WheelEvent deltaZ Property

DOM Events WheelEvent

Definition and Usage

The deltaZ property returns a positive value when scrolling, a negative value when scrolling, and 0 otherwise.

Note:Most mouse devices do not have the ability to scroll along the z-axis and always return 0.

Note:This property is read-only.

Example

Return whether the user is scrolling inward or outward (along the z-axis):

function myFunction(event) {
  var z = event.deltaZ;
}

Try it yourself

Syntax

event.deltaZ

Technical Details

Return Value: Double type value indicating the scrolling direction of the mouse wheel.

Browser Support

Property Chrome IE Firefox Safari Opera
deltaZ 31 Supported 17 Not Supported 18

Related Pages

HTML DOM Reference Manual:WheelEvent deltaY Property

HTML DOM Reference Manual:WheelEvent deltaX Property

DOM Events WheelEvent