title: GraphQL parser string literal
body: <p>Recently I have started learning GraphQL with <code>react-apollo</code> and I found this piece of code which is interesting for me.</p>
  
  <pre><code>const ALL_LINKS_QUERY = gql`
  query AllLinksQuery {
    allLinks {
      id
      createdAt
      url
      description
    }
  }
  `
  </code></pre>
  
  <p>How can be string literal used so in JavaScript?</p>