Events

There are few events that you can listen for:

Prop	When fired?
onOpen	Every time instance is opened (both show and initialize).
onClose	Every time instance is closed.
onInit	When instance is opened for the first time.
onShow	When opening instance after initial open.
onSlideChange Pro	Called on slide change.

Set up callback function at specific property on props object, e.g.

        fsLightboxInstances['lightbox'].props.onSlideChange = (fsLightbox) => console.log(fsLightbox);
    