From c1bda2d4bdfcabb99dda1303783493fd7e1cf9b4 Mon Sep 17 00:00:00 2001
From: Minha Kang <118591632+m2na7@users.noreply.github.com>
Date: Fri, 29 Aug 2025 01:17:43 +0900
Subject: [PATCH 1/3] fix(form-core): add support for Date object comparison

---
 packages/form-core/src/utils.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/form-core/src/utils.ts b/packages/form-core/src/utils.ts
index 3b0186e35..eedb2bce6 100644
--- a/packages/form-core/src/utils.ts
+++ b/packages/form-core/src/utils.ts
@@ -431,6 +431,10 @@ export function evaluate<T>(objA: T, objB: T) {
     return false
   }
 
+  if (objA instanceof Date && objB instanceof Date) {
+    return objA.getTime() === objB.getTime()
+  }
+
   if (objA instanceof Map && objB instanceof Map) {
     if (objA.size !== objB.size) return false
     for (const [k, v] of objA) {
@@ -539,3 +543,4 @@ export function createFieldMap<T>(values: Readonly<T>): { [K in keyof T]: K } {
 
   return output
 }
+

From cc5bfa9f3fc0f2246ec34e18573477cd92e77d2f Mon Sep 17 00:00:00 2001
From: Minha Kang <118591632+m2na7@users.noreply.github.com>
Date: Fri, 29 Aug 2025 01:17:55 +0900
Subject: [PATCH 2/3] test(form-core): add tests for Date object comparison

---
 packages/form-core/tests/utils.spec.ts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/packages/form-core/tests/utils.spec.ts b/packages/form-core/tests/utils.spec.ts
index 08966f330..b97316648 100644
--- a/packages/form-core/tests/utils.spec.ts
+++ b/packages/form-core/tests/utils.spec.ts
@@ -648,6 +648,24 @@ describe('evaluate', () => {
     )
     expect(objComplexTrue).toEqual(true)
   })
+
+  it('should test equality between Date objects', () => {
+    const date1 = new Date('2025-01-01T00:00:00.000Z')
+    const date2 = new Date('2025-01-01T00:00:00.000Z')
+    const date3 = new Date('2025-01-02T00:00:00.000Z')
+
+    const dateTrue = evaluate(date1, date2)
+    expect(dateTrue).toEqual(true)
+
+    const dateFalse = evaluate(date1, date3)
+    expect(dateFalse).toEqual(false)
+
+    const dateObjectTrue = evaluate({ date: date1 }, { date: date2 })
+    expect(dateObjectTrue).toEqual(true)
+
+    const dateObjectFalse = evaluate({ date: date1 }, { date: date3 })
+    expect(dateObjectFalse).toEqual(false)
+  })
 })
 
 describe('concatenatePaths', () => {

From c010d5d5d378efc4f88c01c8f46af0c8e9ef9406 Mon Sep 17 00:00:00 2001
From: Minha Kang <118591632+m2na7@users.noreply.github.com>
Date: Fri, 29 Aug 2025 01:20:50 +0900
Subject: [PATCH 3/3] refactor(form-core): remove unnecessary blank line in
 utils.ts

---
 packages/form-core/src/utils.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/packages/form-core/src/utils.ts b/packages/form-core/src/utils.ts
index eedb2bce6..dd5476d40 100644
--- a/packages/form-core/src/utils.ts
+++ b/packages/form-core/src/utils.ts
@@ -543,4 +543,3 @@ export function createFieldMap<T>(values: Readonly<T>): { [K in keyof T]: K } {
 
   return output
 }
-