React Spectrum is a collection of libraries and tools developed by Adobe that implement the Spectrum design system in React, enabling developers to build accessible, consistent, and adaptive user interfaces. It is composed of multiple layers, including React Spectrum for styled components, React Aria for accessibility and interaction logic, and React Stately for state management, creating a modular architecture that separates behavior, state, and presentation. The library is designed to provide out-of-the-box accessibility, supporting keyboard, mouse, and touch interactions while adhering to WAI-ARIA standards. It also includes built-in internationalization features, supporting multiple languages, right-to-left layouts, and localized formatting for dates and numbers. ...