spec 1 linked patterns checked
WAI-ARIA APG Tree View Pattern
Defines tree view as a hierarchical list with expandable and collapsible items, single-select and multi-select models, focus distinct from selection, Right and Left Arrow expansion behavior, Up and Down movement, typeahead, aria-activedescendant support, aria-multiselectable, aria-selected or aria-checked state, labels, and dynamic-loading requirements for aria-level, aria-setsize, and aria-posinset.
Pattern Decisions This Source Supports
| Pattern | Supported decision | Required contract | Claim note |
|---|---|---|---|
| Tree selection | Choose tree selection when hierarchy is meaningful to the user's selection task and the parent-child relationship changes how options are found or interpreted. | The tree container has role tree and a visible label referenced by aria-labelledby or an accessible name. | APG defines tree view hierarchy, expansion, focus movement, single and multi-select behavior, focus versus selection, typeahead, aria-activedescendant, labels, and selected-state properties. |
Evidence Role
This source is treated as spec evidence. Use it to validate the decision rules above, not as a visual style reference.
Publisher: W3C Web Accessibility Initiative. Last checked: .