This books takes you through using React 16 and React Native 0.5 to create powerful and engaging desktop mobile and native applications for all platforms. You start by learning how to craft composable UIs using React, ranging from rendering with JSX and creating reusable components to routing and creating isomorphic applications that run on Node.js. We then move on to show you how to take the concepts of React and apply them to building Native UIs using React Native. You’ll find out how to build responsive and streamlined UIs that can properly handle user interactions in a mobile environment. You’ll also learn how to access device-specific APIs such as the Geolocation API, and how to handle offline development with React Native. You will master handling application state, Unified Information Architecture, and using Flux, Redux, and Relay. Towards the end of the book, you will learn how Flux ideas are encapsulated within React components using Relay and apply all the skills learned so far to create a React application that runs on every major platform.