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seo.js
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93 lines (86 loc) · 1.88 KB
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import React from 'react'
import PropTypes from 'prop-types'
import Helmet from 'react-helmet'
import { useStaticQuery, graphql } from 'gatsby'
const SEO = ({ description, lang, meta, title }) => {
const { site } = useStaticQuery(
graphql`
query {
site {
siteMetadata {
title
description
author
}
}
}
`
)
const titleFormatted = title
? `${title} — ${site.siteMetadata.title}`
: site.siteMetadata.title
const metaDescription = description || site.siteMetadata.description
return (
<Helmet
htmlAttributes={{
lang
}}
meta={[
{
name: `description`,
content: metaDescription
},
{
property: `og:title`,
content: titleFormatted
},
{
property: `og:description`,
content: metaDescription
},
{
property: `og:type`,
content: `website`
},
{
property: 'og:image',
content: site.siteMetadata.image
},
{
name: `twitter:card`,
content: `summary_large_image`
},
{
name: `twitter:creator`,
content: site.siteMetadata.author
},
{
name: `twitter:title`,
content: titleFormatted
},
{
name: `twitter:description`,
content: metaDescription
},
{
name: 'twitter:image',
content: site.siteMetadata.image
}
].concat(meta)}
>
<title>{titleFormatted}</title>
</Helmet>
)
}
SEO.defaultProps = {
lang: `en`,
meta: [],
description: ``
}
SEO.propTypes = {
description: PropTypes.string,
lang: PropTypes.string,
meta: PropTypes.arrayOf(PropTypes.object),
title: PropTypes.string.isRequired
}
export default SEO