C — https://www.cam.ac.uk | BeaverCheck Audit

Site Health

Score: 76 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

Content-Security-Policy header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

13 image-only link(s) without alt text

Accessibility › Link & Button Quality

No <main> landmark found

Accessibility › Landmark Structure

Cross-Origin-Embedder-Policy header is missing

Security › Security Headers

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.cam.ac.uk)](https://beavercheck.com/results/2b56e00a-8faa-4712-8b0e-bba284e84f32)

HTML

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

100

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.78 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.80 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

492 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.001

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.30 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

10.63 s

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.

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

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

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

	URL	Resource Size	Est Savings
Chris Rokos, committing to gift to create new school. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_hero/public/news-rok...	94.8 KiB	85.0 KiB
div#file-240103 > div.content > div.media-youtube-video > iframe.media-youtube-player `div#file-240103 > div.content > div.media-youtube-video > iframe.media-youtube-player`	www.cam.ac.uk/sites/default/files/media-youtube/-Qc4k3g4shU.jpg	182.1 KiB	32.1 KiB
Women's Blue Boat crew in front of St John's College, Cambridge. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_social/public/instag...	43.0 KiB	29.7 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...	32.7 KiB	15.2 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/boat_rac...	30.8 KiB	13.3 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/news-pep...	30.5 KiB	13.0 KiB
Researcher demonstrating. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...	35.2 KiB	10.8 KiB
Entrepreneur examines robot innovation. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...	30.0 KiB	5.6 KiB

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

lhId: page-0-IMG

nodeLabel: Chris Rokos, committing to gift to create new school.

path: 1,HTML,1,BODY,3,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.field > div.field-items > div.field-item > img.img-fluid

snippet: <img class="img-fluid" src="https://www.cam.ac.uk/sites/default/files/styles/homepage_hero/public/news…" alt="Chris Rokos, committing to gift to create new school.">

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.

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.

URL	Transfer Size	Duration
/sites/default/files/css/css_RjmzftpAGXabqwZ7HyvKnOztNwF0...	33.6 KiB	452 ms
fonts.googleapis.com/css?family=Lato:300,400,700&display=swap	918 B	786 ms
www.cam.ac.uk/misc/jquery-extend-3.4.0.js?v=1.12.4	1.7 KiB
www.cam.ac.uk/sites/all/themes/fresh/js/libs/jquery-3.5.1.min.js?v=3.5.1	35.6 KiB	452 ms
www.cam.ac.uk/sites/all/themes/fresh/js/libs/bootstrap.bundle.min.js?tankhw	26.4 KiB	603 ms
www.cam.ac.uk/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.12.4	5.2 KiB
/profiles/cambridge/modules/contrib/entityreference/js/en...	649 B
www.cam.ac.uk/misc/drupal.js?tankhw	8.2 KiB	151 ms
www.cam.ac.uk/sites/all/themes/fresh/js/custom.js?tankhw	435 B
/profiles/cambridge/modules/contrib/jquery_update/js/jque...	529 B
/sites/default/files/css/css_E6I_hwGVomYfNigmb21NoO7WlcFG...	1.3 KiB
/sites/default/files/css/css_xE-rWrJf-fncB6ztZfd2huxqgxu4...	2.7 KiB
/sites/default/files/css/css_Y8NEY2YWUfa3u_TPeruukvJY8vHc...	5.0 KiB
www.cam.ac.uk/misc/jquery.once.js?v=1.2	1.4 KiB	151 ms
/sites/default/files/css/css_oJy39CNYEX-OeaMm0Zg3OuPnntUB...	3.3 KiB

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js	604800.0 s	123.3 KiB

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

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.

TTI

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.

Diagnostics

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

Estimated savings: 0.0 ms 8.8 KiB

URL	Transfer Size	Est Savings
www.cam.ac.uk/misc/drupal.js?tankhw	7.9 KiB	5.3 KiB
www.cam.ac.uk/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.12.4	4.9 KiB	3.5 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.

Estimated savings: 150 ms 31.1 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_RjmzftpAGXabqwZ7HyvKnOztNwF0...	33.3 KiB	31.1 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.

Estimated savings: 150 ms 275.9 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-P8Q1QT5W4K&cx=c&gtm=4e6411	175.2 KiB	69.2 KiB
www.googletagmanager.com/gtag/js?id=G-KV2LE1CRC2&cx=c&gtm=4e6411	155.4 KiB	64.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-NV99KVN	131.2 KiB	62.9 KiB
cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js	122.9 KiB	57.4 KiB
www.cam.ac.uk/sites/all/themes/fresh/js/libs/bootstrap.bundle.min.js?tankhw	26.1 KiB	21.7 KiB

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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.cam.ac.uk/	542 ms	39 ms	12 ms
www.googletagmanager.com/gtag/js?id=G-P8Q1QT5W4K&cx=c&gtm=4e6411	442 ms	368 ms	69 ms
Unattributable	413 ms	8.3 ms	0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-NV99KVN	339 ms	262 ms	48 ms
cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js	283 ms	230 ms	51 ms
www.googletagmanager.com/gtag/js?id=G-KV2LE1CRC2&cx=c&gtm=4e6411	229 ms	167 ms	59 ms
www.cam.ac.uk/sites/all/themes/fresh/js/libs/jquery-3.5.1.min.js?v=3.5.1	129 ms	70 ms	11 ms
js-agent.newrelic.com/nr-rum-1.312.1.min.js	113 ms	94 ms	7.3 ms

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

Category	Time Spent
Script Evaluation	1.3 s
Other	470 ms
Style & Layout	364 ms
Script Parsing & Compilation	275 ms
Parse HTML & CSS	98 ms
Rendering	60 ms
Garbage Collection	35 ms

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

	URL
Chris Rokos, committing to gift to create new school. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_hero/public/news-rok...
Women's Blue Boat crew in front of St John's College, Cambridge. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_social/public/instag...
Student reading book in library. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Woman cleaning museum exhibit. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Researcher demonstrating. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Entrepreneur examines robot innovation. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
James Partridge and Aryan Parekh. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/james...
Cambridge boxer. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/news-pep...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/babak_ba...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/boat_rac...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-u...
div.region > div#block-menu-menu-global-footer-with-logo > a.item > img.cam-logo `div.region > div#block-menu-menu-global-footer-with-logo > a.item > img.cam-logo`	/sites/all/themes/fresh/images/interface/university_logo_...
University of Cambridge `div.container > nav.row > a.item > img.cam-logo`	www.cam.ac.uk/sites/all/themes/fresh/images/interface/cambridge_university2.svg

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Avoids enormous network payloads Total size was 1,816 KiB

●User Timing marks and measures 10 user timings

●Avoid long main-thread tasks 11 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 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.

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.

Failing Elements
Samuel Pepys censored his links to slavery `div.row > div.col-lg-4 > div.wrapper > a`
New computer chip material could slash AI energy use `div.row > div.col-lg-4 > div.wrapper > a`
Cambridge Blue Boats revealed for The Boat Race `div.row > div.col-lg-4 > div.wrapper > 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.

○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

●`[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

●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.

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

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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements 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

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

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

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

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

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

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.

Content Best Practices

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

Link destination	Link Text
www.undergraduate.study.cam.ac.uk/?ucam-ref=homepage-signpost	Learn more
www.postgraduate.study.cam.ac.uk/?ucam-ref=homepage-signpost	Learn more

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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

737 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

872 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

24 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

953 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.91 s

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.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

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

lhId: page-0-IMG

nodeLabel: Chris Rokos, committing to gift to create new school.

path: 1,HTML,1,BODY,3,DIV,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.field > div.field-items > div.field-item > img.img-fluid

snippet: <img class="img-fluid" src="https://www.cam.ac.uk/sites/default/files/styles/homepage_hero/public/news…" alt="Chris Rokos, committing to gift to create new school.">

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.

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.

URL	Transfer Size	Duration
fonts.googleapis.com/css?family=Lato:300,400,700&display=swap	918 B	267 ms
www.cam.ac.uk/sites/all/themes/fresh/js/libs/jquery-3.5.1.min.js?v=3.5.1	35.6 KiB
www.cam.ac.uk/sites/all/themes/fresh/js/libs/bootstrap.bundle.min.js?tankhw	26.4 KiB
www.cam.ac.uk/sites/all/themes/fresh/js/custom.js?tankhw	451 B
/profiles/cambridge/modules/contrib/jquery_update/js/jque...	646 B
/sites/default/files/css/css_RjmzftpAGXabqwZ7HyvKnOztNwF0...	33.7 KiB	81 ms
/sites/default/files/css/css_oJy39CNYEX-OeaMm0Zg3OuPnntUB...	3.4 KiB
www.cam.ac.uk/misc/drupal.js?tankhw	8.1 KiB
www.cam.ac.uk/misc/jquery-extend-3.4.0.js?v=1.12.4	1.7 KiB
www.cam.ac.uk/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.12.4	5.2 KiB
/profiles/cambridge/modules/contrib/entityreference/js/en...	724 B
www.cam.ac.uk/misc/jquery.once.js?v=1.2	1.4 KiB
/sites/default/files/css/css_xE-rWrJf-fncB6ztZfd2huxqgxu4...	2.7 KiB
/sites/default/files/css/css_Y8NEY2YWUfa3u_TPeruukvJY8vHc...	4.9 KiB
/sites/default/files/css/css_E6I_hwGVomYfNigmb21NoO7WlcFG...	1.3 KiB

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Request	Cache TTL	Transfer Size
cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js	604800.0 s	123.3 KiB

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

	URL	Resource Size	Est Savings
div#file-240103 > div.content > div.media-youtube-video > iframe.media-youtube-player `div#file-240103 > div.content > div.media-youtube-video > iframe.media-youtube-player`	www.cam.ac.uk/sites/default/files/media-youtube/-Qc4k3g4shU.jpg	182.1 KiB	32.1 KiB
Women's Blue Boat crew in front of St John's College, Cambridge. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_social/public/instag...	43.0 KiB	12.7 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...	32.7 KiB	12.5 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/boat_rac...	30.8 KiB	10.6 KiB
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/news-pep...	30.5 KiB	10.3 KiB
Researcher demonstrating. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...	35.2 KiB	9.8 KiB
Entrepreneur examines robot innovation. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...	30.0 KiB	4.6 KiB

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

Diagnostics

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

Estimated savings: 0.0 ms 8.8 KiB

URL	Transfer Size	Est Savings
www.cam.ac.uk/misc/drupal.js?tankhw	7.9 KiB	5.3 KiB
www.cam.ac.uk/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.12.4	4.9 KiB	3.5 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.

Estimated savings: 0.0 ms 30.4 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_RjmzftpAGXabqwZ7HyvKnOztNwF0...	33.3 KiB	30.4 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.

Estimated savings: 0.0 ms 277.0 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-P8Q1QT5W4K&cx=c&gtm=4e6420h2	176.0 KiB	68.5 KiB
www.googletagmanager.com/gtag/js?id=G-KV2LE1CRC2&cx=c&gtm=4e6420h2	156.0 KiB	66.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-NV99KVN	131.6 KiB	63.1 KiB
cc.cdn.civiccomputing.com/9/cookieControl-9.x.min.js	122.8 KiB	57.4 KiB
www.cam.ac.uk/sites/all/themes/fresh/js/libs/bootstrap.bundle.min.js?tankhw	26.1 KiB	21.7 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

	URL
Chris Rokos, committing to gift to create new school. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_hero/public/news-rok...
Women's Blue Boat crew in front of St John's College, Cambridge. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_social/public/instag...
Student reading book in library. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Woman cleaning museum exhibit. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Researcher demonstrating. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
Entrepreneur examines robot innovation. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
James Partridge and Aryan Parekh. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/james...
Cambridge boxer. `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_linkbox/public/cambr...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/news-pep...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/babak_ba...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/boat_rac...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-s...
div.field > div.field-items > div.field-item > img.img-fluid `div.field > div.field-items > div.field-item > img.img-fluid`	/sites/default/files/styles/homepage_news/public/events-u...
div.region > div#block-menu-menu-global-footer-with-logo > a.item > img.cam-logo `div.region > div#block-menu-menu-global-footer-with-logo > a.item > img.cam-logo`	/sites/all/themes/fresh/images/interface/university_logo_...
University of Cambridge `div.container > nav.row > a.item > img.cam-logo`	www.cam.ac.uk/sites/all/themes/fresh/images/interface/cambridge_university2.svg

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

●Time to Interactive 1.9 s

●Max Potential First Input Delay 80 ms

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Avoids enormous network payloads Total size was 1,819 KiB

●User Timing marks and measures 10 user timings

●JavaScript execution time 0.3 s

●Minimizes main-thread work 0.6 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 30 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 10 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

Accessibility

Names and labels

Failing Elements
Samuel Pepys censored his links to slavery `div.row > div.col-lg-4 > div.wrapper > a`
New computer chip material could slash AI energy use `div.row > div.col-lg-4 > div.wrapper > a`
Cambridge Blue Boats revealed for The Boat Race `div.row > div.col-lg-4 > div.wrapper > 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.

○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

●`[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

●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.

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

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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements 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

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

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

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

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

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

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

Content Best Practices

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

Link destination	Link Text
www.undergraduate.study.cam.ac.uk/?ucam-ref=homepage-signpost	Learn more
www.postgraduate.study.cam.ac.uk/?ucam-ref=homepage-signpost	Learn more

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`

Results for https://www.cam.ac.uk

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Names and labels

Best Practices

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Names and labels

Best Practices

SEO

Content Best Practices

Keyboard Shortcuts