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import React from 'react';
import Document, { Head, Main, NextScript } from 'next/document';
import getPageContext from 'docs/src/modules/styles/getPageContext';
import config from 'docs/src/config';
// You can find a benchmark of the available CSS minifiers under
// https://github.com/GoalSmashers/css-minification-benchmark
// We have found that clean-css is faster than cssnano but the output is larger.
// Waiting for https://github.com/cssinjs/jss/issues/279
// 4% slower but 12% smaller output than doing it in a single step.
//
// It's using .browserslistrc
let prefixer;
let cleanCSS;
if (process.env.NODE_ENV === 'production') {
const postcss = require('postcss');
const autoprefixer = require('autoprefixer');
const CleanCSS = require('clean-css');
prefixer = postcss([autoprefixer]);
cleanCSS = new CleanCSS();
}
class MyDocument extends Document {
render() {
const { canonical, pageContext } = this.props;
return (
<html lang="en" dir="ltr">
<Head>
{/* 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"
/>
{/*
manifest.json provides metadata used when your web app is added to the
homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
*/}
<link rel="manifest" href="/static/manifest.json" />
{/* PWA primary color */}
<meta name="theme-color" content={pageContext.theme.palette.primary.main} />
<link rel="shortcut icon" href="/static/favicon.ico" />
<link rel="canonical" href={canonical} />
<link
rel="stylesheet"
href="https://fonts.googleapis.com/css?family=Roboto:300,400,500"
/>
{/*
Preconnect allows the browser to setup early connections before an HTTP request
is actually sent to the server.
This includes DNS lookups, TLS negotiations, TCP handshakes.
*/}
<link href="https://fonts.gstatic.com" rel="preconnect" crossOrigin="anonymous" />
<style id="insertion-point-jss" />
</Head>
<body>
<Main />
<NextScript />
{/* Global Site Tag (gtag.js) - Google Analytics */}
<script defer src="https://www.google-analytics.com/analytics.js" />
<script
// eslint-disable-next-line react/no-danger
dangerouslySetInnerHTML={{
__html: `
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', '${config.google.id}', 'material-ui.com');
`,
}}
/>
<script defer src="https://cdn.jsdelivr.net/docsearch.js/2/docsearch.min.js" />
</body>
</html>
);
}
}
MyDocument.getInitialProps = async ctx => {
// Resolution order
//
// On the server:
// 1. page.getInitialProps
// 2. document.getInitialProps
// 3. page.render
// 4. document.render
//
// On the server with error:
// 2. document.getInitialProps
// 3. page.render
// 4. document.render
//
// On the client
// 1. page.getInitialProps
// 3. page.render
// Get the context of the page to collected side effects.
const pageContext = getPageContext();
const page = ctx.renderPage(Component => props => (
<Component pageContext={pageContext} {...props} />
));
let css = pageContext.sheetsRegistry.toString();
if (process.env.NODE_ENV === 'production') {
const result1 = await prefixer.process(css, { from: undefined });
css = result1.css;
css = cleanCSS.minify(css).styles;
}
return {
...page,
pageContext,
canonical: `https://material-ui.com${ctx.req.url.replace(/\/$/, '')}/`,
styles: (
<style
id="jss-server-side"
// eslint-disable-next-line react/no-danger
dangerouslySetInnerHTML={{ __html: css }}
/>
),
};
};
export default MyDocument;