[ type ] MouseWheelEvent

Mouse wheel event received by the onMouseWheel() handler callback.

Type: Object

Name	Type	Description
`target`	object	The component that triggered the event.
`type`	string	Always `wheel`.
`[button]`	number	Button number. One of `MouseButton` enum values. Present when applicable.
`scrollAmount`	number	Number of units to scroll per wheel click.
`rotation`	number	Number of wheel "clicks" rotated. Can be zero until a full click is accumulated on high-resolution wheels.
`[modifiers]`	number	Keyboard modifiers (bitmask or flags).
`[alt]`	boolean	Indicates if ALT key was pressed.
`[shift]`	boolean	Indicates if SHIFT key was pressed.
`[ctrl]`	boolean	Indicates if CTRL key was pressed.
`x`	number	Mouse X position relative to the component.
`y`	number	Mouse Y position relative to the component.
`screenX`	number	Mouse X position relative to the screen.
`screenY`	number	Mouse Y position relative to the screen.