ClojureScript 1.10.520
cljs.user=> (require '["clojure.set" :as set])
nil
cljs.user=> (dir set)
Unexpected error (AssertionError) macroexpanding cljs.repl/dir at (<cljs repl>:1:1).
Assert failed: (symbol? ns)
Instead, expect that {{dir}} would show the vars in the {{clojure.set}} namespace.