React is a JavaScript library by Facebook that aims to easily create complex UIs. Unlike other JavaScript libraries, no textual templates here, no pseudo-code, React allows you to use the full expressiveness of JavaScript. The purpose of React is to provide a solution for building complex applications with data that change over time by writing a set of simple reusable and testable components. We will see how to use React in your Web application and how to ... the full power of that wonderful library through technologies like ES6 and Web Components.