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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

27

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.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
the all in one repository a home for papers, FAIR data and non-traditional rese… div.mGtOh > main.yr0BG > div > div.wQjZY
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...1011.5 KiB920.1 KiB
cloud solutions for publishers figshare enables you to host large amounts of da… div.mGtOh > main.yr0BG > div > div.Ba7eZ
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...453.8 KiB362.4 KiB
Comparative model of novel coronavirus 2019 main.yr0BG > div > div.gksp8 > img.o20Lq
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...319.4 KiB179.7 KiB
The University of Melbourne logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...15.2 KiB13.8 KiB
SMU Research Data Repository logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...11.7 KiB9.9 KiB
The University of Auckland logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...10.9 KiB9.6 KiB
Iowa State University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...9.1 KiB8.0 KiB
The University of Arizona logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...8.7 KiB7.5 KiB
Stockholm University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...7.1 KiB6.4 KiB
The University of Oxford logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...7.4 KiB6.0 KiB
Janelia Research Campus logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...7.0 KiB5.9 KiB
The United States Environmental Protection Agency’s Center for Computational To… div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...6.9 KiB5.8 KiB
The Francis Crick Institute logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...5.8 KiB5.2 KiB
Carnegie Mellon University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...6.2 KiB5.1 KiB
University of Cape Town logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...5.3 KiB4.4 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-2-IMG
nodeLabel: Comparative model of novel coronavirus 2019
path: 1,HTML,1,BODY,0,DIV,0,DIV,1,DIV,4,MAIN,0,DIV,0,DIV,0,IMG
selector: main.yr0BG > div > div.gksp8 > img.o20Lq
snippet: <img alt="Comparative model of novel coronavirus 2019" class="o20Lq" src="https://websitev3-p-eu.figstatic.com/assets-v3/b5eb4279ab77fc1c08853c74248…">

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.

URLTransfer SizeDuration
fonts.googleapis.com/css?family=B612|B612+Mono|Roboto&display=swap2.1 KiB816 ms

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
/SIE/?Q_ZID=ZN_7QXt10CASDcBqvA3600.0 s4.6 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...604800.0 s35.8 KiB
/dxjsmodule/CoreModule.js?Q_CLIENTVERSION=2.46.0&Q_CLIENT...604800.0 s30.9 KiB
/dxjsmodule/FeedbackButtonModule.js?Q_CLIENTVERSION=2.46....604800.0 s19.4 KiB
/dxjsmodule/37.7ea1ffe71ad8c0799cc1.chunk.js?Q_CLIENTVERS...604800.0 s18.6 KiB
/dxjsmodule/1.bc67e778235741631577.chunk.js?Q_CLIENTVERSI...604800.0 s7.1 KiB
/dxjsmodule/7.f7df015b06d8a90ce822.chunk.js?Q_CLIENTVERSI...604800.0 s1.4 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
s3-eu-west-1.amazonaws.com/ppreviews-rmit-0039450820/63943287/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943293/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943290/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943284/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943281/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943278/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943275/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943266/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943257/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943254/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943251/thumb.pnghttp/1.1
s3-eu-west-1.amazonaws.com/pfigshare-u-previews/63943245/thumb.pnghttp/1.1

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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: 1.5 s
URLTime Spent
figshare.com/1.5 s
figshare.com/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: 1.5 s
URLTime Spent
figshare.com/1.6 s

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.1 s 2.5 MiB
URLTransfer SizeEst Savings
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...1.6 MiB1.6 MiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/clien...1.0 MiB585.3 KiB
/64b6c62dfbe5/d5e199e0e037/e913bb7e8153/challenge.js575.2 KiB314.3 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...35.7 KiB21.2 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
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/clien...3.5 s2.7 s644 ms
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...1.9 s717 ms1.0 s
Unattributable1.2 s196 ms0.0 ms
/64b6c62dfbe5/d5e199e0e037/e913bb7e8153/challenge.js1.0 s734 ms173 ms
figshare.com/696 ms43 ms5.4 ms
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...262 ms211 ms18 ms
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...105 ms101 ms3.0 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 Evaluation4.7 s
Script Parsing & Compilation1.9 s
Other1.3 s
Style & Layout379 ms
Parse HTML & CSS194 ms
Garbage Collection147 ms
Rendering129 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with WebSocket cannot enter back/forward cache.Pending browser support

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
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...1.7 MiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/clien...1.0 MiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...1013.0 KiB
/64b6c62dfbe5/d5e199e0e037/e913bb7e8153/challenge.js575.7 KiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...454.7 KiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...320.1 KiB
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...305.6 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...35.8 KiB
/dxjsmodule/CoreModule.js?Q_CLIENTVERSION=2.46.0&Q_CLIENT...30.9 KiB
figshare.com/28.0 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
SMU Research Data Repository logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
University of Amsterdam logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The University of Melbourne logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
figshare div.DRZ55 > div.+WuQ4 > a._3+kae > img.gPhOQ
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Tech Rxiv logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The University of Auckland logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The University of Oxford logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Janelia Research Campus logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The United States Environmental Protection Agency’s Center for Computational To… div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Frontiers logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The University of Arizona logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Iowa State University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Taylor & Francis Group logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Carnegie Mellon University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The Royal Society Publishing logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Genetics Society of America logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
F1000 Research logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
OSA Publishing logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Microbiology Society logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
University of Cape Town logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
University College London logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Sage Journals logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Advance logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Stockholm University logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Institute of Physics logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
The Francis Crick Institute logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Plos logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Scielo logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Wellcome logo div.MtwY2 > div.bAnqY > a._3+kae > img.zL8cD
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Springer Nature logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Brill Publishers logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...
Stockholm University logo div.bFsWy > div.giSWp > a._3+kae > img.xKxwd
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...

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

●Layout shift culprits
●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoid long main-thread tasks 16 long tasks found
●Network Requests
●Network Round Trip Times 330 ms
●Server Backend Latencies 280 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
○Avoid large layout shifts
78

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.

ARIA

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
DATASET Performance Measurements for the AMG Benchmark on the Aurora Supercompu… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
THESIS The collection and compilation of household survey data for applications… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
How curriculum frameworks cultivate democratic and historical consciousness Jo… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
The True Benefits of Designing Design Methods Journal contribution posted on 2… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
he Logistic Map under an Algebraic and Journal contribution posted on 2026-04-… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Chaos in Classical Discrete Maps: an Analytical Journal contribution posted on… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Linear Operators Associated with Dynamical Journal contribution posted on 2026… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Hybrid Tubular System (Water–Air) for Sustainable Coastal and Interurban Transp… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Semigroups and Abstract Formulation of Differential Journal contribution poste… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Continuous Dependence of Solutions on Delay Journal contribution posted on 202… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Robust Stability Criteria for Systems with Journal contribution posted on 2026… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Hopf Normal Form of Bifurcation in Equations with Journal contribution posted … div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Reduction to the Central Manifold in Systems with Journal contribution posted … div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Local Bifurcation Theory in Functional Differential Journal contribution poste… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
DATASET Supplemental Material: Islas Marías Archipelago: A missing fragment bet… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+
Periodic Solutions in Functional Differential Journal contribution posted on 2… div._7nwZd > div.bAFXx > ul.GyUKC > div.VhwO+

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
DATASET Performance Measurements for the AMG Benchmark on the Aurora Supercompu… div.twVPN > div._7nwZd > div.bAFXx > ul.GyUKC

ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
Cookie consent This website uses cookies for analytics and improving your on-li… div#app > fecore-ui-overlays#fecore-ui-overlays > aside.yz2Kv > section._6Ad4s

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

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
Heather Sharp div.zzfyc > div.PyHS0 > div.oHUKK > button._3+kae
Peter Schaaf div.zzfyc > div.PyHS0 > div.oHUKK > button._3+kae

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
share div.kXKPO > h1.c+5+G > div.dqolT > span.ey0mP

These are opportunities to improve the legibility of your content.

○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-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
●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
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<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.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[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
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○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.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○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.
92

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLDisplayed sizeActual sizeExpected size
figshare div.DRZ55 > div.+WuQ4 > a._3+kae > img.gPhOQ
/assets-v3/b5eb4279ab77fc1c08853c74248888beecb93e0d/stati...167 x 52167 x 52251 x 78

General

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy
●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
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●Ensure CSP is effective against XSS attacks
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Mitigate clickjacking with XFO or CSP
92

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
●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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