webpack.config.js

const Encore = require("@symfony/webpack-encore");

// Manually configure the runtime environment if not already configured yet by the "encore" command.
// It's useful when you use tools that rely on webpack.config.js file.
if (!Encore.isRuntimeEnvironmentConfigured())
{
    Encore.configureRuntimeEnvironment(process.env.NODE_ENV || "dev");
}

Encore
    // directory where compiled assets will be stored
    .setOutputPath('public/assets/')
    // public path used by the web server to access the output path
    .setPublicPath('/assets')

    // assets to build
    .addStyleEntry("style", "./assets/css/app.scss")

    /*
     * FEATURE CONFIG
     *
     * Enable & configure other features below. For a full
     * list of features, see:
     * https://symfony.com/doc/current/frontend.html#adding-more-features
     */
    .disableSingleRuntimeChunk()
    .cleanupOutputBeforeBuild()
    .enableBuildNotifications()
    .enableSourceMaps(!Encore.isProduction())
    // enables hashed filenames (e.g. app.abc123.css)
    .enableVersioning(Encore.isProduction())

    // enables Sass/SCSS support
    .enableSassLoader()

;

module.exports = Encore.getWebpackConfig();