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 | Status | Comment |
---|---|---|
Touch Events – Level 2 | Draft | Non-stable version. |
Touch Events | Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
length | Chrome Full support 18 | Edge Full support ≤18 | Firefox
Full support
52
| IE No support No | Opera Full support 15 | Safari No support No | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 6 | Opera Android Full support 14 | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support