WheelEvent: WheelEvent() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

See full compatibility

The WheelEvent() constructor returns a new WheelEvent object.

Note: If you construct a synthetic event using this constructor, that event will not be trusted, for security reasons. Only browser-generated WheelEvent objects are trusted and only trusted events trigger default actions.

Syntax

new WheelEvent(type)
new WheelEvent(type, options)

Parameters

type

A string with the name of the event. It is case-sensitive and browsers always set it to wheel.

options Optional

An object that, in addition of the properties defined in MouseEvent(), can have the following properties:

deltaX Optional

A floating number representing the horizontal scroll amount in the deltaMode unit. It defaults to 0.0.

deltaY Optional

A floating number representing the vertical scroll amount in the deltaMode unit. It defaults to 0.0.

deltaZ Optional

A floating number representing the scroll amount for the z-axis scroll amount in the deltaMode unit. It defaults to 0.0.

deltaMode Optional

An integer representing the unit of the delta values scroll amount. It defaults to 0x00. Permitted values are:

Constant	Value	Description
`DOM_DELTA_PIXEL`	`0x00`	The delta values are specified in pixels.
`DOM_DELTA_LINE`	`0x01`	The delta values are specified in lines.
`DOM_DELTA_PAGE`	`0x02`	The delta values are specified in pages.

Return value

A new WheelEvent object.

Specifications

Specification
Pointer Events # dom-wheelevent-constructor

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`WheelEvent()` constructor	Chrome – Full support Chrome 26 (Release date: 2013-03-26) footnote Full support	Edge – Full support Edge 12 (Release date: 2015-07-29) footnote Full support	Firefox – Full support Firefox 17 (Release date: 2012-11-20) footnote Full support	Opera – Full support Opera 15 (Release date: 2013-07-02) footnote Full support	Safari – Full support Safari 7 (Release date: 2013-10-22) footnote Full support	Chrome Android – Full support Chrome Android 26 (Release date: 2013-04-03) footnote Full support	Firefox for Android – Full support Firefox for Android 17 (Release date: 2012-11-20) footnote Full support	Opera Android – Full support Opera Android 14 (Release date: 2013-05-21) footnote Full support	Safari on iOS – Full support Safari on iOS 7 (Release date: 2013-09-18) footnote Full support	Samsung Internet – Full support Samsung Internet 1 (Release date: 2013-04-27) footnote Full support	WebView Android – Full support WebView Android 4.4 (Release date: 2013-12-09) footnote Full support	WebView on iOS – Full support WebView on iOS 7 (Release date: 2013-09-18) footnote Full support

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Full support: Full support