[Wiki] How to use Yii2-excelview

php composer.phar require --prefer-dist arturoliveira/yii2-excelview "*"

"arturoliveira/yii2-excelview": "*"

'modules' => [//add by Scott
        'gridview' => [
            'class' => '\kartik\grid\Module'
        // enter optional module parameters below - only if you need to  
        // use your own export download action or custom translation 
        // message source
        // 'downloadAction' => 'gridview/export/download',
        // 'i18n' => []
        ],
...

use arturoliveira\ExcelView;
    public function actionExport() {
        $searchModel = new CountrySearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
        ExcelView::widget([
            'dataProvider' => $dataProvider,
            'filterModel' => $searchModel,
            'fullExportType'=> 'xlsx', //can change to html,xls,csv and so on
            'grid_mode' => 'export',
            'columns' => [
                ['class' => 'yii\grid\SerialColumn'],
                'code',
                'name',
                'population',
              ],
        ]);
    }