WheelEvent deltaMode Property

Return the length unit of the delta values:

function myFunction(event) {
var x = event.deltaMode;
// 0 = pixels
// 1 = lines
// 2 = pages
}

Description

The deltaMode property returns a number representing the length unit of the scrolling values (deltaX, deltaY, and deltaZ).

0 = pixels
1 = lines
2 = pages

Note: This property is read-only.

event.deltaMode

Return Value:	A Number, indicating the length unit of the delta values Possible values: 0 = pixels 1 = lines 2 = pages

event.deltaMode is a DOM Level 3 (2004) feature.

It is fully supported in all modern browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	11