shadcn-ui/apps/v4/content/docs/(root)/styleguide.mdx

---
title: Styleguide
description: A styleguide for writing documentation in mdx.
---

The OpenAI API provides a simple interface to state-of-the-art AI models for text generation, natural language processing, computer vision, and more. This example generates text output from a prompt, as you might using ChatGPT.

## Analyze image inputs

You can provide image inputs to the model as well. Scan receipts, analyze screenshots, or find objects in the real world with [computer vision](/docs/installation/computer-vision). This is code in a `pre` tag and `npx` command in a `code` tag.

```bash
npm install foo
```

```bash
npx shadcn@latest init
```

```bash
npx shadcn@latest add button
```

```tsx
<Button>Click me</Button>
```

```tsx showLineNumbers
// With line numbers
export default function Home() {
  return <div>Hello</div>
}
```

```tsx title="Button.tsx"
export default function Button({ children }: { children: React.ReactNode }) {
  return <button>{children}</button>
}
```

This is a code block with a title.

## Line Numbers and Line Highlighting

Draw attention to a particular line of code.

```tsx {4} showLineNumbers
import { useFloating } from "@floating-ui/react"

function MyComponent() {
  const { refs, floatingStyles } = useFloating()

  return (
    <>
      <div ref={refs.setReference} />
      <div ref={refs.setFloating} style={floatingStyles} />
    </>
  )
}
```

## Word Highlighting

Draw attention to a particular word or series of characters.

```tsx /floatingStyles/
import { useFloating } from "@floating-ui/react"

function MyComponent() {
  const { refs, floatingStyles } = useFloating()

  return (
    <>
      <div ref={refs.setReference} />
      <div ref={refs.setFloating} style={floatingStyles} />
    </>
  )
}
```

How

```tsx title="apps/www/registry/registry-blocks.tsx"
export const blocks = [
  // ...
  {
    name: "dashboard-01",
    author: "shadcn (https://ui.shadcn.com)",
    title: "Dashboard",
    description: "A simple dashboard with a hello world component.",
    type: "registry:block",
    registryDependencies: ["input", "button", "card"],
    dependencies: ["zod"],
    files: [
      {
        path: "blocks/dashboard-01/page.tsx",
        type: "registry:page",
        target: "app/dashboard/page.tsx",
      },
      {
        path: "blocks/dashboard-01/components/hello-world.tsx",
        type: "registry:component",
      },
      {
        path: "blocks/dashboard-01/components/example-card.tsx",
        type: "registry:component",
      },
      {
        path: "blocks/dashboard-01/hooks/use-hello-world.ts",
        type: "registry:hook",
      },
      {
        path: "blocks/dashboard-01/lib/format-date.ts",
        type: "registry:lib",
      },
    ],
    categories: ["dashboard"],
  },
]
```

```txt
apps
└── web         # Your app goes here.
    ├── app
    │   └── page.tsx
    ├── components
    │   └── login-form.tsx
    ├── components.json
    └── package.json
packages
└── ui          # Your components and dependencies are installed here.
    ├── src
    │   ├── components
    │   │   └── button.tsx
    │   ├── hooks
    │   ├── lib
    │   │   └── utils.ts
    │   └── styles
    │       └── globals.css
    ├── components.json
    └── package.json
package.json
turbo.json
```

```diff showLineNumbers
- @plugin 'tailwindcss-animate';
+ @import "tw-animate-css";
```

## CSS Variables

```tsx /bg-background/ /text-foreground/
<div className="bg-background text-foreground" />
```

To use CSS variables for theming set `tailwind.cssVariables` to `true` in your `components.json` file.

```json {8} title="components.json"
{
  "style": "default",
  "rsc": true,
  "tailwind": {
    "config": "",
    "css": "app/globals.css",
    "baseColor": "neutral",
    "cssVariables": true
  },
  "aliases": {
    "components": "@/components",
    "utils": "@/lib/utils",
    "ui": "@/registry/new-york-v4/ui",
    "lib": "@/lib",
    "hooks": "@/hooks"
  },
  "iconLibrary": "lucide"
}
```

## Utility classes

```tsx /bg-zinc-950/ /text-zinc-50/ /dark:bg-white/ /dark:text-zinc-950/
<div className="bg-zinc-950 dark:bg-white" />
```

To use utility classes for theming set `tailwind.cssVariables` to `false` in your `components.json` file.

```json {8} title="components.json"
{
  "style": "default",
  "rsc": true,
  "tailwind": {
    "config": "",
    "css": "app/globals.css",
    "baseColor": "slate",
    "cssVariables": false
  },
  "aliases": {
    "components": "@/components",
    "utils": "@/lib/utils",
    "ui": "@/registry/new-york-v4/ui",
    "lib": "@/lib",
    "hooks": "@/hooks"
  },
  "iconLibrary": "lucide"
}
```