webpack.config.js

// Include required
var path = require('path');
var webpack = require('webpack');

module.exports = {
    output: {
        filename: 'app.js',
    },
  module: {
    loaders: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {}
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]?[hash]'
        }
      }
    ]
  },
  devtool: '#eval-source-map'
}

if (process.env.processignEnv !== 'dev') {
  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({
      compress: {
        warnings: false
      }
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true
    })
  ])
}