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:
pages/_document.tsx
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 = () =>
originalRenderPage({
enhanceApp: App => props => sheet.collectStyles(<App {...props} />),
})
const initialProps = await Document.getInitialProps(ctx)
return {
...initialProps,
styles: (
<>
{initialProps.styles}
{sheet.getStyleElement()}
</>
),
}
} finally {
sheet.seal()
}
}
}