touchstart

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

• Desktop
• Mobile

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)

相关事件

• ontouchstart