submitExposed example

  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Form input keys that will not be included in $view->exposed_raw_data.     $exclude = ['submit', 'form_build_id', 'form_id', 'form_token', 'exposed_form_plugin', 'reset'];
    $values = $form_state->getValues();
    foreach (['field', 'filter'] as $type) {
      /** @var \Drupal\views\Plugin\views\ViewsHandlerInterface[] $handlers */
      $handlers = &$form_state->get('view')->$type;
      foreach ($handlers as $key => $info) {
        if ($handlers[$key]->acceptExposedInput($values)) {
          $handlers[$key]->submitExposed($form, $form_state);
        }
        else {
          // The input from the form did not validate, exclude it from the           // stored raw data.           $exclude[] = $key;
        }
      }
    }

    $view = $form_state->get('view');
    $view->exposed_data = $values;