public static function InlineParagraphsWidget::addMoreAjax in Paragraphs 8

Ajax callback for the "Add another item" button.

This returns the new page content to replace the page content made obsolete by the form submission.

Overrides WidgetBase::addMoreAjax

File

src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php, line 1140

Class

InlineParagraphsWidget

Plugin implementation of the 'entity_reference paragraphs' widget.

Namespace

Drupal\paragraphs\Plugin\Field\FieldWidget

Code

public static function addMoreAjax(array $form, FormStateInterface $form_state) {
  $button = $form_state
    ->getTriggeringElement();

  // Go one level up in the form, to the widgets container.
  $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -2));

  // Add a DIV around the delta receiving the Ajax effect.
  $delta = $element['#max_delta'];
  $element[$delta]['#prefix'] = '<div class="ajax-new-content">' . (isset($element[$delta]['#prefix']) ? $element[$delta]['#prefix'] : '');
  $element[$delta]['#suffix'] = (isset($element[$delta]['#suffix']) ? $element[$delta]['#suffix'] : '') . '</div>';
  return $element;
}