React also known as React.js or ReactJS is a free and open-source front-end JavaScript library for building user interfaces based on UI components. It is maintained by Meta (formerly Facebook) and a community of individual developers and companies. It’s used for building interactive user interfaces and web applications quickly and efficiently with significantly less code. It allows developers to declaratively describe user interfaces, taking a lot of the heavy lifting out of the coding process while making the code more simple to read and understand. To know more about React JS visit https://reactjs.org