webpack.config.js

const path = require('path');
const glob = require('glob');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const VueLoaderPlugin = require('vue-loader/lib/plugin');


const css_loaders = [
  {
    loader: 'css-loader?sourceMap'
  },
  {
    loader: 'postcss-loader?sourceMap'
  },
  {
    loader: 'sass-loader?sourceMap'
  }
];


module.exports = (env, options) => ({
  optimization: {
    minimizer: [
      new UglifyJsPlugin({ cache: true, parallel: true, sourceMap: false }),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  entry: {
      './js/app.js': ['./js/app.js', './css/app.scss'].concat(glob.sync('./vendor/**/*.js'))
  },
  output: {
    filename: 'app.js',
    path: path.resolve(__dirname, '../priv/static/js')
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
       test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.(scss|sass|css)$/i,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader",
          "resolve-url-loader",
          "sass-loader"
        ]
      },
      {
        test: /\.(jpe?g|png|gif|woff|woff2|eot|ttf|svg)(\?[a-z0-9=.]+)?$/,
        loader: 'url-loader?limit=100000' 
      }
    ]
  },
  resolve: {
    alias: {
      'vue$': 'vue/dist/vue.esm.js'
    },
    extensions: ['*', '.js', '.vue', '.json']
  },
  plugins: [
    new MiniCssExtractPlugin({ filename: 'css/app.css' }),
    new CopyWebpackPlugin([{ from: 'static/', to: '../' }]),
    new VueLoaderPlugin(),
  ]
});