express だけ除外してバンドルする node 向け webpack.config.js

webpack.config.js

const path = require('path');

module.exports = {
  devtool: "source-map",
  mode: 'production',
  target: 'node',
  externals: function (context, request, callback) {
    // use express in server install
    // npm install express
    // NODE_PATH=`npm root -g` node dist/app-bundle.js
    if (request === 'express') {
      return callback(null, 'commonjs ' + request);
    }
    callback();
  },
  entry: {
    app: './src/app.js',
  },
  output: {
    filename: 'app-bundle.js',
    path: path.join(__dirname, '/dist'), // eslint-disable-line
  },
  optimization: {
    minimize: false
  },
  plugins: [
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [{
          loader: 'babel-loader',
          options: {
            presets: [[
              '@babel/preset-env', {
                "targets": {
                  "node": "current"
                }
              }
            ]]
          }
        }]
      }
    ]
  },
  resolve: {
    extensions: ['.js'],
    modules: [
      "node_modules"
    ]
  },
  performance: {
    hints: false
  }
};