These docs are for an old release. Info on upgrading to v5
edit doc

eventMouseLeave

Triggered when the user mouses out of an event. Similar to the native mouseleave.

function( mouseLeaveInfo ) { }

mouseLeaveInfo is a plain object with the following properties:

event

The associated Event Object.

el

The HTML element for this event.

jsEvent

The native JavaScript event with low-level information such as click coordinates.

view

The current View Object.

Unlike some other event-related interactions, eventMouseLeave does not require the interaction plugin.