v4.13.4

bytedance/deer-flowv4.13.4Aug 24, 2026by yusukebe

Upgrading?

AI Summary

A broad bug fix release improving router wildcard handling, client request fidelity, cookie parsing, and stream stability.

Key Highlights

  • Fix for wildcard middleware association with matching routes.
  • Fixed client handling of undefined headers, cookies, and query/form arrays.
  • Support for custom buildSearchParams in WebSocket clients.
  • Fix for ETag matching with optional whitespace before the comma.

Full Release Notes

## What's Changed
* fix(request): handle params on unmatched requests in https://github.com/honojs/hono/pull/5268
* fix(jsx/dom): execute previous ref cleanup when ref prop changes on re-render  in https://github.com/honojs/hono/pull/5264
* fix(reg-exp-router): associate wildcard middleware with matching routes in https://github.com/honojs/hono/pull/5266
* perf(router): share null object creation in https://github.com/honojs/hono/pull/5267
* fix(etag): match If-None-Match tags with optional whitespace before the comma in https://github.com/honojs/hono/pull/5222
* fix(client): skip undefined header and cookie values in https://github.com/honojs/hono/pull/5244
* fix(client): skip an undefined entry inside a query array in https://github.com/honojs/hono/pull/5272
* fix(client): skip an undefined entry inside a form array in https://github.com/honojs/hono/pull/5280
* fix(client): support custom buildSearchParams and filter undefined query in $ws() bin https://github.com/honojs/hono/pull/5256
* fix(accepts): support wildcard media types and specificity ordering in defaultMatch in https://github.com/honojs/hono/pull/5255
* fix(client): omit empty query delimiter in https://github.com/honojs/hono/pull/5283
* fix(request): drop stale content length for cloned FormData in https://github.com/honojs/hono/pull/5282
* fix(request): serialize cached JSON body in cloneRawRequest in https://github.com/honojs/hono/pull/5288
* fix(cookie): allow parsing signed cookies with empty string values in https://github.com/honojs/hono/pull/5246
* fix(utils/stream): do not let abort listeners crash abort() in https://github.com/honojs/hono/pull/5274

**Full Changelog**: https://github.com/honojs/hono/compare/v4.13.3...v4.13.4

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