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.
Read with a purpose
What this source can teach
Use this source to check a technical or accessibility requirement against its exact wording and scope.
- Start with the original. Open the source and find the guidance or example relevant to your task.
- Trace the connection. Use the claim notes below to see how this site applies the source to specific patterns.
- Check the setting. Compare the source's platform, people, and constraints with your own decision.
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. Its value comes from the specific claims and setting described above.
Publisher: W3C Web Accessibility Initiative. Last checked: .