webpack.config.js

var path = require('path');
const postCSSImport = require('postcss-import');
const VueLoaderPlugin = require('vue-loader/lib/plugin');

module.exports = {
  entry: './src/main.js',
  output: {
    path: path.resolve(__dirname, './dist'),
    publicPath: '/dist/',
    filename: 'build.js'
  },
  mode: 'development',
  resolve: {
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@src': path.resolve(__dirname, 'src')
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.js$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: ['istanbul']
          }
        },
        exclude: /node_modules/
      }, {
        test: /\.scss$/,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: 'postcss-loader',
            options: {
              plugins: loader => [
                postCSSImport({ root: loader.resourcePath }),
              ],
            },
          },
          "sass-loader"
        ]
      }
    ]
  },
  performance: {
    hints: false
  },
  plugins: [
    new VueLoaderPlugin(),
  ],
  devtool: '#eval-source-map'
};

// test specific setups
if (process.env.NODE_ENV === 'test') {
  module.exports.externals = [require('webpack-node-externals')()]
  module.exports.devtool = 'eval'
}