Lighthouse Desktop

· 0 checks — Desktop 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.

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

items: [map[reflowTime:59.753 source:map[type:text value:[unattributed]]]]

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-IMG

nodeLabel: Images published by Iranian state media purporting to show the fighter jet wrec…

path: 1,HTML,1,BODY,13,MAIN,1,SECTION,3,DIV,0,UL,0,LI,0,DIV,0,DIV,2,DIV,0,DIV,0,GU-ISLAND,0,DIV,0,A,0,UL,0,LI,0,FIGURE,0,PICTURE,8,IMG

selector: li.dcr-11wtom7 > figure > picture.dcr-1ydxyte > img.dcr-l300o4

snippet: <img alt="Images published by Iranian state media purporting to show the fighter jet…" src="https://i.guim.co.uk/img/media/482982697628386efabd0a787d9590da0690e8a1/0_…" loading="eager" data-chromatic="ignore" class="dcr-l300o4">

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

value: No additional origins are good candidates for preconnecting

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
sourcepoint.theguardian.com/Notice.8f529.js	3600.0 s	91.2 KiB
sourcepoint.theguardian.com/unified/wrapperMessagingWithoutDetection.js	3600.0 s	42.1 KiB
/fonts/guss-webfonts/GuardianTextSansWeb/GuardianTextSans...	302400.0 s	38.8 KiB
/fonts/guss-webfonts/GuardianTextSansWeb/GuardianTextSans...	302400.0 s	35.6 KiB
sourcepoint.theguardian.com/Notice.30929.css	3600.0 s	6.7 KiB
interactive.guim.co.uk/fonts/garnett/GTGuardianTitlepiece-Bold.woff2	604800.0 s	26.1 KiB
sourcepoint.theguardian.com/polyfills.01516.js	3600.0 s	2.4 KiB
/polyfill.io/v3/polyfill.min.js?rum=0&features=es6%2Ces7%...	604800.0 s	0 B

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.

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
Golestan Palace, Tehran, a Unesco world heritage site `li.dcr-11wtom7 > figure > picture.dcr-1ydxyte > img.dcr-l300o4`	/img/media/42a87959721423d78d72379c3f03d67893269f28/747_0...	73.3 KiB	23.2 KiB
Donald Trump says 'Cuba's next' but what what does it mean? `div.dcr-pwlslf > button.dcr-rvfwnd > picture > img.dcr-1qi2at0`	/img/media/c93875fbb4f6e5c593d8b37c73f83f1a10bc0b57/47_0_...	37.7 KiB	17.7 KiB
Heavy damage at a laboratory in Shahid Beheshti University, Tehran, Iran `li.dcr-11wtom7 > figure > picture.dcr-1ydxyte > img.dcr-l300o4`	/img/media/ac994e5bae89ab034cb6ca8b0fc22355cff9a4bf/914_0...	67.7 KiB	17.6 KiB
The aftermath of an Israeli strike in Tyre, Lebanon `li.dcr-11wtom7 > figure > picture.dcr-1ydxyte > img.dcr-l300o4`	/img/media/3648d482d7ce8fa714cd974e6cee4b49f2226e60/760_0...	57.6 KiB	7.6 KiB
Images published by Iranian state media purporting to show the fighter jet wrec… `li.dcr-11wtom7 > figure > picture.dcr-1ydxyte > img.dcr-l300o4`	/img/media/482982697628386efabd0a787d9590da0690e8a1/0_0_5...	57.0 KiB	7.0 KiB
Aerial view of the Pentagon building. `div.dcr-9z444h > div.dcr-17jliau > picture.dcr-1ydxyte > img.dcr-l300o4`	/img/media/934755303f5380d328b0d1d9140a6be39d349d04/317_0...	13.0 KiB	6.7 KiB
Mock-up image of Charles as a circus master and Trump as a lion on a podium `div.dcr-8ierls > div.dcr-kkt25y > picture.dcr-19yn8oe > img.dcr-l300o4`	/img/media/ab78c5043708ff7ab60eb0838476927897628ee2/65_19...	92.5 KiB	6.2 KiB

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: 70 ms 149.1 KiB

URL	Transfer Size	Est Savings
sourcepoint.theguardian.com/Notice.8f529.js	90.8 KiB	61.4 KiB
assets.guim.co.uk/assets/index.client.web.18dee422f56822d692d5.js	167.2 KiB	53.7 KiB
assets.guim.co.uk/commercial/4209b0b7fab4ca3f32ab/graun.standalone.commercial.js	55.9 KiB	34.0 KiB

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: 235 ms

URL	Time Spent
www.theguardian.com/	235 ms
www.theguardian.com/international	0.0 ms

●Max Potential First Input Delay 70 ms

●Layout shift culprits

●Optimize DOM size

●Font display

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Time to Interactive 0.9 s

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 1,297 KiB

●User Timing marks and measures 142 user timings

●JavaScript execution time 0.4 s

●Minimizes main-thread work 1.4 s

●Avoid long main-thread tasks 2 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 180 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 40 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

Accessibility

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

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
Bally Bagayoko Newly elected French mayor on tackling the far right Simon Tisda… `div.dcr-1ykr3rf > gu-island > div.dcr-1beghel > ul.dcr-1tj3ydw`
Images published by Iranian state media purporting to show the fighter jet wrec… `gu-island > div.dcr-dz92n5 > a > ul.dcr-x0nc1o`

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

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
Video'You look beautiful': Artemis II crew makes contact from space `ul.sublinks > li.dcr-tkgy > div.dcr-1e8pf3e > a.dcr-1ij2qgb`
In picturesArtemis II lifts off from the Kennedy Space Center `ul.sublinks > li.dcr-tkgy > div.dcr-1e8pf3e > a.dcr-1ij2qgb`
ItalyGattuso exits as manager after World Cup qualifying failure `ul.sublinks > li.dcr-b5asvx > div.dcr-ak74t3 > a.dcr-1ij2qgb`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Images published by Iranian state media purporting to show the fighter jet wrec… `div.dcr-19y4zys > gu-island > div.dcr-dz92n5 > a`

○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

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[role]` values are valid

●`[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 with `role="dialog"` or `role="alertdialog"` have accessible names.

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

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

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

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

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

●Links are distinguishable without relying on color.

●Links have a discernible name

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

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

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

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

●Uses ARIA roles only on compatible elements

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○`<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.

○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>`.

○All heading elements contain content.

○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.

100

Best Practices

●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 browser errors logged to the console

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

●Ensure CSP is effective against XSS attacks

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

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.

Link destination	Link Text
www.theguardian.com/info/2024/feb/28/what-is-the-deeply-read-list	Learn more

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

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

Source: MDN Permissions-Policy

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

Crawling and Indexing

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 #	Content	Error
101	`License: https://theguardian.com/license.xml`	`Unknown directive`

To appear in search results, crawlers need access to your app.

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`