Skip to content
https://worldscientific.com

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

48

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
wspc.scienceconnect.io/assets/Icon-HQQlULcX.js0.0 ms84.9 KiB
www.worldscientific.com/sda/1476/Nobel.corporate.page.jpg0.0 ms59.9 KiB
/signals/config/162493725769742?v=2.9.303&r=stable&domain...1200.0 s46.7 KiB
www.worldscientific.com/templates/jsp/js/jquery-3.1.1.min.js0.0 ms30.8 KiB
static.zotabox.com/d/d/dd13e181780e401e8a2258e54c92eb84/widgets.js3600.0 s34.2 KiB
www.worldscientific.com/sda/1476/sideadv-connect.jpg0.0 ms23.6 KiB
www.redditstatic.com/ads/pixel.js60.0 s19.0 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
/signals/config/731609284183339?v=2.9.303&r=stable&domain...1200.0 s16.4 KiB
/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f...604800.0 s130.5 KiB
/products/wspc/releasedAssets/css/build-66a265cf9ffa18777...604800.0 s113.0 KiB
www.worldscientific.com/sda/1476/WS.new.textbook.png0.0 ms11.2 KiB
scripts.clarity.ms/0.8.59/clarity.js86400.0 s26.2 KiB
/products/wspc/releasedAssets/images/banner-corporate-34a...604800.0 s104.5 KiB
a.quora.com/qevents.js14400.0 s14.7 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...14400.0 s11.8 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...14400.0 s11.4 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
static.hotjar.com/c/hotjar-2837739.js?sv=760.0 s6.2 KiB
www.worldscientific.com/sda/1476/WS.new.ecatalogue.png0.0 ms4.9 KiB
www.worldscientific.com/sda/1476/WS.new.ealert.png0.0 ms4.7 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
sibautomation.com/sa.js?key=2vi0d2rds5mfq4f27x2surwv60.0 s4.3 KiB
/mcjs-connected/js/users/5a49d15f21f692f9e1dbd7609/a628ed...229.0 s3.1 KiB
ct.pinterest.com/static/ct/token_create.js7200.0 s3.9 KiB
/products/wspc/releasedAssets/js/vendors~lazy-imports-5f4...604800.0 s27.4 KiB
s.pinimg.com/ct/lib/main.10d2511a.js1209600.0 s27.6 KiB
wspc.scienceconnect.io/assets/teaser-8K1rvZBW.js0.0 ms2.5 KiB
d1l6p2sc9645hc.cloudfront.net/tracker.js43200.0 s4.9 KiB
js.trendmd.com/trendmd.min.js14400.0 s3.5 KiB
analytics.ahrefs.com/analytics.js14400.0 s3.0 KiB
/products/wspc/releasedAssets/js/vendors~slideshow-e2f290...604800.0 s16.1 KiB
wspc.scienceconnect.io/assets/Avatar-DoC_9Veb.js0.0 ms1.6 KiB
s.pinimg.com/ct/core.js7200.0 s2.1 KiB
wspc.scienceconnect.io/assets/AvatarIcon-buone_RT.js0.0 ms1006 B
wspc.scienceconnect.io/assets/ConnectIcon-B9oe1OFk.js0.0 ms813 B
/collect?v=2&fmt=js&pid=5033212%2C1919890&time=1776893221...0.0 ms690 B
/rp.gif?ts=1776893220960&id=t2_7a1o3y5og&event=PageVisit&...0.0 ms666 B
/collect?v=2&fmt=js&pid=5033212%2C1919890&time=1776893221...0.0 ms569 B
wspc.scienceconnect.io/assets/SwapHoriz-BDRnEgtA.js0.0 ms516 B
/_/ad/544b1d21775a45b58d4e3e93112f4b02/pixel?j=1&u=https%...0.0 ms471 B
/products/wspc/releasedAssets/js/dynamic-imports-0fd3fc05...604800.0 s4.2 KiB
/_/ad/544b1d21775a45b58d4e3e93112f4b02/pixel?j=1&u=https%...0.0 ms293 B
/products/wspc/releasedAssets/js/build.lazyload.bundle-b6...604800.0 s2.2 KiB
/products/wspc/releasedAssets/js/lazy-imports-7cdf982f96e...604800.0 s1.7 KiB
/products/wspc/releasedAssets/js/slideshow-74167cf91d97a4...604800.0 s1.3 KiB
/products/wspc/releasedAssets/css/print-66a265cf9ffa18777...604800.0 s708 B
/products/wspc/releasedAssets/js/requestidlecallback-poly...604800.0 s472 B
/tr/?id=162493725769742&ev=ViewContent&dl=https%3A%2F%2Fw...0.0 ms19 B
/tr/?id=162493725769742&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
/tr/?id=731609284183339&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B

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.

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:6.21 source:map[column:30255 line:2 type:source-location url:https://www.worldscientific.com/templates/jsp/js/jquery-3.1.1.min.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:7.902 source:map[column:8566 line:224 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.803 source:map[column:52748 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.369 source:map[column:52840 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.337 source:map[column:52938 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.397 source:map[column:88925 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:3.613 source:map[type:text value:[unattributed]]] map[reflowTime:0.669 source:map[column:38706 line:224 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.778 source:map[column:53973 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:3.421 source:map[column:52062 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:5.012 source:map[column:52040 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:1.082 source:map[column:90606 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:7.178 source:map[column:84194 line:25 type:source-location url:https://www.worldscientific.com/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f7b663f66.js urlProvider:network]] map[reflowTime:0.31 source:map[column:1443 line:0 type:source-location url:https://www.worldscientific.com/cdn-cgi/challenge-platform/scripts/jsd/main.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Congratulations - Awarded the Nobel Prize in Physics 2025 div.slide-item > a > picture > img
/pb-assets/Slider/nobel-physics-2025-674x180-175997043149...99.8 KiB80.1 KiB
The cover of Requirements Modeling and Coding An Object-Oriented Approach li.col-sm-4 > p > a > img#01-imgtitle-q0260
www.worldscientific.com/action/showCoverImage?doi=10.1142/q026083.0 KiB77.4 KiB
Science Writing and Professional Development Guide Collection div.slide-item > a > picture > img
/pb-assets/Slider/WSPC-ScienceWriting-674x180-15961005848...94.9 KiB75.1 KiB
CCE tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=cce79.4 KiB73.8 KiB
The cover of The Reasoning of Traditional Chinese Medicine div.col-sm-4 > p > a > img#01-imgtitle-q0386
www.worldscientific.com/action/showCoverImage?doi=10.1142/q038676.0 KiB70.4 KiB
The cover of Equivariant and Coordinate Independent Convolutional Networks A Ga… div#controller > div.catalogues > a > img#01-imgtitle-14143
www.worldscientific.com/action/showCoverImage?doi=10.1142/1414372.9 KiB67.3 KiB
The cover of Chen-Ning Yang World Scientific Collection div#controller > div.catalogues > a > img#01-imgtitle-14686
www.worldscientific.com/action/showCoverImage?doi=10.1142/1468671.9 KiB66.3 KiB
Congratulations - Awarded the 2025 Nobel Prize in Chemistry div.slide-item > a > picture > img
/pb-assets/Slider/nobel-chemistry-2025-674x180-1759974586...84.5 KiB64.8 KiB
The cover of Computer Architecture Digital Circuits to Microprocessors li.col-sm-4 > p > a > img#01-imgtitle-10940
www.worldscientific.com/action/showCoverImage?doi=10.1142/1094069.4 KiB63.8 KiB
Congratulations to Philippe Aghion div.slide-item > a > picture > img
/pb-assets/Slider/nobel-economic-2025-674x180-17604346086...74.4 KiB54.6 KiB
The cover of Emergent Gauge Symmetries in Particle Physics and Cosmology div.col-sm-4 > p > a > img#01-imgtitle-14265
www.worldscientific.com/action/showCoverImage?doi=10.1142/1426560.2 KiB54.6 KiB
The cover of Functional Analysis for Mathematical Sciences div#controller > div.catalogues > a > img#01-imgtitle-q0539
www.worldscientific.com/action/showCoverImage?doi=10.1142/q053957.7 KiB52.1 KiB
The cover of Big Data Management and Analytics div.col-sm-4 > p > a > img#01-imgtitle-12869
www.worldscientific.com/action/showCoverImage?doi=10.1142/1286954.9 KiB49.3 KiB
In Memory of Prof. Yang Chen-Ning (1922 - 2025) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/CNYang-news-674x180-1761038909647.png68.7 KiB48.9 KiB
Exclusive Publisher - Nobel Prize, Wolf Prize & Medallists Lectures center > p > a > img
www.worldscientific.com/sda/1476/Nobel.corporate.page.jpg59.6 KiB47.8 KiB
The cover of ADHD is Not an Illness and Ritalin is Not a Cure A Comprehensive R… li.col-sm-4 > p > a > img#01-imgtitle-12752
www.worldscientific.com/action/showCoverImage?doi=10.1142/1275252.3 KiB46.7 KiB
In Memory of Dr. Giovanni G. Fazio (1933–2026) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/GiovanniFazio-674x180-1771995964950.png60.0 KiB40.3 KiB
div > div.main-container > main.content > div.top-image div > div.main-container > main.content > div.top-image
/products/wspc/releasedAssets/images/banner-corporate-34a...104.2 KiB31.0 KiB
IJMPB tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=ijmpb32.8 KiB29.4 KiB
IJMPA tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=ijmpa31.2 KiB27.7 KiB
World Scientific Connect: Gateway to your Digital Library div.pb-las > center > a > img
www.worldscientific.com/sda/1476/sideadv-connect.jpg23.4 KiB16.6 KiB
Collaborating with Leading Scientific Foundations and Academies div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/Academies-674x180-1773283080377.png33.4 KiB13.7 KiB
Textbooks div.row > div.column > a > img
www.worldscientific.com/sda/1476/WS.new.textbook.png11.0 KiB9.4 KiB
Congratulations - Charles Bennett and Gilles Brassard on A.M. Turing Award div.slide-item > a > picture > img
/pb-assets/Slider/CharlesBennett-GillesBrassard-674x180-1...26.2 KiB6.5 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-17-DIV
nodeLabel: div > div.main-container > main.content > div.top-image
path: 1,HTML,1,BODY,0,DIV,0,DIV,1,DIV,0,MAIN,0,DIV
selector: div > div.main-container > main.content > div.top-image
snippet: <div class="top-image" style="height: 299.578px;">

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
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
www.worldscientific.com/templates/jsp/js/jquery-3.1.1.min.js30.8 KiB250 ms
fonts.googleapis.com/css?family=Open+Sans:400,600,7002.2 KiB205 ms

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
/products/wspc/releasedAssets/fonts/icomoon-b76ca74d4bf59...15 ms
/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu...5.0 ms
/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTSGmu...5.0 ms

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: 1.5 s
URLTime Spent
worldscientific.com/397 ms
www.worldscientific.com/386 ms
www.worldscientific.com/action/oidcStart?redirectUri=%2F306 ms
/api/oauth/authorize?ui_locales=en&scope=affiliations+mer...246 ms
/action/oidcCallback?idpCode=connect&error=login_required...209 ms
www.worldscientific.com/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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.

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: 200 ms 502.8 KiB
URLTransfer SizeEst Savings
/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f...130.2 KiB85.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-NVG6FP174.1 KiB70.0 KiB
www.googletagmanager.com/gtag/destination?id=AW-1071980501&cx=c&gtm=4e64k0144.6 KiB69.2 KiB
www.googletagmanager.com/gtag/js?id=G-CHQ29MQVMT&cx=c&gtm=4e64k0178.5 KiB66.9 KiB
www.googletagmanager.com/gtag/js?id=UA-498241-2&cx=c&gtm=4e64k0125.0 KiB64.2 KiB
www.worldscientific.com/wro/4e0fc008aa4e0f67d08cebb5f000b5dd8fe8e1f5~product.js51.7 KiB39.7 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.7 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB29.6 KiB
/products/wspc/releasedAssets/js/vendors~lazy-imports-5f4...27.2 KiB20.1 KiB
www.worldscientific.com/templates/jsp/js/jquery-3.1.1.min.js30.6 KiB20.0 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
Unattributable609 ms14 ms0.0 ms
www.worldscientific.com/460 ms35 ms3.4 ms
www.googletagmanager.com/gtm.js?id=GTM-NVG6FP261 ms212 ms27 ms
/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f...180 ms118 ms20 ms
www.googletagmanager.com/gtag/js?id=G-CHQ29MQVMT&cx=c&gtm=4e64k0176 ms150 ms24 ms
www.worldscientific.com/cdn-cgi/challenge-platform/scripts/jsd/main.js170 ms157 ms1.5 ms
www.worldscientific.com/templates/jsp/js/jquery-3.1.1.min.js163 ms89 ms3.9 ms
/products/wspc/releasedAssets/js/vendors~slideshow-e2f290...126 ms98 ms2.5 ms
script.hotjar.com/modules.6a0f3932cb1341a35c18.js115 ms92 ms8.9 ms
connect.facebook.net/en_US/fbevents.js90 ms69 ms20 ms
/signals/config/162493725769742?v=2.9.303&r=stable&domain...84 ms73 ms8.0 ms
www.googletagmanager.com/gtag/destination?id=AW-1071980501&cx=c&gtm=4e64k080 ms63 ms16 ms
scripts.clarity.ms/0.8.59/clarity.js79 ms60 ms3.3 ms
static.ads-twitter.com/uwt.js78 ms54 ms7.2 ms
www.googletagmanager.com/gtag/js?id=UA-498241-2&cx=c&gtm=4e64k057 ms42 ms14 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
Other800 ms
Style & Layout253 ms
Script Parsing & Compilation219 ms
Garbage Collection123 ms
Parse HTML & CSS85 ms
Rendering63 ms

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 129.0 KiB
URLTransfer SizeEst Savings
/products/wspc/releasedAssets/css/build-66a265cf9ffa18777...112.8 KiB110.3 KiB
www.worldscientific.com/wro/4e0fc008aa4e0f67d08cebb5f000b5dd8fe8e1f5~product.css18.6 KiB18.6 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.worldscientific.com/pb-assets/temp/bookinfo.csv1.1 MiB
www.googletagmanager.com/gtag/js?id=G-CHQ29MQVMT&cx=c&gtm=4e64k0178.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-NVG6FP174.5 KiB
www.googletagmanager.com/gtag/destination?id=AW-1071980501&cx=c&gtm=4e64k0144.7 KiB
/products/wspc/releasedAssets/js/main.bundle-fc7f9bc0e12f...130.5 KiB
www.googletagmanager.com/gtag/js?id=UA-498241-2&cx=c&gtm=4e64k0125.0 KiB
/products/wspc/releasedAssets/css/build-66a265cf9ffa18777...113.0 KiB
/products/wspc/releasedAssets/images/banner-corporate-34a...104.5 KiB
/pb-assets/Slider/nobel-physics-2025-674x180-175997043149...100.3 KiB
connect.facebook.net/en_US/fbevents.js96.6 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
In Memory of Prof. Yang Chen-Ning (1922 - 2025) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/CNYang-news-674x180-1761038909647.png
Congratulations to Philippe Aghion div.slide-item > a > picture > img
/pb-assets/Slider/nobel-economic-2025-674x180-17604346086...
Congratulations - Awarded the 2025 Nobel Prize in Chemistry div.slide-item > a > picture > img
/pb-assets/Slider/nobel-chemistry-2025-674x180-1759974586...
Congratulations - Awarded the Nobel Prize in Physics 2025 div.slide-item > a > picture > img
/pb-assets/Slider/nobel-physics-2025-674x180-175997043149...
Science Writing and Professional Development Guide Collection div.slide-item > a > picture > img
/pb-assets/Slider/WSPC-ScienceWriting-674x180-15961005848...
Congratulations - Charles Bennett and Gilles Brassard on A.M. Turing Award div.slide-item > a > picture > img
/pb-assets/Slider/CharlesBennett-GillesBrassard-674x180-1...
Collaborating with Leading Scientific Foundations and Academies div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/Academies-674x180-1773283080377.png
In Memory of Anthony James Leggett - 1938-2026 div.slide-item > a > picture > img
/pb-assets/Slider/Anthony-James-Leggett-674x180-177311570...
In Memory of Dr. Giovanni G. Fazio (1933–2026) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/GiovanniFazio-674x180-1771995964950.png
In Memory of Prof. Yang Chen-Ning (1922 - 2025) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/CNYang-news-674x180-1761038909647.png
Congratulations to Philippe Aghion div.slide-item > a > picture > img
/pb-assets/Slider/nobel-economic-2025-674x180-17604346086...
Congratulations - Awarded the 2025 Nobel Prize in Chemistry div.slide-item > a > picture > img
/pb-assets/Slider/nobel-chemistry-2025-674x180-1759974586...
Congratulations - Awarded the Nobel Prize in Physics 2025 div.slide-item > a > picture > img
/pb-assets/Slider/nobel-physics-2025-674x180-175997043149...
Science Writing and Professional Development Guide Collection div.slide-item > a > picture > img
/pb-assets/Slider/WSPC-ScienceWriting-674x180-15961005848...
Congratulations - Charles Bennett and Gilles Brassard on A.M. Turing Award div.slide-item > a > picture > img
/pb-assets/Slider/CharlesBennett-GillesBrassard-674x180-1...
Collaborating with Leading Scientific Foundations and Academies div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/Academies-674x180-1773283080377.png
In Memory of Anthony James Leggett - 1938-2026 div.slide-item > a > picture > img
/pb-assets/Slider/Anthony-James-Leggett-674x180-177311570...
In Memory of Dr. Giovanni G. Fazio (1933–2026) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/GiovanniFazio-674x180-1771995964950.png
In Memory of Prof. Yang Chen-Ning (1922 - 2025) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/CNYang-news-674x180-1761038909647.png
Exclusive Publisher - Nobel Prize, Wolf Prize & Medallists Lectures center > p > a > img
www.worldscientific.com/sda/1476/Nobel.corporate.page.jpg
World Scientific Connect: Gateway to your Digital Library div.pb-las > center > a > img
www.worldscientific.com/sda/1476/sideadv-connect.jpg
World Scientific div.container > div.pull-left > a > img
/pb-assets/releasedAssets/images/WSPC-LOGO-250-1541381839...
E-alert div.row > div.column > a > img
www.worldscientific.com/sda/1476/WS.new.ealert.png
E-Catalogue div.row > div.column > a > img
www.worldscientific.com/sda/1476/WS.new.ecatalogue.png
Textbooks div.row > div.column > a > img
www.worldscientific.com/sda/1476/WS.new.textbook.png
World Sientific Logo div.row > div.col-sm-3 > a > img
/pb-assets/releasedAssets/images/WSPClogo-white-152894654...
World Scientific Youtube center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/youtubeicon-1533103772463.png
World Scientific Newsletter Subscribe center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/emailicon-1533103772177.png
World Scientific Chinese Site center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/wechaticon-1533103772450.png
World Scientific X Platform center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/twittericon-1724984838873.png
World Scientific Linkedin center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/linkedinicon-1533103772177.png
World Scientific Facebook center > div > a > img
www.worldscientific.com/pb-assets/wspc-site/icons/facebookicon-1533103772177.png

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 12 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 90 ms
●Server Backend Latencies 230 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 180 ms
●Avoid large layout shifts 5 layout shifts found
○INP breakdown
○Avoid non-composited animations
92

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.

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
Learn More div#cookieBanner > div.b-body > u > a

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Learn More div#cookieBanner > div.b-body > u > a

These are opportunities to improve the legibility of your content.

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
WHAT'S NEW div.row > div.gutterless > div.background-light-gray > h3.section__header

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
●`[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
●Input buttons have discernible text.
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●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.
●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<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.
○`<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.
○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.
69

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
IJMPB tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=ijmpb157 x 218 (0.72)467 x 702 (0.67)
The cover of Honour and Shame Mistreatment of, Violence Against, and Attitudes … div#controller > div.catalogues > a > img#01-imgtitle-14484
www.worldscientific.com/action/showCoverImage?doi=10.1142/14484158 x 218 (0.72)450 x 680 (0.66)
IJMPA tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=ijmpa157 x 218 (0.72)450 x 675 (0.67)
The cover of Selected Topics in Quantum Field Theory div#controller > div.catalogues > a > img#01-imgtitle-14499
www.worldscientific.com/action/showCoverImage?doi=10.1142/14499158 x 218 (0.72)446 x 680 (0.66)
CCE tr > td.expandtd > a > img
www.worldscientific.com/action/showCoverImage?journalCode=cce157 x 218 (0.72)450 x 671 (0.67)
The cover of ADHD is Not an Illness and Ritalin is Not a Cure A Comprehensive R… li.col-sm-4 > p > a > img#01-imgtitle-12752
www.worldscientific.com/action/showCoverImage?doi=10.1142/12752158 x 218 (0.72)450 x 668 (0.67)
The cover of Functional Analysis for Mathematical Sciences div#controller > div.catalogues > a > img#01-imgtitle-q0539
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0539158 x 218 (0.72)450 x 667 (0.67)
The cover of Equivariant and Coordinate Independent Convolutional Networks A Ga… div#controller > div.catalogues > a > img#01-imgtitle-14143
www.worldscientific.com/action/showCoverImage?doi=10.1142/14143158 x 218 (0.72)450 x 667 (0.67)
The cover of Holography &amp; Homology of Traversing Flows div#controller > div.catalogues > a > img#01-imgtitle-14506
www.worldscientific.com/action/showCoverImage?doi=10.1142/14506158 x 218 (0.72)450 x 667 (0.67)
The cover of From Integers to the Big Bang The Historical Development of Mathem… div#controller > div.catalogues > a > img#01-imgtitle-14530
www.worldscientific.com/action/showCoverImage?doi=10.1142/14530158 x 218 (0.72)450 x 667 (0.67)
The cover of Ethics and Mathematics For Students by Students div#controller > div.catalogues > a > img#01-imgtitle-14429
www.worldscientific.com/action/showCoverImage?doi=10.1142/14429158 x 218 (0.72)450 x 667 (0.67)
The cover of A Problem-Based Introduction to Special and General Relativity Inc… div#controller > div.catalogues > a > img#01-imgtitle-14266
www.worldscientific.com/action/showCoverImage?doi=10.1142/14266158 x 218 (0.72)450 x 667 (0.67)
The cover of Reviews of Light and Heavy Particle Collisions with Atoms and Mole… div#controller > div.catalogues > a > img#01-imgtitle-14632
www.worldscientific.com/action/showCoverImage?doi=10.1142/14632158 x 218 (0.72)450 x 667 (0.67)
The cover of The Hydrogen Atom Doorway to Quantum Physics, its Symmetries and R… div#controller > div.catalogues > a > img#01-imgtitle-14500
www.worldscientific.com/action/showCoverImage?doi=10.1142/14500158 x 218 (0.72)450 x 667 (0.67)
The cover of Electronics for Scientists Practical Essentials for Modern Research div#controller > div.catalogues > a > img#01-imgtitle-14535
www.worldscientific.com/action/showCoverImage?doi=10.1142/14535158 x 218 (0.72)450 x 667 (0.67)
The cover of Rethinking Quality The Innovative, Agile Tools and Concepts of Sup… div#controller > div.catalogues > a > img#01-imgtitle-q0517
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0517158 x 218 (0.72)450 x 667 (0.67)
The cover of Electrostatic Basis of Biological Actions div#controller > div.catalogues > a > img#01-imgtitle-14507
www.worldscientific.com/action/showCoverImage?doi=10.1142/14507158 x 218 (0.72)450 x 667 (0.67)
The cover of The Many Worlds of Linus Pauling div#controller > div.catalogues > a > img#01-imgtitle-14370
www.worldscientific.com/action/showCoverImage?doi=10.1142/14370158 x 218 (0.72)450 x 667 (0.67)
The cover of Elements of Marcus Theory of Electron Transfer Reactions For Elect… div#controller > div.catalogues > a > img#01-imgtitle-14347
www.worldscientific.com/action/showCoverImage?doi=10.1142/14347158 x 218 (0.72)450 x 667 (0.67)
The cover of Lecture Notes on Collaborative Software Projects Practices, Concep… div#controller > div.catalogues > a > img#01-imgtitle-14662
www.worldscientific.com/action/showCoverImage?doi=10.1142/14662158 x 218 (0.72)450 x 667 (0.67)
The cover of An Introduction to the Analysis of Algorithms 4th Edition div#controller > div.catalogues > a > img#01-imgtitle-14590
www.worldscientific.com/action/showCoverImage?doi=10.1142/14590158 x 218 (0.72)450 x 667 (0.67)
The cover of Fundamentals of Electric Power Engineering A Second, Updated and E… div#controller > div.catalogues > a > img#01-imgtitle-14434
www.worldscientific.com/action/showCoverImage?doi=10.1142/14434158 x 218 (0.72)450 x 667 (0.67)
The cover of Energy Transitions The AI–Energy Nexus div#controller > div.catalogues > a > img#01-imgtitle-14502
www.worldscientific.com/action/showCoverImage?doi=10.1142/14502158 x 218 (0.72)450 x 667 (0.67)
The cover of Theories and Predictions on Ozone Depletion and Climate Change div#controller > div.catalogues > a > img#01-imgtitle-14613
www.worldscientific.com/action/showCoverImage?doi=10.1142/14613158 x 218 (0.72)450 x 667 (0.67)
The cover of More from the Cutting Edge of Tribology Another Decade of Progress… div#controller > div.catalogues > a > img#01-imgtitle-14378
www.worldscientific.com/action/showCoverImage?doi=10.1142/14378158 x 218 (0.72)450 x 667 (0.67)
The cover of Emergent Gauge Symmetries in Particle Physics and Cosmology div.col-sm-4 > p > a > img#01-imgtitle-14265
www.worldscientific.com/action/showCoverImage?doi=10.1142/14265158 x 218 (0.72)450 x 667 (0.67)
The cover of Big Data Management and Analytics div.col-sm-4 > p > a > img#01-imgtitle-12869
www.worldscientific.com/action/showCoverImage?doi=10.1142/12869158 x 218 (0.72)450 x 667 (0.67)
The cover of Requirements Modeling and Coding An Object-Oriented Approach li.col-sm-4 > p > a > img#01-imgtitle-q0260
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0260158 x 218 (0.72)450 x 666 (0.68)
The cover of Cohesive Societies, Resilient Futures div#controller > div.catalogues > a > img#01-imgtitle-14616
www.worldscientific.com/action/showCoverImage?doi=10.1142/14616158 x 218 (0.72)450 x 665 (0.68)
The cover of Credit Market Innovations How Institutions, Technology, and Regula… div#controller > div.catalogues > a > img#01-imgtitle-q0533
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0533158 x 218 (0.72)450 x 665 (0.68)
The cover of The Reasoning of Traditional Chinese Medicine div.col-sm-4 > p > a > img#01-imgtitle-q0386
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0386158 x 218 (0.72)450 x 665 (0.68)
The cover of Advances in Atomic and Molecular Physics at the Interfaces with th… div#controller > div.catalogues > a > img#01-imgtitle-q0534
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0534158 x 218 (0.72)450 x 662 (0.68)
The cover of Computer Architecture Digital Circuits to Microprocessors li.col-sm-4 > p > a > img#01-imgtitle-10940
www.worldscientific.com/action/showCoverImage?doi=10.1142/10940158 x 218 (0.72)450 x 660 (0.68)
The cover of Mathematical Foundations and Aspects of Discrete Mathematics div#controller > div.catalogues > a > img#01-imgtitle-14508
www.worldscientific.com/action/showCoverImage?doi=10.1142/14508158 x 218 (0.72)450 x 659 (0.68)
The cover of The Ontology of Confucius Jen (Humanity) div#controller > div.catalogues > a > img#01-imgtitle-12778
www.worldscientific.com/action/showCoverImage?doi=10.1142/12778158 x 218 (0.72)450 x 658 (0.68)
The cover of The Nobel Prizes 2023 div#controller > div.catalogues > a > img#01-imgtitle-14710
www.worldscientific.com/action/showCoverImage?doi=10.1142/14710158 x 218 (0.72)450 x 658 (0.68)
The cover of Chronicling Themes in the Economic and Social History of Malaysia div#controller > div.catalogues > a > img#01-imgtitle-14439
www.worldscientific.com/action/showCoverImage?doi=10.1142/14439158 x 218 (0.72)450 x 644 (0.70)
The cover of Chen-Ning Yang World Scientific Collection div#controller > div.catalogues > a > img#01-imgtitle-14686
www.worldscientific.com/action/showCoverImage?doi=10.1142/14686158 x 218 (0.72)450 x 642 (0.70)
The cover of Solid Mechanics with Python Cartesian Coordinates div#controller > div.catalogues > a > img#01-imgtitle-14400
www.worldscientific.com/action/showCoverImage?doi=10.1142/14400158 x 218 (0.72)450 x 640 (0.70)
The cover of Modern Mathematical Concepts for Engineers Part I: From Infinitesi… div#controller > div.catalogues > a > img#01-imgtitle-q0509
www.worldscientific.com/action/showCoverImage?doi=10.1142/q0509158 x 218 (0.72)450 x 639 (0.70)
The cover of Advanced Engineering Calculus A Collection of Problems with Soluti… div#controller > div.catalogues > a > img#01-imgtitle-14208
www.worldscientific.com/action/showCoverImage?doi=10.1142/14208158 x 218 (0.72)422 x 680 (0.62)
The cover of International Corporate Finance 3rd Edition div#controller > div.catalogues > a > img#01-imgtitle-14076
www.worldscientific.com/action/showCoverImage?doi=10.1142/14076158 x 218 (0.72)450 x 636 (0.71)
World Scientific Connect: Gateway to your Digital Library div.gutterless > div#connectmsg > a > img
www.worldscientific.com/sda/1476/sideadv-connect.jpg95 x 220 (0.43)420 x 220 (1.91)

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
In Memory of Prof. Yang Chen-Ning (1922 - 2025) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/CNYang-news-674x180-1761038909647.png972 x 260674 x 180972 x 260
In Memory of Dr. Giovanni G. Fazio (1933–2026) div.slide-item > a > picture > img
www.worldscientific.com/pb-assets/Slider/GiovanniFazio-674x180-1771995964950.png972 x 260674 x 180972 x 260
Congratulations to Philippe Aghion div.slide-item > a > picture > img
/pb-assets/Slider/nobel-economic-2025-674x180-17604346086...972 x 260674 x 180972 x 260

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
www.googleadservices.com/pagead/conversion_async.js line 31, col 421
SharedStorage
www.worldscientific.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.worldscientific.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.worldscientific.com/cdn-cgi/challenge-platform/scripts/jsd/main.js

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.worldscientific.com/
Access to XMLHttpRequest at 'https://stats.zotabox.com/api/1.0/event/multi' from origin 'https://www.worldscientific.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
www.worldscientific.com/wro/4e0fc008aa4e0f67d08cebb5f000b5dd8fe8e1f5~product.js line 301, col 263
Failed to fetch user info: 404
stats.zotabox.com/api/1.0/event/multi
Failed to load resource: net::ERR_FAILED
rev.trendmd.com/ad-sets/identifier
Failed to load resource: the server responded with a status of 404 ()
www.worldscientific.com/action/connectTeaserInfo
Failed to load resource: the server responded with a status of 404 ()
js.trendmd.com/trendmd.min.js line 2, col 5099
Uncaught (in promise) Error: Error fetching adSetId
●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
●Page has the HTML doctype
●Properly defines charset
●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
85

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.worldscientific.com/page/help/privacy-policyLearn More

Format your HTML in a way that enables crawlers to better understand your app’s content.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
[ X ] div.header > div#maintenancemsg > div > a

To appear in search results, crawlers need access to your app.

○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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

Send Feedback