char?

functionsince v1.7.10 clojure.core/char?Edit
(char? x)

Source docstring:
Returns true if x is a JavaScript string of length one.
Source code @ clojurescript:src/main/cljs/cljs/core.cljs
(defn ^boolean char?
  [x]
  (and (string? x) (== 1 (.-length x))))