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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 from 'react'
import PropTypes from 'prop-types'
import Helmet from 'react-helmet'
import { useStaticQuery, graphql } from 'gatsby'
function SEO ({ 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
}
].concat(meta)}
/>
)
}
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