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
/signals/config/1232637663948177?v=2.9.303&r=stable&domai...	1200.0 s	126.6 KiB
cdn.curator.io/5.0/curator.embed.js	0.0 ms	103.1 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
connect.facebook.net/en_US/bundle/sdk.js/	1200.0 s	77.8 KiB
js.hs-analytics.net/analytics/1776801300000/3860938.js	300.0 s	42.3 KiB
js.hubspot.com/web-interactives-embed.js	600.0 s	28.2 KiB
www.redditstatic.com/ads/pixel.js	60.0 s	19.0 KiB
js.hs-banner.com/3860938.js	300.0 s	18.8 KiB
cdn.curator.io/5.0/curator.embed.css	0.0 ms	14.8 KiB
pixel.byspotify.com/ping.min.js	3600.0 s	10.3 KiB
player.vimeo.com/api/player.js	1800.0 s	9.0 KiB
siteimproveanalytics.com/js/siteanalyze_66356018.js	86400.0 s	19.3 KiB
snap.licdn.com/li.lms-analytics/insight.min.js	86400.0 s	18.7 KiB
connect.facebook.net/en_US/sdk.js	1200.0 s	5.1 KiB
js.ipredictive.com/viant_universal_pixel.js	0.0 ms	3.5 KiB
jumbobeacon.tufts.edu/jumbobeacon-www.min.js	600.0 s	1.9 KiB
cdn.curator.io/published/18ad1038-716d-431d-9038-122f0a69b4aa.js	0.0 ms	1.5 KiB
js.hs-scripts.com/3860938.js	90.0 s	1.0 KiB
/collect?v=2&fmt=js&pid=8038201&time=1776801322580&url=ht...	0.0 ms	693 B
/rp.gif?ts=1776801322549&id=a2_h1akiuktr5gi&event=PageVis...	0.0 ms	666 B
cdn.curator.io/published-css/18ad1038-716d-431d-9038-122f0a69b4aa.css	0.0 ms	474 B
/pixel/?ad_log=referer&action=misc&pixid=849dcd4e-5cfc-4a...	0.0 ms	131 B
/p.css?s=1&k=qnx2aja&ht=tk&f=139.140.173.174.175.176.5474...	604800.0 s	172 B
/p.css?s=1&k=xfa2ead&ht=tk&f=4750.5022.5035.5178.5310.541...	604800.0 s	172 B
/tr/?id=1232637663948177&ev=PageView&dl=https%3A%2F%2Fwww...	0.0 ms	16 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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:47.352 source:map[column:22 line:19 type:source-location url:https://www.tufts.edu/core/misc/drupal.init.js?v=10.6.7 urlProvider:network]]]

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

items: [map[reflowTime:17.317 source:map[column:49615 line:1 type:source-location url:https://www.tufts.edu/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:28.23 source:map[column:50335 line:1 type:source-location url:https://www.tufts.edu/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.267 source:map[column:50393 line:1 type:source-location url:https://www.tufts.edu/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.143 source:map[column:50457 line:1 type:source-location url:https://www.tufts.edu/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.184 source:map[column:11455 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/header.js?v=1.x urlProvider:network]] map[reflowTime:0.557 source:map[column:6313 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/hero-landing.js?v=1.x urlProvider:network]] map[reflowTime:0.505 source:map[column:11917 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/hero-landing.js?v=1.x urlProvider:network]] map[reflowTime:0.05 source:map[column:9195 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/hero-landing.js?v=1.x urlProvider:network]] map[reflowTime:0.057 source:map[column:922 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/text-image-overview.js?v=1.x urlProvider:network]] map[reflowTime:0.042 source:map[column:366 line:0 type:source-location url:https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/text-image-overview.js?v=1.x 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: Play Video

path: 1,HTML,1,BODY,10,DIV,0,DIV,0,DIV,4,MAIN,0,DIV,0,DIV,1,DIV,0,ARTICLE,0,DIV,0,DIV,0,DIV,0,DIV

selector: div.node__content > div.home-hero__standard > div.home-hero__standard--outer > div.video--container

snippet: <div class="video--container video video--home video--standard with-video" tabindex="-1">

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
use.typekit.net/xfa2ead.css	1.1 KiB	772 ms
use.typekit.net/qnx2aja.css	1.2 KiB	157 ms
fonts.googleapis.com/css?family=Roboto+Slab:300,400,700&display=swap	1.2 KiB	180 ms
/css?family=Roboto:300,300i,400,400i,500,700,700i&display...	2.2 KiB	846 ms
fonts.googleapis.com/css?family=Open+Sans:300i&display=swap	1.7 KiB
/p.css?s=1&k=qnx2aja&ht=tk&f=139.140.173.174.175.176.5474...	172 B	150 ms
/sites/default/files/css/css_eItqtlOTr74Ueu8lAQdiKOdQwOW1...	68.2 KiB	601 ms
/sites/default/files/css/css_HCfp-gYOwPUvp_waPAXa8_vPjvMp...	15.3 KiB
/p.css?s=1&k=xfa2ead&ht=tk&f=4750.5022.5035.5178.5310.541...	172 B	752 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
/af/3058a4/0000000000000000773599a9/30/l?primer=7cdcb44be...	15 ms
/af/1be3c2/00000000000000007735e606/30/l?primer=7cdcb44be...	10 ms
/af/1c7153/0000000000000000773599d9/30/l?primer=7cdcb44be...	10 ms
/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be...	5.0 ms
/af/23e139/00000000000000007735e605/30/l?primer=7cdcb44be...	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
div.paragraph > div.social-embed > div.social-embed-inner > div.social-embed__bg `div.paragraph > div.social-embed > div.social-embed-inner > div.social-embed__bg`	/themes/custom/tuftsedu_theme/src/images/texture_03__flit...	797.4 KiB	470.1 KiB
Image posted by TuftsUniversity to twitter `div.crt-post-c > div > div.crt-grid-post-content > div.crt-grid-post-image`	pbs.twimg.com/media/HGYholxWIAANbYF.jpg:medium	542.5 KiB	410.7 KiB
Students walk up and down a stone staircase flanked by blossoming trees toward … `div.field > div.field__item > picture > img`	/sites/default/files/styles/large_feature_1536x864/public...	307.1 KiB	293.4 KiB
div.home-hero__standard > div.home-hero__standard--outer > div.video--container > video.ambient-video `div.home-hero__standard > div.home-hero__standard--outer > div.video--container > video.ambient-video`	/sites/default/files/styles/large_feature_1140x619/public...	252.2 KiB	237.2 KiB
A professor and a student huddle over a Japanese textbook. `div.field > div.field__item > picture > img`	/sites/default/files/styles/overview_feature_1536x1712/pu...	145.5 KiB	135.0 KiB
A professor and two students sit around a table with a laptop showing a distrib… `div.field > div.field__item > picture > img`	/sites/default/files/styles/multilink_1240x800/public/202...	136.7 KiB	134.4 KiB
Three graduate students in business-casual attire walk through an elevated glas… `div.field > div.field__item > picture > img`	/sites/default/files/styles/multilink_1240x800/public/202...	105.8 KiB	104.0 KiB
Two students wearing lab coats and blue gloves discuss the contents of a Petri … `div.field > div.field__item > picture > img`	/sites/default/files/styles/overview_feature_1536x1712/pu...	90.4 KiB	83.9 KiB
A group of students talk and laugh in a lecture hall before class. `div.field > div.field__item > picture > img`	/sites/default/files/styles/multilink_1240x800/public/202...	62.9 KiB	61.9 KiB
A man holds paint brushes in a painting studio. `div.field > div.field__item > picture > img`	/sites/default/files/styles/featured_media_1536x860/publi...	49.6 KiB	46.1 KiB
Three students stand smiling next to each other outside `article.media > div.field > picture > img`	/sites/default/files/styles/featured_card_940x660/public/...	39.2 KiB	33.3 KiB
Event image `div.events__stage > div.events__image--container > div.event__image > img`	/sites/default/files/styles/event_image_400x325/public/20...	33.6 KiB	26.1 KiB
A man holds a basketball with both hands and looks up toward the hoop `article.media > div.field > picture > img`	/sites/default/files/styles/featured_card_940x660/public/...	29.6 KiB	25.2 KiB
Adam Kinzinger speaks to a group of students while sitting at a table. `article.media > div.field > picture > img`	/sites/default/files/styles/featured_card_940x660/public/...	18.0 KiB	15.3 KiB

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

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

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: 756 ms

URL	Time Spent
tufts.edu/	756 ms
www.tufts.edu/	0.0 ms

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: 580 ms 86.3 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_eItqtlOTr74Ueu8lAQdiKOdQwOW1...	67.8 KiB	58.2 KiB
/sites/default/files/css/css_HCfp-gYOwPUvp_waPAXa8_vPjvMp...	15.1 KiB	14.3 KiB
cdn.curator.io/5.0/curator.embed.css	14.4 KiB	13.8 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: 4.1 s 845.6 KiB

URL	Transfer Size	Est Savings
fast.wistia.net/assets/external/E-v1.js	161.6 KiB	132.1 KiB
fast.wistia.net/assets/external/E-v1.js	161.6 KiB	121.9 KiB
cdn.curator.io/5.0/curator.embed.js	102.1 KiB	64.8 KiB
www.googletagmanager.com/gtag/js?id=AW-666834536&cx=c&gtm=4e64h1	143.7 KiB	64.6 KiB
www.googletagmanager.com/gtag/js?id=G-3DDNK3T75D&cx=c&gtm=4e64h1	154.0 KiB	64.6 KiB
www.googletagmanager.com/gtag/js?id=G-7QHZNYE3J3&cx=c&gtm=4e64h1	155.9 KiB	64.6 KiB
www.googletagmanager.com/gtag/js?id=AW-780980239	144.7 KiB	63.4 KiB
www.googletagmanager.com/gtag/js?id=DC-14631269&cx=c&gtm=4e64h1	131.1 KiB	57.9 KiB
connect.facebook.net/en_US/bundle/sdk.js/	77.6 KiB	51.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-TLX9SWC	196.5 KiB	48.8 KiB
/signals/config/1232637663948177?v=2.9.303&r=stable&domai...	126.5 KiB	35.3 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	32.6 KiB
www.tufts.edu/core/assets/vendor/jquery/jquery.min.js?v=3.7.1	34.6 KiB	22.1 KiB
browser.sentry-cdn.com/9.6.1/bundle.min.js	24.6 KiB	21.1 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
Unattributable	1.3 s	70 ms	0.0 ms
www.tufts.edu/	1.2 s	19 ms	2.6 ms
www.googletagmanager.com/gtm.js?id=GTM-TLX9SWC	965 ms	771 ms	85 ms
fast.wistia.net/assets/external/E-v1.js	834 ms	609 ms	212 ms
js.hs-analytics.net/analytics/1776801300000/3860938.js	520 ms	401 ms	9.6 ms
/signals/config/1232637663948177?v=2.9.303&r=stable&domai...	336 ms	288 ms	47 ms
cdn.curator.io/5.0/curator.embed.js	336 ms	136 ms	44 ms
www.tufts.edu/core/misc/drupal.init.js?v=10.6.7	294 ms	98 ms	0.2 ms
www.redditstatic.com/ads/pixel.js	282 ms	251 ms	9.7 ms
www.googletagmanager.com/gtag/js?id=DC-14631269&cx=c&gtm=4e64h1	245 ms	211 ms	30 ms
www.googletagmanager.com/gtag/js?id=G-3DDNK3T75D&cx=c&gtm=4e64h1	239 ms	199 ms	37 ms
www.googletagmanager.com/gtag/js?id=AW-666834536&cx=c&gtm=4e64h1	233 ms	197 ms	35 ms
www.googletagmanager.com/gtag/js?id=G-7QHZNYE3J3&cx=c&gtm=4e64h1	229 ms	191 ms	37 ms
connect.facebook.net/en_US/fbevents.js	123 ms	94 ms	28 ms
www.googletagmanager.com/gtag/js?id=AW-780980239	101 ms	62 ms	37 ms
connect.facebook.net/en_US/bundle/sdk.js/	94 ms	73 ms	20 ms
siteimproveanalytics.com/js/siteanalyze_66356018.js	65 ms	43 ms	7.4 ms
cdn.curator.io/published/18ad1038-716d-431d-9038-122f0a69b4aa.js	62 ms	50 ms	0.6 ms
js.hubspot.com/web-interactives-embed.js	51 ms	41 ms	7.8 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	4.0 s
Other	1.9 s
Style & Layout	763 ms
Script Parsing & Compilation	743 ms
Rendering	322 ms
Parse HTML & CSS	160 ms
Garbage Collection	83 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: 20 ms 27.6 KiB

URL	Transfer Size	Est Savings
www.tufts.edu/core/misc/ajax.js?v=10.6.7	20.2 KiB	14.2 KiB
www.tufts.edu/core/misc/drupal.js?v=10.6.7	7.1 KiB	5.6 KiB
www.tufts.edu/core/misc/position.js?v=10.6.7	6.6 KiB	3.6 KiB
www.tufts.edu/core/misc/displace.js?v=10.6.7	2.9 KiB	2.1 KiB
www.tufts.edu/core/misc/dialog/dialog.ajax.js?v=10.6.7	3.4 KiB	2.0 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.tufts.edu/sites/default/files/video/250325_BannerTuftsedu.mp4	24.9 MiB
/themes/custom/tuftsedu_theme/src/images/texture_03__flit...	798.3 KiB
pbs.twimg.com/media/HGYholxWIAANbYF.jpg:medium	543.3 KiB
/sites/default/files/styles/large_feature_1536x864/public...	307.7 KiB
www.tufts.edu/	258.0 KiB
/sites/default/files/styles/large_feature_1140x619/public...	252.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-TLX9SWC	196.8 KiB
fast.wistia.net/assets/external/E-v1.js	162.1 KiB
www.googletagmanager.com/gtag/js?id=G-7QHZNYE3J3&cx=c&gtm=4e64h1	156.0 KiB
www.googletagmanager.com/gtag/js?id=G-3DDNK3T75D&cx=c&gtm=4e64h1	154.1 KiB

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

●User Timing marks and measures 15 user timings

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 3 animated elements found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 100 ms

●Server Backend Latencies 1,200 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

●Avoid large layout shifts 4 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.

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to main content `body.path-frontpage > a.visually-hidden`

These are opportunities to improve keyboard navigation in your application.

○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]` 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.

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

●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

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

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

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○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

○`[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

○`<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

○Form elements have associated labels

○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

○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.

○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
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

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

Source	Description
www.tufts.edu/core/misc/drupal.js?v=10.6.7 line 63, col 6	TypeError: Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'. at Object.attach (https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/forms.js?v=1.x:1:8884) at https://www.tufts.edu/core/misc/drupal.js?v=10.6.7:166:24 at Array.forEach (<anonymous>) at Drupal.attachBehaviors (https://www.tufts.edu/core/misc/drupal.js?v=10.6.7:162:34) at https://www.tufts.edu/core/misc/drupal.init.js?v=10.6.7:32:12 at HTMLDocument.listener (https://www.tufts.edu/core/misc/drupal.init.js?v=10.6.7:20:7)

www.tufts.edu/core/misc/drupal.js?v=10.6.7 line 63, col 6

TypeError: Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'.
    at Object.attach (https://www.tufts.edu/themes/custom/tuftsedu_theme/dist/js/forms.js?v=1.x:1:8884)
    at https://www.tufts.edu/core/misc/drupal.js?v=10.6.7:166:24
    at Array.forEach (<anonymous>)
    at Drupal.attachBehaviors (https://www.tufts.edu/core/misc/drupal.js?v=10.6.7:162:34)
    at https://www.tufts.edu/core/misc/drupal.init.js?v=10.6.7:32:12
    at HTMLDocument.listener (https://www.tufts.edu/core/misc/drupal.init.js?v=10.6.7:20:7)

●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 issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.tufts.edu/academics	Learn more
www.tufts.edu/research	Learn more
now.tufts.edu/2026/04/07/art-became-his-language	Read more
alumniandfriends.tufts.edu/giving-to-tufts	Learn More

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

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Menu `div.mm-panels > div#mm-1 > div.mm-navbar > a.mm-navbar__title`

To appear in search results, crawlers need access to your app.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`