TouchList.length
Summary
This read-only property indicates the number of items (touch points) in a TouchList
.
Syntax
JavaScript
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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.
JavaScript
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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 | Editor's Draft | Non-stable version. |
Touch Events | Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 22.0 | 18.0 (18.0) | Not supported | Not supported | Not supported |
Feature | Android | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | 6.0 (6.0) | (Yes) | 11 | (Yes) | (Yes) |
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/touchlist/length