urql-graphql/urql @urql/core@3.1.0

on GitHub

Minor Changes

• Implement mapExchange, which replaces errorExchange, allowing onOperation and onResult to be called to either react to or replace operations and results. For backwards compatibility, this exchange is also exported as errorExchange and supports onError, by @kitten (See #2846)

Patch Changes

• Move remaining Variables generics over from object default to Variables extends AnyVariables = AnyVariables. This has been introduced previously in #2607 but some missing ports have been missed due to TypeScript not catching them previously. Depending on your TypeScript version the object default is incompatible with AnyVariables, by @kitten (See #2843)
• Reuse output of stringifyDocument in place of repeated print. This will mean that we now prevent calling print repeatedly for identical operations and are instead only reusing the result once.
  This change has a subtle consequence of our internals. Operation keys will change due to this
  refactor and we will no longer sanitise strip newlines from queries that @urql/core has printed, by @kitten (See #2847)
• Update to wonka@^6.1.2 to fix memory leak in fetch caused in Node.js by a lack of clean up after initiating a request, by @kitten (See #2850)