functionsince v0.0-927 clojure.core/keywordEdit
(keyword name)
(keyword ns name)

Source docstring:
Returns a Keyword with the given namespace and name.  Do not use :
in the keyword strings, it will be added automatically.
Source code @ clojurescript:src/main/cljs/cljs/core.cljs
(defn keyword
  ([name] (cond
            (keyword? name) name
            (symbol? name) (Keyword.
                             (cljs.core/namespace name)
                             (cljs.core/name name) (.-str name) nil)
            (= "/" name) (Keyword. nil name name nil)
            (string? name) (let [parts (.split name "/")]
                             (if (== (alength parts) 2)
                               (Keyword. (aget parts 0) (aget parts 1) name nil)
                               (Keyword. nil (aget parts 0) name nil)))))
  ([ns name]
   (let [ns   (cond
                (keyword? ns) (cljs.core/name ns)
                (symbol? ns)  (cljs.core/name ns)
                :else ns)
         name (cond
                (keyword? name) (cljs.core/name name)
                (symbol? name) (cljs.core/name name)
                :else name)]
     (Keyword. ns name (str (when ns (str ns "/")) name) nil))))