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);
  },
  false,
);

Specifications

Specification
Touch Events
# dom-touchlist-length

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
length

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
Partial support
Partial support
No support
No support
Has more compatibility info.