What's the diference between app-header and paper-header-panel, that is the same question for app-toolbar and paper-toolbar, is about Polymer version? Cause I was following this tutorial, but I'n trying to build a Condensing header with sticky paper-tabs on top with the currents Polimer Elements(paper-header-panel, paper-toolbar), and I can't get the exactly sticky paper-tab like the example.
Thanks for your time, I would appreciate any help!
The polymer catalog is divided into a couple different categories enabling greater choice and control for developers.
App elements enable building full web apps out of modular custom elements
Paper elements are a set of visual elements that implement Google's Material Design.
There is overlap between some App elements and Paper elements; and in many cases, Paper elements build on top of App elements.
The primary difference is that App elements are unstyled where Paper elements are styled to meet the Google Material Design.