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Custom Next.js Document for basic html "lang" property setting according to the page path
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| import Document, { Head, Main, NextScript } from 'next/document'; | |
| import React from 'react'; | |
| const LANGUAGES = ['fr', 'en']; | |
| class MyDocument extends Document { | |
| render() { | |
| const pathPrefix = this.props.__NEXT_DATA__.page.split('/')[1]; | |
| const lang = | |
| LANGUAGES.indexOf(pathPrefix) !== -1 ? pathPrefix : LANGUAGES[0]; | |
| return ( | |
| <html lang={lang}> | |
| <Head /> | |
| <body> | |
| <Main /> | |
| <NextScript /> | |
| </body> | |
| </html> | |
| ); | |
| } | |
| } | |
| export default MyDocument; |
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| import React, { useEffect } from 'react'; | |
| import { withRouter } from 'next/router'; | |
| const LANGUAGES = ['fr', 'en']; | |
| export const Layout = withRouter( | |
| ({ router, children }) => { | |
| useEffect(() => { | |
| const pathPrefix = router.pathname.split('/')[1]; | |
| const lang = | |
| LANGUAGES.indexOf(pathPrefix) !== -1 ? pathPrefix : LANGUAGES[0]; | |
| document.documentElement.setAttribute('lang', lang); | |
| }, []); | |
| return ( | |
| <> | |
| {children} | |
| </> | |
| ); | |
| } | |
| ); |
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