This document discusses building isomorphic JavaScript applications. It begins by explaining the benefits of isomorphic apps such as delivering the best experience to all users regardless of device or browser capabilities. It then describes how to build isomorphic apps using Node.js, a microservice architecture, and React for a unified coding experience. Finally, it highlights how isomorphic apps with React make development more productive and enjoyable by fixing the DOM issues and allowing developers to focus on what to build rather than how to build it.