Souke/backend/assets/AppAsset.php

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace backend\assets;

use yii\web\AssetBundle;
use yii ;

/**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class AppAsset extends AssetBundle
{
    public $basePath = '@webroot';
    public $baseUrl = '@web';
    public $css = [];
    public $js = [];
    public $depends = [
        'yii\bootstrap\BootstrapAsset',
        'yii\web\YiiAsset',
    ];
    
    public function __construct() {
        parent::__construct() ;
        
        // css
        $this->css[] = 'js/jquery-ui-1.12.1.custom/jquery-ui.min.css?v='.filemtime(Yii::getAlias('@app/web/js/jquery-ui-1.12.1.custom/jquery-ui.min.css')) ;
        $this->css[] = 'js/jquery-ui-1.12.1.custom/jquery-ui.theme.min.css?v='.filemtime(Yii::getAlias('@app/web/js/jquery-ui-1.12.1.custom/jquery-ui.theme.min.css')) ;
        $this->css[] = 'css/site.css?v='.filemtime(Yii::getAlias('@app/web/css/site.css')) ;
        $this->css[] = 'css/screen.css?v='.filemtime(Yii::getAlias('@app/web/css/screen.css')) ;
        
        // js
        $this->js[] = 'js/jquery-ui-1.12.1.custom/jquery-ui.min.js?v='.filemtime(Yii::getAlias('@app/web/js/jquery-ui-1.12.1.custom/jquery-ui.min.js')) ;
        $this->js[] = 'js/lechatdesnoisettes.js?v='.filemtime(Yii::getAlias('@app/web/js/lechatdesnoisettes.js')) ; 
    }
}