webpack.config.js

const path = require('path');
require('es6-promise').polyfill();

const PATHS = {
  src: path.join(__dirname, 'src', 'index.js'),
  build: path.join(__dirname, 'build')
};

module.exports = {
  entry: {
    src: PATHS.src
  },
  output: {
    path: PATHS.build,
    filename: "common.js",
  },
  module: {
    preLoaders: [
      {
        test: /\.json$/,
        loader: 'json'
      }
        ],
    loaders: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
        query: {
          presets: ['react', 'es2015']
        }
      },
      {
        test: /\.css$/,
        loader: "style-loader!css-loader"
      },
      {
        test: /\.png$/,
        loader: "url-loader?limit=100000"
      },
      {
        test: /\.jpg$/,
        loader: "file-loader"
      },
      {
        test: /\.(woff|woff2)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'url-loader'
      },
      {
        test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'url?limit=10000&mimetype=application/octet-stream'
      },
      {
        test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file'
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'url?limit=10000&mimetype=image/svg+xml'
      }
    ]
  }
};