github.com/facebook/react ↗

About facebook/react

React is a JavaScript library for building user interfaces with a declarative programming model. It allows developers to design simple views for each state in an application, and React automatically updates and renders only the necessary components when data changes. This approach makes code more predictable and easier to debug.

The library is built around a component-based architecture where encapsulated components manage their own state and can be composed together to create complex UIs. Since component logic is written in JavaScript rather than templates, developers can pass rich data through applications and keep state management separate from the DOM. React uses JSX, an HTML-like syntax, to make code more readable, though it is not required to use the library.

React is designed for gradual adoption and can be integrated into existing projects in varying degrees. The library can render on the server using Node and power mobile applications through React Native, making it flexible across different technology stacks. The project is open-source under the MIT license and welcomes community contributions through its GitHub repository, with extensive documentation and learning resources available on the React website.