webpack.config.js

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

const mainPath = path.resolve(__dirname, 'src/scripts', 'main.js');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin')


module.exports = {
    cache: true,
    entry: {
      app: mainPath
    },
    output: {
      filename: '[name].bundle.js',
    },
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          loader: 'babel-loader'
        }
      ]
    },
    plugins: [
      new webpack.optimize.UglifyJsPlugin({
        compress: {
          warnings: false
        }
      })
    ]
};