diff --git a/project.clj b/project.clj
index 9c76ed5..6c41151 100644
--- a/project.clj
+++ b/project.clj
@@ -1,5 +1,5 @@
 
-(defproject reagent "0.4.2"
+(defproject reagent "0.4.3-SNAPSHOT"
   :url "http://github.com/holmsand/reagent"
   :license {:name "MIT"}
   :description "A simple ClojureScript interface to React"
diff --git a/src/reagent/impl/batching.cljs b/src/reagent/impl/batching.cljs
index fd2d8ce..8ed3deb 100644
--- a/src/reagent/impl/batching.cljs
+++ b/src/reagent/impl/batching.cljs
@@ -3,7 +3,7 @@
   (:require [reagent.debug :refer-macros [dbg log]]
             [reagent.interop :refer-macros [get. set. call.]]
             [reagent.ratom :as ratom]
-            [reagent.impl.util :refer [cljs-level is-client]]
+            [reagent.impl.util :refer [is-client]]
             [clojure.string :as string]))
 
 ;;; Update batching
diff --git a/src/reagent/impl/component.cljs b/src/reagent/impl/component.cljs
index 9e871d2..9f9f197 100644
--- a/src/reagent/impl/component.cljs
+++ b/src/reagent/impl/component.cljs
@@ -1,22 +1,20 @@
 
 (ns reagent.impl.component
-  (:require [reagent.impl.util :as util :refer [cljs-level cljs-argv React]]
+  (:require [reagent.impl.util :as util :refer [React]]
             [reagent.impl.batching :as batch]
             [reagent.ratom :as ratom]
+            [reagent.interop :refer-macros [get. set. call.]]
             [reagent.debug :refer-macros [dbg prn]]))
 
 (declare ^:dynamic *current-component*)
 
-(def cljs-state "cljsState")
-(def cljs-render "cljsRender")
-
 ;;; State
 
 (defn state-atom [this]
-  (let [sa (aget this cljs-state)]
+  (let [sa (get. this :cljsState)]
     (if-not (nil? sa)
       sa
-      (aset this cljs-state (ratom/atom nil)))))
+      (set. this :cljsState (ratom/atom nil)))))
 
 (defn state [this]
   (deref (state-atom this)))
@@ -32,14 +30,14 @@
 
 ;;; Rendering
 
-(defn do-render [C]
-  (binding [*current-component* C]
-    (let [f (aget C cljs-render)
+(defn do-render [c]
+  (binding [*current-component* c]
+    (let [f (get. c :cljsRender)
           _ (assert (util/clj-ifn? f))
-          p (util/js-props C)
-          res (if (nil? (aget C "componentFunction"))
-                (f C)
-                (let [argv (aget p cljs-argv)
+          p (get. c :props)
+          res (if (nil? (get. c :componentFunction))
+                (f c)
+                (let [argv (get. p :argv)
                       n (count argv)]
                   (case n
                     1 (f)
@@ -49,11 +47,11 @@
                     5 (f (nth argv 1) (nth argv 2) (nth argv 3) (nth argv 4))
                     (apply f (subvec argv 1)))))]
       (if (vector? res)
-        (.asComponent C res (aget p cljs-level))
+        (call. c :asComponent res (get. p :level))
         (if (ifn? res)
           (do
-            (aset C cljs-render res)
-            (do-render C))
+            (set. c :cljsRender res)
+            (do-render c))
           res)))))
 
 
@@ -66,51 +64,48 @@
     
     :getInitialState
     (fn []
-      (this-as C
-               (set-state C (f C))))
+      (this-as c
+               (set-state c (f c))))
 
     :componentWillReceiveProps
     (fn [props]
-      (this-as C
-               (f C (aget props cljs-argv))))
+      (this-as c
+               (f c (get. props :argv))))
 
     :shouldComponentUpdate
     (fn [nextprops nextstate]
-      (this-as C
+      (this-as c
                ;; Don't care about nextstate here, we use forceUpdate
                ;; when only when state has changed anyway.
-               (let [inprops (util/js-props C)
-                     old-argv (aget inprops cljs-argv)
-                     new-argv (aget nextprops cljs-argv)]
+               (let [old-argv (get. c [:props :argv])
+                     new-argv (get. nextprops :argv)]
                  (if (nil? f)
                    (not (util/equal-args old-argv new-argv))
-                   (f C old-argv new-argv)))))
+                   (f c old-argv new-argv)))))
 
     :componentWillUpdate
     (fn [nextprops]
-      (this-as C
-               (let [next-argv (aget nextprops cljs-argv)]
-                 (f C next-argv))))
+      (this-as c
+               (f c (get. nextprops :argv))))
 
     :componentDidUpdate
     (fn [oldprops]
-      (this-as C
-               (let [old-argv (aget oldprops cljs-argv)]
-                 (f C old-argv))))
+      (this-as c
+               (f c (get. oldprops :argv))))
 
     :componentWillUnmount
     (fn []
-      (this-as C
-               (batch/dispose C)
+      (this-as c
+               (batch/dispose c)
                (when-not (nil? f)
-                 (f C))))
+                 (f c))))
 
     nil))
 
 (defn default-wrapper [f]
   (if (ifn? f)
     (fn [& args]
-      (this-as C (apply f C args)))
+      (this-as c (apply f c args)))
     f))
 
 (def dont-wrap #{:cljsRender :render :componentFunction})
@@ -148,9 +143,9 @@
     :cljsRender render-f
     :render (if util/is-client
               (fn []
-                (this-as C
-                         (batch/run-reactively C #(do-render C))))
-              (fn [] (this-as C (do-render C))))))
+                (this-as c
+                         (batch/run-reactively c #(do-render c))))
+              (fn [] (this-as c (do-render c))))))
 
 (defn wrap-funs [fun-map]
   (let [render-fun (or (:componentFunction fun-map)
@@ -159,8 +154,8 @@
                   (str "Render must be a function, not "
                        (pr-str render-fun)))
         name (or (:displayName fun-map)
-                 (.-displayName render-fun)
-                 (.-name render-fun))
+                 (get. render-fun :displayName)
+                 (get. render-fun :name))
         name' (if (empty? name) (str (gensym "reagent")) name)
         fmap (-> fun-map
                  (assoc :displayName name')
@@ -186,8 +181,8 @@
   [body as-component]
   (assert (map? body))
   (let [spec (cljsify body)
-        _ (set! (.-asComponent spec) (dont-bind as-component))
-        res (.createClass React spec)
+        _ (set. spec :asComponent (dont-bind as-component))
+        res (call. React :createClass spec)
         f (fn [& args]
             (as-component (apply vector res args)))]
     (set! (.-cljsReactClass f) res)
diff --git a/src/reagent/impl/template.cljs b/src/reagent/impl/template.cljs
index 78fce3a..81c5e11 100644
--- a/src/reagent/impl/template.cljs
+++ b/src/reagent/impl/template.cljs
@@ -1,8 +1,7 @@
 
 (ns reagent.impl.template
   (:require [clojure.string :as string]
-            [reagent.impl.util :as util
-             :refer [cljs-level cljs-argv is-client React]]
+            [reagent.impl.util :as util :refer [is-client React]]
             [reagent.impl.component :as comp]
             [reagent.impl.batching :as batch]
             [reagent.ratom :as ratom]
@@ -124,7 +123,7 @@
 (declare convert-args)
 
 (defn wrapped-render [this comp id-class input-setup]
-  (let [inprops (util/js-props this)
+  (let [inprops (get. this :props)
         argv (get. inprops :argv)
         props (nth argv 1 nil)
         hasprops (or (nil? props) (map? props))
@@ -137,16 +136,15 @@
     (aset jsargs 0 jsprops)
     (.apply comp nil jsargs)))
 
-(defn wrapped-should-update [C nextprops nextstate]
-  (let [inprops (util/js-props C)
-        a1 (get. inprops :argv)
+(defn wrapped-should-update [c nextprops nextstate]
+  (let [a1 (get. c [:props :argv])
         a2 (get. nextprops :argv)]
     (not (util/equal-args a1 a2))))
 
 (defn add-input-methods [spec]
   (doto spec
-    (set. :componentDidUpdate #(this-as C (input-did-update C)))
-    (set. :componentWillUnmount #(this-as C (batch/dispose C)))))
+    (set. :componentDidUpdate #(this-as c (input-did-update c)))
+    (set. :componentWillUnmount #(this-as c (batch/dispose c)))))
 
 (defn wrap-component [comp extras name]
   (let [input? (input-components comp)
@@ -207,14 +205,14 @@
   (assert (valid-tag? (nth v 0))
           (str "Invalid Hiccup form: " (pr-str v)))
   (let [c (as-class (nth v 0))
-        jsprops (js-obj cljs-argv v
-                        cljs-level level)]
+        jsprops #js {:argv v
+                     :level level}]
     (let [k (-> v meta get-key)
           k' (if (nil? k)
                (-> v (nth 1 nil) get-key)
                k)]
       (when-not (nil? k')
-        (aset jsprops "key" k')))
+        (set. jsprops :key k')))
     (c jsprops)))
 
 (def tmp #js {})
diff --git a/src/reagent/impl/util.cljs b/src/reagent/impl/util.cljs
index e38b480..c97301d 100644
--- a/src/reagent/impl/util.cljs
+++ b/src/reagent/impl/util.cljs
@@ -11,13 +11,6 @@
 
 ;;; Props accessors
 
-(def props "props")
-(def cljs-level "level")
-(def cljs-argv "argv")
-
-(defn js-props [C]
-  (get. C :props))
-
 (defn extract-props [v]
   (let [p (nth v 1 nil)]
     (if (map? p) p)))
@@ -28,17 +21,17 @@
     (if (> (count v) first-child)
       (subvec v first-child))))
 
-(defn get-argv [C]
-  (get. C [:props :argv]))
+(defn get-argv [c]
+  (get. c [:props :argv]))
 
-(defn get-props [C]
-  (-> (get. C [:props :argv]) extract-props))
+(defn get-props [c]
+  (-> (get. c [:props :argv]) extract-props))
 
-(defn get-children [C]
-  (-> (get. C [:props :argv]) extract-children))
+(defn get-children [c]
+  (-> (get. c [:props :argv]) extract-children))
 
-(defn reagent-component? [C]
-  (-> (get. C [:props :argv]) nil? not))
+(defn reagent-component? [c]
+  (-> (get. c [:props :argv]) nil? not))
 
 
 ;; Misc utilities