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.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.369952] map[node:map[boundingRect:map[bottom:657 height:64 left:38 right:1312 top:593 width:1274] lhId:page-15-P nodeLabel:We license, regulate, advise and provide guidance to the individuals and busine… path:1,HTML,1,BODY,8,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,2,P selector:div.govuk-width-container > div.govuk-grid-row > div.govuk-grid-column-full > p snippet:<p> type:node] score:0.188173 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:371 height:59 left:38 right:258 top:312 width:220] lhId:page-5-IMG nodeLabel:Gambling Commission logo. The logo contains the word 'Gambling' on top of word … path:1,HTML,1,BODY,6,HEADER,0,DIV,0,DIV,0,A,0,IMG selector:div.gcweb-width-container > div.gcweb-header__logo > a.gcweb-header__link > img snippet:<img src="https://images.ctfassets.net/j16ev64qyf6l/2ntAXPE2PlYnt3FGJpuVtf/ba119b1b3…" alt="Gambling Commission logo. The logo contains the word 'Gambling' on top of …"> type:node]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/nunito/v32/XRXV3I6Li01BKofINeaBTMnFcQ.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:3749 height:3288 left:0 right:1350 top:461 width:1350] lhId:page-9-MAIN nodeLabel:Helping you get information about gambling in Great Britain and find support wh… path:1,HTML,1,BODY,8,MAIN selector:body.govuk-template__body > main#main-content snippet:<main tabindex="-1" class="app-main-class" id="main-content"> type:node] score:0.181169 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:371 height:59 left:38 right:258 top:312 width:220] lhId:page-5-IMG nodeLabel:Gambling Commission logo. The logo contains the word 'Gambling' on top of word … path:1,HTML,1,BODY,6,HEADER,0,DIV,0,DIV,0,A,0,IMG selector:div.gcweb-width-container > div.gcweb-header__logo > a.gcweb-header__link > img snippet:<img src="https://images.ctfassets.net/j16ev64qyf6l/2ntAXPE2PlYnt3FGJpuVtf/ba119b1b3…" alt="Gambling Commission logo. The logo contains the word 'Gambling' on top of …"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:922 height:66 left:928 right:1291 top:857 width:363] lhId:page-13-P nodeLabel:Visit the hub about gambling licence information, guidance and advice for busin… path:1,HTML,1,BODY,8,MAIN,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,2,P selector:div.govuk-grid-row > div.govuk-grid-column-one-third > div.gcweb-panel > p.gcweb-body snippet:<p class="gcweb-body"> type:node] score:0.000558 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:371 height:59 left:38 right:258 top:312 width:220] lhId:page-5-IMG nodeLabel:Gambling Commission logo. The logo contains the word 'Gambling' on top of word … path:1,HTML,1,BODY,6,HEADER,0,DIV,0,DIV,0,A,0,IMG selector:div.gcweb-width-container > div.gcweb-header__logo > a.gcweb-header__link > img snippet:<img src="https://images.ctfassets.net/j16ev64qyf6l/2ntAXPE2PlYnt3FGJpuVtf/ba119b1b3…" alt="Gambling Commission logo. The logo contains the word 'Gambling' on top of …"> type:node]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/spartan/v22/l7gfbjR61M69yt8Z2QKtlAXJExs.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:282 height:37 left:178 right:358 top:245 width:181] lhId:page-7-LI nodeLabel:Licensees and businesses path:1,HTML,1,BODY,5,NAV,0,DIV,0,DIV,0,UL,1,LI selector:div.govuk-width-container > div.flex-nav > ul.flex-left > li snippet:<li> type:node] score:5.2e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:3090 height:170 left:691 right:992 top:2920 width:301] lhId:page-0-IMG nodeLabel:Photo of Commission Head of Data Innovation Hub Tim Livesley alongside the blog… path:1,HTML,1,BODY,8,MAIN,4,DIV,0,DIV,0,DIV,1,DIV,4,DIV,0,UL,0,LI,0,DIV,0,DIV,0,IMG selector:li.card > div.meta > div.img > img snippet:<img src="//images.ctfassets.net/j16ev64qyf6l/6EhW9Fs3LXtv2yGwzs8RD6/2f032dec7c0ac3e…" alt="Photo of Commission Head of Data Innovation Hub Tim Livesley alongside the…"> type:node]]] type:subitems]]]

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
Photo of Commission Head of Data Innovation Hub Tim Livesley alongside the blog… `li.card > div.meta > div.img > img`	/j16ev64qyf6l/6EhW9Fs3LXtv2yGwzs8RD6/2f032dec7c0ac3ef49b5...	161.2 KiB	152.8 KiB
A picture of a crowd of people at a fate. Above the crowd of people is a contin… `li.card > a > div.img > img`	/j16ev64qyf6l/2T4vdexwuKX09KL8M6iTGU/4c0ae70acea170e2898f...	111.5 KiB	103.8 KiB
Picture of a gambling slot machine.Picture of a gambling slot machine. The slot… `li.card > a > div.img > img`	/j16ev64qyf6l/5GTaAzXJgGYUjkTg12XJ3P/674c17ad0c2b49169a90...	46.3 KiB	38.6 KiB
A picture of someone's lower arms with them sitting down at a table with a lapt… `li.card > a > div.img > img`	/j16ev64qyf6l/2jMEUcwohaEYZeydMsXPx1/41af0a6e548140926d1f...	31.1 KiB	24.0 KiB
A picture of Helen Rhodes is displayed on the right hand side of the image, whi… `li.card > div.meta > div.img > img`	/j16ev64qyf6l/28vB0ILLOz6yxww1C6OVYH/9d8a484672e9aa318ca4...	23.4 KiB	17.4 KiB
Gambling Commission logo. The logo contains the word 'Gambling' on top of word … `div.gcweb-width-container > div.gcweb-header__logo > a.gcweb-header__link > img`	/j16ev64qyf6l/2ntAXPE2PlYnt3FGJpuVtf/ba119b1b32ddb454e30e...	7.6 KiB	5.5 KiB

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.gamblingcommission.gov.uk/	http/1.1
www.gamblingcommission.gov.uk/public/stylesheets/cdnapplication.css	http/1.1
www.gamblingcommission.gov.uk/public/stylesheets/application.css	http/1.1
www.gamblingcommission.gov.uk/public/font-awesome/css/all.css	http/1.1
www.gamblingcommission.gov.uk/public/stylesheets/styles.css?v=3	http/1.1
www.gamblingcommission.gov.uk/public/stylesheets/gcweb5.css	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/active-nav.js	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/grecaptchax.js	http/1.1
www.gamblingcommission.gov.uk/public/search/js/search.min.js	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/gov.js	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/all.js	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/timeline.js	http/1.1
www.gamblingcommission.gov.uk/public/javascripts/inline.js	http/1.1
www.gamblingcommission.gov.uk/public/manifest.webmanifest	http/1.1
www.gamblingcommission.gov.uk/public/images/icons/logo-grey.png	http/1.1
www.gamblingcommission.gov.uk/public/images/icons/android-icon-192x192.png	http/1.1
www.gamblingcommission.gov.uk/public/images/icons/favicon-32x32.png	http/1.1

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.

URL	Transfer Size	Duration
www.gamblingcommission.gov.uk/public/font-awesome/css/all.css	16.8 KiB	268 ms
www.gamblingcommission.gov.uk/public/stylesheets/application.css	38.1 KiB	332 ms
www.gamblingcommission.gov.uk/public/stylesheets/styles.css?v=3	11.9 KiB	204 ms
www.gamblingcommission.gov.uk/public/stylesheets/gcweb5.css	1.2 KiB	204 ms
www.gamblingcommission.gov.uk/public/stylesheets/cdnapplication.css	37.9 KiB	204 ms
fonts.googleapis.com/css?family=Oxygen:400,700&display=swap	901 B	268 ms
/css2?family=Nunito:wght@400;500;600;700&family=Spartan:w...	950 B	61 ms
code.jquery.com/jquery-3.6.0.min.js	30.5 KiB	282 ms

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

Diagnostics

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: 60 ms 21.8 KiB

URL	Transfer Size	Est Savings
www.gamblingcommission.gov.uk/public/stylesheets/application.css	38.1 KiB	8.4 KiB
www.gamblingcommission.gov.uk/public/stylesheets/cdnapplication.css	37.9 KiB	7.4 KiB
www.gamblingcommission.gov.uk/public/font-awesome/css/all.css	16.8 KiB	3.5 KiB
www.gamblingcommission.gov.uk/public/stylesheets/styles.css?v=3	11.9 KiB	2.5 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: 170 ms 96.0 KiB

URL	Transfer Size	Est Savings
www.gamblingcommission.gov.uk/public/stylesheets/cdnapplication.css	37.5 KiB	35.8 KiB
www.gamblingcommission.gov.uk/public/stylesheets/application.css	37.7 KiB	32.7 KiB
www.gamblingcommission.gov.uk/public/font-awesome/css/all.css	16.4 KiB	16.4 KiB
www.gamblingcommission.gov.uk/public/stylesheets/styles.css?v=3	11.6 KiB	11.1 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 11.6 KiB

URL	Transfer Size	Est Savings
www.gamblingcommission.gov.uk/public/javascripts/gov.js	26.6 KiB	11.6 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 22.1 KiB

URL	Transfer Size	Est Savings
code.jquery.com/jquery-3.6.0.min.js	30.2 KiB	22.1 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
Picture of a gambling slot machine.Picture of a gambling slot machine. The slot… `li.card > a > div.img > img`	/j16ev64qyf6l/5GTaAzXJgGYUjkTg12XJ3P/674c17ad0c2b49169a90...
A picture of a crowd of people at a fate. Above the crowd of people is a contin… `li.card > a > div.img > img`	/j16ev64qyf6l/2T4vdexwuKX09KL8M6iTGU/4c0ae70acea170e2898f...
A picture of someone's lower arms with them sitting down at a table with a lapt… `li.card > a > div.img > img`	/j16ev64qyf6l/2jMEUcwohaEYZeydMsXPx1/41af0a6e548140926d1f...
Photo of Commission Head of Data Innovation Hub Tim Livesley alongside the blog… `li.card > div.meta > div.img > img`	/j16ev64qyf6l/6EhW9Fs3LXtv2yGwzs8RD6/2f032dec7c0ac3ef49b5...
A picture of Helen Rhodes is displayed on the right hand side of the image, whi… `li.card > div.meta > div.img > img`	/j16ev64qyf6l/28vB0ILLOz6yxww1C6OVYH/9d8a484672e9aa318ca4...
GamCare Logo `div.govuk-grid-row > div.govuk-grid-column-one-third > div.gcweb-panel > img.gcweb-img`	/j16ev64qyf6l/6BhmAA8nsnOT78ippC8WCy/fd9fb7b22b3bf1a32626...
Gambling Commission logo. The logo contains the word 'Gambling' on top of word … `div.gcweb-width-container > div.gcweb-header__logo > a.gcweb-header__link > img`	/j16ev64qyf6l/2ntAXPE2PlYnt3FGJpuVtf/ba119b1b32ddb454e30e...

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: 270 ms

URL	Time Spent
gamblingcommission.gov.uk/	270 ms
www.gamblingcommission.gov.uk/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
We license, regulate, advise and provide guidance to the individuals and busine… `div.govuk-width-container > div.govuk-grid-row > div.govuk-grid-column-full > p`	0.188
Helping you get information about gambling in Great Britain and find support wh… `body.govuk-template__body > main#main-content`	0.181
Visit the hub about gambling licence information, guidance and advice for busin… `div.govuk-grid-row > div.govuk-grid-column-one-third > div.gcweb-panel > p.gcweb-body`	0.001
Licensees and businesses `div.govuk-width-container > div.flex-nav > ul.flex-left > li`	0.000

●Use efficient cache lifetimes

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Optimize viewport for mobile

●Time to Interactive 1.3 s

●Max Potential First Input Delay 20 ms

●Avoids enormous network payloads Total size was 804 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.1 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 20 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 50 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

100

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.

○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

●`[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

●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.

●ARIA attributes are used as specified for the element's role

●`[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

●`<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

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●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.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○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

○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.

○Uses ARIA roles only on compatible elements

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

○Identical links have the same purpose.

○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

100

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.

○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

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`