> ## Documentation Index
> Fetch the complete documentation index at: https://neo.tvk.company/llms.txt
> Use this file to discover all available pages before exploring further.
# Checkbox
> A selection control that allows users to toggle between checked and unchecked states, with support for labeling.
## Examples
```dart Unchecked lines theme={null}
NeoCheckbox(
isChecked: false,
onChanged: (value) {
// Handle state change
},
),
```
```dart Checked lines theme={null}
NeoCheckbox(
isChecked: true,
onChanged: (value) {
// Handle state change
},
),
```
```dart Indeterminate lines theme={null}
NeoCheckbox(
isChecked: false,
isIndeterminate: true,
onChanged: (value) {
// Handle state change
},
),
```
```dart With Label lines theme={null}
NeoCheckbox(
isChecked: false,
label: "I accept the terms and conditions",
onChanged: (value) {
// Handle state change
},
),
```
```dart With Description lines theme={null}
NeoCheckbox(
isChecked: true,
label: "Email notifications",
description: "Receive updates about your account activity and important announcements",
onChanged: (value) {
// Handle state change
},
),
```
## Properties
### Required
The current checked state of the checkbox. `true` represents checked, `false` represents unchecked.
Callback function called when the checkbox state changes. Receives the new boolean value.
### Content
The text label displayed next to the checkbox.
Additional descriptive text displayed below the label. Useful for providing context or additional information about the option.
### State
Whether the checkbox is in an indeterminate state. When true, displays a minus icon regardless of the `isChecked` value. Commonly used for "select all" checkboxes when only some items are selected.
Whether the checkbox is interactive. When false, the checkbox appears with reduced opacity and doesn't respond to user interactions.
## Best Practices
* Combine with [`NeoHaptics`](/utilities/haptics) in the `onChanged` callback for enhanced user experience on supported devices.
## Integration Notes
* When a `label` and/or `description` is provided, the entire area is clickable, not just the checkbox itself.