webpack.config.js

// webpack.config.js
var Encore = require('@symfony/webpack-encore');

Encore
// directory where all compiled assets will be stored
    .setOutputPath('web/build/')

// what's the public path to this directory (relative to your project's document root dir)
.setPublicPath('/build')

// empty the outputPath dir before each build
.cleanupOutputBeforeBuild()

// will output as web/build/app.js
.addEntry('app', './app/Resources/public/js/main.js')

// will output as web/build/global.css
.addStyleEntry('global', './app/Resources/public/css/global.scss')

// allow sass/scss files to be processed
.enableSassLoader()

// allow legacy applications to use $/jQuery as a global variable
.autoProvidejQuery()

.enableSourceMaps(!Encore.isProduction())

// create hashed filenames (e.g. app.abc123.css)
// .enableVersioning()
;

// export the final configuration
module.exports = Encore.getWebpackConfig();