app.js

function createIdent(identName){
    db = ds.db_with(db, vector(vector(DB_ADD, -1, "DB_IDENT", identName)))
}


const createHistory = require('history').createBrowserHistory

const history = createHistory()
createIdent("history")
//db = ds.db_with(db, vector(vector(DB_ADD, -1, "DB_IDENT", action)))
db = ds.db_with(db, vector( hashMap(DB_ID, vector("DB_IDENT", "history") , "current", toClj(removeNull(history.location)))))
const unlisten = history.listen((location, action) => { // eslint-disable-line no-unused-vars
    db = ds.db_with(db, vector( hashMap(DB_ID, vector("DB_IDENT", "history") , "current", toClj(removeNull(location)))))
    State.update(db)
})

schema.json

{
  "DB_IDENT": {
    ":db/unique": ":db.unique/identity"
  },
  "current": {
    ":db/valueType": ":db.type/ref",
    ":db/cardinality": ":db.cardinality/one"
  },
  "value": {
    ":db/unique": ":db.unique/identity"
  },
  "isset": {
    ":db/cardinality": ":db.cardinality/one"
  },
  "pathname": {
    ":db/unique": ":db.unique/identity"
  },
  "search": {
    ":db/unique": ":db.unique/identity"
  },
  "hash": {
    ":db/unique": ":db.unique/identity"
  },
  "messages/general": {
    ":db/cardinality": ":db.cardinality/many",
    ":db/valueType": ":db.type/ref",
    ":db/isComponent": true
  },
  "messages/errors": {
    ":db/cardinality": ":db.cardinality/many",
    ":db/valueType": ":db.type/ref",
    ":db/isComponent": true
  }
}