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shadcn-ui/apps/v4/content/docs/components/base/attachment.mdx
shadcn 18fcf0f766 feat: @shadcn/react (#11022)
* feat(@shadcn/react): add message-scroller package

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* feat(registry): add chat components

Add MessageScroller, Message, Bubble, Attachment, and Marker registry
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---
title: Attachment
description: Displays a file or image attachment with media, metadata, upload state, and actions.
base: base
component: true
---
<ComponentPreview
styleName="base-rhea"
name="attachment-demo"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
The `Attachment` component displays a file or image attachment, its media, name, and metadata, with optional actions and upload state. Use it for files and images in chat composers, message threads, and upload lists.
## Installation
<CodeTabs>
<TabsList>
<TabsTrigger value="cli">Command</TabsTrigger>
<TabsTrigger value="manual">Manual</TabsTrigger>
</TabsList>
<TabsContent value="cli">
```bash
npx shadcn@latest add attachment
```
</TabsContent>
<TabsContent value="manual">
<Steps className="mb-0 pt-2">
<Step>Install the required shadcn/ui dependencies:</Step>
```bash
npx shadcn@latest add button
```
<Step>Copy and paste the following code into your project.</Step>
<ComponentSource
name="attachment"
title="components/ui/attachment.tsx"
styleName="base-rhea"
/>
<Step>Update the import paths to match your project setup.</Step>
</Steps>
</TabsContent>
</CodeTabs>
## Usage
```tsx
import {
Attachment,
AttachmentAction,
AttachmentActions,
AttachmentContent,
AttachmentDescription,
AttachmentMedia,
AttachmentTitle,
} from "@/components/ui/attachment"
```
```tsx
<Attachment>
<AttachmentMedia>
<FileTextIcon />
</AttachmentMedia>
<AttachmentContent>
<AttachmentTitle>sales-dashboard.pdf</AttachmentTitle>
<AttachmentDescription>PDF · 2.4 MB</AttachmentDescription>
</AttachmentContent>
<AttachmentActions>
<AttachmentAction aria-label="Remove sales-dashboard.pdf">
<XIcon />
</AttachmentAction>
</AttachmentActions>
</Attachment>
```
## Composition
Use the following composition to build an attachment:
```text
Attachment
├── AttachmentMedia
├── AttachmentContent
│ ├── AttachmentTitle
│ └── AttachmentDescription
├── AttachmentActions
│ └── AttachmentAction
└── AttachmentTrigger
```
Use `AttachmentGroup` to lay out multiple attachments in a scrollable row:
```text
AttachmentGroup
├── Attachment
└── Attachment
```
## Features
- Icon and image media through `AttachmentMedia`
- Upload states: `idle`, `uploading`, `processing`, `error`, and `done` with built-in styling and a shimmer while in progress
- Three sizes and horizontal or vertical orientation
- A full-card `AttachmentTrigger` that opens a link or dialog while the actions stay independently clickable
- Scrollable, snapping `AttachmentGroup` with an edge fade
- Customizable styling through the `className` prop on every part
## Examples
### Image
Set `variant="image"` on `AttachmentMedia` and render an `<img>` inside it. Use `orientation="vertical"` to stack the media above the content.
<ComponentPreview
styleName="base-rhea"
name="attachment-image"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
### States
Set `state` to reflect the upload lifecycle. `uploading` and `processing` shimmer the title, and `error` switches to a destructive treatment.
<ComponentPreview
styleName="base-rhea"
name="attachment-states"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
### Sizes
Use `size` to switch between `default`, `sm`, and `xs`.
<ComponentPreview
styleName="base-rhea"
name="attachment-sizes"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
### Group
Wrap attachments in `AttachmentGroup` to lay them out in a horizontally scrollable, snapping row with an edge fade.
<ComponentPreview
styleName="base-rhea"
name="attachment-group"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
### Trigger
Add an `AttachmentTrigger` to make the whole card open a link or dialog. It fills the card behind the actions, so the actions stay clickable.
<ComponentPreview
styleName="base-rhea"
name="attachment-trigger"
previewClassName="h-auto theme-blue bg-surface dark:bg-background"
/>
```tsx showLineNumbers
<Dialog>
<Attachment>
{/* media, content, actions */}
<DialogTrigger
render={<AttachmentTrigger aria-label="Preview research-summary.pdf" />}
/>
</Attachment>
<DialogContent>{/* ... */}</DialogContent>
</Dialog>
```
## Accessibility
`AttachmentAction` renders a `Button`, and `AttachmentTrigger` renders a real `<button>` (or your element via `render`). Follow the guidance below so both are operable and announced.
### Label icon-only actions
`AttachmentAction` is usually icon-only, so give each one an `aria-label` describing the action and its target.
```tsx showLineNumbers
<AttachmentAction aria-label="Remove sales-dashboard.pdf">
<XIcon />
</AttachmentAction>
```
### Label the trigger
`AttachmentTrigger` covers the card with no text of its own, so give it an `aria-label` for what activating it does.
```tsx showLineNumbers
<AttachmentTrigger
render={
<a
href={url}
target="_blank"
rel="noreferrer"
aria-label="Open workspace.png"
/>
}
/>
```
The trigger sits behind the actions in the stacking order, so an `AttachmentAction` and the `AttachmentTrigger` never trap each other — both remain separately focusable and clickable.
### Keyboard scrolling
An `AttachmentGroup` scrolls horizontally. When its attachments are interactive: a trigger or actions, keyboard users reach off-screen items by tabbing to them. For a row of presentational attachments, make the group itself focusable and scrollable by adding `tabIndex={0}`, `role="group"`, and an `aria-label`.
### Meaning beyond color
The `error` state uses a destructive color. Keep the failure reason in `AttachmentDescription` so the state is not conveyed by color alone.
## API Reference
### Attachment
The root attachment container.
| Prop | Type | Default | Description |
| ------------- | ------------------------------------------------------------ | -------------- | ------------------------------------------------- |
| `state` | `"idle" \| "uploading" \| "processing" \| "error" \| "done"` | `"done"` | The upload state. Drives styling and the shimmer. |
| `size` | `"default" \| "sm" \| "xs"` | `"default"` | The attachment size. |
| `orientation` | `"horizontal" \| "vertical"` | `"horizontal"` | Lay the media beside or above the content. |
| `className` | `string` | - | Additional classes to apply to the root element. |
### AttachmentMedia
The media slot for an icon or image preview.
| Prop | Type | Default | Description |
| ----------- | ------------------- | -------- | ---------------------------------------------- |
| `variant` | `"icon" \| "image"` | `"icon"` | Whether the media holds an icon or an `<img>`. |
| `className` | `string` | - | Additional classes to apply to the media slot. |
### AttachmentContent
Wraps the title and description.
| Prop | Type | Default | Description |
| ----------- | -------- | ------- | ------------------------------------------------ |
| `className` | `string` | - | Additional classes to apply to the content slot. |
### AttachmentTitle
The attachment name. Shimmers while the attachment is `uploading` or `processing`.
| Prop | Type | Default | Description |
| ----------- | -------- | ------- | ----------------------------------------- |
| `className` | `string` | - | Additional classes to apply to the title. |
### AttachmentDescription
Secondary metadata such as the file type, size, or upload status.
| Prop | Type | Default | Description |
| ----------- | -------- | ------- | ----------------------------------------------- |
| `className` | `string` | - | Additional classes to apply to the description. |
### AttachmentActions
A container for one or more actions, aligned to the end of the attachment.
| Prop | Type | Default | Description |
| ----------- | -------- | ------- | ------------------------------------------- |
| `className` | `string` | - | Additional classes to apply to the actions. |
### AttachmentAction
An action button. Renders a [`Button`](/docs/components/button) and accepts all of its props.
| Prop | Type | Default | Description |
| ---------- | ------------------------------------- | ----------- | ---------------------------------------- |
| `size` | `Button["size"]` | `"icon-xs"` | The button size. |
| `...props` | `React.ComponentProps<typeof Button>` | - | Props spread to the underlying `Button`. |
### AttachmentTrigger
A full-card overlay that activates the attachment. Renders a `<button>` by default.
| Prop | Type | Default | Description |
| ---------- | -------------------------------- | ------- | ---------------------------------------------- |
| `render` | `ReactElement \| function` | - | Render as a different element, such as a link. |
| `...props` | `React.ComponentProps<"button">` | - | Props spread to the trigger element. |
### AttachmentGroup
Lays out attachments in a horizontally scrollable, snapping row.
| Prop | Type | Default | Description |
| ----------- | -------- | ------- | ----------------------------------------- |
| `className` | `string` | - | Additional classes to apply to the group. |