webpack.config.js

'use strict';

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

const env = process.env.NODE_ENV
const config = {
  module: {
    rules: [
      {
        test: /\.js$/,
        loaders: ['babel-loader'],
        exclude: /node_modules|grammar\-parser\.js$/
      },
    ]
  },
  output: {
    library: 'formulaParser',
    libraryTarget: 'umd'
  },
  plugins: [
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(env)
    })
  ]
};

if (env === 'production') {
  config.plugins.push(
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        warnings: false,
        screw_ie8: false
      },
      mangle: {
        screw_ie8: false
      },
      output: {
        screw_ie8: false
      }
    })
  )
}

module.exports = config