WheelEvent()

The WheelEvent() constructor returns a newly created WheelEvent object.

typeArg

Is a DOMString representing the name of the event.

wheelEventInit Optional

Is a WheelEventInit dictionary, having the following fields:

• "deltaX", optional and defaulting to 0.0, is a double representing the horizontal scroll amount in the deltaMode unit.
• "deltaY", optional and defaulting to 0.0, is a double representing the vertical scroll amount in the deltaMode unit.
• "deltaZ", optional and defaulting to 0.0, is a double representing the scroll amount for the z-axis in the deltaMode unit.
• "deltaMode", optional and defaulting to 0, is a 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.

Note: The WheelEventInit dictionary also accepts fields from the MouseEventInit, UIEventInit and EventInit dictionaries.

• The WheelEvent interface it belongs to.