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.

This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. Pages or Web apps using it may break at any time.

The MouseWheelEvent interface represents events that occur due to the user turning a mouse wheel.

Do not use this interface for wheel events.

Like MouseScrollEvent, this interface is non-standard and deprecated. It was used in non-Gecko browsers only. Instead use the standard WheelEvent.


Attribute Type Description
wheelDelta long The distance in pixels (defined as so by MSDN, but the actual usage is different, see mousewheel). Read only.
wheelDeltaX long? The value along horizontal axis of wheelDelta. Read only.
wheelDeltaY long? The value along vertical axis of wheelDelta. Read only.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) Not supported 6.0 (Yes) (Yes)
window.MouseWheelEvent Not supported Not supported 9.0 Not supported Not supported
wheelDeltaX (Yes) Not supported Not supported Not supported (Yes)
wheelDeltaY (Yes) Not supported Not supported Not supported (Yes)
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? Not supported ? ? ?
window.MouseWheelEvent ? Not supported ? ? ?
wheelDeltaX ? Not supported ? ? ?
wheelDeltaY ? Not supported ? ? ?

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API Deprecated DOM Interface Reference Référence