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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

51

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
www.ams.org/images/homepage-collage-2025-opt3.png0.0 ms1.6 MiB
www.ams.org/images/landing-members-chatting.jpg0.0 ms140.0 KiB
www.ams.org/images/2026-family-math-night-student-news-tile-320x180.jpg0.0 ms88.0 KiB
www.ams.org/images/large-news-tile-2026-cong-fellow.png0.0 ms80.6 KiB
www.ams.org/js/MathJax/config/TeX-MML-AM_CHTML.js?V=2.7.50.0 ms76.5 KiB
www.ams.org/images/journals-cover-noti-generic.png0.0 ms25.1 KiB
www.ams.org/js/MathJax/MathJax.js?config=TeX-MML-AM_CHTML0.0 ms18.9 KiB
www.ams.org/images/AS-ams-logo.png0.0 ms17.1 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.ams.org/images/bull-cover.png0.0 ms12.6 KiB
www.ams.org/journals/notices/202605/feature-p359.jpg432000.0 s78.7 KiB
scripts.clarity.ms/0.8.59/clarity.js86400.0 s26.2 KiB
www.ams.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s12.7 KiB
www.ams.org/js/cookieconsent.min.js0.0 ms6.5 KiB
static.hotjar.com/c/hotjar-1104779.js?sv=660.0 s6.4 KiB
kit.fontawesome.com/2ad6d7fbd6.js60.0 s5.7 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
cse.google.com/cse.js?cx=433170aa8883642d10.0 ms4.1 KiB
www.ams.org/css/www-homepage.css0.0 ms2.7 KiB
www.ams.org/css/2024BS5Final.css0.0 ms2.7 KiB
www.ams.org/css/www-nav.css0.0 ms2.6 KiB
www.ams.org/js/www-nav.js0.0 ms1.4 KiB
www.ams.org/css/cookieconsent.min.css0.0 ms1.3 KiB
www.ams.org/js/alert.js0.0 ms1.2 KiB
www.google.com/cse/static/style/look/v6/default.css3000.0 s1.2 KiB
www.ams.org/js/rssreader.js0.0 ms987 B
www.google-analytics.com/plugins/ua/linkid.js3600.0 s995 B
www.ams.org/css/alert.css0.0 ms333 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.320912] map[node:map[boundingRect:map[bottom:3521 height:3273 left:0 right:1350 top:248 width:1350] lhId:page-20-MAIN nodeLabel: Advancing research. Creating connections. We are a mathematics society dedic… path:1,HTML,1,BODY,7,MAIN selector:body > main#main snippet:<main class="container-fluid" id="main"> type:node] score:0.301511] map[node:map[boundingRect:map[bottom:744 height:472 left:12 right:1338 top:272 width:1326] lhId:page-23-SECTION nodeLabel:Advancing research. Creating connections. We are a mathematics society dedicat… path:1,HTML,1,BODY,7,MAIN,0,DIV,8,SECTION selector:body > main#main > div#maincontent > section.hero snippet:<section class="hero pattern"> type:node] score:0.013004] map[node:map[boundingRect:map[bottom:969 height:208 left:20 right:1346 top:761 width:1326] lhId:page-16-SECTION nodeLabel:27K+ Members 125 Countries 27 Journals 5M+ Items on MathSciNet path:1,HTML,1,BODY,7,MAIN,0,DIV,10,SECTION selector:body > main#main > div#maincontent > section#statistics snippet:<section class="statistics container p-4 mx-2" id="statistics"> type:node] score:0.00546] map[node:map[boundingRect:map[bottom:56 height:40 left:570 right:728 top:16 width:158] lhId:page-12-LI nodeLabel:Sign in path:1,HTML,1,BODY,6,DIV,1,HEADER,0,NAV,2,DIV,0,UL,0,LI selector:nav.ams-nav > div.ams-nav--quick__container > ul.ams-nav--quick__list > li snippet:<li> type:node] score:0.000563] map[node:map[boundingRect:map[bottom:456 height:83 left:129 right:651 top:373 width:522] lhId:page-7-H1 nodeLabel:Advancing research. Creating connections. path:1,HTML,1,BODY,7,MAIN,0,DIV,8,SECTION,0,DIV,0,DIV,1,DIV,0,H1 selector:div.col-xxl-10 > div.align-items-center > div.col-lg-6 > h1.display-5 snippet:<h1 class="display-5 fw-bold lh-1 mb-3" style="font-family:Merriweather"> type:node] score:0.000263 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/merriweather/v33/u-4e0qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiSeqqJ-mXq1Gi.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/dmsans/v17/rP2Wp2ywxg089UriCZaSExd86J3t9jz86MvyyKy58UfivUw.woff2]]] type:subitems]]]

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.

URLEst Savings
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-14.woff230 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-duotone-900-15.woff225 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-1.woff225 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff220 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-12.woff220 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-0.woff215 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.

URLResource SizeEst Savings
collage of people at AMS meetings div.align-items-center > div.col-10 > div#desktopHero > img.d-block
www.ams.org/images/homepage-collage-2025-opt3.png1.6 MiB1.6 MiB
members chatting at JMM div.container > div.align-items-center > div.col-lg-6 > img.img-fluid
www.ams.org/images/landing-members-chatting.jpg139.7 KiB113.1 KiB
student and instructor have fun doing math game div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/2026-family-math-night-student-news-tile-320x180.jpg87.8 KiB78.6 KiB
Daniela Beckelhymer in black top against blue background div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/large-news-tile-2026-cong-fellow.png80.3 KiB71.2 KiB
Header Image div.container > div.row > div.col-md-4 > img.img-fluid
www.ams.org/journals/notices/202605/feature-p359.jpg78.5 KiB65.7 KiB
Notices cover div.col-6 > div.cover-image > a > img.img-fluid
www.ams.org/images/journals-cover-noti-generic.png25.0 KiB14.4 KiB
AMS logo div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/AS-ams-logo.png16.9 KiB8.4 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:459.069 label:Time to first byte subpart:timeToFirstByte] map[duration:1826.946 label:Resource load delay subpart:resourceLoadDelay] map[duration:611.315 label:Resource load duration subpart:resourceLoadDuration] map[duration:138.373 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: collage of people at AMS meetings
path: 1,HTML,1,BODY,7,MAIN,0,DIV,8,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div.align-items-center > div.col-10 > div#desktopHero > img.d-block
snippet: <img alt="collage of people at AMS meetings" class="d-block img-fluid mx-lg-auto" height="500" loading="lazy" src="/images/homepage-collage-2025-opt3.png" width="700">

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: collage of people at AMS meetings
path: 1,HTML,1,BODY,7,MAIN,0,DIV,8,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div.align-items-center > div.col-10 > div#desktopHero > img.d-block
snippet: <img alt="collage of people at AMS meetings" class="d-block img-fluid mx-lg-auto" height="500" loading="lazy" src="/images/homepage-collage-2025-opt3.png" width="700">

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

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.ams.org/js/MathJax/MathJax.js?config=TeX-MML-AM_CHTML18.9 KiB82 ms
www.ams.org/js/www-nav.js1.4 KiB
www.ams.org/js/cookieconsent.min.js6.5 KiB
www.ams.org/css/cookieconsent.min.css1.3 KiB
www.ams.org/css/www-nav.css2.6 KiB
www.ams.org/css/www-homepage.css2.7 KiB
cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js23.8 KiB83 ms
www.ams.org/js/alert.js1.2 KiB
code.jquery.com/jquery-3.6.0.min.js30.5 KiB298 ms
/css2?family=Bodoni+Moda:ital,wght@0,400;0,500;0,700;1,40...2.3 KiB
/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,9...1.3 KiB226 ms
cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css32.8 KiB295 ms
cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css25.4 KiB124 ms
/ajax/libs/bootstrap-icons/1.10.3/font/bootstrap-icons.mi...10.3 KiB226 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: 863 ms
URLTime Spent
ams.org/393 ms
www.ams.org//470 ms
www.ams.org/home/page0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Advancing research. Creating connections. We are a mathematics society dedic… body > main#main
0.302
Advancing research. Creating connections. We are a mathematics society dedicat… body > main#main > div#maincontent > section.hero
0.013
27K+ Members 125 Countries 27 Journals 5M+ Items on MathSciNet body > main#main > div#maincontent > section#statistics
0.005
Sign in nav.ams-nav > div.ams-nav--quick__container > ul.ams-nav--quick__list > li
0.001
Advancing research. Creating connections. div.col-xxl-10 > div.align-items-center > div.col-lg-6 > h1.display-5
0.000
Sign in nav.ams-nav > div.ams-nav--quick__container > ul.ams-nav--quick__list > li
0.000

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: 40 ms 167.6 KiB
URLTransfer SizeEst Savings
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…102.9 KiB102.1 KiB
cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css32.5 KiB30.7 KiB
cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css24.7 KiB23.5 KiB
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…11.4 KiB11.4 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 330 ms 550.1 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-26G4XFTR63&cx=c&gtm=4e64k0160.2 KiB109.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-PQJKQL137.6 KiB66.2 KiB
www.googletagmanager.com/gtag/js?id=G-26G4XFTR63160.2 KiB65.2 KiB
www.googletagmanager.com/gtag/js?id=UA-2791151-1&cx=c&gtm=4e64k0115.2 KiB65.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-P3772VN127.6 KiB64.0 KiB
/cse/static/element/b33cba5881f68fbf/cse_element__en.js?u...98.5 KiB48.7 KiB
www.ams.org/js/MathJax/config/TeX-MML-AM_CHTML.js?V=2.7.576.5 KiB41.1 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.7 KiB
cse.google.com/adsense/search/async-ads.js43.3 KiB31.5 KiB
code.jquery.com/jquery-3.6.0.min.js30.2 KiB21.6 KiB

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: 0.0 ms 2.8 KiB
URLTransfer SizeEst Savings
www.google.com/cse/static/element/b33cba5881f68fbf/default_v6+en.css9.7 KiB2.8 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.

URLTransfer Size
www.ams.org/images/homepage-collage-2025-opt3.png1.6 MiB
www.googletagmanager.com/gtag/js?id=G-26G4XFTR63&cx=c&gtm=4e64k0160.3 KiB
www.googletagmanager.com/gtag/js?id=G-26G4XFTR63160.3 KiB
www.ams.org/images/landing-members-chatting.jpg140.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-PQJKQL137.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-P3772VN127.9 KiB
www.googletagmanager.com/gtag/js?id=UA-2791151-1&cx=c&gtm=4e64k0115.3 KiB
/cse/static/element/b33cba5881f68fbf/cse_element__en.js?u...98.5 KiB
/s/merriweather/v33/u-4e0qyriQwlOrhSvowK_l5UcA6zuSYEqOzpP...95.4 KiB
www.ams.org/images/2026-family-math-night-student-news-tile-320x180.jpg88.0 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
members chatting at JMM div.container > div.align-items-center > div.col-lg-6 > img.img-fluid
www.ams.org/images/landing-members-chatting.jpg
Notices cover div.col-6 > div.cover-image > a > img.img-fluid
www.ams.org/images/journals-cover-noti-generic.png
Current Bulletin cover div.col-6 > div.cover-image > a > img.img-fluid
www.ams.org/images/bull-cover.png
Daniela Beckelhymer in black top against blue background div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/large-news-tile-2026-cong-fellow.png
student and instructor have fun doing math game div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/2026-family-math-night-student-news-tile-320x180.jpg
AMS logo div.col-md-4 > div.card > a > img.float-left
www.ams.org/images/AS-ams-logo.png

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

●Optimize DOM size
●Forced reflow
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 60 ms
●Minify JavaScript
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.5 s
●Minimizes main-thread work 1.5 s
●Avoid long main-thread tasks 2 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 270 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 50 ms
○INP breakdown
○Avoid non-composited animations
92

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

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
American Mathematical Society Logo, to the homepage nav.ams-nav > a.ams-nav__logo > span.ams-nav__logo__inner > svg

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Continue reading div.row > div.col-md-8 > p > a

These are opportunities to improve the legibility of your content.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Learn more about our privacy policy body > div.cc-window > span#cookieconsent:desc > a.cc-link
Okay body > div.cc-window > div.cc-compliance > a.cc-btn
201 Charles Street Providence, Rhode Island 02904-2213 div.row > div.col-12 > p > a
View Our Privacy Statement div.col-12 > p > small > a
○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
●`[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.
●`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
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●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
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[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 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.
○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
○`<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.
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
SharedStorage
www.ams.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.ams.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.ams.org/cdn-cgi/challenge-platform/scripts/jsd/main.js

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.ams.org/js/rssreader.js line 67, col 28
Failed to fetch RSS feed: TypeError: Cannot set properties of null (setting 'innerHTML') at renderItems (https://www.ams.org/js/rssreader.js:16:23) at parseRSS (https://www.ams.org/js/rssreader.js:58:3) at https://www.ams.org/js/rssreader.js:67:18
●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.ams.org/news?news_id=7462Read 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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