Touch: target property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The read-only target
property of the Touch
interface returns the (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.
Value
The EventTarget
the Touch
object applies to.
Examples
This example illustrates how to access the Touch
object's Touch.target
property. The Touch.target
property is an Element
(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
list.
// Register a touchmove listener for the 'source' element
const src = document.getElementById("source");
src.addEventListener(
"touchstart",
(e) => {
// Iterate through the touch points that were activated
// for this element.
for (let i = 0; i < e.targetTouches.length; i++) {
console.log(`touchpoint[${i}].target = ${e.targetTouches[i].target}`);
}
},
false,
);
Specifications
Specification |
---|
Touch Events # dom-touch-target |
Browser compatibility
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