v3.9.0-alpha.3

Minor Changes

• #11301 46ab032af Thanks @alessbell! - Add multipart subscription network adapters for Relay and urql

  Relay

  import { createFetchMultipartSubscription } from "@apollo/client/utilities/subscriptions/relay";
  import { Environment, Network, RecordSource, Store } from "relay-runtime";
  
  const fetchMultipartSubs = createFetchMultipartSubscription(
    "http://localhost:4000"
  );
  
  const network = Network.create(fetchQuery, fetchMultipartSubs);
  
  export const RelayEnvironment = new Environment({
    network,
    store: new Store(new RecordSource()),
  });

  Urql

  import { createFetchMultipartSubscription } from "@apollo/client/utilities/subscriptions/urql";
  import { Client, fetchExchange, subscriptionExchange } from "@urql/core";
  
  const url = "http://localhost:4000";
  
  const multipartSubscriptionForwarder = createFetchMultipartSubscription(url);
  
  const client = new Client({
    url,
    exchanges: [
      fetchExchange,
      subscriptionExchange({
        forwardSubscription: multipartSubscriptionForwarder,
      }),
    ],
  });

Patch Changes

• #11275 3862f9ba9 Thanks @phryneas! - Add a defaultContext option and property on ApolloClient, e.g. for keeping track of changing auth tokens or dependency injection.

  This can be used e.g. in authentication scenarios, where a new token might be
  generated outside of the link chain and should passed into the link chain.

  import { ApolloClient, createHttpLink, InMemoryCache } from "@apollo/client";
  import { setContext } from "@apollo/client/link/context";
  
  const httpLink = createHttpLink({
    uri: "/graphql",
  });
  
  const authLink = setContext((_, { headers, token }) => {
    return {
      headers: {
        ...headers,
        authorization: token ? `Bearer ${token}` : "",
      },
    };
  });
  
  const client = new ApolloClient({
    link: authLink.concat(httpLink),
    cache: new InMemoryCache(),
  });
  
  // somewhere else in your application
  function onNewToken(newToken) {
    // token can now be changed for future requests without need for a global
    // variable, scoped ref or recreating the client
    client.defaultContext.token = newToken;
  }

• #11297 c8c76a522 Thanks @jerelmiller! - Add an explicit return type for the useReadQuery hook called UseReadQueryResult. Previously the return type of this hook was inferred from the return value.