How to use the @symfony/webpack-encore.isProduction function in @symfony/webpack-encore

* 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('page1', './assets/js/page1.js')
    //.addEntry('page2', './assets/js/page2.js')

    // will require an extra script tag for runtime.js
    // but, you probably want this, unless you're building a single-page app
    .enableSingleRuntimeChunk()

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

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

    // uncomment if you use Sass/SCSS files
    //.enableSassLoader()

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

module.exports = Encore.getWebpackConfig();

.configureBabel(() => {}, {
        useBuiltIns: 'usage',
        corejs: 3
    })

    // load vue components
    .enableVueLoader()

    // Enable sourcemaps in production mode
    .enableSourceMaps(!Encore.isProduction())

    // empty the outputPath dir before each build
    .cleanupOutputBeforeBuild()

    // versioning to avoid browser cache loading old assets
    .enableVersioning(Encore.isProduction())

    // We don't need a runtime.js for unite cms at the moment
    .disableSingleRuntimeChunk();

// export the final configuration
module.exports = Encore.getWebpackConfig();

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

Encore
    // the project directory where compiled assets will be stored
    .setOutputPath('public/build/')
    // the public path used by the web server to access the previous directory
    .setPublicPath('/build')
    .cleanupOutputBeforeBuild()
    .enableSourceMaps(!Encore.isProduction())
    // uncomment to create hashed filenames (e.g. app.abc123.css)
    // .enableVersioning(Encore.isProduction())

    // uncomment to define the assets of the project
    // .addEntry('js/app', './assets/js/app.js')
    .addEntry('js/app', './assets/js/app.js')
    .addEntry('js/app_security_forms', './assets/js/app_security_forms.js')
    // .addStyleEntry('css/app', './assets/css/app.scss')
    .addStyleEntry('css/app', './assets/css/app.scss')
    // uncomment if you use Sass/SCSS files
    // .enableSassLoader()
    .enableSassLoader()

    // uncomment for legacy applications that require $/jQuery as a global variable
    .autoProvidejQuery()
;

// will require an extra script tag for runtime.js
    // but, you probably want this, unless you're building a single-page app
    .enableSingleRuntimeChunk()

    // allow legacy applications to use $/jQuery as a global variable
    .autoProvidejQuery()

    // enable source maps during development
    .enableSourceMaps(!Encore.isProduction())

    // empty the outputPath dir before each build
    .cleanupOutputBeforeBuild()

    // show OS notifications when builds finish/fail
    .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;
    })

    // allow sass/scss files to be processed
    .enableSassLoader()

    // Enable React processing
    //.enableReactPreset()

    .copyFiles({

.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
    })

    .enableVueLoader()

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

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

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

Encore
  .setOutputPath('public/builds/')
  .setPublicPath('/builds')
    .disableSingleRuntimeChunk()
  // this will be your app!
  .addEntry('app', './assets/js/app.js')
  .autoProvidejQuery()
  .enableSourceMaps(!Encore.isProduction())
  .cleanupOutputBeforeBuild()
  .enableBuildNotifications()
  // You need sass loader!
  .enableSassLoader()
;

module.exports = Encore.getWebpackConfig();

{from: './node_modules/ckeditor/skins', to: 'ckeditor/skins/[path][name].[ext]'},
				{from: './assets/img', to: 'img/[path][name].[ext]'},
				{from: './assets/plugins/ckeditor', to: 'ckeditor/plugins/[path][name].[ext]'},
		])
    /*
     * 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
    })

		.enablePostCssLoader()

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

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

    // uncomment to get integrity="..." attributes on your script & link tags

.addLoader({
        test: /bootstrap\.native/,
        use: {
            loader: 'bootstrap.native-loader',
            options: {
                only: [
                    'collapse',
                    'dropdown',
                ],
            },
        },
    })
    .disableSingleRuntimeChunk()
    .enableSassLoader()
    .enableSourceMaps(!Encore.isProduction())
    .enableVersioning(Encore.isProduction())
;

module.exports = Encore.getWebpackConfig();