diff --git a/ignite-html.js b/ignite-html.js
index d1de50b..fd7b027 100644
--- a/ignite-html.js
+++ b/ignite-html.js
@@ -356,7 +356,11 @@ class IgniteProperty {
  * the property to a string.
  */
 IgniteProperty.prototype.toString = function () {
-    return this.value.toString();
+    if (this.value) {
+        return this.value.toString();
+    }
+
+    return null;
 }
 
 /**
@@ -485,12 +489,19 @@ class IgniteCallback {
         this.detach = detach;
     }
 
+    /**
+     * Invokes this callback.
+     * @param  {...any} params Any params to pass to the target function.
+     */
     async invoke(...params) {
         if (this.callback) {
             await this.callback(...params);
         }
     }
 
+    /**
+     * Invokes the detach callback for this callback if there is one.
+     */
     disconnect() {
         this.callback = null;
 
@@ -508,6 +519,9 @@ class IgniteCallback {
  * @ignore
  */
 class IgniteRendering {
+    /**
+     * Increments the rendering counter. Must call leave() for each enter().
+     */
     static enter() {
         if (!IgniteRendering.RenderCount) {
             IgniteRendering.RenderCount = 0;
@@ -516,12 +530,18 @@ class IgniteRendering {
         IgniteRendering.RenderCount++;
     }
 
+    /**
+     * Decrements the rendering counter, if 0, rendering() will return false.
+     */
     static leave() {
         if (IgniteRendering.RenderCount) {
             IgniteRendering.RenderCount--;
         }
     }
 
+    /**
+     * Saves the current rendering state.
+     */
     static push() {
         if (IgniteRendering.Stack == null) {
             IgniteRendering.Stack = [];
@@ -531,12 +551,19 @@ class IgniteRendering {
         IgniteRendering.RenderCount = 0;
     }
 
+    /**
+     * Restores the last rendering state.
+     */
     static pop() {
         if (IgniteRendering.Stack && IgniteRendering.Stack.length > 0) {
             IgniteRendering.RenderCount = IgniteRendering.Stack.pop();
         }
     }
 
+    /**
+     * Registers a callback function that will be invoked once rendering is complete.
+     * @param {IgniteCallback|Function} callback The callback function to invoke once rendering is complete.
+     */
     static ready(callback) {
         //Setup the callbacks if it's not init'd.
         if (!IgniteRendering.ReadyCallbacks) {
@@ -557,7 +584,13 @@ class IgniteRendering {
             IgniteRendering.ReadyTimer = setTimeout(async () => {
                 IgniteRendering.ReadyTimerRunning = true;
                 while (IgniteRendering.ReadyCallbacks.length > 0) {
-                    IgniteRendering.ReadyCallbacks.shift().invoke();
+                    var callback = IgniteRendering.ReadyCallbacks.shift();
+
+                    if (callback instanceof IgniteCallback) {
+                        callback.invoke();
+                    } else if (callback instanceof Function) {
+                        callback();
+                    }
                 }
 
                 IgniteRendering.ReadyCallbacks = [];
@@ -567,12 +600,11 @@ class IgniteRendering {
         }
     }
 
+    /**
+     * Returns whether or not we are currently in a rendering state.
+     */
     static get rendering() {
-        if (IgniteRendering.RenderCount && IgniteRendering.RenderCount > 0) {
-            return true;
-        }
-
-        return false;
+        return IgniteRendering.RenderCount && IgniteRendering.RenderCount > 0;
     }
 }