All kinds of webpack configs. [ normal, react + .babelrc ]

.babelrc

{
  "presets": ["react", "es2015", "stage-0"]
}

webpack.config.js

module.exports = {
  entry: './src/index.js',
  output: {
    path: './build',
    filename: 'bundle.js'
  }
}

webpack.config.prod.js

var debug = process.env.NODE_ENV !== "production";

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

var config = {
    devtool: 'cheap-module-source-map',
    entry: ['./src/main.js'],
    output: {
        path: path.join(__dirname, 'dist'),
        filename: 'bundle.js',
        publicPath: '/dist/'
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                loaders: ['babel'],
                exclude: /node_modules/
            }
        ]
    },
    plugins: [
        new webpack.optimize.DedupePlugin(),
        new webpack.optimize.OccurenceOrderPlugin(),
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                warnings: false
            }
        }),
        new webpack.DefinePlugin({
            'process.env': {
                'NODE_ENV': JSON.stringify('production')
            }
        })
    ]
};

module.exports = config;