Headless UI Components

Headless UI is an open-source unstyled component library created by the Tailwind CSS team at Tailwind Labs in 2020, providing fully accessible, unstyled UI components for React and Vue that handle all the complex accessibility logic, keyboard navigation, aria attributes, and focus management while leaving all visual styling to the developer, designed to work seamlessly with utility-first CSS frameworks like Tailwind CSS but compatible with any styling approach including CSS modules, styled-components, and plain CSS, adopted by thousands of applications built with Tailwind CSS. The component catalog includes interactive elements that are notoriously difficult to build correctly from scratch, such as menus with keyboard navigation and arrow key selection, listboxes with typeahead and multiselect support, comboboxes with filtering and async option loading, switches with proper aria roles, tabs with arrow key navigation and focus management, dialogs and modals with focus trapping and scroll locking, popovers with positioning and outside click handling, radio groups with keyboard navigation, and disclosure panels with expand and collapse transitions. Each component provides render prop or slot-based APIs that give developers complete control over the rendered HTML structure and visual appearance, with the component handling only the behavioral logic, state management, and accessibility requirements while the developer controls every aspect of styling through class names and custom markup. The accessibility compliance follows WAI-ARIA Authoring Practices, with screen reader announcements, keyboard navigation matching native HTML element behavior, focus management that traps focus within modals and restores focus on close, and aria attributes automatically managed based on component state. Designed for developers using Tailwind CSS.