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next.js/examples/with-fela/pages/_document.js

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import Document, { Head, Main, NextScript } from 'next/document'
import { renderToSheetList } from 'fela-dom'
import FelaProvider from '../FelaProvider'
import getFelaRenderer from '../getFelaRenderer'
export default class MyDocument extends Document {
static getInitialProps ({ renderPage }) {
const serverRenderer = getFelaRenderer()
const page = renderPage(App => props => (
<FelaProvider renderer={serverRenderer}>
<App {...props} />
</FelaProvider>
))
const sheetList = renderToSheetList(serverRenderer)
return {
...page,
sheetList
}
}
render () {
const styleNodes = this.props.sheetList.map(
({ type, rehydration, support, media, css }) => (
<style
dangerouslySetInnerHTML={{ __html: css }}
data-fela-rehydration={rehydration}
data-fela-support={support}
data-fela-type={type}
key={`${type}-${media}`}
media={media}
/>
)
)
return (
<html>
<Head>
<title>My page</title>
{styleNodes}
</Head>
<body>
<Main />
<NextScript />
</body>
</html>
)
}
}