Ticket #41884: 41884.diff

src/wp-content/themes/twentyseventeen/functions.php

@@ -572 +572 @@
  * @return array The filtered attributes for the image markup.
  */
 function twentyseventeen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) {
-        if ( is_archive() || is_search() || is_home() ) {
-                $attr['sizes'] = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px';
-        } else {
-                $attr['sizes'] = '100vw';
-        }
+
+        // Restrict resizing of images in admin section.
+        if ( ! is_admin() ) {
+
+                if ( is_archive() || is_search() || is_home() ) {
+                        $attr['sizes'] = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px';
+                } else {
+                        $attr['sizes'] = '100vw';
+                }
+        } // end: if is_admin condition
 
         return $attr;
 }