From 32e35f27d73a31a8aabf2c40ac32184cd687efd1 Mon Sep 17 00:00:00 2001
From: Vladyslav_Prykhodko <vprykhodko@thingsboard.io>
Date: Mon, 3 Nov 2025 13:48:42 +0200
Subject: [PATCH] UI: Fix email validator to allow empty values

---
 ui-ngx/src/app/core/utils.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ui-ngx/src/app/core/utils.ts b/ui-ngx/src/app/core/utils.ts
index fe974f54a8..e0fadd768a 100644
--- a/ui-ngx/src/app/core/utils.ts
+++ b/ui-ngx/src/app/core/utils.ts
@@ -992,6 +992,9 @@ export const trimDefaultValues = (input: Record<string, any>, defaults: Record<s
 }
 
 export const validateEmail = (control: AbstractControl): ValidationErrors | null => {
+  if (isUndefinedOrNull(control.value) || (typeof control.value === 'string' && control.value.length === 0)) {
+    return null;
+  }
   return emailRegex.test(control.value) ? null : {email: true};
 };