webpack.config.dev.js

var path = require('path')
var webpack = require('webpack')
var HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = {
  devtool: 'source-map',
  entry: ['./src/index'],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js'
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        warnings: false,
      },
    }),
    new webpack.optimize.OccurenceOrderPlugin(),
    new HtmlWebpackPlugin({
      template: './src/index.html'
    })
  ],
  module: {
    loaders: [{
      test: /\.css$/,
      loaders: ['style', 'css']
    }, {
      test: /\.(jpe?g|gif|png|svg|woff|ttf|wav|mp3)$/,
      loader: "file"
    }, {
      test: /\.js$/,
      loader: 'babel-loader',
      query: {
        presets: ['es2015']
      }
    }]
  }
}