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
/builds/core/fb57663/es2018/js/adthrive.min.js?deployment...	3600.0 s	369.0 KiB
www.encyclopedia.com/sites/default/files/images/hero/enc_hero01_3.png	86400.0 s	568.7 KiB
ads.adthrive.com/builds/core/fb57663/gdpr/vendor/prebid/es2018/prebid.min.js	86400.0 s	159.2 KiB
c.aps.amazon-adsystem.com/apstag.js	3600.0 s	78.4 KiB
cdn.consentmanager.net/delivery/js/cmp_final.min.js	86400.0 s	100.8 KiB
www.encyclopedia.com/sites/default/files/4/2793250.jpg	86400.0 s	76.8 KiB
/sites/default/files/css/css_k9u1IODySqC3j4I1pBBMqRSLt5ZK...	86400.0 s	47.0 KiB
www.encyclopedia.com/sites/default/files/0/627218.jpg	86400.0 s	46.3 KiB
www.encyclopedia.com/sites/default/files/4/2796049.jpg	86400.0 s	44.2 KiB
www.encyclopedia.com/sites/default/files/6/2801633.jpg	86400.0 s	43.6 KiB
/delivery/customdata/bV8xLndfODY2ODUucl9HRFBSLmxfZW4uZF81...	3600.0 s	21.5 KiB
www.encyclopedia.com/sites/default/files/4/2792955.jpg	86400.0 s	42.6 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
www.encyclopedia.com/sites/default/files/10/5985964.jpg	86400.0 s	36.2 KiB
/sites/default/files/js/js_c8LbWbHV1txem3q8oAzuadnL-HiBSh...	86400.0 s	30.7 KiB
/sites/default/files/images/whouseit/a70c83d26434d18cd908...	86400.0 s	24.2 KiB
/sites/default/files/css/css_PKoD1c51rXhDWjoL2z3EIsRnpif7...	86400.0 s	23.6 KiB
www.encyclopedia.com/sites/default/files/6/2801644.jpg	86400.0 s	23.6 KiB
/sites/default/files/images/whouseit/nytimes-logo-png-new...	86400.0 s	22.5 KiB
www.encyclopedia.com/sites/default/files/images/whouseit/nasa2.png	86400.0 s	19.8 KiB
/sites/default/files/js/js_7riCSsmZKOyjnTzzQILMa9_W2mWycO...	86400.0 s	15.0 KiB
/sites/default/files/js/js_yLV6HYxC2Rnf9ZekS8oWsZmUNhr7Fk...	86400.0 s	14.2 KiB
www.encyclopedia.com/themes/custom/trustme/images/header-logo.jpg	86400.0 s	13.8 KiB
/sites/default/files/js/js_WGXfBW_MzOchPG9FUX5M7UvHZXqRJr...	86400.0 s	11.4 KiB
/sites/default/files/js/js_zqxY3WQzYNR0NiKCpM5itT0--wb4Ea...	86400.0 s	9.6 KiB
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...	2874.0 s	4.2 KiB
www.encyclopedia.com/sites/default/files/3/2014558.jpg	86400.0 s	4.9 KiB
config.aps.amazon-adsystem.com/configs/4fbba76f-7987-4fa2-9733-c27eb3a2170b	3600.0 s	2.3 KiB
cdn-images.mailchimp.com/embedcode/classic-061523.css	0.0 ms	1.8 KiB
/sites/default/files/js/js_zUQZP_05aEQQEOMOyF3c6jn8AsMhZP...	86400.0 s	4.5 KiB
www.encyclopedia.com/sites/default/files/images/hero/ColumbiaLogo%402x_1.png	86400.0 s	4.4 KiB
www.encyclopedia.com/sites/default/files/images/hero/CengageLogo%402x_2.png	86400.0 s	2.9 KiB
/sites/default/files/css/css_AxrMp2NNpMECnjp7kzTMN0neY6nP...	86400.0 s	2.5 KiB
www.encyclopedia.com/sites/default/files/images/hero/OxfordLogo%402x_2.png	86400.0 s	2.5 KiB
ads.adthrive.com/builds/customizations/5dc336ff22eddf534ab4417c.js	0.0 ms	972 B
ads.adthrive.com/sites/5dc336ff22eddf534ab4417c/ads.min.css	3600.0 s	1.0 KiB

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.

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
THE WORLD’S #1 ONLINE ENCYCLOPEDIA Search over 200 individual encyclopedias an… `div#wrapper > div.dialog-off-canvas-main-canvas > div.homepage > div#block-heroblock`	www.encyclopedia.com/sites/default/files/images/hero/enc_hero01_3.png	568.0 KiB	410.0 KiB
Pandemic Flu `div.whoslooking-slider > div.whoslooking-item > div > img`	/sites/default/files/images/whouseit/a70c83d26434d18cd908...	23.6 KiB	22.0 KiB
The Anglerfish `div.whoslooking-slider > div.whoslooking-item > div > img`	/sites/default/files/images/whouseit/nytimes-logo-png-new...	21.9 KiB	20.2 KiB
Bacteriophages `div.whoslooking-slider > div.whoslooking-item > div > img`	www.encyclopedia.com/sites/default/files/images/whouseit/nasa2.png	19.2 KiB	17.4 KiB
Explorers, Travelers, and Conquerors: Biographies Hernan Cortes Hernán Cortés … `div.popular-topics-container > div.ency-topics > a > div.ency-topic-bkg`	www.encyclopedia.com/sites/default/files/4/2796049.jpg	43.7 KiB	16.3 KiB
U.S. History Boston Tea Party Boston Tea Party 1773. `div.popular-topics-container > div.ency-topics > a > div.ency-topic-bkg`	www.encyclopedia.com/sites/default/files/4/2793250.jpg	76.3 KiB	11.2 KiB
Buddhism Pure Land Buddhism Pure Land Buddhism or Amidism, devotional sect of … `div.popular-topics-container > div.ency-topics > a > div.ency-topic-bkg`	www.encyclopedia.com/sites/default/files/6/2801633.jpg	43.1 KiB	7.9 KiB
Taxation Income Tax income tax assessment levied upon individual or corporate … `div.popular-topics-container > div.ency-topics > a > div.ency-topic-bkg`	www.encyclopedia.com/sites/default/files/0/627218.jpg	45.7 KiB	6.9 KiB
Pathology Autism autism , developmental disability resulting from a neurologic… `div.popular-topics-container > div.ency-topics > a > div.ency-topic-bkg`	www.encyclopedia.com/sites/default/files/4/2792955.jpg	42.0 KiB	4.8 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV

nodeLabel: THE WORLD’S #1 ONLINE ENCYCLOPEDIA Search over 200 individual encyclopedias an…

path: 1,HTML,1,BODY,5,DIV,1,DIV,0,DIV,0,DIV

selector: div#wrapper > div.dialog-off-canvas-main-canvas > div.homepage > div#block-heroblock

snippet: <div style="background-image: url('/sites/default/files/images/hero/enc_hero01_3.png');" id="block-heroblock" class="ency-loaded">

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

value: No additional origins are good candidates for preconnecting

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
/sites/default/files/css/css_k9u1IODySqC3j4I1pBBMqRSLt5ZK...	47.0 KiB	276 ms
/sites/default/files/css/css_PKoD1c51rXhDWjoL2z3EIsRnpif7...	23.6 KiB	196 ms
/sites/default/files/css/css_AxrMp2NNpMECnjp7kzTMN0neY6nP...	2.5 KiB	76 ms
cdn-images.mailchimp.com/embedcode/classic-061523.css	1.8 KiB	242 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: 296 ms

URL	Time Spent
encyclopedia.com/	296 ms
www.encyclopedia.com/	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

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: 80 ms 59.7 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_k9u1IODySqC3j4I1pBBMqRSLt5ZK...	46.5 KiB	37.2 KiB
/sites/default/files/css/css_PKoD1c51rXhDWjoL2z3EIsRnpif7...	23.1 KiB	22.5 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: 40 ms 720.1 KiB

URL	Transfer Size	Est Savings
/builds/core/fb57663/es2018/js/adthrive.min.js?deployment...	368.7 KiB	163.3 KiB
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...	187.4 KiB	129.9 KiB
ads.adthrive.com/builds/core/fb57663/gdpr/vendor/prebid/es2018/prebid.min.js	158.8 KiB	124.7 KiB
s3.amazonaws.com/downloads.mailchimp.com/js/mc-validate.js	139.9 KiB	90.1 KiB
www.googletagmanager.com/gtag/js?id=G-VTWQL8EHT3&cx=c&gtm=4e64h1	154.5 KiB	62.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-W4GBLXB	117.1 KiB	62.2 KiB
c.aps.amazon-adsystem.com/apstag.js	77.8 KiB	50.5 KiB
cdn.consentmanager.net/delivery/js/cmp_final.min.js	100.4 KiB	36.7 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
Bacteriophages `div.whoslooking-slider > div.whoslooking-item > div > img`	www.encyclopedia.com/sites/default/files/images/whouseit/nasa2.png
The Anglerfish `div.whoslooking-slider > div.whoslooking-item > div > img`	/sites/default/files/images/whouseit/nytimes-logo-png-new...
Pandemic Flu `div.whoslooking-slider > div.whoslooking-item > div > img`	/sites/default/files/images/whouseit/a70c83d26434d18cd908...
div#block-heroblock > div.clear-both > div.list-img > img `div#block-heroblock > div.clear-both > div.list-img > img`	www.encyclopedia.com/sites/default/files/images/hero/OxfordLogo%402x_2.png
div#block-heroblock > div.clear-both > div.list-img > img `div#block-heroblock > div.clear-both > div.list-img > img`	www.encyclopedia.com/sites/default/files/images/hero/ColumbiaLogo%402x_1.png
div#block-heroblock > div.clear-both > div.list-img > img `div#block-heroblock > div.clear-both > div.list-img > img`	www.encyclopedia.com/sites/default/files/images/hero/CengageLogo%402x_2.png

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

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 60 ms

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 2,629 KiB

●User Timing marks and measures 11 user timings

●JavaScript execution time 0.3 s

●Minimizes main-thread work 0.8 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 100 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 30 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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Accept All `div.cmpboxbtns > span#cmpwelcomebtnyes > a.cmpboxbtn > span#cmpbntyestxt`
div.ency-hero-search > form > div#edit-actions > input#edit-submit `div.ency-hero-search > form > div#edit-actions > input#edit-submit`
Recently researched about `div.clear-both > div.whoslooking-slider > div.whoslooking-item > span`
Recently researched about `div.clear-both > div.whoslooking-slider > div.whoslooking-item > span`
Recently researched about `div.clear-both > div.whoslooking-slider > div.whoslooking-item > span`
SUBSCRIBE TO OUR NEWSLETTER `div#block-mailchimp > div > div#mc_embed_signup > h2`
Sign up with your email address to receive news and updates. `div#block-mailchimp > div > div#mc_embed_signup > p.secondary-text`
We respect your privacy. `div#block-mailchimp > div > div#mc_embed_signup > p.privacy-text`
HOME `nav#block-trustme-footer > ul > li > a.is-active`
ABOUT US `nav#block-trustme-footer > ul > li > a`
HELP `nav#block-trustme-footer > ul > li > a`
SITE FEEDBACK `nav#block-trustme-footer > ul > li > a`
PRIVACY & COOKIE POLICY `nav#block-trustme-footer > ul > li > a`
TERMS AND CONDITIONS `nav#block-trustme-footer > ul > li > a`
DAILY `nav#block-trustme-footer > ul > li > a`
© 2019 Encyclopedia.com \| All rights reserved. `div#block-trustme-copyright > div > p > span`
Update Privacy Preferences `body.path-frontpage > div.adthrive-comscore > div.adthrive-privacy-preferences > a`
A RAPTIVE PARTNER SITE `body.path-frontpage > div.adthrive-comscore > span`

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
THE WORLD’S #1 ONLINE ENCYCLOPEDIA `div.dialog-off-canvas-main-canvas > div.homepage > div#block-heroblock > h4`

These are opportunities to improve keyboard navigation in your application.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta `head > meta`

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

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●Form elements have associated labels

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

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

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

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

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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○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

○Buttons have an accessible name

○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.

○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.

○`<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.

○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
Topics	ads.adthrive.com/builds/core/fb57663/gdpr/vendor/prebid/es2018/prebid.min.js line 62, col 181510

●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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

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.encyclopedia.com/about	Read more

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

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`