D — https://pconline.com.cn | BeaverCheck Audit

Site Health

Score: 69 / 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.

Well-optimized for search — your content is discoverable.

Good server performance with room for optimization.

Mostly compliant — a few items need attention.

Good content signals with minor gaps.

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

Google Search Console · 3223 peers

You 69

Avg 73

At average

0 50 100

Better than 8% of Google Search Console sites See full Google Search Console benchmark →

jQuery · 1538 peers

You 69

Avg 73

At average

0 50 100

Better than 7% of jQuery sites See full jQuery benchmark →

Top Priorities (5)

Content-Security-Policy header is missing

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

Security › Security Headers

HSTS header is missing

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

Security › Security Headers

No Content-Security-Policy header found

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

Security › Content Security Policy

1 button(s) with no accessible text

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

Accessibility › Link & Button Quality

1 control(s) without accessible label

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

Accessibility › Form Accessibility

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fpconline.com.cn)](https://beavercheck.com/results/a4ecbf42-a987-4439-a6a9-e8a58be86099)

HTML

<a href="https://beavercheck.com/results/a4ecbf42-a987-4439-a6a9-e8a58be86099"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fpconline.com.cn" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fpconline.com.cn

This badge auto-updates with your latest scan result.

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.

Could reach Estimate based on resolving critical issues

Conversion Barriers

1 critical 6 warning

7 barrier(s) likely increasing bounce by ~24%.

Speed (1)

Page takes 9.9s to load

+12% bounce

Users abandon at ~3s — you're 7.4s over the 2.5s threshold

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

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)

1 form field(s) without a label

+2% bounce

Screen readers skip unlabeled fields; autofill can't identify them; checkout abandonment spikes

Fix: Associate every input with a visible <label for="…">; add autocomplete attributes

Content (1)

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, …)

Navigation (2)

15 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

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

Return on Investment

¥1,575 investment → ¥20,855/month returns + CNY 50,000,000 risk avoided

Payback period: < 1 month First-year ROI: +15789%

Investment

¥1,575

4h · 5 findings

Monthly returns

¥20,855 /mo

~¥250,256 / year

Conversions recovered ¥20,849
Bandwidth savings ¥5.34

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

Custom rate

¥ /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

~¥50,000,064 / 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

Bandwidth Waste

¥5.34 /mo

9347.2 MB/mo × 0.571 CNY/GB

Optimize transfer: save ~935 KB per page load
Saves ¥5.34/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

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

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.

Performance

Accessibility

Best Practices

SEO

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.

7.62 s

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

9.92 s

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

9 ms

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.

7.62 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.

10.25 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
www1.pconline.com.cn/sale/2026/images/0306/banner.png	86400.0 s	67.1 KiB
www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpg	86400.0 s	66.1 KiB
www1.pconline.com.cn/cms/gz20240115/wap/home/images/popup-bg.png	86400.0 s	43.8 KiB
www1.pconline.com.cn/cms/gz20240115/wap/home/images/popup-logo.png	86400.0 s	43.1 KiB
www1.pconline.com.cn/cms/2025/wap/1128/pconline-logo.webp	900.0 s	11.1 KiB
www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.png	86400.0 s	23.2 KiB
www1.pconline.com.cn/2018/wap/art/images/icons.png	86400.0 s	21.6 KiB
www1.pconline.com.cn/2023/home/wap/images/rankbg.png	86400.0 s	16.5 KiB
www1.pconline.com.cn/2023/cms/home/images/placeholder.png	86400.0 s	16.2 KiB
www1.pconline.com.cn/2022/common/swiper/swiper-bundle.min.css	900.0 s	4.7 KiB
www1.pconline.com.cn/cms/home/2025/images/0927/ico-video-play.webp	900.0 s	4.6 KiB
js.3conline.com/pconlinenew/data/wap/2024/cms/home/css/index.min.css?t=20250927	3600.0 s	4.8 KiB
/adpuba/online_test_show?id=pc.sy.test15.&media=js&channe...	0.0 ms	3.4 KiB
js.3conline.com/pconlinenew/data/common/wakeup/floatingLlayerPop.js	3600.0 s	4.2 KiB
www1.pcauto.com.cn/zt/gz20220126/wap/index/img/half-close-circle.png	3600.0 s	4.2 KiB
www.pconline.com.cn/_hux_/index.js	900.0 s	3.7 KiB
www.pconline.com.cn/_hux_/online/default/index.js	900.0 s	3.7 KiB
www1.pconline.com.cn/cms/home/wap/2025/images/0927/lable-yuanchuang.webp	900.0 s	3.5 KiB
js.3conline.com/pconlinenew/data/common/wakeup/floatEnum.js	3600.0 s	3.4 KiB
js.3conline.com/pconlinenew/data/common/wakeup/utils.js	3600.0 s	3.3 KiB
www1.pconline.com.cn/2023/home/wap/images/navIcon1.png	86400.0 s	6.3 KiB
www1.pconline.com.cn/2023/home/wap/images/navIcon4.png	86400.0 s	6.0 KiB
www1.pconline.com.cn/2023/home/wap/images/navIcon3.png	86400.0 s	5.5 KiB
www1.pconline.com.cn/2023/home/wap/images/navIcon2.png	86400.0 s	5.4 KiB
www1.pconline.com.cn/2023/home/wap/images/navIcon5.png	86400.0 s	5.2 KiB
www1.pconline.com.cn/2023/home/wap/images/bdTit.png	86400.0 s	5.0 KiB
www1.pconline.com.cn/ai/2025/wap/images/logo/1128/ico-logo-wap-2025.webp	900.0 s	2.0 KiB
www1.pconline.com.cn/2023/home/wap/images/top2.png	86400.0 s	4.3 KiB
www1.pconline.com.cn/2023/home/wap/images/top3.png	86400.0 s	4.2 KiB
www1.pconline.com.cn/cms/home/20241220/images/nav_gxcpr.png	86400.0 s	4.1 KiB
www1.pconline.com.cn/2023/home/wap/images/top1.png	86400.0 s	4.1 KiB
www1.pconline.com.cn/2023/home/wap/images/kuaixun.png	86400.0 s	4.1 KiB
js.3conline.com/pconlinenew/data/wap/2023/cms/js/headerTop.js?kd	3600.0 s	1.9 KiB
www1.pconline.com.cn/cms/gz20240115/wap/home/images/header-top-download.png	86400.0 s	3.8 KiB
js.3conline.com/pconlinenew/data/wap/2024/cms/home/js/index.js	3600.0 s	1.8 KiB
/pconlinenew/data/wap/2025/cms/js/wap_pageStepNavigation....	3600.0 s	1.6 KiB
/adpuba/online_default_show?id=pc.wap.test15.&media=js&ch...	0.0 ms	1.2 KiB
js.3conline.com/wap/common/wxApi-ForShare.min.js	3600.0 s	1.2 KiB
www1.pconline.com.cn/2024/wap/home/subnav/images/home-subname-ai.png	86400.0 s	2.2 KiB
www1.pconline.com.cn/2023/home/wap/images/userIcon.png	86400.0 s	1.9 KiB
/s.gif?url=https%3A%2F%2Fg.pconline.com.cn%2F&token=8568a...	0.0 ms	698 B
www1.pconline.com.cn/2018/wap/common/footer/images/PCauto.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/2024/wap/home/subnav/images/home-subname-zhizao.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/2023/home/wap/images/searchIcon.png	86400.0 s	1005 B
www1.pconline.com.cn/cms/gz20240115/wap/home/images/app-close-btn.png	86400.0 s	821 B
www1.pconline.com.cn/2023/home/wap/images/navsIcon.png	86400.0 s	703 B
www1.pconline.com.cn/2023/home/wap/images/rightIcon.png	86400.0 s	648 B
www1.pconline.com.cn/2023/home/wap/images/rightIcon2.png	86400.0 s	627 B
/adpuba/show?id=pc.wap.sy.test15.&media=js&channel=inline...	0.0 ms	156 B
www1.pconline.com.cn/images/blank.gif	86400.0 s	360 B
/adpuba/show?id=pc.wap.sy.dhxfwzl.&media=js&channel=inlin...	0.0 ms	67 B
/adpuba/show?id=pc.wap.sy.dbtl.&media=js&channel=inline&t...	0.0 ms	66 B
/adpuba/show?id=pc.wap.sy.dbwz1.&media=js&channel=inline&...	0.0 ms	66 B
/adpuba/show?id=pc.wap.sy.ycsdt.&media=js&channel=inline&...	0.0 ms	66 B
/adpuba/show?id=pc.wap.sy.pdxxl1.&media=js&channel=inline...	0.0 ms	66 B
/adpuba/show?id=pc.wap.sy.pdxxl2.&media=js&channel=inline...	0.0 ms	66 B
/adpuba/show?id=pc.wap.sy.pdxxl3.&media=js&channel=inline...	0.0 ms	66 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
影像红黑榜：口袋里的专业相机，pocket4重磅登场！ `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/digital/dc/2023/news/2604/20264/20/177668294803...	375.8 KiB	342.8 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260421/49828437.jpg?x-oss...	255.4 KiB	242.7 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260420/49792206.jpg?x-oss...	223.1 KiB	210.4 KiB
Alienware外星人游戏互动嘉年华：一场关于热爱的集体仪式 `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/notebook/nbnews/nbnews/2604/20264/21/1776777583...	201.7 KiB	168.6 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260421/49828644.jpg?x-oss...	174.8 KiB	162.1 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260420/49792306.jpg?x-oss...	170.0 KiB	157.2 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260417/49692465.jpg?x-oss...	165.0 KiB	152.3 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260421/49829099.jpg?x-oss...	118.7 KiB	106.0 KiB
机器人马拉松一战成名：荣耀的跨界之战为什么能成功？ `div.swiper-wrapper > div.swiper-slide > a.pic > img`	img0.pconline.com.cn/pconline/ai/2604/20264/21/17767656412737210.jpg	101.6 KiB	68.6 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260417/49692198.jpg?x-oss...	76.2 KiB	63.4 KiB
「鲜Phone画报」一加 Ace 6 至尊版｜硬核气场，玩家信仰 `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/picture/000145456/2604/20264/21/177675249277420...	73.1 KiB	43.1 KiB
div#home-bottom-half-dialog > div.bottom-half-dialog-content > div.bottom-half-openapp > img `div#home-bottom-half-dialog > div.bottom-half-dialog-content > div.bottom-half-openapp > img`	www1.pconline.com.cn/cms/gz20240115/wap/home/images/popup-logo.png	42.7 KiB	40.6 KiB
这下是真把哈苏装进口袋里了！OPPO Find X9 Ultra体验 `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/test/2023/focus/big/2604/20264/21/1776785648429...	68.1 KiB	35.1 KiB
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`	img0.pconline.com.cn/pconline/headphoto/2306/20236/1/16855857141292850.jpg	27.5 KiB	27.4 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20260410/49423683_sn8.png	31.9 KiB	27.0 KiB
手机+小平板太阔了，华为Pura X Max真机上手体验 `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/test/2023/focus/big/2604/20264/22/1776830346818...	58.5 KiB	25.5 KiB
灭霸再加码！vivo Y600 Pro续航耐用全都要 `div.swiper-wrapper > div.swiper-slide > a.pic > img`	img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768295836625150.jpg	58.2 KiB	25.2 KiB
REDMI K Pad 2 拆解：拒绝花哨，死磕实用性！ `div.swiper-wrapper > div.swiper-slide > a.pic > img`	/pconline/test/2023/focus/big/2604/20264/22/1776857664343...	53.9 KiB	20.8 KiB
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`	img0.pconline.com.cn/pconline/headphoto/2305/20235/17/16843133163445140.jpg	19.2 KiB	19.2 KiB
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`	/pconline/images/pconline_cms/20260420/49792797.jpg?x-oss...	31.6 KiB	18.9 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20250417/25412527_sn8.jpg	16.1 KiB	11.1 KiB
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`	img0.pconline.com.cn/pconline/headphoto/2305/20235/17/16843128880696270.jpg	9.3 KiB	9.1 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20250723/30597156_sn8.jpg	14.0 KiB	9.0 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20260323/48588598_sn8.jpg	14.0 KiB	9.0 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20260228/47464116_sn8.jpg	11.0 KiB	6.0 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20250306/24815118_sn8.jpg	10.9 KiB	6.0 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20260316/48203073_sn8.jpg	10.7 KiB	5.7 KiB
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`	img4.pconline.com.cn/pconline/images/product/20250915/34426142_sn8.jpg	10.4 KiB	5.4 KiB
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`	img0.pconline.com.cn/pconline/headphoto/2309/20239/28/16958675535358130.jpg	5.4 KiB	5.2 KiB
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`	www1.pconline.com.cn/2023/home/wap/images/navIcon1.png	5.9 KiB	5.2 KiB
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`	www1.pconline.com.cn/2023/home/wap/images/navIcon4.png	5.7 KiB	4.9 KiB
div.g-footer > div.pcgroups > a.pcauto > ::before `div.g-footer > div.pcgroups > a.pcauto > ::before`	www1.pconline.com.cn/2018/wap/art/images/icons.png	21.3 KiB	4.6 KiB
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`	www1.pconline.com.cn/2023/home/wap/images/navIcon3.png	5.2 KiB	4.5 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:1569.189 label:Time to first byte subpart:timeToFirstByte] map[duration:9.999 label:Resource load delay subpart:resourceLoadDelay] map[duration:2012.501 label:Resource load duration subpart:resourceLoadDuration] map[duration:9.485 label:Element render delay subpart:elementRenderDelay]]

lhId: page-16-IMG

nodeLabel: 灭霸再加码！vivo Y600 Pro续航耐用全都要

path: 1,HTML,1,BODY,8,DIV,8,DIV,0,DIV,1,DIV,0,A,0,IMG

selector: div.swiper-wrapper > div.swiper-slide > a.pic > img

snippet: <img src="//img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768295836625…" alt="灭霸再加码！vivo Y600 Pro续航耐用全都要">

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: 灭霸再加码！vivo Y600 Pro续航耐用全都要

path: 1,HTML,1,BODY,8,DIV,8,DIV,0,DIV,1,DIV,0,A,0,IMG

selector: div.swiper-wrapper > div.swiper-slide > a.pic > img

snippet: <img src="//img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768295836625…" alt="灭霸再加码！vivo Y600 Pro续航耐用全都要">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
/adpuba/show?id=pc.wap.sy.test15.&media=js&channel=inline...	156 B	1.4 s
/adpuba/show?id=pc.wap.sy.dbtl.&media=js&channel=inline&t...	66 B	351 ms
/adpuba/show?id=pc.wap.sy.dbwz1.&media=js&channel=inline&...	66 B
www.pconline.com.cn/_hux_/online/default/index.js	3.7 KiB
www1.pconline.com.cn/2022/common/swiper/swiper-bundle.min.css	4.7 KiB	1.0 s
js.3conline.com/pconlinenew/data/wap/2024/cms/home/css/index.min.css?t=20250927	4.8 KiB	1.1 s

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: 3.8 s

URL	Time Spent
pconline.com.cn/	1.5 s
www.pconline.com.cn/	2.3 s
g.pconline.com.cn/	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

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

Estimated savings: 190 ms 52.6 KiB

URL	Transfer Size	Est Savings
js.3conline.com/pconlinenew/data/2023/sensors/sensorsdata.min.js	31.2 KiB	28.5 KiB
js.3conline.com/min/temp/v1/lib-jquery1.10.2.js	35.2 KiB	24.1 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 reason	Failure type
The page has an unload handler in a sub frame.	Actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/pconline/digital/dc/2023/news/2604/20264/20/177668294803...	376.7 KiB
/pconline/images/pconline_cms/20260421/49828437.jpg?x-oss...	256.1 KiB
/pconline/images/pconline_cms/20260420/49792206.jpg?x-oss...	223.8 KiB
/pconline/notebook/nbnews/nbnews/2604/20264/21/1776777583...	202.3 KiB
/pconline/images/pconline_cms/20260421/49828644.jpg?x-oss...	175.4 KiB
/pconline/images/pconline_cms/20260420/49792306.jpg?x-oss...	170.6 KiB
/pconline/images/pconline_cms/20260417/49692465.jpg?x-oss...	165.6 KiB
/pconline/images/pconline_cms/20260421/49829099.jpg?x-oss...	119.3 KiB
img0.pconline.com.cn/pconline/ai/2604/20264/21/17767656412737210.jpg	102.2 KiB
/pconline/images/pconline_cms/20260417/49692198.jpg?x-oss...	76.7 KiB

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

●Max Potential First Input Delay 70 ms

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●JavaScript execution time 0.1 s

●Minimizes main-thread work 1.7 s

●Avoid long main-thread tasks 3 long tasks found

●Image elements have explicit `width` and `height`

●Network Requests

●Network Round Trip Times 240 ms

●Server Backend Latencies 390 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 240 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.g-header-top > div.search > form#Jsearch > input `div.g-header-top > div.search > form#Jsearch > input`
活动 `div.g-doc > div.tits-news > a.tit > span.tag`
更多 `div.yw-list > div.area-title > div.subCha > a`
新智元 `div.list > a.pt > em.info > span.name`
新智元 `div.list > a.pt > em.info > span.name`
手机 `div#JsmMod > div.area-title > div.subCha > a`
笔记本 `div#JsmMod > div.area-title > div.subCha > a`
影像 `div#JsmMod > div.area-title > div.subCha > a`
原创 `a.art > div.txt > em.tags > span.tag`
手机 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
手机 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
手机 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
笔记本 `a.art > div.txt > em.tags > span.tag`
评测 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
笔记本 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
笔记本 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
数码 `a.art > div.txt > em.tags > span.tag`
新品 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
数码 `a.art > div.txt > em.tags > span.tag`
新品 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
数码 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
CPU `div#JyjMod > div.area-title > div.subCha > a`
显卡 `div#JyjMod > div.area-title > div.subCha > a`
主板 `div#JyjMod > div.area-title > div.subCha > a`
更多 `div#JyjMod > div.area-title > div.subCha > a`
原创 `a.art > div.txt > em.tags > span.tag`
DIY外设 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
DIY外设 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
DIY外设 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
电视影音 `div#JjiajuMod > div.area-title > div.subCha > a`
智能家电 `div#JjiajuMod > div.area-title > div.subCha > a`
厨卫家电 `div#JjiajuMod > div.area-title > div.subCha > a`
原创 `a.art > div.txt > em.tags > span.tag`
家电 `a.art > div.txt > em.tags > span.tag`
评测 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
家电 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
家电 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
更多 `div#JsyMod > div.area-title > div.subCha > a`
原创 `a.art > div.txt > em.tags > span.tag`
办公设备 `a.art > div.txt > em.tags > span.tag`
百科 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
办公设备 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
办公设备 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
更多 `div#JqyMod > div.area-title > div.subCha > a`
企业站 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
企业站 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
原创 `a.art > div.txt > em.tags > span.tag`
企业站 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
智行驾道 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
智行驾道 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
智行驾道 `a.art > div.txt > em.tags > span.tag`
资讯 `a.art > div.txt > em.tags > span.tag`
打开 `div#home-bottom-half-dialog > div.bottom-half-dialog-content > div.bottom-half-openapp > div#half-dialog-open-app`

These are opportunities to improve the legibility of your content.

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.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.g-header-top > div.search > form#Jsearch > input `div.g-header-top > div.search > form#Jsearch > input`

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#Jbody > div.g-doc > div.g-header-top > a.logo `body#Jbody > div.g-doc > div.g-header-top > a.logo`
div.g-header-top > div.search > form#Jsearch > a.btn-search `div.g-header-top > div.search > form#Jsearch > a.btn-search`
div.g-doc > div.g-header-top > div.m-center > a#Jmy `div.g-doc > div.g-header-top > div.m-center > a#Jmy`
body#Jbody > div.g-doc > div.news > a.news-tit `body#Jbody > div.g-doc > div.news > a.news-tit`
div.area > div.area-bd > div.pt > a.img `div.area > div.area-bd > div.pt > a.img`
div.area > div.area-bd > div.pt > a.img `div.area > div.area-bd > div.pt > a.img`
div.area > div.area-bd > div.pt > a.img `div.area > div.area-bd > div.pt > a.img`
div.area > div.area-bd > div.pt > a.img `div.area > div.area-bd > div.pt > a.img`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

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-hidden="true"]` is not present on the document `<body>`

●Document has a `<title>` element

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Document has a main landmark.

●Image elements do not have `[alt]` attributes that are redundant text.

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`[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

○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

○`<frame>` or `<iframe>` elements have a title

○Heading elements appear in a sequentially-descending order

○`<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.

○`[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

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

Browser Compatibility

A character encoding declaration is required. It can be done with a `<meta>` tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header. Learn more about declaring the character encoding.

Why this matters

Performance issues directly impact user engagement and conversion rates.

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
g.pconline.com.cn/ line 1236, col 102	`SyntaxError: Invalid or unexpected token`
js.3conline.com/pconlinenew/data/wap/2024/cms/home/js/index.js line 46, col 19	`Uncaught ReferenceError: Swiper is not defined`

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●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

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
div.g-header-top > div.search > form#Jsearch > a.btn-search `div.g-header-top > div.search > form#Jsearch > a.btn-search`
div.g-doc > div#Jdialog > div.video > a.closeBtn `div.g-doc > div#Jdialog > div.video > a.closeBtn`
div.chaNavs > div.block > div.b-hd > a.closeBtn `div.chaNavs > div.block > div.b-hd > a.closeBtn`
body#Jbody > div.g-doc > div.wxShowRelaNews > a.u-close `body#Jbody > div.g-doc > div.wxShowRelaNews > a.u-close`
查看更多 `body#Jbody > div.g-doc > div.wxShowRelaNews > a.u-checkMore`

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.swiper-wrapper > div.swiper-slide > a.item > img.icon `div.swiper-wrapper > div.swiper-slide > a.item > img.icon`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.list > a.pt > img.pic `div.area-bd > div.list > a.pt > img.pic`
div.list > a.pt > em.info > img.img `div.list > a.pt > em.info > img.img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div.area-bd > div.pt > a.img > img `div.area-bd > div.pt > a.img > img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div#JsmMod > div.area-bd > a.art > img.img `div#JsmMod > div.area-bd > a.art > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div.swiper-wrapper > div.swiper-slide > a.pro > img.img `div.swiper-wrapper > div.swiper-slide > a.pro > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JyjMod > div.area-bd > a.art > img.img `div#JyjMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JjiajuMod > div.area-bd > a.art > img.img `div#JjiajuMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JsyMod > div.area-bd > a.art > img.img `div#JsyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JqyMod > div.area-bd > a.art > img.img `div#JqyMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`
div#JcxMod > div.area-bd > a.art > img.img `div#JcxMod > div.area-bd > a.art > img.img`

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

SEO

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.

3.21 s

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

5.70 s

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

3 ms

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

0.097

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

4.07 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.

5.70 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 ▾

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:0.1 source:map[column:3489 line:1 type:source-location url:https://js.3conline.com/min/temp/v2/single-lazy.js urlProvider:network]] map[reflowTime:14.541 source:map[column:635 line:39 type:source-location url:https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js urlProvider:network]] map[reflowTime:0.935 source:map[column:2775 line:39 type:source-location url:https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js urlProvider:network]] map[reflowTime:0.196 source:map[column:1984 line:43 type:source-location url:https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js urlProvider:network]] map[reflowTime:45.211 source:map[column:3035 line:44 type:source-location url:https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js urlProvider:network]] map[reflowTime:1.234 source:map[column:45 line:541 type:source-location url:https://js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=0714 urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
行业触控体验天花板！一加 Ace 6 至尊版触控创新细节揭晓 `div.topic > div.ip-pics > a.link > img.art-img`	img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768300484524900.png	697.6 KiB	691.0 KiB
佳能“打出好前程”系列活动圆满收官 `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260422/49852401.jpg?x-oss...	233.4 KiB	232.1 KiB
【科技实话】笔记本电脑键盘进水急救指南：30分钟黄金抢救期！ `ul > li > a.cha-item-focus > img.art-img`	/pconline/images/pconline_cms/20260109/44453916.jpg?x-oss...	210.2 KiB	201.2 KiB
小智 `a.cha-item-focus > dl.mask > dt > img`	img0.pconline.com.cn/pconline/headphoto/2302/20232/20/16768893618420470.jpg	189.8 KiB	189.7 KiB
华为MateBook 14 鸿蒙版正式发布 `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260420/49798243.jpg?x-oss...	137.5 KiB	136.2 KiB
2026春：全景相机增长迅猛，影石独占七成 `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260422/49880903.jpg?x-oss...	135.7 KiB	134.5 KiB
Pura 90 Pro Max出厂没贴膜的原因是？ `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260422/49861726.jpg?x-oss...	127.4 KiB	126.1 KiB
div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090 `div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090`	imgad0.pconline.com.cn/ivy/image/20264/22/17768438483174150.gif	189.7 KiB	124.2 KiB
今年最后一款不涨价的旗舰新品竟是它 `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260422/49867623.jpg?x-oss...	106.1 KiB	104.9 KiB
1杯冻柠茶 `a.cha-item-focus > dl.mask > dt > img`	img0.pconline.com.cn/pconline/headphoto/2410/202410/8/17283708396055110.jpg	85.5 KiB	85.4 KiB
太评甄选 `li > a.link > i.pic-wrap > img`	/pconline/test/2023/focus/corecha/2601/20261/22/176907606...	85.0 KiB	84.6 KiB
家居新物种 `dl > dd > i.art-author > img`	img0.pconline.com.cn/pconline/headphoto/2601/20261/4/17674942160712940.png	76.8 KiB	76.7 KiB
一隅温柔纪事 ——铭匠 56mm f/1.8 `div.topic > div.ip-pics > a.link > img.art-img`	/pconline/digital/dc/2023/news/2604/20264/22/177682464076...	74.9 KiB	68.8 KiB
div.mod-ip > div.ip-head > div.ip-author > img `div.mod-ip > div.ip-head > div.ip-author > img`	www1.pconline.com.cn/2023/home/images/logo_gaojimengnan.png	66.9 KiB	66.6 KiB
div.m-sub-nav > p.tgLink > a > img `div.m-sub-nav > p.tgLink > a > img`	www1.pconline.com.cn/sale/2026/images/0306/banner.png	66.7 KiB	65.7 KiB
智哥 `dl > dd > i.art-author > img`	img0.pconline.com.cn/pconline/headphoto/2305/20235/29/16853263696184870.jpg	65.7 KiB	65.7 KiB
HyperX暗影精灵PRO 16双版本解析 `dl.cha-art-list > dt > a > img.art-img`	/pconline/images/pconline_cms/20260420/49787319.jpg?x-oss...	62.5 KiB	61.2 KiB
iPhone 18 Pro新配色曝光：星宇橙退场，酒红色或成新主打色！ `ul > li > a.cha-item-focus > img.art-img`	/pconline/images/pconline_cms/20260422/49879930.jpg?x-oss...	56.4 KiB	47.4 KiB
DIY硬件频道 `a.cha-item-focus > dl.mask > dt > img`	img0.pconline.com.cn/pconline/headphoto/2305/20235/16/16842298745959220.png	39.9 KiB	39.9 KiB
div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206 `div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206`	/ivy/image/202511/12/17629351873642770.jpg?IVY_LEVEL_0?11...	47.0 KiB	38.6 KiB
手机+小平板太阔了，华为Pura X Max真机上手体验 `ul > li > a.pic-wrap > img.focus-pic`	/pconline/test/2023/focus/big/2604/20264/22/1776830346818...	58.5 KiB	31.4 KiB
灭霸再加码！vivo Y600 Pro续航耐用全都要 `ul > li > a.pic-wrap > img.focus-pic`	img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768295836625150.jpg	58.2 KiB	31.1 KiB
太平洋科技 `div.wrap > div.m-top > h1 > a.logo`	www1.pconline.com.cn/cms/home/20251128/images/pconline_home_logo.png	31.3 KiB	24.7 KiB
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`	/pconline/news/broadcasting/2301/20231/17/167394874388153...	19.0 KiB	18.5 KiB
YIHAN `dl > dd > i.art-author > img`	img0.pconline.com.cn/pconline/headphoto/2302/20232/1/16752321965791570.jpg	10.1 KiB	10.0 KiB
div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228 `div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228`	imgad0.pconline.com.cn/ivy/image/20264/20/17766681201860480.gif	35.4 KiB	9.4 KiB
小烂毛 `a > p > i.art-info > img.art-author-pic`	img0.pconline.com.cn/pconline/1807/06/11440927_ws_thumb.jpg	8.4 KiB	8.3 KiB
HUAWEI Pura90 Pro Max `ul.rank > li.current > a > img`	img4.pconline.com.cn/pconline/images/product/20260410/49423683_sn.png	8.2 KiB	8.0 KiB
div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108 `div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108`	imgad0.pconline.com.cn/ivy/image/20264/22/17768242081853570.jpg	22.9 KiB	7.9 KiB
一隅温柔纪事 ——铭匠 56mm f/1.8 `ul > li > a.cha-item-focus > img.art-img`	/pconline/digital/dc/2023/news/2604/20264/22/177682483680...	16.2 KiB	7.2 KiB
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`	/pconline/news/broadcasting/2301/20231/17/167394915051216...	7.5 KiB	6.8 KiB
手机&PC迎五年来最大规模涨价 `div.ip-item-wrap > a.item > i.pic-wrap > img`	/pconline/test/2023/focus/small/2604/20264/13/17760538607...	7.6 KiB	6.4 KiB
机械革命苍龙18 Pro(R9-9955HX/16GB/1TB/RTX5070/180Hz/2.5K) `ul.rank > li.current > a > img`	img4.pconline.com.cn/pconline/images/product/20260323/48588598_sn.jpg	5.7 KiB	5.4 KiB
【专题】从OpenClaw爆火到全民养虾，带您看懂AI龙虾全貌 `div.ip-item-wrap > a.item > i.pic-wrap > img`	/pconline/test/2023/focus/ip/2604/20264/13/17760536289234...	6.4 KiB	5.3 KiB
苹果五十年：在AI时代寻找下一个iPhone `div.ip-item-wrap > a.item > i.pic-wrap > img`	/pconline/test/2023/focus/ip/2604/20264/20/17766742233139...	6.1 KiB	5.0 KiB
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`	/pconline/news/broadcasting/2301/20231/17/167394907381967...	5.6 KiB	4.9 KiB
ul.uationRoom > li > a.type-video > i.label-uation `ul.uationRoom > li > a.type-video > i.label-uation`	www1.pconline.com.cn/2023/cms/home/images/label_pingceshi.png	6.4 KiB	4.1 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:1398.887 label:Time to first byte subpart:timeToFirstByte] map[duration:1959.826 label:Resource load delay subpart:resourceLoadDelay] map[duration:692.443 label:Resource load duration subpart:resourceLoadDuration] map[duration:68.836 label:Element render delay subpart:elementRenderDelay]]

lhId: page-21-IMG

nodeLabel: 灭霸再加码！vivo Y600 Pro续航耐用全都要

path: 1,HTML,1,BODY,7,DIV,6,DIV,1,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,UL,0,LI,0,A,0,IMG

selector: ul > li > a.pic-wrap > img.focus-pic

snippet: <img src="//img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768295836625…" width="696" height="393" class="focus-pic" loading="lazy" alt="灭霸再加码！vivo Y600 Pro续航耐用全都要">

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-21-IMG

nodeLabel: 灭霸再加码！vivo Y600 Pro续航耐用全都要

path: 1,HTML,1,BODY,7,DIV,6,DIV,1,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,UL,0,LI,0,A,0,IMG

selector: ul > li > a.pic-wrap > img.focus-pic

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.

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.

URL	Transfer Size	Duration
js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1	5.8 KiB	191 ms
js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1	11.1 KiB	667 ms
/adpuba/online_test_show?id=pc.sy.test15.&media=js&channe...	3.4 KiB	754 ms
www.pconline.com.cn/_hux_/index.js	3.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
imgad0.pconline.com.cn/ivy/image/20264/22/17768438483174150.gif	900.0 s	190.4 KiB
/ivy/image/202511/12/17629351873642770.jpg?IVY_LEVEL_0?11...	900.0 s	47.4 KiB
js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js	3600.0 s	49.8 KiB
imgad0.pconline.com.cn/ivy/image/20264/20/17766681201860480.gif	900.0 s	35.9 KiB
www1.pconline.com.cn/2023/home/images/logo_gaojimengnan.png	86400.0 s	67.2 KiB
www1.pconline.com.cn/sale/2026/images/0306/banner.png	86400.0 s	67.1 KiB
www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpg	86400.0 s	66.1 KiB
imgad0.pconline.com.cn/ivy/image/20264/22/17768242081853570.jpg	900.0 s	23.4 KiB
/ivy/image/20261/5/17675979077870360.jpg?IVY_LEVEL_0?6837...	900.0 s	21.2 KiB
/ivy/image/20261/14/17683609910780010.jpg?IVY_LEVEL_0?237...	900.0 s	20.7 KiB
www1.pconline.com.cn/cms/home/20251128/images/pconline_home_logo.png	86400.0 s	31.6 KiB
www1.pconline.com.cn/2023/cms/home/images/img_jubao.jpg	86400.0 s	25.5 KiB
www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.png	86400.0 s	23.2 KiB
www1.pconline.com.cn/2024/cms/hotchannel/logo/home-hotchannel.png	86400.0 s	23.1 KiB
js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1	3600.0 s	11.1 KiB
www1.pconline.com.cn/2023/cms/home/images/placeholder.png	86400.0 s	16.2 KiB
js.3conline.com/min/temp/v2/core-pc_v1.js	3600.0 s	7.4 KiB
www1.pconline.com.cn/2022/home/qrcode/QRcode.png	86400.0 s	12.8 KiB
js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1	3600.0 s	5.8 KiB
www1.pconline.com.cn/cms/home/2025/images/0927/ico-video-play.webp	900.0 s	4.6 KiB
js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=0714	3600.0 s	4.6 KiB
/adpuba/online_test_show?id=pc.sy.test15.&media=js&channe...	0.0 ms	3.4 KiB
www.pconline.com.cn/_hux_/index.js	900.0 s	3.7 KiB
www1.pconline.com.cn/2023/cms/home/images/label_pingceshi.png	86400.0 s	6.8 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_pro_tiantitu.png	86400.0 s	6.6 KiB
www1.pconline.com.cn/2023/cms/home/images/label_yuanchuang.png	86400.0 s	6.3 KiB
js.3conline.com/pconlinenew/data/common/login/css/pconline_login_pop.css	3600.0 s	3.0 KiB
www1.pconline.com.cn/2023/cms/home/images/auto_suv.png	86400.0 s	5.5 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_ori_channel.png	86400.0 s	5.5 KiB
www1.pconline.com.cn/talent/images/2025/1030/v-guanfang.webp	900.0 s	2.4 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-play.png	86400.0 s	5.3 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_sc_discuss.png	86400.0 s	5.2 KiB
www1.pconline.com.cn/2023/cms/home/images/auto_mpv.png	86400.0 s	5.2 KiB
www1.pconline.com.cn/2023/cms/home/images/auto_business.png	86400.0 s	5.2 KiB
www1.pconline.com.cn/2023/cms/home/images/auto_jiaoche.png	86400.0 s	5.0 KiB
www1.pconline.com.cn/2023/cms/home/images/hover_auto_suv.png	86400.0 s	4.8 KiB
www1.pconline.com.cn/bbs/2017huawei.jpg	86400.0 s	4.6 KiB
www1.pconline.com.cn/2023/cms/home/images/hover_auto_mpv.png	86400.0 s	4.6 KiB
www1.pconline.com.cn/2023/cms/home/images/hover_auto_jiaoche.png	86400.0 s	4.5 KiB
www1.pconline.com.cn/2023/cms/home/images/hover_auto_business.png	86400.0 s	4.4 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_pro_rank.png	86400.0 s	4.3 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_turn.png	86400.0 s	4.1 KiB
www1.pconline.com.cn/2023/cms/home/images/hover_auto_run.png	86400.0 s	3.8 KiB
www1.pconline.com.cn/2023/cms/home/images/auto_run.png	86400.0 s	3.8 KiB
js.3conline.com/min/temp/v2/single-lazy.js	3600.0 s	1.9 KiB
www1.pconline.com.cn/cms/2026/home/images/ico-hot.webp	900.0 s	1.5 KiB
jwz.3conline.com/show?id=pc.other.test15.&media=js&channel=dynamic&	0.0 ms	1.2 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-zhizao.png	86400.0 s	2.5 KiB
www1.pconline.com.cn/2026/cms/home/images/bg-tebiecehua.png	86400.0 s	2.1 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-ai.png	86400.0 s	2.1 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-auto.png	86400.0 s	2.1 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-qy.png	86400.0 s	2.1 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-family.png	86400.0 s	2.0 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-best.png	86400.0 s	1.9 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-diy.png	86400.0 s	1.9 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-gzh.png	86400.0 s	1.8 KiB
www1.pconline.com.cn/ai/2025/cms/images/ico-new.png	86400.0 s	1.7 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-sm.png	86400.0 s	1.6 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-qrcode.png	86400.0 s	1.6 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-cx.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-tit-office.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/2023/cms/home/images/ico_search.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/cms/2024/cms_author/images/50.png	86400.0 s	1.5 KiB
www1.pconline.com.cn/2023/cms/home/images/bg_origList.png	86400.0 s	1.3 KiB
www1.pconline.com.cn/2023/cms/home/images/ico_level_v.png	86400.0 s	1.3 KiB
www1.pconline.com.cn/zt/20160901/ad1p.png	86400.0 s	1.3 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-qy.png	86400.0 s	1.3 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-family.png	86400.0 s	1.3 KiB
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-sm.png	86400.0 s	981 B
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-office.png	86400.0 s	956 B
www1.pconline.com.cn/2023/cms/home/images/ico-mobile-t.png	86400.0 s	937 B
www1.pconline.com.cn/2023/cms/home/images/ico-subnav-diy.png	86400.0 s	936 B
www1.pconline.com.cn/2023/cms/home/images/ico_arrow_down.png	86400.0 s	771 B
www1.pconline.com.cn/2023/cms/home/images/ico-pcgroup.png	86400.0 s	674 B
www.pconline.com.cn/blank.gif	86400.0 s	353 B

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: 740 ms

URL	Time Spent
pconline.com.cn/	740 ms
www.pconline.com.cn/	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

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.

Estimated savings: 0.0 ms 25.0 KiB

URL	Transfer Size	Est Savings
js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js	49.5 KiB	12.5 KiB
js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js	49.5 KiB	12.5 KiB

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

Why this matters

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

Learn more ▾

Source: Google web.dev / Lighthouse

Estimated savings: 0.0 ms 80.0 KiB

URL	Transfer Size	Est Savings
js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js	49.1 KiB	40.0 KiB
js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js	49.1 KiB	40.0 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/pconline/test/2023/focus/corecha/2603/20263/19/177388764...	1.5 MiB
img0.pconline.com.cn/pconline/mobile/review/2604/20264/22/17768300484524900.png	698.8 KiB
/pconline/images/pconline_cms/20260422/49852401.jpg?x-oss...	234.1 KiB
/pconline/images/pconline_cms/20260109/44453916.jpg?x-oss...	210.9 KiB
img0.pconline.com.cn/pconline/headphoto/2302/20232/20/16768893618420470.jpg	190.5 KiB
imgad0.pconline.com.cn/ivy/image/20264/22/17768438483174150.gif	190.4 KiB
/pconline/images/pconline_cms/20260420/49798243.jpg?x-oss...	138.0 KiB
/pconline/images/pconline_cms/20260422/49880903.jpg?x-oss...	136.3 KiB
/pconline/images/pconline_cms/20260422/49861726.jpg?x-oss...	128.0 KiB
/pconline/images/pconline_cms/20260422/49867623.jpg?x-oss...	106.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
div.m-sub-nav > p.tgLink > a > img `div.m-sub-nav > p.tgLink > a > img`	www1.pconline.com.cn/sale/2026/images/0306/banner.png
div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206 `div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206`	/ivy/image/202511/12/17629351873642770.jpg?IVY_LEVEL_0?11...
div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817 `div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817`	/ivy/image/20261/14/17683609910780010.jpg?IVY_LEVEL_0?237...
div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744 `div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744`	/ivy/image/20261/5/17675979077870360.jpg?IVY_LEVEL_0?6837...

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

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 40 ms

●Minify CSS

●Reduce unused CSS

●JavaScript execution time 0.2 s

●Minimizes main-thread work 1.6 s

●Avoid long main-thread tasks 1 long task found

●Avoid non-composited animations 2 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 240 ms

●Server Backend Latencies 530 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 350 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

Accessibility

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 `div#ajaxLogon > dl.nav-sub > dt > a.btn-login`
栏目 `a.link > dl > dt > span.label`
三水 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
三水 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
九月 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
小烂毛 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
佚名 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
佚名 `a > p > i.art-info > span.art-author`
资讯 `a > p > i.art-info > span.art-type`
选机中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
品牌： `div.pannel > ul.hotProList > li.items-brand > em`
推荐： `div.pannel > ul.hotProList > li > em`
价格： `div.pannel > ul.hotProList > li > em`
九月 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
家居新物种 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
佚名 `a.item > dl > dd > i.art-author`
专访 `a.item > dl > dd > i.art-type`
九月 `a.item > dl > dd > i.art-author`
导购 `a.item > dl > dd > i.art-type`
蒜鸟 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
九月 `a.item > dl > dd > i.art-author`
导购 `a.item > dl > dd > i.art-type`
选机中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
品牌： `div.pannel > ul.hotProList > li.items-brand > em`
推荐： `div.pannel > ul.hotProList > li > em`
价格： `div.pannel > ul.hotProList > li > em`
小智 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
智哥 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
智哥 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
智哥 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
智哥 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
小智 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
选车中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
级别： `div.pannel > ul.autoNavList > li > em`
续航： `div.pannel > ul.autoNavList > li > em`
价格： `div.pannel > ul.autoNavList > li.items-brand > em`
更多> `div.mod-ip > div.ip-head > div.ip-more > a`
DIY硬件频道 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
YIHAN `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
YIHAN `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
佚名 `a.item > dl > dd > i.art-author`
商业 `a.item > dl > dd > i.art-type`
YIHAN `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
YIHAN `a.item > dl > dd > i.art-author`
评测 `a.item > dl > dd > i.art-type`
选机中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
品牌： `div.pannel > ul.hotProList > li.items-brand > em`
推荐： `div.pannel > ul.hotProList > li > em`
价格： `div.pannel > ul.hotProList > li > em`
NVIDIA GeForce RTX 5090 D `a > ul.pro-tiantitu-rank > li.type-green > p`
NVIDIA GeForce RTX 4090 D `a > ul.pro-tiantitu-rank > li.type-green > p`
NVIDIA GeForce RTX 5080 `a > ul.pro-tiantitu-rank > li.type-green > p`
AMD Radeon RX 7900 XTX `a > ul.pro-tiantitu-rank > li.type-red > p`
西贝0705 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
九月 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
九月 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
办公仔 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
西贝0705 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
办公仔 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
选机中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
品牌： `div.pannel > ul.hotProList > li.items-brand > em`
推荐： `div.pannel > ul.hotProList > li > em`
价格： `div.pannel > ul.hotProList > li > em`
办公仔 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
西贝0705 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
佚名 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
佚名 `a.item > dl > dd > i.art-author`
轻聊 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
轻聊 `a.item > dl > dd > i.art-author`
资讯 `a.item > dl > dd > i.art-type`
选机中心 `div.pro-nav > div.pro-nav-hd > div.pro-nav-smark > a.btn`
品牌： `div.pannel > ul.hotProList > li.items-brand > em`
推荐： `div.pannel > ul.hotProList > li > em`
价格： `div.pannel > ul.hotProList > li > em`
明月玩数码 `div.best-art-list > a.item > dl > dd`
稀范数码 `div.best-art-list > a.item > dl > dd`
alon `div.best-art-list > a.item > dl > dd`
About PCGROUP \| 网站介绍 \| 隐私政策 \| 广告服务 \| 合作媒体 \| 投稿指南 \| 使用条款 \| 联系我们 \| 招聘精英 \| 网站地图 \| … `div.wrap > div.footer-wrap > div.pconline-links > p.links`
未经授权禁止转载、摘编、复制或建立镜像，如有违反，追究法律责任。技术支持与报障：support@pconline.com.cn 对本站有任何建议、意见或投诉… `div.wrap > div.footer-wrap > div.pconline-links > p.copyRight`

These are opportunities to improve the legibility of your content.

Tables and lists

When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
国产镜头铭匠56mmF1.8唯美人像 `div.topic > div.ip-pics > a.link > dl.mask`
一加 Ace 6至尊版触控创新细节揭晓 `div.topic > div.ip-pics > a.link > dl.mask`
【专题】苹果50年：AI时代寻找下一个iPhone `dd > div.ip-item-wrap > a.item > dl`
【专题】AI智能体爆发：数字员工的崛起之路 `dd > div.ip-item-wrap > a.item > dl`
【专题】手机&电脑迎五年来最大规模涨价 `dd > div.ip-item-wrap > a.item > dl`
【专题】被抄创意，原创者权益该如何守护？ `dd > div.ip-item-wrap > a.item > dl`
英特尔酷睿Ultra200S Plus系列处理器首发评测：加核提速，全是硬货！ `ul.uationRoom > li > a.type-video > dl.mask`
满血PD3.1雷霆战力！航嘉高能 S140 Pro氮化镓安全快充深度评测：终结你的电量焦虑 `ul.uationRoom > li > a.type-video > dl.mask`
横评终章！谁是最值得买的家用打印机？ `ul.uationRoom > li > a.type-video > dl.mask`
比快更快的巅峰屠戮！AMD 锐龙7 9850X3D首发评测：游戏之王终极形态 `ul.uationRoom > li > a.type-video > dl.mask`
海信电视E8S评测：影游天花板，配置体验全拉满 `ul.uationRoom > li > a.type-video > dl.mask`
众测免费试用！wedoking睡眠耳机 `ul > li > a.cha-item-focus > dl.mask`

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

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.m-sub-nav > p.tgLink > a > img `div.m-sub-nav > p.tgLink > a > img`
div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228 `div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228`
div.ivy-tonglan > div#ad1835228Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1835228Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108 `div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108`
div.ivy-tonglan > div#ad1844108Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1844108Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206 `div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.mod-ip > div.ip-head > div.ip-author > img `div.mod-ip > div.ip-head > div.ip-author > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090 `div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090`
div.ivy-tonglan > div#ad1844090Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1844090Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817 `div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744 `div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744`
div.item-rs-ivy > div#ad1571744Wrap > div.jsAdAdTipWrap > img `div.item-rs-ivy > div#ad1571744Wrap > div.jsAdAdTipWrap > img`
dd > div.records > p > img `dd > div.records > p > img`

Adding discernable and accessible text to input buttons may help screen reader users understand the purpose of the input button. Learn more about input buttons.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
form#JsearchForm > div.search > div.ks-input > input.btn-search `form#JsearchForm > div.search > div.ks-input > input.btn-search`

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.topic > div#JfocusPic > div.focus-wrapper > a.prev `div.topic > div#JfocusPic > div.focus-wrapper > a.prev`
div.topic > div#JfocusPic > div.focus-wrapper > a.next `div.topic > div#JfocusPic > div.focus-wrapper > a.next`
div#Jwrap > div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 `div#Jwrap > div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228`
div#Jwrap > div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 `div#Jwrap > div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108`
div.col-d > div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 `div.col-d > div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206`
div#Jwrap > div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 `div#Jwrap > div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090`
div.col-d > div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 `div.col-d > div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817`
div.col-d > div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 `div.col-d > div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
智造热点：一帮机器人公司苦练一年，冠军被搞手机的给抢了 `div.txtItem > ul > li > a`
手机热点：消失8年的金立手机又上热搜，搁这演电视剧呢？ `div.txtItem > ul > li > a`

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-hidden="true"]` is not present on the document `<body>`

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●Definition list items are wrapped in `<dl>` elements

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Heading elements appear in a sequentially-descending order

●Image elements do not have `[alt]` attributes that are redundant text.

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`[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

○Buttons have an accessible name

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

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input 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.

○`[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

○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.

100

Best Practices

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●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

SEO

Crawling and Indexing

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #	Content	Error
14	`Disallow:.js$`	`Pattern should either be empty, start with "/" or "*"`
15	`Disallow:.css$`	`Pattern should either be empty, start with "/" or "*"`

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.m-sub-nav > p.tgLink > a > img `div.m-sub-nav > p.tgLink > a > img`
div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228 `div.ivy-tonglan > div#ad1835228Wrap > a#ad1835228 > img#img_ad1835228`
div.ivy-tonglan > div#ad1835228Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1835228Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108 `div.ivy-tonglan > div#ad1844108Wrap > a#ad1844108 > img#img_ad1844108`
div.ivy-tonglan > div#ad1844108Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1844108Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206 `div.item-rs-ivy > div#ad1569206Wrap > a#ad1569206 > img#img_ad1569206`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.ori-channel > div.col-three-channel > a.channel > img `div.ori-channel > div.col-three-channel > a.channel > img`
div.mod-ip > div.ip-head > div.ip-author > img `div.mod-ip > div.ip-head > div.ip-author > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090 `div.ivy-tonglan > div#ad1844090Wrap > a#ad1844090 > img#img_ad1844090`
div.ivy-tonglan > div#ad1844090Wrap > div.jsAdAdTipWrap > img `div.ivy-tonglan > div#ad1844090Wrap > div.jsAdAdTipWrap > img`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817 `div.item-rs-ivy > div#ad1571817Wrap > a#ad1571817 > img#img_ad1571817`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
i.item > a.proName > span.u-picWrap > img.u-pic `i.item > a.proName > span.u-picWrap > img.u-pic`
div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744 `div.item-rs-ivy > div#ad1571744Wrap > a#ad1571744 > img#img_ad1571744`
div.item-rs-ivy > div#ad1571744Wrap > div.jsAdAdTipWrap > img `div.item-rs-ivy > div#ad1571744Wrap > div.jsAdAdTipWrap > img`
dd > div.records > p > img `dd > div.records > p > 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

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`

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