A popular framework for developing single-page web applications (SPAs) is React. Created by Facebook, React allows developers to build user interfaces using a component-based architecture, promoting reusability and maintainability. Its virtual DOM efficiently updates and renders components, resulting in enhanced performance and a better user experience. React's ecosystem includes libraries and tools that simplify state management, routing, and testing. This combination makes React a go-to choice for developers aiming to create dynamic, interactive web applications that cater to modern user expectations.