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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.

45

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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

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:483.903 source:map[column:183781 line:1 type:source-location url:https://asana.com/_next/static/chunks/framework-e5fb0dd7fe072789.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 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:178.982 source:map[type:text value:[unattributed]]] map[reflowTime:6.622 source:map[column:7165 line:0 type:source-location url:https://asana.com/_next/static/chunks/88743-edc16fc1a8179f5a.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:113.677 source:map[column:164038 line:0 type:source-location url:https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:197.169 source:map[column:164540 line:0 type:source-location url:https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:129.526 source:map[column:164586 line:0 type:source-location url:https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:0.891 source:map[column:47485 line:0 type:source-location url:https://asana.com/_next/static/chunks/75311-0282f6f55d7fe731.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:20.251 source:map[column:162791 line:0 type:source-location url:https://asana.com/_next/static/chunks/pages/_app-236bbd23a55394b9.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:0.87 source:map[column:3487 line:0 type:source-location url:https://asana.com/_next/static/chunks/10012.c5300d4af375cd99.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]] map[reflowTime:14.897 source:map[column:51438 line:0 type:source-location url:https://asana.com/_next/static/chunks/19357-5b0117ee4b7da39c.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637 urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Amplify your impact with AI image div.css-dbksp > div.css-lhkx71 > picture.css-l2evne > img
/transform/9c192ab3-d6e7-483b-abed-b2e08ba2e6c0/homepage_...42.9 KiB33.9 KiB
Asana product UI of AI Teammate Use Cases div.w-css-reset > div > div.w-css-reset > img.w-css-reset
/deliveries/5db8175a0d68c14dcbed7b9fcc50dbac.webp?image_c...50.4 KiB31.0 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:500.8170009765625 label:Time to first byte subpart:timeToFirstByte] map[duration:3050.9769990234377 label:Resource load delay subpart:resourceLoadDelay] map[duration:139.778 label:Resource load duration subpart:resourceLoadDuration] map[duration:41.66 label:Element render delay subpart:elementRenderDelay]]
lhId: page-1-IMG
nodeLabel: Asana product UI of AI Teammate Use Cases
path: 1,HTML,1,BODY,6,DIV,0,DIV,2,DIV,0,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,WISTIA-PLAYER,a,#document-fragment,1,DIV,0,DIV,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,IMG
selector: div.w-css-reset > div > div.w-css-reset > img.w-css-reset
snippet: <img class="w-css-reset" srcset="https://embed-ssl.wistia.com/deliveries/5db8175a0d68c14dcbed7b9fcc50dbac.w…" src="https://embed-ssl.wistia.com/deliveries/5db8175a0d68c14dcbed7b9fcc50dbac.w…" alt="Asana product UI of AI Teammate Use Cases" style="background-color: rgb(0, 0, 0); height: 100%; object-fit: contain;">

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-1-IMG
nodeLabel: Asana product UI of AI Teammate Use Cases
path: 1,HTML,1,BODY,6,DIV,0,DIV,2,DIV,0,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,WISTIA-PLAYER,a,#document-fragment,1,DIV,0,DIV,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,IMG
selector: div.w-css-reset > div > div.w-css-reset > img.w-css-reset
snippet: <img class="w-css-reset" srcset="https://embed-ssl.wistia.com/deliveries/5db8175a0d68c14dcbed7b9fcc50dbac.w…" src="https://embed-ssl.wistia.com/deliveries/5db8175a0d68c14dcbed7b9fcc50dbac.w…" alt="Asana product UI of AI Teammate Use Cases" style="background-color: rgb(0, 0, 0); height: 100%; object-fit: contain;">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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
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.

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: 311 ms
URLTime Spent
www.asana.com/311 ms
asana.com/0.0 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 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.

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

CategoryTime Spent
Script Evaluation3.1 s
Other1.4 s
Style & Layout806 ms
Script Parsing & Compilation182 ms
Garbage Collection86 ms
Parse HTML & CSS72 ms
Rendering70 ms

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 12.4 KiB
URLTransfer SizeEst Savings
asana.com/assets/dist/hashed/css/reskin-6a3c245d65.css61.3 KiB12.4 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 8.4 KiB
URLTransfer SizeEst Savings
asana.com/assets/dist/hashed/js/global-7258b96615.js16.7 KiB8.4 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 71.9 KiB

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

Layout shift culprits
Optimize DOM size
Modern HTTP
Optimize viewport for mobile
User Timing marks and measures 9 user timings
Avoid long main-thread tasks 5 long tasks found
Image elements have explicit `width` and `height`
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 40 ms
Server Backend Latencies 270 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 300 ms
Avoid large layout shifts 2 layout shifts found
INP breakdown
Avoid non-composited animations
80

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

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Choose your preferred language div._nav_language-selector__4JrcF > div.css-yuiwnc > button._nav_language-selector__select__oOIIR > div#language-selector
Terms div.siteFooter__secondary__col > div.terms-and-privacy > div.css-yuiwnc > div#/terms
Privacy div.siteFooter__secondary__col > div.terms-and-privacy > div.css-yuiwnc > div#/terms/privacy-statement
Download the Asana iOS app div.siteFooter__secondary__col-wrapper > div.siteFooter__secondary__col > div.css-yuiwnc > div#https://itunes.apple.com/us/app/asana-mobile/id489969512?mt=8
Download the Asana Android app div.siteFooter__secondary__col-wrapper > div.siteFooter__secondary__col > div.css-yuiwnc > div#https://play.google.com/store/apps/details?id=com.asana.app

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
Resource planning Visualize how teams are staffed and what resources are avail… div.slick-slider > div.slick-list > div.slick-track > div.slick-slide
Goal management Connect everyone's work to the organizational goals they suppo… div.slick-slider > div.slick-list > div.slick-track > div.slick-slide
Employee onboarding Standardize onboarding to help new employees make an impac… div.slick-slider > div.slick-list > div.slick-track > div.slick-slide
Microsoft Teams div.css-1ik4zij > div.css-1eebgoq > div.css-1adq0r4 > div.appMarquee-row

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
85% of Fortune 100 companies choose Asana¹ div.css-1i6a9mr > div.css-4ofcuc > div.css-1t6egar > h4.css-mai43k
Campaign management div.css-1tj5lnt-link-2 > div.css-c10hy > div > h5#info-card-title-campaign-management
Stay secure and compliant with Asana Gov div.css-zt3vru > div.css-allxq9-p1-p2-p1 > div.css-0 > h5
Simon Levinson div.css-vii74e > div.css-j0ozid > div.css-1kuaip6 > h6
Try the Asana demo div.css-8ulzpr > a.css-1pf1mn9 > div.css-n01hrm > h4.css-rqx2h3

These are opportunities to improve keyboard navigation in your application.

Names and labels

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.css-15st4et > div.css-l00654 > div.css-1tjylrs > a div.css-15st4et > div.css-l00654 > div.css-1tjylrs > 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.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Contact sales View demo Download app header._nav_header__7tbaV > div._nav_desktop-drawer__qquVR > div._nav_dropdown-footer__4avDy > ul._nav_dropdown-footer__buttons__F4Vxf
Marketing Operations IT Leadership div.css-1eebgoq > div.css-fiaey7 > div.css-16e6i3h > ul.css-5x05ay

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

Best practices

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-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s have all required `[aria-*]` attributes
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
Image elements have `[alt]` attributes
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`button`, `link`, and `menuitem` elements have accessible names
ARIA attributes are used as specified for the element's role
Elements use only permitted ARIA attributes
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
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.
Deprecated ARIA roles were not used
ARIA IDs are unique
`<video>` elements contain a `<track>` element with `[kind="captions"]`
All heading elements contain content.
Uses ARIA roles only on compatible elements
Identical links have the same purpose.
Elements with visible text labels have matching accessible names.
`[accesskey]` values are unique
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 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
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
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
Form elements have associated labels
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
Tables have different content in the summary attribute and `<caption>`.
Image elements do not have `[alt]` attributes that are redundant text.
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.
92

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
Cannot read properties of undefined (reading '__k')
Failed to load resource: the server responded with a status of 401 ()
Loading the script 'https://browser.sentry-cdn.com/9.6.1/bundle.min.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' https://www.google.com/recaptcha/ https://www.gstatic.com/recaptcha/ https://ajax.aspnetcdn.com https://bat.bing.com https://sjs.bizographics.com https://ct.capterra.com https://googleads.g.doubleclick.net https://connect.facebook.net https://tracking.g2crowd.com https://www.google-analytics.com https://apis.google.com https://www.googleadservices.com https://*.googleapis.com https://tpc.googlesyndication.com https://www.googletagmanager.com https://ssl.gstatic.com https://cdn.jotfor.ms https://form.jotform.us https://snap.licdn.com https://px.ads.linkedin.com https://www.linkedin.com https://luna1.co https://js.recurly.com https://fast.wistia.com https://fast.wistia.net https://www.youtube.com https://s.ytimg.com https://*.marketo.com https://*.marketo.net https://cdnjs.cloudflare.com https://api.ipify.org https://cdn.pdst.fm https://*.vimeocdn.com https://resources.asana.com https://w58858w0sjxx.statuspage.io https://cdn.cookielaw.org https://geolocation.onetrust.com https://*.logs.datadoghq.com https://www.datadoghq-browser-agent.com https://tagmanager.google.com/debug https://t.contentsquare.net contentsquare.com app.contentsquare.com https://cdn.jsdelivr.net/npm/@sheerid/jslib@1/ https://v2.listenloop.com https://boards.greenhouse.io/embed/job_board/js https://job-boards.greenhouse.io https://www.redditstatic.com/ads/pixel.js https://yjtag.jp/tag.js https://s.yjtag.jp/tag.js https://s.yimg.jp/ https://yjtag.yahoo.co.jp/tag https://analytics.tiktok.com/i18n/pixel/ https://s.pinimg.com/ct/ https://b92.yahoo.co.jp/rt/ https://t-antenna.asana.com/ https://scripts.postie.com/wbgboxjj/lp.1.js https://b91.yahoo.co.jp/pagead/ https://b98.yahoo.co.jp/ https://accounts.google.com/gsi/client https://js.adstk.io/convpixel.js https://a.quora.com/qevents.js https://d34r8q7sht0t9k.cloudfront.net/tag.js https://collector-39548.us.tvsquared.com/tv2track.js https://*.qualified.com https://static.xingcdn.com/xingtrk/index.js https://ct.pinterest.com/static/ct/token_create.js https://*.6sc.co https://*.6sense.com https://js.zi-scripts.com/ https://*.mountain.com/ https://c0.adalyser.com/adalyser.js https://dyv6f9ner1ir9.cloudfront.net/assets/js/nloader.js https://pagead2.googlesyndication.com https://c.amazon-adsystem.com/aat/amzn.js https://*.optimizely.com https://optimizely.s3.amazonaws.com https://tr.capterra.com https://pixel.byspotify.com/ping.min.js". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked.
TypeError: Cannot read properties of undefined (reading '__k') at c.__ (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:552169) at V (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:9285) at e.value (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:640697) at e.<anonymous> (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:639475) at e.y (https://asana.com/_next/static/chunks/28fafed5.1d9eba965cb4ac03.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637:1:169128) at e.v (https://asana.com/_next/static/chunks/28fafed5.1d9eba965cb4ac03.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637:1:168944) at e.trigger (https://asana.com/_next/static/chunks/28fafed5.1d9eba965cb4ac03.js?dpl=8354dcc07986847a71dc14f1ee1c2c2a2bda738c46de2d29401737ba56b44b73363964353262633735333530303230303038626238636637:1:173211) at n.trigger (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:398357) at n (https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:469626) at https://fast.wistia.com/assets/external/publicApi.js@0.1.7:1:470910
Uncaught (in promise) SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy
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
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
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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

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Document has a meta description
Page has successful HTTP status code
Links are crawlable
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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