Support for passing an array of classes as extra attributes (#3537)

* Support for passing an array of classes as extra attributes

* Update rendering-media.md

Author: pascalbaljet

docs/advanced-usage/rendering-media.md

@@ -29,6 +29,16 @@ You can add extra attributes by calling `attributes`.
 Here is the image with some attributes: {{ $media->img()->attributes(['class' => 'my-class']) }}
 ```
 
+You may also pass an array of classes to the `class` attribute. This way, you can conditionally add classes where the key is the class name and the value is a boolean indicating whether the class should be added. Elements with a numeric key will always be added. Under the hood, this uses Laravel `Arr::toCssClasses()` [helper method](https://laravel.com/docs/10.x/helpers#method-array-to-css-classes).
+
+```blade
+Here is the image with some classes: {{ $media->img()->attributes(['class' => [
+    'my-class',
+    'my-other-class' => true,
+    'my-third-class' => false,
+]]) }}
+```
+
 If you want [defer loading offscreen images](https://css-tricks.com/native-lazy-loading/) you can use the `lazy` function.
 
  ```blade

src/MediaCollections/HtmlableMedia.php

@@ -3,6 +3,7 @@
 namespace Spatie\MediaLibrary\MediaCollections;
 
 use Illuminate\Contracts\Support\Htmlable;
+use Illuminate\Support\Arr;
 use Spatie\MediaLibrary\Conversions\ConversionCollection;
 use Spatie\MediaLibrary\Conversions\ImageGenerators\Image;
 use Spatie\MediaLibrary\Conversions\ImageGenerators\ImageGeneratorFactory;
@@ -23,6 +24,10 @@ public function __construct(
 
     public function attributes(array $attributes): self
     {
+        if (is_array($attributes['class'] ?? null)) {
+            $attributes['class'] = Arr::toCssClasses($attributes['class']);
+        }
+
         $this->extraAttributes = $attributes;
 
         return $this;

tests/Feature/Media/ToHtmlTest.php

@@ -35,6 +35,17 @@
     );
 });
 
+it('can render an array of classes as extra attributes', function () {
+    $this->assertEquals(
+        '<img class="rounded border" src="/media/1/conversions/test-thumb.jpg" alt="test">',
+        Media::first()->img('thumb', ['class' => [
+            'rounded',
+            'border' => true,
+            'border-black' => false,
+        ]]),
+    );
+});
+
 test('a media instance is htmlable', function () {
     $media = Media::first();