@apollo/client

Fix an issue where custom scalar values that are not JSON-serializable caused errors. These values are properly serialized when used as input for variables or when used as a key field value so that cache writes and calls to cache.identify succeed.

Require the variables option in useFragment when the fragment has required variables. This matches the behavior of useSuspenseFragment and the query hooks.

Parse custom scalar fields in subscription results when using the no-cache fetch policy.

Fix an issue where a list field selected more than once with different selection sets lost the fields that only one of the selections included while a @defer boundary elsewhere in the query was still pending when using the GraphQL17Alpha9Handler. The results of all selections of the list field are now merged.

Fixed a bug where streamFieldInfo might not have been passed into custom merge functions for

Fix Missing field errors being logged when writing @defer results where a parent field is selected both inside and outside of a deferred fragment. Fields whose @defer boundary has not been delivered from the network are no longer reported as missing.

Unregister the watch when an immediate cache.watch broadcast throws. Previously the watch was added to the cache before its first read, and a read that threw left the watch registered while the caller never received the unsubscribe function, so it could not be removed and every later broadcast ran into the same failing read.

Defer20220824Handler: fix a situation where dataState would show up as completed with incremental errors instead of staying streaming.

Fix a memory leak in isDeferredFragment/isStreamField

Fix an unhandled AbortError promise rejection that occurred when unsubscribing from a multipart HTTP subscription.

Fix an issue where useLazyQuery did not rerender with new variables until the network request had completed when calling execute with new variables while a request was already in-flight.

Field policies and inputObjects can now tell the cache whether a field is a list of scalars or a scalar whose value is an array. Previously all arrays were iterated and only the inner type was provided to the scalar parse/serialize functions.

Adds Scalar.fromGraphQLScalarType helper to create a Scalar instance from an existing graphql.js GraphQLScalarType.

The minimum supported TypeScript version is now 5.9.x.

Adds the plumbing and types implementation for declaring custom scalars and configuring custom scalars in InMemoryCache.

Preserve multi-byte UTF-8 characters split across multipart response chunks.

Add a development-only warning when a network result is written to the cache but reading the query back from the cache returns a partial result. This usually points at a merge or read function that did not repair missing fields in the cache, which prevents Apollo Client from applying the cache result to the data received by the network.

Fix type signature of some DocumentationTypes to fix their display in our documentation.