Fix refs bug

Author: zetachang

example/react-tutorial/example.rb

@@ -46,12 +46,12 @@ def render
 
     f.on(:submit) do |event|
       event.prevent_default
-      author = self.refs.author.getDOMNode().value.strip
-      text = self.refs.text.getDOMNode().value.strip
+      author = self.refs[:author].dom_node.value.strip
+      text = self.refs[:text].dom_node.value.strip
       return if !text || !author
       self.emit(:comment_submit, {author: author, text: text})
-      self.refs.author.getDOMNode().value = ""
-      self.refs.text.getDOMNode().value = ""
+      self.refs[:author].dom_node.value = ""
+      self.refs[:text].dom_node.value = ""
     end
   end
 end

example/todos/app/components/todo_item.react.rb

@@ -30,8 +30,8 @@ def render
         end
         label { self.edit_text }.on(:double_click) do
           # set on state will trigger re-render, so we manipulate the DOM after render done
-          self.set_editing(true) do
-            self.refs.input.getDOMNode.focus
+          self.set_state(editing: true) do
+            self.refs[:input].dom_node.focus
           end
           self.edit_text = params[:todo].title
         end