Data display
AttachmentPreview
Previews browser-owned images with localized loading, error and unsupported-file fallbacks.
01
See it and copy it
Framework example
Choose Astro, React, or Elements to compare native usage against the shared visual output. Each example assumes the framework-level setup is already complete.
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View AttachmentPreview code
Framework usage
Switch targets to compare the adapter code. This live preview runs the Astro example. React and Elements use their own behavior APIs; complete the matching framework setup before copying an example.---
import { AttachmentPreview, Button, Link } from '@santi020k/lumen-astro'
---
<AttachmentPreview src="/logo.svg" contentType="image/svg+xml" alt="Lumen logo">
<span slot="caption">Example image attachment</span>
<Link slot="actions" href="/logo.svg" download>Download</Link>
<Button slot="actions" type="button">Replace</Button>
</AttachmentPreview>
<AttachmentPreview contentType="application/pdf" alt="Example report" labels={{ unavailable: 'Vista previa no disponible para este archivo.' }}>
<span slot="caption">Example PDF · unsupported preview</span>
</AttachmentPreview>import { AttachmentPreview, Button } from '@santi020k/lumen-react'
<AttachmentPreview src="/logo.svg" contentType="image/svg+xml" alt="Lumen logo"
caption="Example attachment" actions={<Button type="button">Replace</Button>} /><script type="module">
import { defineLumenElements } from '@santi020k/lumen-elements/define'
defineLumenElements()
</script>
<lumen-attachment-preview aria-label="Logo attachment" content-type="image/svg+xml" error-label="Could not load the preview.">
<div data-slot="attachment-preview-media"><img data-ui-attachment-preview-image src="/logo.svg" alt="Lumen logo"></div>
<p data-slot="attachment-preview-fallback" data-ui-attachment-preview-message role="status"></p>
<p>Example image attachment</p>
<div data-slot="attachment-preview-actions"><a href="/logo.svg" download>Download</a></div>
</lumen-attachment-preview>02
Choose your target
Add this component
Choose the package for your runtime. All adapters share the Lumen stylesheet. Use the matching registry command when you want a local wrapper for that framework.
pnpm add @santi020k/lumen-astropnpm add @santi020k/lumen-astrolumen add AttachmentPreviewlumen add AttachmentPreviewpnpm add @santi020k/lumen-reactpnpm add @santi020k/lumen-reactlumen add AttachmentPreview --target reactlumen add AttachmentPreview --target reactpnpm add @santi020k/lumen-elementspnpm add @santi020k/lumen-elementslumen add AttachmentPreview --target elementslumen add AttachmentPreview --target elementsAPI reference
Lumen-specific props and runtime attributes for the Astro primitive. Use the framework differences above and the copyable examples for React composition and Elements attributes; the public adapter types define their supported contracts.
| Attribute | Values | Default | Description |
|---|---|---|---|
| src | string | - | Browser-owned image URL; the application owns authorization and object URL cleanup. |
| alt | string | required | Accessible description of the image. |
| contentType / content-type | string | - | Non-image MIME types use a fallback instead of rendering an image. |
| state | "ready" | "loading" | "error" | "unavailable" | derived | Explicit loading, error and unavailable states override automatic image status. |
| labels | Partial<LumenAttachmentPreviewLabels> | English labels | Localizes fallback messages. Elements uses error-label, loading-label and unavailable-label. |
| retryKey / retry-key | string | number | - | Changes the retry identity for the current image. Retry remains application controlled. |
| caption / actions | React nodes / Astro named slots | - | Composes a caption and independent download, replace or remove actions. |
| onStateChange | (state) => void | - | React callback for transitions after the initial render; DOM adapters emit ui:attachment-preview-change with { state }. |
| class, className | string | "" | Merges custom classes with the generated ui-* root classes. |
| ...native attributes | HTML attributes | - | Forwards standard attributes to the root element unless the component consumes them. |
Runtime events
CustomEvents dispatched by the Astro UIPrimitives runtime for this component.
| Event | Target | Detail | When |
|---|---|---|---|
| ui:attachment-preview-change | AttachmentPreview root | { state: "error" | "loading" | "ready" | "unavailable" } | Fires after a preview state changes. The event never includes the file URL. |