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.

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).


var source = event.mozInputSource;


The following values are possible.

Constant name Value Desription
MOZ_SOURCE_UNKNOWN 0 The input device is unknown.
MOZ_SOURCE_MOUSE 1 The event was generated by a mouse (or mouse-like device).
MOZ_SOURCE_PEN 2 The event was generated by a pen on a tablet.
MOZ_SOURCE_ERASER 3 The event was generated by an eraser on a tablet.
MOZ_SOURCE_CURSOR 4 The event was generated by a cursor.
MOZ_SOURCE_TOUCH 5 The event was generated on a touch interface.
MOZ_SOURCE_KEYBOARD 6 The event was generated by a keyboard.


Not part of any specification.

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 Contributors to this page: teoli, Nickolay, Sheppy, trevorh
 Last updated by: teoli,