webpack.config.js

var path = require('path');
var webpack = require('webpack');
var CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');

module.exports = {
 devtool: 'source-map',
 entry: {
 'XeChart': './assets/js/XeChart.js'
 },
 output: {
 path: path.resolve(__dirname, './assets/js/build'),
 filename: '[name].js',
 },
 plugins: [
 new webpack.NoEmitOnErrorsPlugin(),
 new webpack.optimize.UglifyJsPlugin({ mangle: true, warnings: false, sourceMap: false }),
 new webpack.DefinePlugin({
 'process.env': {
 NODE_ENV: JSON.stringify('production'),
 },
 }),
 ],
 module: {
 rules: [
 {
 test: /(\.js|\.jsx)$/,
 exclude: /node_modules/,
 use: {
 loader: 'babel-loader',
 options: {
 cacheDirectory: true,
 presets: ['env'],
 },
 },
 },
 ],
 },
 resolve: {
 extensions: ['.js'],
 },
 externals: {
 window: 'window',
 },
};;