<p>React is a new, open-source technology from Facebook that has stirred quite a storm in the web development community, and some would say it’s the next best thing to a silver bullet for building web applications. React: Up and Running, is for anyone who is interested in learning React, building components for an app and building maintainable apps. Users will learn how to get off the ground with React, assuming no prior knowledge. This book teaches you how to build components, the building blocks of your apps, as well as how to organize the components into large-scale apps. In addition, you’ll learn about unit testing and optimizing performance, while focusing on the application’s data (and letting the UI take care of itself).</p>