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SEO.js
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112 lines (107 loc) · 2.67 KB
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import React from 'react'
import Helmet from 'react-helmet'
import PropTypes from 'prop-types'
import { StaticQuery, graphql } from 'gatsby'
const query = graphql`
query GetSiteMetadata {
site {
siteMetadata {
title
author
description
siteUrl
social {
twitter
}
}
}
}
`
function SEO({ meta, image, title, description, slug }) {
return (
<StaticQuery
query={query}
render={data => {
const { siteMetadata } = data.site
const metaDescription = description || siteMetadata.description
const metaImage = image ? `${siteMetadata.siteUrl}/${image}` : null
const url = `${siteMetadata.siteUrl}${slug}`
return (
<Helmet
htmlAttributes={{ lang: 'en' }}
{...(title
? {
titleTemplate: `%s - ${siteMetadata.title}`,
title,
}
: {
title: siteMetadata.title,
})}
meta={[
{
name: 'description',
content: metaDescription,
},
{
property: 'og:url',
content: url,
},
{
property: 'og:title',
content: title || siteMetadata.title,
},
{
name: 'og:description',
content: metaDescription,
},
{
name: 'twitter:card',
content: 'summary',
},
{
name: 'twitter:creator',
content: siteMetadata.social.twitter,
},
{
name: 'twitter:title',
content: title || siteMetadata.title,
},
{
name: 'twitter:description',
content: metaDescription,
},
]
.concat(
metaImage
? [
{
property: 'og:image',
content: metaImage,
},
{
name: 'twitter:image',
content: metaImage,
},
]
: []
)
.concat(meta)}
/>
)
}}
/>
)
}
SEO.defaultProps = {
meta: [],
title: '',
slug: '',
}
SEO.propTypes = {
description: PropTypes.string,
image: PropTypes.string,
meta: PropTypes.array,
slug: PropTypes.string,
title: PropTypes.string.isRequired,
}
export default SEO