ts-basic-components-datepicker.md

# 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?: {start?: Date, end?: Date, selected?: Date})

Creates a date picker in the given date range.

**Parameters**
| Name| Type| Mandatory | Description|
| -------- | -------- | ------------- | -------- |
| start    | Date | No | Start date of the picker.<br>Default value: **Date('1970-1-1')**|
| end      | Date | No |   End date of the picker.<br>Default value: **Date('2100-12-31')**|
| selected | Date | No | Date of the selected item.<br>Default value: current system date |


## Attributes

| Name   | Type       | Description           |
| ------| -------------- | -------- |
| lunar | boolean  | Whether to display the lunar calendar.<br>- **true**: Display the lunar calendar.<br>- **false**: Do not display the lunar calendar.<br>Default value: **false**|


## Events

| Name| Description|
| -------- | -------- |
| onChange(callback: (value: DatePickerResult) =&gt; void) | Triggered when a date is selected.|

## DatePickerResult

| Name| Type| Description|
| -------- | -------- | -------- |
| year | number | Year of the selected date.|
| month | number | Month of the selected date. The value ranges from 0 to 11. The value **0** indicates January, and **11** indicates December.|
| day | number | Day of the selected date.|


## Example


```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 })
        .onClick(() => {
          this.isLunar = !this.isLunar
        })
      DatePicker({
        start: new Date('1970-1-1'),
        end: new Date('2100-1-1'),
        selected: this.selectedDate
      })
        .lunar(this.isLunar)
        .onChange((value: DatePickerResult) => {
          this.selectedDate.setFullYear(value.year, value.month, value.day)
          console.info('select current date is: ' + JSON.stringify(value))
        })

    }.width('100%')
  }
}
```

![datePicker](figures/datePicker.gif)