resolvers.js

export const HtmlPage = new GraphQLObjectType({
  name: 'HtmlPage',
  fields: () => ({
    url: {
      type: GraphQLString,
      resolve(root, args, context) {
        return root.url;
      }
    },
    hostname: {
      type: GraphQLString,
      resolve(root, args, context) {
        const match = root.url.match(/^(https?\:)\/\/(([^:\/?#]*)(?:\:([0-9]+))?)([\/]{0,1}[^?#]*)(\?[^#]*|)(#.*|)$/);
        return match && match[3];
      }
    },
    title: {
      type: GraphQLString,
      resolve: async (root, args, context) => {
        const res = await fetch(root.url);
        const $ = cheerio.load(await res.text());
        return $('title').text();
      }
    }
  })
});