What does this "#" mean in this Clojure context?

Question

I stumbled upon the official Om example under "examples/mixins", there's a definition as this:

(def MyComponent (let [obj (om/specify-state-methods! (clj->js om/pure-methods))]
    (aset obj "mixins" #js [TestMixin])
    (js/React.createClass obj)))

What does "#js" mean? I couldn't find any Clojure documentation on symbol "#" when it's used in this way.

Answer 1

From the Om tutorial:

#js {...} and #js [...] is what is referred to as a reader literal. ClojureScript supports data literals for JavaScript via #js. #js {...} is for JavaScript objects:

#js {:foo "bar"}  ;; is equivalent to
#js {"foo" "bar"}