To get the latest Polymer library and all the bug fixes, please re-run npm install, bower install and grunt commands. Mobile UI Elements is a free, open-source Force.com (unsupported) library to simplify the development of mobile apps. The library, based on the Google’s Polymer framework, provides the fundamental building blocks for creating HTML5 apps that run well on smartphones and tablets. The elements can be mixed together to create fairly complex force.com applications and the apps can be deployed in the browser or embedded inside Container from the Salesforce Mobile SDK. Note: The library is still in heavy development and is missing certain features as well as complete documentation. This document is intended to introduce you to the app's architecture and design and make it as easy as possible for you to jump in, run it, and start contributing.