What is react.js?

Answer 1

React is a JavaScript library for building user interfaces. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications, as it is optimal for fetching rapidly changing data that needs to be recorded. 

Answer 2

Get more information from here..

https://reactjs.org/tutorial/tutorial.html

Answer 3

Than Zaw Htet well explained 🙂

Answer 4

🚩Difference of "React JS" and "React Native"🚩
React JS is front end library developed by Facebook. It’s used for handling view layer for web and mobile apps. ReactJS allows us to create reusable UI components. It is currently one of the most popular JavaScript libraries and it has strong foundation and large community behind it.

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 React JS to build your components, and implements ReactJS under the hood.
Cookie, I hope that's a little bit help for you.

Answer 5

React.JS is a 
"JavaScript Library" for building user interfaces. It is maintained by Facebook and a community of individual developers and companies.
JavaScript library is a library of pre-written JavaScript which allows for easier development of JavaScript-based applications.

Answer 6

We can develop mobile applications in react.js ?

Answer 7

Jason Kennedy I'm not getting it

Answer 8

no..you need react native for apps

react just makes it possible for live page updating while react native allows you to compile code for applications.