TouchList.length
The length
read-only property indicates the number of
items (touch points) in a given TouchList
.
Syntax
var numTouches = touchList.length;
Return value
numTouches
-
The number of touch points in
touchList
.
Example
This code example illustrates the use of the TouchList
interface's
item
method and the
length
property.
target = document.getElementById("target");
target.addEventListener('touchstart', function(ev) {
// If this touchstart event started on element target,
// set touch to the first item in the targetTouches list;
// otherwise set touch to the first item in the touches list
var touch;
if (ev.targetTouches.length >= 1)
touch = ev.targetTouches.item(0);
else
touch = ev.touches.item(0);
}, false);
Specifications
Specification |
---|
Touch Events # dom-touchlist-length |
Browser compatibility
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