webpack.config.js

var path = require('path');
var webpack = require('webpack')
var UglifyEsPlugin = require('uglify-es-webpack-plugin');

function resolve (dir) {
  return path.join(__dirname, '..', dir)
}

module.exports = {
  entry: {
      main: './src/main.js'
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'build')
  },
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src')
    }
  },
  module: {
    rules: [
        {
          test: /\.js$/,
          use: ['babel-loader'],
          exclude: /node_modules/
        },
        {
          test: /\.html$/,
          use: 'html-loader'
        },{
          test: /\.vue$/,
          use: ['vue-loader']
        }]
  },
  plugins: [
    new UglifyEsPlugin({
      compress: {
        warnings: true
      },
      sourceMap: true
    }),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"'
      }
    })
  ]
};