The MouseEvent.movementX read-only property provides the shift in the X coordinate of the mouse pointer between that event and the previous mousemove event. In other words, the value of that property is computed that way : currentEvent.movementX = currentEvent.screenX - previousEvent.screenX.


var xShift = instanceOfMouseEvent.movementX

Return value

A number


Specification Status Comment
Pointer Lock
The definition of 'MouseEvent.movementX' in that specification.
Candidate Recommendation Initial definition

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support

1.0 (1.7 or earlier) moz
41 (41)

(Yes) ? ? ?
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support 1.0 (1.0) moz
41.0 (41)
? ? ? ?

See also

Document Tags and Contributors

Contributors to this page: teoli, nicofrand, kscarfone, Jeremie
Last updated by: teoli,