> Is it possible to setup ol.snap.interaction to Snaps objects on multiple
> layers while drawing,
> as is in Openlayers version 2.
> If anyone has an idea, and perhaps examples of how to accomplish this?
I haven't used this yet but according to the api docs you can provide
either "features" or "source". My idea is to create a feature collection
of the features of all layer sources you want to use for snapping. This
collection can be passed directly via the "features" property. Or you
can create a new source with the collection and pass it via the "source"