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
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=HHS&subagency=NIH	0.0 ms	9.4 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
script.crazyegg.com/pages/scripts/0097/2751.js	86400.0 s	230 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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:122.024 source:map[column:13 line:255 type:source-location url:https://www.genome.gov/sites/default/files/js/js_xi0FtGdjW2Z6VR7E4ps29cMkIygxI-vuQpt3k_8ypz4.js?scope=footer&delta=0&language=en&theme=nhgri&include=eJxljkEOgzAMBD8UmidZBkwwcmwUJ1B4fZEKl_a2O1qtBt2pAutCQ7USF3-tzWcYTCtphZ5EbAeeoEelEvBvXimvMPEbFLcwFDwPSik-ISSzJASoKEflweMvCJzXYhuNkJtUBie5viNnDzqnwnG6VHAnt0wPaSLdiok6Fx4vqy9OYj3KXRTVEopQOW5yttJ3kzUdsbLpB2MdYl8 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-DIV

nodeLabel: section#face > div#slider > div.slide > div.slide-bg

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

selector: section#face > div#slider > div.slide > div.slide-bg

snippet: <div class="slide-bg slide-bg-0" fetchpriority="high" data-lazy="">

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
fonts.googleapis.com/css2?family=Open+Sans:wght@400;500;600;700;800&display=swap	2.4 KiB	778 ms
/sites/default/files/css/css_S9fxr0VKT9XswDa4m5Lk9YATdxRc...	81.7 KiB	470 ms
/sites/default/files/css/css_7bNgxpTyyDOGVcNhI8rWh6jpOc1e...	1.9 KiB
/sites/default/files/css/css_Bja-lTOnFQWXVat4QvC77PLgdp_N...	991 B

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
HGP mosaic `div.wrapper > div.tab > div.box > div.img`	/sites/default/files/media/images/2023-08/hgp_specialty_f...	104.8 KiB	80.8 KiB

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: 777 ms

URL	Time Spent
genome.gov/	777 ms
www.genome.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: 630 ms 75.4 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_S9fxr0VKT9XswDa4m5Lk9YATdxRc...	81.4 KiB	75.4 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: 2.1 s 499.5 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.0 KiB	105.9 KiB
code.jquery.com/ui/1.12.1/jquery-ui.js	105.6 KiB	88.8 KiB
/sites/default/files/js/js_wY7SbSc8raFRw1fRnmuVtinauFDQqI...	109.3 KiB	86.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.0 KiB	62.5 KiB
www.genome.gov/sites/default/files/google_analytics/gtag.js?tdw9db	123.2 KiB	61.2 KiB
www.googletagmanager.com/gtag/js?id=G-1GVMC3FXSC&cx=c&gtm=4e64h1	148.4 KiB	60.6 KiB
/sites/default/files/js/js_xi0FtGdjW2Z6VR7E4ps29cMkIygxI-...	454.2 KiB	34.0 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
/sites/default/files/js/js_xi0FtGdjW2Z6VR7E4ps29cMkIygxI-...	1.2 s	342 ms	180 ms
Unattributable	481 ms	93 ms	0.0 ms
www.genome.gov/	332 ms	4.7 ms	1.3 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	291 ms	231 ms	59 ms
www.genome.gov/sites/default/files/google_analytics/gtag.js?tdw9db	237 ms	174 ms	49 ms
www.googletagmanager.com/gtag/js?id=G-1GVMC3FXSC&cx=c&gtm=4e64h1	211 ms	158 ms	52 ms
/sites/default/files/js/js_wY7SbSc8raFRw1fRnmuVtinauFDQqI...	202 ms	85 ms	59 ms
code.jquery.com/ui/1.12.1/jquery-ui.js	131 ms	52 ms	78 ms
/sites/default/files/css/css_S9fxr0VKT9XswDa4m5Lk9YATdxRc...	108 ms	0.0 ms	0.0 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	97 ms	93 ms	2.0 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	83 ms	33 ms	50 ms
www.google-analytics.com/analytics.js	50 ms	43 ms	6.6 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.3 s
Style & Layout	692 ms
Other	608 ms
Script Parsing & Compilation	542 ms
Parse HTML & CSS	136 ms
Rendering	58 ms
Garbage Collection	49 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 38.1 KiB

URL	Transfer Size	Est Savings
code.jquery.com/ui/1.12.1/jquery-ui.js	105.6 KiB	38.1 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.genome.gov/themes/custom/nhgri/assets/images/trans.png	3.0 MiB
/sites/default/files/js/js_xi0FtGdjW2Z6VR7E4ps29cMkIygxI-...	454.5 KiB
www.genome.gov/sites/default/files/media/images/2023-08/gray.webp	184.0 KiB
www.googletagmanager.com/gtag/js?id=G-1GVMC3FXSC&cx=c&gtm=4e64h1	148.7 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.0 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.0 KiB
/sites/default/files/media/images/2023-08/Grant-Seekers_h...	125.1 KiB
www.genome.gov/sites/default/files/google_analytics/gtag.js?tdw9db	123.5 KiB
www.genome.gov/sites/default/files/media/images/2023-08/educators_hero_new8.webp	123.4 KiB
code.jquery.com/ui/1.12.1/jquery-ui.js	121.9 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
NHGRI Logo `div.eye > a > div.logo > img#nhgri-logo`	www.genome.gov/themes/custom/nhgri/assets/global/logo-light-nhgri.webp

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

●Layout shift culprits

●Optimize DOM size

●Font display

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●User Timing marks and measures 14 user timings

●Avoid long main-thread tasks 18 long tasks found

●Avoid non-composited animations 1 animated element found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 70 ms

○INP breakdown

○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.

ARIA

Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ABOUT GENOMICS `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
RESEARCH FUNDING `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
RESEARCH AT NHGRI `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
ABOUT HEALTH `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
CAREERS & TRAINING `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
NEWS & EVENTS `div.menu-container > ul.menu-items > a.title-link > div.menu-title`
ABOUT NHGRI `div.menu-container > ul.menu-items > a.title-link > div.menu-title`

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Tables and lists

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
INTRODUCTION TO GENOMICS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
EDUCATIONAL RESOURCES `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
POLICY ISSUES IN GENOMICS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
THE HUMAN GENOME PROJECT `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
HISTORY OF GENOMICS PROGRAM `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FUNDING OPPORTUNITIES `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FUNDED PROGRAMS & PROJECTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
DIVISION AND PROGRAM DIRECTORS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
SCIENTIFIC PROGRAM ANALYSTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
CONTACTS BY RESEARCH AREA `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
NEWS & EVENTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
RESEARCH AREAS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
RESEARCH INVESTIGATORS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
STAFF CLINICIANS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
RESEARCH PROJECTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
CLINICAL RESEARCH `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
DATA TOOLS & RESOURCES `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
NEWS & EVENTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
GENOMICS & MEDICINE `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FAMILY HEALTH HISTORY `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FOR PATIENTS & FAMILIES `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FOR HEALTH PROFESSIONALS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
JOBS AT NHGRI `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
TRAINING AT NHGRI `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
FUNDING FOR RESEARCH TRAINING `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
PROFESSIONAL DEVELOPMENT PROGRAMS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
NHGRI CULTURE `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
NEWS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
EVENTS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
SOCIAL MEDIA `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
BROADCAST MEDIA `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
IMAGE GALLERY `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
VIDEOS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
PRESS RESOURCES `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
ORGANIZATION `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
MISSION AND VISION `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
POLICIES AND GUIDANCE `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
BUDGET `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
INSTITUTE ADVISORS `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
STRATEGIC VISION `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
PARTNER WITH NHGRI `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
STAFF SEARCH `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`
CONTACT US `div#about-genome > div.menu-container > ul.menu-items > li.menu-item`

These are opportunities to improve the experience of reading tabular or list data using 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-*]` attributes match their roles

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

●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

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

●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>`).

●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

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

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

○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.

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

○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.

100

Best Practices

General

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
/sites/default/files/js/js_xi0FtGdjW2Z6VR7E4ps29cMkIygxI-...
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=HHS&subagency=NIH	dap.digitalgov.gov/Federated.js.map

●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

●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

100

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.

○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

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`