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Collapsible

A trigger-and-panel pair for file trees, advanced settings, and show-more sections — with the neobrutalist borders-and-shadows treatment.

"use client"

import * as React from "react"

The collapsible is the accordion's single-section sibling: one trigger, one panel, open or closed. Built on the Base UI Collapsible component and styled to the neobrutalist recipe: thick borders, hard shadows, and bold type.

Reach for it when:

  • File trees and nested navigation — nest collapsibles to expand folders (see the file tree example below).
  • Advanced settings — keep the common options visible and fold the rest behind a toggle.
  • "Show more" content — long changelogs, truncated lists, optional detail on dense pages.

Installation

pnpm dlx shadcn@latest add https://neobrutalism.com/r/base/collapsible.json
npx shadcn@latest add https://neobrutalism.com/r/base/collapsible.json
yarn dlx shadcn@latest add https://neobrutalism.com/r/base/collapsible.json
bunx --bun shadcn@latest add https://neobrutalism.com/r/base/collapsible.json

Install the following dependencies:

pnpm add @base-ui/react
npm install @base-ui/react
yarn add @base-ui/react
bun add @base-ui/react

Copy and paste the following code into your project.

components/ui/collapsible.tsx
"use client"

import { Collapsible as CollapsiblePrimitive } from "radix-ui"

import { cn } from "@/lib/utils"

function Collapsible({
  ...props
}: React.ComponentProps<typeof CollapsiblePrimitive.Root>) {
  return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />
}

function CollapsibleTrigger({
  ...props
}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleTrigger>) {
  return (
    <CollapsiblePrimitive.CollapsibleTrigger
      data-slot="collapsible-trigger"
      {...props}
    />
  )
}

function CollapsibleContent({
  className,
  ...props
}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleContent>) {
  return (
    <CollapsiblePrimitive.CollapsibleContent
      data-slot="collapsible-content"
      // Radix publishes the measured height as
      // `--radix-collapsible-content-height`; the collapsible-down/up keyframes
      // interpolate against it for a real slide open/close.
      className={cn(
        "overflow-hidden data-[state=open]:animate-collapsible-down data-[state=closed]:animate-collapsible-up",
        className
      )}
      {...props}
    />
  )
}

export { Collapsible, CollapsibleTrigger, CollapsibleContent }

Update the import paths to match your project setup.

Usage

import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible"
<Collapsible>
  <CollapsibleTrigger>Can I use this in my project?</CollapsibleTrigger>
  <CollapsibleContent>
    Yes. Free to use for personal and commercial projects. No attribution
    required.
  </CollapsibleContent>
</Collapsible>

Composition

Use the following composition to build a Collapsible:

Collapsible
├── CollapsibleTrigger
└── CollapsibleContent

Controlled State

Use the open and onOpenChange props to control the state.

import * as React from "react"
 
export function Example() {
  const [open, setOpen] = React.useState(false)
 
  return (
    <Collapsible open={open} onOpenChange={setOpen}>
      <CollapsibleTrigger>Toggle</CollapsibleTrigger>
      <CollapsibleContent>Content</CollapsibleContent>
    </Collapsible>
  )
}

Examples

Basic

import { ChevronDownIcon } from "@/registry/icons/__lucide__"
import { Button } from "@/components/ui/button"
import { Card, CardContent } from "@/components/ui/card"

Settings Panel

Use a trigger button to reveal additional settings.

"use client"

import * as React from "react"

File Tree

Use nested collapsibles to build a file tree.

import { ChevronRightIcon, FileIcon, FolderIcon } from "lucide-react"

import { Button } from "@/components/ui/button"

RTL

To enable RTL support in Neobrutalism.com, see the RTL configuration guide.

"use client"

import * as React from "react"

Accessibility

The collapsible follows the WAI-ARIA Disclosure pattern: the trigger is a real button wired with aria-expanded and aria-controls, so screen readers announce whether the panel is open.

Keyboard interactions:

KeyAction
Tab / Shift + TabMove focus to and from the trigger
Space / EnterToggle the panel

API Reference

See the Base UI documentation for more information.