To build a complete web application with React from scratch, there are many important details you need to conside. A framework can solve these problems. But such a framework must have the right level of abstraction — otherwise it won’t be very useful. It also needs to have great Developer Experience, ensuring you and your team have an amazing experience while writing code.
ReactJS is an open-source JavaScript library that is used for building user interfaces specifically for single-page applications. It’s used for handling the view layer for web and mobile apps. React also allows us to create reusable UI components. React was first created by Jordan Walke, a software engineer working for Facebook. React first deployed on Facebook’s newsfeed in 2011 and on Instagram.com in 2012.