/_document.js Secret

## _document.js
import Document, { Head, Main, NextScript } from 'next/document';
import flush from 'styled-jsx/server'

export default class MyDocument extends Document {
  static getInitialProps ({ renderPage }) {
    const {html, head} = renderPage();
    const styles = flush();

    return { html, head, styles };
  }

  render () {
    return (
     <html>
       <Head>
         <style>{`body { margin: 0 } /* custom! */`}</style>
         <title>Next.js 연습</title>
       </Head>
       <body>
         <Main />
         <NextScript />
       </body>
     </html>
    );
  }
}
	import Document, { Head, Main, NextScript } from 'next/document';
	import flush from 'styled-jsx/server'

	export default class MyDocument extends Document {
	static getInitialProps ({ renderPage }) {
	const {html, head} = renderPage();
	const styles = flush();

	return { html, head, styles };
	}

	render () {
	return (
	<html>
	<Head>
	<style>{`body { margin: 0 } /* custom! */`}</style>
	<title>Next.js 연습</title>
	</Head>
	<body>
	<Main />
	<NextScript />
	</body>
	</html>
	);
	}
	}