Tree View
A tree view is a list with levels. Parent rows open or close to show the child items inside them.
Product
- Research
- Prototype
- Production
A real example
A file browser opens src to show components. Keyboard focus stays on the active row.
Main parts
- 01Current location
- 02Destination labels
- 03Focus order
- 04Responsive behavior
Use it when
Use it for compact navigation or selection when the levels have a clear meaning.
Do not use it when
Avoid it when there are few levels or when levels change often. Separate pages may be easier to understand.
Name used in code
role="tree" / role="treeitem" Before you ship
Before release, check the page structure, keyboard access, visible focus, contrast, and zoom. Also check loading, empty, error, success, cancel, and reduced-motion states.
Outcome: Use Tree View to solve this user need without losing the current context. User context: A file browser opens src to show components. Keyboard focus stays on the active row. Recommended pattern: Tree View. Why it fits: Use it for compact navigation or selection when the levels have a clear meaning. Do not use it when: Avoid it when there are few levels or when levels change often. Separate pages may be easier to understand. Product requirements: Define the default, loading, empty, error, success, and recovery states. Keep user input. Give clear feedback after every action. Accessibility and resilience: Use semantic HTML, full keyboard access, and visible focus. Make the layout work when zoomed and support reduced motion. Follow the project’s current rules. Do not add a new UI library unless the project already uses it. Acceptance criteria: The main task works with keyboard only and at 320px width. Focus and status changes are announced. Check loading, failure, retry, cancel, and reduced-motion paths. Evidence and limits (evidence boundary): The standard covers only the listed scope. It does not choose the visual style, product decision, or Vibulary example. Unknowns to confirm: Product wording, data source, analytics events, supported devices and languages, and platform limits.
Check this request
Review the current use of Tree View. Definition: A tree view is a list with levels. Parent rows open or close to show the child items inside them. Release checks: Before release, check the page structure, keyboard access, visible focus, contrast, and zoom. Also check loading, empty, error, success, cancel, and reduced-motion states. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.