From e6b442c6c195dfd1d3da6743084dca4db7f40436 Mon Sep 17 00:00:00 2001
From: Yarchik <spoko.dev@gmail.com>
Date: Thu, 3 Sep 2026 00:38:44 +0100
Subject: [PATCH] fix: array-form replacer should not filter Array elements

---
 cjs/index.js  |  2 +-
 esm/index.js  |  2 +-
 test/index.js | 10 ++++++++++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/cjs/index.js b/cjs/index.js
index a4833a5..c70b024 100644
--- a/cjs/index.js
+++ b/cjs/index.js
@@ -86,7 +86,7 @@ exports.parse = parse;
  */
 const stringify = (value, replacer, space) => {
   const $ = replacer && typeof replacer === object ?
-            (k, v) => (k === '' || -1 < replacer.indexOf(k) ? v : void 0) :
+            function (k, v) { return k === '' || Array.isArray(this) || -1 < replacer.indexOf(k) ? v : void 0; } :
             (replacer || noop);
   const known = new Map;
   const input = [];
diff --git a/esm/index.js b/esm/index.js
index eb2da2d..2ea6a5f 100644
--- a/esm/index.js
+++ b/esm/index.js
@@ -84,7 +84,7 @@ export const parse = (text, reviver) => {
  */
 export const stringify = (value, replacer, space) => {
   const $ = replacer && typeof replacer === object ?
-            (k, v) => (k === '' || -1 < replacer.indexOf(k) ? v : void 0) :
+            function (k, v) { return k === '' || Array.isArray(this) || -1 < replacer.indexOf(k) ? v : void 0; } :
             (replacer || noop);
   const known = new Map;
   const input = [];
diff --git a/test/index.js b/test/index.js
index 85c18fd..6a1a52e 100644
--- a/test/index.js
+++ b/test/index.js
@@ -390,6 +390,16 @@ if (typeof Symbol !== 'undefined') {
   );
 }());
 
+(function () {
+  var a = ['a', 'b', 'c'];
+  var json = JSON.stringify(a, ['0']);
+  var restored = Flatted.parse(Flatted.stringify(a, ['0']));
+  console.assert(
+    JSON.stringify(restored) === json,
+    'whitelisted replacer does not filter Array values: '+ json
+  );
+}());
+
 (function () {
   var a = { b: { '': { c: { d: 1 } } } };
   a._circular = a.b[''];