TouchList

The TouchList interface represents a list of contact points on a touch surface. For example, if the user has three fingers on the touch surface (such as a screen or trackpad), the corresponding TouchList object would have one Touch object for each finger, for a total of three entries.

This interface was an attempt to create an unmodifiable list and only continues to be supported to not break code that's already using it. Modern APIs represent list structures using types based on JavaScript arrays, thus making many array methods available, and at the same time imposing additional semantics on their usage (such as making their items read-only).

These historical reasons do not mean that you as a developer should avoid TouchList. You don't create TouchList objects yourself, but you get them from APIs such as TouchEvent.targetTouches, and these APIs are not deprecated. However, be careful of the semantic differences from a real array.

Instance properties

TouchList.length Read only

The number of Touch objects in the TouchList.

Instance methods

TouchList.item()

Returns the Touch object at the specified index in the list.

Example

See the example on the main Touch events article.

Specifications

Browser compatibility

See also

• Touch events
• Document.createTouchList()