webpack.config.js

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

Encore
    .setOutputPath('public/build/')
    .setPublicPath('/build')

    .addEntry('app', './assets/js/app.js')

    // When enabled, Webpack "splits" your files into smaller pieces for greater optimization.
    .splitEntryChunks()

    // will require an extra script tag for runtime.js
    // but, you probably want this, unless you're building a single-page app
    .enableSingleRuntimeChunk()

    /*
     * FEATURE CONFIG
     *
     * Enable & configure other features below. For a full
     * list of features, see:
     * https://symfony.com/doc/current/frontend.html#adding-more-features
     */
    .cleanupOutputBeforeBuild()
    //.enableBuildNotifications()
    .enableSourceMaps(!Encore.isProduction())
    .enableVersioning(true)
    .configureBabel(() => {}, {
        useBuiltIns: 'usage',
        corejs: 3
    })

    .enableSassLoader()
    .enableIntegrityHashes()

    // uncomment if you use TypeScript
    //.enableTypeScriptLoader()
    .enableVueLoader()
;

module.exports = Encore.getWebpackConfig();