webpack.config.js

var webpack = require('webpack');
var path = require('path');

var config = {
  context: __dirname + '/src',
  // the entry point of your library
  entry: {
    koto: './chart.js'
  },
  // where 3rd-party modules can reside
  resolve: {
    modulesDirectories: ['node_modules', 'bower_components']
  },

  output: {
    // where to put standalone build file
    path: path.join(__dirname, 'dist'),
    publicPath: '/dist/',
    // the name of the standalone build file
    filename: 'chart.js',
    // the standalone build should be wrapped in UMD for interop
    libraryTarget: 'umd',
    // the name of your library in global scope
    library: 'KotoBarChart'
  },
  externals: {
    // Specify all libraries a user need to have in his app,
    // but which can be loaded externally, e.g. from CDN
    // or included separately with a <script> tag
    'koto': {
      root: 'Koto',
      commonjs: 'koto',
      commonjs2: 'koto',
      amd: 'koto'
    },
    'd3': 'd3'
  },

  plugins: [
    new webpack.DefinePlugin({
      ON_DEV: process.env.NODE_ENV === 'development' || !process.env.NODE_ENV,
      ON_TEST: process.env.NODE_ENV === 'test',
      ON_PROD: process.env.NODE_ENV === 'production'
    })
  ],

  module: {
    loaders: [{
      test: /\.js$/,
      loader: 'babel?stage=1&optional=runtime&loose=all',
      exclude: /(node_modules|bower_components)/
    }]
  },

  devtool: 'source-map',

  devServer: {
    contentBase: '',
    noInfo: false, //  --no-info option
    hot: true,
    inline: true
  }
};

if (process.env.NODE_ENV === 'production') {
  config.plugins.push(new webpack.optimize.UglifyJsPlugin());
}

module.exports = config;