Can't add js and css files to back office

Question

I want to add JS and CSS files to back office in my module. But I get error: Attempted to call an undefined method named \"registerStylesheet\" of class \"AdminModulesController

Answer 1

Try with :

$this->addJs(
     _PS_MODULE_DIR_ .'objet/views/js/feature.js',
     'all'
);
$this->addCss(
      _PS_MODULE_DIR_ .'objet/views/css/feature.css',
      'all'
);

Regards