kartik\export\ExportMenu::registerAssets PHP Method

    protected function registerAssets()
    {
        $view = $this->getView();
        Dialog::widget($this->krajeeDialogSettings);
        ExportMenuAsset::register($view);
        $this->messages += ['allowPopups' => Yii::t('kvexport', 'Disable any popup blockers in your browser to ensure proper download.'), 'confirmDownload' => Yii::t('kvexport', 'Ok to proceed?'), 'downloadProgress' => Yii::t('kvexport', 'Generating the export file. Please wait...'), 'downloadComplete' => Yii::t('kvexport', 'Request submitted! You may safely close this dialog after saving your downloaded file.')];
        $formId = $this->exportFormOptions['id'];
        $options = Json::encode(['formId' => $formId, 'messages' => $this->messages, 'dialogLib' => new JsExpression(ArrayHelper::getValue($this->krajeeDialogSettings, 'libName', 'krajeeDialog'))]);
        $menu = 'kvexpmenu_' . hash('crc32', $options);
        $view->registerJs("var {$menu} = {$options};\n", View::POS_HEAD);
        $script = "";
        foreach ($this->exportConfig as $format => $setting) {
            if (empty($setting) || $setting === false) {
                continue;
            }
            $id = $this->options['id'] . '-' . strtolower($format);
            $options = ['settings' => new JsExpression($menu), 'alertMsg' => $setting['alertMsg'], 'target' => $this->target, 'showConfirmAlert' => $this->showConfirmAlert];
            if ($this->_columnSelectorEnabled) {
                $options['columnSelectorId'] = $this->columnSelectorOptions['id'];
            }
            $options = Json::encode($options);
            $script .= "jQuery('#{$id}').exportdata({$options});\n";
        }
        if ($this->_columnSelectorEnabled) {
            $id = $this->columnSelectorMenuOptions['id'];
            ExportColumnAsset::register($view);
            $script .= "jQuery('#{$id}').exportcolumns({});\n";
        }
        if (!empty($script) && isset($this->pjaxContainerId)) {
            $script .= "jQuery('#{$this->pjaxContainerId}').on('pjax:complete', function() {\n                {$script}\n            });\n";
        }
        $view->registerJs($script);
    }