import Document, {Head, Main, NextScript} from 'next/document' // The document (which is SSR-only) needs to be customized to expose the locale // data for the user's locale for React Intl to work in the browser. export default class IntlDocument extends Document { static async getInitialProps (context) { const props = await super.getInitialProps(context) const {req: {locale, localeDataScript}} = context return { ...props, locale, localeDataScript } } render () { // Polyfill Intl API for older browsers const polyfill = `https://cdn.polyfill.io/v2/polyfill.min.js?features=Intl.~locale.${this.props.locale}` return (