AdaptTable for Base UI

Tree data in Base UI

A tree grid is a different shape from a grouped table: the rows themselves nest, rather than being collected under synthetic headers. Compose tree() with getChildren or getParentId and it renders the hierarchy.

Children indent under their parent, a chevron opens and closes each branch, and arrow keys walk the tree the way a tree widget should. Expansion is part of the table's state, so it lives in the URL like everything else.

Sorting and filtering apply within the tree rather than flattening it. Moving a child under a new parent is a host callback on the row-reordering page — the table never rewrites your tree.

The branch toggle is a Base UI Button holding a caret that rotates on open, and the indent is the engine's logical padding on the cell.

The code

import { DataTable } from "@adapttable/base-ui";
import { tree } from "@adapttable/base-ui/tree";

export function Org({ people, columns }) {
  return (
    <DataTable
      data={people}
      columns={columns}
      rowKey={(row) => row.id}
      features={[
        tree({ getParentId: (row) => row.managerId, treeColumn: "name" }),
      ]}
      urlKey="org"
    />
  );
}

Install

pnpm add @adapttable/base-ui @adapttable/core @base-ui/react

The same feature in the other kits

• Tree data in Mantine — Rounded, friendly, filled controls
• Tree data in MUI — Material elevation, uppercase actions
• Tree data in Chakra — Soft teal, generous radius
• Tree data in Ant Design — Compact, tinted header, crisp
• Tree data in Radix — Radix Themes, iris accent
• Tree data in shadcn — Monochrome, ring focus
• Tree data in Tailwind — Unstyled — your own classes

More Base UI features

• Filtering in Base UI — Operators, an AND/OR tree, chips, and find in the same URL.
• Column management in Base UI — Show, hide, reorder, pin and resize — from a menu you did not write.
• Column groups in Base UI — Spanning headers that collapse to a stub, a kept child, or a custom cell.
• Row selection in Base UI — A set of ids that survives paging, with bulk actions over it.
• Rows in Base UI — Pin rows, merge cells, and a 3-dot menu for add and delete.
• Row reordering in Base UI — Flat, grouped and tree moves — keyboard, confirm, host writes.
• Inline cell editing in Base UI — Kit-native editors in the cell; every write goes through your handler.
• Row grouping in Base UI — Drag, keyboard and mobile grouping controls with live aggregation overrides.
• Aggregation in Base UI — Footer totals, pinned summaries, group aggregates — not data rows.
• Nested tables in Base UI — A real table under a row — same engine, own columns, own keys.
• Export and print in Base UI — Browser files or cancellable server jobs — CSV, XLSX and PDF.
• Row and column virtualization in Base UI — 100k rows, 40 columns, virtualized rows and columns, sticky chrome.
• Mobile cards in Base UI — Every row becomes a card on phones. Automatically, with the same state.
• Pivot tables in Base UI — Rows down the side, dimensions across the top, subtotals at every level.
• Saved views in Base UI — Name an arrangement, share it as a link, manage the list in place.
• Spreadsheet formulas in Base UI — ROUND, POWER, SQRT, IF — computed columns, errors in the cell.
• Right-to-left Base UI data table — Arabic strings, a flipped axis, and a popover that opens from the right edge.
• Live updates in Base UI — Rows change while you read them. Sort and selection hold.
• Accessible Base UI data table — Arrow-key focus, a visible ring, forced-colors, and live announcements.
• AI table assistant in Base UI — Native assistant, feature-aware prompts and governed action receipts.

Reference: tree-data. More of this kit: AdaptTable for Base UI, or the live demo.