[11.x] Fix for breaking change in #53543 when ::withoutWrapping() is called after instance creation

src/Illuminate/Http/Resources/Json/JsonResource.php

@@ -49,6 +49,13 @@ class JsonResource implements ArrayAccess, JsonSerializable, Responsable, UrlRou
      */
     public $wrapper = null;
 
+    /**
+     * Indicates if the wrapper has been set on this instance.
+     *
+     * @var bool
+     */
+    public $wrapperSet = false;
+
     /**
      * The "data" wrapper that should be applied.
      *
@@ -65,8 +72,6 @@ class JsonResource implements ArrayAccess, JsonSerializable, Responsable, UrlRou
     public function __construct($resource)
     {
         $this->resource = $resource;
-
-        $this->withWrapper(static::$wrap);
     }
 
     /**
@@ -218,6 +223,7 @@ public function withResponse(Request $request, JsonResponse $response)
     public function withWrapper(?string $value)
     {
         $this->wrapper = $value;
+        $this->wrapperSet = true;
 
         return $this;
     }

src/Illuminate/Http/Resources/Json/ResourceResponse.php

@@ -106,7 +106,7 @@ protected function haveAdditionalInformationAndDataIsUnwrapped($data, $with, $ad
      */
     protected function wrapper()
     {
-        return $this->resource instanceof JsonResource
+        return $this->resource instanceof JsonResource && $this->resource->wrapperSet
             ? $this->resource->wrapper
             : get_class($this->resource)::$wrap;
     }

tests/Integration/Http/ResourceTest.php

@@ -233,6 +233,29 @@ public function testResourceCollectionCanSetWithoutWrapper()
         ]);
     }
 
+    public function testResourcesCanSetWithoutWrappingAfterCreatingInstance()
+    {
+        Route::get('/', function () {
+            $resource = new PostResource(new Post([
+                'id' => 5,
+                'title' => 'Test Title',
+            ]));
+
+            $resource::withoutWrapping();
+
+            return $resource;
+        });
+
+        $response = $this->withoutExceptionHandling()->get(
+            '/', ['Accept' => 'application/json']
+        );
+
+        $response->assertJson([
+            'id' => 5,
+            'title' => 'Test Title',
+        ]);
+    }
+
     public function testResourcesMayHaveOptionalValues()
     {
         Route::get('/', function () {