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Blazor TreeView Accessibility

The Telerik UI for Blazor TreeView is WCAG 2.1 AAA and Section 508 compliant. The component also follows the WAI-ARIA best practices for implementing the keyboard navigation for its component role, and is tested against the popular screen readers.

Wai-Aria

Selector Attribute Usage
.k-treeview role=tree The root div element of the treeview.
.k-treeview-group:not(.k-treeview-lines) role=group The ul element that wraps child nodes.
.k-treeview-item role=treeitem The li element rendered for a tree node.
aria-level Announces the level of the tree node item. The value of level is number-based(>=1).
aria-setsize Announces the total count of the items at this level. Helps the user understand the position of the navigation (ex: item 3 of 14).
aria-expanded=true/false Announces the expanded state of the node. It is true when expanded, and false when collapsed.
aria-selected=true Rendered only when selection is enabled and announces the selected state of the node.
aria-checked=true/false Rendered only when checkboxes are enabled and announces the checked state of the node. If the checkbox is indeterminate, the value is mixed.
.k-checkbox role=none/presentation Added to the wrapper element of the checkbox to prevent duplicated information announced to the user. The checked state is controlled by aria-checked.
aria-hidden=true Added to the checkbox element to prevent duplicated information announced to the user. The checked state is controlled by aria-checked.

If the tree supports Load More functionality, the load more button is rendered as li.k-treeview-item element and has role="button". The list item does not implement any of the above attributes.

Resources

ARIA practices File Directory Treeview Example

Section 508

The TreeView is compliant with the Section 508 requirements

Testing

The component has been extensively tested automatically with static code analyzers and manually with the most popular screen readers.

Any Accessibility Issues could be reported in Telerik Support System.

Screen Readers

Environment Tool
Firefox NVDA
Chrome JAWS
Microsoft Edge JAWS

See Also

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