use PostMount hook for HasAttributesTrait to add extra data as attributes

Author: kbond

src/TwigComponent/src/HasAttributesTrait.php

@@ -12,6 +12,7 @@
 namespace Symfony\UX\TwigComponent;
 
 use Symfony\UX\LiveComponent\Attribute\LiveProp;
+use Symfony\UX\TwigComponent\Attribute\PostMount;
 use Symfony\UX\TwigComponent\Attribute\PreMount;
 
 /**
@@ -25,13 +26,26 @@ trait HasAttributesTrait
     public ComponentAttributes $attributes;
 
     #[PreMount]
-    public function mapAttributes(array $data): array
+    public function preMountAttributes(array $data): array
     {
-        $data['attributes'] = new ComponentAttributes($data['attributes'] ?? []);
+        $data['_attributes'] = $data['attributes'] ?? [];
+
+        unset($data['attributes']);
 
         return $data;
     }
 
+    #[PostMount]
+    public function mountAttributes(array $data): array
+    {
+        $attributes = array_merge($data['_attributes'], $data);
+        unset($attributes['_attributes']);
+
+        $this->attributes = new ComponentAttributes($attributes);
+
+        return [];
+    }
+
     public static function dehydrateAttributes(ComponentAttributes $attributes): array
     {
         return $attributes->all();