# Angular Data Grid Column Pinning

> Freeze Angular Data Grid columns to the left or right edge so they stay visible while the rest of the grid scrolls horizontally.

Keep an identifier or an actions column in view while users scroll a wide grid
sideways. Pinning freezes columns against the left or right edge with sticky
positioning; everything else scrolls between them.

## Column pinning

Freeze columns against the left or right edge with
`[columnPinning]="{ left, right }"` — they stay put while the rest of the grid
scrolls horizontally. Pass `[columnPinning]="true"` on its own to enable the
feature and pin later through `grid.table.setColumnPinning(...)`. When a column
is pinned left and selection is on, the checkbox column travels with it. The
last left and first right column cast a shadow over the scrolling content.

Pinning physically moves the column to its edge — the rendered order is always
left-pinned, center, right-pinned.

```ts
import { Component } from '@angular/core'
import { DataGridCellDirective, DataGridComponent } from '@coreui/angular-data-grid'
import type { DataGridColumn, DataGridItem } from '@coreui/angular-data-grid'

const firstNames = ['Alice', 'Bob', 'Carol', 'Dave', 'Eve', 'Frank', 'Grace', 'Heidi', 'Ivan', 'Judy']
const lastNames = ['Smith', 'Jones', 'Brown', 'Taylor', 'Wilson', 'Davies', 'Evans', 'Thomas']
const countries = ['Poland', 'Germany', 'France', 'Spain', 'Italy']

@Component({
  selector: 'docs-data-grid-pinning-example',
  imports: [DataGridCellDirective, DataGridComponent],
  template: `
    <c-data-grid
      [columns]="columns"
      [items]="items"
      [itemKey]="itemKey"
      [columnPinning]="{ left: ['id'], right: ['actions'] }"
      [rowSelection]="true"
      [pagination]="{ pageSize: 10 }"
    >
      <ng-template cDataGridCell="actions" let-item>
        <button type="button" class="btn btn-sm btn-outline-primary" (click)="edit(item)">Edit</button>
      </ng-template>
    </c-data-grid>
  `
})
export class DataGridPinningExample {
  readonly columns: DataGridColumn[] = [
    { key: 'id', label: '#', width: 80 },
    { key: 'firstName', label: 'First name', width: 160 },
    { key: 'lastName', label: 'Last name', width: 160 },
    { key: 'email', label: 'Email', width: 260 },
    { key: 'country', label: 'Country', width: 200 },
    {
 key: 'actions', label: '', sortable: false, width: 120
}
  ]
readonly items: DataGridItem[] = Array.from({ length: 1000 }, (_, i) => ({
    id: i + 1,
    firstName: firstNames[i % firstNames.length],
    lastName: lastNames[i % lastNames.length],
    email: `${firstNames[i % firstNames.length].toLowerCase()}${i}@example.com`,
    country: countries[i % countries.length]
  }))
readonly itemKey = (item: DataGridItem) => String(item.id)

  edit(item: DataGridItem) {
    alert(`Edit ${item.firstName} (#${item.id})`)
  }
}
```

## Options

| Option | Type | Default | Description |
| --- | --- | --- | --- |
| `columnPinning` | `boolean \| { left?: string[], right?: string[] }` | `false` | Freezes columns (by `key`) to the left/right edge. `true` enables the feature with no initial pins. |

Pinning emits the `pinningChange` output with the grid's `{ columnPinning }`
state. Reordering via
[column ordering](https://coreui.io/data-grid/angular/docs/columns/ordering-visibility/) never crosses a pinning
boundary.