pokemonTypeConnections.js

const pokemonType = new GraphQLObjectType({
  name: 'pokemon',
  fields: () => ({
    id: {type: GraphQLString},
    name: {type: GraphQLString},
    thumbnail: {type: GraphQLString},
    //our favoriteMove is a moveType, which was defined earlier. 
    favoriteMove: {
      type: moveType,
      resolve: (parent, _) => moves[parent.id], //defines how this query is fulfilled.
    },
    //our bestFriend field is a (recursive) pokemonType.
    bestFriend: {
      type: pokemonType,
      resolve: (parent, _) => friends[parent.id],
    }
  }),
});