DropDownTree Accessibility
Out of the box, the Kendo Vue DropDownTree provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.
The DropDownTree is compliant with the Web Content Accessibility Guidelines (WCAG) 2.2 AA standards](https://www.w3.org/TR/WCAG21/) and Section 508 requirements, follows the Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA) best practices for implementing the keyboard navigation for its component role, provides options for managing its focus and is tested against the most popular screen readers.
WAI-ARIA
The following table lists the selectors, attributes, and behavior patterns supported by the DropDownTree component:
DropDownTree wrapper
| Selector | Attribute | Usage |
|---|---|---|
| .k-dropdowntree | role=combobox | Announces the button dropdown element. |
label for or aria-label or aria-labelledby | The input needs an accessible name to be assigned to it. | |
aria-haspopup=tree | Indicates the presence of a popup with tree navigation. | |
aria-expanded=true/false | Announces the state of the visibility of the popup. | |
aria-controls=.k-treeview id | Points to the treeview element. Signifies that the combobox element controls the treeview. | |
aria-describedby=.k-input-inner id | Announces the selected value of the dropdown. | |
aria-readonly=true | Attribute is rendered only when the dropdown is readonly. | |
aria-autocomplete=list | Attribute is rendered and value is set to list when filtering feature is enabled. | |
aria-invalid=true | Attribute is rendered only when the dropdown is in form and announces the valid state of the component. | |
aria-busy=true | Attribute is rendered only when the dropdown is loading data. | |
tabindex=0 | The element should be focusable. | |
| .k-dropdowntree.k-disabled | aria-disabled=true | Attribute is rendered only when the dropdown is disabled. |
| .k-input-button | role=button or nodeName=button | The element should either be a <button> element or should have role="button" assigned. |
aria-label | The button needs an accessible name to be assigned to it. | |
tabindex=-1 | Button element should not be focusable. |
Resources
ARIA practices: Select-Only Combobox Example
Popup
| Selector | Attribute | Usage |
|---|---|---|
| .k-animation-container | role=region | When the component container is appended to the <body> element of the document, it needs a landmark role to be assigned to it. Otherwise, it should be appended to an element with an appropriate landmark role. |
aria-label or aria-labelledby | Provides a label when the container has a region role assigned. |
TreeView
The Tree placed in the Popup element of the component should implement the specification for a TreeView component.
TreeView accessibility specification
Resources
ARIA practices: TreeView Example
Section 508
The DropDownTree is fully compliant with the Section 508 requirements.
Testing
The DropDownTree has been extensively tested automatically with static code analyzers and manually with the most popular screen readers.
To report any accessibility issues, contact the team through the Telerik Support System.
Screen Readers
The following table lists the screen readers supported by the DropDownTree:
| Environment | Tool |
|---|---|
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |
