Generative Preview

HTML a model is writing, rendered live in a locked-down frame, with the code beside it.

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Category
AI Chat
Access
Pro
Source
356 lines · one file
States
5 drawn
Added
3 Nov 2026

The decision inside it

Generated code runs with no network and no access to your page

Model output is untrusted. The frame is sandboxed with scripts only, and a content policy blocks every request out, so generated code can't read your cookies, call your API or load anything from elsewhere.

When to use it

Use Generative Preview when a model writes HTML or UI and people should see it render while it streams. For code to read rather than run use Code Block.

Installation

How you get it

Paste this into Claude Code, Cursor, Codex or any coding agent. It installs the file and uses it as it is, instead of writing a new one.

Use Liro's Generative Preview for this.
Install it: npx shadcn@latest add @liro/generative-preview
(the @liro registry is set up in components.json, with LIRO_KEY in .env.local)
Import it from @/components/ui/generative-preview.
Do not rewrite or restyle it. Pass my data through its props
and keep its built-in states.

For the full brief with every prop and the mistakes assistants usually make, use Copy prompt above. Pro components install through the @liro registry with your CLI token: see the Namespaced tab.

Usage

components/artifact-preview.tsx
import { GenerativePreview } from "@/components/ui/generative-preview";

export function ArtifactPreview({ html, streaming }: { html: string; streaming: boolean }) {
  return <GenerativePreview title="Pricing page" html={html} streaming={streaming} />;
}

API reference

“Copy prompt” above puts a full brief on your clipboard, install command, dependencies, props, and the mistakes an assistant usually makes with this component.

Props

Read from the component’s own TypeScript interface when the site is built, so this table cannot drift from the file you install.

TypeNotes
htmlstring YesThe HTML the model has written so far. Inline styles and scripts only.
streamingboolean NoTrue while the model is still writing.
titlestring No–
baseCssstring NoExtra CSS put in every render, such as your theme.
defaultTab"preview" | "code" No–
lookLook No–

Dependencies

npm packages

clsxframer-motionlucide-reacttailwind-merge

Liro foundations, installed alongside it

liro-theme

States

All of them are drawn by the component. None is left for you to design.

  • Streaming
  • Finished
  • Sandboxed
  • Code view
  • Empty

Accessibility

  • Keyboard reachable throughout, in visual order
  • Focus trapped in overlays, Escape closes them
  • Focus returns to whatever opened it
  • Live regions announce what changed, not that something did
  • Honours prefers-reduced-motion

Responsive behavior

  • Sizes to its container, not the viewport
  • Usable from 320px up
  • Pointer-based interaction, so trackpad and touch both work
  • No hover-only affordances