function AjaxAddRemoveElements::addOne

Same name and namespace in other branches
  1. 4.0.x modules/form_api_example/src/Form/AjaxAddRemoveElements.php \Drupal\form_api_example\Form\AjaxAddRemoveElements::addOne()

Submit handler for the "add-one-more" button.

Increments the max counter and causes a rebuild.

File

modules/form_api_example/src/Form/AjaxAddRemoveElements.php, line 131

Class

AjaxAddRemoveElements
Example ajax add remove buttons.

Namespace

Drupal\form_api_example\Form

Code

public function addOne(array &$form, FormStateInterface $form_state) {
    $num_field = $form_state->get('num_lines');
    $add_button = $num_field + 1;
    $form_state->set('num_lines', $add_button);
    $form_state->setRebuild();
}