Webpack configuration

Webpack configuration for CSS, Images, Svg font is devided by JS Comment // Frontend Config

Config file content description

const generateWebFont = require('./assets/js/commands/svg/generateWebFont'); - plugin for generating SVG font from optimized SVG files

yaml = require('js-yaml'); - plugin for loading yaml files to usable array

fs = require('fs'); - plugin for file system functions (saving files)

const StylelintPlugin = require('stylelint-webpack-plugin'); - plugin for coding standards in less files (see also StyleLint Settings)

const domainFile = './config/domains.yaml';
const domains = yaml.safeLoad(fs.readFileSync(domainFile, 'utf8'));

domains.domains.forEach((domain) => {
    if (!domain.styles_directory) {
        domain.styles_directory = 'common';
        .addEntry('frontend-style-' + domain.styles_directory, './assets/styles/frontend/' + domain.styles_directory + '/main.less')
        .addEntry('frontend-print-style-' + domain.styles_directory, './assets/styles/frontend/' + domain.styles_directory + '/print/main.less');

We can specify different design for each domain. This is specified by styles_directory value in ./config/domains.yaml file. By default we have common and domain2. For all these folders we need to create .addEntry for style and for print style. These entries are loaded in base.html.twig by:

{% set entryDirectory = 'frontend-style-' ~ getDomain().currentDomainConfig.stylesDirectory %}
{{ encore_entry_link_tags( entryDirectory ) }}

Encore configuration description

    .addPlugin(new EventHooksPlugin({
        beforeRun: () => {

This part generates svg webfonts for admin and frontend. It uses local function generateWebFont = require('./assets/js/commands/svg/generateWebFont'). Lets look inside this function.

function generateWebFont (type, svgSourceFolder) {

    optimizeSvg(svgSourceFolder).then(svgFilesPath => {
            files: svgFilesPath,
            dest: 'assets/public/' + type + '/fonts',
            cssDest: 'assets/public/' + type + '_svg.less',
            cssFontsUrl: type + '/fonts',
            fontName: 'svg',
            fontHeight: '512',
            fixedWidth: '512',
            centerHorizontally: true,
            normalize: true,
            html: true,
            htmlDest: 'docs/generated/webfont-' + type + '-svg.html',
            templateOptions: {
                baseSelector: '.svg',
                classPrefix: 'svg-'
        }, function (error) {
            if (error) {
                console.log(type + ' SVG Fail!', error);
            } else {
                console.log(type + ' SVG generated!');

This function configures generating SVG font from optimized svg files. Files in this folders are optimized by optimizeSvg functions which returns array of files. This array is sent to WebfontsGenerator as svgFilesPath to apply this plugin for all svg files.

function optimizeSvg (svgSourceFolder) {
    return new Promise((resolve, reject) => {
        return glob(svgSourceFolder, null, (err, svgFiles) => {
            if (err) {

            svgFiles.forEach(svgFile => {
                fs.readFile(svgFile, 'utf8', function (err, data) {
                    if (err) {
                        throw err;
                    svgo.optimize(data, { path: svgFile }).then(function (result) {
                        fs.writeFile(svgFile, result.data, function (err) {
                            if (err) {
                                console.log('ERROR: SVG icon ' + svgFile + ' optimize failed');
                                throw err;


This part loads all svg files from svgSourceFolder and aplies svgo.optimize function and saves new file.

    .addEntry('admin-style', './assets/styles/admin/main.less')
        new StylelintPlugin({
            configFile: '.stylelintrc',
            files: 'assets/styles/**/*.less'

This part creates entry for admin file - generates admin css file from specified main.less and aplies stylelint rules for all frontend less files.

        test   : /\.(ttf|eot|svg|woff(2)?)(\?[a-z0-9=&.]+)?$/,
        loader : 'file-loader'

This part adds loader for font files - it is necessary for font files. .enableLessLoader() init for convert less files to css files.

.enablePostCssLoader() - this will apply all rules from postcss.config.js file in root of project-base. By default there is set autoprefixer for last 3 versions browsers.