Lighthouse Desktop

· 0 checks — Desktop 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
www.uspto.gov/sites/default/files/joi-lead-0326.png	600.0 s	2.1 MiB
www.uspto.gov/libraries/fontawesome/js/all.min.js?v=6.4.2	600.0 s	439.5 KiB
www.uspto.gov/themes/custom/uspto_ds/images/back-sketch.png	600.0 s	176.5 KiB
/sites/default/files/js/js_59308NEp1U_W2hRRrJGk3oUWfx38JG...	600.0 s	106.3 KiB
www.uspto.gov/themes/custom/uspto_ds/css/usptostrap.v3.min.css?tdups2	600.0 s	101.0 KiB
/themes/custom/uspto_ds/icons/material-icons/MaterialIcon...	600.0 s	99.1 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto.theme.min.css?tdups2	600.0 s	56.7 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto-icons.css?tdups2	600.0 s	56.5 KiB
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-SemiBold.woff2	600.0 s	33.0 KiB
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-Regular.woff2	600.0 s	33.0 KiB
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-Bold.woff2	600.0 s	32.8 KiB
www.uspto.gov/core/assets/vendor/jquery/jquery.min.js?v=4.0.0	600.0 s	28.1 KiB
/sites/default/files/styles/medium/public/a250-homepage-b...	600.0 s	25.4 KiB
/sites/default/files/styles/major_landing_feature/public/...	600.0 s	19.7 KiB
/sites/default/files/js/js_LhQdKuG3WfMNECmLgP6ViqUqVGt8Kp...	600.0 s	18.2 KiB
www.uspto.gov/libraries/fontawesome/js/fontawesome.min.js?v=6.4.2	600.0 s	16.2 KiB
/sites/default/files/css/css_n3RYwHt1BwEO_oyDi1gCR5k0uglb...	600.0 s	14.9 KiB
www.uspto.gov/themes/custom/uspto_ds/js/uspto-scripts.js?tdups2	600.0 s	14.6 KiB
/sites/default/files/styles/major_landing_feature/public/...	600.0 s	14.2 KiB
www.uspto.gov/modules/custom/uspto_icon_plugin/js/iconathon.js?tdups2	600.0 s	12.5 KiB
/sites/default/files/styles/major_landing_feature/public/...	600.0 s	12.3 KiB
components.uspto.gov/js/Uni-Fed-Min.js?agency=DOC&subagency=USPTO&yt=true	0.0 ms	9.0 KiB
www.uspto.gov/themes/custom/uspto_ds/images/website-logo-horiz.png	600.0 s	8.3 KiB
www.uspto.gov/themes/custom/uspto_ds/images/uspto-print-logo.png	600.0 s	7.7 KiB
www.uspto.gov/libraries/fontawesome/js/v4-shims.min.js?v=6.4.2	600.0 s	5.4 KiB
/sites/default/files/css/css_z91eArNdVHJUpbFrK_1ZxoMlroy8...	600.0 s	5.0 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
/SIE/?Q_ZID=ZN_38hORMqIGgjilAq	3600.0 s	4.8 KiB
www.uspto.gov/themes/custom/uspto_ds/js/jquery.pajinate.js?tdups2	600.0 s	4.0 KiB
/sites/default/files/js/js_uyBaW_j32SIzOAuifVAGlbsr4_5C-q...	600.0 s	3.6 KiB
www.uspto.gov/themes/custom/uspto_ds/js/uspto-steps-menu.js?tdups2	600.0 s	2.6 KiB
www.uspto.gov/modules/custom/uspto_alerts/js/uspto_alerts.js?tdups2	600.0 s	2.5 KiB
www.uspto.gov/themes/custom/uspto_ds/css/colorbox.css?tdups2	600.0 s	2.4 KiB
www.uspto.gov/themes/custom/uspto_ds/img/icon-dot-gov.svg	600.0 s	1.9 KiB
www.uspto.gov/themes/custom/uspto_ds/img/icon-https.svg	600.0 s	1.8 KiB
www.uspto.gov/modules/custom/uspto_home/js/uspto_home.js?tdups2	600.0 s	1.6 KiB
www.uspto.gov/themes/custom/uspto_ds/js/uspto-section-landing.js?tdups2	600.0 s	1.5 KiB
www.uspto.gov/themes/custom/uspto_ds/js/uspto-glossary.js?tdups2	600.0 s	1.4 KiB
www.uspto.gov/themes/custom/uspto_ds/js/uspto-scroll-to-top.js?tdups2	600.0 s	1.4 KiB
www.uspto.gov/themes/custom/uspto_ds/img/us_flag_small.png	600.0 s	1.3 KiB
www.uspto.gov/themes/custom/uspto_ds/css/supp-min.css?tdups2	600.0 s	1.2 KiB
components.uspto.gov/js/ais/12-www.js	0.0 ms	966 B

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
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-SemiBold.woff2	990 ms
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-Regular.woff2	990 ms
/themes/custom/uspto_ds/icons/material-icons/MaterialIcon...	990 ms
www.uspto.gov/themes/custom/uspto_ds/fonts/public-sans/PublicSans-Bold.woff2	715 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.

	URL	Resource Size	Est Savings
div#block-hero > article.node > div.col-md-8 > img.img-fluid `div#block-hero > article.node > div.col-md-8 > img.img-fluid`	www.uspto.gov/sites/default/files/joi-lead-0326.png	2.1 MiB	2.1 MiB
An official website of the United States government Here’s how you know keyboa… `body.path-frontpage > div.dialog-off-canvas-main-canvas`	www.uspto.gov/themes/custom/uspto_ds/images/back-sketch.png	175.2 KiB	40.7 KiB
The America250 USPTO logo above a red, white and blue ribbon `div.embedded-entity > article.media > div.field > img.image-style-medium`	/sites/default/files/styles/medium/public/a250-homepage-b...	24.2 KiB	10.4 KiB
person’s hands on laptop keyboard with screen displaying check status that has … `a > div.blog-image > div.field > img.image-style-major-landing-feature`	/sites/default/files/styles/major_landing_feature/public/...	18.5 KiB	8.8 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:787.18 label:Time to first byte subpart:timeToFirstByte] map[duration:29.454 label:Resource load delay subpart:resourceLoadDelay] map[duration:1965.878 label:Resource load duration subpart:resourceLoadDuration] map[duration:584.035 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-IMG

nodeLabel: div#block-hero > article.node > div.col-md-8 > img.img-fluid

path: 1,HTML,1,BODY,2,DIV,1,HEADER,3,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,IMG

selector: div#block-hero > article.node > div.col-md-8 > img.img-fluid

snippet: <img src="/sites/default/files/joi-lead-0326.png" alt="" class="img-fluid">

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#block-hero > article.node > div.col-md-8 > img.img-fluid

path: 1,HTML,1,BODY,2,DIV,1,HEADER,3,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,IMG

selector: div#block-hero > article.node > div.col-md-8 > img.img-fluid

snippet: <img src="/sites/default/files/joi-lead-0326.png" alt="" class="img-fluid">

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
www.uspto.gov/themes/custom/uspto_ds/css/supp-min.css?tdups2	1.2 KiB
www.uspto.gov/themes/custom/uspto_ds/css/usptostrap.v3.min.css?tdups2	101.0 KiB	222 ms
/sites/default/files/js/js_uyBaW_j32SIzOAuifVAGlbsr4_5C-q...	3.6 KiB
www.uspto.gov/core/assets/vendor/jquery/jquery.min.js?v=4.0.0	28.1 KiB
www.uspto.gov/themes/custom/uspto_ds/css/colorbox.css?tdups2	2.4 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto-icons.css?tdups2	56.5 KiB
/sites/default/files/css/css_z91eArNdVHJUpbFrK_1ZxoMlroy8...	5.0 KiB
/sites/default/files/css/css_n3RYwHt1BwEO_oyDi1gCR5k0uglb...	14.9 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto.theme.min.css?tdups2	56.7 KiB	444 ms
cdn.jsdelivr.net/npm/js-cookie@3.0.5/dist/js.cookie.min.js	1.6 KiB	210 ms

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.

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: 207 ms

URL	Time Spent
uspto.gov/	207 ms
www.uspto.gov/	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 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: 420 ms 212.3 KiB

URL	Transfer Size	Est Savings
www.uspto.gov/themes/custom/uspto_ds/css/usptostrap.v3.min.css?tdups2	99.9 KiB	90.0 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto-icons.css?tdups2	55.4 KiB	55.4 KiB
www.uspto.gov/themes/custom/uspto_ds/css/uspto.theme.min.css?tdups2	55.6 KiB	53.3 KiB
/sites/default/files/css/css_n3RYwHt1BwEO_oyDi1gCR5k0uglb...	13.7 KiB	13.5 KiB

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 5.3 KiB

URL	Transfer Size	Est Savings
www.uspto.gov/libraries/fontawesome/js/fontawesome.min.js?v=6.4.2	15.0 KiB	5.3 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: 0.0 ms 375.3 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.1 KiB	106.0 KiB
/sites/default/files/js/js_59308NEp1U_W2hRRrJGk3oUWfx38JG...	105.2 KiB	84.1 KiB
www.googletagmanager.com/gtag/js?id=G-CD30TTEK1F&cx=c&gtm=4e64h1	154.8 KiB	63.3 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.1 KiB	62.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-5D5BBD	143.8 KiB	59.5 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.

URL	Transfer Size
www.uspto.gov/sites/default/files/joi-lead-0326.png	2.1 MiB
www.uspto.gov/libraries/fontawesome/js/all.min.js?v=6.4.2	439.5 KiB
www.uspto.gov/themes/custom/uspto_ds/images/back-sketch.png	176.5 KiB
www.googletagmanager.com/gtag/js?id=G-CD30TTEK1F&cx=c&gtm=4e64h1	154.9 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.1 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-5D5BBD	144.1 KiB
/sites/default/files/js/js_59308NEp1U_W2hRRrJGk3oUWfx38JG...	106.3 KiB
www.uspto.gov/themes/custom/uspto_ds/css/usptostrap.v3.min.css?tdups2	101.0 KiB
/themes/custom/uspto_ds/icons/material-icons/MaterialIcon...	99.1 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
div#block-hero > article.node > div.col-md-8 > img.img-fluid `div#block-hero > article.node > div.col-md-8 > img.img-fluid`	www.uspto.gov/sites/default/files/joi-lead-0326.png
The America250 USPTO logo above a red, white and blue ribbon `div.embedded-entity > article.media > div.field > img.image-style-medium`	/sites/default/files/styles/medium/public/a250-homepage-b...
Two spotlights shining across each other displaying the letters “I” and “P” `a > div.blog-image > div.field > img.image-style-major-landing-feature`	/sites/default/files/styles/major_landing_feature/public/...
USPTO Hour is an event series that shares agency priorities, information, and n… `a > div.blog-image > div.field > img.image-style-major-landing-feature`	/sites/default/files/styles/major_landing_feature/public/...
person’s hands on laptop keyboard with screen displaying check status that has … `a > div.blog-image > div.field > img.image-style-major-landing-feature`	/sites/default/files/styles/major_landing_feature/public/...
U.S. flag `div.accordion > div.d-none > div.banner-inner > img.banner-header-flag`	www.uspto.gov/themes/custom/uspto_ds/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

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●User Timing marks and measures 16 user timings

●JavaScript execution time 1.1 s

●Minimizes main-thread work 1.6 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 200 ms

●Server Backend Latencies 530 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 360 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○Avoid non-composited animations

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

●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

●`[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

●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

●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

○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 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

○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.

○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.

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 / Warning	Source
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/.	www.uspto.gov/core/assets/vendor/jquery/jquery.min.js?v=4.0.0 line 1, col 71843

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.

URL	Map URL
www.uspto.gov/libraries/fontawesome/js/all.min.js?v=6.4.2
components.uspto.gov/js/Uni-Fed-Min.js?agency=DOC&subagency=USPTO&yt=true	components.uspto.gov/js/Federated.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 browser errors logged to the console

●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

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
Find It Fast `div.container-lg > div.region > div.input-group > a.btn`

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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`