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 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
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	66033.0 s	865.1 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	115776.0 s	793.1 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	94843.0 s	415.6 KiB
/siteassets/home/brand2024/spring-2026/wills-pcb-1800x144...	104373.0 s	404.7 KiB
cdn.checkout.ventrata.com/v3/production/assets/index-CVF5e-YI.js	3600.0 s	166.5 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-936x6...	166987.0 s	324.1 KiB
/siteassets/home/brand2024/images/school-dover-1020x612.j...	14400.0 s	123.2 KiB
cdn.checkout.ventrata.com/v3/production/assets/prevention-ByXp18r8.js	3600.0 s	100.8 KiB
/siteassets/home/0-about-us-new/05-contact-us-and-faqs/co...	94850.0 s	183.9 KiB
/siteassets/home/brand2024/spring-2026/header-spring-2-19...	155205.0 s	194.7 KiB
/siteassets/home/brand2024/spring-2026/may-ht-homepage-93...	183737.0 s	197.7 KiB
/siteassets/home/brand2024/spring-2026/spring-home-garden...	165362.0 s	156.6 KiB
cdn.cookie-script.com/s/f4e7e1ee81fa8fb33e400f57fa93afb5.js	0.0 ms	31.3 KiB
/siteassets/home/0-about-us-new/04-news/search-news/2026/...	183038.0 s	102.3 KiB
cdn.checkout.ventrata.com/v3/production/ventrata-checkout.min.js	300.0 s	30.6 KiB
scripts.clarity.ms/0.8.60-beta/clarity.js	0.0 ms	25.0 KiB
/siteassets/home/0-about-us-new/04-news/search-news/2026/...	200505.0 s	82.9 KiB
js.monitor.azure.com/scripts/a/ai.0.js	1800.0 s	21.6 KiB
/siteassets/home/0-about-us-new/04-news/search-news/2026/...	94850.0 s	45.3 KiB

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.

URL	Est Savings
/static/scss/web-fonts/heritage-moderne/HeritageModerneWe...	40 ms
/static/scss/web-fonts/heritage-moderne/HeritageModerneWe...	40 ms
/static/scss/web-fonts/heritage-moderne/HeritageModerneWe...	30 ms

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:4.28 source:map[column:5958 line:14 type:source-location url:https://cdn.checkout.ventrata.com/v3/production/ventrata-checkout.min.js 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:6.051 source:map[type:text value:[unattributed]]] map[reflowTime:8.035 source:map[column:55637 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:1.941 source:map[column:57583 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:7.416 source:map[column:58114 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:1.842 source:map[column:52798 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:0.129 source:map[column:52823 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:2.749 source:map[column:7872 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.161 source:map[column:56002 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.158 source:map[column:56060 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.101 source:map[column:56124 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:1.081 source:map[column:80498 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.497 source:map[column:84970 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.365 source:map[column:57037 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.507 source:map[column:7850 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.152 source:map[column:207127 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7hsHoByHd_cHW7p0hRw1 urlProvider:network]] map[reflowTime:1.025 source:map[column:9497 line:0 type:source-location url: urlProvider:network]] map[reflowTime:3.529 source:map[column:86576 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT73fYBdBaxBwrJcK541 urlProvider:network]] map[reflowTime:0.378 source:map[column:22618 line:0 type:source-location url:https://www.english-heritage.org.uk/bundles/fancybox?v=IJwh_maP-pbSvcYQbGtNSFH46CKN41jpE5XCyRWVxJY1 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.

	URL	Resource Size	Est Savings
div.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`	/siteassets/home/brand2024/spring-2026/may-homepage-heade...	792.6 KiB	585.5 KiB
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`	/siteassets/home/brand2024/spring-2026/may-homepage-936x6...	323.7 KiB	311.6 KiB
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`	/siteassets/home/brand2024/spring-2026/may-ht-homepage-93...	197.3 KiB	185.3 KiB
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`	/siteassets/home/brand2024/spring-2026/spring-home-garden...	156.3 KiB	144.3 KiB
Image: a teacher and a group of school children in front of Dover Castle `div.blog-width-override > div.columns > div.sptn-img > img`	/siteassets/home/brand2024/images/school-dover-1020x612.j...	122.9 KiB	92.0 KiB
a.news-link > div#news-card3 > div.card-image-container > img.card-image `a.news-link > div#news-card3 > div.card-image-container > img.card-image`	/siteassets/home/0-about-us-new/04-news/search-news/2026/...	101.9 KiB	90.7 KiB
a.news-link > div#news-card2 > div.card-image-container > img.card-image `a.news-link > div#news-card2 > div.card-image-container > img.card-image`	/siteassets/home/0-about-us-new/04-news/search-news/2026/...	82.6 KiB	71.3 KiB
div.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`	/siteassets/home/brand2024/spring-2026/header-spring-2-19...	194.4 KiB	61.5 KiB
a.news-link > div#news-card1 > div.card-image-container > img.card-image `a.news-link > div#news-card1 > div.card-image-container > img.card-image`	/siteassets/home/0-about-us-new/04-news/search-news/2026/...	45.0 KiB	33.8 KiB

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-7-IMG

nodeLabel: div.block-container > div.slideshow-container > div.slide > img

path: 1,HTML,1,BODY,8,MAIN,0,DIV,1,DIV,8,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.block-container > div.slideshow-container > div.slide > img

snippet: <img src="/siteassets/home/brand2024/spring-2026/header-spring-2-1920x1080.jpg">

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

value: No additional origins are good candidates for preconnecting

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
/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT...	132.5 KiB	451 ms
/static/scss/appcss?v=XMttbVtDm4ZzSEUOS1L1C9CIRFBpDkKInvk...	236.0 KiB	513 ms

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.

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: 208 ms

URL	Time Spent
english-heritage.org.uk/	208 ms
www.english-heritage.org.uk/	0.0 ms

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 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: 230 ms 230.5 KiB

URL	Transfer Size	Est Savings
/static/scss/appcss?v=XMttbVtDm4ZzSEUOS1L1C9CIRFBpDkKInvk...	235.7 KiB	220.0 KiB
/bundles/css?v=f62kOfxXRnho_a0lhTluRSm6fk7aBxlzKYLoMrDSuxM1	10.6 KiB	10.4 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: 60 ms 771.8 KiB

URL	Transfer Size	Est Savings
cdn.checkout.ventrata.com/v3/production/assets/index-CVF5e-YI.js	166.3 KiB	121.8 KiB
/bundles/js_pre_main_content?v=dZJA92ABTyjvwTaH4Viak-dmTT...	132.2 KiB	96.2 KiB
/_/translate_http/_/js/k=translate_http.tr.es.eNjH1Jo6ldQ...	118.2 KiB	92.5 KiB
/bundles/js_post_main_content?v=GYAGGeBAmVtYAWHOf2_28zxj7...	107.2 KiB	78.0 KiB
www.googletagmanager.com/gtag/destination?id=AW-859685842&cx=c&gtm=4e64k0	133.9 KiB	67.5 KiB
www.googletagmanager.com/gtag/destination?id=AW-955260448&cx=c&gtm=4e64k0	133.9 KiB	67.5 KiB
www.googletagmanager.com/gtag/js?id=G-QK86RM1N34&cx=c&gtm=4e64k0	179.5 KiB	66.6 KiB
www.googletagmanager.com/gtag/js?id=AW-10880701255&cx=c&gtm=4e64k0	143.5 KiB	64.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-KF5D86	194.0 KiB	64.0 KiB
cdn.checkout.ventrata.com/v3/production/assets/prevention-ByXp18r8.js	100.5 KiB	53.7 KiB

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 21.1 KiB

URL	Transfer Size	Est Savings
/static/scss/appcss?v=XMttbVtDm4ZzSEUOS1L1C9CIRFBpDkKInvk...	236.0 KiB	21.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	865.1 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	793.1 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-heade...	415.6 KiB
/siteassets/home/brand2024/spring-2026/wills-pcb-1800x144...	404.7 KiB
/siteassets/home/brand2024/spring-2026/may-homepage-936x6...	324.1 KiB
/static/scss/appcss?v=XMttbVtDm4ZzSEUOS1L1C9CIRFBpDkKInvk...	236.0 KiB
/siteassets/home/brand2024/spring-2026/may-ht-homepage-93...	197.7 KiB
/siteassets/home/brand2024/spring-2026/header-spring-2-19...	194.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-KF5D86	194.3 KiB
/siteassets/home/0-about-us-new/05-contact-us-and-faqs/co...	183.9 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
Image: a teacher and a group of school children in front of Dover Castle `div.blog-width-override > div.columns > div.sptn-img > img`	/siteassets/home/brand2024/images/school-dover-1020x612.j...

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

●Max Potential First Input Delay 80 ms

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify JavaScript

●User Timing marks and measures 9 user timings

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.6 s

●Avoid long main-thread tasks 4 long tasks found

●Avoid non-composited animations 1 animated element found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 100 ms

●Server Backend Latencies 310 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 130 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

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.

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
Ditch the green juice and shakes, have a ‘healthy’ cup of chocolate as Easter a… `a.news-link > div#news-card1 > div.card-content-container > h3.card-title`

These are opportunities to improve keyboard navigation in your application.

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.js `html.js`

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.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`
div.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`
div.slideshow-container > div.button-container > a.pause > img `div.slideshow-container > div.button-container > a.pause > img`
div.slideshow-content > p.primary > a > img `div.slideshow-content > p.primary > a > img`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
a.news-link > div#news-card1 > div.card-image-container > img.card-image `a.news-link > div#news-card1 > div.card-image-container > img.card-image`
a.news-link > div#news-card2 > div.card-image-container > img.card-image `a.news-link > div#news-card2 > div.card-image-container > img.card-image`
a.news-link > div#news-card3 > div.card-image-container > img.card-image `a.news-link > div#news-card3 > div.card-image-container > img.card-image`

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.anim-wrapper > ul.social-nav > li.lng > a `div.anim-wrapper > ul.social-nav > li.lng > 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

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`

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

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Form elements have associated labels

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

●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

●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

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

●Touch targets have sufficient size and spacing.

●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●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.

○`[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

○ARIA IDs are unique

○No form fields have multiple labels

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

○`<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

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○`<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.

○Elements with visible text labels have matching accessible names.

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

●Use a strong HSTS policy

●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

○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.

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
main > div.off-canvas-wrap > div.inner-wrap > a.exit-off-canvas `main > div.off-canvas-wrap > div.inner-wrap > a.exit-off-canvas`
div.block-container > div.slideshow-container > div.button-container > a.pause `div.block-container > div.slideshow-container > div.button-container > a.pause`
div.block-container > div.slideshow-container > div.button-container > a.play `div.block-container > div.slideshow-container > div.button-container > a.play`

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.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`
div.block-container > div.slideshow-container > div.slide > img `div.block-container > div.slideshow-container > div.slide > img`
div.slideshow-container > div.button-container > a.pause > img `div.slideshow-container > div.button-container > a.pause > img`
div.slideshow-content > p.primary > a > img `div.slideshow-content > p.primary > a > img`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image `div.three-story-cards > div.story-card-block > div.card-image-container > img.card-image`
a.news-link > div#news-card1 > div.card-image-container > img.card-image `a.news-link > div#news-card1 > div.card-image-container > img.card-image`
a.news-link > div#news-card2 > div.card-image-container > img.card-image `a.news-link > div#news-card2 > div.card-image-container > img.card-image`
a.news-link > div#news-card3 > div.card-image-container > img.card-image `a.news-link > div#news-card3 > div.card-image-container > img.card-image`

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

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`