From 2243b87255f228f1052ba457c4eaed37dce55047 Mon Sep 17 00:00:00 2001
From: Patrik Gustafsson <paven@users.noreply.github.com>
Date: Tue, 4 Nov 2025 23:02:26 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=A4=96=20Merge=20PR=20#73942=20Adding=20r?=
 =?UTF-8?q?enamedHeaders=20to=20papaparse=20ParesMeta.=20to=20align=20with?=
 =?UTF-8?q?=20papaparse=205.5.3=20by=20@paven?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 types/papaparse/index.d.ts         | 3 +++
 types/papaparse/package.json       | 2 +-
 types/papaparse/papaparse-tests.ts | 9 +++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/types/papaparse/index.d.ts b/types/papaparse/index.d.ts
index 3f4df705b35b11..2bac4442033840 100644
--- a/types/papaparse/index.d.ts
+++ b/types/papaparse/index.d.ts
@@ -450,6 +450,9 @@ export interface ParseMeta {
     /** Whether preview consumed all input */
     truncated: boolean;
     cursor: number;
+    /** Headers that are automatically renamed by the library to avoid duplication.
+     * {Column 1_1: 'Column 1'} the later header 'Column 1' was renamed to 'Column 1_1'}**/
+    renamedHeaders?: Record<string, string>;
 }
 
 /**
diff --git a/types/papaparse/package.json b/types/papaparse/package.json
index 8ade38bcff284b..3ac41f73cc9f87 100644
--- a/types/papaparse/package.json
+++ b/types/papaparse/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/papaparse",
-    "version": "5.3.9999",
+    "version": "5.5.9999",
     "projects": [
         "https://github.com/mholt/PapaParse"
     ],
diff --git a/types/papaparse/papaparse-tests.ts b/types/papaparse/papaparse-tests.ts
index 3a8d20a9a82e4c..d7c0f4ea428451 100644
--- a/types/papaparse/papaparse-tests.ts
+++ b/types/papaparse/papaparse-tests.ts
@@ -321,3 +321,12 @@ const parser = new Papa.Parser({});
 parser.getCharIndex();
 parser.abort();
 parser.parse("", 0, false);
+
+Papa.parse("a,a,b,c", {
+    complete(results) {
+        // $ExpectType Record<string, string> | undefined
+        results.meta.renamedHeaders;
+        // $ExpectType string | undefined
+        const maybe = results.meta.renamedHeaders?.a;
+    },
+});