Webpack 1 sample config

webpack.config.js

'use strict'

var path = require('path');
const webpack = require('webpack');
const NODE_ENV = process.env.NODE_ENV || 'development';
//const NODE_ENV = 'production';

module.exports = {
  context: __dirname + "/frontend",
  entry: {
      home: "./home",
      about: "./about",
      common: ["./common", "./welcome"]
  },

  output: {
    path: __dirname + "/public",
    filename: '[name].js',
    library: '[name]'
  },

  watch: NODE_ENV === 'development',
  watchOptions: {
    aggregateTimeout: 100
  },

  devtool: NODE_ENV == 'development' ? "cheap-inline-module-source-map" : null,

  plugins: [
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin({
      NODE_ENV: JSON.stringify(NODE_ENV),
      LANG: '"ru"'
    }),
      new webpack.optimize.CommonsChunkPlugin({
          name: "common"
      })
  ],

  module: {
    loaders: [{
      test: /\.js$/,
      loader: 'babel?optional[]=runtime'
    }]

  }
};

if (NODE_ENV === 'production') {
  module.exports.plugins.push(
      new webpack.optimize.UglifyJsPlugin({
          compress: {
            warnings: false,
            drop_console: true,
            unsafe: true
          }
      })
  );
}