From 0bc87161cc71aceb2e2f3b5b1a9f770dba2c0560 Mon Sep 17 00:00:00 2001
From: EduardF1 <50618110+EduardF1@users.noreply.github.com>
Date: Mon, 4 May 2026 23:56:21 +0200
Subject: [PATCH 1/2] fix: correct isJSONSerializable to handle null without
 throwing

---
 src/utils.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utils.ts b/src/utils.ts
index a773431b..408b346e 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -19,7 +19,7 @@ export function isJSONSerializable(value: any): boolean {
     return false;
   }
   const t = typeof value;
-  if (t === "string" || t === "number" || t === "boolean" || t === null) {
+  if (t === "string" || t === "number" || t === "boolean" || value === null) {
     return true;
   }
   if (t !== "object") {

From a6cf69a7b1371ff4c0b6d0d96cea92886c98758f Mon Sep 17 00:00:00 2001
From: EduardF1 <50618110+EduardF1@users.noreply.github.com>
Date: Tue, 30 Jun 2026 14:50:08 +0200
Subject: [PATCH 2/2] test: cover null JSON serialization

---
 test/index.test.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/index.test.ts b/test/index.test.ts
index 5ac20b07..5ac7c4d1 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -10,6 +10,7 @@ import {
 import { Readable } from "node:stream";
 import { H3, HTTPError, readBody, serve } from "h3";
 import { $fetch } from "../src/index.ts";
+import { isJSONSerializable } from "../src/utils.ts";
 
 describe("ofetch", () => {
   let listener: ReturnType<typeof serve>;
@@ -158,6 +159,10 @@ describe("ofetch", () => {
     }
   });
 
+  it("treats null as JSON serializable", () => {
+    expect(isJSONSerializable(null)).toBe(true); // eslint-disable-line unicorn/no-null
+  });
+
   it("does not stringify body when content type != application/json", async () => {
     const message = '"Hallo von Pascal"';
     const { body } = await $fetch(getURL("echo"), {