If you wan't a cljs that acts like clj, but for ClojureScript, there are a few minor changes you can make:
First, add the following entry to ~/.clojure/deps.edn under the :deps key:
org.clojure/clojurescript {:mvn/version "1.10.439"}
Then make copies of clj and clojure named cljs and clojurescript, and put those copies on your path.
