https://bilibili.com
Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.SCORE
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Detailed Report
Audit breakdown by category with detailed findings.
69
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 |
|---|---|---|
| s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js | 600.0 s | 151.7 KiB |
| s1.hdslb.com/bfs/seed/log/report/log-reporter.js | 600.0 s | 41.8 KiB |
| s1.hdslb.com/bfs/seed/jinkela/short/b-mirror/biliMirror.umd.mini.js | 600.0 s | 32.7 KiB |
| s1.hdslb.com/bfs/seed/jinkela/short/reporter-pb/index.js | 600.0 s | 30.6 KiB |
| s1.hdslb.com/bfs/seed/jinkela/short/watchlater-pip/watchlater-pip.umd.js | 600.0 s | 22.8 KiB |
| s1.hdslb.com/bfs/cm/cm-sdk/static/js/bili-collect.js | 600.0 s | 13.2 KiB |
| s1.hdslb.com/bfs/seed/jinkela/short/bmg/register/fallback.js | 600.0 s | 6.3 KiB |
| s1.hdslb.com/bfs/seed/jinkela/kv-sdk/index.js | 600.0 s | 5.9 KiB |
| s1.hdslb.com/bfs/seed/log/report/86.e192d.function.chunk.js | 600.0 s | 2.1 KiB |
| s1.hdslb.com/bfs/seed/log/report/950.3cf17.function.chunk.js | 600.0 s | 1.9 KiB |
| /gentleman/polyfill.js?features=es2015%2Ces2016%2Ces2017%... | 600.0 s | 284 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.
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:45.446 source:map[column:72319 line:2 type:source-location url:https://s1.hdslb.com/bfs/seed/log/report/log-reporter.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:89.965 source:map[type:text value:[unattributed]]] map[reflowTime:2.712 source:map[column:69824 line:1 type:source-location url:https://s1.hdslb.com/bfs/seed/log/report/log-reporter.js urlProvider:network]] map[reflowTime:42.734 source:map[column:69570 line:1 type:source-location url:https://s1.hdslb.com/bfs/seed/log/report/log-reporter.js urlProvider:network]] map[reflowTime:0.901 source:map[column:57763 line:34 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js urlProvider:network]] map[reflowTime:1.642 source:map[column:668278 line:52 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js urlProvider:network]] map[reflowTime:0.782 source:map[column:3820 line:20 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js urlProvider:network]] map[reflowTime:0.22 source:map[column:46719 line:1 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/b-mirror/biliMirror.umd.mini.js urlProvider:network]] map[reflowTime:4.654 source:map[column:363242 line:0 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js urlProvider:network]] map[reflowTime:0.784 source:map[column:363353 line:0 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js urlProvider:network]] map[reflowTime:0.277 source:map[column:40121 line:52 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js urlProvider:network]] map[reflowTime:0.183 source:map[column:361643 line:0 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js urlProvider:network]] map[reflowTime:0.648 source:map[column:342717 line:0 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js urlProvider:network]] map[reflowTime:3.004 source:map[column:342461 line:0 type:source-location url:https://s1.hdslb.com/bfs/seed/jinkela/short/minntaki-wasm-sdk/bili-sc-sdk.umd.js urlProvider:network]] map[reflowTime:8.856 source:map[column:56039 line:34 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js urlProvider:network]] map[reflowTime:3.489 source:map[column:561348 line:52 type:source-location url:https://s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.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 | |
|---|---|---|---|
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/e52d6aecd75db0e310c73185304fd927834ac716.png@1c.webp | 133.7 KiB | 106.6 KiB |
全员危局，正义倒计时！ div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/f48a2e0699ed0e1ad416643b00b1c22ff6110c84.png@... | 66.4 KiB | 42.9 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/6970b12a96d85dd28a0aeb803eb3428dfec771bb.png@1c.webp | 54.8 KiB | 42.2 KiB |
你被外星人抓了，想回地球需3个小时内，吃完其中一盘茶点。 div.bili-video-card__image > div.bili-video-card__image--wrap > picture.v-img > img | /bfs/archive/18057756bf3d62b6645a90b4f2c0794e9ccf76df.jpg... | 37.7 KiB | 31.2 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/85e5279a1d53d4cb46033e1619d78628415f98c4.png@1c.webp | 34.0 KiB | 27.1 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/62aee277e1d935580f66d296f349bd358cd956a0.png@1c.webp | 32.3 KiB | 25.7 KiB |
禁闭求生2春季更新测评 div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/6473d8810dd2dcfef3c13944d6877d8b0fb750cc.png@... | 38.7 KiB | 25.0 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/446466499bd9615bc950ec4d8ec63647defc05b6.png@1c.webp | 32.7 KiB | 24.9 KiB |
墨西哥街头柴火烤肉！ div.bili-video-card__image > div.bili-video-card__image--wrap > picture.v-img > img | /bfs/archive/9ed1bb53defbf1bccebb6c158d1a84425bab433e.jpg... | 30.1 KiB | 24.8 KiB |
专属全家人的春季健康守护方案来啦！>> div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/ea1cc3c6fdd72e1dd4bffe839d27f7abc840e1c0.jpg@... | 37.7 KiB | 24.4 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/0095303b06f64e05ba354655c0a6c83fb618f8e7.png@1c.webp | 29.1 KiB | 23.2 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/34c3621fc6fed4e16eab30d0448b35554711bfeb.png@1c.webp | 28.8 KiB | 23.0 KiB |
我和书的故事，要说的有很多 div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/7451679d1f0131b5fcc47a5093c18d961ee7b432.jpg@... | 34.3 KiB | 22.2 KiB |
生日回顾上线！张真源 “源”来是你 div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/4f0e4589091387ddfebcb929ea34044a10cacee6.png@... | 30.8 KiB | 19.9 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/0415c092aa2c61c1ca25ba69b8c77130f1ab37c3.png@1c.webp | 24.2 KiB | 19.3 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/0546ed600f8dcfcf4c2eb3212ed1e12178abdb86.png@1c.webp | 24.1 KiB | 19.2 KiB |
div.bili-header > div.bili-header__banner > picture#bili-header-banner-img > img div.bili-header > div.bili-header__banner > picture#bili-header-banner-img > img | /bfs/archive/a8dcb9d05c22e7e5cfb1bbd0d97092f4edd357ef.png... | 35.8 KiB | 17.5 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/f14b431627327dda93f34b13392a3a773be5e788.png@1c.webp | 24.3 KiB | 16.9 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/b3ee9e71fbcc0520a1ac32e2b3a2d0dc6086bb9b.png@1c.webp | 20.5 KiB | 16.3 KiB |
台湾票房年冠！当电车难题成为现实 div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/003faabaef31c07f0761b691c3ec94c0eab45b1b.png@... | 24.4 KiB | 15.8 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/8f51a0828e322ca0576f449ceb45cca453735506.png@1c.webp | 19.1 KiB | 15.3 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/d81527e08e5031badd870819fa801f6fd41fc021.png@1c.webp | 18.7 KiB | 14.9 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/83e19c7274daec8f0e7d97cd6ad888e3e43b8083.png@1c.webp | 18.2 KiB | 14.5 KiB |
九派大比开启，咱们一起组个队？ div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/543efb1fe0d2befca540343e540d175faf43e1cb.png@... | 20.8 KiB | 13.5 KiB |
地铁系列新作首曝PV独家首发！ >> div.carousel-area-img > a.carousel-item > picture.v-img > img | /bfs/banner/cbc33c2b4414ae3307ca60ad99898c5ea1c19b6f.png@... | 19.6 KiB | 12.7 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/3d4a9667931a9a20011a384b7d699c3b286b82ab.png@1c.webp | 16.7 KiB | 12.5 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/752ba46c080dca88401aac470f134ac0e6444705.png@1c.webp | 14.4 KiB | 12.1 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/3505e4538c81fce91fa5e6dacd4703d8277df021.png@1c.webp | 14.2 KiB | 11.3 KiB |
div.watchlater-pip-button-inner > div.btn-icon > picture.v-img > img div.watchlater-pip-button-inner > div.btn-icon > picture.v-img > img | /bfs/static/jinkela/long/images/wlpip-playing-active.gif@... | 11.5 KiB | 11.1 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/82a15b3fda5ce240bac44b8d0b793b13c3bafc4e.png@1c.webp | 13.2 KiB | 10.5 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/9316d140598d5dc7e86d72e4a99ed903953d2e76.png@1c.webp | 11.9 KiB | 9.5 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/0b9b00f62fd5760dc64fa16c564591957c3ace05.png@1c.webp | 11.8 KiB | 9.4 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/f8720df769d23c497096f57b73528265fd6b554a.png@1c.webp | 12.0 KiB | 9.2 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/83615a69b1ecab29163a54912260fd624a886906.png@1c.webp | 12.2 KiB | 9.2 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/e3607ba671317e2b1e4990a9225cbf9981a7a414.png@1c.webp | 10.9 KiB | 8.7 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/2a4e5f40421d467e841b24eed228910bf965d4a1.png@1c.webp | 10.8 KiB | 8.6 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/4e2110157727360d88357840903ed05b6b94c453.png@1c.webp | 10.4 KiB | 8.3 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/eca4ed09885bef57072526002c8900467a07dc3f.png@1c.webp | 9.4 KiB | 7.5 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/fa622f4b21c7fb66f84ebf87d36faaaa993363f0.png@1c.webp | 8.8 KiB | 7.0 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/3c711c23ae57db96468a23e2beca49ce66f12c73.png@1c.webp | 8.2 KiB | 6.6 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/9afdb972babc0fed529e241176bad847a8094774.png@1c.webp | 7.3 KiB | 5.9 KiB |
a.font-medium > div.living > picture.v-img > img a.font-medium > div.living > picture.v-img > img | i2.hdslb.com/bfs/static/jinkela/long/images/live.gif@24w_24h.avif | 5.4 KiB | 5.3 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/1fb1501cd66d326f296e78a4561f7cc89c48d719.png@1c.webp | 6.3 KiB | 5.0 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/0cfe34374720653a8f67d68af761d239eca15da7.png@1c.webp | 6.2 KiB | 5.0 KiB |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img | i2.hdslb.com/bfs/vc/48bee957f95b7bc5f0e1b7fc14b25a4cca26901a.png@1c.webp | 5.5 KiB | 4.4 KiB |
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: div.bili-header > div.bili-header__banner > picture#bili-header-banner-img > img
path: 1,HTML,1,BODY,2,DIV,5,DIV,1,DIV,1,DIV,0,PICTURE,8,IMG
selector: div.bili-header > div.bili-header__banner > picture#bili-header-banner-img > img
snippet: <img src="https://i0.hdslb.com/bfs/archive/a8dcb9d05c22e7e5cfb1bbd0d97092f4edd357ef.…" alt="" loading="eager" onload="headerBannerLoaded();window.__homepage_header_static_img_load__=true" onerror="typeof window.imgOnError === 'function' && window.imgOnError(this)" data-v-5b412c11="">
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 |
|---|---|---|
| s1.hdslb.com/bfs/seed/log/report/log-reporter.js | 41.8 KiB | |
| s1.hdslb.com/bfs/seed/jinkela/short/b-mirror/biliMirror.umd.mini.js | 32.7 KiB | |
| s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-4e78abb0.css | 57.5 KiB | 288 ms |
| s1.hdslb.com/bfs/seed/jinkela/short/bmg/register/fallback.js | 6.3 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: 861 ms
| URL | Time Spent |
|---|---|
| bilibili.com/ | 861 ms |
| www.bilibili.com/ | 0.0 ms |
Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.
Why this matters
Performance issues directly impact user engagement and conversion rates.
Estimated savings: 549 ms
| URL | Time Spent |
|---|---|
| www.bilibili.com/ | 649 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: 40 ms 46.6 KiB
| URL | Transfer Size | Est Savings |
|---|---|---|
| s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-4e78abb0.css | 56.6 KiB | 46.6 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: 120 ms 127.1 KiB
| URL | Transfer Size | Est Savings |
|---|---|---|
| s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js | 355.3 KiB | 127.1 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 |
|---|---|
| Script Evaluation | 1.2 s |
| Other | 778 ms |
| Style & Layout | 230 ms |
| Script Parsing & Compilation | 40 ms |
| Parse HTML & CSS | 34 ms |
| Rendering | 33 ms |
| Garbage Collection | 30 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 |
More information about the performance of your application. These numbers don't directly affect the Performance score.
●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 2,202 KiB
●JavaScript execution time 0.8 s
●Avoid long main-thread tasks 6 long tasks found
●Image elements have explicit `width` and `height`
●Network Requests
●Network Round Trip Times 220 ms
●Server Backend Latencies 380 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
69
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.
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 |
|---|
div.carousel-container > div.vui_carousel > div.carousel-arrows > button div.carousel-container > div.vui_carousel > div.carousel-arrows > button |
div.carousel-container > div.vui_carousel > div.carousel-arrows > button div.carousel-container > div.vui_carousel > div.carousel-arrows > button |
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.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > 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.
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 |
|---|
登录 li.v-popover-wrap > div.right-entry__outside > div.header-login-entry > span |
立即登录 div.v-popover > div.v-popover-content > div.login-panel-popover > div.login-btn |
点我注册 div.v-popover-content > div.login-panel-popover > div.register-tip > span.register-exper |
投稿 li.v-popover-wrap > div > div.header-upload-entry > span.header-upload-entry__text |
小草律师呀 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-10 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
LMasmr div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-12 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
GenJi是真想教会你 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-12 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
诺言其实是小猫 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-11 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
KARAKU_ div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-10 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
墨西哥老林 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-10 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
SUtopia_苏新皓 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--author |
· 04-12 div.bili-video-card__info--right > div.bili-video-card__info--bottom > a.bili-video-card__info--owner > span.bili-video-card__info--date |
直播中 p.title > a.font-medium > div.living > span |
These are opportunities to improve the legibility of your content.
Tables and lists
Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.
Why this matters
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
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首次使用？ 点我注册 div.bili-header__bar > ul.right-entry > li.right-entry-item > li.v-popover-wrap |
大会员 ul.right-entry > li.right-entry-item > div.vip-wrap > li.v-popover-wrap |
投稿 div.bili-header__bar > ul.right-entry > li.right-entry-item > li.v-popover-wrap |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●Form elements have associated labels
●`[accesskey]` values are unique
●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>`).
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
○`[aria-*]` attributes match their roles
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA attributes are used as specified for the element's role
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements use only permitted ARIA attributes
○`[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
○`[aria-*]` attributes have valid values
○`[aria-*]` attributes are valid and not misspelled
○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
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
○`<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
○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.
77
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 |
|---|---|
| StorageType.persistent is deprecated. Please use standardized navigator.storage instead. | s1.hdslb.com/bfs/seed/log/report/log-reporter.js line 1, col 20120 |
| Unload event listeners are deprecated and will be removed. | s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js line 4, col 22012 |
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 |
|---|---|
s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js line 16, col 22135 | Hydration completed but contains mismatches. |
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
92
SEO
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Content Best Practices
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.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > img |
div.bili-header__banner > div.animated-banner > div.layer > img div.bili-header__banner > div.animated-banner > div.layer > 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
●Links are crawlable
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`