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Audit Complete

Results for https://jianshu.com

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Netherlands Netherlands · Amsterdam Completed: Apr 21, 2026 22:50 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)
D66

Site Health

Score: 66 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Major barriers for users with disabilities — up to 15% of your audience.

Solid SEO basics — a few optimizations could boost rankings.

Good server performance with room for optimization.

Mostly compliant — a few items need attention.

Missing metadata means poor previews on social media and search.

Reasonable footprint with room for optimization.

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

Babel · 59 peers
You 66
·
Avg 71
At average
0 50 100
Better than 8% of Babel sites See full Babel benchmark →
Bootstrap · 468 peers
You 66
·
Avg 73
-7 below average
0 50 100

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 button(s) with no accessible text

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

Accessibility › Link & Button Quality
5

6 image-in-link without alt text

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

Accessibility › Alt Text 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.

Conversion Barriers

4 critical 8 warning

12 barrier(s) likely increasing bounce by ~37%.

Speed (2)

Page takes 9.7s to load

+12% bounce

Users abandon at ~3s — you're 7.2s over the 2.5s threshold

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

Page feels frozen for 1.7s

+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 (2)

Severe layout shift during page load

+6% bounce

Users mis-click when content jumps — converting intent into frustration

Fix: Reserve space for images, ads, and embeds with explicit width/height

Viewport disables user zoom

+2% bounce

Visitors with low vision can't read the page — and some jurisdictions treat this as a legal risk

Fix: Remove user-scalable=no; drop maximum-scale if it's below 2

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 (3)

9 link(s) with generic text ("click here", "read more")

+1% bounce

Screen-reader users navigating by link list see no context — and search engines can't infer relevance

Fix: Rewrite with descriptive phrases that identify the destination

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

44 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 → ¥21,623/month returns + CNY 50,000,000 risk avoided

Payback period: < 1 month First-year ROI: +16375%

Investment

¥1,575

4h · 5 findings

Monthly returns

¥21,623 /mo

~¥259,475 / year

  • Conversions recovered ¥21,619
  • Bandwidth savings ¥3.70

Regulatory risk avoided

CNY 50,000,000

if kept compliant

  • PIPL CNY 50,000,000

Payback period

0 12mo 24mo

¥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

¥4,166,670 / month at risk

~¥50,000,044 / 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

¥3.70 /mo

6474.8 MB/mo × 0.571 CNY/GB

  • Optimize transfer: save ~647 KB per page load
    Saves ¥3.70/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.

9
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
64
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

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

4.10 s

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

9.73 s

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

1.69 s

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

0.578

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

13.08 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.

16.87 s

Detailed Report

Audit breakdown by category with detailed findings.

9

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.577723] map[node:map[boundingRect:map[bottom:2176 height:1851 left:18 right:394 top:325 width:376] lhId:page-8-DIV nodeLabel:专利法|著录项目变更(专题十二)8.1 非原创 著录项目(即著录事项)包括: 申请号、申请日、发明创造名称、分类号、优先权事项、申请人或者专利权人事项、发.… path:1,HTML,1,BODY,15,DIV,0,SECTION,1,DIV,1,DIV,3,DIV selector:section#layout-default > div.main-view > div#homepage > div.flow-list-container snippet:<div data-v-12a84da0="" class="flow-list-container"> type:node] score:0.577711] map[node:map[boundingRect:map[bottom:85 height:23 left:347 right:394 top:62 width:47] lhId:page-7-SPAN nodeLabel:换一批 path:1,HTML,1,BODY,15,DIV,0,SECTION,1,DIV,1,DIV,0,DIV,0,DIV,1,SPAN selector:div#homepage > div#collection-recommended > div.top-title > span.collection-change snippet:<span class="collection-change" data-v-12a84da0=""> type:node] score:1.2e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:45 height:42 left:18 right:60 top:3 width:42] lhId:page-12-IMG nodeLabel:logo path:1,HTML,1,BODY,15,DIV,0,SECTION,0,DIV,0,HEADER,0,DIV,0,IMG selector:div.header-wrap > header#jianshu-header > div.logo-wrap > img.logo snippet:<img src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNTAwIiBoZWlnaHQ9IjUwMCIgeG1sbnM9…" alt="logo" class="logo" data-v-f8617f56=""> type:node]] map[cause:Web font extra:map[type:url value:https://at.alicdn.com/t/font_189105_ztcop1wmq2.woff2?t=1640246256872]]] type:subitems]]]

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:30.331 source:map[column:47385 line:0 type:source-location url:https://cdn2.jianshu.io/asimov/app.c58e14d7c999855ad87f.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
摄影 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
lupic.cdn.bcebos.com/2025102514/3100908387_18.jpeg34.2 KiB23.3 KiB
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/930948-fd8563ad8fb25c94.jpg?imageMogr2/aut...23.2 KiB22.7 KiB
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/1352014-a5b373602504aa50.png?imageMogr2/au...12.3 KiB11.0 KiB
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/29636896-5888a582c06ba943.png?imageMogr2/a...11.7 KiB10.7 KiB
div.main-view > div#homepage > div.notice-z > img.notice-z-img div.main-view > div#homepage > div.notice-z > img.notice-z-img
cdn2.jianshu.io/asimov/src/assets/image/download/gg.905d1a32.png14.3 KiB8.8 KiB
section#layout-default > footer#footer > div.download-guide > ::after section#layout-default > footer#footer > div.download-guide > ::after
cdn2.jianshu.io/asimov/src/assets/image/download-guide.1cef6fa3.png60.8 KiB6.9 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2606.1440002441404 label:Time to first byte subpart:timeToFirstByte] map[duration:1327.1909997558594 label:Resource load delay subpart:resourceLoadDelay] map[duration:11.798 label:Resource load duration subpart:resourceLoadDuration] map[duration:69.481 label:Element render delay subpart:elementRenderDelay]]
lhId: page-6-DIV
nodeLabel: 下载简书,随时随地看好文
path: 1,HTML,1,BODY,15,DIV,0,SECTION,2,FOOTER,1,DIV
selector: div#app > section#layout-default > footer#footer > div.download-guide
snippet: <div class="download-guide">

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-6-DIV
nodeLabel: 下载简书,随时随地看好文
path: 1,HTML,1,BODY,15,DIV,0,SECTION,2,FOOTER,1,DIV
selector: div#app > section#layout-default > footer#footer > div.download-guide
snippet: <div class="download-guide">

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

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
qzs.gdtimg.com/union/res/union_sdk/page/h5_sdk/i.js0.0 ms359.8 KiB
c.69mok.com/js/finger.js0.0 ms33.8 KiB
c.69mok.com/js/hyapialltw.js0.0 ms31.0 KiB
udiab1.jianshu.com/source/soqu/static/u-qu/n-q/w.js14400.0 s38.6 KiB
udiab1.jianshu.com/lhjnov.js14400.0 s38.6 KiB
lupic.cdn.bcebos.com/2025102514/3100908398_14.jpeg143380.0 s74.6 KiB
/upload_images/930948-fd8563ad8fb25c94.jpg?imageMogr2/aut...0.0 ms23.5 KiB
lupic.cdn.bcebos.com/2025102514/3100908386_14.jpeg105912.0 s53.4 KiB
lupic.cdn.bcebos.com/2025102514/3100908394_14.jpeg95569.0 s47.3 KiB
/upload_images/1352014-a5b373602504aa50.png?imageMogr2/au...0.0 ms12.8 KiB
lupic.cdn.bcebos.com/2025102514/3100908387_18.jpeg120627.0 s34.8 KiB
udiab1.jianshu.com/js/logo/js/logo.js14400.0 s6.4 KiB
udiab1.jianshu.com/dhebfgn.js14400.0 s4.2 KiB
s.ddgjjj.com/zyj0366.js0.0 ms2.3 KiB
lupic.cdn.bcebos.com/static/wap_insert_screen_finger.png132425.0 s6.1 KiB
udiab1.jianshu.com/production/fa_zcbj_w_g/static/j.js14400.0 s2.0 KiB
lupic.cdn.bcebos.com/static/wap_insert_screen_circle.png48841.0 s2.7 KiB
udiab1.jianshu.com/common/g/openjs/bc-h-hyc/resource/kd.js14400.0 s1.9 KiB
c.69mok.com/js/hyhot.js0.0 ms1.2 KiB
udiab1.jianshu.com/js/logo/css/logo-sm.css14400.0 s1011 B
udiab1.jianshu.com/js/time2.js14400.0 s764 B
/adx.php?c=d25pZD0xY2JhYzJjNjEzMmFkMDY4AHM9MWNiYWMyYzYxMz...0.0 ms464 B
/adx.php?c=d25pZD0zMjkwOTM5ZDExMjg4Y2M3AHM9MzI5MDkzOWQxMT...0.0 ms464 B
/s.php?c=d25pZD0xY2JhYzJjNjEzMmFkMDY4AHdpbl9kc3A9NAB0dT11...0.0 ms464 B
cpro.baidustatic.com/cpro/ui/pr.js3600.0 s486 B
v1.cnzz.com/z_stat.php?id=127980795790.0 s369 B
zz.bdstatic.com/linksubmit/push.js86400.0 s552 B
sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCKT-xh_/s.gif?l=https://www.jianshu.com/0.0 ms116 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms58 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
/sa.gif?project=jianshu&data=eyJkaXN0aW5jdF9pZCI6IjE5ZGIy...0.0 ms57 B
udiab1.jianshu.com/js/logo/js/logo.js14400.0 s0 B
udiab1.jianshu.com/js/logo/css/logo-sm.css14400.0 s0 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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: 1.2 s
URLTime Spent
jianshu.com/1.2 s
www.jianshu.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: 1.4 s
URLTime Spent
www.jianshu.com/1.5 s

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
专利法|著录项目变更(专题十二)8.1 非原创 著录项目(即著录事项)包括: 申请号、申请日、发明创造名称、分类号、优先权事项、申请人或者专利权人事项、发.… section#layout-default > div.main-view > div#homepage > div.flow-list-container
0.578
换一批 div#homepage > div#collection-recommended > div.top-title > span.collection-change
0.000

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused 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 Evaluation2.4 s
Other946 ms
Script Parsing & Compilation658 ms
Style & Layout535 ms
Garbage Collection171 ms
Rendering121 ms
Parse HTML & CSS38 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 did not finish loading before navigating away.Not actionable

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.main-view > div#homepage > div.notice-z > img.notice-z-img div.main-view > div#homepage > div.notice-z > img.notice-z-img
cdn2.jianshu.io/asimov/src/assets/image/download/gg.905d1a32.png

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

Optimize DOM size
Modern HTTP
Optimize viewport for mobile
Minify CSS
Minify JavaScript
Reduce unused CSS
Avoids enormous network payloads Total size was 2,108 KiB
Avoid long main-thread tasks 10 long tasks found
Network Requests
Network Round Trip Times 240 ms
Server Backend Latencies 990 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
INP breakdown
User Timing marks and measures
Avoid non-composited animations
64

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
lwa-ad-one div.flow-list-container > ul.flow-list-ul > div > div.hierarchy-29x2I_0
baidu-ad div.flow-list-container > ul.flow-list-ul > div > div.transleft-WjF9Z_0
gdt-ad section#layout-default > div.main-view > div#homepage > div#x1tntzbunz

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

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
立即下载 div.header-wrap > header#jianshu-header > div.header-download > button
换一批 div#homepage > div#collection-recommended > div.top-title > span.collection-change
摄影 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
读书 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
@IT·互联网 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
手绘 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
故事 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
旅行·在路上 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
自然科普 div#homepage > div#collection-recommended > div.recommend-collection > span.tag
摄影 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
读书 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
@IT·互联网 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
手绘 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
故事 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
旅行·在路上 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
自然科普 div#homepage > div#collection-recommended > div.recommend-collection > a.tag
非原创 著录项目(即著录事项)包括: 申请号、申请日、发明创造名称、分类号、优先权事项、申请人或者专利权人事项、发... li.note-flow > content.content > div.summary > p.abstract
3.058 div > li.note-flow > div.meta > span
静静朵朵开 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
人生最不怕的事是积累 如果上一年做的事不能成为下一年的阶梯,上五年做的事儿不能成为下五年的基石,如此蹉跎十年,基本... li.note-flow > content.content > div.summary > p.abstract
6.375 div > li.note-flow > div.meta > span
诗与阳光 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
20260414【新员工系列】 “我希望在这家公司成长为什么样的人?”——这个问题看似宏大,却恰恰是新员工最应尽早... li.note-flow > content.content > div.summary > p.abstract
生涯规划与人才发展四金儿 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
大前天晚上,我写了一篇文章,发布在了自媒体平台上。 这篇文章,在头条上数据很好,到今天有三万多阅读,收入15块多;... li.note-flow > content.content > div.summary > p.abstract
115.794 div > li.note-flow > div.meta > span
若林之域 div > li.note-flow > div.meta > span.name
131 div > li.note-flow > div.meta > span
789 div > li.note-flow > div.meta > span
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
swift 在工程中可以通过桥接文件使用OC代码,但是在framework中是不支持使用桥接文件的,下面是是swi... li.note-flow > content.content > div.summary > p.abstract
2.824 div > li.note-flow > div.meta > span
尼古拉斯超仔 div > li.note-flow > div.meta > span.name
14 div > li.note-flow > div.meta > span
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
嗡——! 一道道湛蓝色的能量屏障从地面飞速升起,将整个擂台空间彻底封锁,屏障之上流转着细密的电光,隔绝一切外部干预... li.note-flow > content.content > div.summary > p.abstract
数星羊 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
最近面临一些职业选择,然后就有一些想法跟大家分享。 作为在临床试验行业工作6年多的小角色一枚,经历了这个行业从辉煌... li.note-flow > content.content > div.summary > p.abstract
林芷文的日常碎碎念 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
说故事总在美化人间,这个感受特别敏锐。我们看到的那些广为流传的故事,大多把世界修得温柔又圆满,其实本质上,是在用虚... li.note-flow > content.content > div.summary > p.abstract
好运杠精 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
儿子对酸奶的偏爱,或是去超市买水的念头,从来都带着一份雷打不动的坚持——每次开口,都要两瓶,一瓶一定要我也喝,我不... li.note-flow > content.content > div.summary > p.abstract
关业友合 div > li.note-flow > div.meta > span.name
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
点击以下链接,可以观看视频。 https://v.ixigua.com/MXsFWAT/23个声母的读音/[htt... li.note-flow > content.content > div.summary > p.abstract
29.763 div > li.note-flow > div.meta > span
生命中最美的是成长 div > li.note-flow > div.meta > span.name
42 div > li.note-flow > div.meta > span
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
用于本地资源检测,帮助开发者尽早发现资源文件中存在的问题 支持所有版本的Unity项目 不依赖Unity Edit... li.note-flow > content.content > div.summary > p.abstract
5.099 div > li.note-flow > div.meta > span
忆中异 div > li.note-flow > div.meta > span.name
30 div > li.note-flow > div.meta > span
打开APP阅读 div > li.note-flow > div.meta > span.note__flow__download
展开更多文章 div#homepage > div.flow-list-container > div > div.flow-list-placeholder-load-more

These are opportunities to improve the legibility of your content.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body.reader-day-mode > div > img body.reader-day-mode > div > img
div.main-view > div#homepage > div.notice-z > img.notice-z-img div.main-view > div#homepage > div.notice-z > img.notice-z-img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body.reader-day-mode > div > iframe body.reader-day-mode > div > iframe
div > div.transleft-WjF9Z_0 > div > iframe div > div.transleft-WjF9Z_0 > div > iframe
body.reader-day-mode > div > iframe#msg7466031745387959 body.reader-day-mode > div > iframe#msg7466031745387959

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
专利法|著录项目变更(专题十二)8.1 非原创 著录项目(即著录事项)包括: 申请号、申请日、发明创造名称、分类号、优先权事项、申请人或者专利权人事项、发.… div.main-view > div#homepage > div.flow-list-container > ul.flow-list-ul

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
专利法|著录项目变更(专题十二)8.1 非原创 著录项目(即著录事项)包括: 申请号、申请日、发明创造名称、分类号、优先权事项、申请人或者专利权人事项、发.… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
101.人生最不怕的事是积累 人生最不怕的事是积累 如果上一年做的事不能成为下一年的阶梯,上五年做的事儿不能成为下五年的基石,如此蹉跎十年,基本... 6… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
48长期愿景:我希望在这家公司成长为什么样的人?这个岗位如何帮助我实现它? 20260414【新员工系列】 “我希望在这家公司成长为什么样的人?”——这个问… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
挣了30块 大前天晚上,我写了一篇文章,发布在了自媒体平台上。 这篇文章,在头条上数据很好,到今天有三万多阅读,收入15块多;... 115.794若林之… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
swift framework 使用 OC 代码 swift 在工程中可以通过桥接文件使用OC代码,但是在framework中是不支持使用桥接文件的,下面是… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
第二季第三百零一章 死战绝境 嗡——! 一道道湛蓝色的能量屏障从地面飞速升起,将整个擂台空间彻底封锁,屏障之上流转着细密的电光,隔绝一切外部干预... 0… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
碎念109:毕业后的第一份工作,基本决定了你未来的职业发展 最近面临一些职业选择,然后就有一些想法跟大家分享。 作为在临床试验行业工作6年多的小角色一枚,经… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
为什么故事总在美化人间? 说故事总在美化人间,这个感受特别敏锐。我们看到的那些广为流传的故事,大多把世界修得温柔又圆满,其实本质上,是在用虚... 0好运… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
两瓶的牵挂 儿子对酸奶的偏爱,或是去超市买水的念头,从来都带着一份雷打不动的坚持——每次开口,都要两瓶,一瓶一定要我也喝,我不... 0关业友合 0 0… div.flow-list-container > ul.flow-list-ul > div > li.note-flow
汉语拼音2:学习23个声母的读音 点击以下链接,可以观看视频。 https://v.ixigua.com/MXsFWAT/23个声母的读音/[htt... … div.flow-list-container > ul.flow-list-ul > div > li.note-flow
Unity资源检测(Asset Checker)工具 用于本地资源检测,帮助开发者尽早发现资源文件中存在的问题 支持所有版本的Unity项目 不依赖Unit… div.flow-list-container > ul.flow-list-ul > div > li.note-flow

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

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
ARIA attributes are used as specified for the element's role
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
Touch targets have sufficient size and spacing.
Heading elements appear in a sequentially-descending order
Document has a main landmark.
`[accesskey]` values are unique
`button`, `link`, and `menuitem` elements have accessible names
Deprecated ARIA roles were not used
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
`[aria-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
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
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Form elements have associated labels
Links are distinguishable without relying on color.
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Skip links are focusable.
No element has a `[tabindex]` value greater than 0
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`[lang]` attributes have a valid value
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Identical links have the same purpose.
Elements with visible text labels have matching accessible names.
Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
`<td>` elements in a large `<table>` have one or more table headers.
73

Best Practices

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URLRequest Resolution
homepageAllowed

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/930948-fd8563ad8fb25c94.jpg?imageMogr2/aut...80 x 80 (1.00)1500 x 693 (2.16)
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/29636896-5888a582c06ba943.png?imageMogr2/a...80 x 80 (1.00)419 x 553 (0.76)
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
/upload_images/1352014-a5b373602504aa50.png?imageMogr2/au...80 x 80 (1.00)524 x 352 (1.49)

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLDisplayed sizeActual sizeExpected size
div.main-view > div#homepage > div.notice-z > img.notice-z-img div.main-view > div#homepage > div.notice-z > img.notice-z-img
cdn2.jianshu.io/asimov/src/assets/image/download/gg.905d1a32.png376 x 111339 x 100564 x 167
body.reader-day-mode > div > img body.reader-day-mode > div > img
28 x 2840 x 4042 x 42
Avoids deprecated APIs
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Page has the HTML doctype
Properly defines charset
No browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Page has valid source maps
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
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
body.reader-day-mode > div > img body.reader-day-mode > div > img
div.main-view > div#homepage > div.notice-z > img.notice-z-img div.main-view > div#homepage > div.notice-z > img.notice-z-img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > img
li.note-flow > content.content > span.wrap-img > img li.note-flow > content.content > span.wrap-img > 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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

80
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
63
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.
83
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.

1.70 s

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

1.97 s

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

32 ms

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

0.032

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.

2.28 s

Detailed Report

Audit breakdown by category with detailed findings.

80

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.

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: 50
path: 6,HTML,6,BODY,3,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG
selector: div.item > div.banner > a > img
snippet: <img src="https://upload.jianshu.io/admin_banners/web_images/5095/298f10ac22cee558ae…" alt="50">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
lupic.cdn.bcebos.com/2025072214/3100034934_14.jpeg87.5 KiB85.3 KiB
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
lupic.cdn.bcebos.com/2025071614/3099957258_14.jpeg74.4 KiB72.5 KiB
50 div.item > div.banner > a > img
/admin_banners/web_images/5095/298f10ac22cee558aee845e75f...33.3 KiB24.0 KiB
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
lupic.cdn.bcebos.com/20220708/3087015167_14_600_416.jpg18.2 KiB16.8 KiB
50 div.col-xs-16 > div#indexCarousel > div.carousel-inner > div.item
lupic.cdn.bcebos.com/20220708/3086991179_14_600_420.jpg11.6 KiB10.7 KiB
Resize,w 360,h 240 ul.note-list > li#note-110476368 > a.wrap-img > img.img-blur-done
/upload_images/20896689-b9e0bd384027e33c.png?x-oss-proces...8.2 KiB7.7 KiB

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

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: 0.0 ms 29.4 KiB
URLTransfer SizeEst Savings
cdn2.jianshu.io/assets/web-c0324e28cae6040f85e9.css31.2 KiB29.4 KiB

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

Why this matters

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: 80 ms 176.0 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.row > div.col-xs-17 > div.icp > img div.row > div.col-xs-17 > div.icp > img

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

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: 644 ms
URLTime Spent
jianshu.com/644 ms
www.jianshu.com/0.0 ms
Time to Interactive 2.3 s
Max Potential First Input Delay 110 ms
Layout shift culprits
Optimize DOM size
Forced reflow
LCP breakdown
Modern HTTP
Optimize viewport for mobile
Minify CSS
Minify JavaScript
Avoids enormous network payloads Total size was 683 KiB
JavaScript execution time 0.2 s
Minimizes main-thread work 0.6 s
Avoid long main-thread tasks 1 long task found
Network Requests
Network Round Trip Times 240 ms
Server Backend Latencies 780 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 300 ms
Avoid large layout shifts 4 layout shifts found
INP breakdown
User Timing marks and measures
Avoid non-composited animations
63

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
baidu-ad div.col-xs-16 > div#list-container > ul.note-list > div.commonclass
baidu-ad div.container > div.row > div.col-xs-7 > div.commonclass

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

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
写文章 body.reader-black-font > nav.navbar > div.width-limit > a.btn
注册 body.reader-black-font > nav.navbar > div.width-limit > a#sign_up
登录 body.reader-black-font > nav.navbar > div.width-limit > a#sign_in
首页 ul.nav > li.tab > a > span.menu-text
1.Jenkins安装或确认必要插件 jenkins安装或确认必要插件gitlab、Publish Over SSH。Dashboard--Ma... ul.note-list > li#note-110476368 > div.content > p.abstract
3.0 li#note-110476368 > div.content > div.meta > span.jsd-meta
負笈在线 li#note-110476368 > div.content > div.meta > a.nickname
20 li#note-110476368 > div.content > div.meta > span
一起经营了十几年的感情,和平分开后,好像再也走不近了,不知道为什么? 他的手想牵我的手,我的手会下意识的回避 他的胳膊想搭在我的肩膀,我会有不适... ul.note-list > li#note-136785314 > div.content > p.abstract
1.7 li#note-136785314 > div.content > div.meta > span.jsd-meta
欢喜中的寂静 li#note-136785314 > div.content > div.meta > a.nickname
在选择就业培训学校时,如何确保所选学校能够真正满足个人职业发展需求并实现稳定就业?本文将为您提供一套系统的选型标准,并以沈阳禾众职业技能培训学校... ul.note-list > li#note-136638351 > div.content > p.abstract
电厂就业指导 li#note-136638351 > div.content > div.meta > a.nickname
随时随地发现和创作内容 div.col-xs-7 > a#index-aside-download-qrbox > div.info > div.description
关于简书 footer.container > div.row > div.col-xs-17 > a
联系我们 footer.container > div.row > div.col-xs-17 > a
加入我们 footer.container > div.row > div.col-xs-17 > a
简书出版 footer.container > div.row > div.col-xs-17 > a
品牌与徽标 footer.container > div.row > div.col-xs-17 > a
帮助中心 footer.container > div.row > div.col-xs-17 > a
合作伙伴 footer.container > div.row > div.col-xs-17 > a
举报 footer.container > div.row > div.col-xs-17 > a
©2012-2026 北京简书信息科技有限公司 / 简书 / 京ICP备2026002221号 / 京公网安备11010502059420号 简书网举报邮… footer.container > div.row > div.col-xs-17 > div.icp
京ICP备2026002221号 / div.row > div.col-xs-17 > div.icp > a
京公网安备11010502059420号 div.row > div.col-xs-17 > div.icp > a

These are opportunities to improve the legibility of your content.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nav.navbar > div.width-limit > a.logo > img nav.navbar > div.width-limit > a.logo > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-17 > div.icp > a > img div.col-xs-17 > div.icp > a > img
div.row > div.col-xs-17 > div.icp > img div.row > div.col-xs-17 > div.icp > img

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul.note-list > div.commonclass > div#_u6870215_pzca10oo3u > iframe#iframeu6870215_0 ul.note-list > div.commonclass > div#_u6870215_pzca10oo3u > iframe#iframeu6870215_0
div.col-xs-7 > div.commonclass > div#_u6870225_tf7bdf1bdp > iframe#iframeu6870225_0 div.col-xs-7 > div.commonclass > div#_u6870225_tf7bdf1bdp > iframe#iframeu6870225_0

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
body.reader-black-font > nav.navbar > div.width-limit > a.logo body.reader-black-font > nav.navbar > div.width-limit > a.logo
ul.nav > li.search > form > a.search-btn ul.nav > li.search > form > a.search-btn
div.row > div.col-xs-7 > div.board > a
div.row > div.col-xs-7 > div.board > a
div.row > div.col-xs-7 > div.board > a
div.row > div.col-xs-7 > div.board > a div.row > div.col-xs-7 > div.board > a
div.row > div.col-xs-17 > div.icp > a div.row > div.col-xs-17 > div.icp > a

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.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These are opportunities to improve the interpretation of your content by users in different locales.

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
20230308--Jenkins+Gogs自动远程Docker环境部署django项目 1.Jenkins安装或确认必要插件 jenkins安装或确认必要… div.row > div.col-xs-16 > div#list-container > ul.note-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>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Form elements have associated labels
ARIA attributes are used as specified for the element's role
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
Touch targets have sufficient size and spacing.
`[lang]` attributes have a valid value
Heading elements appear in a sequentially-descending order
Deprecated ARIA roles were not used
Identical links have the same purpose.
`[accesskey]` values are unique
`button`, `link`, and `menuitem` elements have accessible names
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
`[aria-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 with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[role]`s are contained by their required parent element
Elements with the `role=text` attribute do not have focusable descendents.
ARIA toggle fields have accessible names
ARIA `tooltip` elements have accessible names
ARIA `treeitem` elements have accessible names
Buttons have an accessible name
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
`<html>` element has a valid value for its `[lang]` attribute
`<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">`
`<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.
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Elements with visible text labels have matching accessible names.
Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
50 div.item > div.banner > a > img
/admin_banners/web_images/5095/298f10ac22cee558aee845e75f...625 x 270 (2.31)1200 x 501 (2.40)
Resize,w 360,h 240 ul.note-list > li#note-110476368 > a.wrap-img > img.img-blur-done
/upload_images/20896689-b9e0bd384027e33c.png?x-oss-proces...148 x 98 (1.51)580 x 442 (1.31)

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
Unload event listeners are deprecated and will be removed.
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
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
No browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Page has valid source maps
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
83

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
nav.navbar > div.width-limit > div.style-mode > a.style-mode-btn nav.navbar > div.width-limit > div.style-mode > a.style-mode-btn
div.style-mode > div.popover-modal > div.switch > a.switch-btn
div.style-mode > div.popover-modal > div.switch > a.switch-btn
宋体 div.style-mode > div.popover-modal > div.switch > a.switch-btn
黑体 div.style-mode > div.popover-modal > div.switch > a.switch-btn
div.style-mode > div.popover-modal > div.switch > a.switch-btn
div.style-mode > div.popover-modal > div.switch > a.switch-btn

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
nav.navbar > div.width-limit > a.logo > img nav.navbar > div.width-limit > a.logo > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-7 > div.board > a > img div.col-xs-7 > div.board > a > img
div.col-xs-17 > div.icp > a > img div.col-xs-17 > div.icp > a > img
div.row > div.col-xs-17 > div.icp > img div.row > div.col-xs-17 > div.icp > 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
robots.txt is valid
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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