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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

73

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.

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:859.519 label:Time to first byte subpart:timeToFirstByte] map[duration:2950.912 label:Resource load delay subpart:resourceLoadDelay] map[duration:13.427 label:Resource load duration subpart:resourceLoadDuration] map[duration:55.285 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-DIV
nodeLabel: div.container > div.back > div.items > div.item
path: 1,HTML,1,BODY,0,DIV,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV
selector: div.container > div.back > div.items > div.item
snippet: <div class="item item1" style="background-image: url(&quot;https://img.alicdn.com/tps/TB1h9xxIFXXXXbKXXXXXXXXX…&quot;);">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV
nodeLabel: div.container > div.back > div.items > div.item
path: 1,HTML,1,BODY,0,DIV,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV
selector: div.container > div.back > div.items > div.item
snippet: <div class="item item1" style="background-image: url(&quot;https://img.alicdn.com/tps/TB1h9xxIFXXXXbKXXXXXXXXX…&quot;);">

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
render-intl.alipayobjects.com/p/yuyan/180020010001265696/main-dc280f4e.js152.9 KiB480 ms
gw.alipayobjects.com/render/p/yuyan/180020010001278576/umi.d499ff16.js219.1 KiB226 ms
gw.alipayobjects.com/os/lib/moment/2.30.1/min/moment-with-locales.min.js75.2 KiB113 ms
gw.alipayobjects.com/os/lib/lodash/4.17.21/lodash.min.js25.7 KiB57 ms
gw.alipayobjects.com/os/lib/history/5.3.0/umd/history.production.min.js2.5 KiB
gw.alipayobjects.com/os/lib/jquery/3.7.1/dist/jquery.min.js30.1 KiB57 ms
gw.alipayobjects.com/render/p/yuyan/180020010001278576/framework.292e2c8b.js51.4 KiB113 ms
gw.alipayobjects.com/os/lib/dayjs/1.11.13/dayjs.min.js3.5 KiB
gw.alipayobjects.com/render/p/yuyan/180020010001278576/umi.9734f39a.css1.9 KiB279 ms

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

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

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 280 ms 244.2 KiB
URLTransfer SizeEst Savings
render-intl.alipayobjects.com/p/yuyan/180020010001265696/main-dc280f4e.js151.1 KiB101.4 KiB
gw.alipayobjects.com/render/p/yuyan/180020010001278576/umi.d499ff16.js218.8 KiB101.1 KiB
gw.alipayobjects.com/os/lib/jquery/3.7.1/dist/jquery.min.js29.7 KiB21.4 KiB
gw.alipayobjects.com/os/lib/moment/2.30.1/min/moment-with-locales.min.js74.7 KiB20.3 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.main > div.header > div.nav > img.ipv6 div.main > div.header > div.nav > img.ipv6
img.alicdn.com/tfs/TB1DeJxnAY2gK0jSZFgXXc5OFXa-86-64.png

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 786 ms
URLTime Spent
alipay.com/786 ms
www.alipay.com/0.0 ms
●Time to Interactive 2.4 s
●Max Potential First Input Delay 80 ms
●Use efficient cache lifetimes
●Layout shift culprits
●Optimize DOM size
●Font display
●Forced reflow
●Improve image delivery
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoids enormous network payloads Total size was 729 KiB
●User Timing marks and measures 8 user timings
●JavaScript execution time 0.1 s
●Minimizes main-thread work 0.3 s
●Avoid long main-thread tasks 1 long task found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 190 ms
●Server Backend Latencies 240 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 60 ms
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
54

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.

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.main > div.header > div.nav > img.ipv6 div.main > div.header > div.nav > img.ipv6

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.main > div.footer > div.nav-icons > a.pic1 div.main > div.footer > div.nav-icons > a.pic1
div.main > div.footer > div.nav-icons > a.pic2 div.main > div.footer > div.nav-icons > a.pic2
div.main > div.footer > div.nav-icons > a.pic3 div.main > div.footer > div.nav-icons > a.pic3
div.main > div.footer > div.nav-icons > a.pic4 div.main > div.footer > div.nav-icons > a.pic4
div.main > div.footer > div.nav-icons > a.pic7 div.main > div.footer > div.nav-icons > a.pic7

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

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
经营许可证编号：合字B2-20190046 div.footer > div.ownership > span > a

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>`
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●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
●Document has a main landmark.
●The page contains a heading, skip link, or landmark region
○`[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
○`<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
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
96

Best Practices

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.

SourceDescription
/webgwcommon/commom/authcenter/userInfo?ctoken=bigfish_ct...
Failed to load resource: the server responded with a status of 401 ()
●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 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
75

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
我是服务商 div.wrap > div.mid > div.main-entry > a.developer-login
我是开发者 div.wrap > div.mid > div.main-entry > a.personal-developer-login
我是商家用户 div.wrap > div.mid > div.main-entry > a.seller-login
我是机构用户 div.wrap > div.mid > div.main-entry > a.merchant-login
我是个人用户 div.wrap > div.mid > div.main-entry > a.personal-login

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 #ContentError
1<!DOCTYPE html>Syntax not understood
2<html>Syntax not understood
3<head>Syntax not understood
4<meta charset="utf-8"><meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="baidu-site-verification" content="OyUb4RVdSe"><meta name="google-site-verification" content="w558w9pAuBKGToxYeisT6x7mBMEC4YengxILNxXag68"><meta name="renderer" content="webkit"><meta name="keywords" content="支付宝,电子支付/网上支付/安全支付/手机支付,安全购物/网络购物付款/付款/收款,水电煤缴费/信用卡还款/AA收款,支付宝网站"><meta name="description" content="支付宝，全球领先的独立第三方支付平台，致力于为广大用户提供安全快速的电子支付/网上支付/安全支付/手机支付体验，及转账收款/水电煤缴费/信用卡还款/AA收款等生活服务应用。">Syntax not understood
5<script type="tern-site-config">{"yuyanId":"180020010001278576","name":"alipay-home-new","presets":[{"name":"alipay-home-new","yuyanId":"180020010001278576","isUnio":true,"entry":"https://render.alipay.com/p/yuyan/180020010001278576/","version":"latest","env":"PROD","network":"INTERNET","props":{"routes":[],"apps":[]}}],"apps":[],"mode":"cloud","version":"S090011252180","orchestration":["alipay-home-new"],"metadata":{"favicon":"https://mdn.alipayobjects.com/rms/afts/file/A*7EyORZxdNDkAAAAAAAAAAAAAARQnAQ","metas":[],"title":"支付宝","links":[]},"responseRewrites":[],"xframe":true,"authType":"custom","experienceConfig":{},"monitor":true,"indexAppConfig":{"authType":"antbuservice","metadata":{"title":"支付宝","favicon":"https://i.alipayobjects.com/common/favicon/favicon.ico"},"appName":"alipay-home-new","version":"1.0.0","antdVersion":"5.26.2","bigfishVersion":"4.3.11","yuyanId":"180020010001278576","sprintId":"S090011252180","buildTime":1752561385116,"createTime":"","proxy":{"mode":"cors","PROD":{"/webgwcommon":{"target":"https://webgw-internet.alipay.com","mode":"cors"}}}}}</script><meta charset="utf-8"><meta name="tern-framework-version" content="S090011471365"><script>window.injectInfo = { env: "PROD" };</script><script>window.publicPath = "https://render-intl.alipayobjects.com/p/yuyan/180020010001265696/";</script><script>(function() {Unknown directive
6 if (window.document.documentMode && !window.__POWERED_BY_QIANKUN__) {Syntax not understood
7 var winPublicPath = window.publicPath || '/';Syntax not understood
8 var publicPathWithoutSlash = winPublicPath.substring(0, winPublicPath.length-1);Syntax not understood
9 document.writeln('<script src="'+publicPathWithoutSlash+'/polyfill-550f37da.js" crossorigin="anonymous"><\/script>');Syntax not understood
10 }Syntax not understood
11 })();</script><!-- ternbaseEnv: prod -->Unknown directive
12<script>window.__TERN__ = {"ssr":true,"x-ldcid-level":null,"x-user-group":null,"env":"PROD","user":{"clientUser":null},"_localDev":false,"netType":"INTERNET","tenant":"ALIPW3CN","logoutUrl":"","webgw":{"webgwDomain":"webgw-internet.alipay.com"}};</script><script src="https://render-intl.alipayobjects.com/p/yuyan/180020010001265696/main-dc280f4e.js" crossorigin="anonymous"></script><title>支付宝</title>Unknown directive
13<link rel="shortcut icon" href="https://mdn.alipayobjects.com/rms/afts/file/A*7EyORZxdNDkAAAAAAAAAAAAAARQnAQ">Unknown directive
15<script>window.injectInfo = { env: "PROD" };</script><script>window.publicPath = "https://gw.alipayobjects.com/render/p/yuyan/180020010001278576/";</script><script type="dependencymap">{"dependencies": {"dayjs":{"url":"https://gw.alipayobjects.com/os/lib/dayjs/1.11.13/dayjs.min.js","version":"1.11.13","range":"^1.0.0"},"history":{"url":"https://gw.alipayobjects.com/os/lib/history/5.3.0/umd/history.production.min.js","version":"5.3.0","range":"^5.0.0"},"jquery":{"url":"https://gw.alipayobjects.com/os/lib/jquery/3.7.1/dist/jquery.min.js","version":"^3.7.1","range":"^3.7.1"},"lodash":{"url":"https://gw.alipayobjects.com/os/lib/lodash/4.17.21/lodash.min.js","version":"4.17.21","range":"^4.0.0"},"moment":{"url":"https://gw.alipayobjects.com/os/lib/moment/2.30.1/min/moment-with-locales.min.js","version":"2.30.1","range":"^2.0.0"}}}</script>Unknown directive
26<link rel="icon" href="https://img.alicdn.com/tfs/TB1qEwuzrj1gK0jSZFOXXc7GpXa-32-32.ico" type="image/x-icon">Unknown directive
27<link rel="shortcut" href="https://img.alicdn.com/tfs/TB1qEwuzrj1gK0jSZFOXXc7GpXa-32-32.ico" type="image/x-icon">Unknown directive
28<link rel="stylesheet" href="https://gw.alipayobjects.com/render/p/yuyan/180020010001278576/umi.9734f39a.css">Unknown directive
29<script src="https://gw.alipayobjects.com/render/p/yuyan/180020010001278576/framework.292e2c8b.js" crossorigin="anonymous"></script>Unknown directive
30<script crossorigin="" src="https://gw.alipayobjects.com/os/lib/dayjs/1.11.13/dayjs.min.js"></script>Unknown directive
31<script crossorigin="" src="https://gw.alipayobjects.com/os/lib/history/5.3.0/umd/history.production.min.js"></script>Unknown directive
32<script crossorigin="" src="https://gw.alipayobjects.com/os/lib/jquery/3.7.1/dist/jquery.min.js"></script>Unknown directive
33<script crossorigin="" src="https://gw.alipayobjects.com/os/lib/lodash/4.17.21/lodash.min.js"></script>Unknown directive
34<script crossorigin="" src="https://gw.alipayobjects.com/os/lib/moment/2.30.1/min/moment-with-locales.min.js"></script>Unknown directive
36<script type="umi-route-chunk-files-map">{"p":"alipay-home-new","b":"mako","f":[["aec481dc-async.49944947.js","aec481dc"],["53d642ca-async.d40916c9.css","53d642ca"],["53d642ca-async.68507aa0.js","53d642ca"],["0c4c3265-async.82ee5dea.js","0c4c3265"],["0c4c3265-async.66da9ceb.css","0c4c3265"],["fd42c451-async.53b46b11.css","fd42c451"],["fd42c451-async.4cd208cb.js","fd42c451"],["883fd9e7-async.abd58096.js","883fd9e7"],["883fd9e7-async.11c466ab.css","883fd9e7"],["a10a3151-async.efe93249.css","a10a3151"],["a10a3151-async.5c5c1a29.js","a10a3151"],["lib-async.4f0c9598.js","lib"],["shared_qCZhedEt-async.b9b702fe.js","shared_qCZhedEt"],["shared_qCZhedEt-async.fcd14513.css","shared_qCZhedEt"]],"r":{"/":[9,10,11],"/index.html":[9,10,11],"/index.htm":[9,10,11],"/notfound.html":[1,2,11,12,13],"/404.htm":[1,2,11,12,13],"/x/personal":[7,8,11],"/x/constructing.htm":[5,6,11,12,13],"/x/kill-ie.htm":[3,4,11,12,13],"/x/notfound.htm":[1,2,11,12,13],"/x/notFound.htm":[1,2,11,12,13]}}</script>Unknown directive
38</head>Syntax not understood
39<body>Syntax not understood
41<div id="root"></div>Syntax not understood
42<script src="https://gw.alipayobjects.com/render/p/yuyan/180020010001278576/umi.d499ff16.js" entry="" crossorigin="anonymous"></script>Unknown directive
45 </body>Syntax not understood
46</html>Syntax not understood

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.main > div.header > div.nav > img.ipv6 div.main > div.header > div.nav > img.ipv6

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
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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