This is an experiment of an infinite scroller with Dart and Polymer.
This demo provides 3 loading views: click on the corresponding menu to change the view used when new lines are loaded.
A online demonstration can be seen here
Warning: when new lines are added all elements are refreshed which is, in term of performance, very bad !
I think this is due to the template repeat polyfill implementation. If you any idea how to solve this issue, please contribute to this experiment and send a push request