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.

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.

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: Art Institute Fc 1123 0304 2

path: 1,HTML,1,BODY,4,DIV,2,MAIN,0,SECTION,3,SPAN,0,DIV,0,IMG

selector: section.home > span.m-media > div.m-media__img > img

snippet: <img alt="Art Institute Fc 1123 0304 2" class=" " src="https://artic-web.imgix.net/16866be9-e64f-4402-92e7-65c522a4e436/ArtInstit…" sizes="100vw" width="4191" height="4191" data-pin-media="https://artic-web.imgix.net/16866be9-e64f-4402-92e7-65c522a4e436/ArtInstit…" srcset="https://artic-web.imgix.net/16866be9-e64f-4402-92e7-65c522a4e436/ArtInstit…">

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

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
www.artic.edu/dist/styles/app-034b586bea016e319860.css	123.4 KiB	1.2 s
vjs.zencdn.net/7.1.0/video-js.css	10.1 KiB	752 ms

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
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/signals/config/187548848724320?v=2.9.303&r=stable&domain...	1200.0 s	46.9 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
www.artic.edu/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	11.7 KiB
/consent/check/MRVGCRCCOZCJNHLKNYF7HC?pv=31249093223.8758...	0.0 ms	644 B
/tr/?id=187548848724320&ev=PageView&dl=https%3A%2F%2Fwww....	0.0 ms	16 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
Art Institute Fc 1123 0304 2 `section.home > span.m-media > div.m-media__img > img`	/16866be9-e64f-4402-92e7-65c522a4e436/ArtInstitute-FC-112...	84.6 KiB	21.5 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: 1.1 s

URL	Time Spent
artic.edu/	1.1 s
www.artic.edu/	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: 590 ms 222.1 KiB

URL	Transfer Size	Est Savings
www.artic.edu/dist/styles/app-034b586bea016e319860.css	123.2 KiB	116.6 KiB
www.artic.edu/fonts/839322/C882EBAE2B2928A6A.css	105.5 KiB	105.5 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: 590 ms 367.9 KiB

URL	Transfer Size	Est Savings
www.artic.edu/dist/scripts/app-5e23c73c18d5b1b60004.js	136.1 KiB	117.7 KiB
www.googletagmanager.com/gtag/destination?id=AW-988177400&cx=c&gtm=4e64k0	133.9 KiB	67.4 KiB
www.googletagmanager.com/gtag/js?id=G-L4S7N7GSLD&cx=c&gtm=4e64k0	170.6 KiB	67.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-MQBCFS	172.8 KiB	62.1 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	29.6 KiB
s.adroll.com/j/MRVGCRCCOZCJNHLKNYF7HC/roundtrip.js	30.0 KiB	23.7 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.artic.edu/dist/scripts/app-5e23c73c18d5b1b60004.js	954 ms	164 ms	39 ms
www.artic.edu/	797 ms	73 ms	3.5 ms
Unattributable	328 ms	21 ms	0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-MQBCFS	302 ms	250 ms	40 ms
www.artic.edu/cdn-cgi/challenge-platform/scripts/jsd/main.js	231 ms	222 ms	2.4 ms
www.googletagmanager.com/gtag/js?id=G-L4S7N7GSLD&cx=c&gtm=4e64k0	211 ms	172 ms	38 ms
www.googletagmanager.com/gtag/destination?id=AW-988177400&cx=c&gtm=4e64k0	120 ms	92 ms	27 ms
/signals/config/187548848724320?v=2.9.303&r=stable&domain...	116 ms	101 ms	14 ms
connect.facebook.net/en_US/fbevents.js	103 ms	77 ms	25 ms
www.artic.edu/dist/styles/app-034b586bea016e319860.css	60 ms	0.0 ms	0.0 ms
www.google-analytics.com/analytics.js	55 ms	44 ms	3.8 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	1.2 s
Other	799 ms
Style & Layout	589 ms
Rendering	347 ms
Script Parsing & Compilation	206 ms
Parse HTML & CSS	133 ms
Garbage Collection	23 ms

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

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,697 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 12 long tasks found

●Avoid non-composited animations 2 animated elements found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 110 ms

●Server Backend Latencies 320 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

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

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
News and Exhibitions Career Opportunities Families Public Programs K-12 Educato… `form.m-aside-newsletter > fieldset > div.m-aside-newsletter__field__wrapper > div.m-aside-newsletter__list-wrapper`

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.m-collection-wrapper > div.m-collection-heading > div.m-collection-slider-controls > button.b-drag-scroll__btn-prev `div.m-collection-wrapper > div.m-collection-heading > div.m-collection-slider-controls > button.b-drag-scroll__btn-prev`
div.m-collection-wrapper > div.m-collection-heading > div.m-collection-slider-controls > button.b-drag-scroll__btn-next `div.m-collection-wrapper > div.m-collection-heading > div.m-collection-slider-controls > button.b-drag-scroll__btn-next`

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.home-top-info > div > div > a`
`div.home-top-info > div > div > a`
`div.home-top-info > div > div > a`
div.home-top-info > div > div > a `div.home-top-info > div > div > a`
main#content > div.o-landingpage__body > div.m-feature-block-heading > a `main#content > div.o-landingpage__body > div.m-feature-block-heading > a`
main#content > div.o-landingpage__body > div.m-feature-block-heading > a `main#content > div.o-landingpage__body > div.m-feature-block-heading > a`

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.

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
Discover the prints that made Matisse famous (again) in his 70s—his Jazz series… `div.m-showcase-wrapper > div.m-showcase-block__text-wrapper > div.f-secondary > p`
Jazz `div.m-showcase-block__text-wrapper > div.f-secondary > p > em`
Exhibition tickets are $5 in addition to general admission. Members never need … `div.m-showcase-wrapper > div.m-showcase-block__text-wrapper > div.f-secondary > p`
Learn more `div.m-showcase-block > div.m-showcase-wrapper > div.m-showcase-block__text-wrapper > a.link`
Explore thousands of artworks in the museum’s collection—from our renowned icon… `div.m-collection-content > div.m-collection-info > div.collection-desc > p`

These are opportunities to improve the legibility of your content.

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
Large painting of people in a crowded park, brushstrokes are dots. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Abstract painting composed of small vertical dabs of multiple shades of blue wi… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
A work made of oil and gouache on canvas. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Painting of mother in blue, purple, and green-stripped dress washing child's fe… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Gold knife with figure on handle, round turquoise inlays on crown. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Large black sculpture in the shape of Africa. The form is covered in gold chain… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Wooden sculpture of seated king surrounded by family. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
St. George on white horse, piercing green, gold dragon `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
A female figure with a round face in a full orange robe is bent almost wearily … `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Miniature room with two tall windows framing a small Cubist painting and a fire… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Painting of bedroom, blue walls, green window, tan bed, red bedding. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Dark stone sculpture of Buddha sitting cross-legged, hands in lap, eyes closed. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Abstract painting composed of a central tangle of vibrant colors—purple, pink, … `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Portrait of man wearing voluminous black cloak, feathered hat, and gold medalli… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Painting of a pond seen up close spotted with thickly painted pink and white wa… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Painting of a woman and an older white man holding a pitchfork, both seen from … `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Scene in a diner, viewed through wrap-around glass windows, at night on an empt… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
White marble bust of woman wearing headband and tunic. `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Painting, mostly in shades of blue, of a thin, bent, older man wearing ragged c… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`
Abstract painting, black background covered with flicks and smudges of white an… `div.m-collection-content > div.m-collection-artworks > div.m-collection-row > li.m-listing`

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>`

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

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[role]`s are contained by their required parent element

●`[role]` values are valid

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

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

●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.

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

●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.

●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

●ARIA IDs are unique

●Elements with visible text labels have matching accessible names.

○`[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 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

○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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

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

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

○`[lang]` attributes have a valid value

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

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

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

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

○Identical links have the same purpose.

○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)
div.details > span.details__container > a.title-link > img.details-image `div.details > span.details__container > a.title-link > img.details-image`	/b55a24a5-ab1c-453e-9ecd-e30ee5473f6e/navigation-thumbnai...	240 x 513 (0.47)	750 x 513 (1.46)
div.details > span.details__container > a.title-link > img.details-image `div.details > span.details__container > a.title-link > img.details-image`	/fd36787d-a4f7-480c-8e34-11115a9d240a/navigation-thumbnai...	240 x 500 (0.48)	750 x 500 (1.50)
div.details > span.details__container > a.title-link > img.details-image `div.details > span.details__container > a.title-link > img.details-image`	/d335c986-7075-4753-a84f-9cb11876ac77/navigation-thumbnai...	240 x 500 (0.48)	750 x 500 (1.50)

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
SharedStorage	www.artic.edu/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	www.artic.edu/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	www.artic.edu/cdn-cgi/challenge-platform/scripts/jsd/main.js
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
www.artic.edu/dist/scripts/app-5e23c73c18d5b1b60004.js	www.artic.edu/dist/scripts/app-5e23c73c18d5b1b60004.js.map

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●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

○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.artic.edu/exhibitions/10557/matisse-s-jazz-rhythms-in-color	Learn more
www.artic.edu/articles-videos	See 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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid