This is a demo showing the Polymer-Project from Google running in a Opera 12 browser, the official project doesn't support that browser, but the browser has all the feature needed to run it. So I made it partial compatible forking the Polymer Project.
This code is running in a actual project I'm working on and it's build on RequireJS.
The only platform module isn't running yet is ShadowDOM, because it need to fix bugs with requirejs yet.
For more info, there is forks from Polymer in my github: https://github.com/gartz?tab=repositories
HTMLImports https://github.com/gartz/HTMLImports
TemplateBinding https://github.com/gartz/TemplateBinding
CustomElements https://github.com/gartz/CustomElements