dokuwiki\Form\DropdownElement::mainElementHTML PHP Метод

    protected function mainElementHTML()
    {
        if ($this->useInput) {
            $this->prefillInput();
        }
        $html = '<select ' . buildAttributes($this->attrs()) . '>';
        $html = array_reduce($this->optGroups, function ($html, OptGroup $optGroup) {
            return $html . $optGroup->toHTML();
        }, $html);
        $html .= '</select>';
        return $html;
    }