webpack.config.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');

// Is the current build a development build
const IS_DEV = process.env.NODE_ENV === 'dev';

const dirNode = 'node_modules';
const dirApp = path.join(__dirname, 'app');
const dirAssets = path.join(__dirname, 'assets');

const appHtmlTitle = 'Webpack Boilerplate';

/**
 * Webpack Configuration
 */
module.exports = {
  entry: {
    // vendor: [
    //   'lodash'
    // ],
    bundle: path.join(dirApp, 'index'),
  },
  resolve: {
    modules: [dirNode, dirApp, dirAssets],
  },
  plugins: [
    new webpack.DefinePlugin({
      IS_DEV,
    }),

    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'index.ejs'),
      title: appHtmlTitle,
    }),
  ],
  module: {
    rules: [
      // BABEL
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /(node_modules)/,
        options: {
          compact: true,
        },
      },

      // STYLES
      {
        test: /\.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              sourceMap: IS_DEV,
            },
          },
        ],
      },

      // CSS / SASS
      {
        test: /\.scss/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              sourceMap: IS_DEV,
            },
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: IS_DEV,
              includePaths: [dirAssets],
            },
          },
        ],
      },

      // IMAGES
      {
        test: /\.(jpe?g|png|gif)$/,
        loader: 'file-loader',
        options: {
          name: '[path][name].[ext]',
        },
      },
    ],
  },
};