dosamigos\datepicker\DateRangePicker::registerClientScript PHP Method

    public function registerClientScript()
    {
        $js = [];
        $view = $this->getView();
        // @codeCoverageIgnoreStart
        if ($this->language !== null) {
            $this->clientOptions['language'] = $this->language;
            DatePickerLanguageAsset::register($view)->js[] = 'bootstrap-datepicker.' . $this->language . '.min.js';
        } else {
            DateRangePickerAsset::register($view);
        }
        // @codeCoverageIgnoreEnd
        $id = $this->options['id'];
        $selector = ";jQuery('#{$id}').parent()";
        if ($this->form && $this->hasModel()) {
            // @codeCoverageIgnoreStart
            $selector .= '.parent()';
            $class = "field-" . Html::getInputId($this->model, $this->attribute);
            $js[] = "{$selector}.closest('.{$class}').removeClass('{$class}');";
            // @codeCoverageIgnoreEnd
        }
        $options = !empty($this->clientOptions) ? Json::encode($this->clientOptions) : '';
        $js[] = "{$selector}.datepicker({$options});";
        // @codeCoverageIgnoreStart
        if (!empty($this->clientEvents)) {
            foreach ($this->clientEvents as $event => $handler) {
                $js[] = "{$selector}.on('{$event}', {$handler});";
            }
        }
        // @codeCoverageIgnoreEnd
        $view->registerJs(implode("\n", $js));
    }