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new webpack.optimize.UglifyJsPlugin({
  compressor: {
    pure_getters: true, // foo.bar or foo["bar"]) doesn't have any side effects.
    unsafe: true, // several transforms exp.toString() → "" + exp, Array(1, 2, 3) → [ 1, 2, 3 ], new Object/RegExp/Function/Error/Array (...) → we discard the new, .. 
    unsafe_comps: true, // unsafe comparaison <= to > etc.
    screw_ie8: true, // special identifier not between quote (as ie8 needs) 'class' => class
    warnings: false
  }
})

resolve: {
  extensions: ['', '.js'],
  // the default is : ["", ".webpack.js", ".web.js", ".js"]
  // ''    : is needed when require('toto.js') (at least)
  // '.js' : is needed when require('./src') (to find index.js)
  
  alias: {
    'react-line': path.resolve('src', 'index.js') // replace require('react-line') per require('./src./index.js')
    'react-test': 'react' // 'react' instead of 'react-test'
    // require('react-test/toto.js') ==> require('react/toto.js')
  }
}

plugins: [
    new webpack.NormalModuleReplacementPlugin(/\.css$/, 'node-noop'),
    ...
]

loaders: [{
    test: /\.js$/,
    loaders: ['babel-loader'],
    //exclude: /node_modules/,  // don't exclude, include instead !
    include: [
      path.resolve(__dirname, 'src'), // .resolve() give a absolute path
      path.resolve(__dirname, 'node_modules', 'moduleName') // include that if the module is written in ES6 (to babelize it too)
      // you need if you have this error for instance:
      // Module parse failed: ...\index.js Line 1: Unexpected reserved word
      // You may need an appropriate loader to handle this file type.
      // | import React from 'react';
    ]
}]