deltaY

deltaY : Number

The amount of change (in pixels) vertically since the last time a callback was fired on that axis. For example, onChangeY or onDown

Details

The amount of change (in pixels) vertically since the last time a callback was fired on that axis. For example, onChangeY or onDown

This is only affected by the event types that the Observer is watching. So, for example, type: "wheel,touch" would track the delta based on wheel and touch events (not pointer or scroll). By default, touch and pointer events are only tracked while pressing/dragging but if you define an onMove (which is mapped to "pointermove"/"mousemove" events), it'll be tracked during any movement while hovering over the target.