WheelEvent deltaX Property

Return whether the user scrolls left or right:

function myFunction(event) {
var x = event.deltaX;
}

Description

The deltaX property returns a positive value when scrolling to the right, and a negative value when scrolling to the left, otherwise 0.

Note: Most mouse devices do not have the ability to scroll left and right, and will always return 0.

Note: This property is read-only.

event.deltaX

Return Value:	A Double, indicating the scrolling direction of the mouse wheel

event.deltaX is a DOM Level 4 (2015) feature.

It is supported in all modern browsers:


Chrome	Edge	Firefox	Safari	Opera
Yes	Yes	Yes	Yes	Yes

event.deltaX is not supported in Internet Explorer 11 (or earlier).