If I have postgres running on this server, is it possible, in a cljs program running on the same server to connect directly to that postgres db? I assumed it would be straightforward using some well established node library but I can't find any examples. I'm not familiar with the node ecosystem.

I am having problems with some require statements. I am using shadow-cljs and I am trying to use this package: https://www.npmjs.com/package/qrcode I have translated this code:

var QRCode = require('qrcode')
QRCode.toDataURL('I am a pony!', function (err, url) {
  console.log(url)
})

(:require ["qrcode" :as qrcode]
            [clojure.string :as str])

...
(qrcode/toDataUrl (str/join \newline epc) (fn [err url] (println url)))