Find the smallest contract that solves the behavior.

Action primitive for native buttons, links, and custom button-like elements.

Headless text-copy behavior with coordinated value, native controls, truthful asynchronous status, and accessible authored feedback.

Headless single-control field wiring for labels, descriptions, errors, and shared form-control state.

Native field group primitives for a shared legend, description, error, and disabled/required/invalid state.

Headless native file-picker, dropzone, validation, selected-file collection, and removal primitives.

Native form primitive with lightweight submit validation and observable submit state.

Native single-line input primitive with controlled value state, Field wiring, and an optional clear control.

Server-safe native label primitive with optional state metadata.

Headless numeric text input with spinbutton semantics.

One-time password input coordination across multiple visible cells and one hidden form value.

Password input with controlled visibility state and a keyboard-accessible show/hide toggle.

Headless press interaction primitive for custom interactive surfaces.

Native textarea behavior with controlled value state, Field integration, optional auto-resize, and a count display.

Headless toggle button primitive for on/off command state.

Headless group of toggle buttons with roving focus and single or multiple selection.

Checkbox state with indeterminate support and optional native form participation.

Headless primitives for managing a named set of independent checkbox choices.

Headless editable combobox primitives for filtering suggestions and selecting a value from a listbox.

Headless listbox primitives for choosing one or more options from a visible option list.

Headless compact multi-value selection primitives.

Headless single-selection radio group with roving focus.

Headless slider-like rating input with fractional values and decorative item parts.

Single-value select with a combobox trigger, popup listbox, option collection, scroll controls, portal, and a visually hidden native form control.

Headless slider primitives for single-value and range inputs.

Headless on/off switch with optional native form participation.

Semantic application header structure for top-level app content and controls.

Navigation landmark with active-destination state for a small set of primary application destinations.

Navigation landmark that shows the current page's place in a hierarchy.

Headless menu primitives that open at a pointer location or from the keyboard to present actions for a specific area.

Headless button-triggered menu primitives for actions and compact choices.

Headless native navigation primitive for anchors and router link adapters.

Headless menu primitives for command menus, selection menus, groups, separators, and nested submenus.

Headless horizontal or vertical menubar primitives for application-style menu systems.

Headless navigation list primitives for sidebars, page navigation, and grouped route lists.

Headless navigation disclosure primitives with trigger-driven panels, indicator geometry, and a shared viewport.

Headless pagination primitives with stable page range calculation.

Headless app-sidebar primitives for expanded, rail, and offcanvas layout states.

Headless tab primitives for switching between related panels.

Headless ARIA toolbar primitives for grouped controls with roving keyboard navigation.

Modal alert dialog behavior for urgent confirmations and decisions that require an answer before the user can continue.

Headless modal dialog primitives with focus containment, dismissal, accessible naming, and compound state management.

Headless modal side-sheet primitives with drawer-specific parts and placement metadata.

Headless hover-and-focus preview primitives with delayed disclosure and floating positioning.

Shared foundation for modal dialog behavior, focus management, portals, titles, descriptions, and close controls.

Positioned disclosure content with optional anchor, modal behavior, focus guards, arrow geometry, and close controls.

Toast provider, store, live announcements, viewport, and dismissible toast parts.

Supplemental text disclosure for hover, focus, and long-press interactions.

Headless ARIA grid primitives for two-dimensional cell navigation and optional row selection.

Headless WAI-ARIA feed primitives for focusable article streams whose content may load or change while users read.

Server-safe native primitives for ordered and unordered static lists.

Headless structure for scrollable content.

Headless swipe actions for list-like items.

Headless native table anatomy with caption, sections, rows, cells, and sortable header metadata.

Headless hierarchical tree primitives for expandable one-dimensional navigation and selection.

Headless hierarchical grid primitives combining tree expansion with grid cell navigation.

Disclosure sections with linked triggers, panels, and keyboard navigation.

Structural wrapper that keeps its content at a stable width-to-height ratio.

Image, loading fallback, and grouping primitives for representing a person or other named entity.

Small semantic wrapper for contextual labels, counts, and status text.

Headless disclosure primitives for showing and hiding one section of content.

Headless primitive for separating nearby content visually or semantically.

Headless source-loading and fallback primitives for ordinary images. Image owns source status, safe transitions, conditional content/fallback rendering, native image props, and composition. It owns no styling, optimizer, retry, or artwork.

Determinate and indeterminate progressbar primitive.

Skip navigation link and focus target primitives.

Headless utilities for registering elements by value and navigating them in document order.

Headless direction context for mirroring Atom behavior in left-to-right and right-to-left interfaces.

Atom exports small hooks for controlled state, disclosure, presence, dismissal, focus, scrolling, and shared interaction behavior.

Utility for rendering children into another DOM container.

Headless virtual collection measurement helpers for rendering only the visible part of large lists.

Accessible content that is hidden from visual rendering.