This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The MouseEvent.offsetX read-only property provides the offset in the X coordinate of the mouse pointer between that event and the padding edge of the target node.


var xOffset = instanceOfMouseEvent.offsetX;

Return value

An integer.


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'MouseEvent' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support 39.0 (39.0) (Yes) 6 (Yes) (Yes)
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support 43.0 (43.0) ? ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: teoli, cvrebert
 Last updated by: teoli,