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.

Tree API

View component

The full prop reference for the Tree component. A hierarchical list, like a file explorer.

Import

tsx

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

Props

Tree.Root

Root component for the tree; manages expanded, selected, and focused states. Extends ul element.

Prop	Type	Default
asChild#	`boolean` Replace element with first child and merge props	—
defaultExpanded#	`string[]` Initial expanded item IDs (uncontrolled)	[]
expanded#	`string[]` Controlled expanded item IDs	—
onExpandedChange#	`(expanded: string[]) => void` Callback when expanded items change	—
defaultSelected#	`string` Initial selected item ID (uncontrolled)	—
selected#	`string` Controlled selected item ID	—
onSelectedChange#	`(id: string \| undefined) => void` Callback when selected item changes	—
className#	`string` CSS class names (styled adds 'text-sm' default)	—
ref#	`React.Ref<HTMLUListElement>` Forward ref to underlying ul element	—

Tree.Item

Container for a tree item. Extends li element. Must be a direct child of Root or Group.

Prop	Type	Default
id#	`string` Unique identifier for the tree item (required)	—
asChild#	`boolean` Replace element with first child and merge props	—
hasChildren#	`boolean` Whether this item has child items (shows expand chevron)	false
level#	`number` Nesting level for accessibility (aria-level)	1
className#	`string` CSS class names	—
ref#	`React.Ref<HTMLLIElement>` Forward ref to underlying li element	—

Tree.Trigger

Clickable trigger for item expansion and selection. Extends div element.

Prop	Type	Default
hasChildren#	`boolean` When false, hides the expand chevron icon (styled only)	—
className#	`string` CSS class names (styled adds default styles for layout, hover, focus ring)	—
onClick#	`(event: React.MouseEvent<HTMLDivElement>) => void` Native click handler (composed with selection/expansion logic)	—
onFocus#	`(event: React.FocusEvent<HTMLDivElement>) => void` Native focus handler (composed with focus tracking)	—
onKeyDown#	`(event: React.KeyboardEvent<HTMLDivElement>) => void` Native keydown handler (composed with keyboard navigation: Arrow Right/Left for expand/collapse, Enter/Space for select)	—
ref#	`React.Ref<HTMLDivElement>` Forward ref to underlying div element	—

Tree.Group

Container for child tree items. Only renders when parent item is expanded. Extends ul element.

Prop	Type	Default
className#	`string` CSS class names (styled adds left border and left padding)	—
ref#	`React.Ref<HTMLUListElement>` Forward ref to underlying ul element	—

Source code

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