Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:0.752 source:map[column:30286 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]]]

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

items: [map[reflowTime:4.06 source:map[column:27484 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:32.674 source:map[column:26389 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:0.239 source:map[column:26518 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:0.173 source:map[column:26828 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:0.168 source:map[column:26890 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:1.396 source:map[column:27147 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:0.275 source:map[column:27223 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]] map[reflowTime:0.752 source:map[column:31379 line:1 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js urlProvider:network]]]

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:2184.984 label:Time to first byte subpart:timeToFirstByte] map[duration:576.986 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-A

nodeLabel: 季逸超回应Manus代码遭越狱：“团队一直有开源传统，即将开源不少好东西，多Agent是关键特性”

path: 1,HTML,1,BODY,2,DIV,0,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,1,DIV,4,A

selector: div.floor-hot > div.hot-item > div.hot-content > a.cont

snippet: <a href="https://blog.csdn.net/csdnnews/article/details/146179635" class="cont ellipsis-1" data-v-5d6bc824="">

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
g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js	33.2 KiB	1.1 s
g.csdnimg.cn/user-ordercart/2.0.1/user-ordercart.js	2.8 KiB
g.csdnimg.cn/??debug/1.0.0/debug.js	1.1 KiB
csdnimg.cn/release/cmsfe/public/css/tpl/www-index-new-m/index.493dc5e9.css	4.6 KiB
csdnimg.cn/release/cmsfe/public/css/common.ef7517d8.css	110.4 KiB	1.5 s

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
g.csdnimg.cn/common/csdn-report/report.js	1800.0 s	21.6 KiB
g.csdnimg.cn/common/csdn-login-box/csdn-login-box.js	1800.0 s	16.8 KiB
csdnimg.cn/public/common/toolbar/js/m_iconfont.js?v=1.1.6	1800.0 s	9.9 KiB
csdnimg.cn/public/common/toolbar/js/m_toolbar-2.1.4.js	1800.0 s	8.6 KiB
csdnimg.cn/public/common/toolbar/js/m_toolbar_left_icon.js?v=1.1.0	1800.0 s	7.7 KiB
csdnimg.cn/public/common/toolbar/content_toolbar_css/m_toolbar-2.1.4.css	1800.0 s	2.9 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/community.png	1800.0 s	2.2 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/activity.png	1800.0 s	1.9 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/vip.png	1800.0 s	1.7 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/college.png	1800.0 s	1.7 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/ask.png	1800.0 s	1.3 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/job.png	1800.0 s	1.2 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/download.png	1800.0 s	1.2 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/home.png	1800.0 s	1.2 KiB
csdnimg.cn/public/common/toolbar/images/toolbar-icon/topic.png	1800.0 s	962 B
csdnimg.cn/public/common/toolbar/images/toolbar-icon/blog.png	1800.0 s	803 B
csdnimg.cn/public/common/toolbar/images/toolbar-icon/app.png	1800.0 s	690 B
csdnimg.cn/cdn/content-toolbar/icon_search_del.png	604800.0 s	881 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
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/26d91d6fab8f40309cf58fc34c59f496.png?x-oss-proces...	129.2 KiB	117.6 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/e8c93f090a124767bb608c0ef1695a1b.png?x-oss-proces...	126.5 KiB	114.9 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/e834825aac9d4571891680915aee9cfc.png?x-oss-proces...	124.3 KiB	112.7 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/9a46fb687a5d46859f3fc9b41e965823.png?x-oss-proces...	120.6 KiB	109.0 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/723ae03ce6774c898444db37d09d2693_taotiezhengfeng.jpg!1	73.8 KiB	73.6 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/edafa15aa66b46e6baffcf8567d7ba7a_qq_29132907.jpg!1	67.0 KiB	66.8 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/f531d2e356b34b9589ffa95fa3b9b573.png?x-oss-proces...	77.3 KiB	65.7 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	i-avatar.csdnimg.cn/a0484c941a5e47e6909270a3a842e7c5_2401_84643729.jpg!1	50.8 KiB	50.6 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	i-avatar.csdnimg.cn/c39a926b885a49e1a1fa7fdcaeb14501_Gr419627.jpg!1	43.9 KiB	43.7 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/decf265c71064decb4106e78550ae2a0_qq_73478334.jpg!1	42.2 KiB	42.0 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/e3f7fba30edd4c609ceba055bfe04dc0.png?x-oss-proces...	45.1 KiB	33.5 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	i-avatar.csdnimg.cn/7f7026888a4f4180a548c7433fcedca8_lxttzlove.jpg!1	18.7 KiB	18.5 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/default.jpg!1	16.1 KiB	15.9 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	i-avatar.csdnimg.cn/be4203913fad41c582ef0704e56baf64_user340.jpg!1	14.7 KiB	14.5 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	i-avatar.csdnimg.cn/458fa65e7261431b8599d0c12475bdc8_qq_40303030.jpg!1	14.1 KiB	13.9 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/1257089e0ca34de5a8856f70e8c3b6f3_m0_57476762.jpg!1	12.7 KiB	12.5 KiB
div.content-default > p > img `div.content-default > p > img`	csdnimg.cn/release/cmsfe/public/img/content-default.e5ec1ba1.png	17.6 KiB	11.6 KiB
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`	/direct/9e28e3619a224e1d8b15ce76ffb961b8.png?x-oss-proces...	18.9 KiB	7.3 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/dbcf5391f8ce410296cebed6cfd4bce7_fysuccess.jpg!1	6.8 KiB	6.6 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/777c77dbbd294bf29a1f75f2aa193884_weixin_43989195.jpg!1	6.7 KiB	6.5 KiB
div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo `div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo`	img-home.csdnimg.cn/images/20201125103341.png	6.3 KiB	5.8 KiB
div.blog-recom-item > div.recom-header > a.portrait > img `div.blog-recom-item > div.recom-header > a.portrait > img`	profile-avatar.csdnimg.cn/e32271a985d74bc2b1fbdea93a777602_weixin_61971601.jpg!1	5.4 KiB	5.2 KiB

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.4 s

URL	Time Spent
csdn.net/	1.4 s
www.csdn.net/	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 505 ms

URL	Time Spent
www.csdn.net/	605 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 450 ms 109.5 KiB

URL	Transfer Size	Est Savings
csdnimg.cn/release/cmsfe/public/css/common.ef7517d8.css	110.0 KiB	109.5 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

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 750 ms 193.0 KiB

URL	Transfer Size	Est Savings
csdnimg.cn/release/cmsfe/public/js/chunk/common.3603c287.js	227.3 KiB	161.4 KiB
csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-new-m/index.58b3b1ef.js	63.8 KiB	31.6 KiB

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	927 ms
Style & Layout	715 ms
Other	682 ms
Script Parsing & Compilation	218 ms
Rendering	135 ms
Parse HTML & CSS	101 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo `div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo`	img-home.csdnimg.cn/images/20201125103341.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/home.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/blog.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/college.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/vip.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/app.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/ask.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/download.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/activity.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/job.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/topic.png
li > a > div > img `li > a > div > img`	csdnimg.cn/public/common/toolbar/images/toolbar-icon/community.png

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

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,672 KiB

●JavaScript execution time 1.1 s

●Avoid long main-thread tasks 9 long tasks found

●Network Requests

●Network Round Trip Times 290 ms

●Server Backend Latencies 320 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

Accessibility

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

ARIA

When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to make command elements more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.van-dropdown > div.van-dropdown-menu > div.van-dropdown-menu__bar > div.van-dropdown-menu__item `div.van-dropdown > div.van-dropdown-menu > div.van-dropdown-menu__bar > div.van-dropdown-menu__item`

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

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
关注 `div#floor-content_885 > div.floor-blog-content > div.blog-cont-type > p`
资讯 `div#floor-content_885 > div.floor-blog-content > div.blog-cont-type > p`
热榜 `div#floor-content_885 > div.floor-blog-content > div.blog-cont-type > p`
动态 `div#floor-content_885 > div.floor-blog-content > div.blog-cont-type > p`
有红包 `div#floor-content_885 > div.floor-blog-content > div.blog-cont-type > p`
601阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
381阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
207阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
66阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
77阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
601阅读 · 20评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
701阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
108阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
234阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
393阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
439阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
77阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
339阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
201阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
205阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
10阅读 · 3回答 `div.blog-recom-item > div.recom-content > dl > dd.desc`
1530阅读 · 59评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
312阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`
191阅读 · 0评论 `div.blog-recom-item > div.recom-content > dl > dd.desc`

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
实测文心大模型X1与文心大模型4.5，我们发现了这些惊喜 3月16日，百度文心大模型4.5如约正式上线，还惊喜发布了另一款新模型——文心大模型X1。 `div.hot-item > div.hot-content > a.top > dl`
华为PC全面转鸿蒙开发者称Cursor拒绝帮写代码\| 极客头条 `div.hot-item > div.hot-content > a.top > dl`

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.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo `div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo`
div.csdn-toolbar-box > div.rightmenu > div.toolbarBack > img#mToolbarHome `div.csdn-toolbar-box > div.rightmenu > div.toolbarBack > img#mToolbarHome`

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`
div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image `div.blog-cont-cont > div.blog-recom-item > div.recom-content > a.image`

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

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta `head > meta`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

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

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

●`[role]` values are valid

●Form elements have associated labels

●`[aria-hidden="true"]` elements do not contain focusable descendents

●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

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○ARIA attributes are used as specified for the element's role

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted 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

○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 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.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

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

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

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Unload event listeners are deprecated and will be removed.	csdnimg.cn/release/cmsfe/public/js/chunk/common.3603c287.js

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

SEO

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo `div.csdn-toolbar-box > div.mToolbarL > a.logo > img.logo`
div.csdn-toolbar-box > div.rightmenu > div.toolbarBack > img#mToolbarHome `div.csdn-toolbar-box > div.rightmenu > div.toolbarBack > img#mToolbarHome`

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`