targetTouches
read-only property is a
TouchList
listing all the
触摸
objects for touch points that are still in contact with the touch surface
and
whose
touchstart
event occurred inside the same target
element
as the current target element.
var touches = touchEvent.targetTouches;
touches
TouchList
listing all the
触摸
objects for touch points that are still in contact with the touch surface
and
whose
touchstart
event occurred inside the same target
element
as the current target element.
This example illustrates the
TouchEvent
对象的
TouchEvent.targetTouches
property. The
TouchEvent.targetTouches
特性为
TouchList
object that includes those TPs that are currently touching the surface
and
started on the element that is the target of the current event. As such, the
targetTouches
list is a strict subset of the
touches
列表。
In following code snippet, the function compares the length of the
touches
list to the the length of the
targetTouches
list and returns
true
if the lengths are the same and returns
false
否则。
function touches_in_target(ev) {
// Return true if all of the touches are within the target element;
// otherwise return false.
return (ev.touches.length == ev.targetTouches.length ? true : false);
}
| 规范 | 状态 | 注释 |
|---|---|---|
| Touch Events – Level 2 | 草案 | 非稳定版本。 |
| 触摸事件 | 推荐 | 初始定义。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
targetTouches
|
Chrome 22 | Edge ≤18 |
Firefox
52
|
IE No | Opera Yes | Safari No | WebView Android Yes | Chrome Android Yes | Firefox Android 6 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes |
完整支持
不支持
TouchEvent