snapshot of https://github.com/shadcn-ui/ui.git (main, 2026-09-15; blobs > 131072B omitted)

apps/v4/content/docs/components/base/collapsible.mdx

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+---
+title: Collapsible
+description: An interactive component which expands/collapses a panel.
+base: base
+component: true
+featured: true
+links:
+  doc: https://base-ui.com/react/components/collapsible
+  api: https://base-ui.com/react/components/collapsible#api-reference
+---
+
+<ComponentPreview styleName="base-nova" name="collapsible-demo" align="start" />
+
+## Installation
+
+<CodeTabs>
+
+<TabsList>
+  <TabsTrigger value="cli">Command</TabsTrigger>
+  <TabsTrigger value="manual">Manual</TabsTrigger>
+</TabsList>
+<TabsContent value="cli">
+
+```bash
+npx shadcn@latest add collapsible
+```
+
+</TabsContent>
+
+<TabsContent value="manual">
+
+<Steps className="mb-0 pt-2">
+
+<Step>Install the following dependencies:</Step>
+
+```bash
+npm install @base-ui/react
+```
+
+<Step>Copy and paste the following code into your project.</Step>
+
+<ComponentSource
+  name="collapsible"
+  title="components/ui/collapsible.tsx"
+  styleName="base-nova"
+/>
+
+<Step>Update the import paths to match your project setup.</Step>
+
+</Steps>
+
+</TabsContent>
+
+</CodeTabs>
+
+## Usage
+
+```tsx showLineNumbers
+import {
+  Collapsible,
+  CollapsibleContent,
+  CollapsibleTrigger,
+} from "@/components/ui/collapsible"
+```
+
+```tsx showLineNumbers
+<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`:
+
+```text
+Collapsible
+├── CollapsibleTrigger
+└── CollapsibleContent
+```
+
+## Controlled State
+
+Use the `open` and `onOpenChange` props to control the state.
+
+```tsx showLineNumbers
+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>
+  )
+}
+```
+
+## Basic
+
+<ComponentPreview
+  styleName="base-nova"
+  name="collapsible-basic"
+  align="start"
+/>
+
+## Settings Panel
+
+Use a trigger button to reveal additional settings.
+
+<ComponentPreview styleName="base-nova" name="collapsible-settings" />
+
+## File Tree
+
+Use nested collapsibles to build a file tree.
+
+<ComponentPreview
+  styleName="base-nova"
+  name="collapsible-file-tree"
+  previewClassName="h-[36rem]"
+/>
+
+## RTL
+
+To enable RTL support in shadcn/ui, see the [RTL configuration guide](/docs/rtl).
+
+<ComponentPreview
+  styleName="base-nova"
+  name="collapsible-rtl"
+  direction="rtl"
+  align="start"
+/>
+
+## API Reference
+
+See the [Base UI](https://base-ui.com/react/components/collapsible#api-reference) documentation for more information.