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  • import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';
    
    const MEMBER_DETAILS = gql`
      query Member {
        member {
          name
          role
          session @client {
            isLoggedIn
            connectionCount
            errors
          }
        }
      }
    `;
    
    const client = new ApolloClient({
      link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
      cache: new InMemoryCache(),
      resolvers: {
        Member: {
          session() {
            return {
              __typename: 'Session',
              isLoggedIn: someInternalLoginVerificationFunction(),
              connectionCount: calculateOpenConnections(),
              errors: sessionError(),
            };
          }
        }
      },
    });
    Docs
  • import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';
    
    const MEMBER_DETAILS = gql`
      query Member {
        member {
          name
          role
          isLoggedIn @client
        }
      }
    `;
    
    const client = new ApolloClient({
      link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
      cache: new InMemoryCache(),
      resolvers: {
        Member: {
          isLoggedIn() {
            return someInternalLoginVerificationFunction();
          }
        }
      },
    });
    
    // ... run the query using client.query, the <Query /> component, etc.
    Docs
  • import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';
    
    const query = gql`
      query CurrentAuthorPostCount($authorId: Int!) {
        currentAuthorId @client @export(as: "authorId")
        postCount(authorId: $authorId)
      }
    `;
    
    const cache = new InMemoryCache();
    const client = new ApolloClient({
      link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
      cache,
      resolvers: {},
    });
    
    cache.writeQuery({
      query: gql`query GetCurrentAuthorId { currentAuthorId }`,
      data: {
        currentAuthorId: 12345,
      },
    });
    
    // ... run the query using client.query, the <Query /> component, etc.
    Docs
  • import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';
    
    const query = gql`
      query CurrentAuthorPostCount($authorId: Int!) {
        currentAuthor @client {
          name
          authorId @export(as: "authorId")
        }
        postCount(authorId: $authorId)
      }
    `;
    
    const cache = new InMemoryCache();
    const client = new ApolloClient({
      link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
      cache,
      resolvers: {},
    });
    
    cache.writeQuery({
      query: gql`
        query GetCurrentAuthor {
          currentAuthor {
            name
            authorId
          }
        }
      `,
      data: {
        currentAuthor: {
          __typename: 'Author',
          name: 'John Smith',
          authorId: 12345,
        },
      },
    });
    
    // ... run the query using client.query, the <Query /> component, etc.
    Docs
  • import { ApolloClient, InMemoryCache, gql } from '@apollo/client';
    
    const typeDefs = gql`
      extend type Query {
        isLoggedIn: Boolean!
        cartItems: [Launch]!
      }
    
      extend type Launch {
        isInCart: Boolean!
      }
    
      extend type Mutation {
        addOrRemoveFromCart(id: ID!): [Launch]
      }
    `;
    
    const client = new ApolloClient({
      cache: new InMemoryCache(),
      uri: 'http://localhost:4000/graphql',
      typeDefs,
    });
    Docs
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