apollo-client.js

import { ApolloClient, createHttpLink, InMemoryCache } from "@apollo/client";
import { setContext } from "@apollo/client/link/context";

const httpLink = createHttpLink({
  uri: "http://localhost:7500/graphql",
});

const authLink = setContext((_, { headers }) => {
  if (typeof window !== "undefined") {
    const token = localStorage.getItem("cart-token");
    return {
      headers: {
        ...headers,
        authorization: token ? `Bearer ${token}` : "",
      },
    };
  } else {
    return {
      headers,
    };
  }
});

const client = new ApolloClient({
  link: authLink.concat(httpLink),
  cache: new InMemoryCache(),
  defaultOptions: {
    watchQuery: {
      fetchPolicy: "no-cache",
      errorPolicy: "ignore",
    },
    query: {
      fetchPolicy: "no-cache",
      errorPolicy: "all",
    },
  },
});

export default client;