What is React (or Reactjs) and how it works?
React is defined as a JavaScript library that makes the process painless for creating interactive user interfaces. It was created by Jordan Walke, a software engineer at Facebook, and first deployed on Facebook’s News Feed in 2011. It’s used for single-page or mobile application development.
An open-source & component-based front-end library, ReactJS is ‘V’ in MVC. This implies that it is responsible only for the view layer of the application.
To get things done faster, React implements a virtual DOM, which is a DOM tree representation in Javascript. At its core, React maintains a tree, which is able to do efficient different computations on the nodes. It also enables you to re-construct DOM in Javascript and push those changes to the DOM which have actually occurred.
