D8_rplf/modules/colorbox_load/src/OpenCommand.php

<?php

/**
 * @file
 * Contains \Drupal\colorbox_load\OpenCommand.
 */

namespace Drupal\colorbox_load;

use Drupal\Core\Ajax\CommandInterface;

/**
 * Defines an AJAX command to open content in a colorbox.
 */
class OpenCommand implements CommandInterface {

  /**
   * The content for the colorbox.
   *
   * @var string
   */
  protected $content;

  /**
   * Constructs an OpenCommand object.
   *
   * @param string $content
   *   The content that will be placed in the colorbox.
   */
  public function __construct($content) {
    $this->content = $content;
  }

  /**
   * {@inheritdoc{
   */
  public function render() {
    return [
      'command' => 'colorboxLoadOpen',
      'data' => $this->content,
    ];
  }

}