React.js Back in 2013 Facebook open sourced React.js, an open-source JavaScript library for creating user interfaces. In contrast to many other popular frameworks and libraries, React.js did not feature two-way data binding. Instead, at the heart of React.js is the idea to declare completely self-containing UI components. In other words: Components encapsulate everything they need to know for being able to re-render themselves at any time. This approach appeared counter intuitive at firs...