AWS, JavaScript, React - Deploy Web Apps on the Cloud - What Is React?

React is a JavaScript library for building user interfaces, maintained by Facebook. Unlike frameworks like Angular and Vue, React is unopinionated, offering minimal built-in functionality. Developers can build websites, mobile, and desktop apps with React, using additional tools like React Native and Electron. React's efficiency comes from its use of a virtual DOM. Major companies like Facebook, Netflix, and Airbnb use React. The React community has developed numerous libraries, making it a popular choice for web development.

What is the significance of the virtual DOM in React?

Name some companies that use React.