Web/API/WheelEvent/WheelEvent

The WheelEvent() constructor returns a newly created WheelEvent object.

Syntax

var wheelEvent = new WheelEvent(typeArg, wheelEventInit);

typeArg

Is a DOMString representing the name of the event.

wheelEventInit Optional

Is a WheelEventInit dictionary, having the following fields:

"deltaX", optional and defaulting to 0.0, is a double representing the horizontal scroll amount in the deltaMode unit.
"deltaY", optional and defaulting to 0.0, is a double representing the vertical scroll amount in the deltaMode unit.
"deltaZ", optional and defaulting to 0.0, is a double representing the scroll amount for the z-axis in the deltaMode unit.

"deltaMode", optional and defaulting to 0, is a unsigned long representing the unit of the delta values scroll amount. 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.

The WheelEventInit dictionary also accepts fields from the MouseEventInit, UIEventInit and EventInit dictionaries.

Specification	Status	Comment
Document Object Model (DOM) Level 3 Events SpecificationThe definition of 'WheelEvent()' in that specification.	Obsolete	Initial definition

	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
`WheelEvent()` constructor	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support 17	IE No support No	Opera Full support Yes	Safari Full support 6.1	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 17	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support Yes