Hi there - yes, Timbre supports compile-time elision for both Clojure and ClojureScript, see the https://github.com/taoensso/timbre/wiki/1-Getting-started#compile-time-elision for details 👍

ah, I missed the lein cljsbuild once line. The env var workflow feels a bit strange to me, I'm used to configuring this kind of stuff in shadow-cljs.edn . I guess the shadow-cljs server could be launched with jvm properties, would have to think about how to set that