From 3cc9319aabe7d7d726479280666508ac1d42d2cb Mon Sep 17 00:00:00 2001
From: Yusuke Wada <yusuke@kamawada.com>
Date: Thu, 12 Mar 2026 10:10:46 +0900
Subject: [PATCH] feat: end support Node.js v18

---
 .github/workflows/ci.yml | 2 +-
 README.md                | 8 +-------
 package.json             | 2 +-
 src/globals.ts           | 6 ------
 src/listener.ts          | 1 -
 src/request.ts           | 4 ++--
 6 files changed, 5 insertions(+), 18 deletions(-)
 delete mode 100644 src/globals.ts

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0fd4c24..3442aea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [20.x, 22.x, 24.x]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/README.md b/README.md
index af0e931..d9fdf5d 100644
--- a/README.md
+++ b/README.md
@@ -38,13 +38,7 @@ Statistics        Avg      Stdev        Max
 
 ## Requirements
 
-It works on Node.js versions greater than 18.x. The specific required Node.js versions are as follows:
-
-- 18.x => 18.14.1+
-- 19.x => 19.7.0+
-- 20.x => 20.0.0+
-
-Essentially, you can simply use the latest version of each major release.
+It works on Node.js versions greater than 20.x.
 
 ## Installation
 
diff --git a/package.json b/package.json
index 92c4508..1637f71 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "access": "public"
   },
   "engines": {
-    "node": ">=18.14.1"
+    "node": ">=20"
   },
   "devDependencies": {
     "@hono/eslint-config": "^1.0.1",
diff --git a/src/globals.ts b/src/globals.ts
deleted file mode 100644
index 421c8da..0000000
--- a/src/globals.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import crypto from 'node:crypto'
-
-/** jest dose not use crypto in the global, but this is OK for node 18 */
-if (typeof global.crypto === 'undefined') {
-  global.crypto = crypto as Crypto
-}
diff --git a/src/listener.ts b/src/listener.ts
index 83603bf..de57142 100644
--- a/src/listener.ts
+++ b/src/listener.ts
@@ -20,7 +20,6 @@ import {
   buildOutgoingHttpHeaders,
 } from './utils'
 import { X_ALREADY_SENT } from './utils/response/constants'
-import './globals'
 
 const outgoingEnded = Symbol('outgoingEnded')
 type OutgoingHasOutgoingEnded = Http2ServerResponse & {
diff --git a/src/request.ts b/src/request.ts
index ea34768..26400ed 100644
--- a/src/request.ts
+++ b/src/request.ts
@@ -34,8 +34,8 @@ export class Request extends GlobalRequest {
     }
     // Check if body is ReadableStream like. This makes it compatbile with ReadableStream polyfills.
     if (typeof (options?.body as ReadableStream)?.getReader !== 'undefined') {
-      // node 18 fetch needs half duplex mode when request body is stream
-      // if already set, do nothing since a Request object was passed to the options or explicitly set by the user.
+      // Half duplex mode is required when request body is a stream.
+      // If already set, do nothing since a Request object was passed to the options or explicitly set by the user.
       ;(options as any).duplex ??= 'half'
     }
     super(input, options)