# Collapsible

> A minimal show/hide primitive built on Base UI's Collapsible. A trigger toggles a height-animated panel — perfect for read-more text, FAQ rows, nested groups and expandable log output. Controlled or uncontrolled via open / defaultOpen, with data-panel-open styling hooks. Ships Collapsible, CollapsibleTrigger and CollapsiblePanel (also exported as CollapsibleContent).

- Author: [Cnippet](https://21st.dev/@cnippet.dev)
- License: mit
- Tags: Disclosure, Expandable, Base UI, Collapsible
- npm dependencies: @base-ui-components/react
- Live preview: https://21st.dev/@cnippet.dev/components/cnippet-collapsible

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/cnippet.dev/cnippet-collapsible?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/disclosure.md