The width (magnitude on the X axis), in CSS pixels, of the contact geometry of the pointer.
This property is read-only.
ptr = object.width
For touch hardware that doesn't support width or height, a CSS document pixel equivalent of 7 millimeters is returned. For mouse or pen input, a value off 1 pixel is returned.
In Internet Explorer 10, the returned value is in screen pixels. In Internet Explorer 11, the returned value is in CSS document pixels, where for example, a div sized to the values of PointerEvent.width and PointerEvent.height would have the same size as the finger contact.