webpack.common.js

const path = require('path');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  entry: [
    './src/index.js',
    './src/assets/stylesheet/main.scss',
  ],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'js/main.js',
    publicPath: '/'
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: ['babel-loader'],
        exclude: /node_modules/,
      },
      {
        test: /\.scss$/,
        use: ['css-hot-loader'].concat(ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'postcss-loader', 'sass-loader'],
        })),
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(eot|svg|otf|ttf|woff|woff2)$/,
        use: ['file-loader'],
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: ['file-loader'],
      },
    ]
  },
  plugins: [
    new CleanWebpackPlugin(['dist'], {
      verbose: true,
      dry: false,
    }),
    new ExtractTextPlugin({
      filename: 'css/main.css'
    }),
    new HtmlWebpackPlugin({
      template: './src/index.html',
      minify: {
        collapseWhitespace: true,
        minifyCSS: true,
        minifyJS: true,
      },
    }),
  ]
};