Chat
Attachment
A file attached to a chat message, or waiting to be sent with one: its icon, name and size. With href it is a link that opens or downloads the file; with onRemove it has a remove button, named after the file, for the composer. Long names truncate.
Install
Once per app, with Tailwind CSS v4 and an @/* path alias (Ouro HX is built on Base UI, so --base base; skip -t in an existing app):
npx shadcn@latest init --base base --preset nova --yes --no-monoreponpx shadcn@latest add ourostack/ouro-ui/ouro-base#v1.2.13Then the component. From v0.8.0 it installs only the helpers it imports and never touches your stylesheet (Installing):
npx shadcn@latest add ourostack/ouro-ui/attachment#v1.2.13Or, with the @ouro namespace set up:
npx shadcn@latest add @ouro/ouro-base @ouro/attachmentIts tests, stories and Playwright spec are optional. They need Vitest 4.1.11 or later, and from v0.8.0 never change a version your app has (Testing):
npx shadcn@latest add ourostack/ouro-ui/attachment#v1.2.13 ourostack/ouro-ui/attachment-tests#v1.2.13import { Attachment } from "@/components/ouro/message/attachment";Paths use shadcn's default @/ alias; the CLI rewrites them to yours.
Example
<Attachment name="menu.pdf" size={file.size} contentType={file.type} href={file.url} />
<Attachment name={file.name} size={file.size} onRemove={() => remove(file)} />Use instead when
- Use
Linkinstead for a link that is not a file, andAvatarfor a person's picture.
Props
Type: AttachmentProps.
className- Type:
string - Layout only: margins, width (
mt-2). Appearance classes warn in development. contentType- Type:
string - The file's MIME type (
file.type):image/*shows an image icon, anything else a file icon. download- Type:
boolean - Downloads the file instead of opening it (the link's
downloadattribute). Needshref. formatSize- Type:
((bytes: number) => string) - Default:
"512 B", "2 kB", "1.2 MB", in steps of 1024 - Writes
sizefor other languages or units. href- Type:
string - Where the file opens or downloads. With it, the attachment is a link named by the file and its size.
name(required)- Type:
string - The file's name, as the user sees it: "menu.pdf". Required, so every file has a name.
onRemove- Type:
(() => void) - Shows a remove button, which calls this. Use it while composing a message, before it is sent.
ref- Type:
Ref<HTMLDivElement> - Reaches the rendered element.
removeLabel- Type:
((name: string) => string) - Default: (name) =>
Remove ${name} - The remove button's accessible name, for other languages.
size- Type:
number - The file's size in bytes (
file.size), shown as "1.2 MB".
Native attributes
Also accepts the attributes in React's HTMLAttributes (id, aria-*, event handlers), passed to the rendered element, except those named on this page.
Don't use
These are not props. Passing one fails the type check with the fix in the error, and in development a console message names the fix.
filename: Not a prop. The file's name isname:<Attachment name="menu.pdf" />.fileName: Not a prop. The file's name isname:<Attachment name="menu.pdf" />.onDelete: Not a prop. UseonRemove:<Attachment name="menu.pdf" onRemove={remove} />.onDismiss: Not a prop. UseonRemove:<Attachment name="menu.pdf" onRemove={remove} />.url: Not a prop. The file's address ishref:<Attachment name="menu.pdf" href="/menu.pdf" />.
className is for layout only
Pass margins, width and grid placement (mt-4, w-full, col-span-2). Your classes always win over Ouro UI's: Attachment merges className last with cn (tailwind-merge), so a class that conflicts with its own replaces it.layout-classes
Appearance comes from props, not classes. In development, a class that sets appearance logs one warning per component instance, naming the prop to use instead. A class sets appearance when, after its variants (hover:, sm:) and any ! are removed, it starts with bg-, text-, border-, rounded-, shadow-, font-, ring-, from-, via-, to-, fill- or stroke-, or is border, rounded, shadow or ring, or has a dark: variant. Text wrapping, overflow and table layout classes (text-wrap, text-ellipsis, border-collapse) are layout and do not warn.
Alignment classes (text-center) warn too: set alignment on a parent element.
Claim sources
- layout-classes: test:registry/ouro/components/ouro/message/attachment.test.tsx::Attachment > forwards a ref and lets app layout classes win
verify:testExists(registry/ouro/components/ouro/message/attachment.test.tsx::Attachment > forwards a ref and lets app layout classes win)