@apollo/client

Apollo Client 3.4.6

Improvements

• Reevaluate window.fetch each time HttpLink uses it, if not configured using options.fetch. This change enables a variety of strategies for instrumenting window.fetch, without requiring those strategies to run before @apollo/client/link/http is first imported.
  @benjamn in #8603

• Clarify mutation fetchPolicy options ("network-only" or "no-cache") using MutationFetchPolicy union type.
  @benjamn in #8602

Bug Fixes

• Restore full @apollo/client/apollo-client.cjs.js CommonJS bundle for older bundlers.

  Note that Node.js and CommonJS bundlers typically use the bundles specified by "main" fields in our generated package.json files, which are all independent and non-overlapping CommonJS modules. However, apollo-client.cjs.js is just one big bundle, so mixing imports of apollo-client.cjs.js with the other CommonJS bundles is discouraged, as it could trigger the dual package hazard. In other words, please don't start using apollo-client.cjs.js if you're not already.

  @benjamn in #8592

• Log MissingFieldErrors in ObservableQuery#getCurrentResult using invariant.debug, rather than reporting them via result.error.
  @benjamn in #8604