KiB
51.la/image/wechat.png	0.0 ms	23.4 KiB
51.la/image/evaluate-name-2.png	0.0 ms	21.2 KiB
51.la/image/site/site_012.png	0.0 ms	20.6 KiB
51.la/image/site/site_009.png	0.0 ms	19.0 KiB
51.la/image/evaluate-name-1.png	0.0 ms	18.2 KiB
51.la/image/site/site_014.png	0.0 ms	18.0 KiB
51.la/image/site/site_013.png	0.0 ms	17.6 KiB
51.la/image/evaluate-name-3.png	0.0 ms	17.4 KiB
51.la/image/site/site_015.png	0.0 ms	16.0 KiB
51.la/image/site/site_017.png	0.0 ms	15.9 KiB
51.la/image/site/site_002.png	0.0 ms	15.1 KiB
51.la/image/site/site_010.png	0.0 ms	14.1 KiB
51.la/image/site/site_003.png	0.0 ms	13.2 KiB
51.la/image/production-1.png	0.0 ms	12.6 KiB
51.la/image/site/site_018.png	0.0 ms	11.7 KiB
51.la/js/Home-CKY2M37V.js	0.0 ms	11.2 KiB
51.la/image/site/site_011.png	0.0 ms	10.8 KiB
51.la/image/site/site_016.png	0.0 ms	10.7 KiB
51.la/image/production-2.png	0.0 ms	9.8 KiB
51.la/image/site/site_007.png	0.0 ms	9.7 KiB
51.la/image/partner-3.png	0.0 ms	9.4 KiB
51.la/image/site/site_004.png	0.0 ms	9.1 KiB
51.la/css/Home-Cjjvo9dx.css	0.0 ms	8.6 KiB
51.la/png/anquan_logo-DsWQFSvr.png	0.0 ms	8.6 KiB
51.la/image/production-3.png	0.0 ms	8.5 KiB
51.la/image/partner-2.png	0.0 ms	8.5 KiB
51.la/png/v6-icon-DU6mPp9-.png	0.0 ms	8.0 KiB
51.la/image/site/site_001.png	0.0 ms	7.4 KiB
51.la/image/site/site_006.gif	0.0 ms	7.4 KiB
51.la/image/site/site_008.png	0.0 ms	6.6 KiB
51.la/image/site/site_005.png	0.0 ms	5.2 KiB
51.la/image/partner-6.png	0.0 ms	4.6 KiB
51.la/font/iconfont.woff2	0.0 ms	4.4 KiB
51.la/image/partner-4.png	0.0 ms	4.3 KiB
51.la/image/partner-5.png	0.0 ms	3.9 KiB
51.la/image/partner-1.png	0.0 ms	3.2 KiB
cdnstdbs.51.la/static-advertisement/20241127151536-test-ad.png	0.0 ms	1.9 KiB
51.la/image/community-2-icon.png	0.0 ms	1.9 KiB
51.la/image/community-1-icon.png	0.0 ms	1.6 KiB
51.la/image/community-3-icon.png	0.0 ms	1.3 KiB
51.la/image/site-more.png	0.0 ms	420 B
51.la/image/computer-icon.png	0.0 ms	340 B
sdk.51.la/icon/4-1.png	1296000.0 s	1.3 KiB

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:113.109 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:11.479 source:map[column:44479 line:21 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.232 source:map[column:21208 line:23 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:113.109 source:map[column:24031 line:96 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:2.475 source:map[type:text value:[unattributed]]] map[reflowTime:76.73 source:map[column:68285 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:1.137 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.

	URL	Resource Size	Est Savings
视频 - 观众洞察：通过用户画像、用户行为分析等，可以帮助视频服务商了解观众的需求和喜好，以便于调整和优化他们的内容策略。根据用户的观看历史和偏好，提供个性… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-6.png	749.1 KiB	658.2 KiB
300 万+ 网站开发者的选择 2000 万+ 全球网站提供数据统计服务 1 个账号通用51LA旗下所有服务 `div > section.section > div.section__service-content > div.section__service-content-wrap`	51.la/image/fuwu-bottom-right-diqiu.png	688.8 KiB	572.4 KiB
阅读 - 内容推荐：根据用户的阅读历史和偏好，提供个性化的内容推荐，提升用户的阅读体验。 - 用户洞察：通过用户画像、用户行为分析等，帮助出版商了解读者的… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-5.png	597.9 KiB	521.7 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.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-1.png	546.4 KiB	478.5 KiB
免费、易用、专业的网站数据统计与营销分析平台欢迎加入51.LA，开启您的统计之旅立即注册 `main.container > div.home > div > div.register-now`	51.la/image/h5-zhuce-chatu.png	351.9 KiB	276.7 KiB
电商 - 用户洞察：通过用户画像、用户行为分析等，帮助商家了解用户的消费习惯、喜好、购买力等信息，以便于更好地进行精准营销。 - 流量统计和分析及数据管理：… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-4.png	308.8 KiB	274.8 KiB
政务 - 政务服务平台：帮助政府机构建设一站式政务服务门户，进行站点数据统计和分析，优化政务门户业务流，方便市民办事。 - 数据可视化：帮助政府部门将大量… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-7.png	338.5 KiB	264.8 KiB
V5 网站统计专注于网站统计16年，助站长们更高效经营网站实时监测访问流量流量趋势分析稳定性接口洞察分析用户行为 `section.section > div.section__production-content > div.section__production-content-list > div.section__production-content-item`	51.la/image/production-yunran.png	305.1 KiB	232.0 KiB
通用互联网 - 数据统计与分析系统： 51.LA提供了全面的统计分析工具，可以帮助企业实时监测网站、APP、小程序的访问量、活跃用户数、页面浏览量、停留时间等… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-2.png	255.7 KiB	221.7 KiB
帮助交流在这里，找到问题答案 `div > section.section > div.section > div.section`	51.la/image/community-2-yunran.png	263.4 KiB	214.7 KiB
使用文档产品功能和实操介绍，快速上手 `div > section.section > div.section > div.section`	51.la/image/h5-community-3-chatu.png	267.4 KiB	213.4 KiB
帮助交流在这里，找到问题答案 `div > section.section > div.section > div.section`	51.la/image/community-2-chatu.png	271.4 KiB	176.2 KiB
办公 - 办公站点数据监控：通过埋点站点行为事件，监控用户站点使用情况：使用路径、时长等，追踪用户动线，提高团队协作效率。 - 决策分析：数据分析工具可以… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-8.png	199.2 KiB	165.2 KiB
div > div.h5 > div.section > ::before `div > div.h5 > div.section > ::before`	51.la/gif/h5-banner-app-BM7ZnPup.gif	257.1 KiB	146.5 KiB
教育 - 学员数据管理：帮助学校或培训机构管理学员的数据进行管理等。 - 教育数据分析：数据分析工具可以帮助学校或培训机构分析学员的学习数据，了解学员的行… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-3.png	147.2 KiB	123.6 KiB
汽车 - 汽车智能化：帮助汽车制造商打造智能网联汽车，通过实时采集车辆数据，实现远程诊断、故障预警等功能，提升驾驶体验。 - 智能出行：帮助交通管理部门实… `section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item`	51.la/image/solution-9.png	146.8 KiB	112.7 KiB
div > div.h5 > div.section > ::before `div > div.h5 > div.section > ::before`	51.la/gif/h5-banner-record-yimXOmEo.gif	207.0 KiB	111.8 KiB
产品动态随时掌握51.LA最新资讯 `div > section.section > div.section > div.section`	51.la/image/community-1-chatu.png	219.0 KiB	110.6 KiB
300 万+ 网站开发者的选择 2000 万+ 全球网站提供数据统计服务 1 个账号通用51LA旗下所有服务 `div > section.section > div.section__service-content > div.section__service-content-wrap`	51.la/image/fuwu-bottom-left-bg.png	146.0 KiB	104.1 KiB
产品动态随时掌握51.LA最新资讯 `div > section.section > div.section > div.section`	51.la/image/community-1-yunran.png	103.7 KiB	90.0 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.png	52.4 KiB	43.4 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.png	45.1 KiB	36.0 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.png	43.1 KiB	34.0 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.png	61.9 KiB	27.4 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.png	57.9 KiB	23.3 KiB
四川大学商学院 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_012.png	20.4 KiB	19.6 KiB
微信公众号 `div.footbar-central > div > div.footbar-central-col > img.qrcode-img`	51.la/png/wechat-BpCdW-3I.png	23.2 KiB	19.2 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.png	21.1 KiB	19.1 KiB
河北慈善网 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_009.png	18.8 KiB	18.2 KiB
襄阳论坛 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_014.png	17.8 KiB	17.0 KiB
飘域家园 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_013.png	17.4 KiB	16.9 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.png	18.1 KiB	16.2 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.png	17.2 KiB	15.2 KiB
宠略 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_015.png	15.8 KiB	15.0 KiB
买米网 `div.site-container > div.site-more > div.itemPC > img`	51.la/image/site/site_017.png	15.7 KiB	14.9 KiB
齐鲁晚报 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_002.png	14.9 KiB	14.2 KiB
仙漫网 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_010.png	13.9 KiB	13.3 KiB
站长之家 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_003.png	13.1 KiB	12.5 KiB
兔客 `div.site-container > div.site-more > div.itemPC > img`	51.la/image/site/site_018.png	11.5 KiB	10.8 KiB
黄河新闻网 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_011.png	10.6 KiB	10.2 KiB
爱游网 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_016.png	10.5 KiB	10.0 KiB
芦虎 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_007.png	9.6 KiB	8.7 KiB
比特币家园 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_004.png	9.0 KiB	8.2 KiB
安全认证 `div > div.footbar-central-col > a.anquan-link > img`	51.la/png/anquan_logo-DsWQFSvr.png	8.4 KiB	7.7 KiB
酷家乐 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_001.png	7.2 KiB	6.6 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.png	9.2 KiB	6.4 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.png	8.4 KiB	6.2 KiB
LOOKAE `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_008.png	6.5 KiB	5.8 KiB
苏州都市网 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_006.gif	7.2 KiB	5.6 KiB
主题镇 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_005.png	5.0 KiB	4.3 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:34.009 label:Time to first byte subpart:timeToFirstByte] map[duration:4601.796 label:Element render delay subpart:elementRenderDelay]]

lhId: page-47-DIV

nodeLabel: 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

path: 1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,2,DIV,1,DIV,1,DIV,1,DIV,0,DIV

selector: div.el-carousel__item > div > div.h5 > div.section

snippet: <div data-v-55f70532="" class="section section__banner-item section__banner-item-perf app-bg-h5">

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.

URL	Transfer Size	Duration
51.la/css/index-CfDB1C6o.css	53.2 KiB	301 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.

URL	Est Savings
51.la/font/iconfont.woff2	10 ms

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.

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: 150 ms 50.4 KiB

URL	Transfer Size	Est Savings
51.la/css/index-CfDB1C6o.css	53.1 KiB	50.4 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: 1.5 s 281.4 KiB

URL	Transfer Size	Est Savings
51.la/js/index-8kzxuVEg.js	386.6 KiB	281.4 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	1.6 s
Style & Layout	1.1 s
Script Evaluation	1.0 s
Rendering	368 ms
Parse HTML & CSS	61 ms
Garbage Collection	17 ms
Script Parsing & Compilation	11 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
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.

URL	Transfer Size
51.la/image/solution-6.png	750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png	689.7 KiB
51.la/image/solution-5.png	598.8 KiB
51.la/image/solution-1.png	547.2 KiB
51.la/gif/h5-banner-v6-VQqRx5UK.gif	464.5 KiB
51.la/js/index-8kzxuVEg.js	387.4 KiB
51.la/image/h5-zhuce-chatu.png	352.4 KiB
51.la/image/solution-7.png	339.0 KiB
51.la/image/solution-4.png	309.3 KiB
51.la/image/production-yunran.png	305.6 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
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
买米网 `div.site-container > div.site-more > div.itemPC > img`	51.la/image/site/site_017.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
兔客 `div.site-container > div.site-more > div.itemPC > img`	51.la/image/site/site_018.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.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.png
主题镇 `div.site-container > div.range-container > div.itemPC > img`	51.la/image/site/site_005.png

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

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●JavaScript execution time 1.0 s

●Avoid long main-thread tasks 6 long tasks found

●Avoid non-composited animations 2 animated elements found

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 510 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

○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
咨询方案 `div > section.section > div.btn > button`
立即注册 `div.register-now > div.h5-inner > a > button.register-btn`
Copyright © 2002-2026 广州有啦网络科技有限公司 `div#footbar > div.footbar > div.footbar-copyright > div`

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
免费、易用、专业的网站数据统计与营销分析平台 `div.section > div.header-content > div.banner-text > h4.index-animate`

These are opportunities to improve keyboard navigation in your application.

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__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`

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>`

●`[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

●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

●Document has a main landmark.

○`[accesskey]` values are unique

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

○Deprecated ARIA roles were not used

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[role]`s have all required `[aria-*]` attributes

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○`[role]` values are valid

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

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

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

○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.

○Identical links have the same purpose.

○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

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.

	URL	Aspect 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.png	135 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.png	135 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.png	135 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.png	95 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.png	95 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.png	85 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-.png	60 x 70 (0.86)	126 x 70 (1.80)
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	68 x 47 (1.45)	134 x 47 (2.85)
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.png	68 x 26 (2.62)	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.

Source	Description
51.la/api/sso/lookup	`Failed to load resource: the server responded with a status of 401 ()`

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
51.la/js/index-8kzxuVEg.js	51.la/js/index-8kzxuVEg.js.map
51.la/js/Home-CKY2M37V.js	51.la/js/Home-CKY2M37V.js.map

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●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

○Redirects HTTP traffic to HTTPS

○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
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 #	Content	Error
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__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`