webpack.config.js

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

Encore
// directory where compiled assets will be stored
    .setOutputPath('public/build/')
    .copyFiles({
        from: './assets/img',

        // 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)$/
    })
    // 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 you JavaScript imports CSS.
     */
    .addEntry('app', './assets/js/app.js')
    .addEntry('bookForm', './assets/js/bookForm.js')
    .addEntry('booksTable', './assets/js/booksTable.js')
    .addEntry('dashboard', './assets/js/dashboard.js')
    .addEntry('adminProfile', './assets/js/admin_profile.js')
    .addEntry('search', './assets/js/search.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())
    // enables hashed filenames (e.g. app.abc123.css)
    .enableVersioning(Encore.isProduction())

    // enables @babel/preset-env polyfills
    .configureBabel(() => {
    }, {
        useBuiltIns: 'usage',
        corejs: 3
    })

    // enables Sass/SCSS support
    .enableSassLoader()

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

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

    // 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')
module.exports = Encore.getWebpackConfig();