 
   _renderAttr = (o) ->
     attributes = ''
+    return attributes if !o
     for key, val of o
       continue unless notAttr.indexOf(key) is -1
       if key is 'style'

    return """<#{tag}#{_renderAttr(attributes)}>#{_renderChildren(children)}</#{tag}>"""

  $.append = (parent,child) ->
    parent.children.push child

  $.prepend = (parent,child) ->
    parent.children.splice 0, 0, child

  $.mergeattributes = (attributes1,attributes2) ->
    # merge shared key values where value is same type, preferring attributes1, otherwise fallback to attributes2
    attributes = {}
    for key, val of attributes1

        else if (typeof v1 is 'string') and (typeof v2 is 'string')
          attributes[key] += v1 + " " + v2
        else if (typeof v1 is 'object') and (typeof v2 is 'object')
          # TODO: not clone
          # clone to not disrupt $h!t up the closures
          v2 = JSON.parse JSON.stringify v2
          # prefer styles from attributes1
