Accessibility in EJ2 TypeScript Drop down button control
24 Jan 20244 minutes to read
The Drop down button 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 Drop down button component 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 component meet the requirement.
- Some features of the component do not meet the requirement.
- The component does not meet the requirement.WAI-ARIA attributes
The Drop down button component followed the [WAI-ARIA] patterns to meet the accessibility. The following ARIA attributes are used in the Drop down button component:
| Attributes | Purpose |
|---|---|
role |
Indicates the Drop down button component as button, Drop down button popup as menu, and the dropdown popup action items as menuitem. |
aria-haspopup |
Indicates the availability of the popup element. |
aria-expanded |
Indicates whether the popup can be expanded or collapsed, as well as indicates whether its current state is expanded or collapsed. |
aria-owns |
Identifies an elements in order to define a visual, functional, or contextual parent/child relationship between DOM elements where the DOM hierarchy cannot be used to represent the relationship. |
aria-disabled |
Indicates that the element is perceivable but disabled, so it is not editable or otherwise operable. |
Keyboard interaction
The Dropdown button component followed the [keyboard interaction] guideline, making it easy for people who use assistive technologies (AT) and those who completely rely on keyboard navigation. The following keyboard shortcuts are supported by the Drop down button component.
| Press | To do this |
|---|---|
| Esc | Closes the popup. |
| Enter | Opens the popup, or activates the highlighted item and closes the popup. |
| Space | Opens the popup. |
| Up | Navigates up or to the previous action item. |
| Alt + Up Arrow | Closes the popup. |
| Alt + Down Arrow | Opens the popup. |
Ensuring accessibility
The Drop down component’s accessibility levels are ensured through an accessibility-checker and axe-core software tools during automated testing.
The accessibility compliance of the Drop down button component is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Drop down button component with accessibility tools.