# Touch Event
A touch event is triggered when a finger is pressed, slides, or is lifted from a component.
> **NOTE**
>
> This event is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.
## Events
| Name | Bubbling Supported| Description |
| ------------------------------------------------------------ | -------- | ------------------------------------------------------------ |
| onTouch(event: (event?: TouchEvent) => void) | Yes | Invoked when a touch action is triggered. For details about **event**, see [TouchEvent](#touchevent).|
## TouchEvent
| Name | Type | Description |
| ------------------- | ---------------------------------------- | ------------ |
| type | [TouchType](ts-appendix-enums.md#touchtype) | Type of the touch event. |
| touches | Array<[TouchObject](#touchobject)> | All finger information. |
| changedTouches | Array<[TouchObject](#touchobject)> | Finger information changed.|
| stopPropagation | () => void | Stops the event from bubbling upwards or downwards.|
| timestamp8+ | number | Timestamp of the event. It is interval between the time when the event is triggered and the time when the system starts, in nanoseconds.|
| target8+ | [EventTarget](ts-universal-events-click.md) | Display area of the element that triggers the gesture event.|
| source8+ | [SourceType](ts-gesture-settings.md) | Event input device.|
## TouchObject
| Name | Type | Description |
| ------- | ------------------------------------------- | ------------------------------------- |
| type | [TouchType](ts-appendix-enums.md#touchtype) | Type of the touch event. |
| id | number | Unique identifier of a finger. |
| screenX | number | X coordinate of the touch point relative to the upper left corner of the application window. |
| screenY | number | Y coordinate of the touch point relative to the upper left corner of the application window. |
| x | number | X coordinate of the touch point relative to the upper left corner of the component being touched.|
| y | number | Y coordinate of the touch point relative to the upper left corner of the component being touched.|
## Example
```ts
// xxx.ets
@Entry
@Component
struct TouchExample {
@State text: string = ''
@State eventType: string = ''
build() {
Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
Button('Touch').backgroundColor(0x2788D9).height(40).width(80)
.onTouch((event: TouchEvent) => {
if (event.type === TouchType.Down) {
this.eventType = 'Down'
}
if (event.type === TouchType.Up) {
this.eventType = 'Up'
}
if (event.type === TouchType.Move) {
this.eventType = 'Move'
}
console.info(this.text = 'TouchType:' + this.eventType + '\nDistance between touch point and touch element:\nx: '
+ event.touches[0].x + '\n' + 'y: ' + event.touches[0].y + '\ncomponent globalPos:('
+ event.target.area.globalPosition.x + ',' + event.target.area.globalPosition.y + ')\nwidth:'
+ event.target.area.width + '\nheight:' + event.target.area.height)
})
Text(this.text)
}.height(200).width(350).padding({ left: 35, right: 35, top: 35 })
}
}
```
