webpack.config.dev.js

import path from 'path';
import HtmlWebpackPlugin from 'html-webpack-plugin';
import ExtractTextPlugin from 'extract-text-webpack-plugin';
import webpack from 'webpack';

export default {
  debug: true,
  devtool: 'source-map',
  noInfo: false,
  entry: [
    path.resolve(__dirname, 'src/index')
  ],
  target: 'web',
  output: {
    path: path.resolve(__dirname, 'src'),
    publicPath: '/',
    filename: 'bundle.js'
  },
  plugins: [
    new ExtractTextPlugin('[name].[contenthash].css'),
    new HtmlWebpackPlugin({
      template: 'src/index.html',
      inject: true,
    }),
    new webpack.DefinePlugin({
      "process": {
        env: JSON.stringify(process.env || 'no_env'), // Do NOT expose on production builds, just for testing.
      }
    })
  ],
  module: {
    loaders: [{
        test: /\.js$/,
        exclude: /node_modules/,
        loaders: ['babel']
      },
      {
        test: /\.css$/,
        loader: ExtractTextPlugin.extract('css?sourceMap')
      }
    ]
  },
}