Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

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.

Request	Cache TTL	Transfer Size
/sites/default/files/css/css_VHFSSqtIg7OyP4OWp19i0KN5Bdeo...	604800.0 s	1.1 MiB
www.osha.gov/sites/default/files/homepage/public-resource-box-stand-down.png	604800.0 s	1.1 MiB
/sites/default/files/css/css_CqWlq2Olkr9xvaq7qmYVbR6-R3nO...	604800.0 s	1.0 MiB
www.osha.gov/sites/default/files/homepage/WM-hero.png	604800.0 s	669.0 KiB
www.osha.gov/sites/default/files/homepage/Career_Safe_teaser.png	604800.0 s	434.5 KiB
/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OE...	604800.0 s	186.8 KiB
www.osha.gov/sites/default/files/OSHA-is-Hiring_HOMEPAGE.png	604800.0 s	129.7 KiB
/Universal-Federated-Analytics-Min.js?agency=DOL&subagenc...	0.0 ms	9.4 KiB
/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-...	604800.0 s	92.7 KiB
www.osha.gov/sites/default/files/homepage/SC_Logo2.png	604800.0 s	79.9 KiB
siteimproveanalytics.com/js/siteanalyze_6313124.js	86400.0 s	14.6 KiB
/sites/default/files/homepage/Freedom250Logo-RGB-FullColo...	604800.0 s	47.1 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
/sites/default/files/js/js_7b0hq7-t7jQvo27Hspv-udNd8FXxVE...	604800.0 s	41.5 KiB
www.osha.gov/themes/contrib/ddp_dol_theme/img/DOL-MasterLogo_BLUE.svg	604800.0 s	41.4 KiB
www.osha.gov/themes/contrib/ddp_dol_theme/img/Agency_DOL_Logo_dark.svg	604800.0 s	24.1 KiB
/themes/contrib/ddp_dol_theme/build/fonts/source-sans-pro...	604800.0 s	20.5 KiB
/themes/contrib/ddp_dol_theme/build/fonts/source-sans-pro...	604800.0 s	20.4 KiB
/sites/default/files/css/css_C8ngkdeOQ91SKaAyhEvReiyUNBFe...	604800.0 s	7.7 KiB
/modules/contrib/ckeditor_accordion/js/accordion.frontend...	604800.0 s	4.5 KiB
/sites/default/files/js/js_18VPz1qKxGN6bMoFYukzUr1j3WJtUm...	604800.0 s	1.8 KiB
www.osha.gov/themes/contrib/ddp_dol_theme/build/img/icon-dot-gov.svg	604800.0 s	1.2 KiB
www.osha.gov/themes/contrib/ddp_dol_theme/build/img/icon-https.svg	604800.0 s	1.2 KiB
/sites/default/files/js/js_rnXnVRCjGNUAOaHxTxAiWk_V2uRLAM...	604800.0 s	1.2 KiB
www.osha.gov/themes/contrib/ddp_dol_theme/build/img/usa-icons/expand_more.svg	604800.0 s	656 B
www.osha.gov/themes/contrib/ddp_dol_theme/build/img/us_flag_small.png	604800.0 s	647 B

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:78.471 source:map[column:1076 line:17 type:source-location url:https://www.osha.gov/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OEpwI9paccWIkfI.js?scope=footer&delta=2&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd urlProvider:network]] map[reflowTime:0.861 source:map[column:151152 line:18 type:source-location url:https://www.osha.gov/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OEpwI9paccWIkfI.js?scope=footer&delta=2&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd urlProvider:network]] map[reflowTime:0.06 source:map[column:112280 line:18 type:source-location url:https://www.osha.gov/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OEpwI9paccWIkfI.js?scope=footer&delta=2&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd urlProvider:network]] map[reflowTime:0.057 source:map[column:118438 line:18 type:source-location url:https://www.osha.gov/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OEpwI9paccWIkfI.js?scope=footer&delta=2&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd 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.

	URL	Resource Size	Est Savings
Stand Down Public Resource `div#teasers > a.teaser-link > div.img-container > img`	www.osha.gov/sites/default/files/homepage/public-resource-box-stand-down.png	1.0 MiB	1.0 MiB
Workers Memorial: Honoring our injured and fallen workers `section.col-xs-12 > div#homepage > div#hero > div#hero-image-container`	www.osha.gov/sites/default/files/homepage/WM-hero.png	667.8 KiB	505.0 KiB
OSHA & CareerSafe: Protecting Young Workers Together - Video Thumbnail `div.col-md-6 > div#teasers > div#video-thumbnail > img`	www.osha.gov/sites/default/files/homepage/Career_Safe_teaser.png	433.5 KiB	421.3 KiB
Join our Team `div.field--item > div.take-action > a > img.hiring`	www.osha.gov/sites/default/files/OSHA-is-Hiring_HOMEPAGE.png	129.1 KiB	123.9 KiB
Safety Champions Program `div#teasers > a.teaser-link > div.img-container > img`	www.osha.gov/sites/default/files/homepage/SC_Logo2.png	79.3 KiB	68.6 KiB
Celebrating the American Worker `div#teasers > a.teaser-link > div.img-container > img`	/sites/default/files/homepage/Freedom250Logo-RGB-FullColo...	46.6 KiB	40.3 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-1-DIV

nodeLabel: Workers Memorial: Honoring our injured and fallen workers

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

selector: section.col-xs-12 > div#homepage > div#hero > div#hero-image-container

snippet: <div id="hero-image-container" style="background-image: url("/sites/default/files/homepage/WM-hero.png");">

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

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.

URL	Transfer Size	Duration
/sites/default/files/css/css_CqWlq2Olkr9xvaq7qmYVbR6-R3nO...	1.0 MiB	6.2 s
/sites/default/files/css/css_VHFSSqtIg7OyP4OWp19i0KN5Bdeo...	1.1 MiB	7.2 s
fonts.googleapis.com/css?family=Roboto	1.6 KiB
fonts.googleapis.com/css?family=Merriweather	710 B	779 ms
fonts.googleapis.com/css?family=Source+Sans+Pro	1.1 KiB	152 ms
cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css	25.0 KiB	1.5 s
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/brands.min.css	4.6 KiB	946 ms
maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css	6.4 KiB	935 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/fontawesome.min.css	14.9 KiB	1.3 s
/sites/default/files/css/css_C8ngkdeOQ91SKaAyhEvReiyUNBFe...	7.7 KiB
fonts.googleapis.com/css?family=Merriweather:400,700\|Source+Sans+Pro:400,700	989 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.

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.

URL	Est Savings
/themes/contrib/ddp_dol_theme/build/fonts/source-sans-pro...	20 ms
/themes/contrib/ddp_dol_theme/build/fonts/source-sans-pro...	20 ms
/font-awesome/4.4.0/fonts/fontawesome-webfont.woff2?v=4.4.0	15 ms
/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj...	10 ms
/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu...	5.0 ms
/s/merriweather/v33/u-4e0qyriQwlOrhSvowK_l5UcA6zuSYEqOzpP...	5.0 ms

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

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: 755 ms

URL	Time Spent
osha.gov/	755 ms
www.osha.gov/	0.0 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.

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: 10.5 s 2.1 MiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_VHFSSqtIg7OyP4OWp19i0KN5Bdeo...	1.0 MiB	1.0 MiB
/sites/default/files/css/css_CqWlq2Olkr9xvaq7qmYVbR6-R3nO...	1.0 MiB	1.0 MiB
cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css	24.7 KiB	24.0 KiB
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/fontawesome.min.css	14.3 KiB	14.2 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.9 s 405.9 KiB

URL	Transfer Size	Est Savings
/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OE...	186.1 KiB	127.2 KiB
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy...	118.2 KiB	93.6 KiB
www.googletagmanager.com/gtag/js?id=G-THXLXTHVBH&cx=c&gtm=4e64h1	159.7 KiB	65.8 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.1 KiB	58.9 KiB
/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-...	92.2 KiB	40.2 KiB
/sites/default/files/js/js_7b0hq7-t7jQvo27Hspv-udNd8FXxVE...	40.9 KiB	20.2 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.osha.gov/	701 ms	20 ms	4.1 ms
/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OE...	441 ms	58 ms	23 ms
Unattributable	426 ms	9.5 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	365 ms	264 ms	88 ms
www.googletagmanager.com/gtag/js?id=G-THXLXTHVBH&cx=c&gtm=4e64h1	304 ms	243 ms	59 ms
/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-...	283 ms	197 ms	11 ms
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy...	237 ms	169 ms	52 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	117 ms	112 ms	2.4 ms
/sites/default/files/css/css_CqWlq2Olkr9xvaq7qmYVbR6-R3nO...	105 ms	0.0 ms	0.0 ms
/sites/default/files/css/css_VHFSSqtIg7OyP4OWp19i0KN5Bdeo...	102 ms	0.0 ms	0.0 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.

Category	Time Spent
Script Evaluation	1.2 s
Other	854 ms
Style & Layout	555 ms
Script Parsing & Compilation	279 ms
Parse HTML & CSS	264 ms
Rendering	165 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/sites/default/files/css/css_VHFSSqtIg7OyP4OWp19i0KN5Bdeo...	1.1 MiB
www.osha.gov/sites/default/files/homepage/public-resource-box-stand-down.png	1.1 MiB
/sites/default/files/css/css_CqWlq2Olkr9xvaq7qmYVbR6-R3nO...	1.0 MiB
www.osha.gov/sites/default/files/homepage/WM-hero.png	669.0 KiB
www.osha.gov/sites/default/files/homepage/Career_Safe_teaser.png	434.5 KiB
/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OE...	186.8 KiB
www.googletagmanager.com/gtag/js?id=G-THXLXTHVBH&cx=c&gtm=4e64h1	159.8 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.5 KiB
www.osha.gov/sites/default/files/OSHA-is-Hiring_HOMEPAGE.png	129.7 KiB
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy...	118.7 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
OSHA & CareerSafe: Protecting Young Workers Together - Video Thumbnail `div.col-md-6 > div#teasers > div#video-thumbnail > img`	www.osha.gov/sites/default/files/homepage/Career_Safe_teaser.png
Join our Team `div.field--item > div.take-action > a > img.hiring`	www.osha.gov/sites/default/files/OSHA-is-Hiring_HOMEPAGE.png
U.S. flag `header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag`	www.osha.gov/themes/contrib/ddp_dol_theme/build/img/us_flag_small.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 20 user timings

●Avoid long main-thread tasks 12 long tasks found

●Avoid non-composited animations 1 animated element found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

●Avoid large layout shifts 1 layout shift found

○INP breakdown

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.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
José Antonio Vasco, 68 Deborah A. Schmitt, 57 Steven Matthew Jason II, 41 Benja… `div#remembering-workers > div.well > div.col-sm-8 > ul.fatalities-scroller`

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
José Antonio Vasco, 68 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Deborah A. Schmitt, 57 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Steven Matthew Jason II, 41 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Benjamin Lionel Bonura, 26 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Derek Marcus Burpo, 51 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Daniel Jeremy Carrasco, 35 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Miguel Angel Antich, 70 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Kory L. McDonald , 22 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Harland E. Woodward Jr., 58 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
P.J. Kerce, Jr., 84 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
José Antonio Vasco, 68 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Deborah A. Schmitt, 57 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Steven Matthew Jason II, 41 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Benjamin Lionel Bonura, 26 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Derek Marcus Burpo, 51 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Daniel Jeremy Carrasco, 35 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Miguel Angel Antich, 70 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Kory L. McDonald , 22 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
Harland E. Woodward Jr., 58 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`
P.J. Kerce, Jr., 84 `ul.fatalities-scroller > div.js-marquee-wrapper > div.js-marquee > li`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

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
1-800-321-6742 `div.field > div.address > p.address-block > a`
www.osha.gov `div.field > div.address > p.address-block > a`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

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

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with 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

○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.

○Uses ARIA roles only on compatible elements

○Elements with visible text labels have matching accessible names.

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

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

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.

	URL	Displayed size	Actual size	Expected size
U.S. flag `header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag`	www.osha.gov/themes/contrib/ddp_dol_theme/build/img/us_flag_small.png	20 x 13	16 x 11	30 x 20

General

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.

Source	Description
www.osha.gov/	`The Content Security Policy directive 'report-uri' specifies as endpoint 'http://www.osha.gov/report-uri/enforce'. This endpoint will be ignored since it violates the policy for Mixed Content.`
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy... line 514, col 96	`The Content Security Policy directive 'report-uri' specifies as endpoint 'http://www.osha.gov/report-uri/enforce'. This endpoint will be ignored since it violates the policy for Mixed Content.`
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy... line 514, col 96	`The Content Security Policy directive 'report-uri' specifies as endpoint 'http://www.osha.gov/report-uri/enforce'. This endpoint will be ignored since it violates the policy for Mixed Content.`
/_/translate_http/_/js/k=translate_http.tr.en_US.VRmZKspy... line 422, col 354	`The Content Security Policy directive 'report-uri' specifies as endpoint 'http://www.osha.gov/report-uri/enforce'. This endpoint will be ignored since it violates the policy for Mixed Content.`
/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-... line 2, col 28759	TypeError: Cannot read properties of undefined (reading 'addEventListener') at HTMLDocument.<anonymous> (https://www.osha.gov/sites/default/files/js/js_rxzBJLnQagbBgkRS7C9ebxoMYkv9OEpwI9paccWIkfI.js?scope=footer&delta=2&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd:2:10971) at e (https://www.osha.gov/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-vKV0CrtmvkgPc.js?scope=footer&delta=0&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd:3:27028) at t (https://www.osha.gov/sites/default/files/js/js_N5uaCXC7dq6cXNidVU_JTP3hTSqCP-vKV0CrtmvkgPc.js?scope=footer&delta=0&language=en&theme=osha&include=eJxtjlkOwjAMRC_Ukotwh8jEJrHqxpHtIrg9YRFf_M3ypJmyEXKoZShFDVl7-qnT1bQHdVwQR0aVHI12SlX0ArJ6PIR7XWaRLqrhYTDWgv2d_IGc0Ra6xwy2hHYMkNPXLuoNUjk8dH_rPD9QbrrTgEqJehX2lskH9NcRrVXoH3mFAOFg8uzFVITsgzWSQZb2SZ_nYkY2KsE38ifgT2Zd:3:27330)

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

●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

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid