Why even limit it to Clojure and ClojureScript? I could use this from JavaScript or PureScript as an immutable local store to replicate/merge with the backend asynchronously.

The query language is embedded in legal Clojure data structures, so it would be tricky to port to JS. That's a drawback of embedded DSL's I suppose.

Contingent on the design but not necessary. I could make something similar in PureScript.

I wouldn't use Datalog though, I got turned off on it after using Datomic at work.

Similar to Datomic, which has Java bindings and allows for query DSL be specified just as a regular String, we can do this for JS interop

From what I can see, DataScript is in-memory only. Wouldn't that be the same as downloading Datomic-free and creating an in-memory db?

he actually has a clj version in the src. https://github.com/tonsky/datomicscript/blob/master/src/dato...

It was commited accidentally. Yes, it may be translated to clojure. However, I still don’t know if I should do it, given we have in-memory db bundled with Datomic free client jar.

Isn't your work released under a less restrictive license than main Datomic?