import React from "react" ; import Document , { Head , Html , Main , NextScript } from "next/document" ; import { ServerStyleSheet } from "styled-components" ; export default class MyDocument extends Document < any > { 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 ( ) ; } } render ( ) { return ( < Html > < Head > { this . props . styleTags } < /Head> < body > < Main /> < NextScript / > < /body> < /Html>); } }