Accessibility in Blazor Carousel Component

27 Mar 20244 minutes to read

The Blazor Carousel component has been designed, keeping in mind the WAI-ARIA specifications, and applying the WAI-ARIA roles, states and properties along with keyboard support. Thus, making it usable for people who use assistive WAI-ARIA accessibility supports that is achieved through attributes like aria-label, aria-current, aria-live, aria-role and aria-hidden. It helps to provides information about the elements in a document for assistive technology. The component implements the keyboard navigation support by following the WAI-ARIA practices and tested in major screen readers.

The Blazor Carousel component followed the accessibility guidelines and standards, including ADA, Section 508, WCAG 2.2 standards, and WCAG roles that are commonly used to evaluate accessibility.

The accessibility compliance for the Blazor Carousel component is outlined below.

Accessibility Criteria Compatibility
WCAG 2.2 Support Yes
Section 508 Support Yes
Screen Reader Support Yes
Right-To-Left Support Yes
Color Contrast  
Mobile Device Support  
Keyboard Navigation Support Yes
Axe-core Accessibility Validation Yes
Yes - All features of the component meet the requirement.
Partial - Some features of the component do not meet the requirement.
No - The component does not meet the requirement.

WAI-ARIA attributes

The Blazor carousel component is designed by considering WAI-ARIA standard. Carousel is supported with ARIA Accessibility which is accessible by on-screen readers and other assistive technology devices. The following list of attributes is added to the Carousel.

Attributes Purpose
aria-roledescription The role description attribute should be added for the root element (carousel) and each carousel slide item (slide).
aria-label Previous, next and play/pause buttons and all indicator elements.
aria-current For the active item indicator element, aria-current is set to true.
aria-hidden For all carousel elements except the currently visible item, aria-hidden is set to true.
aria-live For carousel items element, when autoPlay is true, aria-live is set to off; when autoPlay is false, aria-live is set to polite.
aria-role For carousel slide item, aria-role should be group.

Keyboard interaction

By default, keyboard navigation is enabled. This component implements keyboard navigation support by following the WAI-ARIA practices. Once focused on the active Carousel element, you can use the following key combination for interacting with the Carousel.

Key Description
Alt + J Keys to focus the carousel component (done at application end).
Arrows Keys to navigate between slides.
Home To navigate to the first slide.
End To navigate to the last slide.
Space To play/pause the slide transitions.
Enter To perform the respective action on its focus.

Ensuring accessibility

The Blazor Carousel component’s accessibility levels are ensured through an axe-core software tool during automated testing.

The accessibility compliance of the Carousel component is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Carousel component with accessibility tools.

See also