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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

54

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.

RequestCache TTLTransfer Size
/content/dam/bc1/sites/bc-news/2026/spring/chorale-vatica...7200.0 s772.3 KiB
www.bc.edu/etc/designs/bc-web/clientlibs/fonts/icomoon.ttf600.0 s388.6 KiB
embedsocial.com/cdn/js/tailwind.js3600.0 s398.2 KiB
/content/dam/bc1/sites/bc-news/gasson-1050/Gasson spring ...7200.0 s419.5 KiB
/content/dam/bc1/sites/bc-news/2023/fall/gasson-tower-dro...7200.0 s395.0 KiB
/content/dam/bc1/sites/bc-news/campus-various-sized/St Ma...7200.0 s385.9 KiB
www.bc.edu/content/dam/bc1/news/2021/Gasson%20at%20sunset%20(1).jpg7200.0 s344.3 KiB
/content/bc-web/_jcr_content/par/bc_padded_section_584574...0.0 ms184.0 KiB
www.bc.edu/content/dam/bc1/sites/bc-news/2026/spring/ai/AI%201050.jpg7200.0 s182.4 KiB
/content/dam/bc1/sites/bc-news/2026/spring/cstm/AI ethics...7200.0 s118.7 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
/content/dam/bc1/sites/bc-news/students/students on campu...0.0 ms53.7 KiB
www.bc.edu/etc/designs/bc-web/images/logo-alt.png600.0 s46.7 KiB
/signals/config/123663139718402?v=2.9.303&r=stable&domain...1200.0 s46.5 KiB
www.bc.edu/etc/designs/bc-web/images/logo-footer.png600.0 s38.4 KiB
www.bc.edu/etc/designs/bc-web/images/logo-menu.png600.0 s37.2 KiB
www.bc.edu/etc/designs/bc-web/images/logo.png600.0 s30.9 KiB
www.bc.edu/etc/designs/bc-web/images/nav-overlay.png600.0 s24.0 KiB
www.bc.edu/etc/designs/bc-web/images/logo-mobile.png600.0 s23.8 KiB
www.bc.edu/etc/designs/bc-web/images/bg-fade3.png600.0 s21.2 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
i.ytimg.com/vi/GM7bXbFmAhM/mqdefault.jpg7200.0 s20.4 KiB
/signals/config/404858155563755?v=2.9.303&r=stable&domain...1200.0 s16.0 KiB
i.ytimg.com/vi/bMEOQbegLH0/mqdefault.jpg7200.0 s16.5 KiB
i.ytimg.com/vi/vTXSnP3uy1w/mqdefault.jpg7200.0 s14.3 KiB
www.bc.edu/content/dam/bc1/top-tier/css/custom-global.css600.0 s11.4 KiB
i.ytimg.com/vi/dj1AuoX0eGI/mqdefault.jpg7200.0 s10.9 KiB
player.vimeo.com/api/player.js1800.0 s9.0 KiB
www.bc.edu/content/dam/bc1/top-tier/css/home-custom.css600.0 s8.2 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
cse.google.com/cse.js?cx=017979566303760088717:i5wjadpvu2w0.0 ms3.7 KiB
siteimproveanalytics.com/js/siteanalyze_6328366.js86400.0 s8.9 KiB
www.google.com/cse/static/style/look/v6/espresso.css3000.0 s1.4 KiB
www.bc.edu/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js3600.0 s1.0 KiB
apply.bc.edu/ping1792.0 s948 B
/collect?v=2&fmt=js&pid=8454098&time=1776810179535&url=ht...0.0 ms696 B
www.bc.edu/etc/designs/bc-web/js/emergency.js0.0 ms632 B
embedsocial.com/js/iframeContent.min.js604800.0 s5.2 KiB
static.doubleclick.net/instream/ad_status.js900.0 s495 B
/p.css?s=1&k=xjj4ver&ht=tk&f=13378.13379.13380.14545.1454...604800.0 s172 B
/tr/?id=123663139718402&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
/tr/?id=404858155563755&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B

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.

URLEst Savings
www.bc.edu/etc/designs/bc-web/clientlibs/fonts/icomoon.ttf220 ms
/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu...55 ms
/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWu...50 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff240 ms

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:52.864 source:map[column:15 line:26 type:source-location url:https://www.bc.edu/etc/designs/bc-web/jquerylibs.lc-b5c928743c86b0920f915e9221cd7237-lc.min.js 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:52.864 source:map[column:181 line:108 type:source-location url:https://www.bc.edu/etc/designs/bc-web/jquerylibs.lc-b5c928743c86b0920f915e9221cd7237-lc.min.js urlProvider:network]] map[reflowTime:1.026 source:map[type:text value:[unattributed]]] map[reflowTime:1.087 source:map[column:5965 line:0 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.2/modernizr.min.js urlProvider:network]] map[reflowTime:2.223 source:map[column:6495 line:0 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.2/modernizr.min.js urlProvider:network]] map[reflowTime:1.098 source:map[column:1173 line:0 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.2/modernizr.min.js urlProvider:network]] map[reflowTime:0.117 source:map[column:1198 line:0 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.2/modernizr.min.js urlProvider:network]]]

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.

URLResource SizeEst Savings
BC Chorale in front of St. Peter's Basilica div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2026/spring/chorale-vatica...771.6 KiB758.7 KiB
Gasson Hall div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/gasson-1050/Gasson spring ...419.0 KiB406.1 KiB
Gasson tower drone shot div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2023/fall/gasson-tower-dro...394.6 KiB381.7 KiB
exterior of the Woods College collegiate Gothic building div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/campus-various-sized/St Ma...385.4 KiB372.5 KiB
Gasson Hall at sunset section#bc_image_section_369-884907969 > div.bgImage > div > img
www.bc.edu/content/dam/bc1/news/2021/Gasson%20at%20sunset%20(1).jpg343.9 KiB340.3 KiB
Devlin Hall archway a > div > div > img
/content/bc-web/_jcr_content/par/bc_padded_section_584574...183.8 KiB171.3 KiB
a man speaking at a podium div.article-block > a.article-image > div.image > img
www.bc.edu/content/dam/bc1/sites/bc-news/2026/spring/ai/AI%201050.jpg182.0 KiB169.1 KiB
patient room in Catholic hospital div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2026/spring/cstm/AI ethics...118.4 KiB105.7 KiB
header.navbar > a.icon-hamburger > span.menulabel > ::after header.navbar > a.icon-hamburger > span.menulabel > ::after
embedsocial.com/admin/cdncache/feed-media/18063/18063138851682627/image_0.webp64.4 KiB39.7 KiB
students on campus in springtime div#carousel-slides > div#slide-0 > div > img
/content/dam/bc1/sites/bc-news/students/students on campu...53.7 KiB35.3 KiB
Boston College logo div.row > div.col-sm-6 > a > img
www.bc.edu/etc/designs/bc-web/images/logo-mobile.png23.7 KiB23.3 KiB
Most popular majors div.campaign > div#homeCarousel > div#carousel-slides > div#slide-0
/admin/cdncache/feed-media/17876/17876012967589445/image_...48.1 KiB23.0 KiB
140 Commonwealth Avenue Chestnut Hill, MA 02467 div.container-fluid > div.row > div.col-md-6 > div.address
embedsocial.com/admin/cdncache/feed-media/18095/18095968685325697/image_0.jpeg47.5 KiB22.7 KiB
div#homeCarousel > div#carousel-slides > div#slide-0 > ::before div#homeCarousel > div#carousel-slides > div#slide-0 > ::before
www.bc.edu/etc/designs/bc-web/images/bg-fade3.png21.0 KiB20.9 KiB
MENU div.skin-wrap > header.navbar > a.icon-hamburger > span.menulabel
embedsocial.com/admin/cdncache/feed-media/17934/17934518250221928/image_0.webp40.7 KiB17.8 KiB
Careers at BC div > div.bc-link-button > p > a.w-btn
embedsocial.com/admin/cdncache/feed-media/17985/17985515360806539/image_0.webp39.7 KiB16.8 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-1-IMG
nodeLabel: Gasson Hall
path: 1,HTML,1,BODY,4,DIV,2,DIV,1,MAIN,0,DIV,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,DIV,0,IMG
selector: div.article-block > a.article-image > div.image > img
snippet: <img src="/content/dam/bc1/sites/bc-news/gasson-1050/Gasson%20spring%201050%20CC.jpg" alt="Gasson Hall ">

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.

URLTransfer SizeDuration
www.bc.edu/content/dam/bc1/top-tier/css/home-custom.css8.2 KiB
www.bc.edu/content/dam/bc1/top-tier/css/custom-global.css11.4 KiB301 ms
/css?family=Open+Sans:300italic,400italic,600italic,700it...3.5 KiB820 ms
ajax.aspnetcdn.com/ajax/bootstrap/3.3.2/bootstrap.min.js12.2 KiB603 ms
ajax.aspnetcdn.com/ajax/bootstrap/3.3.2/css/bootstrap.min.css26.5 KiB2.0 s
/p.css?s=1&k=xjj4ver&ht=tk&f=13378.13379.13380.14545.1454...172 B753 ms
use.typekit.net/xjj4ver.css1.4 KiB756 ms
/etc/designs/bc-web/clientlibs.lc-2b70443caec2136473f2c73...163.4 KiB4.8 s
/etc/designs/bc-web/jquerylibs.lc-b5c928743c86b0920f915e9...40.3 KiB602 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.

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: 753 ms
URLTime Spent
bc.edu/753 ms
www.bc.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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 8.3 KiB
URLTransfer SizeEst Savings
www.bc.edu/content/dam/bc1/top-tier/css/custom-global.css11.4 KiB3.2 KiB
www.google.com/cse/static/element/b33cba5881f68fbf/default_v6+en.css9.7 KiB2.8 KiB
www.bc.edu/content/dam/bc1/top-tier/css/home-custom.css8.2 KiB2.2 KiB

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 14.0 KiB
URLTransfer SizeEst Savings
/etc/designs/bc-web/clientlibs.lc-5c370045b047e15546ecd8e...69.1 KiB14.0 KiB

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: 600 ms 184.9 KiB
URLTransfer SizeEst Savings
/etc/designs/bc-web/clientlibs.lc-2b70443caec2136473f2c73...163.2 KiB159.9 KiB
ajax.aspnetcdn.com/ajax/bootstrap/3.3.2/css/bootstrap.min.css26.2 KiB24.9 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: 2.3 s 430.9 KiB
URLTransfer SizeEst Savings
connect.facebook.net/en_US/fbevents.js96.5 KiB90.6 KiB
/cse/static/element/b33cba5881f68fbf/cse_element__en.js?u...98.5 KiB66.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-W3J43V177.2 KiB65.2 KiB
www.googletagmanager.com/gtag/js?id=G-HMWF4T36MF&cx=c&gtm=4e64h1156.8 KiB62.2 KiB
/etc/designs/bc-web/clientlibs.lc-5c370045b047e15546ecd8e...69.1 KiB57.4 KiB
www.googletagmanager.com/gtag/js?id=DC-14237026&cx=c&gtm=4e64h1131.1 KiB57.3 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB31.5 KiB

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.

CategoryTime Spent
Script Evaluation1.3 s
Other499 ms
Style & Layout330 ms
Script Parsing & Compilation292 ms
Parse HTML & CSS103 ms
Garbage Collection30 ms
Rendering30 ms

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.

URLTransfer Size
/content/dam/bc1/sites/bc-news/2026/spring/chorale-vatica...772.3 KiB
www.youtube.com/s/player/218d9d92/player_embed.vflset/en_US/base.js471.6 KiB
/content/dam/bc1/sites/bc-news/gasson-1050/Gasson spring ...419.5 KiB
embedsocial.com/cdn/js/tailwind.js398.2 KiB
/content/dam/bc1/sites/bc-news/2023/fall/gasson-tower-dro...395.0 KiB
www.bc.edu/etc/designs/bc-web/clientlibs/fonts/icomoon.ttf388.6 KiB
/content/dam/bc1/sites/bc-news/campus-various-sized/St Ma...385.9 KiB
www.bc.edu/content/dam/bc1/news/2021/Gasson%20at%20sunset%20(1).jpg344.3 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.iLl3DKTx01E.es5....214.7 KiB
/content/bc-web/_jcr_content/par/bc_padded_section_584574...184.0 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
Gasson Hall div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/gasson-1050/Gasson spring ...
BC Chorale in front of St. Peter's Basilica div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2026/spring/chorale-vatica...
a man speaking at a podium div.article-block > a.article-image > div.image > img
www.bc.edu/content/dam/bc1/sites/bc-news/2026/spring/ai/AI%201050.jpg
patient room in Catholic hospital div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2026/spring/cstm/AI ethics...
exterior of the Woods College collegiate Gothic building div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/campus-various-sized/St Ma...
Gasson tower drone shot div.article-block > a.article-image > div.image > img
/content/dam/bc1/sites/bc-news/2023/fall/gasson-tower-dro...
Devlin Hall archway a > div > div > img
/content/bc-web/_jcr_content/par/bc_padded_section_584574...
Boston College div.row > div.col-md-6 > a > img.footer-logo
www.bc.edu/etc/designs/bc-web/images/logo-footer.png
Boston College logo div.row > div.col-sm-6 > a > img
www.bc.edu/etc/designs/bc-web/images/logo-mobile.png

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 5 user timings
●JavaScript execution time 1.3 s
●Avoid long main-thread tasks 12 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 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
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
90

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

When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Most popular majors section.jumbotron > div.campaign > div#homeCarousel > div#carousel-slides

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
nav.nav > ul.nav > li.search > button.icon-search nav.nav > ul.nav > li.search > button.icon-search
nav.nav > ul.nav > li.menu > button.icon-menu nav.nav > ul.nav > li.menu > button.icon-menu

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
Gasson Hall at sunset. div.bgImage > div.text-over > div.content > p

These are opportunities to improve the legibility of your content.

○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
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●ARIA toggle fields have accessible names
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<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.
●Heading elements appear in a sequentially-descending order
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` 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 `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
○`<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.
○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.
○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.
77

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 / WarningSource
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.

SourceDescription
www.bc.edu/
Access to XMLHttpRequest at 'https://boston.enterprise.localist.com/api/2/events?type=30192834580268&pp=4&days=200' from origin 'https://www.bc.edu' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
boston.enterprise.localist.com/api/2/events?type=30192834580268&pp=4&days=200
Failed to load resource: net::ERR_FAILED
●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
92

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 destinationLink Text
www.bc.edu/content/bc-web/admission/visit.htmlLEARN MORE

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

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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