TreeView
TreeView + TreeNode — pattern.
patterns-treeview--defaultOpen all variants →
When to use
- File / folder browsers, dataset hierarchies, label taxonomies, organisation charts.
- Nested data where the user benefits from collapsing / expanding sub-branches.
- When parent → child structure carries meaning (a flat list wouldn't read).
When not to use
- Flat list with no nesting → use `StructuredList` or a plain
<ul>. - Multi-select hierarchy (checkboxes on every node) → roll your own; TreeView ships single-select only today.
- Heavy data-grid with sort / filter — even hierarchical → `DataTable` with row grouping.