Checking for inactivity in ClojureScript

inactivity.cljs

(defn inactive[]
  (js/console.log "You have been inactive!!!"))

(def timer (atom nil))

(defn reset-timer []
  (js/clearTimeout @timer)
  (swap! timer #(js/setTimeout inactive 3000)))

(defn inactivity-time []
  (set! (.-onload js/window) reset-timer)
  (set! (.-onmousemove js/document) reset-timer)
  (set! (.-onkeypress js/document) reset-timer))