Fires an event when the mouse is scrolled.
modifierKey — The keyboard button (if any) that must be held for the mouse action to be tracked.scrolled — When the mouse is scrolled, fires an event with the distance scrolled. This is the change in position since the previous scrolled event. The vertical distance (y-coordinate) respects the operating system’s “natural scrolling” setting.Keywords: bang, events, fire, touchpad, trackball, trackpad, trigger, wheel