This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
MouseEvent.mozInputSource read-only property on
MouseEvent provides information indicating the type of device that generated the event. This lets you, for example, determine whether a mouse event was generated by an actual mouse or by a touch event (which might affect the degree of accuracy with which you interpret the coordinates associated with the event).
var source = instanceOfMouseEvent.mozInputSource;
The following values are possible.
||0||The input device is unknown.|
||1||The event was generated by a mouse (or mouse-like device).|
||2||The event was generated by a pen on a tablet.|
||3||The event was generated by an eraser on a tablet.|
||4||The event was generated by a cursor.|
||5||The event was generated on a touch interface.|
||6||The event was generated by a keyboard.|
Not part of any specification.