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
medlineplus.gov/css/img/mplus-sprite.png	0.0 ms	40.9 KiB
medlineplus.gov/images/featured/HealthySleep_share2_featured.jpg	0.0 ms	38.1 KiB
medlineplus.gov/jslib/jquery-3.6.0.min.js	0.0 ms	31.9 KiB
medlineplus.gov/uswds/js/uswds.min.js	0.0 ms	26.9 KiB
medlineplus.gov/uswds/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2	0.0 ms	21.8 KiB
medlineplus.gov/uswds/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2	0.0 ms	21.6 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
medlineplus.gov/css/common_new.css?1768476554427	0.0 ms	14.7 KiB
medlineplus.gov/css/jquery-ui/jquery-ui.css	0.0 ms	10.1 KiB
/Universal-Federated-Analytics-Min.js?agency=HHS&subagenc...	0.0 ms	9.4 KiB
medlineplus.gov/jslib/mplus-frontend-controls-new.js	0.0 ms	8.8 KiB
medlineplus.gov/images/m_logo_primary.png	0.0 ms	8.2 KiB
www.nlm.nih.gov/core/nlm-autocomplete/1.1/nlm-autocomplete.js	0.0 ms	6.3 KiB
medlineplus.gov/uswds/css/uswds_styles.css	0.0 ms	5.4 KiB
medlineplus.gov/css/img/home-icons/home-icon-ds.png	0.0 ms	5.2 KiB
medlineplus.gov/jslib/mplus-share.js?id=1112022	0.0 ms	5.1 KiB
medlineplus.gov/css/img/home-icons/home-icon-r.png	0.0 ms	4.9 KiB
medlineplus.gov/css/img/home-icons/home-icon-g.png	0.0 ms	4.9 KiB
medlineplus.gov/css/img/home-icons/home-ft-icon-ct.png	0.0 ms	4.6 KiB
medlineplus.gov/css/img/home-icons/home-icon-ht.png	0.0 ms	4.6 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
medlineplus.gov/jslib/control.js	0.0 ms	4.3 KiB
medlineplus.gov/css/img/home-icons/home-ft-icon-mz.png	0.0 ms	4.3 KiB
medlineplus.gov/css/img/home-icons/home-icon-e.png	0.0 ms	4.2 KiB
medlineplus.gov/css/img/home-icons/home-icon-mt.png	0.0 ms	4.0 KiB
medlineplus.gov/css/homepage_new.css	0.0 ms	4.0 KiB
/WRSiteInterceptEngine/?Q_ZID=ZN_0MtvfxoKez0EItv&Q_LOC=ht...	3600.0 s	4.6 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...	604800.0 s	35.9 KiB
medlineplus.gov/images/nihlogo.png	0.0 ms	3.1 KiB
medlineplus.gov/images/return-top.png	0.0 ms	2.7 KiB
script.crazyegg.com/pages/scripts/0027/2050.js	300.0 s	2.7 KiB
medlineplus.gov/uswds/img/icon-dot-gov.svg	0.0 ms	2.4 KiB
medlineplus.gov/images/feed.png	0.0 ms	2.4 KiB
medlineplus.gov/uswds/img/icon-https.svg	0.0 ms	2.3 KiB
medlineplus.gov/uswds/img/us_flag_small.png	0.0 ms	2.2 KiB
medlineplus.gov/uswds/js/uswds-init.min.js	0.0 ms	2.0 KiB
/dxjsmodule/37.7ea1ffe71ad8c0799cc1.chunk.js?Q_CLIENTVERS...	604800.0 s	18.6 KiB
medlineplus.gov/uswds/img/usa-icons/expand_more.svg	0.0 ms	1.8 KiB
www.nlm.nih.gov/core/nlm-notifyExternal/1.0/nlm-notifyExternal.js	0.0 ms	1.1 KiB
www.google-analytics.com/plugins/ua/linkid.js	3600.0 s	995 B
www.nlm.nih.gov/coop_all_uswds.js?_=1776799491477	0.0 ms	524 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:57.612 source:map[column:15904 line:84 type:source-location url:https://medlineplus.gov/uswds/js/uswds.min.js urlProvider:network]] map[reflowTime:0.093 source:map[column:12430 line:72 type:source-location url:https://medlineplus.gov/uswds/js/uswds.min.js urlProvider:network]] map[reflowTime:0.109 source:map[column:4052 line:72 type:source-location url:https://medlineplus.gov/uswds/js/uswds.min.js urlProvider:network]]]

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: Healthy Sleep

path: 1,HTML,1,BODY,4,DIV,1,DIV,0,DIV,0,ARTICLE,2,DIV,1,DIV,0,A,0,IMG

selector: div.featured > div.featured-image > a > img#feature-img

snippet: <img id="feature-img" src="https://medlineplus.gov/images/featured/HealthySleep_share2_featured.jpg" alt="Healthy Sleep">

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
medlineplus.gov/css/homepage_new.css	4.0 KiB
medlineplus.gov/css/common_new.css?1768476554427	14.7 KiB
medlineplus.gov/uswds/js/uswds-init.min.js	2.0 KiB
medlineplus.gov/uswds/css/uswds_styles.css	5.4 KiB	151 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.

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
medlineplus.gov/uswds/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2	5.0 ms
medlineplus.gov/uswds/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2	5.0 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
Healthy Sleep `div.featured > div.featured-image > a > img#feature-img`	medlineplus.gov/images/featured/HealthySleep_share2_featured.jpg	36.4 KiB	27.7 KiB

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

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 11.3 KiB

URL	Transfer Size	Est Savings
medlineplus.gov/css/common_new.css?1768476554427	13.0 KiB	11.3 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: 2.1 s 379.1 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.1 KiB	106.0 KiB
www.googletagmanager.com/gtag/js?id=G-7147EPK006&cx=c&gtm=4e64h1	161.2 KiB	65.2 KiB
www.googletagmanager.com/gtag/js?id=G-P1FPTH9PL4&cx=c&gtm=4e64h1	156.5 KiB	63.2 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.1 KiB	62.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-MMVM77	145.7 KiB	57.2 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...	35.7 KiB	25.1 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.googletagmanager.com/gtm.js?id=GTM-MMVM77	557 ms	432 ms	93 ms
www.googletagmanager.com/gtag/js?id=G-7147EPK006&cx=c&gtm=4e64h1	542 ms	447 ms	93 ms
medlineplus.gov/jslib/jquery-3.6.0.min.js	494 ms	317 ms	122 ms
www.googletagmanager.com/gtag/js?id=G-P1FPTH9PL4&cx=c&gtm=4e64h1	480 ms	400 ms	78 ms
Unattributable	465 ms	11 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	398 ms	320 ms	75 ms
medlineplus.gov/uswds/js/uswds.min.js	321 ms	62 ms	21 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	220 ms	159 ms	3.0 ms
/dxjsmodule/37.7ea1ffe71ad8c0799cc1.chunk.js?Q_CLIENTVERS...	152 ms	138 ms	10 ms
www.google-analytics.com/analytics.js	132 ms	99 ms	16 ms
medlineplus.gov/	130 ms	24 ms	5.8 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	112 ms	40 ms	72 ms
/Universal-Federated-Analytics-Min.js?agency=HHS&subagenc...	111 ms	87 ms	5.3 ms
medlineplus.gov/jslib/mplus-frontend-controls-new.js	55 ms	36 ms	18 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	2.7 s
Script Parsing & Compilation	656 ms
Other	644 ms
Style & Layout	262 ms
Parse HTML & CSS	86 ms
Garbage Collection	55 ms
Rendering	26 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 6.0 KiB

URL	Transfer Size	Est Savings
www.nlm.nih.gov/core/nlm-autocomplete/1.1/nlm-autocomplete.js	5.8 KiB	3.3 KiB
medlineplus.gov/jslib/mplus-frontend-controls-new.js	7.2 KiB	2.6 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
Healthy Sleep `div.featured > div.featured-image > a > img#feature-img`	medlineplus.gov/images/featured/HealthySleep_share2_featured.jpg
header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag `header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag`	medlineplus.gov/uswds/img/us_flag_small.png
RSS `ul.follow-footer > li > a.follow-item > img.social-media-toolkit-icon`	medlineplus.gov/images/feed.png
National Institutes of Health `div#mplus-header > div#mplus-orgs > a.nih-org > img.nihlogo`	medlineplus.gov/images/nihlogo.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

●Avoids enormous network payloads Total size was 1,264 KiB

●User Timing marks and measures 19 user timings

●Avoid long main-thread tasks 17 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 0 ms

○INP breakdown

○Avoid non-composited animations

○Avoid large layout shifts

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.

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
About MedlinePlus `div.footer1 > ul.secondarynav > li > a`
What's New `div.footer1 > ul.secondarynav > li > a`
Site Map `div.footer1 > ul.secondarynav > li > a`
Customer Support `div.footer1 > ul.secondarynav > li > a`
NLM Web Policies `div.footer2 > ul > li > a`
Copyright `div.footer2 > ul > li > a`
Accessibility `div.footer2 > ul > li > a`
Guidelines for Links `div.footer2 > ul > li > a`
Viewers & Players `div.footer2 > ul > li > a`
HHS Vulnerability Disclosure `div.footer2 > ul > li > a`
MedlinePlus Connect for EHRs `div.footer2 > ul > li > a`
For Developers `div.footer2 > ul > li > a`
U.S. Department of Health and Human Services `div#mplus-footer > div.footer2 > div.address > a`
National Institutes of Health `div#mplus-footer > div.footer2 > div.address > a`
FOIA `div#mplus-footer > div.footer2 > div.address > a`
USA.gov `div#mplus-footer > div.footer2 > div.address > a`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html#home `html#home`

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

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

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

●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

●Heading elements appear in a sequentially-descending order

●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

○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

○Links are distinguishable without relying on color.

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○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 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
National Institutes of Health `div#mplus-header > div#mplus-orgs > a.nih-org > img.nihlogo`	medlineplus.gov/images/nihlogo.png	24 x 15	24 x 15	36 x 23

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.googletagmanager.com/gtag/js?id=G-7147EPK006&cx=c&gtm=4e64h1 line 266, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-7147EPK006&gtm=45je64h1v886486751z872197367za20gzb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266400~117512543~118463262&sid=1776799492&sct=1&seg=0&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&en=page_view&_fv=1&_ss=1&ep.page_hostname=medlineplus.gov&ep.gtm_container_version_number=199&ep.content_group=Other&ep.page_id=home&ep.page_location_clean=https%3A%2F%2Fmedlineplus.gov%2F&tfd=1138' violates the following Content Security Policy directive: "connect-src 'self' https://medlineplus.gov www.google-analytics.com stats.g.doubleclick.net .crazyegg.com .qualtrics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L line 203, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64h1v9131934939za200zb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~117512543&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&dr=&sid=1776799492&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&ep.agency=HHS&ep.subagency=NIH&ep.site_topic=unspecified%3Amedlineplus.gov&ep.site_platform=unspecified%3Amedlineplus.gov&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=no&ep.hostname_dimension=medlineplus.gov&tfd=1395' violates the following Content Security Policy directive: "connect-src 'self' https://medlineplus.gov www.google-analytics.com stats.g.doubleclick.net .crazyegg.com .qualtrics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-P1FPTH9PL4&cx=c&gtm=4e64h1 line 258, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-P1FPTH9PL4&gtm=45je64h1v888853737z872197367za20gzb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=7&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938469~117266400~117512543&sid=1776799492&sct=1&seg=0&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&en=page_view&_fv=1&_ss=1&ep.page_hostname=medlineplus.gov&ep.gtm_container_version_number=199&ep.content_group=Other&ep.page_id=home&ep.page_location_clean=https%3A%2F%2Fmedlineplus.gov%2F&tfd=1268' violates the following Content Security Policy directive: "connect-src 'self' https://medlineplus.gov www.google-analytics.com stats.g.doubleclick.net .crazyegg.com .qualtrics.com". The action has been blocked.
nlmoccs.report-uri.com/r/d/csp/reportOnly	`Failed to load resource: the server responded with a status of 429 ()`
nlmoccs.report-uri.com/r/d/csp/reportOnly	`Failed to load resource: the server responded with a status of 429 ()`
nlmoccs.report-uri.com/r/d/csp/reportOnly	`Failed to load resource: the server responded with a status of 429 ()`
www.googletagmanager.com/gtag/js?id=G-7147EPK006&cx=c&gtm=4e64h1 line 266, col 390	Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-7147EPK006&gtm=45je64h1v886486751z872197367za20gzb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266400~117512543~118463262&sid=1776799492&sct=1&seg=0&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&en=page_view&_fv=1&_ss=1&ep.page_hostname=medlineplus.gov&ep.gtm_container_version_number=199&ep.content_group=Other&ep.page_id=home&ep.page_location_clean=https%3A%2F%2Fmedlineplus.gov%2F&tfd=1138. Refused to connect because it violates the document's Content Security Policy.
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L line 203, col 390	Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64h1v9131934939za200zb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~117512543&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&dr=&sid=1776799492&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&ep.agency=HHS&ep.subagency=NIH&ep.site_topic=unspecified%3Amedlineplus.gov&ep.site_platform=unspecified%3Amedlineplus.gov&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=no&ep.hostname_dimension=medlineplus.gov&tfd=1395. Refused to connect because it violates the document's Content Security Policy.
www.googletagmanager.com/gtag/js?id=G-P1FPTH9PL4&cx=c&gtm=4e64h1 line 258, col 390	Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-P1FPTH9PL4&gtm=45je64h1v888853737z872197367za20gzb72197367zd72197367&_p=1776799491424&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=27302469.1776799492&frm=0&pscdl=noapi&rcb=7&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938469~117266400~117512543&sid=1776799492&sct=1&seg=0&dl=https%3A%2F%2Fmedlineplus.gov%2F&dt=MedlinePlus%20-%20Health%20Information%20from%20the%20National%20Library%20of%20Medicine&en=page_view&_fv=1&_ss=1&ep.page_hostname=medlineplus.gov&ep.gtm_container_version_number=199&ep.content_group=Other&ep.page_id=home&ep.page_location_clean=https%3A%2F%2Fmedlineplus.gov%2F&tfd=1268. Refused to connect because it violates the document's Content Security Policy.

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

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
medlineplus.gov/healthysleep.html	Learn more

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

●Document has a meta description

●Page has successful HTTP status code

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`