React is a JavaScript library created by Facebook
React is a User Interface (UI) library
React is a tool for building UI components
What is Babel?
Babel is a JavaScript compiler that can translate markup or programming languages into JavaScript.
With Babel, you can use the newest features of JavaScript (ES6 - ECMAScript 2015).
Babel is available for different conversions. React uses Babel to convert JSX into JavaScript.
What is JSX?
JSX stands for JavaScript XML.
JSX is an XML/HTML like extension to JavaScript.