doc.silverstripe.org/src/components/SEO.tsx

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/**
* SEO component that queries for data with
* Gatsby's useStaticQuery React hook
*
* See: https://www.gatsbyjs.org/docs/use-static-query/
*/
import React, { StatelessComponent } from "react";
import Helmet from "react-helmet";
import { useStaticQuery, graphql } from "gatsby";
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import { getCurrentVersion } from '../utils/nodes';
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interface MetaProp {
name: string,
content: any,
}
interface SEOProps {
description?: string,
lang?: string,
meta?: MetaProp[],
title: string
}
const SEO: StatelessComponent<SEOProps> = ({ description, lang, meta, title }) => {
const { site } = useStaticQuery(graphql`
query {
site {
siteMetadata {
title
description
author
}
}
}
`);
const metaDescription = description || site.siteMetadata.description;
return (
<Helmet
htmlAttributes={{
lang
}}
title={title}
titleTemplate={`%s | ${site.siteMetadata.title}`}
meta={[
{
name: `description`,
content: metaDescription
},
{
property: `og:title`,
content: title
},
{
property: `og:description`,
content: metaDescription
},
{
property: `og:type`,
content: `website`
},
{
name: `twitter:card`,
content: `summary`
},
{
name: `twitter:creator`,
content: site.siteMetadata.author
},
{
name: `twitter:title`,
content: title
},
{
name: `twitter:description`,
content: metaDescription
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},
{
name: `docsearch:version`,
content: getCurrentVersion(),
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},
{
name: `docsearch:context`,
content: process.env.DOCS_CONTEXT,
},
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].concat(meta)}
/>
);
};
SEO.defaultProps = {
lang: `en`,
meta: [],
description: ``
};
export default SEO;