Web/API/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	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.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
length	Chrome Full support 18	Edge Full support ≤18	Firefox Full support 52 Full support 52 No support 18 — 24	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

TouchList.length by Mozilla Contributors is licensed under CC-BY-SA 2.5.