reader conditionals for javascript flavors

Question

Why doesn't clojure have reader conditional for nodejs and browser? They are very different environments with different utilities and libraries.

Currently I'm doing this

#?(:cljs (def is-browser
           (exists? js/window)))
#?(:cljs (if (not is-browser)
           (require 'http)))

Is there a better way?

Answer 1

It's a open problem in clojurescript (maybe in JS itself?)

shadow-cljs allow you to define custom conditionals

https://shadow-cljs.github.io/docs/UsersGuide.html#_conditional_reading

then you can do
(def browser? #?(:node false :cljs true))