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/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/')
    .copyFiles({
        from: './assets/images',

        // optional target path, relative to the output dir
        // to: 'images/[path][name].[ext]',

        // if versioning is enabled, add the file hash too
        to: 'images/[path][name].[hash:8].[ext]',

        // only copy files matching this pattern
        // pattern: /\.(png|jpg|jpeg)$/
    })
    /*
     * ENTRY CONFIG
     *
     * 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/app.js')
    
    .addStyleEntry('home', './assets/styles/app.scss')

    // enables the Symfony UX Stimulus bridge (used in assets/bootstrap.js)
    .enableStimulusBridge('./assets/controllers.json')

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

    .configureBabel((config) => {
        config.plugins.push('@babel/plugin-proposal-class-properties');
    })

    // enables @babel/preset-env polyfills
    .configureBabelPresetEnv((config) => {
        config.useBuiltIns = 'usage';
        config.corejs = 3;
    })
    // uncomment if you use TypeScript
    // .enableTypeScriptLoader()

// uncomment if you use React
// .enableReactPreset()

// 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()

    // enables Sass/SCSS support
    .enableSassLoader();
const fullConfig = Encore.getWebpackConfig();
fullConfig.devServer = {
    headers: {
        'Access-Control-Allow-Origin': '*',
        'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, PATCH, OPTIONS',
        'Access-Control-Allow-Headers': 'X-Requested-With, content-type, Authorization'
    },
    watchFiles: {
        paths: ['templates/**/*.html.twig']
    }
};
module.exports = fullConfig;