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

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708 B
JavaScript

import Document, { Head, Main, NextScript } from 'next/document'
import { extractCritical } from 'emotion-server'
export default class MyDocument extends Document {
static getInitialProps ({ renderPage }) {
const page = renderPage()
const styles = extractCritical(page.html)
return { ...page, ...styles }
}
constructor (props) {
super(props)
const { __NEXT_DATA__, ids } = props
if (ids) {
__NEXT_DATA__.ids = ids
}
}
render () {
return (
<html>
<Head>
<style dangerouslySetInnerHTML={{ __html: this.props.css }} />
</Head>
<body>
<Main />
<NextScript />
</body>
</html>
)
}
}