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Beautiful UI

NavigationLumen Halo

Tree ViewProv1.0.0

Nested folders and files the WAI-ARIA tree way: one tab stop, arrows that move and open, typing to jump to a name, single or multiple selection, hairline guides down each open folder.

Built on shadcn/ui

.md
pnpm dlx shadcn@latest add @beautiful-ui-pro/lumen-tree-view

Needs your registry key. Your components.json style picks the Base UI or Radix build: radix-*, new-york and default get Radix, base-* gets Base UI.

Styles didn't apply?

The CLI adds the styles to the CSS file named in components.json (tailwind.css). Check that it points at your global stylesheet, that the project uses Tailwind CSS v4, and that the file is imported in your root layout. Installed by hand: paste styles.css into that file.

Set up the Beautiful UI registry

Free pieces install from their URL with no setup (that URL gives the Base UI build; Radix projects use /r/radix-nova/<name>.json, or add the registries below and the CLI picks your build). Pro pieces need the registries below and BEAUTIFUL_UI_TOKEN in .env.local.

components.json
{
  "registries": {
    "@beautiful-ui": "https://beautiful-ui.dev/r/{style}/{name}.json",
    "@beautiful-ui-pro": {
      "url": "https://beautiful-ui.dev/r/pro/{style}/{name}.json",
      "headers": { "Authorization": "Bearer ${BEAUTIFUL_UI_TOKEN}" }
    }
  }
}

MCP server

claude mcp add --transport http beautiful-ui https://beautiful-ui.dev/api/mcp
Catalog for agents: /llms.txt

Usage

Import it and pass your content. The props that matter most are listed next.

Example
"use client";

import { TreeView, type TreeNode } from "@/components/ui/lumen/controls/tree-view";

const files: TreeNode[] = [
  {
    id: "src",
    label: "src",
    children: [
      { id: "src/app", label: "app", children: [{ id: "src/app/page.tsx", label: "page.tsx", meta: "2 KB" }] },
      { id: "src/lib/utils.ts", label: "utils.ts", meta: "1 KB" },
    ],
  },
  { id: "package.json", label: "package.json", meta: "3 KB" },
];

export function FileTree({ onOpen }: { onOpen: (path: string) => void }) {
  return <TreeView aria-label="Files" items={files} defaultExpanded={["src"]} onActivate={(node) => onOpen(node.id)} />;
}

Props

  • items–

    { id, label, icon?, meta?, children?, disabled? }[]

    The tree. A node with children is a folder.

  • aria-label–

    string

    Names the tree, e.g. "Files".

  • expanded / defaultExpanded / onExpandedChange–

    string[] / string[] / (ids: string[]) => void

    Open folder ids.

  • selected / defaultSelected / onSelectedChange–

    string[] / string[] / (ids: string[]) => void

    Selected ids.

  • selectionMode"single"

    "single" | "multiple" | "none"

    none makes a navigable outline.

  • onActivate–

    (node) => void

    Enter, or a double click on a file.

Source

components/ui/lumen/controls/tree-view.tsx

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