structyl is an open-source, TypeScript-first React component library with 90+ accessible components. It combines WAI-ARIA compliant headless primitives with Tailwind CSS v4 styled wrappers, a runtime theming system, and a first-class DataTable — all in independently-versioned npm packages.

How does structyl differ from shadcn/ui?

structyl ships as actual npm packages (pnpm add @structyl/styled) rather than copy-paste code snippets. It adds a runtime theming system that switches themes without a page reload, a feature-complete DataTable, 24+ React hooks, and 90+ components — significantly more than shadcn/ui out of the box.

How does structyl compare to Radix UI?

structyl builds on the same headless-first philosophy as Radix UI but adds a complete Tailwind-styled layer, runtime theming with CSS variables, dark mode, a DataTable, and chart components. Radix is primitives-only; structyl is a full component library ready to use.

Is structyl compatible with Next.js App Router?

Yes. All structyl components that use React hooks are marked with 'use client'. The library is SSR-safe and fully compatible with Next.js 15 App Router and React Server Components.

Does structyl support dark mode?

Yes. structyl includes a ThemeProvider that supports system, light, and dark modes. Theme switches happen instantly using CSS custom properties — no page reload required and no flash of unstyled content.

How do I install structyl?

Install the main package with: pnpm add @structyl/styled (or npm install @structyl/styled). Then wrap your app in ThemeProvider from @structyl/themes and add Toaster from @structyl/styled to your root layout.

Is structyl free and open source?

Yes. structyl is MIT licensed and completely free. All packages are published to npm under the @structyl scope.

Does structyl support TypeScript?

Yes. structyl is built with TypeScript strict mode throughout. All components export their prop types and the library ships with full type definitions. There is no any usage in the public API.

What styling system does structyl use?

structyl uses Tailwind CSS v4 for styling, tailwind-variants for type-safe variant APIs, and tailwind-merge for class conflict resolution. All colors and design tokens are CSS custom properties that integrate with the runtime theming system.

Does structyl have a DataTable component?

Yes. structyl includes a first-class DataTable in the @structyl/data-table package, built on @tanstack/table-core. It supports sorting, multi-column filtering, pagination, row selection, column resizing, and row virtualization via @tanstack/react-virtual.

Hover Card API

View component

The full prop reference for the Hover Card component. A rich popover shown when an element receives hover.

Import

tsx

import { HoverCard } from '@structyl/styled';

Props

Root

Wrapper component that manages hover card state and timing

Prop	Type	Default
children#	`React.ReactNode` Content to render inside the hover card root	—
open#	`boolean` Controlled open state of the hover card	—
defaultOpen#	`boolean` Initial open state when uncontrolled	false
onOpenChange#	`(open: boolean) => void` Callback fired when the open state changes	—
openDelay#	`number` Delay in milliseconds before the card opens on hover	700
closeDelay#	`number` Delay in milliseconds before the card closes after pointer leaves	300

Trigger

Anchor element that triggers the hover card. Renders as <a> by default, accepts all HTML anchor attributes

Prop	Type	Default
asChild#	`boolean` If true, merges props onto child element instead of rendering as anchor	—
className#	`string` CSS class names to apply to the trigger element	—

Portal

Portal container that renders the hover card content outside the DOM tree

Prop	Type	Default
children#	`React.ReactNode` Content to render in the portal	—
container#	`Element \| DocumentFragment \| null` DOM element where the portal should be rendered (defaults to document.body)	—
forceMount#	`boolean` If true, renders content regardless of open state	—

Content

Styled container for hover card content with positioning and animations

Prop	Type	Default
className#	`string` CSS class names merged with default styled classes	—
align#	`'start' \| 'center' \| 'end'` Vertical alignment of content relative to trigger	'center'
side#	`'top' \| 'right' \| 'bottom' \| 'left'` Side of the trigger where content should appear	—
sideOffset#	`number` Distance in pixels from the trigger element	4
alignOffset#	`number` Offset in pixels for the alignment position	—
arrowPadding#	`number` Padding between arrow and edge of content	—
avoidCollisions#	`boolean` If true, adjusts position to avoid viewport collisions	—
collisionPadding#	`number` Padding between content and viewport edges when avoiding collisions	—
asChild#	`boolean` If true, merges props onto child element instead of rendering as div	—
forceMount#	`boolean` If true, renders content regardless of open state	—

Arrow

SVG arrow pointing from content toward trigger

Prop	Type	Default
width#	`number` Width of the arrow element	—
height#	`number` Height of the arrow element	—
className#	`string` CSS class names to apply to the arrow	—

Source code

If you didn't find what you need here, read the component implementation .