All of these specs now pass

Author: wied03

Diff for: lib/react/opal/native_element.rb

@@ -19,5 +19,31 @@ def initialize(native)
     def element_type
       self.JS[:type]
     end
+
+    def on(event_name)
+      name = event_name.to_s.camelize
+
+      prop_key = "on#{name}"
+
+      if React::Event::BUILT_IN_EVENTS.include?(prop_key)
+        callback =  %x{
+          function(event){
+            #{yield React::Event.new(`event`)}
+          }
+        }
+      else
+        callback = %x{
+          function(){
+            #{yield *Array(`arguments`)}
+          }
+        }
+      end
+
+      new_prop = `{}`
+      `new_prop[prop_key] = #{callback}`
+
+      cloned = `React.cloneElement(#{self}, #{new_prop})`
+      React::NativeElement.new cloned
+    end
   end
 end