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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

27

Performance

Insights

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

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:87.041 source:map[column:33734 line:9 type:source-location url:https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js urlProvider:network]] map[reflowTime:0.482 source:map[column:13363 line:9 type:source-location url:https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js urlProvider:network]] map[reflowTime:0.294 source:map[column:12623 line:9 type:source-location url:https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js urlProvider:network]] map[reflowTime:0.607 source:map[column:16743 line:9 type:source-location url:https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js urlProvider:network]] map[reflowTime:42.566 source:map[column:1076 line:35 type:source-location url:https://www.dol.gov/sites/dolgov/files/js/js_hOgZYhDNHONKokyrIt9NdLTkhCx1TbUMyuRTNqTLei0.js?scope=footer&delta=7&language=en&theme=opa_theme&include=eJyNkmFuwyAMhS8EibQLRQZcggo2AmdtdvqRrmlRN6X79_D7MOaB5YKj5ZSZkKQOjuM0Y8xYtJa5IGrLcUmkK1oJTMq-bOAMk8yYUGuwzXRvIAvFHfnZnY7sGhxqgs_WJ0ZeRBu-_ocPHt6NXyXY89rBOiEtRzsuUFtIoeotsdMSD1k0eN2mRnJQlC3wtaL34y6Uc3na0r_xo49sILaZ1hiomY9nGZ_yVk0QSJCALE4GiO7E77JCU2Fv0mmFV2lnnEdXlgxxuC_ViUnggpXbNJ0e6qc_8oY6h6S8pP0oA_PtXj8lcFimakvI0kNbUH9DIYLZqU6rR7SjYZYqBXJXe4nvaaQlSmtDfgGPur0zXmDt_IqxffSPb3GzM0M urlProvider:network]] map[reflowTime:6.53 source:map[column:151152 line:36 type:source-location url:https://www.dol.gov/sites/dolgov/files/js/js_hOgZYhDNHONKokyrIt9NdLTkhCx1TbUMyuRTNqTLei0.js?scope=footer&delta=7&language=en&theme=opa_theme&include=eJyNkmFuwyAMhS8EibQLRQZcggo2AmdtdvqRrmlRN6X79_D7MOaB5YKj5ZSZkKQOjuM0Y8xYtJa5IGrLcUmkK1oJTMq-bOAMk8yYUGuwzXRvIAvFHfnZnY7sGhxqgs_WJ0ZeRBu-_ocPHt6NXyXY89rBOiEtRzsuUFtIoeotsdMSD1k0eN2mRnJQlC3wtaL34y6Uc3na0r_xo49sILaZ1hiomY9nGZ_yVk0QSJCALE4GiO7E77JCU2Fv0mmFV2lnnEdXlgxxuC_ViUnggpXbNJ0e6qc_8oY6h6S8pP0oA_PtXj8lcFimakvI0kNbUH9DIYLZqU6rR7SjYZYqBXJXe4nvaaQlSmtDfgGPur0zXmDt_IqxffSPb3GzM0M urlProvider:network]] map[reflowTime:0.101 source:map[column:112280 line:36 type:source-location url:https://www.dol.gov/sites/dolgov/files/js/js_hOgZYhDNHONKokyrIt9NdLTkhCx1TbUMyuRTNqTLei0.js?scope=footer&delta=7&language=en&theme=opa_theme&include=eJyNkmFuwyAMhS8EibQLRQZcggo2AmdtdvqRrmlRN6X79_D7MOaB5YKj5ZSZkKQOjuM0Y8xYtJa5IGrLcUmkK1oJTMq-bOAMk8yYUGuwzXRvIAvFHfnZnY7sGhxqgs_WJ0ZeRBu-_ocPHt6NXyXY89rBOiEtRzsuUFtIoeotsdMSD1k0eN2mRnJQlC3wtaL34y6Uc3na0r_xo49sILaZ1hiomY9nGZ_yVk0QSJCALE4GiO7E77JCU2Fv0mmFV2lnnEdXlgxxuC_ViUnggpXbNJ0e6qc_8oY6h6S8pP0oA_PtXj8lcFimakvI0kNbUH9DIYLZqU6rR7SjYZYqBXJXe4nvaaQlSmtDfgGPur0zXmDt_IqxffSPb3GzM0M urlProvider:network]] map[reflowTime:0.097 source:map[column:118438 line:36 type:source-location url:https://www.dol.gov/sites/dolgov/files/js/js_hOgZYhDNHONKokyrIt9NdLTkhCx1TbUMyuRTNqTLei0.js?scope=footer&delta=7&language=en&theme=opa_theme&include=eJyNkmFuwyAMhS8EibQLRQZcggo2AmdtdvqRrmlRN6X79_D7MOaB5YKj5ZSZkKQOjuM0Y8xYtJa5IGrLcUmkK1oJTMq-bOAMk8yYUGuwzXRvIAvFHfnZnY7sGhxqgs_WJ0ZeRBu-_ocPHt6NXyXY89rBOiEtRzsuUFtIoeotsdMSD1k0eN2mRnJQlC3wtaL34y6Uc3na0r_xo49sILaZ1hiomY9nGZ_yVk0QSJCALE4GiO7E77JCU2Fv0mmFV2lnnEdXlgxxuC_ViUnggpXbNJ0e6qc_8oY6h6S8pP0oA_PtXj8lcFimakvI0kNbUH9DIYLZqU6rR7SjYZYqBXJXe4nvaaQlSmtDfgGPur0zXmDt_IqxffSPb3GzM0M urlProvider:network]] map[reflowTime:0.252 source:map[column:85639 line:2 type:source-location url:https://www.dol.gov/sites/dolgov/files/js/js_wnADtvUr7SL0Ey0x2xlW5X0amqGUIA1ee-fNJfFLgZY.js?scope=footer&delta=0&language=en&theme=opa_theme&include=eJyNkmFuwyAMhS8EibQLRQZcggo2AmdtdvqRrmlRN6X79_D7MOaB5YKj5ZSZkKQOjuM0Y8xYtJa5IGrLcUmkK1oJTMq-bOAMk8yYUGuwzXRvIAvFHfnZnY7sGhxqgs_WJ0ZeRBu-_ocPHt6NXyXY89rBOiEtRzsuUFtIoeotsdMSD1k0eN2mRnJQlC3wtaL34y6Uc3na0r_xo49sILaZ1hiomY9nGZ_yVk0QSJCALE4GiO7E77JCU2Fv0mmFV2lnnEdXlgxxuC_ViUnggpXbNJ0e6qc_8oY6h6S8pP0oA_PtXj8lcFimakvI0kNbUH9DIYLZqU6rR7SjYZYqBXJXe4nvaaQlSmtDfgGPur0zXmDt_IqxffSPb3GzM0M 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
Welcome to the United States Department of Labor Learn more about our work div.pre-content > div#block-pagetitle-2 > div.usa-hero > div.usa-grid
www.dol.gov/sites/dolgov/files/general/images/20250120-DOLSEALSTACK-hero.png744.5 KiB586.3 KiB
Disaster Recovery Assistance div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...274.3 KiB261.1 KiB
opinion letters div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...169.3 KiB156.0 KiB
Explore the new dol.gov beta site div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...143.1 KiB129.9 KiB
Make America AI-Ready div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...88.4 KiB75.2 KiB
national apprentice week April 26-May 2, 2026 div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...71.4 KiB58.2 KiB
America 250 div.single-featured-story > div.featured-story-image > div.field > img
/sites/dolgov/files/styles/featured_image/public/OPA/imag...22.1 KiB8.9 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-0-DIV
nodeLabel: Welcome to the United States Department of Labor Learn more about our work
path: 1,HTML,1,BODY,2,DIV,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV
selector: div.pre-content > div#block-pagetitle-2 > div.usa-hero > div.usa-grid
snippet: <div class="usa-grid" style="background: url(&quot;/sites/dolgov/files/general/images/20250120-DOLSEALSTACK-h…&quot;);">

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.

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: 1.0 s
URLTime Spent
dol.gov/1.0 s
www.dol.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: 2.0 s 262.1 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.googletagmanager.com/gtm.js?id=GTM-5VM7ZD849 ms518 ms320 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L765 ms510 ms252 ms
cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js744 ms147 ms7.9 ms
Unattributable736 ms13 ms0.0 ms
/sites/dolgov/files/js/js_wnADtvUr7SL0Ey0x2xlW5X0amqGUIA1...627 ms477 ms96 ms
www.googletagmanager.com/gtag/js?id=G-988WLCRHJJ&cx=c&gtm=4e64h1522 ms356 ms68 ms
/sites/dolgov/files/js/js_hOgZYhDNHONKokyrIt9NdLTkhCx1TbU...509 ms192 ms115 ms
www.googletagmanager.com/gtag/js?id=G-LTGX1LSENR&cx=c&gtm=4e64h1427 ms338 ms86 ms
www.googletagmanager.com/gtag/js?id=G-HZ8Y6WJF2K&cx=c&gtm=4e64k0h2422 ms319 ms98 ms
www.googletagmanager.com/gtag/js?id=G-8D6G2LK2BW&cx=c&gtm=4e64k0h2419 ms345 ms67 ms
/sites/dolgov/files/css/css_ruLNVNcZqL4uIcynI_aIxcPa3bbiA...324 ms0.2 ms0.0 ms
www.dol.gov/321 ms62 ms4.6 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js314 ms301 ms7.5 ms
www.dol.gov/libraries/fontawesome/js/all.min.js?v=6.4.0300 ms71 ms223 ms
www.googletagmanager.com/gtm.js?id=GTM-KDX77HR282 ms217 ms60 ms
platform.twitter.com/widgets.js272 ms208 ms51 ms
s.go-mpulse.net/boomerang/E68AF-EQ2CX-6PS4U-GPXGV-5A3RP188 ms146 ms37 ms
cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js184 ms90 ms13 ms
www.dol.gov/libraries/fontawesome/js/v4-shims.min.js?v=6.4.0153 ms49 ms4.7 ms
siteimproveanalytics.com/js/siteanalyze_6313124.js106 ms95 ms7.7 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h2103 ms36 ms66 ms
www.google-analytics.com/analytics.js86 ms69 ms9.0 ms
/Universal-Federated-Analytics-Min.js?agency=DOL&subagenc...54 ms46 ms6.7 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation4.7 s
Script Parsing & Compilation1.6 s
Other1.1 s
Style & Layout921 ms
Parse HTML & CSS300 ms
Garbage Collection200 ms
Rendering46 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in a sub frame.Actionable

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 33 user timings
Avoid long main-thread tasks 20 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 90 ms
Server Backend Latencies 200 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 10 ms
INP breakdown
Avoid non-composited animations
Avoid large layout shifts
100

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.

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 are distinguishable without relying on color.
Links have a discernible name
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
No element has a `[tabindex]` value greater than 0
Touch targets have sufficient size and spacing.
Heading elements appear in a sequentially-descending order
Skip links are focusable.
Document has a main landmark.
Deprecated ARIA roles were not used
`[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
ARIA IDs are unique
No form fields have multiple labels
`<frame>` or `<iframe>` elements have a title
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Form elements have associated labels
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`[lang]` attributes have a valid value
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Identical links have the same purpose.
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.
81

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
chrome.loadTimes() is deprecated, instead use standardized API: nextHopProtocol in Navigation Timing 2.
chrome.loadTimes() is deprecated, instead use standardized API: Navigation Timing 2.
chrome.loadTimes() is deprecated, instead use standardized API: Paint Timing.

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.

Uses HTTPS
Avoids third-party cookies
Allows users to paste into input fields
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
No browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Mitigate DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Page has successful HTTP status code
Links have descriptive text
Links are crawlable
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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