Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

7 REVIEW 6 FIX

Link & Button Quality

Action

19 issue(s) across 135 links and 11 buttons

FIX

19 issue(s) across 135 links and 11 buttons

15 link(s) with no accessible text

Links without text are announced as raw URLs by screen readers.

Got: #; #; javascript:void(0); /antibody/primary/?icid=Default_WB48737; /us/en/home/global/forms/antibody-labeling-kit-tumbler-promo.html?icid=Defaul…; /us/en/home/life-science/antibodies/antibodies-learning-center/antibody-proto…; /us/en/home/clinical/biobanking/biobanking-learning-center.html?icid=Default_…; /us/en/home/technical-resources/technical-reference-library.html?icid=Default…; /us/en/home/products-and-services/promotions.html?icid=Default_WB45422; /search/onlineoffers?icid=Default_WB41554 (+5 more)

4 link(s) with generic text

Generic link text like 'click here' doesn't describe the destination.

Got: /us/en/home/life-science/antibodies/antibodies-learning-center/antibody-proto… ("Learn more"); /us/en/home/electron-microscopy/products/accessories-em/selectris.html?icid=D… ("Learn more"); /us/en/home/electron-microscopy/products/software-em-3d-vis/imaging-data-mana… ("Learn more"); /us/en/home/life-science/stem-cell-research/induced-pluripotent-stem-cells/st… ("Learn more")

6 link(s) open in new tab without warning

Add '(opens in new tab)' to link text or aria-label.

Got: https://corporate.thermofisher.com; https://jobs.thermofisher.com; https://ir.thermofisher.com; https://newsroom.thermofisher.com; https://corporate.thermofisher.com/us/en/index/corporate-social-responsibilit…; https://thermofisher.mastercontrol.com:443/thermofisher/main/index.cfm?event=…

110 link(s) with descriptive text

135 links

15 empty

4 generic text

6 new tab

0 empty buttons

Element	Text	Issue	Suggested Fix
#	(empty)	empty	Add link text or aria-label
#	(empty)	empty	Add link text or aria-label
javascript:void(0)	(empty)	empty	Add link text or aria-label
/antibody/primary/?icid=Default_WB48737	(empty)	empty	Add link text or aria-label
/us/en/home/global/forms/antibody-labeli…	(empty)	empty	Add link text or aria-label
/us/en/home/life-science/antibodies/anti…	(empty)	empty	Add link text or aria-label
/us/en/home/life-science/antibodies/anti…	Learn more	generic text	Replace with descriptive text
Before: Learn more Suggested: Antibody Protocols.Html?Icid=Default Wb48737
/us/en/home/clinical/biobanking/biobanki…	(empty)	empty	Add link text or aria-label
/us/en/home/technical-resources/technica…	(empty)	empty	Add link text or aria-label
/us/en/home/products-and-services/promot…	(empty)	empty	Add link text or aria-label
/search/onlineoffers?icid=Default_WB4155…	(empty)	empty	Add link text or aria-label
/us/en/home/products-and-services/promot…	(empty)	empty	Add link text or aria-label
/search/onlineoffers?icid=Default_WB4155…	(empty)	empty	Add link text or aria-label
/us/en/home/electron-microscopy/products…	(empty)	empty	Add link text or aria-label
/us/en/home/electron-microscopy/products…	Learn more	generic text	Replace with descriptive text
Before: Learn more Suggested: Selectris.Html?Icid=Default Wb44946
/us/en/home/electron-microscopy/products…	(empty)	empty	Add link text or aria-label
/us/en/home/electron-microscopy/products…	Learn more	generic text	Replace with descriptive text
Before: Learn more Suggested: Athena Software For Core Imaging Facilities.Html?Icid=Default Wb45102
/us/en/home/life-science/stem-cell-resea…	(empty)	empty	Add link text or aria-label
/us/en/home/life-science/stem-cell-resea…	Learn more	generic text	Replace with descriptive text
Before: Learn more Suggested: Stemscale Psc Suspension Medium.Html?Icid=Default Wb311720
https://corporate.thermofisher.com	About Us	new tab	Add '(opens in new tab)' to text
https://jobs.thermofisher.com	Careers	new tab	Add '(opens in new tab)' to text
https://ir.thermofisher.com	Investors	new tab	Add '(opens in new tab)' to text
https://newsroom.thermofisher.com	News	new tab	Add '(opens in new tab)' to text
https://corporate.thermofisher.com/us/en…	Social Responsibility	new tab	Add '(opens in new tab)' to text
https://thermofisher.mastercontrol.com:4…	Consumer Health Data Privacy P…	new tab	Add '(opens in new tab)' to text

121 links and buttons have descriptive text

Links without text are announced as raw URLs by screen readers.

#; #; javascript:void(0); /antibody/primary/?icid=Default_WB48737; /us/en/home/global/forms/antibody-labeling-kit-tumbler-promo.html?icid=Defaul…; /us/en/home/life-science/antibodies/antibodies-learning-center/antibody-proto…; /us/en/home/clinical/biobanking/biobanking-learning-center.html?icid=Default_…; /us/en/home/technical-resources/technical-reference-library.html?icid=Default…; /us/en/home/products-and-services/promotions.html?icid=Default_WB45422; /search/onlineoffers?icid=Default_WB41554 (+5 more)

Why this matters

Links with no accessible text (empty <a></a>, image-only no alt, icon-only no aria-label) are unidentifiable to screen readers.

Source: WCAG 2.1 SC 2.4.4

Generic link text like 'click here' doesn't describe the destination.

/us/en/home/life-science/antibodies/antibodies-learning-center/antibody-proto… ("Learn more"); /us/en/home/electron-microscopy/products/accessories-em/selectris.html?icid=D… ("Learn more"); /us/en/home/electron-microscopy/products/software-em-3d-vis/imaging-data-mana… ("Learn more"); /us/en/home/life-science/stem-cell-research/induced-pluripotent-stem-cells/st… ("Learn more")

Why this matters

Generic anchor text ('click here', 'read more', 'learn more') tells screen readers and search engines nothing about the destination.

Learn more ▾

Out-of-context lists of links read by AT (one navigation pattern) become useless when every link says 'click here'. Use the destination's title or topic as anchor text. Doubles as SEO win — Google passes anchor-text relevance to the destination.

Source: WCAG 2.4.4 / Google Search Central

Add '(opens in new tab)' to link text or aria-label.

https://corporate.thermofisher.com; https://jobs.thermofisher.com; https://ir.thermofisher.com; https://newsroom.thermofisher.com; https://corporate.thermofisher.com/us/en/index/corporate-social-responsibilit…; https://thermofisher.mastercontrol.com:443/thermofisher/main/index.cfm?event=…

Why this matters

Links with target="_blank" without rel="noopener" leak the originating page's window context — security and UX issue.

Learn more ▾

Without rel="noopener", the new tab can navigate the original tab via window.opener (tab-nabbing attack). Modern browsers default to noopener for target=_blank but only since recent versions. Always set rel="noopener noreferrer" explicitly.

Source: MDN target / OWASP

Favicon & Branding

Action

No icons detected

FIX

No icons detected

No favicon.ico at site root

Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.

No apple-touch-icon detected

iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.

No favicon or icon links detected

Your site will show the browser's generic page icon in tabs, bookmarks, and home screens.

✗ favicon.ico Missing

✗ PNG Icons Missing

✗ Apple Touch Missing

✗ SVG Favicon Missing

✗ Manifest Icons Missing

✗ Multiple Sizes Missing

Web Manifest

Action

Not found

FIX

Not found

No web manifest found

No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

No web manifest found.

Dark Mode Support

Action

No dark mode signals

FIX

No dark mode signals

No dark mode signals detected

Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.

Detection limited to meta tags and inline styles

External CSS files may contain prefers-color-scheme rules not visible to this scan.

Dark ModeNo Dark Mode Detected

color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

Print Stylesheet

Action

No print styles

FIX

No print styles

No print-specific styles detected

When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

Print Stylesheet No Print Styles

Print stylesheet Not found ✗Inline @media print Not detected ✗

Landmark Structure

Action

5 landmarks

REVIEW

5 landmarks

No <main> landmark found

Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.

1 <nav> landmark(s) found

Skip navigation link is missing (WCAG 2.4.1)

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Search landmark present

Page Structure — as a screen reader sees it

Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.

Why this matters

Without a <main> landmark, screen-reader users can't skip past the navigation to the page content — every page starts with re-reading the menu.

Learn more ▾

The <main> element marks the page's primary content area. Assistive tech offers a 'jump to main' shortcut — but only if <main> exists. Without it, every page navigation forces re-reading the header. Wrap your primary content in a single <main>.

Source: WAI-ARIA / WCAG 2.4.1

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Why this matters

Without a skip-nav link, keyboard users tab through every nav item before reaching content — every page, every visit.

Learn more ▾

WCAG 2.4.1 (Bypass Blocks) requires a mechanism to skip past repeated content. The standard implementation is a 'Skip to main content' link that's the first focusable element, visually hidden until focused. Three lines of HTML + four of CSS.

Source: WCAG 2.1 SC 2.4.1

Heading Hierarchy

4 headings

REVIEW

4 headings

No H1 heading found

Every page should have one H1 that describes the page content.

H2 Featured Education
H2 Accelerating Science
H2 Promotions
H2 New products

Every page should have one H1 that describes the page content.

Why this matters

No H1 means screen-reader users can't identify the page's primary topic, and Google's content-extraction degrades.

Learn more ▾

The H1 is the document title for assistive tech and a strong signal to search engines about page topic. Pages without one force screen readers to fall back to the <title> attribute or page chrome. Add a single H1 that names the page's primary subject.

Source: WCAG 2.4.6 / Google Search Central

Alt Text Quality

Action

4 of 25 images have issues

REVIEW

4 of 25 images have issues

4 image(s) missing alt attribute

Images without alt text are invisible to screen readers.

21 image(s) with good alt text

25 images 21 good alt text 4 missing

Issue	Count
missing	4 image(s)

Images without alt text are invisible to screen readers.

Why this matters

Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.

Learn more ▾

WCAG 2.1 Level A requires text alternatives for non-decorative images. Empty alt='' is fine for decorative; meaningful images need descriptive text. Common fixes: CMS audit + bulk add, build-time linter (alt-text-required ESLint rule), CI gate on Lighthouse a11y score.

Source: WCAG 2.1 SC 1.1.1 / WebAIM Million Report

Form Accessibility

2 of 2 controls have issues

REVIEW

2 of 2 controls have issues

1 control(s) without accessible label

Form controls need a <label>, aria-label, or aria-labelledby for screen readers.

Got: <input type="text" id="header-typeahead-suggested">

1 control(s) rely on placeholder only

Placeholder text disappears on focus and is not a reliable label.

Got: <input type="text" name="query" id="suggest1">

2 controls

0 labeled

1 placeholder only

1 unlabeled

Control	Type	Label	Method
#suggest1	text	(Search)	placeholder only
#header-typeahead-suggested	text	(none)	none

Form controls need a <label>, aria-label, or aria-labelledby for screen readers.

Why this matters

Form controls without labels — assistive tech announces 'edit text' with no context; users can't complete forms.

Source: WCAG 2.1 SC 3.3.2

Placeholder text disappears on focus and is not a reliable label.

Why this matters

Placeholder-only labels disappear when the user starts typing — they must remember what the field was for.

Learn more ▾

Placeholders are NOT labels. They vanish on input, fail color contrast checks (most are gray), and don't satisfy WCAG SC 3.3.2. Always use a real <label> alongside (or aria-labelledby).

Source: WCAG 2.1 SC 3.3.2 / Nielsen Norman

404 Error Page

Action

Could not test

REVIEW

Could not test

404 page could not be tested

The 404 page check encountered an error. This may be due to a timeout or network issue.

404 page quality check not available.

Color Contrast (Screenshot)

Action

20 text elements analyzed, 3 fail WCAG AA

REVIEW

Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.

17 pass 3 fail WCAG AA

a Create Account

1.99:1

#000000

#423C50

needs 4.5:1 (normal text)

16px · above the fold · over background image/gradient

li Products

2.53:1

#000000

#484E60

needs 4.5:1 (normal text)

16px · above the fold

a Antibodies

4.02:1

#000000

#6A6B7E

needs 4.5:1 (normal text)

16px · above the fold · over background image/gradient

2 contrast failures on background images/gradients

These failures are invisible to CSS-based accessibility tools like Lighthouse. The text may be fine on a solid background, but fails when rendered over an image or gradient.

Show all checked elements (20)

Element	Ratio	Required	FG	BG	Result
h2 Featured Education	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Accelerating Science	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Promotions	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 New products	21.00:1	3.0:1	#000000	#FFFFFF	Pass
title Thermo Fisher Scient…	9.90:1	4.5:1	#000000	#B2B2B2	Pass
span Hamburger Menu Butto…	9.90:1	4.5:1	#000000	#B2B2B2	Pass
span Sign in	9.90:1	4.5:1	#000000	#B2B2B2	Pass
div Don't have an accoun…	9.90:1	4.5:1	#000000	#B2B2B2	Pass
a Create Account	1.99:1	4.5:1	#000000	#423C50	Fail
li Products	2.53:1	4.5:1	#000000	#484E60	Fail
a Antibodies	4.02:1	4.5:1	#000000	#6A6B7E	Fail
a Cell Culture Media	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Chemicals	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Chromatography Colum…	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Lab Equipment	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Lab Plasticware and …	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Microplates	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Oligos, Primers, Pro…	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a TaqMan Real-Time PCR…	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Greener Products	21.00:1	4.5:1	#000000	#FFFFFF	Pass

Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.

Lighthouse Accessibility Audits

Score 85/100 — 4 failing, 28 passed

REVIEW

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.

Names and labels

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#commerce-bar > ul.quick-menu > li.cart > a#cart-link `div#commerce-bar > ul.quick-menu > li.cart > a#cart-link`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div > div#dynamicOffer > div.entireClickable > a `div > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > a`
div#offerContent > div#dynamicOffer > div.entireClickable > a `div#offerContent > div#dynamicOffer > div.entireClickable > 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.

Best practices

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

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
head > meta `head > meta`

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Price & Freight Policy `div.footer-legal-list > ul.footer-legal-list > li > a#hfOnlinePricePolicyLink`
Cookie Preferences `ul.footer-legal-list > li > div#teconsent > a#icon-id03286745574740132`

These items highlight common accessibility best practices.

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
Fetal Bovine Serum, Value, bottle, 500 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
SYBR™ Safe DNA Gel Stain `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa, 2 x 250 μL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Pierce™ BCA Protein Assay Kit, 1 Kit (1 L) `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
MitoSOX™ Red Mitochondrial Superoxide Indicator, for live-cell imaging, 10 vial… `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Opti-MEM™ I Reduced Serum Medium, 500 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Pierce™ BCA Protein Assay Kit, 1 Kit (500 mL) `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
MEM Non-Essential Amino Acids Solution (100X), 100 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
RIPA Lysis and Extraction Buffer, 100 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
DPBS, no calcium, no magnesium, 500 mL bottle `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Lipofectamine™ 2000 Transfection Reagent, 15 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqMan™ Fast Advanced Master Mix for qPCR, 10 x 5 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Pierce™ Streptavidin Coated High Capacity Plates, Clear, 96-Well, 5 plates `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Quant-iT™ dsDNA Assay Kit, high sensitivity, 1 kit `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Custom TaqMan™ SNP Genotyping Assay, non-human, L (2400 reactions), made to ord… `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
SuperScript™ IV One-Step RT-PCR System with ezDNase™, 100 rxns `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqPath™ 1-Step RT-qPCR Master Mix, CG, 1 x 10 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Platinum™ SuperFi II DNA Polymerase, 5 x 500 reactions `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 5 x 1 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Viral Production Medium, 10 L `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
SuperScript™ IV First-Strand Synthesis System, Each `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Multidrop™ Combi Accessories, Small tube metal tip dispensing cassette `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Fetal Bovine Serum, Premium Plus, heat inactivated, 500 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqMan™ Universal PCR Master Mix (individually packaged), 10 x 5 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Fetal Bovine Serum, Value, heat inactivated, 500 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
DPBS, no calcium, no magnesium, 20 L bag `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 1 x 10 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Matrix™ 0.64 mL V-Bottom ScrewTop Tubes in Barcoded Latch Racks, Clear/Colorless `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
ExpiFectamine™ 293 Transfection Kit, For 50 L of culture `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
Pierce™ Streptavidin Magnetic Beads, 5 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TaqPath™ qPCR Master Mix, CG, 1 x 50 mL `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
DMEM, high glucose, pyruvate, 10 L `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
TMTpro™ 18-plex Label Reagent Set, 1 x 5 mg `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`
SuperScript™ II Reverse Transcriptase, 4 x 10,000 units `div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a`

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

●`[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

●`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.

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

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

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

●Uses ARIA roles only on compatible elements

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

●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

○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

○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

○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.

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

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

○All heading elements contain content.

○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.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.