Method __construct

public function __construct()
{
    $app = Factory::getApplication();
    if ($app->isClient('administrator')) {
        HTMLHelper::_('jquery.framework', false);
        HTMLHelper::_('script', 'media/com_phocacart/js/chartjs/Chart.min.js', array('version' => 'auto'), array('defer' => true));
    } else {
        $media = PhocacartRenderMedia::getInstance('main');
        $media->renderChartJs();
    }
}