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
d3js.org/d3.v6.min.js	14400.0 s	88.0 KiB
/Universal-Federated-Analytics-Min.js?agency=HHS&subagenc...	0.0 ms	9.4 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
static.addtoany.com/menu/page.js	86400.0 s	2.2 KiB

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.659594] map[node:map[boundingRect:map[bottom:2315 height:1424 left:0 right:412 top:892 width:412] lhId:page-12-DIV nodeLabel:What's New More News PRESS RELEASE | March 20: New Review Highlights Evidence … path:1,HTML,1,BODY,4,DIV,2,DIV,0,DIV,2,DIV,0,SECTION,0,DIV,1,DIV,0,DIV,2,DIV selector:div.container-fluid > div.row > div.col-12 > div#hp-row2 snippet:<div id="hp-row2" class="row"> type:node] score:0.659594 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:15 height:12 left:3 right:20 top:3 width:17] lhId:page-13-IMG nodeLabel:U.S. flag path:1,HTML,1,BODY,4,DIV,1,DIV,0,DIV,0,HEADER,0,DIV,0,DIV,0,IMG selector:header.usa-banner__header > div.row > div.col-lg-auto > img.usa-banner__header-flag snippet:<img class="usa-banner__header-flag" src="/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/images/theme_core/…" alt="U.S. flag"> type:node]]] type:subitems]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

items: [map[reflowTime:72.122 source:map[type:text value:[unattributed]]]]

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
X `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	100.6 KiB	100.5 KiB
Physicians are in the meeting `div.slide > div.image-wrapper > a.skip-external > img`	www.ahrq.gov/sites/default/files/features/PS_Quality_Improvement_Card.jpg	77.6 KiB	61.0 KiB
Main Navigation Menu `div.col-md-12 > div#mm-mob > div.mm-mob-icon-bgc > img.logo-white`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	24.6 KiB	24.6 KiB
Practice Improvement icon of a doctor with a stethoscope `div.feature > div.feature-image > a.skip-external > img`	www.ahrq.gov/sites/default/files/features/core_competency_icon_improvement.jpg	19.9 KiB	19.0 KiB
Data & Analytics icon of chart `div.feature > div.feature-image > a.skip-external > img`	www.ahrq.gov/sites/default/files/features/core_competency_icon_analytics_0.jpg	19.6 KiB	18.7 KiB
You Tube `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	14.9 KiB	14.9 KiB
LinkedIn `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	11.6 KiB	11.5 KiB
AHRQ: Agency for Healthcare Research and Quality `div.col-md-12 > div.logo-ahrq > a.skip-external > img`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	13.2 KiB	8.1 KiB
Facebook `div.col-md-12 > div.f1-div-width > a.skip-external > img`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	7.8 KiB	7.7 KiB
AHRQ Genius - icon `div.quizzes-cards-wrapper > div.quiz-card > a.skip-external > img`	www.ahrq.gov/sites/default/files/inline-images/AHRQ-o-phile.png	25.4 KiB	6.0 KiB
Quality Improvement Guru - icon `div.quizzes-cards-wrapper > div.quiz-card > a.skip-external > img`	www.ahrq.gov/sites/default/files/inline-images/Quality-Improvement-Guru.png	23.1 KiB	5.4 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-11-IMG

nodeLabel: AHRQ's Mission and Priorities

path: 1,HTML,1,BODY,4,DIV,2,DIV,0,DIV,2,DIV,0,SECTION,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,A,0,PICTURE,3,IMG

selector: div#slide0 > a.slide-img > picture > img.img-responsive

snippet: <img class="img-responsive" src="https://www.ahrq.gov/sites/default/files/styles/slide_phone/public/slides/…" alt="AHRQ's Mission and Priorities" typeof="foaf:Image">

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
unpkg.com/leaflet@1.7.1/dist/leaflet.css	3.6 KiB	828 ms
/Universal-Federated-Analytics-Min.js?agency=HHS&subagenc...	9.4 KiB	794 ms
/sites/default/files/css/css_-Lf44xSgnh2X5EsstgY0S55arm6I...	88.2 KiB	1.1 s
/sites/default/files/css/css_qJHfogkXiiWB8nUjgCU8z8IreMdx...	2.2 KiB	150 ms
/sites/default/files/css/css_F5FDSE50BjKBuP-vfXXXVQyvqjlV...	4.7 KiB

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/custom/ahrq_bootstrap_barrio/pattern-lab/public/u...	15 ms
/themes/custom/ahrq_bootstrap_barrio/pattern-lab/public/u...	15 ms
/themes/custom/ahrq_bootstrap_barrio/pattern-lab/public/u...	15 ms
/themes/custom/ahrq_bootstrap_barrio/pattern-lab/public/u...	10 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.0 s

URL	Time Spent
ahrq.gov/	1.0 s
www.ahrq.gov/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
What's New More News PRESS RELEASE \| March 20: New Review Highlights Evidence … `div.container-fluid > div.row > div.col-12 > div#hp-row2`	0.660

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: 450 ms 83.4 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_-Lf44xSgnh2X5EsstgY0S55arm6I...	87.3 KiB	83.4 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: 1.6 s 352.6 KiB

URL	Transfer Size	Est Savings
d3js.org/d3.v6.min.js	87.4 KiB	71.9 KiB
www.googletagmanager.com/gtag/js?id=GTM-W4NX5V	136.4 KiB	70.0 KiB
www.googletagmanager.com/gtag/js?id=G-1NPT56LE7J&cx=c&gtm=4e64k0	157.5 KiB	66.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.0 KiB	59.9 KiB
unpkg.com/leaflet@1.7.1/dist/leaflet.js	40.0 KiB	33.4 KiB
/sites/default/files/js/js_zqN5L6hLqGAH3OYy6FzD1htIlHo5-H...	61.6 KiB	29.5 KiB
static.addtoany.com/menu/modules/core.ydpp7jcu.js	25.8 KiB	21.1 KiB

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 reason	Failure type
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not actionable

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.ahrq.gov/sites/default/files/slides/MEPS_brick.png	900.2 KiB
www.ahrq.gov/sites/default/files/slides/HCUP_brick.png	761.2 KiB
www.ahrq.gov/sites/default/files/slides/about-ahrq-slide.jpg	263.5 KiB
www.ahrq.gov/sites/default/files/slides/hai-mdro-ltc_brick%20pic1.jpg	219.9 KiB
www.googletagmanager.com/gtag/js?id=G-1NPT56LE7J&cx=c&gtm=4e64k0	157.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.4 KiB
www.googletagmanager.com/gtag/js?id=GTM-W4NX5V	136.5 KiB
www.ahrq.gov/sites/default/files/features/HCUP_MEPS.jpg	125.8 KiB
/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	101.5 KiB
/sites/default/files/css/css_-Lf44xSgnh2X5EsstgY0S55arm6I...	88.2 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
X `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
You Tube `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
LinkedIn `div.col-md-12 > div.f1-div-width > a.skip-external > img.img-spacing`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
Facebook `div.col-md-12 > div.f1-div-width > a.skip-external > img`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
AHRQ: Agency for Healthcare Research and Quality `div.col-md-12 > div.logo-ahrq > a.skip-external > img`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
HHS `header.usa-banner__header > div.row > div.col-lg-auto > img.usa-banner__header-flag`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...
U.S. flag `header.usa-banner__header > div.row > div.col-lg-auto > img.usa-banner__header-flag`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...

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

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 14 user timings

●JavaScript execution time 0.9 s

●Minimizes main-thread work 2.0 s

●Avoid long main-thread tasks 10 long tasks found

●Network Requests

●Network Round Trip Times 100 ms

●Server Backend Latencies 20 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 40 ms

○INP breakdown

○Avoid non-composited animations

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.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.clearfix > div.quizzes-cards-wrapper > div.quiz-card > a.skip-external `div.clearfix > div.quizzes-cards-wrapper > div.quiz-card > a.skip-external`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

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

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

●`[role]` values are valid

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●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.

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

●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.

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

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

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

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

○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 use only permitted 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

○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

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

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

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

○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

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
Main Navigation Menu `div.col-md-12 > div#mm-mob > div.mm-mob-icon-bgc > img.logo-white`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	25 x 25 (1.00)	1867 x 2134 (0.87)
Physicians are in the meeting `div.slide > div.image-wrapper > a.skip-external > img`	www.ahrq.gov/sites/default/files/features/PS_Quality_Improvement_Card.jpg	200 x 325 (0.62)	390 x 325 (1.20)

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
AHRQ's Mission and Priorities `div#slide0 > a.slide-img > picture > img.img-responsive`	/sites/default/files/styles/slide_phone/public/slides/abo...	350 x 215	350 x 215	525 x 323
U.S. flag `header.usa-banner__header > div.row > div.col-lg-auto > img.usa-banner__header-flag`	/themes/custom/ahrq_bootstrap_barrio/pattern-lab/source/i...	17 x 12	16 x 11	26 x 18

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.ahrq.gov/sites/default/files/features/core_competency_icon_research_0.jpg	`Failed to load resource: the server responded with a status of 405 ()`

●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

●Page has the HTML doctype

●Properly defines charset

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

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

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.ahrq.gov/whatsnew.html	More
www.ahrq.gov/healthsystemsresearch/index.html	More
www.ahrq.gov/practiceimprovement/index.html	More
www.ahrq.gov/data/index.html	More
www.cdc.gov/flu/	More
health.gov/myhealthfinder	More
www.healthypeople.gov/	More

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

Crawling and Indexing

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.

Line #	Content	Error
66	`Disallow /redirects/`	`Syntax not understood`

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 are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`