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material-ui/examples/nextjs/pages/_document.js /
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| import React from 'react'; | |
| import PropTypes from 'prop-types'; | |
| import Document, { Head, Main, NextScript } from 'next/document'; | |
| import flush from 'styled-jsx/server'; | |
| class MyDocument extends Document { | |
| render() { | |
| const { pageContext } = this.props; | |
| return ( | |
| <html lang="en" dir="ltr"> | |
| <Head> | |
| <meta charSet="utf-8" /> | |
| {/* Use minimum-scale=1 to enable GPU rasterization */} | |
| <meta | |
| name="viewport" | |
| content="minimum-scale=1, initial-scale=1, width=device-width, shrink-to-fit=no" | |
| /> | |
| {/* PWA primary color */} | |
| <meta | |
| name="theme-color" | |
| content={pageContext ? pageContext.theme.palette.primary.main : null} | |
| /> | |
| <link | |
| rel="stylesheet" | |
| href="https://fonts.googleapis.com/css?family=Roboto:300,400,500" | |
| /> | |
| </Head> | |
| <body> | |
| <Main /> | |
| <NextScript /> | |
| </body> | |
| </html> | |
| ); | |
| } | |
| } | |
| MyDocument.getInitialProps = ctx => { | |
| // Resolution order | |
| // | |
| // On the server: | |
| // 1. app.getInitialProps | |
| // 2. page.getInitialProps | |
| // 3. document.getInitialProps | |
| // 4. app.render | |
| // 5. page.render | |
| // 6. document.render | |
| // | |
| // On the server with error: | |
| // 1. document.getInitialProps | |
| // 2. app.render | |
| // 3. page.render | |
| // 4. document.render | |
| // | |
| // On the client | |
| // 1. app.getInitialProps | |
| // 2. page.getInitialProps | |
| // 3. app.render | |
| // 4. page.render | |
| // Render app and page and get the context of the page with collected side effects. | |
| let pageContext; | |
| const page = ctx.renderPage(Component => { | |
| const WrappedComponent = props => { | |
| pageContext = props.pageContext; | |
| return <Component {...props} />; | |
| }; | |
| WrappedComponent.propTypes = { | |
| pageContext: PropTypes.object.isRequired, | |
| }; | |
| return WrappedComponent; | |
| }); | |
| let css; | |
| // It might be undefined, e.g. after an error. | |
| if (pageContext) { | |
| css = pageContext.sheetsRegistry.toString(); | |
| } | |
| return { | |
| ...page, | |
| pageContext, | |
| // Styles fragment is rendered after the app and page rendering finish. | |
| styles: ( | |
| <React.Fragment> | |
| <style | |
| id="jss-server-side" | |
| // eslint-disable-next-line react/no-danger | |
| dangerouslySetInnerHTML={{ __html: css }} | |
| /> | |
| {flush() || null} | |
| </React.Fragment> | |
| ), | |
| }; | |
| }; | |
| export default MyDocument; |