For the touchstart event this must be a list of the touch points that just became active with the current event. For the touchmove event this must be a list of the touch points that have moved since the last event. For the touchend and touchcancel events this must be a list of the touch points that have just been removed from the surface, with the last known coordinates of the touch points before they were removed.
This example demonstrates the utility and relations between the touches and targetTouches members defined in the TouchEvent interface. The following code will generate different output based on the number of touch points on the touchable element and the document:
The user agent may dispatch both touch events and (for compatibility with web content not designed for touch) mouse events [[!DOM-LEVEL-2-EVENTS]] in response to the same user input. If the user agent dispatches both touch events and mouse events in response to a single user action, then the touchstart event type must be dispatched before any mouse event types for that action. If touchstart, touchmove, or touchend are canceled, the user agent should not dispatch any mouse event that would be a consequential result of the prevented touch event.
If, however, either the touchstart, touchmove or touchend event has been canceled during this interaction, no mouse or click events will be fired, and the resulting sequence of events would simply be:
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