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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.

29

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
www.st.com/L9Of/H6I-/ps/5urg/nvMA/3zYDkS2rSf4VJSz5/aioOJQUXBw/dAVoB/lk-JTUB21600.0 s183.0 KiB
www.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js537944.0 s525.5 KiB
search.st.com/widgets/searchbox/index.js71422.0 s141.7 KiB
/etc/designs/st-search-cx/search.min.446389ae6cfe152dcc0c...545255.0 s99.2 KiB
www.st.com/akam/13/7275423821600.0 s12.8 KiB
/etc/clientlibs/st-search-cx/stangularjs.min.901dd2b30b4f...545255.0 s66.1 KiB
s2.go-mpulse.net/boomerang/VQ4BN-JKJ9P-N5ULX-3L5VG-3UADM604800.0 s58.4 KiB
www.st.com/etc/clientlibs/st-crew.min.5f656be71d1f8ed511370bd0611fb4fd.css538452.0 s46.3 KiB
assets.st.com/s7viewers/html5/js/VideoViewer.js29695.0 s9.2 KiB
/etc/clientlibs/st-site-cx/components/home-only-fonts/med...602771.0 s47.9 KiB
/etc.clientlibs/clientlibs/granite/jquery.min.3e24d4d067a...545254.0 s39.1 KiB
/etc/clientlibs/st-site/libs/dataTables.min.15d1ef4b86c76...545254.0 s32.6 KiB
/etc/clientlibs/st-site-cx/components/home-only-fonts/med...465597.0 s23.3 KiB
www.st.com/content/dam/st-crew/st-logo-blue.svg17684.0 s4.6 KiB
/etc/clientlibs/st-crew-header-footer.min.647d68e359d237e...545254.0 s25.9 KiB
www.st.com/etc/clientlibs/st-crew.min.d4ffb17731a0fd996f1412c81e7817e0.js538452.0 s19.9 KiB
www.st.com/astatic/wv/web-vitals.es5.umd.min.js206246.0 s5.4 KiB
/etc/clientlibs/st-site-cx/components/header.min.0a833099...540362.0 s11.6 KiB
/etc.clientlibs/foundation/clientlibs/shared.min.5bb9fccf...545254.0 s10.9 KiB
/etc/designs/st-search-cx/search.min.721107fd235b8929aa6d...545254.0 s10.8 KiB
/etc/clientlibs/st-site-cx/components/font-awesome.min.8a...545255.0 s10.5 KiB
munchkin.marketo.net/munchkin.js0.0 ms1.2 KiB
www.st.com/etc/clientlibs/st-marketo.min.f7702dd63add579f6f4a0b7c468d17e0.js542512.0 s10.1 KiB
www.st.com/etc/clientlibs/modernizr.min.0f6542a649b0362c1b05d1a65003f321.js545255.0 s8.7 KiB
www.st.com/astatic/onetrust/st/OneTrust.min.js463070.0 s6.9 KiB
/etc/clientlibs/st-search-cx/bookmarks.min.7d3207878d9b2a...547427.0 s8.0 KiB
/etc/clientlibs/st-site-cx/components/st-browser-update.m...545255.0 s7.8 KiB
/etc/clientlibs/st-site-cx/components/st-app-head.min.a0b...545255.0 s7.4 KiB
/etc.clientlibs/clientlibs/granite/utils.min.3b86602c4e1e...545254.0 s7.1 KiB
www.st.com/etc/clientlibs/st-site-cx/js/st-utils.js545254.0 s6.8 KiB
search.st.com/widgets/searchbox/index.css74556.0 s1.9 KiB
www.st.com/etc/clientlibs/st-site/js/url-search-params-polyfill.js545255.0 s5.8 KiB
/etc.clientlibs/st-crew/components/editorial/newsUpdates/...545926.0 s5.4 KiB
/etc.clientlibs/clientlibs/granite/jquery/granite.min.011...545254.0 s5.4 KiB
/etc.clientlibs/st-crew/components/editorial/hp-video-tou...546176.0 s5.3 KiB
/etc/clientlibs/st-site-cx/components/footer.min.1be59732...545292.0 s5.2 KiB
/etc.clientlibs/st-site-cx/components/general/navigation/...545292.0 s5.2 KiB
/etc.clientlibs/st-site-cx/components/general/navigation/...537976.0 s5.1 KiB
/etc.clientlibs/st-crew/components/editorial/sustainabili...545926.0 s5.0 KiB
/etc.clientlibs/st-crew/components/editorial/banner/banne...545926.0 s5.0 KiB
/etc/clientlibs/st-search-cx/searchHistory.min.77ac21fb73...545255.0 s5.0 KiB
/etc/clientlibs/st-crew-homepage.min.016982f31108b5da6ec6...545926.0 s5.0 KiB
/etc.clientlibs/st-crew/components/dialogs/crew-video/cre...548271.0 s5.0 KiB
/etc.clientlibs/st-crew/components/editorial/newsUpdates/...545926.0 s4.8 KiB
/etc.clientlibs/st-site-cx/components/general/header/clie...545292.0 s4.8 KiB
/etc.clientlibs/st-site-cx/components/general/header/sub-...539908.0 s4.7 KiB
/etc.clientlibs/st-site-cx/components/general/footer/clie...540900.0 s4.6 KiB
/etc.clientlibs/st-site-cx/components/general/header/sub-...587303.0 s5.1 KiB
/etc/clientlibs/st-search-cx/stcrossreference.min.006481f...545255.0 s4.5 KiB
/etc.clientlibs/st-crew/clientlibs/pop-up-cta.min.c271391...545353.0 s4.5 KiB
/etc/clientlibs/st-site-cx/components/save-to-my-st.min.5...545292.0 s4.4 KiB
/etc/clientlibs/st-search-cx/bookmarks.min.7022ac2d1d228a...545255.0 s4.4 KiB
/etc.clientlibs/st-site-cx/components/general/footer/foot...539931.0 s4.3 KiB
/etc.clientlibs/st-site-cx/components/general/header/clie...539908.0 s4.3 KiB
/etc/clientlibs/custom-activities.min.fc64bc2793ee75d95fa...545292.0 s4.3 KiB
/etc.clientlibs/st-crew/components/editorial/hp-video-tou...546045.0 s4.3 KiB
/etc/clientlibs/st-site-cx/components/info-modal.min.0f48...545292.0 s4.3 KiB
/etc.clientlibs/st-crew/components/editorial/banner/banne...545926.0 s4.3 KiB
/etc.clientlibs/st-crew/components/editorial/sustainabili...545926.0 s4.2 KiB
www.st.com/etc/clientlibs/st-site/js/custom-event-polyfill.js545255.0 s4.2 KiB
/etc.clientlibs/st-crew/components/dialogs/crew-video/cre...545501.0 s4.2 KiB
/etc.clientlibs/st-crew/clientlibs/pop-up-cta.min.5e2ab08...545471.0 s4.1 KiB
/etc/clientlibs/st-site/components/cookiePanel.min.0fb1f0...545292.0 s4.1 KiB
/etc/clientlibs/st-site-cx/components/st-app-head-utils.m...545292.0 s4.0 KiB
www.st.com/etc/clientlibs/service-worker.min.0a46a8c8ffff5114275d30b23c4a9ac6.js545292.0 s3.9 KiB
/etc.clientlibs/foundation/clientlibs/jquery.min.dd9b395c...545254.0 s3.8 KiB
/etc/clientlibs/st-crew-homepage.min.d41d8cd98f00b204e980...545926.0 s3.8 KiB

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.

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-IMG
nodeLabel: div.hp-video-touch-ui-v3-video-html5 > div#CREW: HP top corporate tile > div.hp-top-banner-tablet-and-mobile-container > img.image-darker-55
path: 6,HTML,2,BODY,6,DIV,1,DIV,7,MAIN,4,DIV,0,DIV,0,DIV,0,DIV,0,DIV,2,DIV,13,DIV,0,IMG
selector: div.hp-video-touch-ui-v3-video-html5 > div#CREW: HP top corporate tile > div.hp-top-banner-tablet-and-mobile-container > img.image-darker-55
snippet: <img class="image-darker-55" src="/content/dam/0hp/2026-04/top-banner/9831979_Homepage%20banner%20for%20ST%2…" alt="">

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
/etc.clientlibs/clientlibs/granite/jquery.min.3e24d4d067a...39.1 KiB151 ms
/etc.clientlibs/foundation/clientlibs/shared.min.5bb9fccf...10.9 KiB
/etc.clientlibs/st-site-cx/components/general/header/clie...4.8 KiB
www.st.com/astatic/onetrust/st/OneTrust.min.js6.9 KiB
www.st.com/etc/clientlibs/st-site-cx/js/st-utils.js6.8 KiB
/etc.clientlibs/st-site-cx/components/general/header/sub-...5.1 KiB
/etc/clientlibs/st-site-cx/components/st-app-head-utils.m...4.0 KiB151 ms
/etc.clientlibs/clientlibs/granite/utils.min.3b86602c4e1e...7.1 KiB
/etc.clientlibs/foundation/clientlibs/jquery.min.dd9b395c...3.8 KiB151 ms
/etc.clientlibs/clientlibs/granite/jquery/granite.min.011...5.4 KiB
www.st.com/etc/clientlibs/st-crew.min.5f656be71d1f8ed511370bd0611fb4fd.css46.3 KiB602 ms
/etc/clientlibs/st-site-cx/components/header.min.0a833099...11.6 KiB151 ms
/etc/designs/st-search-cx/search.min.721107fd235b8929aa6d...10.8 KiB
/etc.clientlibs/st-site-cx/components/general/header/sub-...4.7 KiB
/etc.clientlibs/st-site-cx/components/general/header/clie...4.3 KiB
/etc/clientlibs/st-crew-header-footer.min.647d68e359d237e...25.9 KiB452 ms

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
div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Cloud-connected Autonomous Things > img.background div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Cloud-connected Autonomous Things > img.background
www.st.com/content/dam/crew/smart-city-night-buildings.jpg184.0 KiB151.2 KiB
div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Power & Energy > img.background div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Power & Energy > img.background
www.st.com/content/dam/crew/solar-panel-blue-sky.jpg142.5 KiB108.4 KiB
div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Smart Mobility > img.background div.row > div.col-lg-8 > div#CREW:Product_and_Innovations:Smart Mobility > img.background
www.st.com/content/dam/crew/drone-takeoff-building.jpg87.5 KiB51.1 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: 2.9 s
URLTime Spent
st.com/2.1 s
www.st.com/818 ms
www.st.com/content/st_com/en.html0.0 ms

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.

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: 300 ms 61.4 KiB
URLTransfer SizeEst Savings
www.st.com/etc/clientlibs/st-crew.min.5f656be71d1f8ed511370bd0611fb4fd.css42.5 KiB41.1 KiB
/etc/clientlibs/st-crew-header-footer.min.647d68e359d237e...22.1 KiB20.3 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: 900 ms 814.5 KiB
URLTransfer SizeEst Savings
www.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js521.6 KiB344.1 KiB
/etc/designs/st-search-cx/search.min.446389ae6cfe152dcc0c...95.4 KiB77.9 KiB
www.googletagmanager.com/gtag/js?id=G-4V6BSG3B5Y&cx=c&gtm=4e64h1177.8 KiB66.7 KiB
www.googletagmanager.com/gtag/js?id=AW-965727604&cx=c&gtm=4e64h1146.6 KiB64.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-NMB29WK167.0 KiB58.4 KiB
search.st.com/widgets/searchbox/index.js140.3 KiB55.0 KiB
/etc/clientlibs/st-search-cx/stangularjs.min.901dd2b30b4f...62.3 KiB41.7 KiB
www.st.com/L9Of/H6I-/ps/5urg/nvMA/3zYDkS2rSf4VJSz5/aioOJQUXBw/dAVoB/lk-JTUB178.6 KiB37.7 KiB
s2.go-mpulse.net/boomerang/VQ4BN-JKJ9P-N5ULX-3L5VG-3UADM58.3 KiB24.8 KiB
/etc/clientlibs/st-site/libs/dataTables.min.15d1ef4b86c76...28.8 KiB23.5 KiB
cdn.decibelinsight.net/i/13951/335449/di.js64.8 KiB20.5 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
www.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js1.7 s1.5 s218 ms
cdn.decibelinsight.net/i/13951/335449/di.js685 ms573 ms19 ms
www.st.com/L9Of/H6I-/ps/5urg/nvMA/3zYDkS2rSf4VJSz5/aioOJQUXBw/dAVoB/lk-JTUB621 ms568 ms38 ms
www.st.com/content/st_com/en.html543 ms70 ms24 ms
/etc.clientlibs/clientlibs/granite/jquery.min.3e24d4d067a...525 ms436 ms7.7 ms
Unattributable485 ms46 ms0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-NMB29WK471 ms430 ms38 ms
search.st.com/widgets/searchbox/index.js342 ms208 ms118 ms
www.googletagmanager.com/gtag/js?id=G-4V6BSG3B5Y&cx=c&gtm=4e64h1279 ms240 ms37 ms
www.googletagmanager.com/gtag/js?id=AW-965727604&cx=c&gtm=4e64h1185 ms156 ms28 ms
www.st.com/akam/13/72754238154 ms138 ms9.1 ms
s2.go-mpulse.net/boomerang/VQ4BN-JKJ9P-N5ULX-3L5VG-3UADM133 ms85 ms19 ms
www.st.com/astatic/onetrust/st/OneTrust.min.js123 ms120 ms0.9 ms
/etc/designs/st-search-cx/search.min.446389ae6cfe152dcc0c...80 ms33 ms37 ms
/etc.clientlibs/st-site-cx/components/general/header/clie...56 ms39 ms1.1 ms
/etc/clientlibs/st-search-cx/searchHistory.min.77ac21fb73...55 ms52 ms0.7 ms
www.st.com/etc/clientlibs/modernizr.min.0f6542a649b0362c1b05d1a65003f321.js51 ms28 ms1.7 ms
/etc/clientlibs/st-site-cx/components/st-browser-update.m...51 ms49 ms0.9 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 Evaluation4.9 s
Other675 ms
Script Parsing & Compilation645 ms
Style & Layout317 ms
Parse HTML & CSS123 ms
Garbage Collection97 ms
Rendering67 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 217.0 KiB
URLTransfer SizeEst Savings
www.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js521.7 KiB217.0 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.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js525.5 KiB
www.st.com/content/dam/crew/smart-city-night-buildings.jpg187.7 KiB
www.st.com/L9Of/H6I-/ps/5urg/nvMA/3zYDkS2rSf4VJSz5/aioOJQUXBw/dAVoB/lk-JTUB183.0 KiB
www.googletagmanager.com/gtag/js?id=G-4V6BSG3B5Y&cx=c&gtm=4e64h1177.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-NMB29WK167.3 KiB
www.googletagmanager.com/gtag/js?id=AW-965727604&cx=c&gtm=4e64h1146.7 KiB
www.st.com/content/dam/crew/solar-panel-blue-sky.jpg146.2 KiB
search.st.com/widgets/searchbox/index.js141.7 KiB
/etc/designs/st-search-cx/search.min.446389ae6cfe152dcc0c...99.2 KiB
www.st.com/content/dam/crew/drone-takeoff-building.jpg91.2 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
STMicroelectronics Logo div.row > div.st-footer-logo-wrap > a > img
www.st.com/content/dam/st-crew/st-logo-blue.svg

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
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 8 user timings
●Avoid long main-thread tasks 20 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 1,230 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 110 ms
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
89

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
div.MuiAutocomplete-root > div.MuiFormControl-root > div.MuiInputBase-root > input#queryText div.MuiAutocomplete-root > div.MuiFormControl-root > div.MuiInputBase-root > input#queryText

These are opportunities to improve the legibility of your content.

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to main content div.fixed > header.show-for-medium-down > div.header-accessibilityCta > a.js-focus-accessibilityCta

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Sales terms & conditions div.small-12 > div.st-footer__copy > div.st-footer__links > a
Trademarks div.small-12 > div.st-footer__copy > div.st-footer__links > a
Manage cookies div.small-12 > div.st-footer__copy > div.st-footer__links > a.optanon-toggle-display

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Advanced, safe BMS designs ST BMS hardware and MathWorks tools accelerate safe… div.col-lg-8 > div#CREW:Product_and_Innovations:Smart Mobility > div.cards > a.card
Fast, accurate electronic fuse STi²Fuse smart switch ensures safe and reliable… div.col-lg-8 > div#CREW:Product_and_Innovations:Smart Mobility > div.cards > a.card
Peak power efficiency Achieve maximum conversion efficiency with our 3A synchr… div.col-lg-8 > div#CREW:Product_and_Innovations:Power & Energy > div.cards > a.card
1200 V SCR: no potting TO247HC geometry eliminates potting up to 470 Vrms. 6.7… div.col-lg-8 > div#CREW:Product_and_Innovations:Power & Energy > div.cards > a.card
STM32WBA2 Nucleo‑64 board Prototype cost‑ and energy‑efficient Bluetooth® LE d… div.col-lg-8 > div#CREW:Product_and_Innovations:Cloud-connected Autonomous Things > div.cards > a.card
Track, monitor & protect Ultra-precise, self-configurable IMU captures the sli… div.col-lg-8 > div#CREW:Product_and_Innovations:Cloud-connected Autonomous Things > div.cards > a.card
Contact ST offices nav > ul.st-footer__nav > li > a
Find sales offices & distributors nav > ul.st-footer__nav > li > a
○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
●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.
●`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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Identical links have the same purpose.
○`[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
○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
○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.
○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.
77

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
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
/etc.clientlibs/clientlibs/granite/jquery/granite.min.011... line 5, col 382

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.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.js line 46314, col 24
Marketo lead association: munchkin cookie has not been initialized.
www.st.com/content/st_com/en.html line 352, col 66
TypeError: Cannot read properties of undefined (reading 'includes') at HTMLSpanElement.<anonymous> (https://www.st.com/content/st_com/en.html:353:67) at c.each (https://www.st.com/etc.clientlibs/clientlibs/granite/jquery.min.3e24d4d067ac58228b5004abb50344ef.js:50:175) at c.fn.init.each (https://www.st.com/etc.clientlibs/clientlibs/granite/jquery.min.3e24d4d067ac58228b5004abb50344ef.js:46:132) at HTMLDocument.<anonymous> (https://www.st.com/content/st_com/en.html:352:31)

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
www.st.com/L9Of/H6I-/ps/5urg/nvMA/3zYDkS2rSf4VJSz5/aioOJQUXBw/dAVoB/lk-JTUB
www.st.com/etc/clientlibs/st-site-cx.min.3102257c92a26417796eec1cc4af6c93.jswww.st.com/etc/clientlibs/simplebar.umd.es5.js.map
●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 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
○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.

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
MCU Developer Zone div > ul.font-lubalin > li#mcu-not-expanded > a
MPU Developer Zone div > ul.font-lubalin > li#mpu-not-expanded > a
ST Edge AI Suite div > ul.font-lubalin > li#edge-ai-not-expanded > a
{{level_1.browseAllBtnText}} div.st-nav__submenu-container > div.st-nav__submenu-list-container > div.browse-all-button > a.st-button
{{level_2.title}} div.st-nav__submenu-list-container > ul > li.st-nav__submenu-item > a.st-nav__submenu-link
{{level_2.title}} div.st-nav__submenu-list-container > ul > li.st-nav__submenu-item > a.st-nav__submenu-link
Browse {{level_2.title}} div.st-nav__submenu-list-container > div.st-nav__subsubmenu > div.st-nav__subsubmenu-header > a.st-nav__subsubmenu-link
{{level_3.title}} div.st-nav__subsubmenu-grid > div.st-nav__subsubmenu-item > div.st-nav__blockmenu > a.st-nav__blockmenu-title
{{level_4.title}} div.st-nav__blockmenu > ul.st-nav__blockmenu-list > li.st-nav__blockmenu-item > a.st-nav__blockmenu-link
Find your next adventure div.modal-content > div.stc-legalrecruiting-textcontent > div.stc-legalrecruiting-link-wrap > a

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
●Links have descriptive text
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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