WheelEvent.deltaMode

The WheelEvent.deltaMode read-only property returns an 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.

Syntax

var unit = event.deltaMode;

Example

var syntheticEvent = new WheelEvent("syntheticWheel", {"deltaX": 4, "deltaMode": 0});

console.log(syntheticEvent.deltaMode);

Specifications

Specification	Status	Comment
Document Object Model (DOM) Level 3 Events Specification The definition of 'WheelEvent.deltaMode' in that specification.	Working Draft	Initial definition.

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	31	(Yes)	17.0 (17.0)	9.0	18	7.0

Feature	Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	(Yes)	17.0 (17.0)	?	(Yes)	Not supported

WheelEvent.deltaMode

Syntax

Example

Specifications

Browser compatibility

See also

Document Tags and Contributors