webpack.config.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, './dist'),
    publicPath: '/dist/',
    filename: 'build.js',
  },
  module: {

    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          loaders: {},
          // other vue-loader options go here
        },
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]?[hash]',
        },
      },
      { 
          test: /worker\.js$/,
          loader: 'worker'
      }      
    ],
  },
  resolve: {
    alias: {
      vue$: 'vue/dist/vue.esm.js',
    },
  },
  devServer: {
    historyApiFallback: true,
    noInfo: true,
  },
  performance: {
    hints: false,
  },
  devtool: '#eval-source-map',
};

if (process.env.NODE_ENV === 'production') {
  module.exports.devtool = '#source-map';
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"',
      },
    }),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: false,
      },
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
    }),
  ]);
}