<cosmoz-data-nav> is a navigator that can be used to display items from a list one at time.
Install the Polymer-CLI
First, make sure you have the Polymer CLI installed. Then run
polymer serve to serve your element locally.
Viewing Your Element
$ polymer serve
$ polymer test
Your application is already set up to be tested via web-component-tester. Run
polymer test to run your application's test suite locally.
Cross-browser Testing Platform and Open Source <3 Provided by Sauce Labs