Digital Accessibility

This category explains the standards, laws and techniques behind websites that everyone can use – regardless of impairments or assistive technology. Particularly relevant since the Accessibility Act (BaFG) became applicable in June 2025.

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Accessibility Act (BaFG) The Accessibility Act (BaFG) is Austria's implementation of the European Accessibility Act; it has applied since 28 …
Accessibility Overlays (Criticism of Overlay Widgets) Accessibility overlays are JavaScript widgets added on top of an existing website that claim to make it accessible …
Accessibility Statement An accessibility statement is a page documenting the current accessibility status of a digital service, its known …
Accessibility Testing Tools (axe, WAVE, Lighthouse) Accessibility testing tools such as axe, WAVE and Lighthouse are the best-known automated checkers for testing websites …
Accessible Authentication & CAPTCHA Alternatives Accessible authentication is the WCAG 2.2 requirement (success criterion 3.3.8, level AA) that a login or sign-up …
Accessible Forms Accessible forms are designed so that they can be operated entirely by keyboard, are understandable with screen readers …
Accessible Name The accessible name is the name under which a control reaches assistive technology: what a screen reader announces and …
Accessible PDFs An accessible PDF is tagged with a correct reading order, contains alternative text for images and holds real, …
Accessible SVG Accessible SVG means marking up scalable vector graphics so that assistive technology can interpret them: SVGs are …
Alt Attribute The alt attribute (alt) is an HTML attribute for images that provides alternative text, shown when an image fails to …
ARIA ARIA (Accessible Rich Internet Applications) is a set of HTML attributes used to describe the roles, states and …
aria-expanded aria-expanded tells assistive technology whether the region a control opens is currently expanded or collapsed. The …
aria-hidden aria-hidden="true" is a WAI-ARIA attribute that removes an element and all of its children from the accessibility tree, …
aria-label vs. aria-describedby aria-label and aria-describedby are both ARIA attributes, but they do different jobs: aria-label overrides or supplies …
ARIA Live Regions ARIA live regions are a mechanism from the WAI-ARIA specification that makes screen readers announce dynamic content …
Assistive Technologies Assistive technologies are hardware and software aids that enable people with disabilities to use digital content, …

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Focus Indicator A focus indicator is the visual marker showing which element currently holds keyboard focus, and it is essential for …

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inert attribute inert is a boolean HTML attribute. Where it is set, the element and all of its flat tree descendants become inert. The …

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Keyboard Navigation Keyboard navigation means that all interactive elements of a website – links, buttons, forms, menus – can be reached …

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Landmark regions (ARIA landmarks) Landmark regions are page areas marked up with WAI-ARIA roles such as banner, navigation, main and contentinfo, which …

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prefers-reduced-motion (CSS Media Query) prefers-reduced-motion is a CSS media query that lets websites read the operating system setting for reduced motion and …

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role Attribute The role attribute comes from the WAI-ARIA specification and assigns an HTML element a semantic role that assistive …

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WCAG The WCAG (Web Content Accessibility Guidelines) are the internationally recognised W3C guidelines for accessible web …