rsnext/errors/no-styled-jsx-in-document.mdx

---
title: 'No `styled-jsx` in `_document`'
---

> Prevent usage of `styled-jsx` in `pages/_document.js`.

## Why This Error Occurred

Custom CSS like `styled-jsx` is not allowed in a [Custom Document](/docs/pages/building-your-application/routing/custom-document).

## Possible Ways to Fix It

If you need shared CSS for all of your pages, take a look at the [Custom `App`](/docs/pages/building-your-application/routing/custom-app) file or define a custom layout.

For example, consider the following stylesheet named `styles.css`:

```css filename="styles.css"
body {
  font-family: 'SF Pro Text', 'SF Pro Icons', 'Helvetica Neue', 'Helvetica',
    'Arial', sans-serif;
  padding: 20px 20px 60px;
  max-width: 680px;
  margin: 0 auto;
}
```

Create a `pages/_app.{js,tsx}` file if not already present. Then, import the `styles.css` file.

```jsx filename="pages/_app.js"
import '../styles.css'

// This default export is required in a new `pages/_app.js` file.
export default function MyApp({ Component, pageProps }) {
  return <Component {...pageProps} />
}
```

These styles (`styles.css`) will apply to all pages and components in your application.

## Useful Links

- [Custom Document Caveats](/docs/pages/building-your-application/routing/custom-document#caveats)
- [Layouts](/docs/pages/building-your-application/routing/pages-and-layouts#layout-pattern)
- [Built in CSS Support](/docs/pages/building-your-application/styling)
- [Custom `App`](/docs/pages/building-your-application/routing/custom-app)