https://facebook.github.io/react/

A JAVASCRIPT LIBRARY FOR BUILDING USER INTERFACES
Declarative views make your code more predictable and easier to debug.
React是Facebook在2013年发布的一个前端框架，而如今的React俨然已经演变成一个前端生态，这个生态圈包含了众多基于React的框架：ReactJS、ReactCanvas、ReactNativeforiOS、ReactNativeforAndroid。由于Facebook的大力支持和众多开发者的追捧，React在前端框架中备受青睐。

react vs react native

ReactJS is a JavaScript library, supporting both front end web and being run on the server, for building user interfaces and web applications.
React Native is a mobile framework that compiles to native app components, allowing you to build native mobile applications (iOS, Android, and Windows) in JavaScript that allows you to use ReactJS to build your components, and implements ReactJS under the hood.
Both are open sourced by Facebook.

系列教程

• https://hulufei.gitbooks.io/react-tutorial/content/introduction.html