core/webpack.config.js

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

const WorkboxPlugin = require('workbox-webpack-plugin');

Encore
    // the project directory where all compiled assets will be stored
    .setOutputPath('public/assets/')
    // the public path used by the web server to access the previous directory
    .setPublicPath('/assets')

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

    .autoProvidejQuery()
    .enableVueLoader()

    // TODO: To keep or be removed if not needed
    // filenames include a hash that changes whenever the file contents change
    // .enableVersioning()

    // Workbox should always be the last plugin to add @see: https://developers.google.com/web/tools/workbox/guides/codelabs/webpack#optional-config
    .addPlugin(
        new WorkboxPlugin.GenerateSW({
            // these options encourage the ServiceWorkers to get in there fast
            // and not allow any straggling "old" SWs to hang around
            clientsClaim: true,
            skipWaiting: false,
            importsDirectory: 'sw/',
    }))
;
// export the final configuration

module.exports = Encore.getWebpackConfig();