Accordion

Preview

Rendered from the story the storybook (a11y) CI gate runs axe against — the preview can't show something that hasn't been verified.

Install

Two equivalent paths — the URL works in any shadcn-CLI setup; the alias works once you've registered @interlace in your components.json.

npx shadcn@latest add https://ds.interlace.tools/r/accordion.json

npx shadcn@latest add @interlace/accordion

Import

5 named exports — pull the parts you need.

import { Accordion, AccordionContent, AccordionItem, AccordionTrigger, MIN_VIEWPORT } from '@/components/ui/accordion';

Anatomy

Extracted from the primitive's JSDoc header. The source is the only documentation that can't drift.

Accordion                        (Base UI Accordion.Root — data-min-viewport=320)
    └─ AccordionItem               (border-b, dropped on the last item)
         ├─ AccordionTrigger       (Accordion.Header > Accordion.Trigger + ChevronDownIcon)
         └─ AccordionContent       (Accordion.Panel > div)
Every node above carries a `data-slot`, including the two that used not to:
the `Accordion.Header` around the trigger button (`accordion-header`) and the
padding `div` inside the panel (`accordion-content-inner`).

API reference

Parsed from the type declarations in the source — the same file the install writes into your tree, so this table can't drift from the component you get.

Accessibility

Every story for this component is rendered headlessly and checked with axe-core (wcag2aa, wcag22aa, best-practice, ACT) on every PR. That gate has no continue-on-error, so what ships has zero known violations.

What follows is what static analysis can see. Axe cannot press a key and never sees an overlay open, so the operable-without-a-mouse claim lives in Behavior instead, where the keyboard path is replayed step by step.

Focus + keyboard behaviour

Owned by @base-ui/react/accordion — focus trapping, dismissal and typeahead come from the headless primitive, not from us.

Focus ring (WCAG 2.2 SC 2.4.13)

Inherited from the preflight focus contract shipped in @interlace/theme.

Reduced motion

No animation to gate.

ARIA in the source

None — semantics come from the element or the Base UI primitive rather than hand-written ARIA.

Examples

2 more states from the same story file.

R-rule compliance

Every primitive in @interlace/ui models to the portable 26-rule floor enforced by the componentApi ESLint preset. The cells below pin exactly where each rule applies in this file.

Dependencies

Base UI primitive

@base-ui/react/accordion

Lucide icons

• ChevronDownIcon

NPM dependencies

• @base-ui/react
• lucide-react

Registry dependencies

• @interlace/theme
• @interlace/cn

Source

The full implementation — components/ui/accordion.tsx once installed.

'use client';

import * as React from 'react';

// @interlace/accordion v1.2.0 — Interlace design system.
// Docs, props and live preview: https://ds.interlace.tools/c/accordion
// What changed since: https://ds.interlace.tools/c/accordion#history
// Generated banner — keep it, the upgrade diff reads this version.

/**
 * @interlace/ui — Accordion
 *
 * A disclosure stack: a column of headers whose panels open and close. Wraps
 * @base-ui/react/accordion — Base UI owns the open state (single or multiple),
 * the keyboard model and every piece of the accordion ARIA.
 *
 * We own the item divider, the trigger row, and the chevron that rotates on
 * `data-panel-open`.
 *
 * ## Anatomy

…126 more lines…

Registry JSON

The raw registry record — what the shadcn CLI fetches.