Accessibility in EJ2 TypeScript Carousel control
13 Dec 20245 minutes to read
The JavaScript Carousel control has been designed, keeping in mind the WAI-ARIA specifications, and applying the WAI-ARIA roles, states and properties along with keyboard support for people who use assistive devices. WAI-ARIA accessibility support is achieved through attributes like aria-roledescription, aria-label, aria-current, aria-live, aria-role and aria-hidden. It provides information about elements in a document for assistive technology. The control implements keyboard navigation support by following the WAI-ARIA practices and has been tested in major screen readers.
The accessibility compliance for the Carousel control is outlined below.
| Accessibility Criteria | Compatibility |
|---|---|
| WCAG 2.2 Support |  |
| Section 508 Support | |
| Screen Reader Support | |
| Right-To-Left Support | |
| Color Contrast | |
| Mobile Device Support | |
| Keyboard Navigation Support | |
| Accessibility Checker Validation | |
| Axe-core Accessibility Validation | |
- All features of the control meet the requirement.
- Some features of the control do not meet the requirement.
- The control does not meet the requirement.ARIA attributes
The Carousel control 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.
| Roles and Attributes | Functionalities |
|---|---|
| aria-roledescription | The role description attribute has been 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 has been grouped. |
Keyboard interaction
All Carousel actions can be controlled using keyboard keys through the allowKeyboardInteraction property, which is enabled by default. If you wish to disable the default keyboard interactions, you can set this property to false. This is particularly useful if the carousel contains input elements, as pressing the arrow keys might cause the carousel to move unexpectedly. By disabling keyboard interaction, the carousel remains static, allowing the user to focus on the input fields without any interruptions.
This control implements keyboard navigation support by following WAI-ARIA practices. Once focused on the active Carousel element, you can use the following key combinations to interact with the Carousel.
| Key | Description |
|---|---|
| Alt + J | Keys to focus the Carousel control (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. |
| Tab | To Move focus through the interactive elements. |
| Shift + Tab | To Move focus through the interactive elements. |
Ensuring accessibility
The Carousel control accessibility levels are ensured through an accessibility-checker and axe-core software tools during automated testing.
The accessibility compliance of the Carousel control is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Carousel control with accessibility tools.