import React from "react" ; import { Helmet } from "react-helmet" ; import { useStaticQuery , graphql } from "gatsby" ; function SEO ( ) { const { site } = useStaticQuery ( graphql `
      query {
        site {
          siteMetadata {
            title
            description
            author
            keywords
            image
          }
        }
      }
    ` ) ; const metaDescription = site . siteMetadata . description ; const img = `${ site . siteMetadata . siteUrl }${ site . siteMetadata . image }` ; const fullTitle = site . siteMetadata . title ; return ( < Helmet htmlAttributes = { { lang : "en" } } title = { `${ fullTitle } | ${ metaDescription }` } meta = { [ { name : `description` , content : metaDescription } , { property : `og:title` , content : fullTitle } , { property : `og:description` , content : metaDescription } , { property : `og:type` , content : `website` } , { property : `og:image` , content : img } , { name : `twitter:card` , content : `summary` } , { name : `twitter:creator` , content : site . siteMetadata . author } , { name : `twitter:title` , content : fullTitle } , { name : `twitter:description` , content : metaDescription } , { name : `twitter:image` , content : img } , { name : "keywords" , content : site . siteMetadata . keywords . join ( ", " ) } ] } / > ) ; } export default SEO ;