From 30a9b80359e63f9fe3ff470a23a844d1b23a1781 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=9C=E5=AD=90?= <xx732395@gmail.com>
Date: Wed, 13 May 2026 23:24:48 +0800
Subject: [PATCH] fix: handle null in isJSONSerializable (#571)

`typeof null` returns `"object"`, not `null`, so the check `t === null`
was dead code. This caused `null` to fall through to the `value.buffer`
check, throwing a TypeError.

Fix by checking `value === null` explicitly before the typeof checks.
Since `null` is valid JSON (`JSON.stringify(null)` === `"null"`),
it should return `true`.
---
 src/utils.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/utils.ts b/src/utils.ts
index a773431b..2e79fc7a 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -18,8 +18,11 @@ export function isJSONSerializable(value: any): boolean {
   if (value === undefined) {
     return false;
   }
+  if (value === null) {
+    return true;
+  }
   const t = typeof value;
-  if (t === "string" || t === "number" || t === "boolean" || t === null) {
+  if (t === "string" || t === "number" || t === "boolean") {
     return true;
   }
   if (t !== "object") {