TouchList: length property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The length read-only property indicates the number of
items (touch points) in a given TouchList.
Value
The number of touch points in touchList.
Examples
This code example illustrates the use of the TouchList interface's
item method and the
length property.
js
const target = document.getElementById("target");
target.addEventListener("touchstart", (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
const touch =
ev.targetTouches.length >= 1
? ev.targetTouches.item(0)
: ev.touches.item(0);
});
Specifications
| Specification |
|---|
| Touch Events # dom-touchlist-length |
Browser compatibility
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