From a29f858547cec29ad026c8528cb5a4227fde8fab Mon Sep 17 00:00:00 2001
From: Kridsakorn <kridsakorn@moveplus.co.th>
Date: Sun, 29 Sep 2024 21:34:20 +0700
Subject: [PATCH] fix issue #3455

---
 .changeset/mean-deers-repeat.md | 5 +++++
 packages/formik/src/types.tsx   | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/mean-deers-repeat.md

diff --git a/.changeset/mean-deers-repeat.md b/.changeset/mean-deers-repeat.md
new file mode 100644
index 000000000..8549c7d82
--- /dev/null
+++ b/.changeset/mean-deers-repeat.md
@@ -0,0 +1,5 @@
+---
+'formik': major
+---
+
+fix issue #3455
diff --git a/packages/formik/src/types.tsx b/packages/formik/src/types.tsx
index 71db6792c..d0a34cdd3 100644
--- a/packages/formik/src/types.tsx
+++ b/packages/formik/src/types.tsx
@@ -27,8 +27,8 @@ export type FormikErrors<Values> = {
 export type FormikTouched<Values> = {
   [K in keyof Values]?: Values[K] extends any[]
     ? Values[K][number] extends object // [number] is the special sauce to get the type of array's element. More here https://github.com/Microsoft/TypeScript/pull/21316
-      ? FormikTouched<Values[K][number]>[]
-      : boolean
+      ? FormikTouched<Values[K][number]>[] | boolean | boolean[]
+      : boolean | boolean[]
     : Values[K] extends object
     ? FormikTouched<Values[K]>
     : boolean;