# DatePicker
The **DatePicker** component allows users to select a date from the given range.
> **NOTE**
>
> This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
## Child Components
Not supported
## APIs
DatePicker(options?: DatePickerOptions)
Creates a date picker in the given date range.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name | Type | Mandatory| Description |
| ------- | ----------------------------------------------- | ---- | -------------------------- |
| options | [DatePickerOptions](#datepickeroptions) | No | Parameters of the date picker.|
## DatePickerOptions
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
| Name | Type| Mandatory| Description |
| -------- | ---- | ---- | ------------------------------------------------------------ |
| start | Date | No | Start date of the picker.
Default value: **Date('1970-1-1')** |
| end | Date | No | End date of the picker.
Default value: **Date('2100-12-31')** |
| selected | Date | No | Date of the selected item.
Default value: current system date
Since API version 10, this parameter supports two-way binding through [$$](../../../quick-start/arkts-two-way-sync.md).|
**Handling in the case of exceptions**
| Exception | Result |
| -------- | ------------------------------------------------------------ |
| The start date is later than the end date, and the selected date is not set. | The start date, end date, and selected date are set to the default values. |
| The start date is later than the end date, and the selected date is earlier than the default start date. | The start date and end date are set to the default values, and the selected date is set to the default start date. |
| The start date is later than the end date, and the selected date is later than the default end date. | The start date and end date are set to the default values, and the selected date is set to the default end date. |
| The start date is later than the end date, and the selected date is within the range of the default start date and end date. | The start date and end date are set to the default values, and the selected date is set to the specified value.|
| The selected date is earlier than the start date. | The start date is set to the selected date. |
| The selected date is later than the end date. | The selected date is set to the end date. |
| The start date is later than the current system date, and the selected date is not set. | The start date is set to the selected date. |
| The end date is earlier than the current system date, and the selected date is not set. | The end date is set to the selected date. |
| The set date is in invalid format, for example, **'1999-13-32'**. | The default value is used. |
| The start date or end date is earlier than the earliest date in the valid date range. | The start date or end date is set to the default state date.|
| The start date or end date is later than the latest date in the valid date range. | The start date or end date is set to the default end date.|
| Both the start date and end date are earlier than the earliest date in the valid date range.| The start date and end date are set to the earliest date in the valid date range.|
| Both the start date and end date are later than the latest date in the valid date range.| The start date and end date are set to the latest date in the valid date range.|
The valid date range is from 1900-1-31 to 2100-12-31.
The exception detection and handling with the selected date comes after that with the start date and end date.
## Attributes
In addition to the [universal attributes](ts-universal-attributes-size.md), the following attributes are supported.
### lunar
lunar(value: boolean)
Specifies whether to display the lunar calendar.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type | Mandatory| Description |
| ------ | ------- | ---- | ------------------------------------------------------------ |
| value | boolean | Yes | Whether to display the lunar calendar.
- **true**: Display the lunar calendar.
- **false**: Do not display the lunar calendar.
Default value: **false**|
### disappearTextStyle10+
disappearTextStyle(value: PickerTextStyle)
Sets the text style for the top and bottom items.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type | Mandatory| Description |
| ------ | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| value | [PickerTextStyle](#pickertextstyle10) | Yes | Font color, font size, and font weight of the top and bottom items.
Default value:
{
color: '#ff182431',
font: {
size: '14fp',
weight: FontWeight.Regular
}
} |
### textStyle10+
textStyle(value: PickerTextStyle)
Sets the text style for all items except the top, bottom, and selected items.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type | Mandatory| Description |
| ------ | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| value | [PickerTextStyle](#pickertextstyle10) | Yes | Font color, font size, and font weight of all items except the top, bottom, and selected items.
Default value:
{
color: '#ff182431',
font: {
size: '16fp',
weight: FontWeight.Regular
}
} |
### selectedTextStyle10+
selectedTextStyle(value: PickerTextStyle)
Sets the text style for the selected item.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type | Mandatory| Description |
| ------ | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| value | [PickerTextStyle](#pickertextstyle10) | Yes | Font color, font size, and font weight of the selected item.
Default value:
{
color: '#ff007dff',
font: {
size: '20vp',
weight: FontWeight.Medium
}
} |
## PickerTextStyle10+
**Atomic service API**: This API can be used in atomic services since API version 11.
| Name | Type | Mandatory | Description |
| ----- | ---------------------------------------- | ---- | ------------------------- |
| color | [ResourceColor](ts-types.md#resourcecolor) | No | Font color. |
| font | [Font](ts-types.md#font) | No | Text style. Only the font size and font weight are supported. |
## Events
In addition to the [universal events](ts-universal-events-click.md), the following events are supported.
### onChange(deprecated)
onChange(callback: (value: DatePickerResult) => void)
Triggered when a date is selected.
This API is supported since API version 8 and deprecated since API version 10. You are advised to use [onDateChange](#ondatechange10) instead.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type | Mandatory| Description |
| ------ | --------------------------------------------- | ---- | ---------------- |
| value | [DatePickerResult](#datepickerresult) | Yes | Selected time.|
### onDateChange10+
onDateChange(callback: Callback\)
Triggered when a date is selected.
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
**Parameters**
| Name| Type| Mandatory| Description |
| ------ | ---- | ---- | ------------------------------------------------------------ |
| callback | [Callback](ts-types.md#callback12)\ | Yes | Selected time, where the year, month, and day portions are subject to the selection, the hour and minute portions are subject to the current system time, and the second portion is always **00**.|
## DatePickerResult
**Atomic service API**: This API can be used in atomic services since API version 11.
**System capability**: SystemCapability.ArkUI.ArkUI.Full
| Name | Type | Read Only| Optional| Description |
| ----- | ------ | ---- | ---- | ------------------------------------------ |
| year | number | No | No | Year of the selected date. |
| month | number | No | No | Month of the selected date. The value ranges from 0 to 11. The value **0** indicates January, and **11** indicates December.|
| day | number | No | No | Day of the selected date. |
## Example
This example implements a date picker that allows users to switch between the Gregorian (solar) calendar and the lunar calendar by clicking a button.
```ts
// xxx.ets
@Entry
@Component
struct DatePickerExample {
@State isLunar: boolean = false
private selectedDate: Date = new Date('2021-08-08')
build() {
Column() {
Button('Switch Calendar')
.margin({ top: 30, bottom: 30 })
.onClick(() => {
this.isLunar = !this.isLunar
})
DatePicker({
start: new Date('1970-1-1'),
end: new Date('2100-1-1'),
selected: this.selectedDate
})
.disappearTextStyle({color: Color.Gray, font: {size: '16fp', weight: FontWeight.Bold}})
.textStyle({color: '#ff182431', font: {size: '18fp', weight: FontWeight.Normal}})
.selectedTextStyle({color: '#ff0000FF', font: {size: '26fp', weight: FontWeight.Regular, family: "HarmonyOS Sans", style: FontStyle.Normal}})
.lunar(this.isLunar)
.onDateChange((value: Date) => {
this.selectedDate = value
console.info('select current date is: ' + value.toString())
})
}.width('100%')
}
}
```
