diff --git a/src/AbstractForm.php b/src/AbstractForm.php
index c90e2fd..f32d33d 100644
--- a/src/AbstractForm.php
+++ b/src/AbstractForm.php
@@ -113,6 +113,13 @@ public function getTemplateFile(): string
 	}
 
 
+	public function isPreventLeavingWhenDirty(): bool
+	{
+		$rc = new ReflectionClass($this);
+		return (bool) $rc->getAttributes(PreventLeavingWhenDirty::class);
+	}
+
+
 	public function setTranslator(Translator $translator = null): void
 	{
 		$this->translator = $translator;
@@ -278,6 +285,11 @@ public function render(): void
 		$template->setParameters([
 			'layout' => $this->layout,
 			'form' => $form,
+
+			'formOptions' => [
+				'data-check-dirty' => $this->isPreventLeavingWhenDirty(),
+				'data-form-name' => $this->getName(),
+			],
 		]);
 
 		$template->render();
diff --git a/src/Attributes/PreventLeavingWhenDirty.php b/src/Attributes/PreventLeavingWhenDirty.php
new file mode 100644
index 0000000..ecf571e
--- /dev/null
+++ b/src/Attributes/PreventLeavingWhenDirty.php
@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+/**
+ * @copyright Martin Procházka (c) 2024
+ * @license   MIT License
+ */
+
+namespace JuniWalk\Form\Attributes;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_CLASS)]
+class PreventLeavingWhenDirty
+{
+}
diff --git a/src/templates/@layout-accordion.latte b/src/templates/@layout-accordion.latte
index 4fe7c7e..7d14ac6 100644
--- a/src/templates/@layout-accordion.latte
+++ b/src/templates/@layout-accordion.latte
@@ -6,7 +6,7 @@
 {default $headColor = null}
 
 <div id="{$control->getName()}" n:class="card, 'card-'.$color, !isset($headColor) || $headColor != $color ? card-outline">
-<form n:name="form" data-form-name="{$control->getName()}">
+<form n:name="form" n:attr="...$formOptions">
 
 	<a class="d-block w-100 collapsed" data-toggle="collapse" href="#{$control->getUniqueId()}-content">
 		<div n:class="card-header, isset($headColor) ? 'bg-'.$headColor">
diff --git a/src/templates/@layout-card.latte b/src/templates/@layout-card.latte
index 5b70d45..c83cbf7 100644
--- a/src/templates/@layout-card.latte
+++ b/src/templates/@layout-card.latte
@@ -6,7 +6,7 @@
 {default $headColor = null}
 
 <div id="{$control->getName()}" n:class="card, 'card-'.$color, !isset($headColor) || $headColor != $color ? card-outline">
-<form n:name="form" data-form-name="{$control->getName()}">
+<form n:name="form" n:attr="...$formOptions">
 
 	<div n:class="card-header, isset($headColor) ? 'bg-'.$headColor">
 		<h3 class="card-title" n:ifset="block title">{include #title|noescape}</h3>
diff --git a/src/templates/@layout-modal.latte b/src/templates/@layout-modal.latte
index f85b8a5..ac6a243 100644
--- a/src/templates/@layout-modal.latte
+++ b/src/templates/@layout-modal.latte
@@ -1,4 +1,4 @@
-<div class="modal fade" id="{$control->getName()}" n:attr="... $modalOptions" tabindex="-1">
+<div class="modal fade" id="{$control->getName()}" n:attr="...$modalOptions" tabindex="-1">
 
 {default $size = null}
 
@@ -9,7 +9,7 @@
 {default $contentClass = null}
 {default $contentPos = 'top'}
 
-<form n:name="form" class="w-100" data-form-name="{$control->getName()}">
+<form n:name="form" class="w-100" n:attr="...$formOptions">
 
 	<div class="modal-content">