webpack.config.js

const path = require('path');
const ExtractTextPlugin = require("extract-text-webpack-plugin");

const extractSass = new ExtractTextPlugin({
    filename: "[name].[contenthash].css",
    disable: process.env.NODE_ENV === "development"
});

module.exports = {
  entry: './src/script.js',
  devtool: 'source-map',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            { loader: 'css-loader', options: { minimize: true } },
            { loader: 'sass-loader', options: { minimize: true } }
        ]
        })
      },
      {
        use: {
          loader:'babel-loader',
          options: { presets: ['es2015'] }
        },
        test: /\.js$/,
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('style.css')
  ],
  resolve: {
    alias: {
      'vue': 'vue/dist/vue.min.js',
    }
  },
}