AdaptTable for ng-bootstrap

Tree data in ng-bootstrap

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 and a ng-bootstrap chevron control in the tree column opens and closes each branch. Give hasChildren and onLoadChildren and a branch fetches its children as it opens, showing that it is loading; a failed fetch closes it again, so the next click retries.

On a phone each card leads with the same chevron and indents by depth. Sorting reorders each branch in place, and a search shows the rows it matches.

The code

import { Component, input } from "@angular/core";
import type { ColumnDef } from "@adapttable/angular";
import { AdaptDataTable } from "@adapttable/ng-bootstrap";
import { tree } from "@adapttable/ng-bootstrap/tree";

interface Employee {
  id: string;
  name: string;
  team: string;
  managerId?: string;
}

const columns: ColumnDef<Employee>[] = [{ key: "name" }, { key: "team" }];

@Component({
  selector: "app-org",
  imports: [AdaptDataTable],
  template: `
    <adapt-data-table
      [data]="people()"
      [columns]="columns"
      [rowKey]="rowKey"
      [features]="features"
    />
  `,
})
export class Org {
  readonly people = input.required<readonly Employee[]>();
  readonly columns = columns;
  readonly rowKey = (row: Employee) => row.id;
  readonly features = [
    tree<Employee>({ getParentId: (row) => row.managerId, treeColumn: "name" }),
  ];
}

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

• Tree data in Unstyled — Native elements — your own CSS
• Tree data in NG-ZORRO — Ant Design components for Angular
• Tree data in Angular Material — Material surfaces, native controls
• Tree data in Angular Aria — Accessible behavior, precise styling
• Tree data in ngx-bootstrap — Bootstrap controls and overlays
• Tree data in Angular CDK — CDK behavior, a neutral theme
• Tree data in Spartan — Sharp borders, subtle elevation
• Tree data 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.
• Column groups in ng-bootstrap — Spanning headers that collapse to a stub, a kept child, or a custom cell.
• 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.
• 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: tree-data. More of this kit: AdaptTable for ng-bootstrap, or the live demo.