webpack.config.js

const path = require('path');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const {VueLoaderPlugin} = require('vue-loader');
const ESLintPlugin = require('eslint-webpack-plugin');

module.exports = {
  mode: 'development',
  entry: path.resolve(__dirname, './src/main.js'),
  output: {
    path: path.resolve(__dirname, './dist'),
    publicPath: '/dist/',
    filename: 'build.js',
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {hmr: process.env.NODE_ENV !== 'production'},
          },
          'css-loader',
        ],
      },
      {
        test: /\.scss$/,
        use: [
          'vue-style-loader',
          {
            loader: 'css-loader',
            options: {
              esModule: false,
            },
          },
          'sass-loader',
        ],
      },
      {
        test: /\.sass$/,
        use: [
          'vue-style-loader',
          'css-loader',
          'sass-loader?indentedSyntax',
        ],
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          loaders: {
            // Since sass-loader (weirdly) has SCSS as its default parse mode, we map
            // the "scss" and "sass" values for the lang attribute to the right configs here.
            // other preprocessors should work out of the box, no loader config like this necessary.
            'scss': [
              'vue-style-loader',
              'css-loader',
              'sass-loader',
            ],
            'sass': [
              'vue-style-loader',
              'css-loader',
              'sass-loader?indentedSyntax',
            ],
          },
        },
      },
      {
        test: /\.js$/,
        use: ['babel-loader'],
        exclude: /node_modules/,
      },
      {
        test: /\.(png|jpg|gif)$/,
        type: 'asset',
      },
      {
        test: /\.svg$/,
        use: [
          'vue-loader',
          'vue-svg-loader',
        ],
      },
    ],
  },
  resolve: {
    alias: {
      'vue': '@vue/runtime-dom',
    },
    extensions: ['*', '.js', '.vue', '.json'],
  },
  devServer: {
    static: {
      directory: path.resolve(__dirname, '.'),
    },
    client: {
      progress: true,
      overlay: true,
    },
    historyApiFallback: true,
  },
  performance: {
    hints: false,
  },
  devtool: 'eval-source-map',
  plugins: [
    new VueLoaderPlugin(),
    new ESLintPlugin(),
    new webpack.DefinePlugin({
      __VUE_OPTIONS_API__: 'true',
      __VUE_PROD_DEVTOOLS__: 'false',
    }),
  ],
};

if (process.env.NODE_ENV === 'production') {
  module.exports.mode = 'production';
  module.exports.devtool = false;
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"',
      },
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
    }),
  ]);
}