webpack.config.js

const path = require('path')

module.exports = {
  entry: './src/index.ts',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: './bundle.js',
    libraryTarget: 'umd',
    library: 'Interval',
    umdNamedDefine: true
  },

  // Enable sourcemaps for debugging webpack's output.
  devtool: 'source-map',

  resolve: {
    // Add '.ts' and '.tsx' as resolvable extensions.
    extensions: ['.webpack.js', '.web.js', '.ts', '.tsx', '.js']
  },

  module: {
    rules: [
      // All files with a '.ts' or '.tsx' extension will be handled by 'awesome-typescript-loader'.
      { test: /\.tsx?$/, loader: 'awesome-typescript-loader', exclude: /node_modules/ },

      // All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
      { test: /\.js$/, loader: 'source-map-loader' }
    ]
  }
}