- although figwheel is an awesome build tool, shadow-cljs with its near seamless npm integration is imo the most powerful Cljs build tool atm [1].
- cljs-bean[2], recently released by Mike Fikes is a really cool tool: it makes working with POJO really easy without too much performance penalty
- the new react hook API is imo a game changer for CLJS frontend frameworks: the decision to overload native function for componenents instead of using ES6 classes makes working with react componenent much more easier, imo this new API suits CLJS perfectly: hooks are just js functions that are called in the same order at each render pass.
- clojure.spec and clojure.spec.gen in a REPL are really powerful tools for frontend development that are unavailable in the wide JS world.
All in all I am actually much more optimist than a few months back about the future of CLJS frontend dev, those are still relatively new tools, clojure.spec is still a work in progress (although I would recommend to take a look at the metosin spec-tools which are really nice).
Edit: formatting
[1] https://code.thheller.com/blog/shadow-cljs/2018/06/15/why-no...