Non-standard
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.
Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work 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.
Properties
| Attribute | Type | Description |
wheelDelta Read only |
long |
The distance in pixels (defined as so by MSDN, but the actual usage is different, see mousewheel). |
wheelDeltaX Read only |
long? |
The value along horizontal axis of wheelDelta. |
wheelDeltaY Read only |
long? |
The value along vertical axis of wheelDelta. |
Browser compatibility
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | (Yes) | No support | 6.0 | (Yes) | (Yes) |
window.MouseWheelEvent |
No support | No support | 9.0 | No support | No support |
wheelDeltaX |
(Yes) | No support | No support | No support | (Yes) |
wheelDeltaY |
(Yes) | No support | No support | No support | (Yes) |
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | No support | ? | ? | ? |
window.MouseWheelEvent |
? | No support | ? | ? | ? |
wheelDeltaX |
? | No support | ? | ? | ? |
wheelDeltaY |
? | No support | ? | ? | ? |
See also
- An event type which is used by this event object:
mousewheel - A standardized mouse wheel event object:
WheelEvent - Gecko's legacy mouse wheel event object:
MouseScrollEvent - The document in MSDN: MouseWheelEvent object