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.
Obsolete Initial definition.

Browser compatibility

BCD tables only load in the browser

See also