In this chapter, you implemented some specific Relay and GraphQL ideas. Starting with the GraphQL schema, you learned how to declare the data that's used by the application and how these data types resolve to specific data sources, such as microservice endpoints. Then, you learned about bootstrapping GraphQL queries from Relay in your React Native app. Next, you walked through the specifics of adding, changing, and listing todo items. The application itself uses the same schema as the web version of the Todo application, which makes things much easier when you're developing web and native React applications.

Well, that's a wrap for this book. We've gone over a lot of material together, and I hope that you've learned from reading it as much as I have from writing it. If there was one theme from this book that you should walk away with, it's that React is simply a rendering abstraction. As new rendering targets emerge, new React libraries will emerge as well. As developers think of novel ways to deal with state at scale, you'll see new techniques and libraries released. My hope is that you're now well prepared to work in this rapidly evolving React ecosystem.