# Collapsible: File tree

> Each folder is its own collapsible. Outer panels grow smoothly as inner ones open.

Example: https://hextaui.com/docs/collapsible/examples/file-tree
Component docs: https://hextaui.com/docs/collapsible.md

## Add this example

```bash
npx shadcn@latest add https://hextaui.com/r/collapsible-file-tree.json
```

This adds `components/examples/collapsible/file-tree.tsx` with the Collapsible component and the HextaUI theme tokens.

## Source

```tsx title="components/examples/collapsible/file-tree.tsx"
import { IconChevronRight, IconFile, IconFolder } from "@tabler/icons-react"

import { Button } from "@/components/ui/button"
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
  CollapsibleTriggerIcon,
} from "@/components/ui/collapsible"

type TreeNode = { name: string; children?: TreeNode[] }

const tree: TreeNode[] = [
  {
    name: "components",
    children: [
      {
        name: "ui",
        children: [
          { name: "button.tsx" },
          { name: "collapsible.tsx" },
          { name: "card.tsx" },
        ],
      },
      { name: "theme-provider.tsx" },
    ],
  },
  { name: "app", children: [{ name: "layout.tsx" }, { name: "page.tsx" }] },
  { name: "package.json" },
]

function TreeItem({ node }: { node: TreeNode }) {
  if (!node.children) {
    return (
      <li className="flex h-8 items-center gap-2 ps-8 text-sm">
        <IconFile className="size-4 text-muted-foreground" />
        {node.name}
      </li>
    )
  }

  return (
    <li>
      <Collapsible defaultOpen={node.name === "components"}>
        <CollapsibleTrigger
          render={<Button variant="ghost" size="sm" />}
          className="w-full justify-start"
        >
          <CollapsibleTriggerIcon>
            <IconChevronRight className="transition-transform duration-200 ease-out-cubic group-data-panel-open/collapsible-trigger:rotate-90 motion-reduce:transition-none rtl:-scale-x-100 rtl:group-data-panel-open/collapsible-trigger:-rotate-90" />
          </CollapsibleTriggerIcon>
          <IconFolder className="text-muted-foreground" />
          {node.name}
        </CollapsibleTrigger>
        <CollapsibleContent>
          <ul className="ms-4 border-s ps-1">
            {node.children.map((child) => (
              <TreeItem key={child.name} node={child} />
            ))}
          </ul>
        </CollapsibleContent>
      </Collapsible>
    </li>
  )
}

export function CollapsibleFileTree() {
  return (
    <ul className="w-64">
      {tree.map((node) => (
        <TreeItem key={node.name} node={node} />
      ))}
    </ul>
  )
}
```

## Props in this example

### Collapsible

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `defaultOpen` | `boolean` | `false` |  |

### CollapsibleTrigger

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `render` | `ReactElement \| (props, state) => ReactElement` | `<button>` | Usually a Button. |

## More Collapsible examples

- [Open by default](https://hextaui.com/docs/collapsible/examples/open-by-default.md)
- [Show more](https://hextaui.com/docs/collapsible/examples/show-more.md)
- [Controlled](https://hextaui.com/docs/collapsible/examples/controlled.md)
- [Disabled](https://hextaui.com/docs/collapsible/examples/disabled.md)
- [Custom icon](https://hextaui.com/docs/collapsible/examples/custom-icon.md)
- [Inside a card](https://hextaui.com/docs/collapsible/examples/card.md)
- [Unmounted when closed](https://hextaui.com/docs/collapsible/examples/unmounted.md)
- [Long content](https://hextaui.com/docs/collapsible/examples/long-content.md)
- [Right to left](https://hextaui.com/docs/collapsible/examples/rtl.md)