webpack.config.js

var path = require('path');
var webpack = require('webpack');
var production = process.env.NODE_ENV === 'production';
var plugins = []

ts_loader = 'react-hot!ts-loader!ts-jsx-loader?harmony=true',
entry = [];

if (production) {

  ts_loader = 'ts-loader!ts-jsx-loader?harmony=true';
  plugins = plugins.concat([
    new webpack.optimize.UglifyJsPlugin({
      mangle: true,
      compress: {
        warnings: false, // Suppress uglification warnings
      },
    })
  ]);
  entry = ['./src/app.tsx'];
}
else {

  entry = [
    './src/app.tsx',
    'webpack-dev-server/client?http://localhost:8080',
    'webpack/hot/only-dev-server'
  ];
}

module.exports = {
  entry: entry,
  output: {
    path: path.join(__dirname, 'build'),
    filename: 'bundle.js',
    publicPath: '/build/'
  },
  devtool: 'source-map',
  plugins: plugins,
  resolve: {
    extensions: ['', '.ts', '.tsx', '.js']
  },
  module: {
    loaders: [
      {test: /\.ts(x?)$/, loader: ts_loader},
      {test: /\.scss$/, loader: 'style-loader!css-loader!sass-loader'},
      {test: /\.jpg|png$/, loader: "url-loader?limit=100000"}
    ]
  }
}