AdaptTable for ng-bootstrap

Column groups in ng-bootstrap

A parent with children is a column group: its caption spans its columns in a header row of its own. This table has three, open by default; collapse one to see how it folds.

Assignment is Team + Status with collapsedKey: "team", so it keeps Team. Delivery is Timeline + Budget with collapsedRender, so it draws the budget in one cell. Workload has neither, so it folds to a narrow stub.

collapsibleColumnGroups arms the toggles. The group headers use ng-bootstrap buttons.

The code

import { Component, input } from "@angular/core";
import type { ColumnInput } from "@adapttable/angular";
import { AdaptDataTable } from "@adapttable/ng-bootstrap";
import { collapsibleColumnGroups } from "@adapttable/ng-bootstrap/column-groups";

interface Member {
  id: string;
  name: string;
  team: string;
  status: string;
  budget: number;
}

const columns: ColumnInput<Member>[] = [
  { key: "name", header: "Name" },
  {
    header: "Assignment",
    collapsedKey: "team",
    children: [
      { key: "team", header: "Team" },
      { key: "status", header: "Status" },
    ],
  },
  {
    header: "Budget",
    collapsedRender: (row) => `$${row.budget}`,
    children: [{ key: "budget", header: "Amount" }],
  },
];

@Component({
  selector: "app-members",
  imports: [AdaptDataTable],
  template: `
    <adapt-data-table
      [data]="rows()"
      [columns]="columns"
      [rowKey]="rowKey"
      [features]="features"
    />
  `,
})
export class Members {
  readonly rows = input.required<readonly Member[]>();
  readonly columns = columns;
  readonly rowKey = (row: Member) => row.id;
  readonly features = [collapsibleColumnGroups()];
}

Install

# Follow the kit setup guide for compatible peers
pnpm add @adapttable/ng-bootstrap @adapttable/angular @ng-bootstrap/ng-bootstrap@21.0.0 @popperjs/core@2.11.8 @angular/forms@^22 @angular/localize@^22 rxjs@^7.4.0

The same feature in the other kits

• Column groups in Unstyled — Native elements — your own CSS
• Column groups in NG-ZORRO — Ant Design components for Angular
• Column groups in Angular Material — Material surfaces, native controls
• Column groups in Angular Aria — Accessible behavior, precise styling
• Column groups in ngx-bootstrap — Bootstrap controls and overlays
• Column groups in Angular CDK — CDK behavior, a neutral theme
• Column groups in Spartan — Sharp borders, subtle elevation
• Column groups in Taiga UI — Soft surfaces, expressive controls

More ng-bootstrap features

• Filtering in ng-bootstrap — Ranges, selects, an AND/OR tree and chips — all in the URL.
• Column management in ng-bootstrap — Show, hide, reorder, pin and resize — from a menu you did not write.
• Row selection in ng-bootstrap — A set of ids that survives paging, with bulk actions over it.
• Rows in ng-bootstrap — Pin rows from a 3-dot menu, and merge a team that runs down the page.
• Row reordering in ng-bootstrap — Drag or keyboard moves, announced — the host writes.
• Inline cell editing in ng-bootstrap — Native editors in the cell; every write goes through your handler.
• Row grouping in ng-bootstrap — Drag, select or keyboard grouping, with totals in the headers.
• Aggregation in ng-bootstrap — Footer totals, pinned summaries, group aggregates — not data rows.
• Nested tables in ng-bootstrap — A real table under a row — same engine, own columns, own keys.
• CSV export in ng-bootstrap — One toolbar button, a CSV of the table as it stands.
• Row and column virtualization in ng-bootstrap — 40,000 rows in a scroll box, only the visible ones rendered.
• Tree data in ng-bootstrap — Nesting, chevrons, lazy children, and a tree on phones.
• Mobile cards in ng-bootstrap — Every row becomes a card on phones. Automatically, with the same state.
• Pivot tables in ng-bootstrap — Rows down the side, dimensions across the top, subtotals at every level.
• Saved views in ng-bootstrap — Name an arrangement and restore it from the menu.
• Spreadsheet formulas in ng-bootstrap — ROUND, POWER, SQRT, IF — computed columns, errors in the cell.
• Right-to-left ng-bootstrap data table — Arabic strings, a flipped axis, and a popover that opens from the right edge.
• Live updates in ng-bootstrap — Rows change while you read them. Sort and selection hold.
• Accessible ng-bootstrap data table — Arrow-key focus, a visible ring, forced-colors, and live announcements.
• AI table assistant in ng-bootstrap Angular — Local sort, questions and approved edits with real table outcomes.

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