# File input (UI SDK): Upload button

> A trigger alone opens the system file picker. Without `multiple`, a new file replaces the current one, and the root’s children can be a function of its state.

Canonical: https://hextaui.com/docs/ui-sdk-file-input/examples/button

Component docs: https://hextaui.com/docs/ui-sdk-file-input

## Add this example

```bash
npx shadcn@latest add https://hextaui.com/r/ui-sdk-file-input-button.json
```

This adds `components/examples/ui-sdk-file-input/button.tsx` with the File input component and the HextaUI theme tokens.

## Source

```tsx title="components/examples/ui-sdk-file-input/button.tsx"
"use client"

import { IconUpload } from "@tabler/icons-react"

import { FileInput, FileInputTrigger } from "@/components/ui/ui-sdk-file-input"

function UiSdkFileInputButton() {
  return (
    <FileInput accept=".pdf,.doc,.docx">
      {(state) => (
        <div className="flex min-w-0 items-center gap-3">
          <FileInputTrigger>
            <IconUpload aria-hidden="true" />
            {state.value[0] ? "Replace resume" : "Upload resume"}
          </FileInputTrigger>
          <span className="min-w-0 truncate text-sm text-muted-foreground">
            {state.value[0]?.name ?? "No file chosen"}
          </span>
        </div>
      )}
    </FileInput>
  )
}

export { UiSdkFileInputButton }
```

## Props in this example

### FileInput

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `accept` | `string \| string[]` | – |  |

## More File input examples

- [Accepted types and limits](https://hextaui.com/docs/ui-sdk-file-input/examples/limits)
- [Image previews](https://hextaui.com/docs/ui-sdk-file-input/examples/images)
- [Prompt attachments](https://hextaui.com/docs/ui-sdk-file-input/examples/attachments)
- [Page-wide drop](https://hextaui.com/docs/ui-sdk-file-input/examples/page-drop)
- [Folders](https://hextaui.com/docs/ui-sdk-file-input/examples/folders)
- [Controlled](https://hextaui.com/docs/ui-sdk-file-input/examples/controlled)
- [Form](https://hextaui.com/docs/ui-sdk-file-input/examples/form)
- [Invalid](https://hextaui.com/docs/ui-sdk-file-input/examples/invalid)
- [Disabled](https://hextaui.com/docs/ui-sdk-file-input/examples/disabled)
- [Right to left](https://hextaui.com/docs/ui-sdk-file-input/examples/rtl)