React (JavaScript library)

React is a JavaScript library used for building user interfaces, especially websites and web applications. It allows developers to create reusable components—like building blocks—that can efficiently update and display data in real-time. React's approach makes it easier to develop complex, interactive interfaces by managing how the user sees information and responds to actions. It uses a virtual DOM, a lightweight copy of the actual webpage, to update only the necessary parts quickly, resulting in faster performance. Overall, React helps create dynamic, responsive web experiences with organized, maintainable code.