No accessibility annotations are needed for a tree view, but keep these considerations in mind if you are modifying Carbon or creating a custom component.
What Carbon provides
Carbon bakes keyboard operation into its components, improving the experience of blind users and others who operate via the keyboard. Carbon incorporates many other accessibility considerations, some of which are described below.
The tree view takes a single tab stop, with focusing landing on the selected
node or the first node of an unselected tree. When trees have focus, arrow keys
provide navigation. The
Right arrow key expands a closed branch node. If a
branch is open, the
Right arrow moves into the first child node. Pressing the
Left arrow key on an open branch collapses it. Left arrowing on a child moves
the focus to the parent branch.
Down arrow keys move vertically
through open branches and their child nodes. A node or branch is selected by
Keep these considerations in mind if you are modifying Carbon or creating a custom component.
- The component uses a
treerole on a
ulwith all nodes in
ligiven a role of
aria-selected="false"(except the currently selected node).
- All branch nodes contain an
- See the ARIA authoring practice Tree View pattern for more considerations.