webpack.config.js

const path = require('path');
const postCSSImport = require('postcss-import');
const { VueLoaderPlugin } = require('vue-loader');

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$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: [
              ['istanbul'],
              [
                '@babel/plugin-transform-runtime', {
                  regenerator: true,
                },
              ],
            ],
          },
        },
        exclude: /node_modules/,
      }, {
        test: /\.scss$/,
        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';
}