From 7f821c1ef9ca320a2546f2e17070b0e7a284335f Mon Sep 17 00:00:00 2001
From: 256x256 <73885021+256x256@users.noreply.github.com>
Date: Tue, 14 Apr 2026 10:16:10 +0900
Subject: [PATCH] fix: Object key starting with 0 as string.

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

diff --git a/src/tosource.ts b/src/tosource.ts
index 6d5f574..245b23c 100644
--- a/src/tosource.ts
+++ b/src/tosource.ts
@@ -107,6 +107,6 @@ const KEYWORD_REGEXP =
 
 function legalKey(key: string) {
   return (
-    /^([a-z_$][0-9a-z_$]*|[0-9]+)$/gi.test(key) && !KEYWORD_REGEXP.test(key)
+    /^([a-z_$][0-9a-z_$]*|0|[1-9][0-9]*)$/gi.test(key) && !KEYWORD_REGEXP.test(key)
   );
 }