From cf150ecea47cce636fa6ffb4a2d3abfece3e02f1 Mon Sep 17 00:00:00 2001
From: Nikita Skovoroda <chalkerx@gmail.com>
Date: Wed, 17 Dec 2025 21:56:15 +0400
Subject: [PATCH] lib: gbk decoder is gb18030 decoder per spec

---
 lib/internal/encoding.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/internal/encoding.js b/lib/internal/encoding.js
index 61f48f3395fba7..c7a8851652dead 100644
--- a/lib/internal/encoding.js
+++ b/lib/internal/encoding.js
@@ -430,7 +430,9 @@ function makeTextDecoderICU() {
 
     #prepareConverter() {
       if (this[kHandle] !== undefined) return;
-      const handle = getConverter(this[kEncoding], this[kFlags]);
+      let icuEncoding = this[kEncoding];
+      if (icuEncoding === 'gbk') icuEncoding = 'gb18030'; // 10.1.1. GBK's decoder is gb18030's decoder
+      const handle = getConverter(icuEncoding, this[kFlags]);
       if (handle === undefined)
         throw new ERR_ENCODING_NOT_SUPPORTED(this[kEncoding]);
       this[kHandle] = handle;