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.

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
assets.cnblogs.com/scripts/jquery-3.3.1.min.js	30.1 KiB	1.3 s
/js/aggsite-new.min.js?v=IgggDUGX9TUGTatF8b3WO8A4-JU6Svvk...	15.0 KiB	1.4 s
/css/aggsite-mobile-new.min.css?v=YMpXmij1nWQn-rD5YaD-ysY...	1.8 KiB
/css/aggsite-new.min.css?v=7sib-h13OYZwJEAWQ_Ga4Iv03GPTQ-...	4.9 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
assets.cnblogs.com/images/ghs.png	86400.0 s	19.0 KiB

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#side_right > div#cnblogs_b4 > a > img `div#side_right > div#cnblogs_b4 > a > img`	img2024.cnblogs.com/blog/35695/202603/35695-20260305163238916-712956342.jpg	76.5 KiB	39.1 KiB
div#side_right > div#cnblogs_b2 > a > img `div#side_right > div#cnblogs_b2 > a > img`	img2024.cnblogs.com/blog/35695/202604/35695-20260415221132085-1775010472.webp	70.1 KiB	32.8 KiB
div#footer_bottom > div.beian > a.gongan > img `div#footer_bottom > div.beian > a.gongan > img`	assets.cnblogs.com/images/ghs.png	18.8 KiB	18.7 KiB
div#side_right > div#cnblogs_b3 > a > img `div#side_right > div#cnblogs_b3 > a > img`	img2024.cnblogs.com/blog/35695/202512/35695-20251205182619157-1150461542.webp	54.6 KiB	17.2 KiB
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3784694/20260401160101.png	5.9 KiB	5.5 KiB
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3708248/20250926144504.png	5.6 KiB	5.2 KiB
div#side_right > div#cnblogs_b1 > a > img `div#side_right > div#cnblogs_b1 > a > img`	img2024.cnblogs.com/blog/35695/202512/35695-20251201125434258-461912837.webp	19.9 KiB	4.7 KiB
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3693259/20260319124404.png	5.0 KiB	4.6 KiB
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3578564/20241218184338.png	4.6 KiB	4.2 KiB
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/534218/20200616131310.png	4.5 KiB	4.2 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: 1.3 s

URL	Time Spent
cnblogs.com/	1.3 s
www.cnblogs.com/	0.0 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

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

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: 0.0 ms 64.5 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-M95P3TTWJZ	157.0 KiB	64.5 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
博客园Logo `ul.navbar-list > li.navbar-branding > a > img`	www.cnblogs.com/images/logo.svg?v=2SMrXdIvlZwVoB1akyXm38WIKuTHVqvGD0CweV-B6cY
ul.navbar-list > li.dropdown > div.dropdown-button > img `ul.navbar-list > li.dropdown > div.dropdown-button > img`	www.cnblogs.com/images/aggsite/pulldown-bold.svg

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

●Max Potential First Input Delay 120 ms

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 618 KiB

●User Timing marks and measures 9 user timings

●JavaScript execution time 0.5 s

●Minimizes main-thread work 1.9 s

●Avoid long main-thread tasks 5 long tasks found

●Avoid non-composited animations 1 animated element found

●Network Requests

●Network Round Trip Times 240 ms

●Server Backend Latencies 880 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 230 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○LCP request discovery

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
分类 `ul.sidenav > li#sidenav_category > a > span`
精华 `ul.sidenav > li#sidenav_pick > a > span`
订阅 `ul.sidenav > li#sidenav_subscription > a > span`
关注 `ul.sidenav > li#sidenav_following > a > span`
我评 `ul.sidenav > li#sidenav_commented > a > span`
我赞 `ul.sidenav > li#sidenav_digged > a > span`
足迹 `ul.sidenav > li#sidenav_history > a > span`
··· `div#pager_bottom > div#paging_block > div.pager > span.ellipsis`
100 `div#pager_bottom > div#paging_block > div.pager > a.p_100`
48小时阅读排行 `div#side_right > div.card > h4.card-title > a`
10天推荐排行 `div#side_right > div.card > h4.card-title > a`
15天热门博文 `div#side_right > div.card > h4.card-title > a`
编辑推荐 `div#side_right > div.card > h4.card-title > a`
热门新闻 `div#side_right > div.card > h4.card-title > a`
推荐新闻 `div#side_right > div.card > h4.card-title > a`
战略合作：Chat2DB凌霞软件 `body > div#wrapper > footer#footer > div.ally-link`
Chat2DB `div#wrapper > footer#footer > div.ally-link > a`
凌霞软件 `div#wrapper > footer#footer > div.ally-link > a`
Powered by .NET 10.0 on Kubernetes `div#wrapper > footer#footer > div#footer_bottom > div.poweredby`
关于博客园 `footer#footer > div#footer_bottom > div.about > a`
联系我们 `footer#footer > div#footer_bottom > div.about > a`
商务合作 `footer#footer > div#footer_bottom > div.about > a`
企业博客 `footer#footer > div#footer_bottom > div.about > a`
企业发布 `footer#footer > div#footer_bottom > div.about > a`
Copyright © 2004-2026 博客园版权所有 `footer#footer > div#footer_bottom > div.about > span`
浙公网安备 33010602011771号 `div#footer_bottom > div.beian > a.gongan > span`
浙ICP备2021040463号-3 `footer#footer > div#footer_bottom > div.beian > a`
违法和不良信息举报中心 `footer#footer > div#footer_bottom > div.report-contact > a`
举报邮箱：contact@cnblogs.com `footer#footer > div#footer_bottom > div.report-contact > span`
网站举报中心 `footer#footer > div#footer_bottom > div.report-contact > a`

These are opportunities to improve the legibility of your content.

Names and labels

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul.navbar-list > li.dropdown > div.dropdown-button > img `ul.navbar-list > li.dropdown > div.dropdown-button > img`
div#side_right > div#cnblogs_b1 > a > img `div#side_right > div#cnblogs_b1 > a > img`
div#side_right > div#cnblogs_b2 > a > img `div#side_right > div#cnblogs_b2 > a > img`
div#side_right > div#cnblogs_b3 > a > img `div#side_right > div#cnblogs_b3 > a > img`
div#side_right > div#cnblogs_b4 > a > img `div#side_right > div#cnblogs_b4 > a > img`
div#footer_bottom > div.beian > a.gongan > img `div#footer_bottom > div.beian > a.gongan > img`

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 > div#wrapper > a `body > div#wrapper > a`
div#main > div#side_right > div#cnblogs_b1 > a `div#main > div#side_right > div#cnblogs_b1 > a`
div#main > div#side_right > div#cnblogs_b2 > a `div#main > div#side_right > div#cnblogs_b2 > a`
div#main > div#side_right > div#cnblogs_b3 > a `div#main > div#side_right > div#cnblogs_b3 > a`
div#main > div#side_right > div#cnblogs_b4 > a `div#main > div#side_right > div#cnblogs_b4 > a`

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

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul.navbar-list > li > form#zzk_search_mobile > input#zzk_search_input_mobile `ul.navbar-list > li > form#zzk_search_mobile > input#zzk_search_input_mobile`

These are opportunities to improve keyboard navigation in your application.

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
搜索 `ul.navbar-list > li > form#zzk_search_mobile > button#zzk_search_button_mobile`
» `div.card > ul > li > a.right_more`
» `div.card > ul > li > a.right_more`
» `div.card > ul > li > a.right_more`

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

●Buttons have an accessible name

●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.

●Document has a `<title>` element

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

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

●Links are distinguishable without relying on color.

●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

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●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

○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

○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

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

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

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

○ARIA IDs are unique

○No form fields have multiple labels

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

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

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○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.

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

○Elements with visible text labels have matching accessible names.

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

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

Best Practices

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3693259/20260319124404.png	48 x 48	48 x 48	72 x 72
博主头像 `div.post-item-text > p.post-item-summary > a > img.avatar`	pic.cnblogs.com/face/3784694/20260401160101.png	48 x 48	48 x 48	72 x 72

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.	hm.baidu.com/hm.js?866c9be12d4a814454792b1fd0fed295 line 1, col 274

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
www.cnblogs.com/	`Access to script at 'https://cdn-www.cnblogs.com/ng/main-ia2uqgxu.js' from origin 'https://www.cnblogs.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.`
www.cnblogs.com/	`Access to script at 'https://cdn-www.cnblogs.com/ng/polyfills-jq6heycx.js' from origin 'https://www.cnblogs.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.`
cdn-www.cnblogs.com/ng/main-ia2uqgxu.js	`Failed to load resource: net::ERR_FAILED`
cdn-www.cnblogs.com/ng/polyfills-jq6heycx.js	`Failed to load resource: net::ERR_FAILED`

●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

●Page has the HTML doctype

●Properly defines charset

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

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

SEO

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

Crawling and Indexing

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
`nav#nav_main > ul#nav_right > li#navbar_login_status > a#navbar_lite_mode_indicator`
简洁模式 ... `li#navbar_login_status > div#user_info > div#navbar_menu > a#navbar_lite_mode_toggle`
退出登录 `li#navbar_login_status > div#user_info > div#navbar_menu > a`
发现 `ul.navbar-list > li.dropdown > div.dropdown-button > a`
退出 `ul.navbar-list > li#user_info_mobile > div.dropdown-menu > a`
更多 `ul.sidenav > li#sidenav_more > div.dropdown-button > a`
div#side_nav > ul.sidenav > li#dark_switch > a `div#side_nav > ul.sidenav > li#dark_switch > a`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19890716`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19904194`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19903757`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19897604`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19903938`
1 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19903842`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19903293`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19903270`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902860`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902842`
3 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902722`
2 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902693`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902643`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19902499`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19901906`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19901796`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19901456`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19901328`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19899804`
0 `article.post-item > section.post-item-body > footer.post-item-foot > a#digg_control_19899767`

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
ul.navbar-list > li.dropdown > div.dropdown-button > img `ul.navbar-list > li.dropdown > div.dropdown-button > img`
div#side_right > div#cnblogs_b1 > a > img `div#side_right > div#cnblogs_b1 > a > img`
div#side_right > div#cnblogs_b2 > a > img `div#side_right > div#cnblogs_b2 > a > img`
div#side_right > div#cnblogs_b3 > a > img `div#side_right > div#cnblogs_b3 > a > img`
div#side_right > div#cnblogs_b4 > a > img `div#side_right > div#cnblogs_b4 > a > img`
div#footer_bottom > div.beian > a.gongan > img `div#footer_bottom > div.beian > a.gongan > img`

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`