webpack.config.js

const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const inProduction = process.env.NODE_ENV === 'production';

module.exports = {
  mode: process.env.NODE_ENV || 'development',
  optimization: {
    minimize: inProduction
  },
  entry: {
    app: ['./src/main.js', './src/main.scss']
  },
  output: {
    path: __dirname + '/dist',
    filename: '[name].js'
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/,
        use: ExtractTextPlugin.extract({
          use: ['css-loader', 'sass-loader'],
          fallback: 'style-loader'
        })
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader'
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf|svg)$/,
        use: ['file-loader']
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('[name].css'),
    new webpack.LoaderOptionsPlugin({
      minimize: inProduction
    })
  ]
};