v4.13.12 v4.13.13

Name: hono
Author: honojs

medium risk

honojs/honoSep 30, 2026 → Oct 4, 20264 days between releases

What's New

Introduces Mount Middleware and deprecates `app.mount()` method

Breaking Changes

Deprecation of `app.mount()` method (removal planned for v5)

New Features

New `hono/mount` middleware package for router mounting
Fixes for JSXNode function component results

Improvements

Upgrade of vite-plus to version 1.0.0
Documentation fixes for request getter jsdoc comments

Bug Fixes

Fixes for network error simulation in parseResponse test

Upgrade Notes

Migrate from `app.mount()` to `app.all('/path/*', mount(handler))` using the new `hono/mount` package. Note that `app.mount()` is deprecated but still functional in v4.

The Two Releases

v4.13.12

Sep 30, 2026· 22 days ago

Contains build fixes to improve type generation and several functional fixes for ETag matching and CSS grid properties.

Full release notes

v4.13.13

Oct 4, 2026· 18 days ago

Introduces a new Mount Middleware module to replace the deprecated `app.mount()` method, along with fixes for JSX rendering and documentation.

Full release notes