protected function initClientOptions()
    {
        $options = $this->clientOptions;
        foreach ($options as $key => $value) {
            if (
                !$value instanceof JsExpression
                && in_array($key, [
                    'oncomplete', 'onincomplete', 'oncleared', 'onKeyUp', 'onKeyDown', 'onBeforeMask',
                    'onBeforePaste', 'onUnMask', 'isComplete', 'determineActiveMasksetIndex',
                ], true)
            ) {
                $options[$key] = new JsExpression($value);
            }
        }
        $this->clientOptions = $options;
    }