I wouldn't use Emacs for that, and I use Emacs since more than 25 years. Emacs shines when using Coq (with Proof General) or Common Lisp or Clojurescript (I gu

I wouldn't use Emacs for that, and I use Emacs since more than 25 years. Emacs shines when using Coq (with Proof General) or Common Lisp or Clojurescript (I guess Clojure too). But for mainstream languages like JS, Go or Python you're better off with something like Code.