Issue #1836860 by attiks, durgesh_singh, Jelle_S, nod_, vks7056, Wim Leers: Picture doesn't work with AJAX callback

core/modules/responsive_image/js/responsive_image.ajax.js

@@ -0,0 +1,16 @@
+(function (Drupal) {
+
+  "use strict";
+
+  /**
+   * Call picturefill so newly added responsive images are processed.
+   */
+  Drupal.behaviors.responsiveImageAJAX = {
+    attach: function () {
+      if (window.picturefill) {
+        window.picturefill();
+      }
+    }
+  };
+
+})(Drupal);

core/modules/responsive_image/responsive_image.libraries.yml

@@ -0,0 +1,4 @@
+ajax:
+  version: VERSION
+  js:
+    js/responsive_image.ajax.js: {}

core/modules/responsive_image/responsive_image.module

@@ -475,3 +475,14 @@ function _responsive_image_image_style_url($style_name, $path) {
   }
   return file_create_url($path);
 }
+
+/**
+ * Implements hook_library_info_alter().
+ *
+ * Load responsive_image.js whenever ajax is added.
+ */
+function responsive_image_library_info_alter(array &$libraries, $module) {
+  if ($module === 'core' && isset($libraries['drupal.ajax'])) {
+    $libraries['drupal.ajax']['dependencies'][] = 'responsive_image/ajax';
+  }
+}