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    WheelEvent

    The WheelEvent interface represents events that occur due to the user moving a mouse wheel or similar input device.

    This is the standard wheel event interface to use.

    Old versions of browsers implemented the two non-standard and non-cross-browser-compatible MouseWheelEvent and MouseScrollEvent interfaces. Use this interface and avoid the latter two.

    Constructor

    WheelEvent()
    Creates a WheelEvent object.

    Properties

    This interface inherits properties from its parents, MouseEvent, UIEvent and Event.

    WheelEvent.deltaX Read only
    Returns a double representing the horizontal scroll amount.
    WheelEvent.deltaY Read only
    Returns a double representing the vertical scroll amount.
    WheelEvent.deltaZ Read only
    Returns a double representing the scroll amount for the z-axis.
    WheelEvent.deltaMode Read only
    Returns an 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.

    Methods

    This interface doesn't define any methods, but inherits methods from its parents, MouseEvent, UIEvent and Event.

    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 (WebKit)
    Basic support 31 17.0 (17.0) 9.0 18 Not supported
    window.WheelEvent (Yes) 17.0 (17.0) 9.0 (Yes) (Yes) [1]
    Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
    Basic support (Yes) 17.0 (17.0) ? (Yes) Not supported
    window.WheelEvent (Yes) 17.0 (17.0) ? (Yes) ?

    [1] Safari don't support WheelEvent actually; nevertheless they return object for window.WheelEvent.

    See also

    Document Tags and Contributors

    Last updated by: fscholz,