Add a Custom Document for Styled Components

With Next.js Preview Mode, we will actually be editing while on the production site. In order for the Tina UI to render properly in production, we need to add a custom document to load the Tina styled components in Preview Mode.

Create a new file in the pages directory called _document.tsx, copy this code to that file:


import Document from 'next/document'
import { ServerStyleSheet } from 'styled-components'

export default class MyDocument extends Document {
  static async getInitialProps(ctx) {
    const sheet = new ServerStyleSheet()
    const originalRenderPage = ctx.renderPage

    try {
      ctx.renderPage = () =>
          enhanceApp: App => props => sheet.collectStyles(<App {...props} />),

      const initialProps = await Document.getInitialProps(ctx)
      return {
        styles: (
    } finally {