Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.
The 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).
The following values are possible.Constant name Value Description MOZ_SOURCE_UNKNOWN0 The input device is unknown. MOZ_SOURCE_MOUSE1 The event was generated by a mouse (or mouse-like device). MOZ_SOURCE_PEN2 The event was generated by a pen on a tablet. MOZ_SOURCE_ERASER3 The event was generated by an eraser on a tablet. MOZ_SOURCE_CURSOR4 The event was generated by a cursor. MOZ_SOURCE_TOUCH5 The event was generated on a touch interface. MOZ_SOURCE_KEYBOARD6 The event was generated by a keyboard.
Not part of any specification.