what is react?

React is a JavaScript library for building user interfaces. It was created and is maintained by Facebook and is widely used for building web applications and mobile apps. React allows developers to build reusable UI components and manage the state of an application in a efficient way.

React uses a virtual DOM (Document Object Model) that optimizes updates and improves the performance of an application. It also uses a component-based architecture, which allows developers to break down an application into small, reusable pieces of code.

React also has a feature called JSX, which is a syntax extension for JavaScript that allows developers to write HTML-like elements in their JavaScript code.

React is often used in conjunction with other libraries and frameworks, such as Redux for state management, and React Router for client-side routing.

React is also widely adopted and has a big community supporting it with a lot of packages and tutorials to help developers to build their applications.