boolean?

functionsince v1.9.75 clojure.core/boolean?Edit
(boolean? x)

Source docstring:
Return true if x is a Boolean
Source code @ clojurescript:src/main/cljs/cljs/core.cljs
(defn ^boolean boolean?
  [x] (or (cljs.core/true? x) (cljs.core/false? x)))