WordPress Webpack Config based on Encore

webpack.config.js

var 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('assets/dist')

    // public path used by the web server to access the output path
    .setPublicPath( '/wp-content/themes/stirling/assets/dist/' )

    // only needed for CDN's or sub-directory deploy
    .setManifestKeyPrefix('')

    /*
     * 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( 'stirling', './assets/src/js/stirling.js')
	.addEntry( 'skip-link-focus', './assets/src/js/skip-link-focus-fix.js')
	.addEntry( 'print-friendly', './assets/src/js/print-friendly.js')
	.addEntry( 'pigeon', './assets/src/js/pigeon.js')

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

    // will not require an extra script tag for runtime.js
    .disableSingleRuntimeChunk()

    /*
     * 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
    .configureBabel( () => {}, {
        useBuiltIns: 'entry',
        corejs: 3
    } )

    // enables Sass/SCSS support
    .enableSassLoader()
;

module.exports = Encore.getWebpackConfig();