From cc05f92181f74627054ffe89b9fd7c9b78cc8320 Mon Sep 17 00:00:00 2001
From: Tim Kelty <tim@craftcms.com>
Date: Wed, 21 Aug 2024 23:35:57 -0400
Subject: [PATCH] Attach behavior via "as foo" with Closure

---
 framework/base/Component.php           | 2 ++
 tests/framework/base/ComponentTest.php | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/framework/base/Component.php b/framework/base/Component.php
index 7cee3b0720d..9cab8373ae3 100644
--- a/framework/base/Component.php
+++ b/framework/base/Component.php
@@ -190,6 +190,8 @@ public function __set($name, $value)
             $name = trim(substr($name, 3));
             if ($value instanceof Behavior) {
                 $this->attachBehavior($name, $value);
+            } elseif ($value instanceof \Closure) {
+                $this->attachBehavior($name, call_user_func($value));
             } elseif ((isset($value['class']) && is_subclass_of($value['class'], Behavior::class)) || (isset($value['__class']) && is_subclass_of($value['__class'], Behavior::class))) {
                 $this->attachBehavior($name, Yii::createObject($value));
             } elseif (is_string($value) && is_subclass_of($value, Behavior::class, true)) {
diff --git a/tests/framework/base/ComponentTest.php b/tests/framework/base/ComponentTest.php
index dca3c37bd91..725a7ee7878 100644
--- a/tests/framework/base/ComponentTest.php
+++ b/tests/framework/base/ComponentTest.php
@@ -344,6 +344,11 @@ public function testAttachBehavior()
 
         $component->{'as c'} = ['__class' => NewBehavior::class];
         $this->assertNotNull($component->getBehavior('c'));
+
+        $component->{'as d'} = function () {
+            return new NewBehavior();
+        };
+        $this->assertNotNull($component->getBehavior('d'));
     }
 
     public function testAttachBehaviors()