fix(plugin-fetch): avoid relying on global BodyInit in Node projects by stijnvanhulle · Pull Request #839 · kubb-labs/plugins

stijnvanhulle · 2026-09-03T13:59:39Z

🎯 Changes

@kubb/plugin-fetch and @kubb/plugin-axios emit generated client and serializer files that referenced the global BodyInit type. A Node-only TypeScript project (@types/node without the dom library) declares RequestInit, Request, and Response globally, but not BodyInit, so the generated code failed to type-check with Cannot find name 'BodyInit'.

Both templates now define a module-local RequestBody type derived from RequestInit['body'] and use it everywhere BodyInit was referenced. This resolves the same way BodyInit did in a browser or full-dom project, but no longer depends on a global name a Node-only project doesn't declare.

Fixes #833

Files changed

packages/plugin-fetch/templates/fetch.ts and templates/serializers.ts
packages/plugin-axios/templates/serializers.ts (shares the same serializer template)
Generated snapshots in tests/3.0.x/__snapshots__/ and examples/*/src/gen/.kubb/, refreshed to match
docs submodule's snippets/how-to/transport.md updated to match the new type name

✅ Checklist

I have followed the steps in the Contributing guide.
I have tested this code locally with pnpm run test.

🚀 Release Impact

This change affects published code, and I have generated a changeset.
This change is for the docs (no release).

🤖 Generated with Claude Code

https://claude.ai/code/session_01H2LADp1sJjG9BQz5sQbsBX

Generated by Claude Code

The generated .kubb/client.ts and .kubb/serializers.ts referenced the global BodyInit type, which a Node-only project (@types/node without the dom lib) never declares. Both files now use a local RequestBody type derived from RequestInit['body'], which resolves the same way without requiring a global BodyInit name. plugin-axios shares the same serializers.ts template and gets the same fix. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01H2LADp1sJjG9BQz5sQbsBX

codesandbox · 2026-09-03T13:59:42Z

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coldtea-pr-lens · 2026-09-03T13:59:44Z

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🟢 +0 new · 🟠 ~8 changed · 🔴 -0 removed · 0 flows · 12 files · commit eddfd39

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HTTP Clients — 2 components

🟡 CHANGED @⁠kubb/plugin-fetch

Fetch API client generator; updated runtime and serializer templates to type request bodies via RequestInit['body'] instead of global BodyInit.

🟡 CHANGED @⁠kubb/plugin-axios

Axios client generator; updated serializer templates to replace global BodyInit references with RequestBody derived from RequestInit.

packages/plugin-axios/templates/serializers.ts:4-175

Examples ＆ Suites — 6 components

🟡 CHANGED Advanced PetStore Pipeline

Advanced pipeline example with regenerated serializers adopting RequestBody.

examples/advanced/src/gen/.kubb/serializers.ts:4-175

🟡 CHANGED React Query Example

React Query client example with regenerated runtime client and serializers.

🟡 CHANGED Fetch Client Example

Fetch client example app with regenerated runtime client and serializer files.

🟡 CHANGED Axios Client Example

Axios client example app with regenerated serializer utilities.

examples/axios/src/gen/.kubb/serializers.ts:4-175

🟡 CHANGED MCP Server Example

MCP server example app with updated serializers.

examples/mcp/src/gen/.kubb/serializers.ts:4-175

🟡 CHANGED OpenAPI 3.0 Integration Tests

Snapshot integration test suite updated across fetch, axios, mcp, react-query, swr, and vue-query fixtures.

tests/3.0.x/package.json

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changeset-bot · 2026-09-03T13:59:45Z

🦋 Changeset detected

Latest commit: eddfd39

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@kubb/plugin-fetch	Patch
@kubb/plugin-axios	Patch

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coderabbitai · 2026-09-03T13:59:48Z

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github-actions · 2026-09-03T14:03:25Z

Size Change: 0 B

Total Size: 312 kB

ℹ️ View Unchanged

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`packages/plugin-axios/dist/index.js`	15 kB
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`packages/plugin-zod/dist/index.cjs`	19.7 kB
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_{compressed-size-action}

pkg-pr-new · 2026-09-03T14:03:34Z

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@kubb/plugin-axios

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commit: eddfd39

stijnvanhulle mentioned this pull request Sep 3, 2026

fix(fetch): update transport doc for RequestBody type rename kubb-labs/docs#200

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fix(plugin-fetch): avoid relying on global BodyInit in Node projects - #839

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