Messages.php

<?php

namespace Drupal\views\Plugin\views\area;


/**
 * Provides an area for messages.
 *
 * @ingroup views_area_handlers
 *
 * @ViewsArea("messages")
 */
class Messages extends AreaPluginBase {
    
    /**
     * {@inheritdoc}
     */
    protected function defineOptions() {
        $options = parent::defineOptions();
        // Set the default to TRUE so it shows on empty pages by default.
        $options['empty']['default'] = TRUE;
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function render($empty = FALSE) {
        if (!$empty || !empty($this->options['empty'])) {
            return [
                '#type' => 'status_messages',
            ];
        }
        return [];
    }

}