Issue #3364903 by SadySierralta, gausarts: W3C validation - Bad value for...

Issue #3364903 by SadySierralta, gausarts: W3C validation - Bad value for attribute srcset on element source

CHANGELOG.txt

 
+Blazy 8.x-2.0-dev, 2023-06-07
+------------------------------
+- Issue #3364903 by SadySierralta, gausarts: W3C validation - Bad value for
+  attribute srcset on element source.
+
 Blazy 8.x-2.0-dev, 2023-06-02
 ------------------------------
 - Fixed for D10 breaking changes with Blazy lightboxes within Views.

src/BlazyInterface.php

@@ -7,13 +7,6 @@ namespace Drupal\blazy;
  */
 interface BlazyInterface {
 
-  /**
-   * Defines constant placeholder Data URI image.
-   *
-   * @todo deprecated and removed for Placeholder::DATA anytime.
-   */
-  const PLACEHOLDER = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
-
   /**
    * Returns the app root.
    *

src/Media/Placeholder.php

@@ -11,12 +11,22 @@ use Drupal\blazy\Blazy;
  */
 class Placeholder {
 
+  /**
+   * Defines constant placeholder  blank URL.
+   */
+  const BLANK = 'about:blank';
+
   /**
    * Defines constant placeholder Data URI image.
    *
    * <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1 1"/>
    */
-  const DATA = 'data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D"http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg"%20viewBox%3D"0%200%201%201"%2F%3E';
+  const DATA = "data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%201%201'%2F%3E";
+
+  /**
+   * Defines constant placeholder Data URI image.
+   */
+  const GIF = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
 
   /**
    * Build out the blur image.

src/Theme/BlazyTheme.php

@@ -147,7 +147,7 @@ class BlazyTheme {
         foreach ($files as $file) {
           $source_attributes = &$file['source_attributes'];
           $source_attributes->setAttribute('data-src', $source_attributes['src']->value());
-          $source_attributes->setAttribute('src', '');
+          $source_attributes->setAttribute('src', Placeholder::BLANK);
         }
       }
 
@@ -194,7 +194,7 @@ class BlazyTheme {
           /** @var \Drupal\Core\Template\Attribute $source */
           foreach ((array) $sources as &$source) {
             $source->setAttribute('data-srcset', $source['srcset']->value());
-            $source->setAttribute('srcset', '');
+            $source->setAttribute('srcset', Placeholder::BLANK);
           }
         }