This chapter showed you how easy it is to build web apps that work with data using data-binding and web components in Polymer.dart. We did this by exploring three projects: links, category-links, and project-tasks-employee; the last two by building the model starting from the Dartlero framework. Web components through Polymer will revolutionize the way future web apps are built. In the next chapter, we will focus on how to build web apps following the MVC pattern and using the Dartling modeling framework.