Replace Mix with Encore

webpack.config.js

@@ -0,0 +1,25 @@
+const Encore = require('@symfony/webpack-encore')
+const glob = require('glob-all')
+const PurgecssPlugin = require('purgecss-webpack-plugin')
+
+Encore
+  .disableSingleRuntimeChunk()
+  .cleanupOutputBeforeBuild()
+  .setOutputPath('source/build/')
+  .setPublicPath('/build')
+  .addEntry('app', './assets/js/app.js')
+  .enablePostCssLoader()
+  .enableVueLoader()
+  .enableSourceMaps(!Encore.isProduction())
+
+if (Encore.isProduction()) {
+  Encore.addPlugin(new PurgecssPlugin({
+    defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || [],
+    paths: () => glob.sync([
+      'assets/**/*.vue',
+      'source/**/*.{md,twig}'
+    ])
+  }))
+}
+
+module.exports = Encore.getWebpackConfig()