App-Open-Source-per-iPhone-iPad-Apple-Watch-TV/gatsby/src/hooks/useSiteMetadata.ts

import { graphql, useStaticQuery } from 'gatsby'

export interface SiteMetadata {
  title: string
  description: string
}

export default (): SiteMetadata => {
  const data = useStaticQuery(graphql`
    {
      site {
        siteMetadata {
          title
          description
        }
      }
    }
  `)

  return data.site.siteMetadata
}