webpack.config.js

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

// 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/build/')
    // public path used by the web server to access the output path
    .setPublicPath('/build')
    // only needed for CDN's or sub-directory deploy
    //.setManifestKeyPrefix('build/')

    /*
     * ENTRY CONFIG
     *
     * Add 1 entry for each "page" of your app
     * (including one that's included on every page - e.g. "app")
     *
     * Each entry will result in one JavaScript file (e.g. app.js)
     * and one CSS file (e.g. app.css) if your JavaScript imports CSS.
     */
    .addEntry('app', './assets/js/app.js')
    // .addEntry('vue-router', './assets/js/router')
    //.addEntry('page1', './assets/js/page1.js')
    //.addEntry('page2', './assets/js/page2.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()

    .addAliases({
        '@': path.resolve(__dirname, 'assets', 'js'),
        styles: path.resolve(__dirname, 'assets', '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
     */
    .cleanupOutputBeforeBuild()
    .enableBuildNotifications()
    .enableSourceMaps(!Encore.isProduction())
    // enables hashed filenames (e.g. app.abc123.css)
    .enableVersioning(Encore.isProduction())

    // enables @babel/preset-env polyfills
    .configureBabelPresetEnv((config) => {
        config.useBuiltIns = 'usage';
        config.corejs = 3;
    })

    .copyFiles({
        from: './assets/images',
        to: Encore.isProduction()
            ? 'images/[path][name].[hash:8].[ext]'
            : 'images/[path][name].[ext]',
    })

    // enables Sass/SCSS support
    .enableSassLoader()
    // Enable .vue file processing
    .enableVueLoader()

    .configureCssLoader((config) => {
        if (!Encore.isProduction() && config.modules) {
            config.modules.localIdentName = '[name]_[local]_[hash:base64:5]';
        }
    })

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

// uncomment to get integrity="..." attributes on your script & link tags
// requires WebpackEncoreBundle 1.4 or higher
//.enableIntegrityHashes(Encore.isProduction())

// uncomment if you're having problems with a jQuery plugin
//.autoProvidejQuery()

// uncomment if you use API Platform Admin (composer req api-admin)
//.enableReactPreset()
//.addEntry('admin', './assets/js/admin.js')
;

if (!Encore.isProduction()) {
    Encore.disableCssExtraction();
}

module.exports = Encore.getWebpackConfig();