title: Do we really need to use polymer?
body: <p>I am very interested in polymer when learning Dart, which make it possible for building repeatable complex web components in web application. My question is, is it possible to simply build these repeatable components with native JavaScript(without Dart), do we really need to integrate Polymer to our client side code?</p>
  
  <p>PS. I guess for some web application like game would use some complex components very often.</p>