webpack.config.js

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

var PATHS = {
  entryPoint: path.resolve(__dirname, 'src/index.ts'),
  bundles: path.resolve(__dirname, '_bundles'),
}

var config = {
  // These are the entry point of our library. We tell webpack to use
  // the name we assign later, when creating the bundle. We also use
  // the name to filter the second entry point for applying code
  // minification via UglifyJS
  entry: {
    'my-lib': [PATHS.entryPoint],
    'my-lib.min': [PATHS.entryPoint]
  },
  // The output defines how and where we want the bundles. The special
  // value `[name]` in `filename` tell Webpack to use the name we defined above.
  // We target a UMD and name it MyLib. When including the bundle in the browser
  // it will be accessible at `window.MyLib`
  output: {
    path: PATHS.bundles,
    filename: '[name].js',
    libraryTarget: 'umd',
    library: 'MyLib',
    umdNamedDefine: true
  },
  // Add resolve for `tsx` and `ts` files, otherwise Webpack would
  // only look for common JavaScript file extension (.js)
  resolve: {
    extensions: ['.ts', '.tsx', '.js']
  },
  // Activate source maps for the bundles in order to preserve the original
  // source when the user debugs the application
  devtool: 'source-map',
  plugins: [
    // Apply minification only on the second bundle by
    // using a RegEx on the name, which must end with `.min.js`
    // NB: Remember to activate sourceMaps in UglifyJsPlugin
    // since they are disabled by default!
    new webpack.optimize.UglifyJsPlugin({
      minimize: true,
      sourceMap: true,
      include: /\.min\.js$/,
    })
  ],
  module: {
    // Webpack doesn't understand TypeScript files and a loader is needed.
    // `node_modules` folder is excluded in order to prevent problems with
    // the library dependencies, as well as `__tests__` folders that
    // contain the tests for the library
    loaders: [{
      test: /\.tsx?$/,
      loader: 'awesome-typescript-loader',
      exclude: /node_modules/,
      query: {
        // we don't want any declaration file in the bundles
        // folder since it wouldn't be of any use ans the source
        // map already include everything for debugging
        declaration: false,
      }
    }]
  }
}

module.exports = config;