React Aria
React Aria is a library of React Hooks that provides accessible UI primitives for building design systems and components. It focuses on implementing WAI-ARIA (Web Accessibility Initiative - Accessible Rich Internet Applications) specifications, handling keyboard navigation, focus management, and screen reader support. It is part of Adobe's open-source React Spectrum design system, designed to be headless and work with any styling solution.
Developers should use React Aria when building custom, accessible UI components in React applications, especially for design systems, complex widgets like date pickers or comboboxes, or projects requiring high accessibility compliance. It is ideal for teams that need to ensure their components are usable by people with disabilities while maintaining full control over styling and behavior, avoiding the limitations of pre-styled component libraries.