Accessibility in Blazor Accordion Component
29 Nov 20244 minutes to read
The Blazor Accordion component has been designed keeping in mind the WAI-ARIA specifications, by applying the prompt WAI-ARIA roles, states and properties along with the keyboard support. Thus, making it usable for people who use assistive WAI-ARIA Accessibility supports that is achieved through the attributes like aria-labelledby. 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 Accordion 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 Accordion 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
| Attributes | Purpose |
|---|---|
| role |
Button: Attribute is set to the Accordion header elements to indicate that the element can be used to toggle the visibility of the associated content section, describing the actual role of the element. Region: Attribute is set to the Accordion panel elements to create a landmark region that contains the currently expanded accordion panel, describing the actual role of the element. |
| aria-labelledby | Attribute is set to content (panel) and it points to the corresponding Accordion header. |
| aria-controls | Attribute is set to the header and it points to the corresponding Accordion content. |
| aria-expanded | Attribute is set to the Accordion header elements to indicates the expand state of the Accordion Item. Default value of this attribute is false. If an item is expanded, the attribute value changes to ‘true’. |
| aria-hidden | Attribute is set to the Accordion panel elements to indicates the content visible state of the Accordion Item. Default value of this attribute is true. If an item content is visible, the attribute value changes to false. |
| aria-disabled | It indicates the disabled state of the Accordion and its items. |
Keyboard interaction
Keyboard navigation is enabled by default. The possible keys are:
| Key | Description |
|---|---|
| Space or Enter | When the focus is on the Accordion header, clicking on the focused element makes the element to expand and collapse. |
| Down Arrow | Focus the next Accordion header. |
| Up Arrow | Focus the previous Accordion header. |
| Home | Focus the first Accordion header. |
| End | Focus the last Accordion header. |
Ensuring accessibility
The Blazor Accordion component’s accessibility levels are ensured through an axe-core software tool during automated testing.
The accessibility compliance of the Accordion component is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Accordion component with accessibility tools.