聚合物纸张输入不工作或呈现。

I am trying to use the paper-input element in my page, but it didn't seem to work. I then tried to run the code for the demo on the Polymer site, but that didn't work either, and I was getting simple text fields rather than Polymer's paper-input element. I am using the exact same code as the sample i.e. I am trying to use the paper-input element in m