add light/yii2-layer
to composer.json
$ composer install
or
$ composer require light/yii2-layer=*
in view:
use light\assets\LayerAsset;
LayerAsset::register($this);
and for mobile, you can do like this:
use light\asset\LayerMobielAsset;
LaryerMobileAsset::regiter($this);
TBD