This property is the angle (in degrees) between the X-Z plane of the pointer and the screen. This property is typically only useful for a pen/stylus pointer type. The range of values is -90 to 90 degrees and a positive value is a tilt toward the user. For devices that do not support this property, the value is 0.
The width of the pointer's contact geometry along the x-axis, measured in CSS pixels. Depending on the source of the pointer device (such as a finger), for a given pointer, each event may produce a different value.