adds haml like data param typing, closes #99

# Conflicts:
#	lib/react/top_level.rb
#	spec/react/dsl_spec.rb

Author: adamcreekroad

lib/react/api.rb

@@ -108,6 +108,8 @@ def self.convert_props(properties)
           props["className"] = value
         elsif ["style", "dangerously_set_inner_HTML"].include? key
           props[lower_camelize(key)] = value.to_n
+        elsif React::HASH_ATTRIBUTES.include?(key) && value.is_a?(Hash)
+          value.each { |k, v| props["#{key}-#{k.tr('_', '-')}"] = v.to_n }
         else
           props[React.html_attr?(lower_camelize(key)) ? lower_camelize(key) : key] = value
         end

lib/react/top_level.rb

@@ -34,6 +34,8 @@ module React
                 strokeOpacity strokeWidth textAnchor transform version
                 viewBox x1 x2 x xlinkActuate xlinkArcrole xlinkHref xlinkRole
                 xlinkShow xlinkTitle xlinkType xmlBase xmlLang xmlSpace y1 y2 y)
+  HASH_ATTRIBUTES = %w(data aria)
+
 
   def self.html_tag?(name)
     tags = HTML_TAGS

spec/react/dsl_spec.rb

@@ -136,6 +136,32 @@ def render
     expect(React.render_to_static_markup(React.create_element(Foo))).to eq('<div>Hello&nbsp;&nbsp;Goodby</div>')
   end
 
+  it 'should convert a hash param to hyphenated html attributes if in React::HASH_ATTRIBUTES' do
+    stub_const 'Foo', Class.new
+    Foo.class_eval do
+      include React::Component
+      def render
+        div(data: { foo: :bar }, aria: { foo_bar: :foo })
+      end
+    end
+
+    expect(React.render_to_static_markup(React.create_element(Foo)))
+      .to eq('<div data-foo="bar" aria-foo-bar="foo"></div>')
+  end
+
+  it 'should not convert a hash param to hyphenated html attributes if not in React::HASH_ATTRIBUTES' do
+    stub_const 'Foo', Class.new
+    Foo.class_eval do
+      include React::Component
+      def render
+        div(title: { bar: :foo })
+      end
+    end
+
+    expect(React.render_to_static_markup(React.create_element(Foo)))
+      .to eq('<div title="{&quot;bar&quot;=&gt;&quot;foo&quot;}"></div>')
+  end
+
   it "will remove all elements passed as params from the rendering buffer" do
     stub_const 'X2', Class.new
     X2.class_eval do