Encore\Admin\Form\Field\Json::render PHP Метод

    public function render()
    {
        $this->script = <<<EOT

var editor = CodeMirror.fromTextArea(document.getElementById("{$this->id}"), {
    lineNumbers: true,
    mode: "application/ld+json",
    lineWrapping: true,
    matchBrackets: true,
    autoCloseBrackets: true,
});

EOT;
        return parent::render();
    }