webpack.config.js

const path = require('path');
const webpack = require('webpack');
const { VueLoaderPlugin } = require("vue-loader");

module.exports = {
  entry: './src/main.js',
  mode: process.env.NODE_ENV || 'development',
  output: {
    filename: 'build.js',
    publicPath: '/dist/',
    path: path.resolve(__dirname, './dist')
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          'vue-style-loader',
          'css-loader',
          {
            loader: 'sass-loader',
            options: {
              // Prefer `dart-sass`
              implementation: require('sass'),
            },
          },
        ]
      },
      {
        test: /\.vue$/,
        use: ['vue-loader']
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify(process.env.NODE_ENV)
      }
    }),
    new VueLoaderPlugin()
  ]
};