Accessibility in Blazor Dropdown Menu Component
4 Nov 20254 minutes to read
The Blazor Dropdown Menu 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 Dropdown Menu 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 | |
| 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 Blazor Dropdown Menu component follows relevant WAI-ARIA button and menu patterns to improve interoperability with assistive technologies. The following ARIA attributes are used in the Blazor Dropdown Menu component:
| Attributes | Purpose |
|---|---|
role |
Indicates the Dropdown Menu trigger as button, the Dropdown Menu popup as menu, and the dropdown popup items as menuitem. |
aria-haspopup |
Indicates the availability of the popup element. |
aria-expanded |
Indicates whether the popup can be expanded or collapsed and reflects its current state. |
aria-owns |
Identifies elements to define a visual, functional, or contextual parent/child relationship between DOM elements when the DOM hierarchy alone cannot represent the relationship. |
aria-disabled |
Indicates that the element is perceivable but disabled, so it is not editable or otherwise operable. |
Keyboard interaction
The Blazor 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 Blazor Dropdown Menu component.
| Windows | Mac | Actions |
|---|---|---|
| Esc | Esc | Closes the popup. |
| Enter | Enter | Opens the popup, or activates the highlighted item and closes the popup. |
| Space | Space | Opens the popup. |
| ↑ | ↑ | Navigates up or to the previous action item. |
| Alt + ↑ | ⌥ + ↑ | Closes the popup. |
| Alt + ↓ | ⌥ + ↓ | Opens the popup. |
Ensuring accessibility
The Blazor Drop down component’s accessibility levels are ensured through an axe-core with playwright tests.
The accessibility compliance of the Blazor Dropdown Menu component is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Blazor Dropdown Menu component with accessibility tools.