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Results for https://bilibili.com

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CN · CNY (¥) · Estimated Applicable regulations: PIPL Dev cost: ¥350/hr How jurisdiction is detected
United Stated United Stated · New York Completed: Apr 16, 2026 17:24 UTC
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Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
D67

Site Health

Score: 67 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Several issues make your site difficult for assistive technology users.

Solid SEO basics — a few optimizations could boost rankings.

Good server performance with room for optimization.

Several regulatory requirements are not yet met.

Missing metadata means poor previews on social media and search.

Heavier than average — reducing page weight saves energy and bandwidth.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Apple sites average 73
-6 below average
Better than 1% of Apple sites See full Apple benchmark →
Bulma sites average 75
-8 below average
Better than 1% of Bulma sites See full Bulma benchmark →

Top Priorities (5)

1

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
2

HSTS header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
3

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy
4

1 link(s) with no accessible text

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Link & Button Quality
5

2 button(s) with no accessible text

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Link & Button Quality
View fix priority matrix

Fix Priority Matrix

5 findings

Quick Wins

3

High impact, low effort — start here.

Strategic

2

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →
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What fixing these means

Your site has several issues that may be affecting user experience and business outcomes. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.
2 accessibility issues exclude users who rely on assistive technology.
C
Could reach Estimate based on resolving critical issues

Conversion Barriers

4 critical 6 warning

10 barrier(s) likely increasing bounce by ~40%.

Speed (2)

Page takes 18.1s to load

+12% bounce

Users abandon at ~3s — you're 15.6s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

Page feels frozen for 1.9s

+5% bounce

Clicks on the primary CTA are ignored while JavaScript runs

Fix: Break up long tasks; defer non-critical JavaScript to post-hydration

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Usability (1)

No viewport meta tag

+15% bounce

Mobile browsers render at desktop width and shrink — text unreadable, tap targets miniature

Fix: Add <meta name="viewport" content="width=device-width, initial-scale=1">

Content (3)

No Open Graph tags

+2% bounce

Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop

Fix: Add og:title, og:description, og:image, og:url to the page head

No structured data

+2% bounce

No rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices

Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)

Thin content

+3% bounce

Under 300 words — visitors bounce looking for substance, search engines rank competitors first

Fix: Add a substantive FAQ, product detail, or case-study section

Navigation (2)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

24 broken link(s) on the page

+5% bounce

Clicks land on 404s — trust drops and the session often ends

Fix: Fix or remove the broken destinations surfaced on the Content tab

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

¥1,575 investment → ¥5.54/month returns + CNY 50,000,000 risk avoided

Payback period: > 2 years First-year ROI: -96%

Investment

¥1,575

4h · 5 findings

Monthly returns

¥5.54 /mo

~¥66 / year

  • Bandwidth savings ¥5.54

Regulatory risk avoided

CNY 50,000,000

if kept compliant

  • PIPL CNY 50,000,000

¥525 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

¥1,575

4.5 developer hours at ¥350/hr

Based on China rates (¥350/hr)

Quick wins
¥525 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions
¥ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

¥4,166,672 / month at risk

~¥50,000,066 / year if left unfixed

Compliance Risk

¥50,000,000

PIPL
  • No privacy policy link detected
    PIPL: CNY 100,000 – CNY 50,000,000
  • Trackers detected but no cookie policy found
    PIPL: CNY 100,000 – CNY 50,000,000
  • Trackers detected but no privacy policy found
    PIPL: CNY 100,000 – CNY 50,000,000

+1 more

Bandwidth Waste

¥5.54 /mo

9695.4 MB/mo × 0.571 CNY/GB

  • Optimize transfer: save ~970 KB per page load
    Saves ¥5.54/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Unique monthly visitors from your analytics

Purchases, signups, or key actions

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue
Current bounce (est.)
After fixes (est.)
Estimated bounce reduction

Fix 5 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

5.01 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

18.06 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.85 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.74 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

18.06 s

Detailed Report

Audit breakdown by category with detailed findings.

32

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

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

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.

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:48.138 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:99.738 source:map[type:text value:[unattributed]]] map[reflowTime:1.564 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:46.574 source:map[column:69570 line:1 type:source-location url:https://s1.hdslb.com/bfs/seed/log/report/log-reporter.js urlProvider:network]]]

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-0-IMG
nodeLabel: 终于来了!大疆Pocket 4上手
path: 2,HTML,1,BODY,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,A,0,DIV,0,DIV,0,DIV,0,PICTURE,1,IMG
selector: div.bfs-img-wrap > div.bfs-img > picture.b-img__inner > img
snippet: <img src="//i1.hdslb.com/bfs/archive/18363340c0b4de9cfcd415a0f94b1abbc693c2e8.jpg@38…" alt="终于来了!大疆Pocket 4上手" loading="lazy" onload="bmgCmptOnload(this)" onerror="bmgCmptOnerror(this)">

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

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: 2.5 s
URLTime Spent
bilibili.com/1.5 s
www.bilibili.com/1.0 s
m.bilibili.com/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

CategoryTime Spent
Script Evaluation3.1 s
Style & Layout758 ms
Other701 ms
Script Parsing & Compilation540 ms
Parse HTML & CSS202 ms
Garbage Collection63 ms
Rendering44 ms

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
Improve image delivery
LCP breakdown
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Minify CSS
Avoid long main-thread tasks 15 long tasks found
Image elements have explicit `width` and `height`
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 240 ms
Server Backend Latencies 310 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 320 ms
INP breakdown
User Timing marks and measures
Avoid non-composited animations
Avoid large layout shifts
75

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
Download App div.m-navbar > div.right > m-open-app.m-open-app > div.open-app-img
Open in App m-open-app.m-open-app > button.v5-button > div.v5-button__content__wrap > span

These are opportunities to improve the legibility of your content.

Names and labels

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.suspension-box > div.m-navbar > div.right > a.search div.suspension-box > div.m-navbar > div.right > a.search

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.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
首页 番剧 国创 纪录片 电影 电视剧 影视 娱乐 音乐 舞蹈 动画 绘画 鬼畜 游戏 资讯 知识 人工智能 科技数码 汽车 时尚美妆 家装房产 户外潮流 健… div > div.v-switcher__header > div.v-switcher__header__tabs__wrap > ul.v-switcher__header__tabs__list

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
head > meta head > meta

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

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
Image elements have `[alt]` attributes
ARIA attributes are used as specified for the element's role
Elements use only permitted ARIA attributes
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Touch targets have sufficient size and spacing.
The page contains a heading, skip link, or landmark region
`[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-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
`[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
`<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
Heading elements appear in a sequentially-descending order
`<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.
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
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.
81

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 / WarningSource
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
Uses HTTPS
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
No browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
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
100

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.

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
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`
robots.txt is valid

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

69
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
69
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.33 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.65 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

141 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.51 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

3.73 s

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

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

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.

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.

URLResource SizeEst 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.webp133.7 KiB106.6 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 KiB42.9 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.webp54.8 KiB42.2 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 KiB31.2 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.webp34.0 KiB27.1 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.webp32.3 KiB25.7 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 KiB25.0 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.webp32.7 KiB24.9 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 KiB24.8 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 KiB24.4 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.webp29.1 KiB23.2 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.webp28.8 KiB23.0 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 KiB22.2 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 KiB19.9 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.webp24.2 KiB19.3 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.webp24.1 KiB19.2 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 KiB17.5 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.webp24.3 KiB16.9 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.webp20.5 KiB16.3 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 KiB15.8 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.webp19.1 KiB15.3 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.webp18.7 KiB14.9 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.webp18.2 KiB14.5 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 KiB13.5 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 KiB12.7 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.webp16.7 KiB12.5 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.webp14.4 KiB12.1 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.webp14.2 KiB11.3 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 KiB11.1 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.webp13.2 KiB10.5 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.webp11.9 KiB9.5 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.webp11.8 KiB9.4 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.webp12.0 KiB9.2 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.webp12.2 KiB9.2 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.webp10.9 KiB8.7 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.webp10.8 KiB8.6 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.webp10.4 KiB8.3 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.webp9.4 KiB7.5 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.webp8.8 KiB7.0 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.webp8.2 KiB6.6 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.webp7.3 KiB5.9 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.avif5.4 KiB5.3 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.webp6.3 KiB5.0 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.webp6.2 KiB5.0 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.webp5.5 KiB4.4 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' &amp;&amp; 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.

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
URLTime 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
URLTime 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

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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 120 ms 127.1 KiB
URLTransfer SizeEst Savings
s1.hdslb.com/bfs/static/shanks/laputa-home/assets/index-a1cbe777.js355.3 KiB127.1 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.

CategoryTime Spent
Script Evaluation1.2 s
Other778 ms
Style & Layout230 ms
Script Parsing & Compilation40 ms
Parse HTML & CSS34 ms
Rendering33 ms
Garbage Collection30 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 reasonFailure 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
登录 登录后你可以: 免费看高清视频 多端同步播放记录 发表弹幕/评论 热门番剧影视看不停 立即登录 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 / WarningSource
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
Unload event listeners are deprecated and will be removed.

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
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`

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