●Change8

Migrating to Apollo Client @apollo/client@4.0.7

Version @apollo/client@4.0.7 introduces 1 breaking change. This guide details how to update your code.

Released: 9/30/2025

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Breaking Changes
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Migration Steps
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Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

GraphQLWsLink

Breaking Changes

●Issue #1

`GraphQLWsLink` no longer includes the `operationType` field in the payload it sends. Servers or middleware that relied on this field will receive payloads without it, potentially causing errors. To fix, update the server to not require `operationType` or manually add the field in a custom link.

Migration Steps

  1. 1
    If your GraphQL server expects `operationType` in the WebSocket payload, modify the server to ignore the missing field or add a custom link that injects `operationType` back into the payload.

Release Summary

Patch release removes the `operationType` field from `GraphQLWsLink` payloads, fixing related bugs but may require server adjustments.

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View the full release notes and all changes for Apollo Client @apollo/client@4.0.7.

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