I saw that documentation, and it said to run (figwheel.main.api/start "dev"), but this gives me the error:

ExceptionInfo Failed to launch Figwheel CLJS REPL: nREPL connection found but unable to load piggieback.

This happens if I start with {:mode :serve} and then use cljs-repl after too...

Hmm, maybe piggieback is necessary after all, I'm not sure, sorry.