AdaptTable for Base UI

Column groups in Base UI

A parent with children is a column group. This table has three, two children each, open by default. Collapse one to see its mode. Actions stays ungrouped at the end.

Contact is Name + Role with no collapse options: fold is the chevron. Assignment is Team + Status with collapsedKey: "team". Delivery is Timeline + Budget with collapsedRender ($25,300 for 35 days) and align: "start".

collapsibleColumnGroups arms the toggles. The headers and the chevrons are Base UI.

A group header is a centred Base UI ColumnHeaderCell spanning its children, with a Base UI Button chevron; a collapsed stub keeps the name on the control.

The code

import { DataTable, type ColumnInput } from "@adapttable/base-ui";

const columns: ColumnInput<Person>[] = [
  {
    header: "Contact",
    children: [
      { key: "name", header: "Name" },
      { key: "role", header: "Role" },
    ],
  },
  {
    header: "Assignment",
    collapsedKey: "team",
    children: [
      { key: "team", header: "Team" },
      { key: "status", header: "Status" },
    ],
  },
  {
    header: "Delivery",
    align: "start",
    collapsedRender: (row) => row.budget + " for 35 days",
    children: [
      { key: "timeline", header: "Timeline" },
      { key: "budget", header: "Budget" },
    ],
  },
];

export function People({ rows }) {
  return (
    <DataTable
      data={rows}
      columns={columns}
      rowKey={(row) => row.id}
      collapsibleColumnGroups
    />
  );
}

Install

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

The same feature in the other kits

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

More Base UI features

• Filtering in Base UI — Kit-native operators, date ranges, checklists, an AND/OR tree, chips.
• Column management in Base UI — Show, hide, reorder, pin and resize — from a menu you did not write.
• Row selection in Base UI — A set of ids that survives paging, with bulk actions over it.
• Rows in Base UI — Pin, drag-reorder, merge cells, and a 3-dot menu per row.
• Inline cell editing in Base UI — Kit-native editors in the cell; every write goes through your handler.
• Row grouping in Base UI — Nested group headers with counts, subtotals, footers and collapse state.
• Nested tables in Base UI — A real table under a row — same engine, own columns, own keys.
• Export and print in Base UI — CSV, XLSX and PDF from one seam — plus a real print layout.
• Large datasets in Base UI — 100k rows, 40 columns, virtualized rows and columns, sticky chrome.
• Tree data in Base UI — Rows that contain rows — nesting, chevrons, keyboard traversal.
• 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 — Computed columns typed as formulas, errors reported 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, and every announcement shown as text.

Reference: column-groups, columns. More of this kit: AdaptTable for Base UI, or the live demo.