Lighthouse Mobile
· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| www.4.cn/js/static/gt.js | 2.6 KiB | |
| www.4.cn/js/front/jquery.min.js | 31.8 KiB | 295 ms |
| www.4.cn/js/front/punycode.js | 4.7 KiB | |
| www.4.cn/js/front/locale/index-en.js | 541 B | |
| www.4.cn/js/front/jquery.duomai.min.js | 1.1 KiB | |
| www.4.cn/js/front/jquery.index.min.js | 1.8 KiB | |
| www.4.cn/js/front/jquery.cxscroll.min.js | 1.2 KiB | |
| www.4.cn/js/front/jquery.flexslider-min.js | 5.4 KiB | |
| www.4.cn/js/front/locale/dialog-en.min.js | 345 B | |
| www.4.cn/js/front/jquery.dialog.min.js | 1.8 KiB | |
| www.4.cn/img/en/style.css | 1.7 KiB | |
| www.4.cn/js/front/css/jquery.dialog.css | 1.7 KiB | |
| www.4.cn/img/style.css | 12.6 KiB | |
| www.4.cn/img/html5-reset.css | 1.1 KiB | |
| www.4.cn/img/reset.css | 790 B | |
| www.4.cn/js/front/css/jquery.flexslider.css | 1.5 KiB | |
| www.4.cn/img/index.css | 4.1 KiB | 295 ms |
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
body > div#header > div.logo > a.phone body > div#header > div.logo > a.phone | www.4.cn/img/en/phone_2x.jpg | 26.8 KiB | 22.1 KiB |
body > div#header > div.logo > h1 body > div#header > div.logo > h1 | www.4.cn/img/en/logo_2x.png | 19.4 KiB | 6.6 KiB |
Tap interactions may be delayed by up to 300 ms if the viewport is not optimized for mobile.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.4.cn/js/front/punycode.js | 4.5 KiB | 2.9 KiB |
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.4.cn/img/style.css | 12.5 KiB | 11.1 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-9PR2G0XLTH&cx=c&_slc=1 | 145.7 KiB | 63.9 KiB |
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/icann.png |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/jb.gif |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/dp.gif |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/pl.gif |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img | www.4.cn/img/flag/facebook.gif |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img | www.4.cn/img/flag/twitter.gif |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Welcome to 4.CN Sign In Create an account body > div#top > div.wrapper > div.fl |
Sign In div#top > div.wrapper > div.fl > a.orange |
Create an account div#top > div.wrapper > div.fl > a.orange |
Top Domains div#top > div.wrapper > div.fr > a.orange |
Fee Policies div#top > div.wrapper > div.fr > a |
Help Center div#top > div.wrapper > div.fr > a |
Contact Us div#top > div.wrapper > div.fr > a |
div.search-wrap > form#handleSearch > div.search-text-container > input#keyword div.search-wrap > form#handleSearch > div.search-text-container > input#keyword |
BIN Sales div#nav > ul.fl > li > a.buynow-item |
Bulk Sales div#nav > ul.fl > li > a.bulk-item |
Hot Sales div#nav > ul.fl > li > a.hotsale-item |
Live Auction div#nav > ul.fl > li > a.auction-item |
Buy Domains div#nav > ul.fl > li > a.buy-domains-item |
Sell Domains div#nav > ul.fl > li > a.sell-domains-item |
Escrow div#nav > ul.fl > li > a.escrow-item |
More >> div.gray-head > h2.head-h2 > span.fr > a.more |
Category div.body > ol.list > li.cap > span.category |
Listing Price div.body > ol.list > li.cap > span.price |
Shopping div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
¥420,000 CNY div.body > ol.list > li > span.price |
Uncategoried div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
Acronyms div.body > ol.list > li > span.category |
$31,888 USD div.body > ol.list > li > span.price |
Computers div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
Category div.body > ol.list > li.cap > span.category |
Listing Price div.body > ol.list > li.cap > span.price |
Uncategoried div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
Business div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
Uncategoried div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
Uncategoried div.body > ol.list > li > span.category |
¥300,000 CNY div.body > ol.list > li > span.price |
Uncategoried div.body > ol.list > li > span.category |
make offer div.body > ol.list > li > span.price |
div.login > form#index_login > div.ftext-wrap > input#username div.login > form#index_login > div.ftext-wrap > input#username |
div.login > form#index_login > div.ftext-wrap > input#password div.login > form#index_login > div.ftext-wrap > input#password |
Sign In form#index_login > p > button.sub-btn > span |
Create an account div.login > form#index_login > p > a.reg_btn |
div.entrust-box > dl.clearfix > dd > input.domain-name div.entrust-box > dl.clearfix > dd > input.domain-name |
div.entrust-box > dl.clearfix > dd > input.budget div.entrust-box > dl.clearfix > dd > input.budget |
I have an account dl.clearfix > dd > label > span |
I am a new customer dl.clearfix > dd > label > span |
dl.clearfix > dd#loginForm > div.ftext-wrap > input dl.clearfix > dd#loginForm > div.ftext-wrap > input |
dl.clearfix > dd#loginForm > div.ftext-wrap > input dl.clearfix > dd#loginForm > div.ftext-wrap > input |
Brokerage form#applybrokerage > div.entrust-box > p > a#submit |
Time Left div.body > ol#closing_auctions > li.cap > span.time |
Current Bid div.body > ol#closing_auctions > li.cap > span.price |
Listing Price div.body > ol#featured_hotsale > li.cap > span.price |
浙公网安备 33010402000519号 div.wrap > div > a > p |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.search-wrap > form#handleSearch > div.search-text-container > input#keyword div.search-wrap > form#handleSearch > div.search-text-container > input#keyword |
div.login > form#index_login > div.ftext-wrap > input#username div.login > form#index_login > div.ftext-wrap > input#username |
div.login > form#index_login > div.ftext-wrap > input#password div.login > form#index_login > div.ftext-wrap > input#password |
div.entrust-box > dl.clearfix > dd > input.domain-name div.entrust-box > dl.clearfix > dd > input.domain-name |
div.entrust-box > dl.clearfix > dd > input.budget div.entrust-box > dl.clearfix > dd > input.budget |
dl.clearfix > dd#loginForm > div.ftext-wrap > input dl.clearfix > dd#loginForm > div.ftext-wrap > input |
Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
CNY
USD
EUR div.entrust-box > dl.clearfix > dd > select#BudgetCurrency |
Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
body > div#footer > div.wrap > iframe body > div#footer > div.wrap > iframe |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
body > div#footer > div.wrap > a |
body > div#footer > div.wrap > a |
body > div#footer > div.wrap > a |
body > div#footer > div.wrap > 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.
Best practices
One main landmark helps screen reader users navigate a web page. Learn more about landmarks.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
html html |
These items highlight common accessibility best practices.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Displayed size | Actual size | Expected size | |
|---|---|---|---|---|
Web site recommended by Domaining.com div#footer > div.wrap > a > img | partner.domaining.com/Award/domaining-120x31.gif | 120 x 31 | 120 x 31 | 180 x 47 |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/icann.png | 55 x 55 | 55 x 55 | 83 x 83 |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/jb.gif | 44 x 38 | 44 x 38 | 66 x 57 |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/dp.gif | 39 x 38 | 39 x 38 | 59 x 57 |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img | www.4.cn/img/award/pl.gif | 38 x 38 | 38 x 38 | 57 x 57 |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img | www.4.cn/img/flag/facebook.gif | 15 x 15 | 15 x 15 | 23 x 23 |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img | www.4.cn/img/flag/twitter.gif | 15 x 15 | 15 x 15 | 23 x 23 |
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
Failed to load resource: net::ERR_NAME_NOT_RESOLVED |
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 are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.
Performance issues directly impact user engagement and conversion rates.
| Blocking Directive Source |
|---|
https://www.4.cn/robots.txt |
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
Performance issues directly impact user engagement and conversion rates.
| Uncrawlable Link |
|---|
Brokerage form#applybrokerage > div.entrust-box > p > a#submit |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img |
div.fr > span.nav-tool > a > img div.fr > span.nav-tool > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
div#footer > div.wrap > a > img div#footer > div.wrap > a > img |
Format your HTML in a way that enables crawlers to better understand your app’s content.