Issue #3117447 by Prashant.c, nader.mouldi: Does not work with #AJAX

src/Element/BootstrapDateTime.php

@@ -27,8 +27,14 @@ class BootstrapDateTime extends Datetime {
       '#element_validate' => [
         [$class, 'validateDatetime'],
       ],
-      '#process' => [[$class, 'processBootstrapDateTime']],
-      '#pre_render' => [[$class, 'preRenderBootstrapDateTime']],
+      '#process' => [
+        [$class, 'processBootstrapDateTime'],
+        [$class, 'processAjaxForm']
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderBootstrapDateTime'],
+        [$class, 'preRenderAjaxForm']
+      ],
       '#multiple' => FALSE,
       '#maxlength' => 512,
       '#size' => 25,
@@ -159,6 +165,11 @@ class BootstrapDateTime extends Datetime {
       $settings['data-bootstrap-date-time'] = $element['#date_type'];
       $element['#date_date_element'] = $element['#date_type'];
     }
+    
+    // Handle #ajax event.
+    if (isset($element['#ajax']) && !isset($element['#ajax']['event'])) {
+      $element['#ajax']['event'] = 'change';
+    }
 
     // Append our attributes to element.
     $element['#attributes'] += $settings;