Accessibility in Blazor TreeView Component
26 Oct 20222 minutes to read
The TreeView control has been designed keeping in mind the
WAI-ARIA specifications, and applies WAI-ARIA roles, states, and properties along with
keyboard support. This component is characterized by complete keyboard interaction support and ARIA accessibility support that makes it easy for people who use assistive technologies (AT) and those who completely rely on keyboard navigation.
The TreeView control uses the
tree role, and each tree parent node has a
group role where each node has
treeitem role. The following ARIA attributes are used in TreeView.
|aria-multiselectable||Indicates whether the TreeView enables multiple selection or not.|
|aria-expanded||Indicates whether the parent node has expanded or not.|
|aria-selected||Indicates the selected node.|
|aria-grabbed||Indicates the selected state on drag-and-drop of node.|
|aria-level||Indicates the level of node in TreeView.|
The TreeView functionalities can be interactive when keyboard shortcuts are used.
TreeView supports the following keyboard shortcuts.
|Arrow Up||Goes to the previous node.|
|Arrow Down||Goes to the next node.|
|Arrow Right||Expands the current node.|
|Arrow Left||Collapses the current node.|
|Home||Goes to the first node.|
|End||Goes to the last node.|
|F2||Edits the focused node.|
|Esc||Focuses out the edit state without saving the edited text.|
|Enter||Selects the focused node/saves the edited text.|
|Space||Checks the current node.|
|Ctrl + A||Selects all nodes.|