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WheelEvent()

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

Syntax

var wheelEvent = new WheelEvent(typeArg, wheelEventInit); 

Properties

typeArg
Is a DOMString representing the name of the event.
wheelEventInitOptional
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.

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

Specifications

Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'WheelEvent()' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 17.0 (17.0) Not supported (Yes) (Yes)
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 17.0 (17.0) Not supported (Yes) (Yes)

See also

 

Document Tags and Contributors

 Contributors to this page: jwhitlock, teoli
 Last updated by: jwhitlock,