v4.0.0-alpha.12

Major Changes

• #12586 605db8e Thanks @jerelmiller! - Remove the typeDefs option from ApolloClient.

• #12588 eed825a Thanks @jerelmiller! - Remove TContext generic argument from all types that use it. TContext is replaced with DefaultContext which can be modified using declaration merging.

• #12590 a005e82 Thanks @jerelmiller! - Drop graphql v15 as a valid peer dependency.

• #12591 a7e7383 Thanks @jerelmiller! - Rename the @apollo/client/link/core entrypoint to @apollo/client/link.

• #12589 15f5a1c Thanks @jerelmiller! - Require the link option when instantiating ApolloClient. This removes the uri, credentials and headers options from ApolloClient in favor of passing an instantiated HttpLink directly. To migrate:

  If using uri, credentials, or headers options

  new ApolloClient({
    // ...
  - uri,
  - credentials,
  - headers,
  + link: new HttpLink({ uri, credentials, headers }),
  // or if you prefer the function call approach:
  + link: createHttpLink({ uri, credentials, headers }),
  });
  

  If creating a client without the link option

  new ApolloClient({
    // ...
  + link: ApolloLink.empty()
  });