From dc992f76f423a39f37ea1cced5bd6fa456b70f02 Mon Sep 17 00:00:00 2001
From: Sebastian Klaus <30407863+klausi85@users.noreply.github.com>
Date: Thu, 12 Jun 2025 08:16:03 +0200
Subject: [PATCH] [TwigComponent] Fix escaping of Alpine.js attribute keys
 containing numeric characters

---
 src/TwigComponent/src/ComponentAttributes.php            | 2 +-
 src/TwigComponent/tests/Unit/ComponentAttributesTest.php | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/TwigComponent/src/ComponentAttributes.php b/src/TwigComponent/src/ComponentAttributes.php
index 82f9a5cdd41..bd4029145e2 100644
--- a/src/TwigComponent/src/ComponentAttributes.php
+++ b/src/TwigComponent/src/ComponentAttributes.php
@@ -80,7 +80,7 @@ public function __toString(): string
             //      xml:*, xmlns:*,
             // - special syntax names (Vue.js, Svelte, Alpine.js, ...)
             //      v-*, x-*, @*, :*
-            if (!ctype_alpha(str_replace(['-', '_', ':', '@', '.'], '', $key))) {
+            if (!ctype_alnum(str_replace(['-', '_', ':', '@', '.'], '', $key))) {
                 $key = (string) $this->escaper->escape($key, 'html_attr');
             }
 
diff --git a/src/TwigComponent/tests/Unit/ComponentAttributesTest.php b/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
index 377822c3118..255364ca48e 100644
--- a/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
+++ b/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
@@ -324,6 +324,7 @@ public static function provideSpecialSyntaxAttributeNames(): iterable
         yield ['@click'];
         // Alpine.js
         yield ['x-on:click'];
+        yield ['@input.debounce.500ms'];
     }
 
     public function testThrowsTypeErrorWithoutEscaperRuntime(): void