What do you mean how? Clojurescript compiler today has four different, well documented options related to source maps: https://github.com/clojure/clojurescrip

What do you mean how? Clojurescript compiler today has four different, well documented options related to source maps: https://github.com/clojure/clojurescript/wiki/Compiler-Options#source-map-timestamp https://github.com/clojure/clojurescript/wiki/Compiler-Optio... Just yesterday I placed `(js* "debugger;")` in my .cljs code and it stopped exactly where I wanted it. And showed exact piece of Clojurescript (not compiled JS)