webpack.prod.js

const path = require('path');
const webpack = require('webpack');

module.exports = {
  entry: './index.js',
  output: {
    filename: 'keras-model-editor.min.js',
    path: path.resolve(__dirname, 'dist')
  },
  devtool: "source-map",
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      minimize: true,
      sourceMap: true,
      beautify: false,
      mangle: {
        screw_ie8: true,
        keep_fnames: true
      },
      compress: {
        screw_ie8: true,
        warnings: false
      },
      comments: false
    }),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production'),
      },
    }),
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env'],
            plugins: [
              require('babel-plugin-transform-exponentiation-operator'),
              require('babel-plugin-syntax-exponentiation-operator')
            ]
          }
        }
      },
      {
        test: /\.css$/,
        use: [ 'style-loader', 'css-loader' ]
      }
    ]
  }
};