webpack.config.js

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

Encore
    // the project directory where compiled assets will be stored
    .setOutputPath('public/build/')
    // the public path used by the web server to access the previous directory
    .setPublicPath('/public/build')
    // will require an extra script tag for runtime.js
    // but, you probably want this, unless you're building a single-page app
    .enableSingleRuntimeChunk()

    .cleanupOutputBeforeBuild()
    .enableSourceMaps(!Encore.isProduction())
    // enables hashed filenames (e.g. app.abc123.css)
    .enableVersioning(Encore.isProduction())

    // uncomment to define the assets of the project
    .addEntry('js/app', './assets/js/index.js')
    .addStyleEntry('css/app', './assets/scss/global.scss')

    // uncomment if you use Sass/SCSS files
    .enableSassLoader()
    // uncomment for legacy applications that require $/jQuery as a global variable
    .autoProvidejQuery()
    .enableTypeScriptLoader()
    .enableReactPreset()
    .enableBuildNotifications()
;
module.exports = Encore.getWebpackConfig();