# React Data Grid Column Pinning

> Freeze React 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` on its own to enable the feature and
pin later through the headless table (`tableRef.current?.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.

```html
import { CDataGrid } from '@coreui/react-data-grid'
import { useMemo } from 'react'

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']

export const DataGridPinningExample = () => {
  const items = useMemo(
    () =>
      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]
      })),
    []
  )

  return (
    <CDataGrid
      columns={[
        { 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,
          render: item => (
            <button
              type="button"
              className="btn btn-sm btn-outline-primary"
              onClick={() => alert(`Edit ${item.firstName} (#${item.id})`)}
            >
              Edit
            </button>
          )
        }
      ]}
      items={items}
      itemKey={item => String(item.id)}
      columnPinning={{ left: ['id'], right: ['actions'] }}
      rowSelection
      pagination={{ pageSize: 10 }}
    />
  )
}
```

## 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 calls `onPinningChange` with the grid's `columnPinning` state.
Reordering via [column ordering](https://coreui.io/data-grid/react/docs/columns/ordering-visibility/) never crosses a
pinning boundary.