link-state-api.js

const query = gql`
  # query CartItems {
  #  cartItemIds @client @export(as: "ids")
  # }

  query Cart($ids: [Id]!) {
    # $ids: cartItemIds @client
    cartItemIds @client @export(as: "ids")

    cart(itemIds: $ids) {
      items {
        name
      }
    }
  }
`;

const mutation = gql`
  mutation {
    createUser(id: 1) {
      user {
        id
      }
    }

    saveUser(id: 1) @client
  }
`;

const localMutation = gql`
  mutation {
    saveUser(id: 1) @client
  }
`;

const withLocalData = gql`
  query CartItems {
    items @client @export(as "ids") {
      id
    }
  }

  mutation SaveCartItems {
    saveCart($ids: [ID]!) {
      saveCart(ids: $ids)
    }
  }
`;