What Is ReactJS?

React (a.k.a. ReactJS or React.js) is a JavaScript library for creating user interfaces, open sourced to the world by Facebook and Instagram team in 2013. One might think of it as the “View” in the “Model-View-Controller” pattern 

React delivers on the hype. Pretty much any size project can successfully use React and it excels in delivering on all the key things we look for in a framework while addressing the most frequent criticisms. React Native also looks like a game changer.