What is React?
React is a Javascript based UI development library. Open source developer & facebook community run react. Although React is a library rather than a language, it is widely used in web development. The library first appeared in May 2013 and is now one of the most used frontend libraries for web development & services.
React makes it painless to create interactive user interface. Design simple views for each state in your application, and React will efficiently update & render just the right components when your data changes. React offers a variety of extensions for architectural support throughout the application, such as Flux and React Native, beyond just the UI.