React is a powerful JavaScript library for building user interfaces, primarily for single-page applications. Developed and maintained by Facebook, it emphasizes the efficient rendering of UI components through a virtual DOM. This ensures high performance when updating the view in response to data changes. React utilizes a component-based architecture, allowing developers to build reusable UI components, which enhances maintainability and scalability. Components can manage their own state using Hooks, like `useState` and `useEffect`, allowing for functional, easy-to-read code. The React ecosystem includes supporting libraries and tools such as React Router for navigation and JSX for templating, creating a versatile framework for developing complex applications. With extensive community support and a robust set of tools for testing, optimization, and development, React continues to be a popular choice for modern web development projects.

View the most prominent open source React projects in the list below. Click on a specific project to view its alternative or complementary packages.