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

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