React is a popular JavaScript library for building user interfaces. Developed and maintained by Facebook, it enables developers to create dynamic and interactive web applications. React follows a component-based architecture, allowing developers to build UI elements as modular components and manage the state efficiently.
It employs a virtual DOM (Document Object Model) to optimize rendering, improving the application's performance by selectively updating only the necessary parts of the page.
React is widely used for single-page applications where user interfaces need to be responsive and data-driven. Its declarative syntax simplifies the process of building complex UIs, making it a go-to choice for developers aiming to create efficient and maintainable web applications.