Symfony outputs js and css files. Why does it report an error?

Thank you !!!

Thank you !!!

Reply content:

Thank you !!!

To use "javascripts" and "stylesheets", you need to use Composer to install a Symfony official Bundle, which is called Assetic. (After version 2.8, the default framework does not install this Bundle. You need to install it on your own ):

$ Composer require symfony/assetic-bundle

Then enable the Bundle in AppKernel. php:

// App/AppKernel. php //... class AppKernel extends Kernel {//... public function registerBundles () {$ bundles = array (//... new Symfony \ Bundle \ AsseticBundle (),);//...}}

Finally, make some necessary configurations:

# App/config. ymlassetic: debug: '% kernel. debug %' use_controller: '% kernel. debug %' filters: cssrewrite :~ #...