Web/API/MouseScrollEvent

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.

DeprecatedThis 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 MouseScrollEvent interface represents events that occur due to the user moving a mouse wheel or similar input device.

Do not use this interface for wheel events.

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

Method overview

void initMouseScrollEvent(in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in nsIDOMAbstractView viewArg, in long detailArg, in long screenXArg, in long screenYArg, in long clientXArg, in long clientYArg, in boolean ctrlKeyArg, in boolean altKeyArg, in boolean shiftKeyArg, in boolean metaKeyArg, in unsigned short buttonArg, in nsIDOMEventTarget relatedTargetArg, in long axis);

Attributes

Attribute	Type	Description
`axis` Read only	`long`	Indicates scroll direction.

Constants

Delta modes

Constant	Value	Description
`HORIZONTAL_AXIS`	`0x01`	The event is caused by horizontal wheel operation.
`VERTICAL_AXIS`	`0x02`	The event is caused by vertical wheel operation.

Methods

initMouseScrollEvent(): See nsIDOMMouseScrollEvent::initMouseScrollEvent().

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`MouseScrollEvent` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 3.5	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
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.