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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

46

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:0.231573] map[node:map[boundingRect:map[bottom:6297 height:5629 left:0 right:1350 top:668 width:1350] lhId:page-2-MAIN nodeLabel:Find your course Search Explore our study areas Agriculture environment and sus… path:1,HTML,3,BODY,12,MAIN selector:body.home > main snippet:<main class="" data-grid-sidebar=""> type:node] score:0.231489] map[node:map[boundingRect:map[bottom:68 height:48 left:981 right:1312 top:20 width:331] lhId:page-1-NAV nodeLabel:Study Search Menu path:1,HTML,3,BODY,7,HEADER,0,DIV,1,NAV selector:body.home > header.header > div.header__container > nav.header__container--menu snippet:<nav class="header__container--menu" aria-label="header actions"> type:node] score:8.4e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:2701 height:533 left:205 right:505 top:2167 width:300] lhId:page-30-IMG nodeLabel:Nicholas is stepping out of his comfort zone and inspiring others to do the sam… path:1,HTML,3,BODY,12,MAIN,0,ARTICLE,2,MIMAS-BLOCK,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,BUTTON,0,IMG selector:div > div.mc-item > button.video__button > img snippet:<img decoding="async" src="https://s30991.pcdn.co/wp-content/uploads/sites/4/2023/09/Nick-Change.webp" alt="Nicholas is stepping out of his comfort zone and inspiring others to do th…" srcset="https://s30991.pcdn.co/wp-content/uploads/sites/4/2023/09/Nick-Change-150x…" sizes="(min-width: 2560px) 2560px, (min-width: 1920px) 1920px, (min-width: 1440px…" loading="lazy"> 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.

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.

URLEst Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff250 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff245 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff240 ms
/af/efe4a5/00000000000000007735e609/30/l?primer=7cdcb44be...10 ms
/af/2dce9d/00000000000000003b9b489b/27/l?primer=7cdcb44be...10 ms
/af/78aca8/00000000000000007735e60d/30/l?primer=7cdcb44be...5.0 ms
/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be...5.0 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:57.241 source:map[column:27323 line:2 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 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:119.762 source:map[type:text value:[unattributed]]] map[reflowTime:0.158 source:map[column:29114 line:1 type:source-location url:https://s30991.pcdn.co/wp-content/themes/mimas/dist/js/app.js urlProvider:network]] map[reflowTime:46.059 source:map[column:49615 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:0.402 source:map[column:50335 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:0.414 source:map[column:50393 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:0.244 source:map[column:50457 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:4.945 source:map[column:694150 line:1 type:source-location url:https://s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js urlProvider:network]] map[reflowTime:0.286 source:map[column:51395 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:2.194 source:map[column:85575 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:8.807 source:map[column:49637 line:1 type:source-location url:https://s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:1.892 source:map[column:643539 line:1 type:source-location url:https://s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js urlProvider:network]] map[reflowTime:1.924 source:map[column:693855 line:1 type:source-location url:https://s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js urlProvider:network]]]

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-DIV
nodeLabel: Curtin Open Day 2026  Sunday 24 May, 10am to 3pm Explore courses, tour campus…
path: 1,HTML,3,BODY,9,MIMAS-MASTHEAD,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV
selector: div#slick-slide00 > div > div.mh-slide__container > div.mh-slide
snippet: <div class="mh-slide" style="--mh-slide-bg: url(https://s30991.pcdn.co/wp-content/uploads/sites/4/2026/…;" data-image-position="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
s30991.pcdn.co/wp-content/themes/mimas/dist/css/main.css?ver=3.5.565.5 KiB122 ms
s30991.pcdn.co/wp-content/themes/homepage/dist/css/child.css?ver=6.9.41.8 KiB
s30991.pcdn.co/wp-content/themes/mimas/dist/css/2026/header.css?v=3.5.518.5 KiB

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.

RequestCache TTLTransfer Size
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/6538fb62-bdb...0.0 ms1.0 MiB
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/943ac062-c20...0.0 ms321.4 KiB
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/40cdd8e2-2ef...0.0 ms261.0 KiB
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/c9fabfe3-496...0.0 ms115.9 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
i.ytimg.com/vi/8DCiSMOQIx0/maxresdefault.jpg7200.0 s56.2 KiB
/signals/config/415133522630959?v=2.9.303&r=stable&domain...1200.0 s46.5 KiB
www.instagram.com/embed.js1200.0 s33.8 KiB
i.ytimg.com/vi_webp/duUZMki6DDI/maxresdefault.webp7200.0 s36.1 KiB
i.ytimg.com/vi_webp/40ddEmjZ46w/maxresdefault.webp7200.0 s34.3 KiB
scripts.clarity.ms/0.8.60-beta/clarity.js0.0 ms25.0 KiB
/signals/config/547059549414519?v=2.9.303&r=stable&domain...1200.0 s16.7 KiB
js.adsrvr.org/up_loader.1.1.0.js0.0 ms12.3 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
munchkin.marketo.net/munchkin.js0.0 ms1.2 KiB
js.adsrvr.org/universal_pixel.js0.0 ms958 B
/collect?v=2&fmt=js&pid=1376404&time=1776901400016&url=ht...0.0 ms693 B
/config/au/777363f7-8833-4ecc-a6cb-e757c2dcc623.js?v=3.56...0.0 ms477 B
static.doubleclick.net/instream/ad_status.js900.0 s495 B
/p.css?s=1&k=qji7bck&ht=tk&f=137.138.139.140.169.170.173....604800.0 s172 B
/tr/?id=415133522630959&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
/tr/?id=547059549414519&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
static.doubleclick.net/instream/ad_status.js900.0 s0 B
static.doubleclick.net/instream/ad_status.js900.0 s0 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Panorama view of Miri city, Sarawak, Borneo, Malaysia div > div.mc-item > a.mc-link > img
/wp-content/uploads/sites/4/2022/12/AdobeStock_220638856-...341.8 KiB280.2 KiB
Wide shot of Curtin's main Perth campus div > div.mc-item > a.mc-link > img
/wp-content/uploads/sites/4/2023/06/curtin-perth-2000x100...284.9 KiB200.4 KiB
Protecting our planet mimas-block > div.checkered-items__container > div.checkered-item > img.animate
/wp-content/uploads/sites/4/2022/12/Working-together.jpg....115.7 KiB82.9 KiB
Fostering inclusion and positivity mimas-block > div.checkered-items__container > div.checkered-item > img.animate
/wp-content/uploads/sites/4/2022/12/Protecting-our-planet...104.0 KiB68.1 KiB
Lara is advocating for female involvement in STEM. div > div.mc-item > button.video__button > img
s30991.pcdn.co/wp-content/uploads/sites/4/2023/09/Lara-Change.webp84.6 KiB63.9 KiB
Working together mimas-block > div.checkered-items__container > div.checkered-item > img.animate
/wp-content/uploads/sites/4/2022/12/Screen-Shot-2022-04-0...94.3 KiB53.8 KiB
Mauritius div > div.mc-item > a.mc-link > img
s30991.pcdn.co/wp-content/uploads/sites/4/2022/12/Mauritius.jpeg.optimal.jpeg56.1 KiB30.1 KiB
Singapore div > div.mc-item > a.mc-link > img
s30991.pcdn.co/wp-content/uploads/sites/4/2022/12/Singapore.jpg.optimal.jpg41.0 KiB21.7 KiB
Dubai div > div.mc-item > a.mc-link > img
s30991.pcdn.co/wp-content/uploads/sites/4/2022/12/Dubai.jpg.optimal.jpg40.7 KiB21.4 KiB
Skyline of Colombo, Sri Lanka div > div.mc-item > a.mc-link > img
/wp-content/uploads/sites/4/2024/11/colombo_skyline.jpg.o...43.8 KiB17.8 KiB

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: 1.1 s
URLTime Spent
curtin.edu.au/1.1 s
www.curtin.edu.au/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 507 ms
URLTime Spent
www.curtin.edu.au/607 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.

ElementLayout shift score
Find your course Search Explore our study areas Agriculture environment and sus… body.home > main
0.231
Study Search Menu body.home > header.header > div.header__container > nav.header__container--menu
0.000

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: 0.0 ms 85.0 KiB
URLTransfer SizeEst Savings
s30991.pcdn.co/wp-content/themes/mimas/dist/css/main.css?ver=3.5.564.9 KiB49.9 KiB
/wp-content/plugins/instagram-feed-pro/css/sbi-styles.min...19.9 KiB19.9 KiB
s30991.pcdn.co/wp-content/themes/mimas/dist/css/2026/header.css?v=3.5.518.0 KiB15.2 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: 170 ms 1.3 MiB
URLTransfer SizeEst Savings
s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js230.7 KiB208.3 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js120.9 KiB92.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-WKWRXD&l=dataCoreLayer183.2 KiB78.7 KiB
/gtag/destination?id=AW-696927740&l=dataCoreLayer&cx=c&gt...133.9 KiB67.1 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js120.9 KiB66.0 KiB
www.googletagmanager.com/gtag/js?id=G-EKWQ9HJQLL&l=dataCoreLayer&cx=c&gtm=4e64k1176.2 KiB64.9 KiB
www.googletagmanager.com/gtag/js?id=AW-798357996&l=dataCoreLayer&cx=c&gtm=4e64k1144.4 KiB62.4 KiB
www.googletagmanager.com/gtag/js?id=AW-845765649&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-845765595&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-809627420&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-603415810&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-845765673&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB61.4 KiB
www.googletagmanager.com/gtag/js?id=AW-969241043&l=dataCoreLayer&cx=c&gtm=4e64k1137.3 KiB60.7 KiB
www.googletagmanager.com/gtag/js?id=G-SWCC7XWPW9&l=dataCoreLayer&cx=c&gtm=4e64k1156.8 KiB60.0 KiB
s30991.pcdn.co/wp-content/themes/mimas/dist/js/2026/header.js?v=3.5.588.9 KiB58.6 KiB
www.googletagmanager.com/gtag/js?id=DC-14510064&l=dataCoreLayer&cx=c&gtm=4e64k1130.6 KiB57.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-PZM3KG&l=dataCoreLayer198.0 KiB52.6 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB32.1 KiB
www.instagram.com/embed.js33.7 KiB26.9 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
s30991.pcdn.co/wp-includes/js/jquery/jquery.min.js?ver=3.7.1585 ms465 ms2.4 ms
Unattributable399 ms4.8 ms0.0 ms
www.curtin.edu.au/371 ms11 ms2.4 ms
www.googletagmanager.com/gtm.js?id=GTM-PZM3KG&l=dataCoreLayer162 ms132 ms22 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js149 ms114 ms32 ms
s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js142 ms26 ms13 ms
www.googletagmanager.com/gtm.js?id=GTM-WKWRXD&l=dataCoreLayer138 ms122 ms14 ms
www.googletagmanager.com/gtag/js?id=G-EKWQ9HJQLL&l=dataCoreLayer&cx=c&gtm=4e64k194 ms82 ms10 ms
scripts.clarity.ms/0.8.60-beta/clarity.js81 ms63 ms1.9 ms
/signals/config/415133522630959?v=2.9.303&r=stable&domain...78 ms46 ms3.5 ms
www.googletagmanager.com/gtag/js?id=G-SWCC7XWPW9&l=dataCoreLayer&cx=c&gtm=4e64k168 ms60 ms7.9 ms
sc-static.net/scevent.min.js65 ms50 ms1.1 ms
www.googletagmanager.com/gtag/js?id=AW-798357996&l=dataCoreLayer&cx=c&gtm=4e64k162 ms54 ms8.1 ms
snap.licdn.com/li.lms-analytics/insight.min.js56 ms50 ms3.6 ms
s30991.pcdn.co/wp-content/themes/mimas/dist/js/2026/header.js?v=3.5.554 ms27 ms4.7 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.7 s
Other636 ms
Style & Layout287 ms
Script Parsing & Compilation209 ms
Garbage Collection85 ms
Rendering50 ms
Parse HTML & CSS40 ms

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.

URLTransfer Size
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/6538fb62-bdb...1.0 MiB
s30991.pcdn.co/events/wp-content/uploads/2026/04/Event-Banner-740x370.png417.9 KiB
/wp-content/uploads/sites/4/2022/12/AdobeStock_220638856-...342.8 KiB
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/943ac062-c20...321.4 KiB
/wp-content/uploads/sites/4/2023/06/curtin-perth-2000x100...285.7 KiB
/images/1761ad94-f7b4-466f-ae5f-6e617c13c9fc/40cdd8e2-2ef...261.0 KiB
s30991.pcdn.co/wp-content/themes/mimas/dist/js/vendor.js231.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-PZM3KG&l=dataCoreLayer198.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-WKWRXD&l=dataCoreLayer183.5 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021...183.1 KiB

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

●Max Potential First Input Delay 100 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 13 user timings
●Avoid long main-thread tasks 9 long tasks found
●Avoid non-composited animations 8 animated elements found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 300 ms
●Server Backend Latencies 280 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
○INP breakdown
93

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

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
mimas-block > form.search-form > fieldset.search-bar > button.search-clear mimas-block > form.search-form > fieldset.search-bar > button.search-clear

Including a skip link can help users skip to the main content to save time. Learn more about skip links.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to the content body.home > nav.skip-links > a.skip-to-content
Skip to search body.home > nav.skip-links > a
Skip to secondary navigation body.home > nav.skip-links > 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.

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
Explore our study areas article.mimas-grid > mimas-block > section.study-areas > h4

These are opportunities to improve keyboard navigation in your application.

○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]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●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
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
●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 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
○`<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
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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
○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.
81

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
AttributionReporting
snap.licdn.com/li.lms-analytics/insight.min.js
●Uses HTTPS
●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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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`

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