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元素
(
EventTarget
) on which the touch contact started when it was first placed on the surface, even if the touch point has since moved outside the interactive area of that element or even been removed from the document. Note that if the target element is removed from the document, events will still be targeted at it, and hence won't necessarily bubble up to the window or document anymore. If there is any risk of an element being removed while it is being touched, the best practice is to attach the touch listeners directly to the target.
var el = touchPoint.target;
el
触摸
对象。
This example illustrates how to access the
触摸
对象的
Touch.target
property. The
Touch.target
property is an
元素
(
EventTarget
) on which a touch point is started when contact is first placed on the surface.
In following simple code snippet, we assume the user initiates one or more touch contacts on the
source
element. When the
touchstart
event handler for this element is invoked, each touch point's
Touch.target
property is accessed via the event's
TouchEvent.targetTouches
列表。
// Register a touchmove listener for the 'source' element
var src = document.getElementById("source");
src.addEventListener('touchstart', function(e) {
// Iterate through the touch points that were activiated
// for this element.
for (var i=0; i < e.targetTouches.length; i++) {
console.log("touchpoint[" + i + "].target = " + e.targetTouches[i].target);
}
}, 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
target
|
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
见实现注意事项。