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Seo.tsx
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*/
import * as React from 'react';
import Head from 'next/head';
import {withRouter, Router} from 'next/router';
import {siteConfig} from '../siteConfig';
export interface SeoProps {
title: string;
description?: string;
image?: string;
// jsonld?: JsonLDType | Array<JsonLDType>;
children?: React.ReactNode;
isHomePage: boolean;
searchOrder?: number;
}
const deployedTranslations = [
'en',
'zh-hans',
'es',
// We'll add more languages when they have enough content.
// Please DO NOT edit this list without a discussion in the reactjs/react.dev repo.
// It must be the same between all translations.
];
let shouldPreventIndexing = false;
if (
siteConfig.languageCode !== 'en' &&
!deployedTranslations.includes(siteConfig.languageCode)
) {
shouldPreventIndexing = true;
}
function getDomain(languageCode: string): string {
const subdomain = languageCode === 'en' ? '' : languageCode + '.';
return subdomain + 'react.dev';
}
export const Seo = withRouter(
({
title,
description = 'The library for web and native user interfaces',
image = '/images/og-default.png',
router,
children,
isHomePage,
searchOrder,
}: SeoProps & {router: Router}) => {
const siteDomain = getDomain(siteConfig.languageCode);
const canonicalUrl = `https://${siteDomain}${
router.asPath.split(/[\?\#]/)[0]
}`;
const pageTitle = isHomePage ? title : title + ' – React';
// Twitter's meta parser is not very good.
const twitterTitle = pageTitle.replace(/[<>]/g, '');
return (
<Head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
{title != null && <title key="title">{pageTitle}</title>}
{description != null && (
<meta name="description" key="description" content={description} />
)}
<link rel="canonical" href={canonicalUrl} />
<link
rel="alternate"
href={canonicalUrl.replace(siteDomain, getDomain('en'))}
hrefLang="x-default"
/>
{shouldPreventIndexing && <meta name="robots" content="noindex" />}
{deployedTranslations.map((languageCode) => (
<link
key={'alt-' + languageCode}
rel="alternate"
hrefLang={languageCode}
href={canonicalUrl.replace(siteDomain, getDomain(languageCode))}
/>
))}
<meta property="fb:app_id" content="623268441017527" />
<meta property="og:type" key="og:type" content="website" />
<meta property="og:url" key="og:url" content={canonicalUrl} />
{title != null && (
<meta property="og:title" content={pageTitle} key="og:title" />
)}
{description != null && (
<meta
property="og:description"
key="og:description"
content={description}
/>
)}
<meta
property="og:image"
key="og:image"
content={`https://${siteDomain}${image}`}
/>
<meta
name="twitter:card"
key="twitter:card"
content="summary_large_image"
/>
<meta name="twitter:site" key="twitter:site" content="@reactjs" />
<meta name="twitter:creator" key="twitter:creator" content="@reactjs" />
{title != null && (
<meta
name="twitter:title"
key="twitter:title"
content={twitterTitle}
/>
)}
{description != null && (
<meta
name="twitter:description"
key="twitter:description"
content={description}
/>
)}
<meta
name="twitter:image"
key="twitter:image"
content={`https://${siteDomain}${image}`}
/>
<meta
name="google-site-verification"
content="sIlAGs48RulR4DdP95YSWNKZIEtCqQmRjzn-Zq-CcD0"
/>
{searchOrder != null && (
<meta name="algolia-search-order" content={'' + searchOrder} />
)}
<link
rel="preload"
href="/fonts/Source-Code-Pro-Regular.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Display_W_Md.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Display_W_SBd.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Display_W_Bd.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Text_W_Md.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Text_W_Bd.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Text_W_Rg.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
<link
rel="preload"
href="https://react.dev/fonts/Optimistic_Text_W_It.woff2"
as="font"
type="font/woff2"
crossOrigin="anonymous"
/>
{children}
</Head>
);
}
);