React component library for LlamaIndex applications. Built with TypeScript, Vite, Tailwind CSS v4, Radix UI, and Storybook. Ships as a shadcn/ui-style library with both full-package and individual component consumption.

Installation

pnpm add @llamaindex/ui
# or
npm install @llamaindex/ui
# or
yarn add @llamaindex/ui

Peer dependencies you should already have in your app:

react and react-dom (v18)
llama-cloud-services
@llamaindex/workflows-client

Tailwind v4 styles

Import the library stylesheet:

/* e.g. src/index.css, app/globals.css */
@import "@llamaindex/ui/styles.css";

Usage

Basic import

import { Button, Card } from "@llamaindex/ui";

export function Example() {
  return (
    <Card className="p-6">
      <Button>Click me</Button>
    </Card>
  );
}

Using API clients via context

Many components and hooks use API clients provided by context. Wrap your app with ApiProvider and pass clients. Then components can access clients via hooks instead of explicit client props.

import {
  ApiProvider,
  createCloudAgentClient,
  cloudApiClient,
  workflowsClient,
} from "@llamaindex/ui/lib";
import { ItemGrid } from "@llamaindex/ui/item-grid";

const clients = {
  agentDataClient: createCloudAgentClient({
    agentUrlId: "your-agent-url-id",
    collection: "your-collection",
  }),
  cloudApiClient,
  workflowsClient,
};

export function App() {
  return (
    <ApiProvider clients={clients}>
      <ItemGrid defaultPageSize={20} />
    </ApiProvider>
  );
}

PDF viewer assets

PdfPreview, FilePreview and DocumentPreview render PDFs with react-pdf, which needs a pdf.js worker at runtime. The library resolves it from the pdfjs-dist package installed alongside it, so your bundler emits it as a same-origin asset — nothing is loaded from a public CDN. The worker runs with your page's privileges, so serve it from an origin you control and keep your CSP script-src/worker-src limited to 'self'.

Two optional asset sets are not enabled by default, because they are directories that bundlers cannot resolve automatically:

cmaps/ — required to render PDFs that use CID-keyed fonts (typically CJK documents). Without it those glyphs come out blank.
wasm/ — required to decode JPEG 2000 (JPX) images.

To enable them, copy the directories out of pdfjs-dist into your static assets at build time and point the library at them once during start-up:

import { configurePdfjs } from "@llamaindex/ui/file-preview";

configurePdfjs({
  cMapUrl: "/pdfjs/cmaps/",
  wasmUrl: "/pdfjs/wasm/",
});

// package.json — copy the assets as part of your build
"scripts": {
  "prebuild": "cp -R node_modules/pdfjs-dist/cmaps node_modules/pdfjs-dist/wasm public/pdfjs/"
}

configurePdfjs also accepts workerSrc. Pass it if your bundler does not rewrite new URL("pdfjs-dist/build/pdf.worker.min.mjs", import.meta.url) inside dependencies; with Vite, for example, import workerSrc from "pdfjs-dist/build/pdf.worker.min.mjs?url" gives you a URL to hand over. When the worker cannot be loaded at all, pdf.js falls back to rendering on the main thread: slower, but still same-origin.

Contributing

Please read the contribution guide: CONTRIBUTING.md