WheelEvent: deltaZ property

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The WheelEvent.deltaZ read-only property is a double representing the scroll amount along the z-axis, in the WheelEvent.deltaMode unit.

You must check the deltaMode property to determine the unit of the deltaZ value. Do not assume that the deltaZ value is specified in pixels. Some browsers, for compatibility reasons, may return different units for the deltaZ value depending on whether deltaMode has been accessed, to accommodate for websites not explicitly checking the deltaMode property.

Value

A number.

Examples

js
const syntheticEvent = new WheelEvent("syntheticWheel", {
  deltaZ: 4,
  deltaMode: 0,
});

console.log(syntheticEvent.deltaZ);

Specifications

Specification
UI Events
# dom-wheelevent-deltaz

Browser compatibility

Report problems with this compatibility data on GitHub
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
deltaZ

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Full support

See also