React.js is a free, open-source JavaScript library for building user interfaces (UIs). It’s used to create websites, mobile apps, and desktop apps.
How React works
- React combines short, independent code fragments called components into complex UIs.
- React uses a virtual DOM to mimic a DOM tree, which helps keep React components up to date.
- React follows a unidirectional data flow, which makes it easier to debug errors.
Why use React
- React is efficient and fast.
- React’s component-based architecture makes it easy to break down complex UIs into manageable parts.
- React’s ability to create reusable components makes it ideal for rapid prototyping.
Who uses React
- Facebook developed React.
- React is used by Netflix, Airbnb, WhatsApp Web, Discord, Imgur, Bleacher Report, Feedly, SeatGeek, and HelloSign.
Learn more
- You can learn more about React in a tutorial on MDN.
- You can also check out a step-by-step guide on GitHub to learn how to build an app using React.
