Issue #3157747 by amykhailova, mrinalini9: Date filter outputs notice when...

Issue #3157747 by amykhailova, mrinalini9: Date filter outputs notice when jQuery option is selected

src/Plugin/better_exposed_filters/filter/DatePickers.php

@@ -56,12 +56,15 @@ class DatePickers extends FilterWidgetBase {
       if (isset($form[$field_id]['value'])) {
         $format = $form[$field_id]['value']['#date_format'];
         $form[$field_id]['value']['#attributes']['class'][] = 'bef-datepicker';
+        $form[$field_id]['value']['#attributes']['type'] = 'date';
       }
       else {
         // Both min and max share the same format.
         $format = $form[$field_id]['min']['#date_format'];
         $form[$field_id]['min']['#attributes']['class'][] = 'bef-datepicker';
         $form[$field_id]['max']['#attributes']['class'][] = 'bef-datepicker';
+        $form[$field_id]['min']['#attributes']['type'] = 'date';
+        $form[$field_id]['max']['#attributes']['type'] = 'date';
       }
 
       // Convert Date API format to jQuery UI date format.
@@ -80,11 +83,13 @@ class DatePickers extends FilterWidgetBase {
         foreach ($fields as $field) {
           if (isset($form[$field_id][$field])) {
             $form[$field_id][$field]['#attributes']['class'][] = 'bef-datepicker';
+            $form[$field_id][$field]['#attributes']['type'] = 'date';
           }
         }
       }
       else {
         $form[$field_id]['#attributes']['class'][] = 'bef-datepicker';
+        $form[$field_id]['#attributes']['type'] = 'date';
       }
     }
   }