TouchEvent.shiftKey

The read-only shiftKey property of the TouchEvent interface returns a boolean value indicating whether or not the shift key is enabled when the touch event is created. If this key is enabled, the attribute's value is true. Otherwise, it is false.

var shiftEnabled = touchEvent.shiftKey;

The boolean value true if the shift key is enabled for this event; and false if the shift key is not enabled.

The TouchEvent.altKey example includes an example of this property's usage.