ClojureScript is awesome. There are several tools available for live-coding (REPL-driven development) such as more recent shadowcljs or the older Figwheel. Ru

ClojureScript is awesome. There are several tools available for live-coding (REPL-driven development) such as more recent shadowcljs or the older Figwheel. Rum is a powerful wrapper over React.js and you can live code and see instantaneous results in the browser (using shadowcljs or figwheel). ClojureScript's strengths largely stem from Clojure -- collections as fundamental types, REPL, macros, immutable datastructures* and lovely syntax. As far as cons go, it takes some time to start up a REPL and making release builds is an extra step, but should work just fine unless you're a newbie like me and you leave strange unnecessary lines in your code. Javascript and js/CSS interop is there, but it's not super obvious and takes some getting used to what it looks like -- luckily there are enough online writeups to make that process easier. The addage "why clojurescript? Because clojure rocks and javascript reaches" sums up nicely the motivation. You can have largely isomorphic code on the front-end and back-end, which lends nicely to creating server-side rendered versions of SPAs for search engine indexing and fast load times. However, the server-side copy and the client rendered copy must match exactly for this to work, which can be a bit of a "thread the needle" kind of problem. * immutable datastructures are awesome, contrast with mutable datastructures and "location oriented programming" -- any time you "edit" a value you're actually creating a new datum. This is done with atoms (immutable data stores that need to be dereferenced to retrieve their value) and operations such as swap! and reset! that either apply a function to the current value of an atom, resulting in a fresh new atom with the new value, or overwrite the atom completely with some value, respectively. So yeah, if you like live-coding and appreciate the power of lisp, it's a really nice fit. Yes, the way to do stuff is "opinionated" but it's opinionated in what many years of trudging through the tar pit* would suggest is the right (only?) way to do things. * Out of the Tar Pit [http://curtclifton.net/papers/MoseleyMarks06a.pdf http://curtclifton.net/papers/MoseleyMarks06a.pdf] I highly recommend Rich Hickey's talk "Are we there yet?" to give you an overview of the motivations behind Clojure and subsequently ClojureScript. [https://www.infoq.com/presentations/Are-We-There-Yet-Rich-Hickey/ https://www.infoq.com/presentations/Are-We-There-Yet-Rich-Hi...]