当触点与触控平面接触时触发touchstart 事件.
常规信息
- 规范
- Touch Events
- 接口
TouchEvent- 是否冒泡
- Yes
- 能否取消默认行为
- Yes
- 目标
- Document, Element
- 默认行为
- 无
属性
| Property | Type | Description |
|---|---|---|
target 只读 |
EventTarget |
The event target (the topmost target in the DOM tree). |
type 只读 |
DOMString |
The type of event. |
bubbles 只读 |
Boolean |
Whether the event normally bubbles or not |
cancelable 只读 |
Boolean |
Whether the event is cancellable or not? |
view 只读 |
WindowProxy |
document.defaultView (window of the document) |
detail 只读 |
long (float) |
0. |
touches 只读 |
TouchList | A list of Touches for every point of contact currently touching the surface. |
targetTouches 只读 |
TouchList | A list of Touches for every point of contact that is touching the surface and started on the element that is the target of the current event. |
changedTouches 只读 |
TouchList |
A list of Touches for every point of contact which contributed to the event.For the touchstart event this must be a list of the touch points that just became active with the current event. For the touchmove event this must be a list of the touch points that have moved since the last event. For the touchend and touchcancel events this must be a list of the touch points that have just been removed from the surface. |
ctrlKey 只读 |
boolean | true if the control key was down when the event was fired. false otherwise. |
shiftKey 只读 |
boolean | true if the shift key was down when the event was fired. false otherwise. |
altKey 只读 |
boolean | true if the alt key was down when the event was fired. false otherwise. |
metaKey 只读 |
boolean | true if the meta key was down when the event was fired. false otherwise. |
例子
这些事件的代码示例在这个页面 Touch events 中均有体现。
浏览器兼容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 22.0 | 18.0 (18.0) | 未实现 | 未实现 | 未实现 |
| Feature | Android | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | 6.0 (6.0) | (Yes) | 11 | (Yes) | (Yes) |