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 is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. 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
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MouseWheelEvent | Chrome Full support Yes | Edge ? | Firefox No support No | IE Full support 6 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
wheelDelta | Chrome No support No | Edge ? | Firefox No support No | IE Full support 9 | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android No support No | Opera Android No support No | Safari iOS No support No | Samsung Internet Android ? |
wheelDeltaX | Chrome Full support Yes | Edge ? | Firefox No support No | IE No support No | Opera No support No | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android No support No | Opera Android No support No | Safari iOS ? | Samsung Internet Android ? |
wheelDeltaY | Chrome Full support Yes | Edge ? | Firefox No support No | IE No support No | Opera No support No | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android No support No | Opera Android No support No | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support Ā
- Full support
- No support Ā
- No support
- Compatibility unknown Ā
- Compatibility unknown
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.
- Deprecated. Not for use in new websites.
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