> For the complete documentation index, see [llms.txt](https://docs.grid.glideapps.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.grid.glideapps.com/api/cells/booleancell.md).

# BooleanCell

Renders a quad-state checkbox.

```typescript
export interface BooleanCell extends BaseGridCell {
    readonly kind: GridCellKind.Boolean;
    readonly data: boolean | BooleanEmpty | BooleanIndeterminate;
    readonly readonly?: boolean;
    readonly allowOverlay: false;
    readonly maxSize?: number;
}
```

### data

Determines if the boolean cell is checked, unchecked, or empty.

### readonly

Determines if the cell will accept edit events.

### maxSize

Controls the maximum size the checkbox will become. So long as this is smaller that the cell size this will also represent the final size of the checkbox.